下载B站视频作为PPT素材

下载B站视频作为PPT素材

    • 1. 下载原理
    • 2. 网页分析
    • 3. 请求页面,找到数据
    • 4. 数据解析
    • 5. 音频、视频下载
    • 6. 合并音频与视频
    • 7. 完整代码

  其实使用爬虫也不是第一次了,之前从网站爬过图片,下载过大型文件,如今从下载视频开始才想到要写一篇关于爬虫的博客。
  这次是为了给PPT添加视频,发现我的WPS当前版本只能添加本地视频,在线视频无法添加,并且还需要会员才可以添加大于20M的视频。Office只能添加它支持的以YouTube为代表的视频网站的一些视频,无法添加像B站等国内网站的在线视频。对于添加本地视频,WPS和Office添加方法没有什么区别,WPS还有文件大小的限制。

下载B站视频作为PPT素材_第1张图片
  不能添加在线视频就只能退而求其次,添加下载好的视频,这就遇到个问题,我们要先下载好视频。

1. 下载原理

  获取视频资源的源地址,然后爬取视频的二进制内容,再写入到本地即可。

2. 网页分析

案例视频地址:https://www.bilibili.com/video/BV1Um411r7gW/?spm_id_from=333.337.search-card.all.click&vd_source=148afb6cb7e28daa45a2f426a0dec4ee

  打开该网页,然后F12进入开发者模式,接着点开网络—>全部,因为视频资源一般比较大,我这里根据大小进行了从大到小的排序,找到了第一条这些可能和视频源地址有关。

下载B站视频作为PPT素材_第2张图片
  查看页面源代码,经过查找可以发现视频在“playinfo”处,图片并不完整,大家可以自行搜取。

3. 请求页面,找到数据

	session = requests.session()
    url = 'https://www.bilibili.com/video/BV1Um411r7gW/?spm_id_from=333.337.search-card.all.click&vd_source=148afb6cb7e28daa45a2f426a0dec4ee'
    headers = {
        'user-agent': 'Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/106.0.0.0 Safari/537.36 Edg/106.0.1370.37',
        "Referer": "https://www.bilibili.com"}
    resp = session.get(url, headers=headers)
    # print(resp.text)

  利用session代替requests进行请求,session可以认为是一连串的请求,在这个过程中的cookie不会丢失。
referer代表防盗链,请求头中没有这一项将请求不到内容。防盗链可以在抓包工具中查找

4. 数据解析

	title = re.findall(r'(.*?)_哔哩哔哩_bilibili'</span><span class="token punctuation">,</span> resp<span class="token punctuation">.</span>text<span class="token punctuation">)</span><span class="token punctuation">[</span><span class="token number">0</span><span class="token punctuation">]</span>
    play_info <span class="token operator">=</span> re<span class="token punctuation">.</span>findall<span class="token punctuation">(</span><span class="token string">r'<script>window.__playinfo__=(.*?)</script>'</span><span class="token punctuation">,</span> resp<span class="token punctuation">.</span>text<span class="token punctuation">)</span><span class="token punctuation">[</span><span class="token number">0</span><span class="token punctuation">]</span>

    <span class="token triple-quoted-string string">'''print(title)
    print(play_info,type(play_info))'''</span>
    json_data <span class="token operator">=</span> json<span class="token punctuation">.</span>loads<span class="token punctuation">(</span>play_info<span class="token punctuation">)</span>
    <span class="token comment"># pprint.pprint(json_data) #格式化输出,便于观看</span>
    <span class="token comment"># print(type(json_data))</span>
    audio_url <span class="token operator">=</span> json_data<span class="token punctuation">[</span><span class="token string">'data'</span><span class="token punctuation">]</span><span class="token punctuation">[</span><span class="token string">'dash'</span><span class="token punctuation">]</span><span class="token punctuation">[</span><span class="token string">'audio'</span><span class="token punctuation">]</span><span class="token punctuation">[</span><span class="token number">0</span><span class="token punctuation">]</span><span class="token punctuation">[</span><span class="token string">'backupUrl'</span><span class="token punctuation">]</span><span class="token punctuation">[</span><span class="token number">0</span><span class="token punctuation">]</span>  <span class="token comment"># 音频地址 [0]清晰度最高</span>
    video_url <span class="token operator">=</span> json_data<span class="token punctuation">[</span><span class="token string">'data'</span><span class="token punctuation">]</span><span class="token punctuation">[</span><span class="token string">'dash'</span><span class="token punctuation">]</span><span class="token punctuation">[</span><span class="token string">'video'</span><span class="token punctuation">]</span><span class="token punctuation">[</span><span class="token number">0</span><span class="token punctuation">]</span><span class="token punctuation">[</span><span class="token string">'backupUrl'</span><span class="token punctuation">]</span><span class="token punctuation">[</span><span class="token number">0</span><span class="token punctuation">]</span>  <span class="token comment"># 视频地址</span>
</code></pre> 
  <p>title与代码对应部分</p> 
  <pre><code class="prism language-bash"><span class="token operator"><</span>title data-vue-meta<span class="token operator">=</span><span class="token string">"true"</span><span class="token operator">></span>【揭秘】Transformer诞生背后的故事_哔哩哔哩_bilibili<span class="token operator"><</span>/title<span class="token operator">></span>
</code></pre> 
  <p>playinfo与代码对应部分</p> 
  <pre><code class="prism language-bash"><span class="token operator"><</span>script<span class="token operator">></span>
<span class="token assign-left variable">window.__playinfo__</span><span class="token operator">=</span><span class="token punctuation">{</span><span class="token string">"code"</span>:0,<span class="token string">"message"</span><span class="token builtin class-name">:</span><span class="token string">"0"</span>,<span class="token string">"ttl"</span>:1,<span class="token string">"data"</span>:<span class="token punctuation">{</span><span class="token string">"from"</span><span class="token builtin class-name">:</span><span class="token string">"local"</span>,<span class="token string">"result"</span><span class="token builtin class-name">:</span><span class="token string">"suee"</span>,<span class="token string">"message"</span><span class="token builtin class-name">:</span><span class="token string">""</span>,<span class="token string">"quality"</span>:32,<span class="token string">"format"</span><span class="token builtin class-name">:</span><span class="token string">"flv480"</span>,<span class="token string">"timelength"</span>:229505,<span class="token string">"accept_format"</span><span class="token builtin class-name">:</span><span class="token string">"hdflv2,flv,flv720,flv480,mp4"</span>,<span class="token string">"accept_description"</span>:<span class="token punctuation">[</span><span class="token string">"高清 1080P+"</span>,<span class="token string">"高清 1080P"</span>,<span class="token string">"高清 720P"</span>,<span class="token string">"清晰 480P"</span>,<span class="token string">"流畅 360P"</span><span class="token punctuation">]</span>,<span class="token string">"accept_quality"</span>:<span class="token punctuation">[</span><span class="token number">112,80</span>,64,32,16<span class="token punctuation">]</span>,<span class="token string">"video_codecid"</span>:7,<span class="token string">"seek_param"</span><span class="token builtin class-name">:</span><span class="token string">"start"</span>,<span class="token string">"seek_type"</span><span class="token builtin class-name">:</span><span class="token string">"offset"</span>,<span class="token string">"dash"</span>:<span class="token punctuation">{</span><span class="token string">"duration"</span>:230,<span class="token string">"minBufferTime"</span>:1.5,<span class="token string">"min_buffer_time"</span>:1.5,<span class="token string">"video"</span>:<span class="token punctuation">[</span><span class="token punctuation">{</span><span class="token string">"id"</span>:32,<span class="token string">"baseUrl"</span><span class="token builtin class-name">:</span>
</code></pre> 
  <p>  请求到页面源代码后,解析提取“playinfo”即视频链接项,使用正则表达式(python中re库)进行提取。<br>   利用json库将提取数据转化为字典数据,并利用pprint库进行格式化输出进行分析 。</p> 
  <p>  数据中包含视频和音频两种内容,故b站的视频和音频是分开的,我们都要下载下来,然后用其他工具合成。<br>   上面已经把提取数据转化为字典,然后利用字典找到音频audio_url 和视频地址video_url。</p> 
  <h3>5. 音频、视频下载</h3> 
  <pre><code class="prism language-python">	audio_content <span class="token operator">=</span> session<span class="token punctuation">.</span>get<span class="token punctuation">(</span>audio_url<span class="token punctuation">,</span> headers<span class="token operator">=</span>headers<span class="token punctuation">)</span><span class="token punctuation">.</span>content  <span class="token comment"># 音频二进制内容</span>
    video_content <span class="token operator">=</span> session<span class="token punctuation">.</span>get<span class="token punctuation">(</span>video_url<span class="token punctuation">,</span> headers<span class="token operator">=</span>headers<span class="token punctuation">)</span><span class="token punctuation">.</span>content  <span class="token comment"># 视频二进制内容</span>
    <span class="token keyword">with</span> <span class="token builtin">open</span><span class="token punctuation">(</span><span class="token string">r'D:\documents\python\daily\download/'</span> <span class="token operator">+</span> title <span class="token operator">+</span> <span class="token string">'.mp3'</span><span class="token punctuation">,</span> <span class="token string">'wb'</span><span class="token punctuation">)</span> <span class="token keyword">as</span> f<span class="token punctuation">:</span>
        f<span class="token punctuation">.</span>write<span class="token punctuation">(</span>audio_content<span class="token punctuation">)</span>
    <span class="token keyword">with</span> <span class="token builtin">open</span><span class="token punctuation">(</span><span class="token string">r'D:\documents\python\daily\download/'</span> <span class="token operator">+</span> title <span class="token operator">+</span> <span class="token string">'.mp4'</span><span class="token punctuation">,</span> <span class="token string">'wb'</span><span class="token punctuation">)</span> <span class="token keyword">as</span> f<span class="token punctuation">:</span>
        f<span class="token punctuation">.</span>write<span class="token punctuation">(</span>video_content<span class="token punctuation">)</span>
</code></pre> 
  <p>  请求音频和视频地址,并下载下来。</p> 
  <h3>6. 合并音频与视频</h3> 
  <pre><code class="prism language-python"><span class="token keyword">from</span> moviepy<span class="token punctuation">.</span>editor <span class="token keyword">import</span> <span class="token operator">*</span>


<span class="token keyword">def</span> <span class="token function">merge</span><span class="token punctuation">(</span>title<span class="token punctuation">)</span><span class="token punctuation">:</span>
    video_path <span class="token operator">=</span> title <span class="token operator">+</span> <span class="token string">'.mp4'</span>
    audio_path <span class="token operator">=</span> title <span class="token operator">+</span> <span class="token string">'.mp3'</span>
    <span class="token comment"># 提取音轨</span>
    audio <span class="token operator">=</span> AudioFileClip<span class="token punctuation">(</span>audio_path<span class="token punctuation">)</span>
    <span class="token comment"># 读入视频</span>
    video <span class="token operator">=</span> VideoFileClip<span class="token punctuation">(</span>video_path<span class="token punctuation">)</span>
    <span class="token comment"># 将音轨合并到视频中</span>
    video <span class="token operator">=</span> video<span class="token punctuation">.</span>set_audio<span class="token punctuation">(</span>audio<span class="token punctuation">)</span>
    <span class="token comment"># 输出</span>
    video<span class="token punctuation">.</span>write_videofile<span class="token punctuation">(</span><span class="token string-interpolation"><span class="token string">f"</span><span class="token interpolation"><span class="token punctuation">{</span>title<span class="token punctuation">}</span></span><span class="token string">(含音频).mp4"</span></span><span class="token punctuation">)</span>
</code></pre> 
  <p>调用</p> 
  <pre><code class="prism language-python">	merge<span class="token punctuation">(</span>title<span class="token punctuation">)</span>
    <span class="token keyword">print</span><span class="token punctuation">(</span><span class="token string">'有音频视频处理完成'</span><span class="token punctuation">)</span>
</code></pre> 
  <h3>7. 完整代码</h3> 
  <pre><code class="prism language-python"><span class="token comment"># -*- coding : UTF-8 -*-</span>
<span class="token comment"># @file   : download_bilibili.py</span>
<span class="token comment"># @Time   : 2024/8/26 0026 7:51</span>
<span class="token comment"># @Author : Administrator</span>


<span class="token keyword">import</span> pprint
<span class="token keyword">import</span> requests
<span class="token keyword">import</span> re
<span class="token keyword">import</span> json
<span class="token keyword">from</span> moviepy<span class="token punctuation">.</span>editor <span class="token keyword">import</span> <span class="token operator">*</span>


<span class="token keyword">def</span> <span class="token function">merge</span><span class="token punctuation">(</span>title<span class="token punctuation">)</span><span class="token punctuation">:</span>
    video_path <span class="token operator">=</span> title <span class="token operator">+</span> <span class="token string">'.mp4'</span>
    audio_path <span class="token operator">=</span> title <span class="token operator">+</span> <span class="token string">'.mp3'</span>
    <span class="token comment"># 提取音轨</span>
    audio <span class="token operator">=</span> AudioFileClip<span class="token punctuation">(</span>audio_path<span class="token punctuation">)</span>
    <span class="token comment"># 读入视频</span>
    video <span class="token operator">=</span> VideoFileClip<span class="token punctuation">(</span>video_path<span class="token punctuation">)</span>
    <span class="token comment"># 将音轨合并到视频中</span>
    video <span class="token operator">=</span> video<span class="token punctuation">.</span>set_audio<span class="token punctuation">(</span>audio<span class="token punctuation">)</span>
    <span class="token comment"># 输出</span>
    video<span class="token punctuation">.</span>write_videofile<span class="token punctuation">(</span><span class="token string-interpolation"><span class="token string">f"</span><span class="token interpolation"><span class="token punctuation">{</span>title<span class="token punctuation">}</span></span><span class="token string">(含音频).mp4"</span></span><span class="token punctuation">)</span>


<span class="token keyword">if</span> __name__ <span class="token operator">==</span> <span class="token string">"__main__"</span><span class="token punctuation">:</span>
    session <span class="token operator">=</span> requests<span class="token punctuation">.</span>session<span class="token punctuation">(</span><span class="token punctuation">)</span>
    url <span class="token operator">=</span> <span class="token string">'https://www.bilibili.com/video/BV1Um411r7gW/?spm_id_from=333.337.search-card.all.click&vd_source=148afb6cb7e28daa45a2f426a0dec4ee'</span>
    headers <span class="token operator">=</span> <span class="token punctuation">{</span>
        <span class="token string">'user-agent'</span><span class="token punctuation">:</span> <span class="token string">'Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/106.0.0.0 Safari/537.36 Edg/106.0.1370.37'</span><span class="token punctuation">,</span>
        <span class="token string">"Referer"</span><span class="token punctuation">:</span> <span class="token string">"https://www.bilibili.com"</span><span class="token punctuation">}</span>
    resp <span class="token operator">=</span> session<span class="token punctuation">.</span>get<span class="token punctuation">(</span>url<span class="token punctuation">,</span> headers<span class="token operator">=</span>headers<span class="token punctuation">)</span>
    <span class="token comment"># print(resp.text)</span>
    title <span class="token operator">=</span> re<span class="token punctuation">.</span>findall<span class="token punctuation">(</span><span class="token string">r'<title data-vue-meta="true">(.*?)_哔哩哔哩_bilibili'</span><span class="token punctuation">,</span> resp<span class="token punctuation">.</span>text<span class="token punctuation">)</span><span class="token punctuation">[</span><span class="token number">0</span><span class="token punctuation">]</span>
    play_info <span class="token operator">=</span> re<span class="token punctuation">.</span>findall<span class="token punctuation">(</span><span class="token string">r'<script>window.__playinfo__=(.*?)</script>'</span><span class="token punctuation">,</span> resp<span class="token punctuation">.</span>text<span class="token punctuation">)</span><span class="token punctuation">[</span><span class="token number">0</span><span class="token punctuation">]</span>

    <span class="token triple-quoted-string string">'''print(title)
    print(play_info,type(play_info))'''</span>
    json_data <span class="token operator">=</span> json<span class="token punctuation">.</span>loads<span class="token punctuation">(</span>play_info<span class="token punctuation">)</span>
    <span class="token comment"># pprint.pprint(json_data) #格式化输出,便于观看</span>
    <span class="token comment"># print(type(json_data))</span>
    audio_url <span class="token operator">=</span> json_data<span class="token punctuation">[</span><span class="token string">'data'</span><span class="token punctuation">]</span><span class="token punctuation">[</span><span class="token string">'dash'</span><span class="token punctuation">]</span><span class="token punctuation">[</span><span class="token string">'audio'</span><span class="token punctuation">]</span><span class="token punctuation">[</span><span class="token number">0</span><span class="token punctuation">]</span><span class="token punctuation">[</span><span class="token string">'backupUrl'</span><span class="token punctuation">]</span><span class="token punctuation">[</span><span class="token number">0</span><span class="token punctuation">]</span>  <span class="token comment"># 音频地址 [0]清晰度最高</span>
    video_url <span class="token operator">=</span> json_data<span class="token punctuation">[</span><span class="token string">'data'</span><span class="token punctuation">]</span><span class="token punctuation">[</span><span class="token string">'dash'</span><span class="token punctuation">]</span><span class="token punctuation">[</span><span class="token string">'video'</span><span class="token punctuation">]</span><span class="token punctuation">[</span><span class="token number">0</span><span class="token punctuation">]</span><span class="token punctuation">[</span><span class="token string">'backupUrl'</span><span class="token punctuation">]</span><span class="token punctuation">[</span><span class="token number">0</span><span class="token punctuation">]</span>  <span class="token comment"># 视频地址</span>

    audio_content <span class="token operator">=</span> session<span class="token punctuation">.</span>get<span class="token punctuation">(</span>audio_url<span class="token punctuation">,</span> headers<span class="token operator">=</span>headers<span class="token punctuation">)</span><span class="token punctuation">.</span>content  <span class="token comment"># 音频二进制内容</span>
    video_content <span class="token operator">=</span> session<span class="token punctuation">.</span>get<span class="token punctuation">(</span>video_url<span class="token punctuation">,</span> headers<span class="token operator">=</span>headers<span class="token punctuation">)</span><span class="token punctuation">.</span>content  <span class="token comment"># 视频二进制内容</span>
    <span class="token keyword">with</span> <span class="token builtin">open</span><span class="token punctuation">(</span><span class="token string">r'D:\documents\python\daily\download/'</span> <span class="token operator">+</span> title <span class="token operator">+</span> <span class="token string">'.mp3'</span><span class="token punctuation">,</span> <span class="token string">'wb'</span><span class="token punctuation">)</span> <span class="token keyword">as</span> f<span class="token punctuation">:</span>
        f<span class="token punctuation">.</span>write<span class="token punctuation">(</span>audio_content<span class="token punctuation">)</span>
    <span class="token keyword">with</span> <span class="token builtin">open</span><span class="token punctuation">(</span><span class="token string">r'D:\documents\python\daily\download/'</span> <span class="token operator">+</span> title <span class="token operator">+</span> <span class="token string">'.mp4'</span><span class="token punctuation">,</span> <span class="token string">'wb'</span><span class="token punctuation">)</span> <span class="token keyword">as</span> f<span class="token punctuation">:</span>
        f<span class="token punctuation">.</span>write<span class="token punctuation">(</span>video_content<span class="token punctuation">)</span>
    merge<span class="token punctuation">(</span>title<span class="token punctuation">)</span>
    <span class="token keyword">print</span><span class="token punctuation">(</span><span class="token string">'有音频视频处理完成'</span><span class="token punctuation">)</span>
</code></pre> 
  <p>  将视频下载到本地后,无论是添加到Office的PPT中还是WPS的PPT中都很方便,但是遇到WPS的PPT有文件大小限制,所以还是使用了Office的PPT。</p> 
  <p>参考:用Python制作一个B站视频下载小工具(文末附完整代码)<br> 参考:bilibili视频合集下载,python实现</p> 
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                           title="PDF转Markdown - Python 实现方案与代码" target="_blank">PDF转Markdown - Python 实现方案与代码</a>
                        <span class="text-muted">Eiceblue</span>
<a class="tag" taget="_blank" href="/search/Python/1.htm">Python</a><a class="tag" taget="_blank" href="/search/Python/1.htm">Python</a><a class="tag" taget="_blank" href="/search/PDF/1.htm">PDF</a><a class="tag" taget="_blank" href="/search/pdf/1.htm">pdf</a><a class="tag" taget="_blank" href="/search/python/1.htm">python</a><a class="tag" taget="_blank" href="/search/%E5%BC%80%E5%8F%91%E8%AF%AD%E8%A8%80/1.htm">开发语言</a><a class="tag" taget="_blank" href="/search/vscode/1.htm">vscode</a>
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<a class="tag" taget="_blank" href="/search/%E4%BF%A1%E6%81%AF%E5%8F%AF%E8%A7%86%E5%8C%96/1.htm">信息可视化</a><a class="tag" taget="_blank" href="/search/python/1.htm">python</a><a class="tag" taget="_blank" href="/search/%E5%BC%80%E5%8F%91%E8%AF%AD%E8%A8%80/1.htm">开发语言</a><a class="tag" taget="_blank" href="/search/ai/1.htm">ai</a>
                        <div>使用Python和Gradio构建实时数据可视化工具关键词:Python、Gradio、数据可视化、实时数据、Web应用、交互式界面、数据科学摘要:本文将详细介绍如何使用Python和Gradio框架构建一个实时数据可视化工具。我们将从基础概念开始,逐步深入到核心算法实现,包括数据处理、可视化技术以及Gradio的交互式界面设计。通过实际项目案例,读者将学习如何创建一个功能完整、响应迅速的实时数据</div>
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                        <span class="text-muted">PythonAI编程架构实战家</span>
<a class="tag" taget="_blank" href="/search/Python%E7%BC%96%E7%A8%8B%E4%B9%8B%E9%81%93/1.htm">Python编程之道</a><a class="tag" taget="_blank" href="/search/python/1.htm">python</a><a class="tag" taget="_blank" href="/search/%E5%BC%80%E5%8F%91%E8%AF%AD%E8%A8%80/1.htm">开发语言</a><a class="tag" taget="_blank" href="/search/ai/1.htm">ai</a>
                        <div>PythonGradio:实现交互式图像编辑关键词:Python,Gradio,交互式图像编辑,计算机视觉,深度学习,图像处理,Web应用摘要:本文将深入探讨如何使用Python的Gradio库构建交互式图像编辑应用。我们将从基础概念开始,逐步介绍Gradio的核心功能,并通过实际代码示例展示如何实现各种图像处理功能。文章将涵盖图像滤镜应用、对象检测、风格迁移等高级功能,同时提供完整的项目实战案例</div>
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                        <span class="text-muted">卢政权1</span>
<a class="tag" taget="_blank" href="/search/%E4%BF%A1%E6%81%AF%E5%8F%AF%E8%A7%86%E5%8C%96/1.htm">信息可视化</a><a class="tag" taget="_blank" href="/search/%E6%95%B0%E6%8D%AE%E5%88%86%E6%9E%90/1.htm">数据分析</a><a class="tag" taget="_blank" href="/search/%E6%95%B0%E6%8D%AE%E6%8C%96%E6%8E%98/1.htm">数据挖掘</a>
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                           title="Python 程序设计讲义(25):循环结构——嵌套循环" target="_blank">Python 程序设计讲义(25):循环结构——嵌套循环</a>
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                        <div>Python程序设计讲义(25):循环结构——嵌套循环目录Python程序设计讲义(25):循环结构——嵌套循环一、嵌套循环的执行流程二、嵌套循环对应的几种情况1、内循环和外循环互不影响2、外循环迭代影响内循环的条件3、外循环迭代影响内循环的循环体嵌套循环是指在一个循环体中嵌套另一个循环。while循环中可以嵌入另一个while循环或for循环。反之,也可以在for循环中嵌入另一个for循环或wh</div>
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                        <span class="text-muted">张欣-男</span>
<a class="tag" taget="_blank" href="/search/python/1.htm">python</a><a class="tag" taget="_blank" href="/search/ocr/1.htm">ocr</a><a class="tag" taget="_blank" href="/search/%E5%BC%80%E5%8F%91%E8%AF%AD%E8%A8%80/1.htm">开发语言</a><a class="tag" taget="_blank" href="/search/PaddleOCR/1.htm">PaddleOCR</a><a class="tag" taget="_blank" href="/search/PaddlePaddle/1.htm">PaddlePaddle</a>
                        <div>基于Python引擎的PP-OCR模型库推理1.文本检测模型推理#下载超轻量中文检测模型:wgethttps://paddleocr.bj.bcebos.com/PP-OCRv3/chinese/ch_PP-OCRv3_det_infer.tartarxfch_PP-OCRv3_det_infer.tarpython3tools/infer/predict_det.py--image_dir=".</div>
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                        <span class="text-muted">Agent加载失败</span>
<a class="tag" taget="_blank" href="/search/%E4%BA%BA%E5%B7%A5%E6%99%BA%E8%83%BD/1.htm">人工智能</a><a class="tag" taget="_blank" href="/search/python/1.htm">python</a><a class="tag" taget="_blank" href="/search/%E5%BC%80%E6%BA%90/1.htm">开源</a><a class="tag" taget="_blank" href="/search/%E7%AE%97%E6%B3%95/1.htm">算法</a><a class="tag" taget="_blank" href="/search/AI%E7%BC%96%E7%A8%8B/1.htm">AI编程</a>
                        <div>还记得三个月前那个在闲鱼被炒到万元邀请码的Manus吗?现在你点官网,直接提示「所在地区不可用」了它走了,但更香的国产开源项目出现了:AiPy(爱派)。主打一个极致简化的AIAgent理念:别搞什么插件市场、Agent路由,直接给AI一个Python解释器,让它用自然语言写代码干活。听起来狠活?实际体验更狠:•完全本地化,界面傻瓜式操作,支持自然语言生成&执行Python任务;•数据清洗、文档总结</div>
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                        <span class="text-muted">九章云极AladdinEdu</span>
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                        <div>点击“AladdinEdu,同学们用得起的【H卡】算力平台”,H卡级别算力,按量计费,灵活弹性,顶级配置,学生专属优惠。用Python动画演示损失函数优化过程,数学公式具象化读者收获:直观理解模型训练本质,破除"数学恐惧症"当盲人登山者摸索下山路径时,他本能地运用了梯度下降算法。本文将用动态可视化技术,让你像感受重力一样理解AI训练的核心原理——无需任何数学公式推导。一、梯度下降:AI世界的"万有</div>
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                           title="2025.07 Java入门笔记01" target="_blank">2025.07 Java入门笔记01</a>
                        <span class="text-muted">殷浩焕</span>
<a class="tag" taget="_blank" href="/search/%E7%AC%94%E8%AE%B0/1.htm">笔记</a>
                        <div>一、熟悉IDEA和Java语法(一)LiuCourseJavaOOP1.一直在用C++开发,python也用了些,Java是真的不熟,用什么IDE还是问的同事;2.一开始安装了jdk-23,拿VSCode当编辑器,在cmd窗口编译运行,也能玩;但是想正儿八经搞项目开发,还是需要IDE;3.安装了IDEA社区版:(1)IDE通常自带对应编程语言的安装包,例如IDEA自带jbr-21(和jdk是不同的</div>
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                           title="响应式编程实践:Spring Boot WebFlux构建高性能非阻塞服务" target="_blank">响应式编程实践:Spring Boot WebFlux构建高性能非阻塞服务</a>
                        <span class="text-muted">fanxbl957</span>
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                        <div>博主介绍:Java、Python、js全栈开发“多面手”,精通多种编程语言和技术,痴迷于人工智能领域。秉持着对技术的热爱与执着,持续探索创新,愿在此分享交流和学习,与大家共进步。全栈开发环境搭建运行攻略:多语言一站式指南(环境搭建+运行+调试+发布+保姆级详解)感兴趣的可以先收藏起来,希望帮助更多的人响应式编程实践:SpringBootWebFlux构建高性能非阻塞服务一、引言在当今数字化时代,互</div>
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                                <li><a href="/article/61.htm"
                                       title="Enum用法" target="_blank">Enum用法</a>
                                    <span class="text-muted">不懂事的小屁孩</span>
<a class="tag" taget="_blank" href="/search/enum/1.htm">enum</a>
                                    <div>以前的时候知道enum,但是真心不怎么用,在实际开发中,经常会用到以下代码: 
 
protected final static String XJ = "XJ";
protected final static String YHK = "YHK";
protected final static String PQ = "PQ";
</div>
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                                <li><a href="/article/188.htm"
                                       title="【Spark九十七】RDD API之aggregateByKey" target="_blank">【Spark九十七】RDD API之aggregateByKey</a>
                                    <span class="text-muted">bit1129</span>
<a class="tag" taget="_blank" href="/search/spark/1.htm">spark</a>
                                    <div>1. aggregateByKey的运行机制 
  
  /**
   * Aggregate the values of each key, using given combine functions and a neutral "zero value".
   * This function can return a different result type</div>
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                                <li><a href="/article/315.htm"
                                       title="hive创建表是报错: Specified key was too long; max key length is 767 bytes" target="_blank">hive创建表是报错: Specified key was too long; max key length is 767 bytes</a>
                                    <span class="text-muted">daizj</span>
<a class="tag" taget="_blank" href="/search/hive/1.htm">hive</a>
                                    <div>今天在hive客户端创建表时报错,具体操作如下 
  
hive> create table test2(id string); 
FAILED: Execution Error, return code 1 from org.apache.hadoop.hive.ql.exec.DDLTask. MetaException(message:javax.jdo.JDODataSto</div>
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                                <li><a href="/article/442.htm"
                                       title="Map 与 JavaBean之间的转换" target="_blank">Map 与 JavaBean之间的转换</a>
                                    <span class="text-muted">周凡杨</span>
<a class="tag" taget="_blank" href="/search/java/1.htm">java</a><a class="tag" taget="_blank" href="/search/%E8%87%AA%E7%9C%81/1.htm">自省</a><a class="tag" taget="_blank" href="/search/%E8%BD%AC%E6%8D%A2/1.htm">转换</a><a class="tag" taget="_blank" href="/search/%E5%8F%8D%E5%B0%84/1.htm">反射</a>
                                    <div>   
最近项目里需要一个工具类,它的功能是传入一个Map后可以返回一个JavaBean对象。很喜欢写这样的Java服务,首先我想到的是要通过Java 的反射去实现匿名类的方法调用,这样才可以把Map里的值set 到JavaBean里。其实这里用Java的自省会更方便,下面两个方法就是一个通过反射,一个通过自省来实现本功能。 
1:JavaBean类 
 
1 &nb</div>
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                                <li><a href="/article/569.htm"
                                       title="java连接ftp下载" target="_blank">java连接ftp下载</a>
                                    <span class="text-muted">g21121</span>
<a class="tag" taget="_blank" href="/search/java/1.htm">java</a>
                                    <div>有的时候需要用到java连接ftp服务器下载,上传一些操作,下面写了一个小例子。 
/** ftp服务器地址 */
private String ftpHost;
/** ftp服务器用户名 */
private String ftpName;
/** ftp服务器密码 */
private String ftpPass;
/** ftp根目录 */
private String f</div>
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                                <li><a href="/article/696.htm"
                                       title="web报表工具FineReport使用中遇到的常见报错及解决办法(二)" target="_blank">web报表工具FineReport使用中遇到的常见报错及解决办法(二)</a>
                                    <span class="text-muted">老A不折腾</span>
<a class="tag" taget="_blank" href="/search/finereport/1.htm">finereport</a><a class="tag" taget="_blank" href="/search/web%E6%8A%A5%E8%A1%A8/1.htm">web报表</a><a class="tag" taget="_blank" href="/search/java%E6%8A%A5%E8%A1%A8/1.htm">java报表</a><a class="tag" taget="_blank" href="/search/%E6%80%BB%E7%BB%93/1.htm">总结</a>
                                    <div>  
抛砖引玉,希望大家能把自己整理的问题及解决方法晾出来,Mark一下,利人利己。 
  
出现问题先搜一下文档上有没有,再看看度娘有没有,再看看论坛有没有。有报错要看日志。下面简单罗列下常见的问题,大多文档上都有提到的。 
  
1、没有返回数据集: 
在存储过程中的操作语句之前加上set nocount on 或者在数据集exec调用存储过程的前面加上这句。当S</div>
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                                <li><a href="/article/823.htm"
                                       title="linux 系统cpu 内存等信息查看" target="_blank">linux 系统cpu 内存等信息查看</a>
                                    <span class="text-muted">墙头上一根草</span>
<a class="tag" taget="_blank" href="/search/cpu/1.htm">cpu</a><a class="tag" taget="_blank" href="/search/%E5%86%85%E5%AD%98/1.htm">内存</a><a class="tag" taget="_blank" href="/search/liunx/1.htm">liunx</a>
                                    <div>1 查看CPU 
  1.1 查看CPU个数 
  # cat /proc/cpuinfo | grep "physical id" | uniq | wc -l 
  2 
  **uniq命令:删除重复行;wc –l命令:统计行数** 
  1.2 查看CPU核数 
  # cat /proc/cpuinfo | grep "cpu cores" | u</div>
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                                <li><a href="/article/950.htm"
                                       title="Spring中的AOP" target="_blank">Spring中的AOP</a>
                                    <span class="text-muted">aijuans</span>
<a class="tag" taget="_blank" href="/search/spring/1.htm">spring</a><a class="tag" taget="_blank" href="/search/AOP/1.htm">AOP</a>
                                    <div>   
Spring中的AOP  
Written by Tony Jiang @ 2012-1-18 (转)何为AOP 
AOP,面向切面编程。 
在不改动代码的前提下,灵活的在现有代码的执行顺序前后,添加进新规机能。 
来一个简单的Sample: 
目标类:    
[java]  
view plain 
copy 
print 
?     
 
 package&nb</div>
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                                <li><a href="/article/1077.htm"
                                       title="placeholder(HTML 5) IE 兼容插件" target="_blank">placeholder(HTML 5) IE 兼容插件</a>
                                    <span class="text-muted">alxw4616</span>
<a class="tag" taget="_blank" href="/search/JavaScript/1.htm">JavaScript</a><a class="tag" taget="_blank" href="/search/jquery+jQuery%E6%8F%92%E4%BB%B6/1.htm">jquery jQuery插件</a>
                                    <div>placeholder 这个属性被越来越频繁的使用.
但为做HTML 5 特性IE没能实现这东西.
以下的jQuery插件就是用来在IE上实现该属性的. 

/**
 * [placeholder(HTML 5) IE 实现.IE9以下通过测试.]
 * v 1.0 by oTwo 2014年7月31日 11:45:29
 */
$.fn.placeholder = function</div>
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                                <li><a href="/article/1204.htm"
                                       title="Object类,值域,泛型等总结(适合有基础的人看)" target="_blank">Object类,值域,泛型等总结(适合有基础的人看)</a>
                                    <span class="text-muted">百合不是茶</span>
<a class="tag" taget="_blank" href="/search/%E6%B3%9B%E5%9E%8B%E7%9A%84%E7%BB%A7%E6%89%BF%E5%92%8C%E9%80%9A%E9%85%8D%E7%AC%A6/1.htm">泛型的继承和通配符</a><a class="tag" taget="_blank" href="/search/%E5%8F%98%E9%87%8F%E7%9A%84%E5%80%BC%E5%9F%9F/1.htm">变量的值域</a><a class="tag" taget="_blank" href="/search/Object%E7%B1%BB%E8%BD%AC%E6%8D%A2/1.htm">Object类转换</a>
                                    <div>java的作用域在编程的时候经常会遇到,而我经常会搞不清楚这个 
问题,所以在家的这几天回忆一下过去不知道的每个小知识点 
  
变量的值域; 
  
package 基础;

/**
 * 作用域的范围
 * 
 * @author Administrator
 * 
 */
public class zuoyongyu {
public static vo</div>
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                                <li><a href="/article/1331.htm"
                                       title="JDK1.5 Condition接口" target="_blank">JDK1.5 Condition接口</a>
                                    <span class="text-muted">bijian1013</span>
<a class="tag" taget="_blank" href="/search/java/1.htm">java</a><a class="tag" taget="_blank" href="/search/thread/1.htm">thread</a><a class="tag" taget="_blank" href="/search/Condition/1.htm">Condition</a><a class="tag" taget="_blank" href="/search/java%E5%A4%9A%E7%BA%BF%E7%A8%8B/1.htm">java多线程</a>
                                    <div>Condition 将 Object 监视器方法(wait、notify和 notifyAll)分解成截然不同的对象,以便通过将这些对象与任意 Lock 实现组合使用,为每个对象提供多个等待 set (wait-set)。其中,Lock 替代了 synchronized 方法和语句的使用,Condition 替代了 Object 监视器方法的使用。 
条件(也称为条件队列或条件变量)为线程提供了一</div>
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                                <li><a href="/article/1458.htm"
                                       title="开源中国OSC源创会记录" target="_blank">开源中国OSC源创会记录</a>
                                    <span class="text-muted">bijian1013</span>
<a class="tag" taget="_blank" href="/search/hadoop/1.htm">hadoop</a><a class="tag" taget="_blank" href="/search/spark/1.htm">spark</a><a class="tag" taget="_blank" href="/search/MemSQL/1.htm">MemSQL</a>
                                    <div>一.Strata+Hadoop World(SHW)大会 
        是全世界最大的大数据大会之一。SHW大会为各种技术提供了深度交流的机会,还会看到最领先的大数据技术、最广泛的应用场景、最有趣的用例教学以及最全面的大数据行业和趋势探讨。        
  
二.Hadoop 
  &nbs</div>
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                                <li><a href="/article/1585.htm"
                                       title="【Java范型七】范型消除" target="_blank">【Java范型七】范型消除</a>
                                    <span class="text-muted">bit1129</span>
<a class="tag" taget="_blank" href="/search/java/1.htm">java</a>
                                    <div>范型是Java1.5引入的语言特性,它是编译时的一个语法现象,也就是说,对于一个类,不管是范型类还是非范型类,编译得到的字节码是一样的,差别仅在于通过范型这种语法来进行编译时的类型检查,在运行时是没有范型或者类型参数这个说法的。 
范型跟反射刚好相反,反射是一种运行时行为,所以编译时不能访问的变量或者方法(比如private),在运行时通过反射是可以访问的,也就是说,可见性也是一种编译时的行为,在</div>
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                                <li><a href="/article/1712.htm"
                                       title="【Spark九十四】spark-sql工具的使用" target="_blank">【Spark九十四】spark-sql工具的使用</a>
                                    <span class="text-muted">bit1129</span>
<a class="tag" taget="_blank" href="/search/spark/1.htm">spark</a>
                                    <div>spark-sql是Spark bin目录下的一个可执行脚本,它的目的是通过这个脚本执行Hive的命令,即原来通过 
hive>输入的指令可以通过spark-sql>输入的指令来完成。 
spark-sql可以使用内置的Hive metadata-store,也可以使用已经独立安装的Hive的metadata store 
  
关于Hive build into Spark</div>
                                </li>
                                <li><a href="/article/1839.htm"
                                       title="js做的各种倒计时" target="_blank">js做的各种倒计时</a>
                                    <span class="text-muted">ronin47</span>
<a class="tag" taget="_blank" href="/search/js+%E5%80%92%E8%AE%A1%E6%97%B6/1.htm">js 倒计时</a>
                                    <div> 
 第一种:精确到秒的javascript倒计时代码   
    
 HTML代码:   
 <form name="form1">   
 <div align="center" align="middle"</div>
                                </li>
                                <li><a href="/article/1966.htm"
                                       title="java-37.有n 个长为m+1 的字符串,如果某个字符串的最后m 个字符与某个字符串的前m 个字符匹配,则两个字符串可以联接" target="_blank">java-37.有n 个长为m+1 的字符串,如果某个字符串的最后m 个字符与某个字符串的前m 个字符匹配,则两个字符串可以联接</a>
                                    <span class="text-muted">bylijinnan</span>
<a class="tag" taget="_blank" href="/search/java/1.htm">java</a>
                                    <div>
public class MaxCatenate {  
  
	/*
	 * Q.37 有n 个长为m+1 的字符串,如果某个字符串的最后m 个字符与某个字符串的前m 个字符匹配,则两个字符串可以联接,
	 * 问这n 个字符串最多可以连成一个多长的字符串,如果出现循环,则返回错误。
	 */
    public static void main(String[] args){</div>
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                                <li><a href="/article/2093.htm"
                                       title="mongoDB安装" target="_blank">mongoDB安装</a>
                                    <span class="text-muted">开窍的石头</span>
<a class="tag" taget="_blank" href="/search/mongodb%E5%AE%89%E8%A3%85+%E5%9F%BA%E6%9C%AC%E6%93%8D%E4%BD%9C/1.htm">mongodb安装 基本操作</a>
                                    <div>mongoDB的安装 
   
      1:mongoDB下载   https://www.mongodb.org/downloads   
      2:下载mongoDB下载后解压 
    </div>
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                                <li><a href="/article/2220.htm"
                                       title="[开源项目]引擎的关键意义" target="_blank">[开源项目]引擎的关键意义</a>
                                    <span class="text-muted">comsci</span>
<a class="tag" taget="_blank" href="/search/%E5%BC%80%E6%BA%90%E9%A1%B9%E7%9B%AE/1.htm">开源项目</a>
                                    <div> 
 
     一个系统,最核心的东西就是引擎。。。。。 
 
      而要设计和制造出引擎,最关键的是要坚持。。。。。。 
 
      现在最先进的引擎技术,也是从莱特兄弟那里出现的,但是中间一直没有断过研发的 
   </div>
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                                <li><a href="/article/2347.htm"
                                       title="软件度量的一些方法" target="_blank">软件度量的一些方法</a>
                                    <span class="text-muted">cuiyadll</span>
<a class="tag" taget="_blank" href="/search/%E6%96%B9%E6%B3%95/1.htm">方法</a>
                                    <div>软件度量的一些方法http://cuiyingfeng.blog.51cto.com/43841/6775/在前面我们已介绍了组成软件度量的几个方面。在这里我们将先给出关于这几个方面的一个纲要介绍。在后面我们还会作进一步具体的阐述。当我们不从高层次的概念级来看软件度量及其目标的时候,我们很容易把这些活动看成是不同而且毫不相干的。我们现在希望表明他们是怎样恰如其分地嵌入我们的框架的。也就是我们度量的</div>
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                                <li><a href="/article/2474.htm"
                                       title="XSD中的targetNameSpace解释" target="_blank">XSD中的targetNameSpace解释</a>
                                    <span class="text-muted">darrenzhu</span>
<a class="tag" taget="_blank" href="/search/xml/1.htm">xml</a><a class="tag" taget="_blank" href="/search/namespace/1.htm">namespace</a><a class="tag" taget="_blank" href="/search/xsd/1.htm">xsd</a><a class="tag" taget="_blank" href="/search/targetnamespace/1.htm">targetnamespace</a>
                                    <div>参考链接:
http://blog.csdn.net/colin1014/article/details/357694 
xsd文件中定义了一个targetNameSpace后,其内部定义的元素,属性,类型等都属于该targetNameSpace,其自身或外部xsd文件使用这些元素,属性等都必须从定义的targetNameSpace中找: 
 
 
例如:以下xsd文件,就出现了该错误,即便是在一</div>
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                                <li><a href="/article/2601.htm"
                                       title="什么是RAID0、RAID1、RAID0+1、RAID5,等磁盘阵列模式?" target="_blank">什么是RAID0、RAID1、RAID0+1、RAID5,等磁盘阵列模式?</a>
                                    <span class="text-muted">dcj3sjt126com</span>
<a class="tag" taget="_blank" href="/search/raid/1.htm">raid</a>
                                    <div>RAID 1又称为Mirror或Mirroring,它的宗旨是最大限度的保证用户数据的可用性和可修复性。 RAID 1的操作方式是把用户写入硬盘的数据百分之百地自动复制到另外一个硬盘上。由于对存储的数据进行百分之百的备份,在所有RAID级别中,RAID 1提供最高的数据安全保障。同样,由于数据的百分之百备份,备份数据占了总存储空间的一半,因而,Mirror的磁盘空间利用率低,存储成本高。 
Mir</div>
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                                <li><a href="/article/2728.htm"
                                       title="yii2 restful web服务快速入门" target="_blank">yii2 restful web服务快速入门</a>
                                    <span class="text-muted">dcj3sjt126com</span>
<a class="tag" taget="_blank" href="/search/PHP/1.htm">PHP</a><a class="tag" taget="_blank" href="/search/yii2/1.htm">yii2</a>
                                    <div>快速入门 
Yii 提供了一整套用来简化实现 RESTful 风格的 Web Service 服务的 API。 特别是,Yii 支持以下关于 RESTful 风格的 API: 
 
 支持 Active Record 类的通用API的快速原型 
 涉及的响应格式(在默认情况下支持 JSON 和 XML) 
 支持可选输出字段的定制对象序列化 
 适当的格式的数据采集和验证错误 </div>
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                                <li><a href="/article/2855.htm"
                                       title="MongoDB查询(3)——内嵌文档查询(七)" target="_blank">MongoDB查询(3)——内嵌文档查询(七)</a>
                                    <span class="text-muted">eksliang</span>
<a class="tag" taget="_blank" href="/search/MongoDB%E6%9F%A5%E8%AF%A2%E5%86%85%E5%B5%8C%E6%96%87%E6%A1%A3/1.htm">MongoDB查询内嵌文档</a><a class="tag" taget="_blank" href="/search/MongoDB%E6%9F%A5%E8%AF%A2%E5%86%85%E5%B5%8C%E6%95%B0%E7%BB%84/1.htm">MongoDB查询内嵌数组</a>
                                    <div>MongoDB查询内嵌文档 
转载请出自出处:http://eksliang.iteye.com/blog/2177301 一、概述 
       有两种方法可以查询内嵌文档:查询整个文档;针对键值对进行查询。这两种方式是不同的,下面我通过例子进行分别说明。 
  二、查询整个文档 
例如:有如下文档 
db.emp.insert({
	&qu</div>
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                                <li><a href="/article/2982.htm"
                                       title="android4.4从系统图库无法加载图片的问题" target="_blank">android4.4从系统图库无法加载图片的问题</a>
                                    <span class="text-muted">gundumw100</span>
<a class="tag" taget="_blank" href="/search/android/1.htm">android</a>
                                    <div>典型的使用场景就是要设置一个头像,头像需要从系统图库或者拍照获得,在android4.4之前,我用的代码没问题,但是今天使用android4.4的时候突然发现不灵了。baidu了一圈,终于解决了。 
下面是解决方案: 
 

private String[] items = new String[] { "图库","拍照" };
		/* 头像名称 */</div>
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                                <li><a href="/article/3109.htm"
                                       title="网页特效大全 jQuery等" target="_blank">网页特效大全 jQuery等</a>
                                    <span class="text-muted">ini</span>
<a class="tag" taget="_blank" href="/search/JavaScript/1.htm">JavaScript</a><a class="tag" taget="_blank" href="/search/jquery/1.htm">jquery</a><a class="tag" taget="_blank" href="/search/css/1.htm">css</a><a class="tag" taget="_blank" href="/search/html5/1.htm">html5</a><a class="tag" taget="_blank" href="/search/ini/1.htm">ini</a>
                                    <div>HTML5和CSS3知识和特效 
asp.net ajax jquery实例 
分享一个下雪的特效 
jQuery倾斜的动画导航菜单 
选美大赛示例 你会选谁 
jQuery实现HTML5时钟 
功能强大的滚动播放插件JQ-Slide 
万圣节快乐!!! 
向上弹出菜单jQuery插件 
htm5视差动画 
jquery将列表倒转顺序 
推荐一个jQuery分页插件 
jquery animate</div>
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                                <li><a href="/article/3236.htm"
                                       title="swift objc_setAssociatedObject block(version1.2 xcode6.4)" target="_blank">swift objc_setAssociatedObject block(version1.2 xcode6.4)</a>
                                    <span class="text-muted">啸笑天</span>
<a class="tag" taget="_blank" href="/search/version/1.htm">version</a>
                                    <div>  
import UIKit

class LSObjectWrapper: NSObject {
    let value: ((barButton: UIButton?) -> Void)?
    
    init(value: (barButton: UIButton?) -> Void) {
        self.value = value
</div>
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                                <li><a href="/article/3363.htm"
                                       title="Aegis 默认的 Xfire 绑定方式,将 XML 映射为 POJO" target="_blank">Aegis 默认的 Xfire 绑定方式,将 XML 映射为 POJO</a>
                                    <span class="text-muted">MagicMa_007</span>
<a class="tag" taget="_blank" href="/search/java/1.htm">java</a><a class="tag" taget="_blank" href="/search/POJO/1.htm">POJO</a><a class="tag" taget="_blank" href="/search/xml/1.htm">xml</a><a class="tag" taget="_blank" href="/search/Aegis/1.htm">Aegis</a><a class="tag" taget="_blank" href="/search/xfire/1.htm">xfire</a>
                                    <div>      Aegis 是一个默认的 Xfire 绑定方式,它将 XML 映射为 POJO, 支持代码先行的开发.你开发服 务类与 POJO,它为你生成 XML schema/wsdl 
XML 和 注解映射概览 
      默认情况下,你的 POJO 类被是基于他们的名字与命名空间被序列化。如果</div>
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                                <li><a href="/article/3490.htm"
                                       title="js get max value in (json) Array" target="_blank">js get max value in (json) Array</a>
                                    <span class="text-muted">qiaolevip</span>
<a class="tag" taget="_blank" href="/search/%E6%AF%8F%E5%A4%A9%E8%BF%9B%E6%AD%A5%E4%B8%80%E7%82%B9%E7%82%B9/1.htm">每天进步一点点</a><a class="tag" taget="_blank" href="/search/%E5%AD%A6%E4%B9%A0%E6%B0%B8%E6%97%A0%E6%AD%A2%E5%A2%83/1.htm">学习永无止境</a><a class="tag" taget="_blank" href="/search/max/1.htm">max</a><a class="tag" taget="_blank" href="/search/%E7%BA%B5%E8%A7%82%E5%8D%83%E8%B1%A1/1.htm">纵观千象</a>
                                    <div>// Max value in Array
var arr = [1,2,3,5,3,2];Math.max.apply(null, arr); // 5


// Max value in Jaon Array
var arr = [{"x":"8/11/2009","y":0.026572007},{"x"</div>
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                                <li><a href="/article/3617.htm"
                                       title="XMLhttpRequest 请求 XML,JSON ,POJO 数据" target="_blank">XMLhttpRequest 请求 XML,JSON ,POJO 数据</a>
                                    <span class="text-muted">Luob.</span>
<a class="tag" taget="_blank" href="/search/POJO/1.htm">POJO</a><a class="tag" taget="_blank" href="/search/json/1.htm">json</a><a class="tag" taget="_blank" href="/search/Ajax/1.htm">Ajax</a><a class="tag" taget="_blank" href="/search/xml/1.htm">xml</a><a class="tag" taget="_blank" href="/search/XMLhttpREquest/1.htm">XMLhttpREquest</a>
                                    <div>在使用XMlhttpRequest对象发送请求和响应之前,必须首先使用javaScript对象创建一个XMLHttpRquest对象。 
 

var xmlhttp;
function getXMLHttpRequest(){
  if(window.ActiveXObject){
    xmlhttp:new ActiveXObject("Microsoft.XMLHTTP</div>
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                                <li><a href="/article/3744.htm"
                                       title="jquery" target="_blank">jquery</a>
                                    <span class="text-muted">wuai</span>
<a class="tag" taget="_blank" href="/search/jquery/1.htm">jquery</a>
                                    <div>以下防止文档在完全加载之前运行Jquery代码,否则会出现试图隐藏一个不存在的元素、获得未完全加载的图像的大小 等等 
 $(document).ready(function(){ 
 jquery代码; 
 }); 
 
<script type="text/javascript" src="c:/scripts/jquery-1.4.2.min.js&quo</div>
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