HttpClient开发中使用

HttpClient 是Apache Jakarta Common 下的子项目，可以用来提供高效的、最新的、功能丰富的支持 HTTP 协议的客户端编程工具包，并且它支持 HTTP 协议最新的版本和建议。
1.HttpClient特征

实现了所有 HTTP 的方法（GET、POST、PUT、HEAD、DELETE、HEAD、OPTIONS 等）	支持 HTTPS 协议
支持代理服务器（Nginx等）	支持自动（跳转）转向

环境说明：Eclipse、JDK1.8、SpringBoot

在pom.xml中引入HttpClient的依赖

	//HttpClient的依赖
		
			org.apache.httpcomponents
			httpclient
		
    //fastjson依赖 将对象转化为json字符串的功能
		
			com.alibaba
			fastjson
		

GET无参方式

    /**
	 * GET---无参测试
	 *
	 * @date 2019年6月26日 
	 */
	@Test
	public void doGetTestOne() {
		// 获得Http客户端(可以理解为:你得先有一个浏览器;注意:实际上HttpClient与浏览器是不一样的)
		CloseableHttpClient httpClient = HttpClientBuilder.create().build();
		// 创建Get请求
		HttpGet httpGet = new HttpGet("http://localhost:12345/doGetController");
 
		// 响应模型
		CloseableHttpResponse response = null;
		try {
			// 由客户端执行(发送)Get请求
			response = httpClient.execute(httpGet);
			// 从响应模型中获取响应实体
			HttpEntity responseEntity = response.getEntity();
			System.out.println("响应状态为:" + response.getStatusLine());
			if (responseEntity != null) {
				System.out.println("响应内容长度为:" + responseEntity.getContentLength());
				System.out.println("响应内容为:" + EntityUtils.toString(responseEntity));
			}
		} catch (ClientProtocolException e) {
			e.printStackTrace();
		} catch (ParseException e) {
			e.printStackTrace();
		} catch (IOException e) {
			e.printStackTrace();
		} finally {
			try {
				// 释放资源
				if (httpClient != null) {
					httpClient.close();
				}
				if (response != null) {
					response.close();
				}
			} catch (IOException e) {
				e.printStackTrace();
			}
		}
	}

GET有参(方式一：直接拼接URL)：

    /**
	 * GET---有参测试 (方式一:手动在url后面加上参数)
	 *
	 * @date 2019年6月26日 
	 */
	@Test
	public void doGetTestWayOne() {
		// 获得Http客户端(可以理解为:你得先有一个浏览器;注意:实际上HttpClient与浏览器是不一样的)
		CloseableHttpClient httpClient = HttpClientBuilder.create().build();
 
		// 参数
		StringBuffer params = new StringBuffer();
		try {
			// 字符数据最好encoding以下;这样一来，某些特殊字符才能传过去(如:某人的名字就是“&”,不encoding的话,传不过去)
			params.append("name=" + URLEncoder.encode("&", "utf-8"));
			params.append("&");
			params.append("age=24");
		} catch (UnsupportedEncodingException e1) {
			e1.printStackTrace();
		}
 
		// 创建Get请求
		HttpGet httpGet = new HttpGet("http://localhost:12345/doGetControllerTwo" + "?" + params);
		// 响应模型
		CloseableHttpResponse response = null;
		try {
			// 配置信息
			RequestConfig requestConfig = RequestConfig.custom()
					// 设置连接超时时间(单位毫秒)
					.setConnectTimeout(5000)
					// 设置请求超时时间(单位毫秒)
					.setConnectionRequestTimeout(5000)
					// socket读写超时时间(单位毫秒)
					.setSocketTimeout(5000)
					// 设置是否允许重定向(默认为true)
					.setRedirectsEnabled(true).build();
 
			// 将上面的配置信息 运用到这个Get请求里
			httpGet.setConfig(requestConfig);
 
			// 由客户端执行(发送)Get请求
			response = httpClient.execute(httpGet);
 
			// 从响应模型中获取响应实体
			HttpEntity responseEntity = response.getEntity();
			System.out.println("响应状态为:" + response.getStatusLine());
			if (responseEntity != null) {
				System.out.println("响应内容长度为:" + responseEntity.getContentLength());
				System.out.println("响应内容为:" + EntityUtils.toString(responseEntity));
			}
		} catch (ClientProtocolException e) {
			e.printStackTrace();
		} catch (ParseException e) {
			e.printStackTrace();
		} catch (IOException e) {
			e.printStackTrace();
		} finally {
			try {
				// 释放资源
				if (httpClient != null) {
					httpClient.close();
				}
				if (response != null) {
					response.close();
				}
			} catch (IOException e) {
				e.printStackTrace();
			}
		}
	}

GET有参(方式二：使用URI获得HttpGet)：

    /**
	 * GET---有参测试 (方式二:将参数放入键值对类中,再放入URI中,从而通过URI得到HttpGet实例)
	 *
	 * @date 2019年6月26日 
	 */
	@Test
	public void doGetTestWayTwo() {
		// 获得Http客户端(可以理解为:你得先有一个浏览器;注意:实际上HttpClient与浏览器是不一样的)
		CloseableHttpClient httpClient = HttpClientBuilder.create().build();
 
		// 参数
		URI uri = null;
		try {
			// 将参数放入键值对类NameValuePair中,再放入集合中
			List params = new ArrayList<>();
			params.add(new BasicNameValuePair("name", "&"));
			params.add(new BasicNameValuePair("age", "18"));
			// 设置uri信息,并将参数集合放入uri;
			// 注:这里也支持一个键值对一个键值对地往里面放setParameter(String key, String value)
			uri = new URIBuilder().setScheme("http").setHost("localhost")
					              .setPort(12345).setPath("/doGetControllerTwo")
					              .setParameters(params).build();
		} catch (URISyntaxException e1) {
			e1.printStackTrace();
		}
		// 创建Get请求
		HttpGet httpGet = new HttpGet(uri);
 
		// 响应模型
		CloseableHttpResponse response = null;
		try {
			// 配置信息
			RequestConfig requestConfig = RequestConfig.custom()
					// 设置连接超时时间(单位毫秒)
					.setConnectTimeout(5000)
					// 设置请求超时时间(单位毫秒)
					.setConnectionRequestTimeout(5000)
					// socket读写超时时间(单位毫秒)
					.setSocketTimeout(5000)
					// 设置是否允许重定向(默认为true)
					.setRedirectsEnabled(true).build();
 
			// 将上面的配置信息 运用到这个Get请求里
			httpGet.setConfig(requestConfig);
 
			// 由客户端执行(发送)Get请求
			response = httpClient.execute(httpGet);
 
			// 从响应模型中获取响应实体
			HttpEntity responseEntity = response.getEntity();
			System.out.println("响应状态为:" + response.getStatusLine());
			if (responseEntity != null) {
				System.out.println("响应内容长度为:" + responseEntity.getContentLength());
				System.out.println("响应内容为:" + EntityUtils.toString(responseEntity));
			}
		} catch (ClientProtocolException e) {
			e.printStackTrace();
		} catch (ParseException e) {
			e.printStackTrace();
		} catch (IOException e) {
			e.printStackTrace();
		} finally {
			try {
				// 释放资源
				if (httpClient != null) {
					httpClient.close();
				}
				if (response != null) {
					response.close();
				}
			} catch (IOException e) {
				e.printStackTrace();
			}
		}
	}

POST无参：

    /**
	 * POST---无参测试
	 *
	 * @date 2019年6月26日
	 */
	@Test
	public void doPostTestOne() {
 
		// 获得Http客户端(可以理解为:你得先有一个浏览器;注意:实际上HttpClient与浏览器是不一样的)
		CloseableHttpClient httpClient = HttpClientBuilder.create().build();
 
		// 创建Post请求
		HttpPost httpPost = new HttpPost("http://localhost:12345/doPostController");
		// 响应模型
		CloseableHttpResponse response = null;
		try {
			// 由客户端执行(发送)Post请求
			response = httpClient.execute(httpPost);
			// 从响应模型中获取响应实体
			HttpEntity responseEntity = response.getEntity();
 
			System.out.println("响应状态为:" + response.getStatusLine());
			if (responseEntity != null) {
				System.out.println("响应内容长度为:" + responseEntity.getContentLength());
				System.out.println("响应内容为:" + EntityUtils.toString(responseEntity));
			}
		} catch (ClientProtocolException e) {
			e.printStackTrace();
		} catch (ParseException e) {
			e.printStackTrace();
		} catch (IOException e) {
			e.printStackTrace();
		} finally {
			try {
				// 释放资源
				if (httpClient != null) {
					httpClient.close();
				}
				if (response != null) {
					response.close();
				}
			} catch (IOException e) {
				e.printStackTrace();
			}
		}
	}

POST有参(普通参数)：

    /**
	 * POST---有参测试(普通参数)
	 *
	 * @date 2019年6月26日 
	 */
	@Test
	public void doPostTestFour() {
 
		// 获得Http客户端(可以理解为:你得先有一个浏览器;注意:实际上HttpClient与浏览器是不一样的)
		CloseableHttpClient httpClient = HttpClientBuilder.create().build();
 
		// 参数
		StringBuffer params = new StringBuffer();
		try {
			// 字符数据最好encoding以下;这样一来，某些特殊字符才能传过去(如:某人的名字就是“&”,不encoding的话,传不过去)
			params.append("name=" + URLEncoder.encode("&", "utf-8"));
			params.append("&");
			params.append("age=24");
		} catch (UnsupportedEncodingException e1) {
			e1.printStackTrace();
		}
 
		// 创建Post请求
		HttpPost httpPost = new HttpPost("http://localhost:12345/doPostControllerFour" + "?" + params);
 
		// 设置ContentType(注:如果只是传普通参数的话,ContentType不一定非要用application/json)
		httpPost.setHeader("Content-Type", "application/json;charset=utf8");
 
		// 响应模型
		CloseableHttpResponse response = null;
		try {
			// 由客户端执行(发送)Post请求
			response = httpClient.execute(httpPost);
			// 从响应模型中获取响应实体
			HttpEntity responseEntity = response.getEntity();
 
			System.out.println("响应状态为:" + response.getStatusLine());
			if (responseEntity != null) {
				System.out.println("响应内容长度为:" + responseEntity.getContentLength());
				System.out.println("响应内容为:" + EntityUtils.toString(responseEntity));
			}
		} catch (ClientProtocolException e) {
			e.printStackTrace();
		} catch (ParseException e) {
			e.printStackTrace();
		} catch (IOException e) {
			e.printStackTrace();
		} finally {
			try {
				// 释放资源
				if (httpClient != null) {
					httpClient.close();
				}
				if (response != null) {
					response.close();
				}
			} catch (IOException e) {
				e.printStackTrace();
			}
		}
	}

POST有参(对象参数)：

package com.baidu.gongyi.domain.admin.bo;

import java.util.Date;


public class User {
    //    id
    private Long id;
    //    姓名
    private String name;

    public Long getId() {
        return id;
    }

    public void setId(Long id) {
        this.id = id;
    }

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public String getUsername() {
        return username;
    }

	/**
	 * POST---有参测试(对象参数)
	 *
	 * @date 2018年7月13日 下午4:18:50
	 */
	@Test
	public void doPostTestTwo() {
 
		// 获得Http客户端(可以理解为:你得先有一个浏览器;注意:实际上HttpClient与浏览器是不一样的)
		CloseableHttpClient httpClient = HttpClientBuilder.create().build();
 
		// 创建Post请求
		HttpPost httpPost = new HttpPost("http://localhost:12345/doPostControllerTwo");
		User user = new User();
		user.setId("1");
		user.setName("阿龙");
		// 我这里利用阿里的fastjson，将Object转换为json字符串;
		// (需要导入com.alibaba.fastjson.JSON包)
		String jsonString = JSON.toJSONString(user);
 
		StringEntity entity = new StringEntity(jsonString, "UTF-8");
 
		// post请求是将参数放在请求体里面传过去的;这里将entity放入post请求体中
		httpPost.setEntity(entity);
 
		httpPost.setHeader("Content-Type", "application/json;charset=utf8");
 
		// 响应模型
		CloseableHttpResponse response = null;
		try {
			// 由客户端执行(发送)Post请求
			response = httpClient.execute(httpPost);
			// 从响应模型中获取响应实体
			HttpEntity responseEntity = response.getEntity();
 
			System.out.println("响应状态为:" + response.getStatusLine());
			if (responseEntity != null) {
				System.out.println("响应内容长度为:" + responseEntity.getContentLength());
				System.out.println("响应内容为:" + EntityUtils.toString(responseEntity));
			}
		} catch (ClientProtocolException e) {
			e.printStackTrace();
		} catch (ParseException e) {
			e.printStackTrace();
		} catch (IOException e) {
			e.printStackTrace();
		} finally {
			try {
				// 释放资源
				if (httpClient != null) {
					httpClient.close();
				}
				if (response != null) {
					response.close();
				}
			} catch (IOException e) {
				e.printStackTrace();
			}
		}
	}

POST有参(普通参数 + 对象参数)：

	/**
	 * POST---有参测试(普通参数 + 对象参数)
	 *
	 * @date 2018年7月13日 下午4:18:50
	 */
	@Test
	public void doPostTestThree() {
 
		// 获得Http客户端(可以理解为:你得先有一个浏览器;注意:实际上HttpClient与浏览器是不一样的)
		CloseableHttpClient httpClient = HttpClientBuilder.create().build();
 
		// 创建Post请求
		// 参数
		URI uri = null;
		try {
			// 将参数放入键值对类NameValuePair中,再放入集合中
			List params = new ArrayList<>();
			params.add(new BasicNameValuePair("flag", "4"));
			params.add(new BasicNameValuePair("meaning", "这是什么鬼？"));
			// 设置uri信息,并将参数集合放入uri;
			// 注:这里也支持一个键值对一个键值对地往里面放setParameter(String key, String value)
			uri = new URIBuilder().setScheme("http").setHost("localhost").setPort(12345)
					.setPath("/doPostControllerThree").setParameters(params).build();
		} catch (URISyntaxException e1) {
			e1.printStackTrace();
		}
 
		HttpPost httpPost = new HttpPost(uri);
		// HttpPost httpPost = new
		// HttpPost("http://localhost:12345/doPostControllerThree1");
 
		// 创建user参数
		User user = new User();
		user.setId("1");
		user.setName("阿龙");
		// 将user对象转换为json字符串，并放入entity中
		StringEntity entity = new StringEntity(JSON.toJSONString(user), "UTF-8");
 
		// post请求是将参数放在请求体里面传过去的;这里将entity放入post请求体中
		httpPost.setEntity(entity);
 
		httpPost.setHeader("Content-Type", "application/json;charset=utf8");
		// 响应模型
		CloseableHttpResponse response = null;
		try {
			// 由客户端执行(发送)Post请求
			response = httpClient.execute(httpPost);
			// 从响应模型中获取响应实体
			HttpEntity responseEntity = response.getEntity();
 
			System.out.println("响应状态为:" + response.getStatusLine());
			if (responseEntity != null) {
				System.out.println("响应内容长度为:" + responseEntity.getContentLength());
				System.out.println("响应内容为:" + EntityUtils.toString(responseEntity));
			}
		} catch (ClientProtocolException e) {
			e.printStackTrace();
		} catch (ParseException e) {
			e.printStackTrace();
		} catch (IOException e) {
			e.printStackTrace();
		} finally {
			try {
				// 释放资源
				if (httpClient != null) {
					httpClient.close();
				}
				if (response != null) {
					response.close();
				}
			} catch (IOException e) {
				e.printStackTrace();
			}
		}
	}

工具类

package com.arronlong.httpclientutil;

import java.io.IOException;
import java.io.OutputStream;
import java.util.ArrayList;
import java.util.List;
import java.util.Map;

import org.apache.http.Header;
import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.NameValuePair;
import org.apache.http.client.HttpClient;
import org.apache.http.client.methods.CloseableHttpResponse;
import org.apache.http.client.methods.HttpDelete;
import org.apache.http.client.methods.HttpEntityEnclosingRequestBase;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.client.methods.HttpHead;
import org.apache.http.client.methods.HttpOptions;
import org.apache.http.client.methods.HttpPatch;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.client.methods.HttpPut;
import org.apache.http.client.methods.HttpRequestBase;
import org.apache.http.client.methods.HttpTrace;
import org.apache.http.protocol.HttpContext;
import org.apache.http.util.EntityUtils;

import com.arronlong.httpclientutil.builder.HCB;
import com.arronlong.httpclientutil.common.HttpConfig;
import com.arronlong.httpclientutil.common.HttpMethods;
import com.arronlong.httpclientutil.common.HttpResult;
import com.arronlong.httpclientutil.common.Utils;
import com.arronlong.httpclientutil.exception.HttpProcessException;

/**
 * 使用HttpClient模拟发送（http/https）请求
 * 
 * @author arron
 * @version 1.0
 */
public class HttpClientUtil{
	
	//默认采用的http协议的HttpClient对象
	private static  HttpClient client4HTTP;
	
	//默认采用的https协议的HttpClient对象
	private static HttpClient client4HTTPS;
	
	static{
		try {
			client4HTTP = HCB.custom().build();
			client4HTTPS = HCB.custom().ssl().build();
		} catch (HttpProcessException e) {
			Utils.errorException("创建https协议的HttpClient对象出错：{}", e);
		}
	}
	
	/**
	 * 判定是否开启连接池、及url是http还是https 

	 * 		如果已开启连接池，则自动调用build方法，从连接池中获取client对象

	 * 		否则，直接返回相应的默认client对象

	 * 
	 * @param config		请求参数配置
	 * @throws HttpProcessException	http处理异常
	 */
	private static void create(HttpConfig config) throws HttpProcessException  {
		if(config.client()==null){//如果为空，设为默认client对象
			if(config.url().toLowerCase().startsWith("https://")){
				config.client(client4HTTPS);
			}else{
				config.client(client4HTTP);
			}
		}
	}
	
	//-----------华----丽----分----割----线--------------
	//-----------华----丽----分----割----线--------------
	//-----------华----丽----分----割----线--------------
	
	/**
	 * 以Get方式，请求资源或服务
	 * 
	 * @param client				client对象
	 * @param url					资源地址
	 * @param headers			请求头信息
	 * @param context			http上下文，用于cookie操作
	 * @param encoding		编码
	 * @return						返回处理结果
	 * @throws HttpProcessException	http处理异常 
	 */
	public static String get(HttpClient client, String url, Header[] headers, HttpContext context, String encoding) throws HttpProcessException {
		return get(HttpConfig.custom().client(client).url(url).headers(headers).context(context).encoding(encoding));
	}
	/**
	 * 以Get方式，请求资源或服务
	 * 
	 * @param config		请求参数配置
	 * @return	返回结果
	 * @throws HttpProcessException	http处理异常
	 */
	public static String get(HttpConfig config) throws HttpProcessException {
		return send(config.method(HttpMethods.GET));
	}
	
	/**
	 * 以Post方式，请求资源或服务
	 * 
	 * @param client		client对象
	 * @param url			资源地址
	 * @param headers		请求头信息
	 * @param parasMap		请求参数
	 * @param context		http上下文，用于cookie操作
	 * @param encoding		编码
	 * @return				返回处理结果
	 * @throws HttpProcessException	http处理异常 
	 */
	public static String post(HttpClient client, String url, Header[] headers, MapparasMap, HttpContext context, String encoding) throws HttpProcessException {
		return post(HttpConfig.custom().client(client).url(url).headers(headers).map(parasMap).context(context).encoding(encoding));
	}
	/**
	 * 以Post方式，请求资源或服务
	 * 
	 * @param config		请求参数配置
	 * @return				返回处理结果
	 * @throws HttpProcessException	http处理异常
	 */
	public static String post(HttpConfig config) throws HttpProcessException {
		return send(config.method(HttpMethods.POST));
	}
	
	/**
	 * 以Put方式，请求资源或服务
	 * 
	 * @param client		client对象
	 * @param url			资源地址
	 * @param parasMap		请求参数
	 * @param headers		请求头信息
	 * @param context		http上下文，用于cookie操作
	 * @param encoding		编码
	 * @return				返回处理结果
	 * @throws HttpProcessException	http处理异常 
	 */
	public static String put(HttpClient client, String url, MapparasMap,Header[] headers, HttpContext context,String encoding) throws HttpProcessException {
		return put(HttpConfig.custom().client(client).url(url).headers(headers).map(parasMap).context(context).encoding(encoding));
	}
	/**
	 * 以Put方式，请求资源或服务
	 * 
	 * @param config		请求参数配置
	 * @return				返回处理结果
	 * @throws HttpProcessException	http处理异常
	 */
	public static String put(HttpConfig config) throws HttpProcessException {
		return send(config.method(HttpMethods.PUT));
	}
	
	/**
	 * 以Delete方式，请求资源或服务
	 * 
	 * @param client		client对象
	 * @param url			资源地址
	 * @param headers		请求头信息
	 * @param context		http上下文，用于cookie操作
	 * @param encoding		编码
	 * @return				返回处理结果
	 * @throws HttpProcessException	http处理异常 
	 */
	public static String delete(HttpClient client, String url, Header[] headers, HttpContext context,String encoding) throws HttpProcessException {
		return delete(HttpConfig.custom().client(client).url(url).headers(headers).context(context).encoding(encoding));
	}
	/**
	 * 以Delete方式，请求资源或服务
	 * 
	 * @param config		请求参数配置
	 * @return				返回处理结果
	 * @throws HttpProcessException	http处理异常
	 */
	public static String delete(HttpConfig config) throws HttpProcessException {
		return send(config.method(HttpMethods.DELETE));
	}
	
	/**
	 * 以Patch方式，请求资源或服务
	 * 
	 * @param client		client对象
	 * @param url			资源地址
	 * @param parasMap		请求参数
	 * @param headers		请求头信息
	 * @param context		http上下文，用于cookie操作
	 * @param encoding		编码
	 * @return				返回处理结果
	 * @throws HttpProcessException	http处理异常 
	 */
	public static String patch(HttpClient client, String url, MapparasMap, Header[] headers, HttpContext context,String encoding) throws HttpProcessException {
		return patch(HttpConfig.custom().client(client).url(url).headers(headers).map(parasMap).context(context).encoding(encoding));
	}
	/**
	 * 以Patch方式，请求资源或服务
	 * 
	 * @param config		请求参数配置
	 * @return				返回处理结果
	 * @throws HttpProcessException	http处理异常
	 */
	public static String patch(HttpConfig config) throws HttpProcessException {
		return send(config.method(HttpMethods.PATCH));
	}
	
	/**
	 * 以Head方式，请求资源或服务
	 * 
	 * @param client		client对象
	 * @param url			资源地址
	 * @param headers		请求头信息
	 * @param context		http上下文，用于cookie操作
	 * @param encoding		编码
	 * @return				返回处理结果
	 * @throws HttpProcessException	http处理异常 
	 */
	public static String head(HttpClient client, String url, Header[] headers, HttpContext context,String encoding) throws HttpProcessException {
		return head(HttpConfig.custom().client(client).url(url).headers(headers).context(context).encoding(encoding));
	}
	/**
	 * 以Head方式，请求资源或服务
	 * 
	 * @param config		请求参数配置
	 * @return				返回处理结果
	 * @throws HttpProcessException	http处理异常
	 */
	public static String head(HttpConfig config) throws HttpProcessException {
		return send(config.method(HttpMethods.HEAD));
	}
	
	/**
	 * 以Options方式，请求资源或服务
	 * 
	 * @param client		client对象
	 * @param url			资源地址
	 * @param headers		请求头信息
	 * @param context		http上下文，用于cookie操作
	 * @param encoding		编码
	 * @return				返回处理结果
	 * @throws HttpProcessException	http处理异常 
	 */
	public static String options(HttpClient client, String url, Header[] headers, HttpContext context,String encoding) throws HttpProcessException {
		return options(HttpConfig.custom().client(client).url(url).headers(headers).context(context).encoding(encoding));
	}
	/**
	 * 以Options方式，请求资源或服务
	 * 
	 * @param config		请求参数配置
	 * @return				返回处理结果
	 * @throws HttpProcessException	http处理异常
	 */
	public static String options(HttpConfig config) throws HttpProcessException {
		return send(config.method(HttpMethods.OPTIONS));
	}
	
	/**
	 * 以Trace方式，请求资源或服务
	 * 
	 * @param client		client对象
	 * @param url			资源地址
	 * @param headers		请求头信息
	 * @param context		http上下文，用于cookie操作
	 * @param encoding		编码
	 * @return				返回处理结果
	 * @throws HttpProcessException	http处理异常 
	 */
	public static String trace(HttpClient client, String url, Header[] headers, HttpContext context, String encoding) throws HttpProcessException {
		return trace(HttpConfig.custom().client(client).url(url).headers(headers).context(context).encoding(encoding));
	}
	/**
	 * 以Trace方式，请求资源或服务
	 * 
	 * @param config		请求参数配置
	 * @return				返回处理结果
	 * @throws HttpProcessException	http处理异常
	 */
	public static String trace(HttpConfig config) throws HttpProcessException {
		return send(config.method(HttpMethods.TRACE));
	}
	
	/**
	 * 下载文件
	 * 
	 * @param client		client对象
	 * @param url			资源地址
	 * @param headers		请求头信息
	 * @param context		http上下文，用于cookie操作
	 * @param out			输出流
	 * @return				返回处理结果
	 * @throws HttpProcessException	http处理异常 
	 */
	public static OutputStream down(HttpClient client, String url, Header[] headers, HttpContext context, OutputStream out) throws HttpProcessException {
		return down(HttpConfig.custom().client(client).url(url).headers(headers).context(context).out(out));
	}
	
	/**
	 * 下载文件
	 * 
	 * @param config		请求参数配置
	 * @return				返回处理结果
	 * @throws HttpProcessException	http处理异常 
	 */
	public static OutputStream down(HttpConfig config) throws HttpProcessException {
		if(config.method() == null) {
			config.method(HttpMethods.GET);
		}
		return fmt2Stream(execute(config), config.out());
	}
	
	/**
	 * 上传文件
	 * 
	 * @param client		client对象
	 * @param url			资源地址
	 * @param headers		请求头信息
	 * @param context		http上下文，用于cookie操作
	 * @return				返回处理结果
	 * @throws HttpProcessException	http处理异常 
	 */
	public static String upload(HttpClient client, String url, Header[] headers, HttpContext context) throws HttpProcessException {
		return upload(HttpConfig.custom().client(client).url(url).headers(headers).context(context));
	}
	
	/**
	 * 上传文件
	 * 
	 * @param config		请求参数配置
	 * @return				返回处理结果
	 * @throws HttpProcessException	http处理异常 
	 */
	public static String upload(HttpConfig config) throws HttpProcessException {
		if(config.method() != HttpMethods.POST  && config.method() != HttpMethods.PUT){
			config.method(HttpMethods.POST);
		}
		return send(config);
	}
	
	/**
	 * 查看资源链接情况，返回状态码
	 * 
	 * @param client		client对象
	 * @param url			资源地址
	 * @param headers		请求头信息
	 * @param context		http上下文，用于cookie操作
	 * @return				返回处理结果
	 * @throws HttpProcessException	http处理异常 
	 */
	public static int status(HttpClient client, String url, Header[] headers, HttpContext context, HttpMethods method) throws HttpProcessException {
		return status(HttpConfig.custom().client(client).url(url).headers(headers).context(context).method(method));
	}
	
	/**
	 * 查看资源链接情况，返回状态码
	 * 
	 * @param config		请求参数配置
	 * @return				返回处理结果
	 * @throws HttpProcessException	http处理异常 
	 */
	public static int status(HttpConfig config) throws HttpProcessException {
		return fmt2Int(execute(config));
	}

	//-----------华----丽----分----割----线--------------
	//-----------华----丽----分----割----线--------------
	//-----------华----丽----分----割----线--------------
	
	/**
	 * 请求资源或服务
	 * 
	 * @param config		请求参数配置
	 * @return				返回处理结果
	 * @throws HttpProcessException	http处理异常
	 */
	public static String send(HttpConfig config) throws HttpProcessException {
		return fmt2String(execute(config), config.outenc());
	}
	
	/**
	 * 请求资源或服务，返回HttpResult对象
	 * 
	 * @param config		请求参数配置
	 * @return				返回HttpResult处理结果
	 * @throws HttpProcessException	http处理异常
	 */
	public static HttpResult sendAndGetResp(HttpConfig config) throws HttpProcessException {
		Header[] reqHeaders = config.headers();
		//执行结果
		HttpResponse resp =  execute(config);
		
		HttpResult result = new HttpResult(resp);
		result.setResult(fmt2String(resp, config.outenc()));
		result.setReqHeaders(reqHeaders);
		
		return result;
	}
	
	/**
	 * 请求资源或服务
	 * 
	 * @param config		请求参数配置
	 * @return				返回HttpResponse对象
	 * @throws HttpProcessException	http处理异常 
	 */
	private static HttpResponse execute(HttpConfig config) throws HttpProcessException {
		create(config);//获取链接
		HttpResponse resp = null;

		try {
			//创建请求对象
			HttpRequestBase request = getRequest(config.url(), config.method());
			
			//设置超时
			request.setConfig(config.requestConfig());
			
			//设置header信息
			request.setHeaders(config.headers());
			
			//判断是否支持设置entity(仅HttpPost、HttpPut、HttpPatch支持)
			if(HttpEntityEnclosingRequestBase.class.isAssignableFrom(request.getClass())){
				List nvps = new ArrayList();
				
				if(request.getClass()==HttpGet.class) {
					//检测url中是否存在参数
					//注：只有get请求，才自动截取url中的参数，post等其他方式，不再截取
					config.url(Utils.checkHasParas(config.url(), nvps, config.inenc()));
				}
				
				//装填参数
				HttpEntity entity = Utils.map2HttpEntity(nvps, config.map(), config.inenc());
				
				//设置参数到请求对象中
				((HttpEntityEnclosingRequestBase)request).setEntity(entity);
				
				Utils.info("请求地址："+config.url());
				if(nvps.size()>0){
					Utils.info("请求参数："+nvps.toString());
				}
				if(config.json()!=null){
					Utils.info("请求参数："+config.json());
				}
			}else{
				int idx = config.url().indexOf("?");
				Utils.info("请求地址："+config.url().substring(0, (idx>0 ? idx : config.url().length())));
				if(idx>0){
					Utils.info("请求参数："+config.url().substring(idx+1));
				}
			}
			//执行请求操作，并拿到结果（同步阻塞）
			resp = (config.context()==null)?config.client().execute(request) : config.client().execute(request, config.context()) ;

			if(config.isReturnRespHeaders()){
				//获取所有response的header信息
				config.headers(resp.getAllHeaders());
			}
			
			//获取结果实体
			return resp;
			
		} catch (IOException e) {
			throw new HttpProcessException(e);
		}
	}
	
	//-----------华----丽----分----割----线--------------
	//-----------华----丽----分----割----线--------------
	//-----------华----丽----分----割----线--------------
	
	/**
	 * 转化为字符串
	 * 
	 * @param resp			响应对象
	 * @param encoding		编码
	 * @return				返回处理结果
	 * @throws HttpProcessException	http处理异常 
	 */
	private static String fmt2String(HttpResponse resp, String encoding) throws HttpProcessException {
		String body = "";
		try {
			if (resp.getEntity() != null) {
				// 按指定编码转换结果实体为String类型
				body = EntityUtils.toString(resp.getEntity(), encoding);
				Utils.info(body);
			}else{//有可能是head请求
				body =resp.getStatusLine().toString();
			}
			EntityUtils.consume(resp.getEntity());
		} catch (IOException e) {
			throw new HttpProcessException(e);
		}finally{			
			close(resp);
		}
		return body;
	}
	
	/**
	 * 转化为数字
	 * 
	 * @param resp			响应对象
	 * @return				返回处理结果
	 * @throws HttpProcessException	http处理异常 
	 */
	private static int fmt2Int(HttpResponse resp) throws HttpProcessException {
		int statusCode;
		try {
			statusCode = resp.getStatusLine().getStatusCode();
			EntityUtils.consume(resp.getEntity());
		} catch (IOException e) {
			throw new HttpProcessException(e);
		}finally{			
			close(resp);
		}
		return statusCode;
	}
	
	/**
	 * 转化为流
	 * 
	 * @param resp			响应对象
	 * @param out			输出流
	 * @return				返回输出流
	 * @throws HttpProcessException	http处理异常 
	 */
	public static OutputStream fmt2Stream(HttpResponse resp, OutputStream out) throws HttpProcessException {
		try {
			resp.getEntity().writeTo(out);
			EntityUtils.consume(resp.getEntity());
		} catch (IOException e) {
			throw new HttpProcessException(e);
		}finally{
			close(resp);
		}
		return out;
	}
	
	/**
	 * 根据请求方法名，获取request对象
	 * 
	 * @param url			资源地址
	 * @param method		请求方式
	 * @return				返回Http处理request基类
	 */
	private static HttpRequestBase getRequest(String url, HttpMethods method) {
		HttpRequestBase request = null;
		switch (method.getCode()) {
			case 0:// HttpGet
				request = new HttpGet(url);
				break;
			case 1:// HttpPost
				request = new HttpPost(url);
				break;
			case 2:// HttpHead
				request = new HttpHead(url);
				break;
			case 3:// HttpPut
				request = new HttpPut(url);
				break;
			case 4:// HttpDelete
				request = new HttpDelete(url);
				break;
			case 5:// HttpTrace
				request = new HttpTrace(url);
				break;
			case 6:// HttpPatch
				request = new HttpPatch(url);
				break;
			case 7:// HttpOptions
				request = new HttpOptions(url);
				break;
			default:
				request = new HttpPost(url);
				break;
		}
		return request;
	}
	
	/**
	 * 尝试关闭response
	 * 
	 * @param resp				HttpResponse对象
	 */
	private static void close(HttpResponse resp) {
		try {
			if(resp == null) return;
			//如果CloseableHttpResponse 是resp的父类，则支持关闭
			if(CloseableHttpResponse.class.isAssignableFrom(resp.getClass())){
				((CloseableHttpResponse)resp).close();
			}
		} catch (IOException e) {
			Utils.exception(e);
		}
	}
}

本文参考https://blog.csdn.net/justry_deng/article/details/81042379，自己也去试这写了的么很不错