java实现图片上传

1.首先上html的代码

 

   

   

   

       

     

   

 

 

 

    上传图片 

   

   

   

 

2.在看接口

3.接口内容

package com.st.controller.system;

import java.io.File;

import java.io.IOException;

import java.io.PrintWriter;

import java.text.SimpleDateFormat;

import java.util.Map;

import java.util.logging.Logger;

import javax.servlet.http.HttpServletRequest;

import javax.servlet.http.HttpServletResponse;

import net.sf.json.JSONObject;

import org.springframework.stereotype.Controller;

import org.springframework.util.FileCopyUtils;

import org.springframework.web.bind.annotation.RequestMapping;

import org.springframework.web.multipart.MultipartFile;

import org.springframework.web.multipart.MultipartHttpServletRequest;

import com.st.controller.base.BaseController;

import com.st.util.DateUtil;

/**

*

* @author wy

*

*/

@Controller

public class FileUpController extends BaseController {

Logger logger = Logger.getLogger(FileUpController.class.getName());

/**

* 处理文件上传

* @param response

* @param request

* @return

* @throws IOException

*/

@RequestMapping(value="fileUp") 

public void upload(HttpServletResponse response,HttpServletRequest request) throws IOException{

logger.info("处理文件上传");

response.setCharacterEncoding("utf-8");

MultipartHttpServletRequest multipartRequest = (MultipartHttpServletRequest) request;

  Map fileMap = multipartRequest.getFileMap();   

  //String savePath = this.getServletConfig().getServletContext().getRealPath("");       

  //savePath = savePath + "/uploads/";

  // 文件保存路径  ctxPath本地路径

  SimpleDateFormat sdf = new SimpleDateFormat("yyyyMM"); 

  //String ymd = sdf.format(new Date());  +File.separator+"uploadFiles/czy"

  String savefile = request.getParameter("savePath");

  String replace = request.getParameter("replace");

  String ctxPath=request.getSession().getServletContext().getRealPath("/");

  String allpath = request.getRequestURL().toString();

  String all[] = allpath.split("fileUp");

  String currpath = all[0];

  System.out.println("currpath="+currpath+savefile);

  if("1".equals(replace)){//1替换项目名

  String a= ctxPath.replace("SellingTea","productImg");

  ctxPath =a;

  System.out.println("路径1" + ctxPath);   

  }else{

  ctxPath=request.getSession().getServletContext().getRealPath("/")+savefile+"\\";

  }

  // ctxPath=request.getSession().getServletContext().getRealPath("/")+File.separator+"uploadFiles/czy";

// ctxPath += File.separator + ymd + File.separator; 

  ctxPath += File.separator; 

  System.out.println("ctxpath="+ctxPath);

  // 创建文件夹 

  File file = new File(ctxPath);   

  if (!file.exists()) {   

  file.mkdirs();   

  }

  String fileName = null;   

  for (Map.Entry entity : fileMap.entrySet()) {   

  // 上传文件 

  MultipartFile mf = entity.getValue(); 

  fileName = mf.getOriginalFilename();

  //获取原文件名 

  System.out.println("filename="+fileName);

  String realNmae=DateUtil.getDteStr()+"@"+ fileName;

  File uploadFile = new File(ctxPath +realNmae);

  try { 

  FileCopyUtils.copy(mf.getBytes(), uploadFile); 

  JSONObject json=new JSONObject();

  json.put("sendName", fileName);

  json.put("realNmae", realNmae);

  json.put("path", currpath+savefile+"/"+realNmae);

  System.out.println("path="+ctxPath+realNmae);

  PrintWriter pw =response.getWriter();

  pw.print(json);

  pw.close();

      System.out.println("上传成功");   

  } catch (IOException e) {   

  System.out.println("上传失败");       

      e.printStackTrace();       

  }

  } 

      }

}

4.效果图