java spring文件上传

需要这两个包

commons-fileupload-1.2.2.jar

commons-io-2.4.jar

1、控制器内的

package cn.mvc.controller;

import java.io.File;
import java.io.IOException;

import javax.servlet.http.HttpServletRequest;

import org.apache.commons.io.FilenameUtils;
import org.apache.commons.lang.math.RandomUtils;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.multipart.MultipartFile;

@Controller
public class FileUploadController {
   @RequestMapping(value="/fileUpload",method=RequestMethod.POST)
   public String fileUpload(@RequestParam(value="attr",required=false) MultipartFile[] attrs,HttpServletRequest request){
       MultipartFile attr =null;
       for(int i =0;i<attrs.length;i++){
           attr=attrs[i];
           if(!attr.isEmpty()){
               //获取原文件名称
               String oldFilename=attr.getOriginalFilename();
               //获取原文件的后缀 oldFilename.split(".")[oldFilename.split(".").length-1]
               String sufix =FilenameUtils.getExtension(oldFilename);
               String path =request.getSession().getServletContext().getRealPath("static"+File.separator+"uploadFile");
               int fileSize=500000;
               if(attr.getSize()>fileSize){
                   //文件超出规定的大小
                   request.setAttribute("error", "文件超出规定的大小");
               }else if(sufix.equalsIgnoreCase("jpg")||sufix.equalsIgnoreCase("png")||sufix.equalsIgnoreCase("jpeg")){
                   String fileName =System.currentTimeMillis()+RandomUtils.nextInt(10000000)+"_user.jpg";
                   File targeFile = new File(path,fileName);
                   if(!targeFile.exists()){
                       targeFile.mkdirs();
                   }
                   try {
                       attr.transferTo(targeFile);
                   } catch (Exception e) {
                       request.setAttribute("error", "文件上传错误");
                       e.printStackTrace();
                   }
               }else{
                   request.setAttribute("error", "文件格式错误");
               }
           }
       }
       return "user/list";
   }
}

2、spring-servlet.xml内的

<bean id="multipartResolver" class="org.springframework.web.multipart.commons.CommonsMultipartResolver">
       <property name="maxUploadSize" value="500000"></property>
       <property name="defaultEncoding" value="UTF-8"></property>

</bean>

java spring文件上传

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