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