FileUploadController.java

package com.controller;

import com.sun.jersey.api.client.Client;
import com.sun.jersey.api.client.WebResource;
import org.apache.commons.fileupload.FileItem;
import org.apache.commons.fileupload.disk.DiskFileItemFactory;
import org.apache.commons.fileupload.servlet.ServletFileUpload;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.multipart.MultipartFile;

import javax.servlet.http.HttpServletRequest;
import java.io.File;
import java.util.List;
import java.util.UUID;

@Controller
@RequestMapping("/fileUpload")
public class FileUploadController {
	
	//传统文件上传(使用fileupload组件完成文件上传,common-fileupload.jar和common-io.jar)
 @RequestMapping("/fileupload1")
 public String fileuoload1(HttpServletRequest request) throws Exception {
 System.out.println("文件上传...");
 String path = request.getSession().getServletContext().getRealPath("/uploads/");//上传的位置
 File file = new File(path);//判断，该路径是否存在
 if(!file.exists()){
 file.mkdirs();//如果不存在，则创建该文件夹
 }
 //解析request对象，获取上传文件项
 DiskFileItemFactory factory = new DiskFileItemFactory();
 ServletFileUpload upload = new ServletFileUpload(factory);
 //解析request
 List<FileItem> items = upload.parseRequest(request);
 for(FileItem item:items){//遍历 
 if(item.isFormField()){// 进行判断，当前item对象是否是上传文件项
 //说明普通表单向
 }else{
 //说明上传文件项
 String filename = item.getName().substring(item.getName().lastIndexOf("\\") + 1);//获取上传文件的名称
 String uuid = UUID.randomUUID().toString().replace("-", "");//把文件的名称设置唯一值，uuid
 filename = uuid+"_"+filename;
 item.write(new File(path,filename));//完成文件上传
 item.delete();//删除临时文件
 }
 }
 return "success";
 }

 //SpringMVC文件上传
 @RequestMapping("/fileupload2")
 public String fileuoload2(HttpServletRequest request, MultipartFile upload) throws Exception {//MultipartFile upload的upload必须与表单file类型的input的name一致
 System.out.println("SpringMVC文件上传...");
 //使用fileupload组件完成文件上传
 String path = request.getSession().getServletContext().getRealPath("/uploads/");//上传的位置
 File file = new File(path);
 if(!file.exists()){//判断，该路径是否存在
 file.mkdirs();//若不存在，则创建该文件夹
 }
 String filename = upload.getOriginalFilename();//获取上传文件的名称
 String uuid = UUID.randomUUID().toString().replace("-", "");//把文件的名称设置唯一值，uuid
 filename = uuid+"_"+filename;
 upload.transferTo(new File(path,filename));//完成文件上传

 return "success";
 }

 //SpringMVC跨服务器文件上传
 @RequestMapping("/fileupload3")
 public String fileuoload3(MultipartFile upload) throws Exception {
 System.out.println("跨服务器文件上传...");
 //定义上传文件服务器路径(这是新开启的本地服务器，模拟跨服务器的模式)
 String path = "http://localhost:9090/uploads/";//新tomcat服务器参数：HTTP prot:9090, JMX port:1090
 String filename = upload.getOriginalFilename();//获取上传文件的名称
 String uuid = UUID.randomUUID().toString().replace("-", "");//把文件的名称设置唯一值，uuid
 filename = uuid+"_"+filename;
 
 Client client = Client.create();//创建客户端的对象
 WebResource webResource = client.resource(path + filename);//和图片服务器进行连接
 webResource.put(upload.getBytes());//上传文件;目前没有uploads文件，代码里也没自动创建，因此需手动创建，否则409错误

 return "success";
 }
}