SpringMVC 菜鸟教程 3 文件上传 CommonsMultipartResolver

CommonsMultipartResolverUploadController

package com.jege.spring.mvc;

import java.io.File;
import java.util.Iterator;

import javax.servlet.http.HttpServletRequest;

import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.multipart.MultipartFile;
import org.springframework.web.multipart.MultipartHttpServletRequest;
import org.springframework.web.multipart.commons.CommonsMultipartResolver;

@Controller
public class CommonsMultipartResolverUploadController{
// http://localhost:8080/upload 
@RequestMapping(value = "/upload", method = RequestMethod.GET)
public String uploadGet() {
System.out.println("先以get的请求方式显示上传页面");
return "upload";
}

int i = 0;// 简单改变上传文件的名字

@RequestMapping(value = "/upload", method = RequestMethod.POST)
public String uploadPost(HttpServletRequest request) throws Exception {
System.out.println("在以post请求方式处理上传的请求");

// 记录开始上传文件的时间
long startTime = System.currentTimeMillis();

String webapp = request.getServletContext().getRealPath("/upload");
System.out.println("上传文件保存到服务器webapp的路径:" + webapp);

// 存放文件的路径
File deskFile = new File(webapp, "eclipse.zip");
System.out.println("上传文件存放的最终路径：" + deskFile.getAbsolutePath());

// 将当前上下文初始化给 CommonsMutipartResolver:配置上传文件解析器
CommonsMultipartResolver multipartResolver = new CommonsMultipartResolver(request.getSession().getServletContext());
// 检查form中是否有enctype="multipart/form-data"，即是是否有文件上传
if (multipartResolver.isMultipart(request)) {
// 将request变成多部件MultipartHttpServletRequest
MultipartHttpServletRequest multiRequest = (MultipartHttpServletRequest) request;
// 获取multiRequest 中所有的文件名
Iterator<String> iter = multiRequest.getFileNames();
// 遍历所有文件
while (iter.hasNext()) {
MultipartFile file = multiRequest.getFile(iter.next());
if (file != null) {// 处理上传
file.transferTo(deskFile);
}
}
}

// 添加提示信息
request.setAttribute("msg", "上传成功");

// 记录结束上传文件的时间
long endTime = System.currentTimeMillis();
System.out.println("上传究竟用了多少时间：" + String.valueOf(endTime - startTime) + "ms");

// 直接转发到upload.jsp
return "upload";
}

}

上传300MB文件耗时比较

其他关联项目

源码地址