SpringMVC上传文件FileUpload

我是在已经搭建好的springMVC环境下，maven工程中的pom.xml所需要的jar包（其中spring上传文件的两个主要jar：commons-fileupload.jar和commons-io.jar）：

<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"    xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">    <modelVersion>4.0.0</modelVersion>    <groupId>com.zhihua</groupId>    <artifactId>SpringMVC_FileUpload</artifactId>    <packaging>war</packaging>    <version>0.0.1-SNAPSHOT</version>    <name>SpringMVC_FileUpload Maven Webapp</name>    <url>http://maven.apache.org</url>    <properties>        <!-- spring版本号 -->        <spring.version>3.2.8.RELEASE</spring.version>        <!-- junit版本号 -->        <junit.version>4.10</junit.version>    </properties>    <dependencies>        <dependency>            <groupId>junit</groupId>            <artifactId>junit</artifactId>            <version>3.8.1</version>            <scope>test</scope>        </dependency>        <!-- springMVC上传文件依赖 -->        <dependency>            <groupId>commons-fileupload</groupId>            <artifactId>commons-fileupload</artifactId>            <version>1.3.1</version>        </dependency>        <!-- 添加Spring依赖 -->        <dependency>            <groupId>org.springframework</groupId>            <artifactId>spring-core</artifactId>            <version>${spring.version}</version>        </dependency>        <dependency>            <groupId>org.springframework</groupId>            <artifactId>spring-webmvc</artifactId>            <version>${spring.version}</version>        </dependency>        <dependency>            <groupId>org.springframework</groupId>            <artifactId>spring-context</artifactId>            <version>${spring.version}</version>        </dependency>        <dependency>            <groupId>org.springframework</groupId>            <artifactId>spring-context-support</artifactId>            <version>${spring.version}</version>        </dependency>        <dependency>            <groupId>org.springframework</groupId>            <artifactId>spring-aop</artifactId>            <version>${spring.version}</version>        </dependency>        <dependency>            <groupId>org.springframework</groupId>            <artifactId>spring-aspects</artifactId>            <version>${spring.version}</version>        </dependency>        <dependency>            <groupId>org.springframework</groupId>            <artifactId>spring-tx</artifactId>            <version>${spring.version}</version>        </dependency>        <dependency>            <groupId>org.springframework</groupId>            <artifactId>spring-jdbc</artifactId>            <version>${spring.version}</version>        </dependency>        <dependency>            <groupId>org.springframework</groupId>            <artifactId>spring-web</artifactId>            <version>${spring.version}</version>        </dependency>        <!--spring单元测试依赖 -->        <dependency>            <groupId>org.springframework</groupId>            <artifactId>spring-test</artifactId>            <version>${spring.version}</version>            <scope>test</scope>        </dependency>        <!-- jstl标签支持 -->        <dependency>            <groupId>jstl</groupId>            <artifactId>jstl</artifactId>            <version>1.2</version>        </dependency>        <!-- Servlet核心包 -->        <dependency>            <groupId>javax.servlet</groupId>            <artifactId>javax.servlet-api</artifactId>            <version>3.0.1</version>            <scope>provided</scope>        </dependency>        <!--JSP -->        <dependency>            <groupId>javax.servlet.jsp</groupId>            <artifactId>jsp-api</artifactId>            <version>2.1</version>            <scope>provided</scope>        </dependency>    </dependencies>    <build>        <finalName>SpringMVC_FileUpload</finalName>    </build></project>

在spring-mvc.xml中添加代码：

<!-- springMVC上传文件时，需要配置MultipartResolver处理器 -->    <bean id="multipartResolver"         class="org.springframework.web.multipart.commons.CommonsMultipartResolver">        <property name="defaultEncoding" value="utf-8"></property>        <property name="maxUploadSize" value="10485760000"></property>        <property name="maxInMemorySize" value="40960"></property>    </bean>

前端页面（fileUpload.jsp）和上传成功返回页面（success.jsp）:

<%@ page language="java" contentType="text/html; charset=UTF-8"    pageEncoding="UTF-8"%><%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %><!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"><html><head><meta http-equiv="Content-Type" content="text/html; charset=UTF-8"><title>springmvc-文件上传</title></head><body>    <h1>采用流的方式上传文件</h1>    <form name="form1" action="<c:url value='/fileUpload/upload_01'/>" method="post" enctype="multipart/form-data">        <input type="file" name="file_01"/>        <input type="submit" value="fileupload"/>    </form>    <br>    <h1>采用multipart提供的file.transfer方法上传文件1</h1>    <form name="form2" action="<c:url value='/fileUpload/upload_02'/>" method="post" enctype="multipart/form-data">        <input type="file" name="file_02"/>        <input type="submit" value="fileupload"/>    </form>    <br>    <h1>采用multipart提供的file.transfer方法上传文件2</h1>    <form name="form2" action="<c:url value='/fileUpload/upload_03'/>" method="post" enctype="multipart/form-data">        <input type="file" name="file_03"/>        <input type="submit" value="fileupload"/>    </form>    <br>    <h1>使用spring MVC提供的方法上传文件</h1>    <form name="form2" action="<c:url value='/fileUpload/upload_spring'/>" method="post" enctype="multipart/form-data">        <input type="file" name="file_03"/>        <input type="submit" value="fileupload"/>    </form></body></html>

<%@ page language="java" contentType="text/html; charset=UTF-8"    pageEncoding="UTF-8"%><!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"><html><head><meta http-equiv="Content-Type" content="text/html; charset=UTF-8"><title>Insert title here</title></head><body>    <h2>文件上传成功！</h2></body></html>

controller 的代码：

package com.zhihua.controller;import java.io.File;import java.io.FileOutputStream;import java.io.IOException;import java.io.InputStream;import java.io.OutputStream;import java.util.Date;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.RequestParam;import org.springframework.web.multipart.MultipartFile;import org.springframework.web.multipart.MultipartHttpServletRequest;import org.springframework.web.multipart.commons.CommonsMultipartFile;import org.springframework.web.multipart.commons.CommonsMultipartResolver;@Controller@RequestMapping("/fileUpload")public class FileUploadController {    /**     * 通过流的方式上传文件     * @RequestParam("file") 将name=file控件得到的文件封装成CommonsMultipartFile 对象     * <请替换成功能描述> <br>     * <请替换成详细描述>     * @param file     * @return     * @author caizh     * @since [1.0.0]     * @version [1.0.0,2017年2月5日]     */    @RequestMapping("/upload_01")        public String fileUpload_1(@RequestParam("file_01")CommonsMultipartFile file)throws IOException {        //用来检测程序运行时间        long startTime = System.currentTimeMillis();        System.out.println("fileName:"+file.getOriginalFilename());        try{            //获取输出流            OutputStream os = new FileOutputStream("E:/"+new Date().getTime()+file.getOriginalFilename());            //获取输入流CommonsMultipartFile中可以直接得到文件的流            InputStream is = file.getInputStream();            int temp;            //一个一个字节的读取并写入            while((temp=is.read())!=(-1)){                os.write(temp);            }            os.flush();            os.close();            is.close();        }catch(Exception e){            e.printStackTrace();        }        long endTime = System.currentTimeMillis();        System.out.println("方法一的运行时间："+String.valueOf(endTime-startTime)+"ms");        return "view/success";    }    /**     * 采用file.Transto 来保存上传的文件     * <请替换成功能描述> <br>     * <请替换成详细描述>     * @param file     * @return     * @throws IOException     * @author caizh     * @since [1.0.0]     * @version [1.0.0,2017年2月5日]     */    @RequestMapping("/upload_02")    public String fileUpload_2(@RequestParam("file_02") CommonsMultipartFile file)throws IOException {        long startTime = System.currentTimeMillis();        System.out.println("fileName:"+file.getOriginalFilename());        String path = "E:/"+new Date().getTime()+file.getOriginalFilename();        File newFile = new File(path);        //通过CommonsMultipartFile 的方法直接写文件        file.transferTo(newFile);        long endTime = System.currentTimeMillis();        System.out.println("方法二的运行时间："+String.valueOf(endTime-startTime)+"ms");        return "view/success";           }    /**     * 使用MultipartFile上传文件     * <请替换成功能描述> <br>     * <请替换成详细描述>     * @param file     * @return     * @author caizh     * @since [1.0.0]     * @version [1.0.0,2017年2月5日]     */    @RequestMapping("/upload_03")    public String fileUpload_3(@RequestParam(value="file_03",required=false)MultipartFile file,            HttpServletRequest request){        String path = request.getSession().getServletContext().getRealPath("upload");        System.out.println(path);        String fileName = file.getOriginalFilename();        File targetFile = new File(path,fileName);        if(!targetFile.exists()){            targetFile.mkdirs();        }        //保存        try {            file.transferTo(targetFile);        }catch(Exception e){            e.printStackTrace();        }        return "view/success";    }    /**     * 采用spring提供的上传文件的方法     * <请替换成功能描述> <br>     * <请替换成详细描述>     * @param request     * @return     * @throws IllegalStateException     * @throws IOException     * @author caizh     * @since [1.0.0]     * @version [1.0.0,2017年2月5日]     */    @RequestMapping("/upload_spring")    public String springUpload(HttpServletRequest request)throws IllegalStateException, IOException{        long startTime = System.currentTimeMillis();        //将当前上下文初始化给 CommonsMutipartResolver (多部分解析器)        CommonsMultipartResolver multipartResolver = new CommonsMultipartResolver(request.getSession().getServletContext());        //检查form中是否有enctype="multipart/form-data"        if(multipartResolver.isMultipart(request))        {            //将request变成多request            MultipartHttpServletRequest multiRequest = (MultipartHttpServletRequest)request;            //获取multiRequest中所有的文件名            Iterator iter = multiRequest.getFileNames();            while(iter.hasNext()){                //一次遍历所有的文件                MultipartFile file = multiRequest.getFile(iter.next().toString());                if(file!=null){                    String path = "E:/springUpload"+file.getOriginalFilename();                    //上传                    file.transferTo(new File(path));                }            }        }        long endTime = System.currentTimeMillis();        System.out.println("方法三的运行时间："+String.valueOf(endTime-startTime)+"ms");                return "view/success";    }}

好了，全部代码都给出了，博主是测试成功了，感兴趣的朋友可以去比较不同上传方式的效率！