springMVC系列之文件上传——06

浏览数：33 / 时间：2015年06月09日

springMVC系列之文件上传——06

摘要：web开发、文件上传就像我们平时吃饭一样、少不了的功能。本文主要实现springMVC的两种实现方式：通过参数传递上传文件、通过解析request上传文件、强推后面一种。

一：实现功能

1、通过参数传递形式上传文件

2、通过解析request上传文件

二：具体步骤

1、引入jar包、主要是两个

2、不管是那种方式、首先要在springMVC的配置文件中配置有管springMVC对上传文件的处理的类springAnnotation-servlet.xml关于文件处理配置：

	<!-- 配置springMVC处理上传文件的信息 -->
	<bean id="multipartResolver"
		class="org.springframework.web.multipart.commons.CommonsMultipartResolver">
		<property name="defaultEncoding" value="utf-8" />
		<property name="maxUploadSize" value="10485760000" />
		<property name="maxInMemorySize" value="40960" />
	</bean>

3、参数传递（详细信息代码有说明）：

	/**
	 * 参数接收形式上传文件
	 */
	@RequestMapping("/upload")
	public String uploadFile(@RequestParam("file") CommonsMultipartFile file,
			HttpServletRequest request) throws IOException {
		System.out.println("fileName : " + file.getOriginalFilename());

		if (!file.isEmpty()) {
			BufferedOutputStream bos = new BufferedOutputStream(
					new FileOutputStream("D:/" + file.getOriginalFilename()));
			InputStream in = file.getInputStream();
			BufferedInputStream bis = new BufferedInputStream(in);
			int n = 0;
			byte[] b = new byte[1024];
			while ((n = bis.read(b)) != -1) {
				bos.write(b, 0, n);
			}
			bos.flush();
			bos.close();
			bis.close();
		}
		return "/success";
	}

4、解析request（详细信息代码有说明）：

	/**
	 * springMVC封装的解析request上传文件（快捷、与springMVC很好结合，首选）
	 */
	@RequestMapping("/upload2")
	public String uploadFile2(@RequestParam("file") CommonsMultipartFile file,
			HttpServletRequest request) throws IOException {
		// 定义解析器去解析request
		CommonsMultipartResolver mutilpartResolver = new CommonsMultipartResolver(request.getSession().getServletContext());
		//request如果是Multipart类型、
		if (mutilpartResolver.isMultipart(request)) {
			//强转成 MultipartHttpServletRequest
			MultipartHttpServletRequest multiRequest = (MultipartHttpServletRequest) request;
			//获取文件名
			Iterator<String> it = multiRequest.getFileNames();
			while (it.hasNext()) {
				//获取MultipartFile类型文件
				MultipartFile fileDetail = multiRequest.getFile(it.next());
				if (fileDetail != null) {
					String fileName = "demoUpload" + fileDetail.getOriginalFilename();
					String path = "D:/" + fileName;
					File localFile = new File(path);
					//将上传文件写入到指定文件出、核心！
					fileDetail.transferTo(localFile);
					//非常重要、有了这个想做什么处理都可以
					//fileDetail.getInputStream();
				}
			}
		}
		return "/success";
	}

补充

1、整体结构图及jar包图

2、具体页面、Controller、springAnnotation-servlet.xml（嫌烦可无视）

a）上传页面 upload.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>
<script type="text/javascript" src="../js/jquery-1.7.1.min.js"></script>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>上传文件</title>
<script type="text/javascript">

</script>
</head>
<body>
	<h4>上传文件1</h4>
	<form name="userForm" action="/springMVC7/file/upload2" method="post" enctype="multipart/form-data" >
		选择文件：<input type="file" name="file">
				 <input type="submit" value="上传" >
	</form>
</body>
</html>

b）配置文件 springAnnotation-servlet.xml

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
	xmlns:context="http://www.springframework.org/schema/context" xmlns:p="http://www.springframework.org/schema/p"
	xmlns:mvc="http://www.springframework.org/schema/mvc" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
	xsi:schemaLocation="http://www.springframework.org/schema/beans  
      http://www.springframework.org/schema/beans/spring-beans-3.0.xsd  
      http://www.springframework.org/schema/context  
      http://www.springframework.org/schema/context/spring-context.xsd  
      http://www.springframework.org/schema/mvc  
      http://www.springframework.org/schema/mvc/spring-mvc-3.0.xsd">


	<!-- 注解扫描包 -->
	<context:component-scan base-package="com.chy.web.controller.annotation"></context:component-scan>

	<!-- 优化一：使用mvc标签的代替下面的两个bean -->
	<mvc:annotation-driven />
	<!-- 不拦截静态资源 -->
	<mvc:default-servlet-handler />

	<!-- 开启注解 <bean class="org.springframework.web.servlet.mvc.annotation.DefaultAnnotationHandlerMapping"></bean> 
		<bean class="org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter"></bean> -->

	<bean id="viewResolver"
		class="org.springframework.web.servlet.view.InternalResourceViewResolver">
		<property name="prefix" value="/"></property>
		<property name="suffix" value=".jsp"></property>
	</bean>

	<!-- 配置springMVC处理上传文件的信息 -->
	<bean id="multipartResolver"
		class="org.springframework.web.multipart.commons.CommonsMultipartResolver">
		<property name="defaultEncoding" value="utf-8" />
		<property name="maxUploadSize" value="10485760000" />
		<property name="maxInMemorySize" value="40960" />
	</bean>
</beans>

c）处理上传文件的类 UploadController

package com.chy.web.controller.annotation.upload;

import java.io.BufferedInputStream;
import java.io.BufferedOutputStream;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
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("/file")
public class UploadController {
	/*
	 * 上传文件的两种方法、 1、一种用参数接收 2、解析request
	 */

	/**
	 * 参数接收形式上传文件
	 */
	@RequestMapping("/upload")
	public String uploadFile(@RequestParam("file") CommonsMultipartFile file,
			HttpServletRequest request) throws IOException {
		System.out.println("fileName : " + file.getOriginalFilename());

		if (!file.isEmpty()) {
			BufferedOutputStream bos = new BufferedOutputStream(
					new FileOutputStream("D:/" + file.getOriginalFilename()));
			InputStream in = file.getInputStream();
			BufferedInputStream bis = new BufferedInputStream(in);
			int n = 0;
			byte[] b = new byte[1024];
			while ((n = bis.read(b)) != -1) {
				bos.write(b, 0, n);
			}
			bos.flush();
			bos.close();
			bis.close();
		}
		return "/success";
	}

	/**
	 * springMVC封装的解析request上传文件（快捷、与springMVC很好结合，首选）
	 */
	@RequestMapping("/upload2")
	public String uploadFile2(@RequestParam("file") CommonsMultipartFile file,
			HttpServletRequest request) throws IOException {
		// 定义解析器去解析request
		CommonsMultipartResolver mutilpartResolver = new CommonsMultipartResolver(request.getSession().getServletContext());
		//request如果是Multipart类型、
		if (mutilpartResolver.isMultipart(request)) {
			//强转成 MultipartHttpServletRequest
			MultipartHttpServletRequest multiRequest = (MultipartHttpServletRequest) request;
			//获取文件名
			Iterator<String> it = multiRequest.getFileNames();
			while (it.hasNext()) {
				//获取MultipartFile类型文件
				MultipartFile fileDetail = multiRequest.getFile(it.next());
				if (fileDetail != null) {
					String fileName = "demoUpload" + fileDetail.getOriginalFilename();
					String path = "D:/" + fileName;
					File localFile = new File(path);
					//将上传文件写入到指定文件出、核心！
					fileDetail.transferTo(localFile);
					//非常重要、有了这个想做什么处理都可以
					//fileDetail.getInputStream();
				}
			}
		}
		return "/success";
	}

	@RequestMapping("toUpload")
	public String tpUpload() {
		return "/upload";
	}
}