springMVC_03文件上传

springMVC文件上传

 

增加上传组件依赖：

In the case of the CommonsMultipartResolver, you need to use commons-fileupload.jar.

apache-commons-io.jar

apache-commons-fileupload.jar

 

		<!-- fileupload -->
		<dependency>
			<groupId>commons-io</groupId>
			<artifactId>commons-io</artifactId>
			<version>2.4</version>
		</dependency>
		<dependency>
			<groupId>commons-fileupload</groupId>
			<artifactId>commons-fileupload</artifactId>
			<version>1.3</version>
		</dependency>

 

 

 

 

配置文件上传相关配置，springMVC.xml配置如下：

 

 

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xmlns:p="http://www.springframework.org/schema/p"
    xmlns:context="http://www.springframework.org/schema/context"
    xmlns:mvc="http://www.springframework.org/schema/mvc"
    xsi:schemaLocation="        http://www.springframework.org/schema/beans
        http://www.springframework.org/schema/beans/spring-beans.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.xsd">
    
    <!-- 自动注册DefaultAnnotationHandlerMapping与AnnotationMethodHandlerAdapter -->
    <!-- 两个bean 是spring MVC为@Controllers分发请求所必须的  -->
    <mvc:annotation-driven/>

    <!-- 配置需要被扫描的包 -->
    <context:component-scan base-package="com.gc.springmvc.controller"/>

    <!-- 配置对静态资源文件的访问不被过滤 WebContent/resources目录中的文件都能访问 -->
    <mvc:resources location="/resources/" mapping="/resources/**"/>
    
    <!-- 配置返回的数据如何呈现：前缀+逻辑视图+后缀 -->
    <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
    <property name="viewClass" value="org.springframework.web.servlet.view.JstlView" /> 
    	<property name="prefix" value="/WEB-INF/jsp/"/>
    	<property name="suffix" value=".jsp"/>
    </bean>
    
    <!-- 文件上传 -->
    <bean id="multipartResolver"
    	  class="org.springframework.web.multipart.commons.CommonsMultipartResolver">
    	<!-- Default is ISO-8859-1 -->
    	<property name="defaultEncoding" value="UTF-8"/>
    	<!-- Default is 10240 -->
    	<property name="maxInMemorySize" value="10240"/>
    	<!-- -1 indicates no limit (the default) -->
    	<property name="maxUploadSize" value="100000"/>
    	<!-- javax.servlet.context.tempdir(the default) 临时文件存放目录，不是最终目录！-->
    	<property name="uploadTempDir" value="/tempdir"/>
    </bean>
    
</beans>

 

 

上传页面

	<form action="fileupload" method="post" enctype="multipart/form-data">
		文件名称:
		<input type="text" name="name"/> <br/>
		选择文件：
		<input type="file" name="file"/> <br/>
		<input type="submit"/>	
	</form>

 

上传控制器

package com.gc.springmvc.controller;

import java.io.File;
import java.util.Date;

import javax.servlet.ServletContext;

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.context.ServletContextAware;
import org.springframework.web.multipart.commons.CommonsMultipartFile;
import org.springframework.web.servlet.view.InternalResourceViewResolver;

@Controller
public class FileUploadController implements ServletContextAware{
	
	private ServletContext servletContext;
	
	public void setServletContext(ServletContext servletContext) {
		this.servletContext = servletContext;
	}
	
	/**
	 * 文件上传
	 * @param assignedName 为文件指定新的名称
	 * @param file	上传的文件
	 * @return
	 */
	@RequestMapping(value={"fileupload"}, method=RequestMethod.POST)
	public String fileupload(@RequestParam("name")String assignedName,@RequestParam("file")CommonsMultipartFile file) {
		String viewName = "uploadSuccess";
		if(!file.isEmpty()) {
			//通过servletContext获取到文件的绝对路径
			String realPath = servletContext.getRealPath("/upload");
			System.out.println("文件被保存到："+realPath);
			
			System.out.println("指定的名称："+assignedName);
			
			String originalFileName = file.getOriginalFilename();
			System.out.println("原始名称："+originalFileName);
			
			String fileType = originalFileName.substring(originalFileName.lastIndexOf("."));
			System.out.println("文件类型："+fileType);
			
			File targetFile = new File(realPath, assignedName+"-"+new Date().getTime()+fileType);
			try {
				file.getFileItem().write(targetFile);
			} catch (Exception e) {
				e.printStackTrace();
				viewName = "uploadFailure";
			};
		}
		//重定向
		return InternalResourceViewResolver.REDIRECT_URL_PREFIX+viewName;
	}
	
	/**
	 * 返回成功视图 
	 */
	@RequestMapping(value="uploadSuccess")
	public String uploadSuccess() {
		return "uploadSuccess";
	}
	
	/**
	 * 返回失败视图 
	 */
	@RequestMapping("uploadFailure")
	public String uploadFailure() {
		return "uploadFailure";
	}

}