SpringMVC文件上传

最新推荐文章于 2024-07-08 08:54:11 发布

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最新推荐文章于 2024-07-08 08:54:11 发布

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分类专栏： SpringMVC 文章标签： spring mvc

本文链接：https://blog.youkuaiyun.com/qq_25983417/article/details/52680178

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本文介绍了一个使用Spring MVC实现文件上传的例子。从搭建项目环境开始，详细讲述了如何配置web.xml和SpringServlet-servlet.xml，创建文件上传控制器并实现文件上传功能。

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一、新建一个web项目

二、导入相关jar包

包括Spring所有包+commons-logging-1.1.1.jar+commons-io-2.4.jar+commons-fileupload-1.3.1.jar

三、编写web.xml文件

<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://java.sun.com/xml/ns/javaee" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd" id="WebApp_ID" version="3.0">
  <filter>
  	<filter-name>CharacterEncodingFilter</filter-name>
  	<filter-class>org.springframework.web.filter.CharacterEncodingFilter</filter-class>
  	<init-param>
  		<param-name>encoding</param-name>
  		<param-value>utf-8</param-value>
  	</init-param>
  </filter>
  <filter-mapping>
  	<filter-name>CharacterEncodingFilter</filter-name>
  	<url-pattern>/*</url-pattern>
  </filter-mapping>
  <servlet>
  	<servlet-name>SpringServlet</servlet-name>
  	<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
  	<init-param>
  		<param-name>contextConfigLocation</param-name>
  		<param-value>classpath:mvc.xml</param-value>
  	</init-param>
  	<load-on-startup>1</load-on-startup>
  </servlet>
  <servlet-mapping>
  	<servlet-name>SpringServlet</servlet-name>
  	<url-pattern>*.do</url-pattern>
  </servlet-mapping>
  <welcome-file-list>
    <welcome-file>hello.do</welcome-file>
  </welcome-file-list>
</web-app>

四、在src目录下新建一个SpringServlet-servlet.xml的配置文件(命名方式为web.xml中定义的DispatcherServlet名-servlet.xml)

<?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"
	xsi:schemaLocation="
	http://www.springframework.org/schema/beans
	http://www.springframework.org/schema/beans/spring-beans-4.3.xsd
	http://www.springframework.org/schema/context
	http://www.springframework.org/schema/context/spring-context.xsd">
	<context:component-scan base-package="com.zscs.controller"/>
	<!-- 配置渲染器 -->
	<bean id="viewResolver"
		class="org.springframework.web.servlet.view.UrlBasedViewResolver">
		<property name="viewClass" value="org.springframework.web.servlet.view.JstlView"/>
		<!-- 结果是视图的前缀 -->
		<property name="prefix" value="/WEB-INF/jsp/"/>
		<!-- 结果是视图的后缀 -->
		<property name="suffix" value=".jsp"/>
	</bean>

<span style="white-space:pre">	</span><!--配置文件上传类-->
	<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>

五、在WEB-INFO 目录下新建一个文件夹文件夹名为jsp与上述渲染器配置中结果视图的前缀保持一致，并且在jsp目录下新建一个jsp文件。

编写文件上传的jsp页面action='hello.do'

六、编写上传控制器类FileUploadController

package com.zscs.controller;

import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;

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.commons.CommonsMultipartFile;

@Controller
public class FileUploadController {
	@RequestMapping("/upload")
	public String fileUpload(@RequestParam("file") CommonsMultipartFile file,HttpServletRequest req) throws IOException{
		//获取文件名
		//file.getOriginalFilename();
		//获取上传文件路径
		String path=req.getRealPath("/fileupload");
		InputStream is=file.getInputStream();
		System.out.println(is.toString());
		OutputStream os=new FileOutputStream(new File(path, file.getOriginalFilename()));
		int len=0;
		byte[] buffer=new byte[400];
		while((len=is.read(buffer))!=-1)
			os.write(buffer,0,len);
		os.close();
		is.close();
		return "hello";
	}
}