SpringMVC实现文件上传需要加入jar包,commons-fileupload-1.3.1.jar,commons-io-2.2.jar
项目目录树:
pom.xml加入需要的包
<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>springMVC</groupId> <artifactId>springmvc01</artifactId> <packaging>war</packaging> <version>0.0.1-SNAPSHOT</version> <name>springmvc01 Maven Webapp</name> <url>http://maven.apache.org</url> <dependencies> <dependency> <groupId>junit</groupId> <artifactId>junit</artifactId> <version>3.8.1</version> <scope>test</scope> </dependency> <!-- https://mvnrepository.com/artifact/org.springframework/spring-webmvc --> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-webmvc</artifactId> <version>4.3.2.RELEASE</version> </dependency> <!-- https://mvnrepository.com/artifact/javax.servlet/jstl --> <dependency> <groupId>javax.servlet</groupId> <artifactId>jstl</artifactId> <version>1.2</version> </dependency> <!-- https://mvnrepository.com/artifact/com.fasterxml.jackson.core/jackson-core --> <dependency> <groupId>com.fasterxml.jackson.core</groupId> <artifactId>jackson-core</artifactId> <version>2.7.3</version> </dependency> <!-- https://mvnrepository.com/artifact/com.fasterxml.jackson.core/jackson-annotations --> <dependency> <groupId>com.fasterxml.jackson.core</groupId> <artifactId>jackson-annotations</artifactId> <version>2.7.3</version> </dependency> <!-- https://mvnrepository.com/artifact/com.fasterxml.jackson.core/jackson-databind --> <dependency> <groupId>com.fasterxml.jackson.core</groupId> <artifactId>jackson-databind</artifactId> <version>2.7.3</version> </dependency> <!-- https://mvnrepository.com/artifact/org.hibernate/hibernate-validator --> <dependency> <groupId>org.hibernate</groupId> <artifactId>hibernate-validator</artifactId> <version>5.2.4.Final</version> </dependency> <!-- https://mvnrepository.com/artifact/commons-fileupload/commons-fileupload --> <dependency> <groupId>commons-fileupload</groupId> <artifactId>commons-fileupload</artifactId> <version>1.3.1</version> </dependency> </dependencies> <build> <finalName>springmvc01</finalName> </build> </project>
web.xml配置
<!DOCTYPE web-app PUBLIC "-//Sun Microsystems, Inc.//DTD Web Application 2.3//EN" "http://java.sun.com/dtd/web-app_2_3.dtd" > <web-app> <!-- 注册字符集Filter --> <filter> <filter-name>characterEncodingFiter</filter-name> <filter-class>org.springframework.web.filter.CharacterEncodingFilter</filter-class> <init-param> <param-name>encoding</param-name> <param-value>GBK</param-value> </init-param> <init-param> <param-name>forceEncoding</param-name> <param-value>true</param-value> </init-param> </filter> <filter-mapping> <filter-name>characterEncodingFiter</filter-name> <url-pattern>/*</url-pattern> </filter-mapping> <!-- 注册springMVC中央调度器 --> <servlet> <servlet-name>springMVC</servlet-name> <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class> <init-param> <param-name>contextConfigLocation</param-name> <param-value>classpath:spring-mvc.xml</param-value> </init-param> <load-on-startup>1</load-on-startup> </servlet> <servlet-mapping> <servlet-name>springMVC</servlet-name> <url-pattern>/</url-pattern> </servlet-mapping> </web-app>
spring-mvc.xml SpringMVC的配置文件
<?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:mvc="http://www.springframework.org/schema/mvc" xmlns:context="http://www.springframework.org/schema/context" xsi:schemaLocation=" http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-4.0.xsd http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-4.0.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.0.xsd"> <!-- 扫描注解 --> <context:component-scan base-package="com.orange.controller" /> <!-- 注册multipart解析器,这个id是固定的,由DispatcherServlet直接调用 --> <bean id="multipartResolver" class="org.springframework.web.multipart.commons.CommonsMultipartResolver"> <property name="defaultEncoding" value="GBK" /> <property name="maxUploadSize" value="102400"></property> <!-- 改属性延迟解析,当进入Controller时开始解析,这样就可以捕获到异常,否则由SpringMVC抛出异常时无法捕获 --> <property name="resolveLazily" value="true"></property> </bean> </beans>
控制器UploadController.java
package com.orange.controller; import java.io.File; import java.io.IOException; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpSession; import org.apache.commons.fileupload.FileUploadBase.SizeLimitExceededException; import org.springframework.stereotype.Controller; import org.springframework.web.bind.annotation.ExceptionHandler; import org.springframework.web.bind.annotation.RequestMapping; import org.springframework.web.bind.annotation.RequestParam; import org.springframework.web.multipart.MaxUploadSizeExceededException; import org.springframework.web.multipart.MultipartFile; import org.springframework.web.servlet.ModelAndView; @Controller @RequestMapping(value="/upload") public class UploadController { @RequestMapping(value="/upload") public String doUpload(@RequestParam MultipartFile photo, HttpSession session) throws Exception{ if(!photo.isEmpty()){ String path = session.getServletContext().getRealPath("/upload"); String fileName = photo.getOriginalFilename(); if(fileName.endsWith(".jpg") || fileName.endsWith(".png")){ File file = new File(path, fileName); photo.transferTo(file); } else { return "/fail.jsp"; } } return "/success.jsp"; } //拦截异常,当上传文件的大小超过1024 1M时会抛出MaxUploadSizeExceededException @ExceptionHandler(MaxUploadSizeExceededException.class) public ModelAndView exceptionUpload(Exception ex) throws Exception{ ModelAndView mav = new ModelAndView(); mav.addObject("ex", ex); mav.setViewName("/fail.jsp"); return mav; } }
需要在webapp下创建目录upload
测试:上传图片
修改SpringMVC的配置文件spring-mvc.xml,把上传限制为1024,这时上传的文件大于1024,或抛出异常
<property name="maxUploadSize" value="1024"></property>
注意点:必须在spring-mvc.xml注册umltipart解析器时,配置<property name="resolveLazily" value="true"></property>,否则无法使用异常处理器拦截异常,应该不配置时,
是由springmvc框架抛出异常,无法拦截,但配置后,会延迟解析,进入Controller时才解析抛出异常,这时注册异常处理器就可以拦截到
如果上传多个文件,修改Controller中的配置为
package com.orange.controller; import java.io.File; import java.io.IOException; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpSession; import org.apache.commons.fileupload.FileUploadBase.SizeLimitExceededException; import org.springframework.stereotype.Controller; import org.springframework.web.bind.annotation.ExceptionHandler; import org.springframework.web.bind.annotation.RequestMapping; import org.springframework.web.bind.annotation.RequestParam; import org.springframework.web.multipart.MaxUploadSizeExceededException; import org.springframework.web.multipart.MultipartFile; import org.springframework.web.servlet.ModelAndView; @Controller @RequestMapping(value="/upload") public class UploadController { @RequestMapping(value="/upload") public String doUpload(@RequestParam MultipartFile[] photo, HttpSession session) throws Exception{ for(int i=0; i<photo.length; i++){ if(!photo[i].isEmpty()){ String path = session.getServletContext().getRealPath("/upload"); String fileName = photo[i].getOriginalFilename(); if(fileName.endsWith(".jpg") || fileName.endsWith(".png")){ File file = new File(path, fileName); photo[i].transferTo(file); } else { return "/fail.jsp"; } } } return "/success.jsp"; } @ExceptionHandler(MaxUploadSizeExceededException.class) public ModelAndView exceptionUpload(Exception ex) throws Exception{ ModelAndView mav = new ModelAndView(); mav.addObject("ex", ex); mav.setViewName("/fail.jsp"); return mav; } }
修改上传upload.jsp
<%@ page language="java" contentType="text/html; charset=GBK" pageEncoding="GBK"%> <%@ taglib prefix="c" uri="http://java.sun.com/jstl/core" %> <%@ taglib prefix="fn" uri="http://java.sun.com/jsp/jstl/functions" %> <% String path = request.getContextPath(); String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/"; %> <!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=GBK"> <base href="<%=basePath %>"> <title>Default Page</title> </head> <body> <div> <form action="upload/upload" enctype="multipart/form-data" method="post"> 照片:<input type="file" name="photo"><br> 照片:<input type="file" name="photo"><br> 照片:<input type="file" name="photo"><br> 照片:<input type="file" name="photo"><br> 照片:<input type="file" name="photo"><br> <input type="submit" value="上传"> </form> </div> </body> </html>
修改spring-mvx.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:mvc="http://www.springframework.org/schema/mvc" xmlns:context="http://www.springframework.org/schema/context" xsi:schemaLocation=" http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-4.0.xsd http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-4.0.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.0.xsd"> <!-- 扫描注解 --> <context:component-scan base-package="com.orange.controller" /> <!-- 注册multipart解析器,这个id是固定的,由DispatcherServlet直接调用 --> <bean id="multipartResolver" class="org.springframework.web.multipart.commons.CommonsMultipartResolver"> <property name="defaultEncoding" value="GBK" /> <!-- 上传的文件总大小 --> <property name="maxUploadSize" value="1024000000"></property> <!-- 每个上传的文件的大小 --> <property name="maxUploadSizePerFile" value="102400"></property> <!-- 改属性延迟解析,当进入Controller时开始解析,这样就可以捕获到异常,否则由SpringMVC抛出异常时无法捕获 --> <property name="resolveLazily" value="true"></property> </bean> </beans>
多文件上传这里就不在演示了