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spring mvc(注解)上传文件的简单例子
spring mvc(注解)上传文件的简单例子
spring mvc(注解)上传文件的简单例子,
这有几个需要注意的地方
1.form的enctype=”multipart/form-data” 这个是上传文件必须的
2.applicationContext.xml中 <bean id=”multipartResolver”
class=”org.springframework.web.multipart.commons.CommonsMultipartResolver”/> 关于文件上传的配置不能少
3、亲这两个jar包不能少哦,之前就是因为少了这个两个jar,一直报一些奇葩的错,给我累了个半死~(版本没什么要求)
commons-fileupload-1.2.2.jar
commons-io-2.0.1.jar
大家可以看具体代码如下:
web.xml
- <?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" xmlns:web="http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" id="WebApp_ID" version="2.5">
- <display-name>webtest</display-name>
- <listener>
- <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
- </listener>
- <context-param>
- <param-name>contextConfigLocation</param-name>
- <param-value>
- /WEB-INF/config/applicationContext.xml
- /WEB-INF/config/codeifAction.xml
- </param-value>
- </context-param>
- <servlet>
- <servlet-name>dispatcherServlet</servlet-name>
- <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
- <init-param>
- <param-name>contextConfigLocation</param-name>
- <param-value>/WEB-INF/config/codeifAction.xml</param-value>
- </init-param>
- <load-on-startup>1</load-on-startup>
- </servlet>
- <!-- 拦截所有以do结尾的请求 -->
- <servlet-mapping>
- <servlet-name>dispatcherServlet</servlet-name>
- <url-pattern>*.do</url-pattern>
- </servlet-mapping>
- <welcome-file-list>
- <welcome-file>index.do</welcome-file>
- </welcome-file-list>
- </web-app>
applicationContext.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-3.0.xsd
- http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.0.xsd"
- default-lazy-init="true">
- <!-- 启动Spring MVC的注解功能,完成请求和注解POJO的映射 -->
- <bean class="org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter" lazy-init="false" />
- <!-- 另外最好还要加入DefaultAnnotationHandlerMapping,不然会被 XML或其它的映射覆盖! -->
- <bean class="org.springframework.web.servlet.mvc.annotation.DefaultAnnotationHandlerMapping" />
- <!-- 对模型视图名称的解析,即在模型视图名称添加前后缀 -->
- <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver" p:prefix="/WEB-INF/jsp/" p:suffix=".jsp" />
- <!-- 支持上传文件 -->
- <bean id="multipartResolver" class="org.springframework.web.multipart.commons.CommonsMultipartResolver"/>
- </beans>
codeifAction.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:context="http://www.springframework.org/schema/context"
- 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-3.0.xsd"
- default-lazy-init="true">
- <bean id="uploadAction" class="com.codeif.action.UploadAction" />
- </beans>
UploadAction.java
- package com.codeif.action;
- import java.io.File;
- import java.util.Date;
- import javax.servlet.http.HttpServletRequest;
- import org.springframework.stereotype.Controller;
- import org.springframework.ui.ModelMap;
- import org.springframework.web.bind.annotation.RequestMapping;
- import org.springframework.web.bind.annotation.RequestParam;
- import org.springframework.web.multipart.MultipartFile;
- @Controller
- public class UploadAction {
- @RequestMapping(value = "/upload.do")
- public String upload(@RequestParam(value = "file", required = false) MultipartFile file, HttpServletRequest request, ModelMap model) {
- System.out.println("开始");
- String path = request.getSession().getServletContext().getRealPath("upload");
- String fileName = file.getOriginalFilename();
- // String fileName = new Date().getTime()+".jpg";
- System.out.println(path);
- File targetFile = new File(path, fileName);
- if(!targetFile.exists()){
- targetFile.mkdirs();
- }
- //保存
- try {
- file.transferTo(targetFile);
- } catch (Exception e) {
- e.printStackTrace();
- }
- model.addAttribute("fileUrl", request.getContextPath()+"/upload/"+fileName);
- return "result";
- }
- }
index.jsp
- <%@ page pageEncoding="utf-8"%>
- <!DOCTYPE html>
- <html>
- <head>
- <meta charset="utf-8">
- <title>上传图片</title>
- </head>
- <body>
- <form action="upload.do" method="post" enctype="multipart/form-data">
- <input type="file" name="file" /> <input type="submit" value=http://www.mamicode.com/"Submit" /></form>
- </body>
- </html>
WEB-INF/jsp/下的result.jsp
- <%@ page pageEncoding="utf-8"%>
- <!DOCTYPE html>
- <html>
- <head>
- <meta charset="utf-8">
- <title>上传结果</title>
- </head>
- <body>
- <img alt="" src=http://www.mamicode.com/"${fileUrl }" />
- </body>
- </html>
spring mvc(注解)上传文件的简单例子
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