在eclipse中的javaEE环境下：导入必要的架包
web.xml的配置文件：
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<?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_2_5.xsd" id="WebApp_ID" version="2.5"> <!-- 配置SpringMVC的DispatcherServlet --> <servlet> <servlet-name>springDispatcherServlet</servlet-name> <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class> <init-param> <param-name>contextConfigLocation</param-name> <param-value>classpath:springmvc.xml</param-value> </init-param> <load-on-startup>1</load-on-startup> </servlet> <servlet-mapping> <servlet-name>springDispatcherServlet</servlet-name> <url-pattern>/</url-pattern> </servlet-mapping> <!-- 配置 HiddenHttpMethodFilter: 把 POST 请求转为 DELETE、PUT 请求 --> <filter> <filter-name>HiddenHttpMethodFilter</filter-name> <filter-class>org.springframework.web.filter.HiddenHttpMethodFilter</filter-class> </filter> <filter-mapping> <filter-name>HiddenHttpMethodFilter</filter-name> <url-pattern>/*</url-pattern> </filter-mapping> </web-app> |
spring的bean的配置文件springmvc.xml;
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<?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" xmlns:mvc="http://www.springframework.org/schema/mvc" 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.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.0.xsd"> <!-- 配置自动扫描的包 --> <context:component-scan base-package="com.atguigu.springmvc"></context:component-scan> <!-- 配置视图解析器 --> <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver"> <property name="prefix" value="/WEB-INF/views/"></property> <property name="suffix" value=".jsp"></property> </bean> <!-- default-servlet-handler 将在 SpringMVC 上下文中定义一个 DefaultServletHttpRequestHandler, 它会对进入 DispatcherServlet 的请求进行筛查, 如果发现是没有经过映射的请求, 就将该请求交由 WEB 应用服务器默认的 Servlet 处理. 如果不是静态资源的请求，才由 DispatcherServlet 继续处理 一般 WEB 应用服务器默认的 Servlet 的名称都是 default. 若所使用的 WEB 服务器的默认 Servlet 名称不是 default，则需要通过 default-servlet-name 属性显式指定 --> <mvc:default-servlet-handler/> <!-- 一般都会配置这个 <mvc:annotation-driven ></mvc:annotation-driven>， 由于。。。requestmapping请求实现不了，使用这个，会使requestmapping请求一定实现 --> <mvc:annotation-driven ></mvc:annotation-driven> <!-- 配置 MultipartResolver ，即配置文件上传的属性--> <bean id="multipartResolver" class="org.springframework.web.multipart.commons.CommonsMultipartResolver"> <!-- 默认的字符编码 --> <property name="defaultEncoding" value="UTF-8"></property> <!-- 上传文件的大小 ,最大上传大小--> <property name="maxUploadSize" value="1024000"></property> </bean> </beans> |
handler类方法：实现文件的上传和下载的方法
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@Controllerpublic class SpringMVCTest { @Autowired private EmployeeDao employeeDao; //实现文件的下载 //需要说明的是文件的上传和下载不需要其他配置 @RequestMapping("testResponseEntity") public ResponseEntity<byte[]> testResponseEntity(HttpSession session) throws IOException{ byte[] body=null; ServletContext servletContext=session.getServletContext(); ///files/abc.txt：所要下载文件的地址 InputStream in=servletContext.getResourceAsStream("/files/abc.txt"); body=new byte[in.available()]; in.read(body); HttpHeaders headers=new HttpHeaders(); //响应头的名字和响应头的值 headers.add("Content-Disposition", "attachment;filename=abc.txt"); HttpStatus statusCode=HttpStatus.OK; ResponseEntity<byte[]> response=new ResponseEntity<byte[]>(body, headers, statusCode); return response; } //文件上传， @RequestMapping("/testFileUpload") public String testFileUpload(@RequestParam("desc") String desc, @RequestParam("file") MultipartFile file) throws IOException{ System.out.println("desc:"+desc); System.out.println("OriginalFilename"+file.getOriginalFilename()); System.out.println("InputStream"+file.getInputStream()); return "success"; } } |
jsp页面：index.jsp：
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<%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%><!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=UTF-8"><title>Insert title here</title></head><body> <center> <!-- 文件上传的表单 --> <form action="testFileUpload" method="post" enctype="multipart/form-data"> File:<input type="file" name="file"/> Desc:<input type="text" name="desc"/> <input type="submit" value="Submit"/> </form> <br><br> <!-- 文件的下载 --> <a href="testResponseEntity" rel="external nofollow" >Test ResponseEntity</a> </center> </body></html> |
success.jsp页面：显示文件上传成功
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<%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%><!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=UTF-8"><title>Insert title here</title></head><body> <h3>Success page</h3> </body></html> |
以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持服务器之家。
原文链接：http://www.cnblogs.com/lxnlxn/p/5938861.html
