这是主要使用到的jar 文件是:spring mvc +apache common-fileuplad
第一步:web.xml 文件。【重点是spring mvc的拦截器和相关监听器】
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<? xml version = "1.0" encoding = "UTF-8" ?> < web-app version = "2.5" xmlns = "http://java.sun.com/xml/ns/javaee" xmlns:xsi = "http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd"> < display-name ></ display-name > <!-- Spring和mybatis的配置文件 --> < context-param > < param-name >contextConfigLocation</ param-name > < param-value >classpath:spring-mybatis.xml</ param-value > </ context-param > <!-- 编码过滤器 --> < filter > < filter-name >encodingFilter</ 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 >encodingFilter</ filter-name > < url-pattern >/*</ url-pattern > </ filter-mapping > <!-- Spring监听器 --> < listener > < listener-class >org.springframework.web.context.ContextLoaderListener</ listener-class > </ listener > <!-- 防止Spring内存溢出监听器 --> < listener > < listener-class >org.springframework.web.util.IntrospectorCleanupListener</ listener-class > </ listener > <!-- Spring MVC servlet --> < 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 > <!-- 此处可以可以配置成*.do,对应struts的后缀习惯 --> < url-pattern >/</ url-pattern > </ servlet-mapping > < welcome-file-list > < welcome-file >/index.jsp</ welcome-file > </ welcome-file-list > </ web-app > |
第二步:spring-mvc 配置文件【重点:spring mvc 视图模式,spring mvc 文件上传限定参数,spring mvc 资源拦截管理和其他】
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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: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-3.1.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.1.xsd http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-4.0.xsd"> <!-- 自动扫描该包,使SpringMVC认为包下用了@controller注解的类是控制器 --> < mvc:annotation-driven /> < mvc:default-servlet-handler /> < context:annotation-config /> < context:component-scan base-package = "com" /> <!--避免IE执行AJAX时,返回JSON出现下载文件 --> < bean id = "mappingJacksonHttpMessageConverter" class = "org.springframework.http.converter.json.MappingJacksonHttpMessageConverter" > < property name = "supportedMediaTypes" > < list > < value >text/html;charset=UTF-8</ value > </ list > </ property > </ bean > <!-- 启动SpringMVC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" > < property name = "messageConverters" > < list > < ref bean = "mappingJacksonHttpMessageConverter" /> <!-- JSON转换器 --> </ list > </ property > </ bean > <!-- 定义跳转的文件的前后缀 ,视图模式配置--> < bean class = "org.springframework.web.servlet.view.InternalResourceViewResolver" > <!-- 这里的配置我的理解是自动给后面action的方法return的字符串加上前缀和后缀,变成一个 可用的url地址 --> < property name = "prefix" value = "/backstage/jsp/" /> < property name = "suffix" value = ".jsp" /> </ bean > <!-- 配置文件上传,如果没有使用文件上传可以不用配置,当然如果不配,那么配置文件中也不必引入上传组件包 --> < bean id = "multipartResolver" class = "org.springframework.web.multipart.commons.CommonsMultipartResolver" > <!-- 默认编码 --> < property name = "defaultEncoding" value = "utf-8" /> <!-- 文件大小最大值 --> < property name = "maxUploadSize" value = "10485760000" /> <!-- 内存中的最大值 --> < property name = "maxInMemorySize" value = "40960" /> </ bean > <!-- 声明DispatcherServlet不要拦截下面声明的目录 --> < mvc:resources location = "/js/" mapping = "/js/**" /> < mvc:resources location = "/images/" mapping = "/images/**" /> < mvc:resources location = "/css/" mapping = "/css/**" /> < mvc:resources location = "/common/" mapping = "/common/**" /> </ beans > |
第三步:jsp 页面
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<%@ page language="java" pageEncoding="UTF-8"%> < form action="<%=request.getContextPath()%>/users/add" method="POST" enctype="multipart/form-data"> username: < input type = "text" name = "username" />< br /> nickname: < input type = "text" name = "nickname" />< br /> password: < input type = "password" name = "password" />< br /> yourmail: < input type = "text" name = "email" />< br /> yourfile: < input type = "file" name = "myfiles" />< br /> < input type = "submit" value = "添加新用户" /> </ form > |
第四步:spring mvc 控制器代码
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package com.wlsq.controller; import java.io.File; import java.io.IOException; import java.util.HashMap; import java.util.List; import java.util.Map; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import org.apache.commons.io.FileUtils; import org.springframework.beans.factory.annotation.Autowired; 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.multipart.MultipartFile; import org.springframework.web.servlet.ModelAndView; import com.wlsq.model.News; import com.wlsq.service.IUserMapperService; import com.wlsq.util.Pagination; @Controller @RequestMapping (value= "/users" ) public class UserController { @Autowired private IUserMapperService userService; @RequestMapping (value= "/userAll" ) public ModelAndView searchNews(HttpServletRequest request,HttpServletResponse response){ ModelAndView mv = null ; try { mv = new ModelAndView(); int pageSize = Integer .parseInt(request.getParameter( "pageSize" ) == null ? "10" : request.getParameter( "pageSize" )); int pageNum = Integer .parseInt(request.getParameter( "pageNum" ) == null ? "1" : request.getParameter( "pageNum" )); Map<String, Object> maps = new HashMap<>(); maps.put( "pageSize" , pageSize); maps.put( "pageNum" , (pageNum- 1 ) * pageSize); List<News> list =userService.selectAllUsers(maps); int count = userService.selectCountUsers(); Pagination page = new Pagination(count); page.setCurrentPage(pageNum); mv.addObject( "pnums" , page.getPageNumList()); mv.addObject( "currentPage" , pageNum); mv.addObject( "pnext_flag" , page.nextEnable()); mv.addObject( "plast_flag" , page.lastEnable()); page.lastPage(); mv.addObject( "last_page" , page.getCurrentPage()); mv.addObject( "count" , count); mv.addObject( "pageCount" , page.getPages()); if (list != null && list.size()> 0 ){ //用户存在 mv.addObject( "partners" , list); //设置逻辑视图名,视图解析器会根据该名字解析到具体的视图页面 mv.setViewName( "/users/users" ); } else { //用户存在 mv.addObject( "partners" , list); //设置逻辑视图名,视图解析器会根据该名字解析到具体的视图页面 mv.setViewName( "/users/users" ); } } catch (Exception e){ //设置逻辑视图名,视图解析器会根据该名字解析到具体的视图页面 mv.setViewName( "/users/users" ); } return mv; } @RequestMapping (value= "/add" , method=RequestMethod.POST) public String addUser( @RequestParam MultipartFile[] myfiles, HttpServletRequest request) throws IOException{ String username = request.getParameter( "username" ); String nickname = request.getParameter( "nickname" ); String password = request.getParameter( "password" ); String email = request.getParameter( "email" ); System.out.println( "name:" +username); System.out.println( "nickname:" +nickname); System.out.println( "password:" +password); System.out.println( "email:" +email); //如果只是上传一个文件,则只需要MultipartFile类型接收文件即可,而且无需显式指定@RequestParam注解 //如果想上传多个文件,那么 这里就要用MultipartFile[]类型来接收文件,并且还要指定@RequestParam注解 //并且上传多个文件时,前台表单中的所有<input type="file"/>的name都应该是myfiles,否则参数里的myfiles无法获取到所有上传的文件 for (MultipartFile myfile : myfiles){ if (myfile.isEmpty()){ System.out.println( "文件未上传" ); } else { System.out.println( "文件长度: " + myfile.getSize()); System.out.println( "文件类型: " + myfile.getContentType()); System.out.println( "文件名称: " + myfile.getName()); System.out.println( "文件原名: " + myfile.getOriginalFilename()); System.out.println( "========================================" ); //如果用的是Tomcat服务器,则文件会上传到\\%TOMCAT_HOME%\\webapps\\YourWebProject\\WEB-INF\\upload\\文件夹中 String realPath = request.getSession().getServletContext().getRealPath( "/WEB-INF/upload" ); //这里不必处理IO流关闭的问题,因为FileUtils.copyInputStreamToFile()方法内部会自动把用到的IO流关掉,我是看它的源码才知道的 FileUtils.copyInputStreamToFile(myfile.getInputStream(), new File(realPath, myfile.getOriginalFilename())); } } return "../../index" ; } } |
记得在WEB-INFO建立存放上传文件目录(upload)
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://blog.csdn.net/zhouzhiwengang/article/details/51055012?locationNum=14&fps=1