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spring mvc實(shí)現(xiàn)文件上傳并攜帶其他參數(shù)的示例

更新時(shí)間：2017年02月16日 15:48:32 作者：在奮斗的大道

本篇文章主要介紹了spring mvc實(shí)現(xiàn)文件上傳并攜帶其他參數(shù)的示例，小編覺得挺不錯(cuò)的，現(xiàn)在分享給大家，也給大家做個(gè)參考。一起跟隨小編過(guò)來(lái)看看吧

這是主要使用到的jar 文件是：spring mvc +apache common-fileuplad

第一步：web.xml 文件?！局攸c(diǎn)是spring mvc的攔截器和相關(guān)監(jiān)聽器】

<?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> 
  <!-- 編碼過(guò)濾器 --> 
  <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監(jiān)聽器 --> 
  <listener> 
    <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class> 
  </listener> 
  <!-- 防止Spring內(nèi)存溢出監(jiān)聽器 --> 
  <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> 
    <!-- 此處可以可以配置成*.do，對(duì)應(yīng)struts的后綴習(xí)慣 --> 
    <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【重點(diǎn)：spring mvc 視圖模式，spring mvc 文件上傳限定參數(shù)，spring mvc 資源攔截管理和其他】

<?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"> 
  <!-- 自動(dòng)掃描該包，使SpringMVC認(rèn)為包下用了@controller注解的類是控制器 --> 
  <mvc:annotation-driven />  
  <mvc:default-servlet-handler/>  
  <context:annotation-config/>  
  <context:component-scan base-package="com" /> 
  <!--避免IE執(zhí)行AJAX時(shí)，返回JSON出現(xiàn)下載文件 --> 
  <bean id="mappingJacksonHttpMessageConverter" 
    class="org.springframework.http.converter.json.MappingJacksonHttpMessageConverter"> 
    <property name="supportedMediaTypes"> 
      <list> 
        <value>text/html;charset=UTF-8</value> 
      </list> 
    </property> 
  </bean> 
  <!-- 啟動(dòng)SpringMVC的注解功能，完成請(qǐng)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轉(zhuǎn)換器 --> 
      </list> 
    </property> 
  </bean> 
  <!-- 定義跳轉(zhuǎn)的文件的前后綴 ，視圖模式配置--> 
  <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver"> 
    <!-- 這里的配置我的理解是自動(dòng)給后面action的方法return的字符串加上前綴和后綴，變成一個(gè) 可用的url地址 --> 
    <property name="prefix" value="/backstage/jsp/" /> 
    <property name="suffix" value=".jsp" /> 
  </bean> 
   
  <!-- 配置文件上傳，如果沒有使用文件上傳可以不用配置，當(dāng)然如果不配，那么配置文件中也不必引入上傳組件包 --> 
  <bean id="multipartResolver"  
    class="org.springframework.web.multipart.commons.CommonsMultipartResolver">  
    <!-- 默認(rèn)編碼 --> 
    <property name="defaultEncoding" value="utf-8" />  
    <!-- 文件大小最大值 --> 
    <property name="maxUploadSize" value="10485760000" />  
    <!-- 內(nèi)存中的最大值 --> 
    <property name="maxInMemorySize" value="40960" />  
  </bean>  
   
  <!-- 聲明DispatcherServlet不要攔截下面聲明的目錄  -->  
  <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 頁(yè)面

<%@ 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="添加新用戶"/> 
</form>

第四步：spring mvc 控制器代碼

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){ 
        //用戶存在 
        mv.addObject("partners", list);          
        //設(shè)置邏輯視圖名，視圖解析器會(huì)根據(jù)該名字解析到具體的視圖頁(yè)面 
        mv.setViewName("/users/users");  
      }else{ 
        //用戶存在 
        mv.addObject("partners", list);          
        //設(shè)置邏輯視圖名，視圖解析器會(huì)根據(jù)該名字解析到具體的視圖頁(yè)面 
        mv.setViewName("/users/users");  
      } 
       
    }catch(Exception e){ 
           
      //設(shè)置邏輯視圖名，視圖解析器會(huì)根據(jù)該名字解析到具體的視圖頁(yè)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); 
    //如果只是上傳一個(gè)文件，則只需要MultipartFile類型接收文件即可，而且無(wú)需顯式指定@RequestParam注解 
    //如果想上傳多個(gè)文件，那么 這里就要用MultipartFile[]類型來(lái)接收文件，并且還要指定@RequestParam注解 
    //并且上傳多個(gè)文件時(shí)，前臺(tái)表單中的所有<input type="file"/>的name都應(yīng)該是myfiles，否則參數(shù)里的myfiles無(wú)法獲取到所有上傳的文件 
    for(MultipartFile myfile : myfiles){ 
      if(myfile.isEmpty()){ 
        System.out.println("文件未上傳"); 
      }else{ 
        System.out.println("文件長(zhǎng)度: " + myfile.getSize()); 
        System.out.println("文件類型: " + myfile.getContentType()); 
        System.out.println("文件名稱: " + myfile.getName()); 
        System.out.println("文件原名: " + myfile.getOriginalFilename()); 
        System.out.println("========================================"); 
        //如果用的是Tomcat服務(wù)器，則文件會(huì)上傳到\\%TOMCAT_HOME%\\webapps\\YourWebProject\\WEB-INF\\upload\\文件夾中 
        String realPath = request.getSession().getServletContext().getRealPath("/WEB-INF/upload"); 
        //這里不必處理IO流關(guān)閉的問題，因?yàn)镕ileUtils.copyInputStreamToFile()方法內(nèi)部會(huì)自動(dòng)把用到的IO流關(guān)掉，我是看它的源碼才知道的 
        FileUtils.copyInputStreamToFile(myfile.getInputStream(), new File(realPath, myfile.getOriginalFilename())); 
      } 
    } 
     
    return "../../index"; 
  } 
   
   
 
}

記得在WEB-INFO建立存放上傳文件目錄（upload）

以上就是本文的全部?jī)?nèi)容，希望對(duì)大家的學(xué)習(xí)有所幫助，也希望大家多多支持腳本之家。

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