struts2实现多文件上传的示例代码

 本篇文章主要介绍了struts2实现多文件上传的示例代码，小编觉得挺不错的，现在分享给大家，也给大家做个参考。一起跟随小编过来看看吧

开发环境JDK1.8 eclipse struts2-2.3.31 

1.创建web项目 

2.导入struts2核心jar包 

3.更改web.xml配置文件（只要配置好struts2的Filter就好） 

4.创建src/struts.xml文件

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<? xml version = "1.0" encoding = "UTF-8" ?> <!DOCTYPE struts PUBLIC    "-//Apache Software Foundation//DTD Struts Configuration 2.0//EN"    "http://struts.apache.org/dtds/struts-2.0.dtd">   < struts >    <!-- 该属性指定需要Struts2处理的请求后缀，该属性的默认值是action，即所有匹配*.action的请求都由Struts2处理。      如果用户需要指定多个请求后缀，则多个后缀之间以英文逗号（,）隔开。 -->    < constant name = "struts.action.extension" value = "do" />    <!-- 设置浏览器是否缓存静态内容,默认值为true(生产环境下使用),开发阶段最好关闭 -->    < constant name = "struts.serve.static.browserCache" value = "false" />    <!-- 当struts的配置文件修改后,系统是否自动重新加载该文件,默认值为false(生产环境下使用),开发阶段最好打开 -->    < constant name = "struts.configuration.xml.reload" value = "true" />    <!-- 开发模式下使用,这样可以打印出更详细的错误信息 -->    < constant name = "struts.devMode" value = "true" />    <!-- 默认的视图主题 -->    < constant name = "struts.ui.theme" value = "simple" />    <!--<constant name="struts.objectFactory" value="spring" />-->    <!--解决乱码  -->    < constant name = "struts.i18n.encoding" value = "UTF-8" />    <!-- 指定允许上传的文件最大字节数。默认值是2097152(2M) -->    < constant name = "struts.multipart.maxSize" value = "10701096" />    <!-- 设置上传文件的临时文件夹,默认使用javax.servlet.context.tempdir -->    < constant name = "struts.multipart.saveDir " value = "d:/tmp" />      < package name = "upload" extends = "struts-default" >      < action name = "fileUpload" class = "com.ifan.action.FileUpload" >        <!-- 动态设置savePath的属性值 -->        < param name = "savePath" >WEB-INF/images</ param >        < result name = "success" >/success.jsp</ result >        < result name = "input" >/error.jsp</ result >        < interceptor-ref name = "fileUpload" >          <!-- 文件过滤 -->          < param name = "allowedTypes" >image/bmp,image/png,image/gif,image/jpeg</ param >          <!-- 文件大小, 以字节为单位 -->          < param name = "maximumSize" >1025956</ param >        </ interceptor-ref >        <!-- 默认拦截器必须放在fileUpload之后，否则无效 -->        < interceptor-ref name = "defaultStack" />      </ action >    </ package > </ struts >

5.创建src/com.ifan.action.FileUpload.Java

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package com.ifan.action;   import java.io.File;   import org.apache.commons.io.FileUtils; import org.apache.struts2.ServletActionContext;   import com.opensymphony.xwork2.ActionContext; import com.opensymphony.xwork2.ActionSupport;   public class FileUpload extends ActionSupport{      private File[] image; //上传的文件    private String[] imageFileName; //文件名称    private String[] imageContentType; //文件类型      public String execute() throws Exception {      ServletActionContext.getRequest().setCharacterEncoding( "UTF-8" );      String realpath = ServletActionContext.getServletContext().getRealPath( "/images" );      System.out.println(realpath);      if (image != null ) {        File savedir= new File(realpath);        if (!savedir.getParentFile().exists())          savedir.getParentFile().mkdirs();        for ( int i= 0 ;i<image.length;i++){          File savefile = new File(savedir, imageFileName[i]);          FileUtils.copyFile(image[i], savefile);        }        ActionContext.getContext().put( "message" , "文件上传成功" );      }      return "success" ;    }      public File[] getImage() {      return image;    }      public void setImage(File[] image) {      this .image = image;    }      public String[] getImageContentType() {      return imageContentType;    }      public void setImageContentType(String[] imageContentType) {      this .imageContentType = imageContentType;    }      public String[] getImageFileName() {      return imageFileName;    }      public void setImageFileName(String[] imageFileName) {      this .imageFileName = imageFileName;    } }

6.创建WebContent/index.jsp ，作为上传文件的页面

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<%@ page language= "java" import = "java.util.*" pageEncoding= "UTF-8" %> <%@ taglib prefix= "s" uri= "/struts-tags" %> <%    String path = request.getContextPath();    String basePath = request.getScheme() + "://" + request.getServerName() + ":" + request.getServerPort()        + path + "/" ; %>   <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" > <html> <head> <base href= "<%=basePath%>" rel= "external nofollow" >   <title>My JSP 'hello.jsp' starting page</title>   <meta http-equiv= "pragma" content= "no-cache" > <meta http-equiv= "cache-control" content= "no-cache" > <meta http-equiv= "expires" content= "0" > <meta http-equiv= "keywords" content= "keyword1,keyword2,keyword3" > <meta http-equiv= "description" content= "This is my page" > <!--    <link rel= "stylesheet" type= "text/css" href= "styles.css" rel= "external nofollow" >    -->   </head>   <body> <!-- Struts2的文件上传标签 --> <s:form action= "fileUpload" namespace= "/" method= "POST" enctype= "multipart/form-data" > <!-- 该name需要和后台的File类型的名字对应起来，否则将得不到该文件 size 上传文件的大小 --> <s:file name= "image" label= "Select a File to upload" size= "40" /> <s:file name= "image" label= "Select a File to upload" size= "40" /> <s:submit value= "submit" name= "submit" />   </s:form>   </body> </html>

7.创建WebContent/success.jsp 作为文件上传成功跳转的页面，创建WebContent/error.jsp 作为文件上传失败的页面 ， 创建WebContent/images文件夹，作为上传文件的存储位置

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脚本之家。