struts2之多个文件上传

通过3种方式模拟多个文件上传，效果如下所示

         

目录结构

 

新建Action

第一种方式

package com.ljq.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;@SuppressWarnings("serial")public class UploadAction 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;    }    }

                   

第二种方式

package com.ljq.action;import java.io.File;import java.io.FileInputStream;import java.io.FileOutputStream;import org.apache.struts2.ServletActionContext;import com.opensymphony.xwork2.ActionSupport;/** * 使用数组上传多个文件 *  * @author ljq * */@SuppressWarnings("serial")public class UploadAction2 extends ActionSupport{    private File[] image; //上传的文件    private String[] imageFileName; //文件名称    private String[] imageContentType; //文件类型    private String savePath;    @Override    public String execute() throws Exception {        ServletActionContext.getRequest().setCharacterEncoding("UTF-8");        //取得需要上传的文件数组        File[] files = getImage();        if (files !=null && files.length > 0) {            for (int i = 0; i < files.length; i++) {                //建立上传文件的输出流, getImageFileName()[i]                System.out.println(getSavePath() + "\\" + getImageFileName()[i]);                FileOutputStream fos = new FileOutputStream(getSavePath() + "\\" + getImageFileName()[i]);                //建立上传文件的输入流                FileInputStream fis = new FileInputStream(files[i]);                byte[] buffer = new byte[1024];                int len = 0;                while ((len=fis.read(buffer))>0) {                    fos.write(buffer, 0, len);                }                fos.close();                fis.close();            }        }        return SUCCESS;    }    public File[] getImage() {        return image;    }    public void setImage(File[] image) {        this.image = image;    }    public String[] getImageFileName() {        return imageFileName;    }    public void setImageFileName(String[] imageFileName) {        this.imageFileName = imageFileName;    }    public String[] getImageContentType() {        return imageContentType;    }    public void setImageContentType(String[] imageContentType) {        this.imageContentType = imageContentType;    }    /**     * 返回上传文件保存的位置     *      * @return     * @throws Exception     */    public String getSavePath() throws Exception {        return ServletActionContext.getServletContext().getRealPath(savePath);    }    public void setSavePath(String savePath) {        this.savePath = savePath;    }        }

            

第三种方式

package com.ljq.action;import java.io.File;import java.io.FileInputStream;import java.io.FileOutputStream;import java.util.List;import org.apache.struts2.ServletActionContext;import com.opensymphony.xwork2.ActionSupport;/** * 使用List上传多个文件 *  * @author ljq * */@SuppressWarnings("serial")public class UploadAction3 extends ActionSupport {    private List<File> image; // 上传的文件    private List<String> imageFileName; // 文件名称    private List<String> imageContentType; // 文件类型    private String savePath;    @Override    public String execute() throws Exception {        ServletActionContext.getRequest().setCharacterEncoding("UTF-8");        // 取得需要上传的文件数组        List<File> files = getImage();        if (files != null && files.size() > 0) {            for (int i = 0; i < files.size(); i++) {                FileOutputStream fos = new FileOutputStream(getSavePath() + "\\" + getImageFileName().get(i));                FileInputStream fis = new FileInputStream(files.get(i));                byte[] buffer = new byte[1024];                int len = 0;                while ((len = fis.read(buffer)) > 0) {                    fos.write(buffer, 0, len);                }                fis.close();                fos.close();            }        }        return SUCCESS;    }    public List<File> getImage() {        return image;    }    public void setImage(List<File> image) {        this.image = image;    }    public List<String> getImageFileName() {        return imageFileName;    }    public void setImageFileName(List<String> imageFileName) {        this.imageFileName = imageFileName;    }    public List<String> getImageContentType() {        return imageContentType;    }    public void setImageContentType(List<String> imageContentType) {        this.imageContentType = imageContentType;    }    /**     * 返回上传文件保存的位置     *      * @return     * @throws Exception     */    public String getSavePath() throws Exception {        return ServletActionContext.getServletContext().getRealPath(savePath);    }    public void setSavePath(String savePath) {        this.savePath = savePath;    }}

              

struts.xml配置文件

<?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" />    <constant name="struts.multipart.maxSize" value="10701096"/>        <package name="upload" namespace="/upload" extends="struts-default">        <action name="*_upload" class="com.ljq.action.UploadAction" method="{1}">            <result name="success">/WEB-INF/page/message.jsp</result>        </action>    </package>    <package name="upload1" namespace="/upload1" extends="struts-default">        <action name="upload1" class="com.ljq.action.UploadAction2" method="execute">            <!-- 要创建/image文件夹，否则会报找不到文件 -->            <param name="savePath">/image</param>            <result name="success">/WEB-INF/page/message.jsp</result>        </action>    </package>    <package name="upload2" namespace="/upload2" extends="struts-default">        <action name="upload2" class="com.ljq.action.UploadAction3" method="execute">            <!-- 要创建/image文件夹，否则会报找不到文件 -->            <param name="savePath">/image</param>            <result name="success">/WEB-INF/page/message.jsp</result>        </action>    </package></struts>

           

上传表单页面upload.jsp

<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%><!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"><html>    <head>        <title>文件上传</title>        <meta http-equiv="pragma" content="no-cache">        <meta http-equiv="cache-control" content="no-cache">        <meta http-equiv="expires" content="0">    </head>    <body>        <!-- ${pageContext.request.contextPath}/upload/execute_upload.do -->        <!-- ${pageContext.request.contextPath}/upload1/upload1.do -->        <!-- ${pageContext.request.contextPath}/upload2/upload2.do -->        <!--  -->        <form action="${pageContext.request.contextPath}/upload2/upload2.do" enctype="multipart/form-data" method="post">            文件1:<input type="file" name="image"><br/>            文件2:<input type="file" name="image"><br/>            文件3:<input type="file" name="image"><br/>                <input type="submit" value="上传" />        </form>    </body></html>

显示页面message.jsp

<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%><%@ taglib uri="/struts-tags" prefix="s"%><!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"><html>  <head>        <title>My JSP 'message.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">      </head>    <body>    上传成功  <br/>  <s:debug></s:debug>  </body></html>