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Struts2的上传

Posted on 2012-02-28 11:24 viery 阅读(245) 评论(0)  编辑  收藏 所属分类: Struts2
Struts2自带上传下载的实现：
1.编写输入页面和结果页面
input.jsp
<%@ page language="java" import="java.util.*" pageEncoding="GB18030"%>
<%@ 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%>">
    
    <title>My JSP 'index.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">
    -->
    
    <script language="JavaScript">
    function addComponent()
    {
        var td=document.getElementById("files");
        var br=document.createElement("<br>");
        var input=document.createElement("input");
        var button=document.createElement("input");

        input.name="uploads";
        input.type="file";

        button.type="button";
        button.value="删除";
        button.onclick=function(){
            td.removeChild(br);
            td.removeChild(input);
            td.removeChild(button);
        }
        td.appendChild(br);
        td.appendChild(input);
        td.appendChild(button);

      
    }


    </script>

    
  </head>
  
  <body>
     <input type="button" onclick="addComponent();" value="添加文件" />
        <br />
        <form onsubmit="return true;" action="upload"
            method="post" enctype="multipart/form-data">
            <table>
            <tr>
            <td id="files">
          <input type='file' name='uploads' />
            </td>
           </tr>
           </table>
       
            <input type="submit" value="上传" />
        </form>
      <s:fielderror/>
  </body>
</html>
js用于自动生成和控制删除上传控件的数量。
result.jsp
 
  <body>
    This a struts page. <br>
  </body>

2.配置struts.xml


<?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>
    <constant name="struts.custom.i18n.resources" value="message"></constant>
    <constant name="struts.i18n.encoding" value="gbk"/>
    <constant name="struts.multipart.saveDir" value="f:\"/>
    <constant name="struts.multipart.maxSize" value="2097152000"/>
    <package name="JsUpload" extends="struts-default">
        <action name="upload" class="org.vle.action.UploadAction">
            <result>/result.jsp</result>
            <result name="input">/upload.jsp</result>
            <interceptor-ref name="fileUpload">
                <param name="maximumSize">10240000</param>
                <param name="allowedTypes">application/vnd.ms-powerpoint</param>
            </interceptor-ref>
            <interceptor-ref name="defaultStack"></interceptor-ref>
        </action>
    </package>

</struts>

3实现action



package org.vle.action;

import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.InputStream;
import java.io.OutputStream;
import java.util.Iterator;
import java.util.List;

import org.apache.struts2.ServletActionContext;

import com.opensymphony.xwork2.Action;
import com.opensymphony.xwork2.ActionSupport;

public class UploadAction extends ActionSupport {
    
    private List<File> uploads;
    private List<String> uploadsFileName;
    private List<String>  uploadsContentType;

    

    public List<String> getUploadsContentType() {
        return uploadsContentType;
    }

    public void setUploadsContentType(List<String> uploadsContentType) {
        this.uploadsContentType = uploadsContentType;
    }

    public List<File> getUploads() {
        return uploads;
    }

    public void setUploads(List<File> uploads) {
        this.uploads = uploads;
    }

    



    public List<String> getUploadsFileName() {
        return uploadsFileName;
    }

    public void setUploadsFileName(List<String> uploadsFileName) {
        this.uploadsFileName = uploadsFileName;
    }



    @Override
    public String execute() throws Exception {
        
            for(int i=0;i<uploads.size();i++){
                InputStream is=new FileInputStream(uploads.get(i));
                String name=uploadsFileName.get(i);
                String type=uploadsContentType.get(i);
                System.out.println(type);
                String path=ServletActionContext.getRequest().getRealPath("/temp");
                File f=new File(path,name);
                File temp=new File(path);
                if(!temp.exists()){
                    temp.mkdirs();
                }
                OutputStream os=new FileOutputStream(f);
                byte[] b=new byte[1024];
                int len;
                while((len=is.read(b))>0){
                    os.write(b, 0, len);
                }
                os.close();
                is.close();
            }
            
    
        
        
        return Action.SUCCESS;
    }
}



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