基于Struts1.2的动态多文件上传

jushi1988

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Struts

Struts Apache Java Web Bean

首先是web.xml配置
<?xml version="1.0" encoding="ISO-8859-1" ?>
<!DOCTYPE web-app PUBLIC "-//Sun Microsystems, Inc.//DTD Web Application 2.3//EN" "http://java.sun.com/dtd/web-app_2_3.dtd">
<web-app>
       <servlet>
           <servlet-name>action</servlet-name>
           <servlet-class>org.apache.struts.action.ActionServlet</servlet-class>
               <init-param>
                 <param-name>config</param-name>
                 <param-value>/WEB-INF/struts-config.xml</param-value>
               </init-param>
           <load-on-startup>2</load-on-startup>
       </servlet>
      <servlet-mapping>
           <servlet-name>action</servlet-name>
           <url-pattern>*.do</url-pattern>
     </servlet-mapping>
</web-app>
然后是struts-config.xml
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE struts-config PUBLIC "-//Apache Software Foundation//DTD Struts Configuration 1.2//EN" "http://struts.apache.org/dtds/struts-config_1_2.dtd">
<struts-config>
<data-sources />
<form-beans >
    <form-bean name="multiUploadForm" type="com.hb.struts.form.MultiUploadForm" />
</form-beans>
<global-exceptions />
<global-forwards />
<action-mappings >
    <action
      attribute="multiUploadForm"
      name="multiUploadForm"
      path="/multiUpload"
      scope="request"
      type="com.hb.struts.action.MultiUploadAction"
      validate="false" />

</action-mappings>
<message-resources parameter="com.hb.struts.ApplicationResources" />
</struts-config>
然后是页面test.jsp,这段就是网上COPY的动态生成页面
<%@ page language="java" pageEncoding="utf-8"%>
<%@ taglib uri="http://jakarta.apache.org/struts/tags-bean" prefix="bean" %>
<%@ taglib uri="http://jakarta.apache.org/struts/tags-html" prefix="html" %>
<%@ taglib uri="http://jakarta.apache.org/struts/tags-logic" prefix="logic" %>
<%@ taglib uri="http://jakarta.apache.org/struts/tags-tiles" prefix="tiles" %>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html:html>
<head>
<title>
multiUploadDemo
</title>
<script language="javascript">
var num = 0;

function upload(){
document.getElementById("status").innerHTML = "文件上传中...";
     multiUploadForm.submit();
   }
function additem(id)
{
var row,cell,str;

row = eval("document.all["+''"''+id+''"''+"]").insertRow();
if(row != null )
    {
       cell = row.insertCell();
       str="<input type="+''"''+"file"+''"''+" name=uploadFile["+ num +"].file><input type="+''"''+"button"+''"''+" value="+''"''+"删除"+''"''+" onclick=''deleteitem(this,"+''"''+"tb"+''"''+");''>"
      cell.innerHTML=str;
    }
num++;
}
function deleteitem(obj,id)
{
var rowNum,curRow;
curRow = obj.parentNode.parentNode;
rowNum = eval("document.all."+id).rows.length - 1;
eval("document.all["+''"''+id+''"''+"]").deleteRow(curRow.rowIndex);
}
function callback(msg)
{
document.getElementById("status").innerHTML = "文件上传完成...<br>" + msg;
}
</script>
<body bgcolor="#ffffff">
<div id="status"></div>
<html:form method="post" action="/multiUpload.do" enctype="multipart/form-data" target="hidden_frame">
<table id="tb">
</table>
<iframe name=''hidden_frame'' id="hidden_frame" style="display:none"></iframe>
<input type="button" name="btnAddFile" value="Add File" onclick="additem(''tb'')"/>
<input type="button" name="btnUpload" value="upload" onclick="upload()"/>
</body>
</html:html>
下面是FORM和ACTION
我把下面2个文件放在FORM包中
UploadFile .java
package com.hb.struts.form;
import java.io.Serializable;
import org.apache.struts.upload.FormFile;
public class UploadFile implements Serializable {
private FormFile file;
     public FormFile getFile() {
             System.out.println("run in uploadFile.getFile()");
             return file;
     }
     public void setFile(FormFile file) {
             this.file = file;
     }
}
MultiUploadForm .java
package com.hb.struts.form;
import java.util.ArrayList;
import java.util.List;
import org.apache.struts.action.ActionForm;
import com.hb.struts.UploadFile;
public class MultiUploadForm extends ActionForm {
private List myFiles;

    public MultiUploadForm(){
            myFiles = new ArrayList();
            myFiles.add(new UploadFile());
    }
    public List getMyFiles() {
            return myFiles;
    }
//注意这个方法的定义不加中间的循环是会出错的
public UploadFile getUploadFile(int index){
            int size = myFiles.size();
            if(index>size-1){
             for(int i=0;i<index-size+1;i++){
                    myFiles.add(new UploadFile());
             }
            }
            return (UploadFile)myFiles.get(index);
    }
    public void setMyFiles(List myFiles) {
            this.myFiles = myFiles;
    }

}
最后是action
package com.hb.struts.action;
import java.io.IOException;
import java.io.PrintWriter;
import java.util.List;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.apache.struts.action.Action;
import org.apache.struts.action.ActionForm;
import org.apache.struts.action.ActionForward;
import org.apache.struts.action.ActionMapping;
import org.apache.struts.upload.FormFile;
public class MultiUploadAction extends Action {
public ActionForward execute(ActionMapping mapping, ActionForm form,
   HttpServletRequest request, HttpServletResponse response) {
MultiUploadForm multiUploadForm = (MultiUploadForm) form;

List myFiles = multiUploadForm.getMyFiles();
String fileStr = "";
for (int i = 0; i < myFiles.size(); i++) {
   UploadFile uploadFile = (UploadFile) myFiles.get(i);
   FormFile file = uploadFile.getFile();
   if (file == null) {
    System.out.println("file is null");
   } else {
    // 能运行到这里，就可以使用单个文件上传的方法进行上传了。循环而已
    System.out.println("filename>>>>>>>>>>" + file.getFileName());
    System.out.println("file size>>>>>>>>>>" + file.getFileSize());
    fileStr += "filename:::" + file.getFileName() + "file size:::"
      + file.getFileSize();
   }
}
// 返回文本
try {
   response.setHeader("ContentType", "text/html;charset=gbk");
   PrintWriter out = response.getWriter();
   out.write("<script>parent.callback(''upload file success" + fileStr
     + "'')</script>");
} catch (IOException e) {
   e.printStackTrace();
}
return null;
}
}

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