struts不定文件上传结合我的情况做的修改

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struts1

Struts Web JSP .net XML

以下内容为转自网络,要注意的是jsp页面中<html:form>我名称要正确.还有就是修改了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());
    }
   }
加了for循环,没加之前超过三个文件会报错.

以下是全部内容

Form部分：

public class MultiUploadForm extends ActionForm {
    private List myFiles;
    public MultiUploadForm(){
        myFiles = new ArrayList();
        //为了能够在页面初始显示一个file
        myFiles.add(new UploadFile());
    }
    public List getMyFiles() {
        return myFiles;
    }

//注意这个方法的定义

   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());
    }
   }
    public void setMyFiles(List myFiles) {
        this.myFiles = myFiles;
    }
}

Dataset部分：
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;
    }
}
Action部分：
public class MultiUploadAction extends Action {
    public ActionForward execute(ActionMapping mapping, ActionForm form,
                                 HttpServletRequest request,
                                 HttpServletResponse response) {
        MultiUploadForm multiUploadForm = (MultiUploadForm) form;
        List myFiles = multiUploadForm.getMyFiles();
        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());
            }
        }

        return null;
    }
}

JSP部分：

<%@ page contentType="text/html; charset=GBK" %>
<%@ taglib uri="/WEB-INF/struts-html.tld" prefix="html" %>
<%@ taglib uri="/WEB-INF/struts-nested.tld" prefix="nested" %>

<html:html>
<head>
<title>
multiUploadDemo
</title>
</head>
<script language="javascript" type="">
   var num = 0;
   function addFile(){
      var innerHTML = multiUploadForm.innerHTML;
      var signal = "<TD id=tdTarget>";
      var signalLen = signal.length;
      var targetIndex = innerHTML.indexOf(signal);

      var preHTML = innerHTML.substring(0,(targetIndex-6));
      var subHTML = innerHTML.substring(targetIndex-6);
      num++;
      var insertHTML = "<TR><TD><input type=file name=uploadFile["+ num + "].file value=''></TD>";
      innerHTML = preHTML + insertHTML + subHTML;

      multiUploadForm.innerHTML = innerHTML;
      //alert(multiUploadForm.innerHTML);
   }
   function upload(){
     multiUploadForm.submit();
   }
</script>
<body bgcolor="#ffffff">
<html:form method="post" action="/multiUploadAction.do" enctype="multipart/form-data">
<table border="1">
<TBODY>
<br><br>

this is file
<nested:iterate id="uploadFile" property="myFiles" name="multiUploadForm" indexId="index">
      <nested:nest property="uploadFile">
        <nested:file property="file" name="uploadFile" indexed="true"/>
      </nested:nest>
</nested:iterate>

<TR>
<input type="button" name="btnAddFile" value="Add File" onclick="addFile()"/>
<TR><TD id="tdTarget"></TD>
<input type="button" name="btnUpload" value="upload" onclick="upload()">
</TBODY>
</table>
</html:form>
</body>
</html:html>

struts-config.xml部分：

<form-beans>
    <form-bean name="multiUploadForm" type="MultiUploadForm" />
</form-beans>

<action name="multiUploadForm" path="/multiUploadAction" type="MultiUploadAction" />

以上只是对动态多文件上传部分进行了描述，只是一个Demo。大家可以根据自己的需求变通的调整一下。

肯定大家有更好的方法，欢迎讨论。

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