上传图片的问题？？

不知到你用的是Struts1还是2
给你一个1的列子
jsp页面代码
<%@ page contentType="text/html; charset=GBK"%>
<%@ taglib uri="http://struts.apache.org/tags-html" prefix="html" %>
<%@ taglib uri="http://struts.apache.org/tags-logic" prefix="logic" %>
<html>
<head>
    <title>multiUploadDemo</title>
</head>
<script language="javascript" >
    function addFile(){
        var Rows=tableFiles.rows;//类似数组的Rows
        var newRow=tableFiles.insertRow(tableFiles.rows.length);//插入新的一行
         var Cells=newRow.cells;//类似数组的Cells
        var newCell=Rows(newRow.rowIndex).insertCell(Cells.length);
        newCell.align="center";
        newCell.innerHTML= "<input type=file name=uploadFile["+ (tableFiles.rows.length-1) + "].file value=''/>"
    }    function delFile(){
        if (tableFiles.rows.length > 1){
            tableFiles.deleteRow(tableFiles.rows.length-1);
        }
    }
    function deleteOtherFiles(){
        while(tableFiles.rows.length > 1){
            tableFiles.deleteRow(tableFiles.rows.length-1);
        }
    }
   function setAddDelBtnDisplay(){
           var objChkFolder = document.getElementById("chkUploadFolder");
           var objBtn = document.getElementById("RowAddDelBtn");
           if(objChkFolder.checked){
               objBtn.style.display="";
           }else{
            deleteOtherFiles();
               objBtn.style.display="none";
           }
}
   function upload(){
     multiUploadForm.submit();
   }
</script>
<body bgcolor="#ffffff">
    <html:form method="post" action="/multiUploadAction.do" enctype="multipart/form-data">
        <table border="1">
            <TBODY>
            <tr>
                <td>
                    上传文件(<input name="chkUploadFolder" type="checkbox" onclick="setAddDelBtnDisplay();"/>多文件或文件夹)
                </td>
            </tr>
            <tr>
                <td>
                    <table id="tableFiles">
                         <logic:iterate id="uploadFile" name="multiUploadForm" property="myFiles">
                         <tr>
                                    <td>
                                        <html:file property="file" name="uploadFile" indexed="true" onchange="javascript:alert('onchange()')"/>
                                    </td>
                                </tr>
                         </logic:iterate>
                    </table>
                </td>
            </tr>
            <TR id ="RowAddDelBtn" style="display: none;">
                <td align="center">
                    <table>
                        <tr>
                            <td>
                                文件夹名：<input type="text" name="folderName" size="10"/>
                            </td>
                            <td>
                                <input type="button" name="btnAddFile" value="Add File" onclick="addFile()" />
                            </td>
                            <td>
                                <input type="button" name="btnAddFile" value="Del File" onclick="delFile()" />
                            </td>
                        </tr>
                    </table>
                </td>
            </TR>
            <TR>
                <td>
                    <input type="button" name="btnUpload" value="upload" onclick="upload()">
                </td>
            </TR>
            </TBODY>
        </table>
    </html:form>
</body>
</html>
配置文件
  <form-beans>
   <form-bean name="multiUploadForm" type="test.MultiUploadForm" />
  </form-beans>
  <global-exceptions />
  <global-forwards />

  <action-mappings>
   <action name="multiUploadForm" path="/multiUploadAction" type="test.MultiUploadAction" />
  </action-mappings>
form表单
package test;import java.util.ArrayList;
import java.util.List;import org.apache.struts.action.ActionForm;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) {//得到页面上数组大小n，新建n个UploadFile并且添加到List中
        int size = myFiles.size();
        if (index > size - 1) {
            for (int i = 0; i < index - size + 1; i++) {//等于 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;
    }
}
action是
package test;import java.io.File;
import java.io.FileOutputStream;
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();
   try
   {
    for (int i = 0; i < myFiles.size(); i++)
    {
     UploadFile uploadFile = (UploadFile) myFiles.get(i);
     FormFile file = uploadFile.getFile();
     String fileName = file.getFileName();
     String filePath = getServlet().getServletContext().getRealPath(
       "/")
       + "upload";
     /* Save file on the server */
     if (!fileName.equals(""))
     {
      System.out.println("Server path:" + filePath);
      //Create file
      File fileToCreate = new File(filePath, fileName);
      //If file does not exists create file
      if (!fileToCreate.exists())
      {
       FileOutputStream fileOutStream = new FileOutputStream(
         fileToCreate);
       fileOutStream.write(file.getFileData());
       fileOutStream.flush();
       fileOutStream.close();
      }
     }
     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());
     }
    }
   } catch (Exception e)
   {
    e.printStackTrace();
   }
   return null;
}
}
可以实现多个图片上传
别忘了导
comments-fileupload.jarstruts2上传也很简单，在action中配置相应的属性，就不多说了
//注意这个方法的定义
  public UploadFile getUploadFile(int index) {//得到页面上数组大小n，新建n个UploadFile并且添加到List中
  int size = myFiles.size();
  if (index > size - 1) {
  for (int i = 0; i < index - size + 1; i++) {//等于 for(int i=0;i<index-(size-1);i++)
  myFiles.add(new UploadFile());
  }
  }这个UploadFile是哪儿的文件呀

调试易

上传图片的问题？？

解决方案 »