struts1.x 文件上传

VincentDrW

2011-01-28

前端jsp代码 upLoad.jsp

<%@ page pageEncoding="GBK"%>
  <%@ taglib uri="http://struts.apache.org/tags-html" prefix="html"%>
  <html>
    <head>
      <title>上传单个文件（文件大小不能超过2M) </title>
    </head>
    <body>
<%-- 在<html:form>标签中必须加enctype="multipart/form-data"  --%>
      <html:form enctype="multipart/form-data" action="uploadfile"> 
        <html:file property="myFile"/><p>  <%-- 使用<html:file>标签让用户输入上传文件名  --%>
        <html:submit value="上传"/>
      </html:form>
    </body>
  </html>

Action端代码 UpLoadAction.java

package com.mocha.xxx.action;

import javax.servlet.http.*;
import org.apache.struts.action.*;
import org.apache.struts.upload.FormFile;
import com.mocha.xxx.form.UploadForm;
import java.io.*; 
public class UploadAction extends Action
{
    protected void saveFile(FormFile formFile,String path) throws Exception
    {
        InputStream in = formFile.getInputStream();   // 获得上传文件的InputStream
        // 在服务端指定的上传路径中建立一个空的文件（文件名为getFileName()方法返回的值）
        String temString= path+"\\image\\" + formFile.getFileName();
        System.out.println(temString);
        FileOutputStream fout = new FileOutputStream(path+"\\image\\" + formFile.getFileName());   
        byte buffer[] = new byte[8192];  
        int count = 0;
        //  开始向上传路径中刚建立的文件写入数据，每次写8k字节
        while ((count = in.read(buffer)) > 0) 
        {
            fout.write(buffer, 0, count);
        }
        fout.close();
        formFile.destroy();   // 上传成功后，销毁当前上传文件的资源
    }
    public ActionForward execute(ActionMapping mapping, ActionForm form,
            HttpServletRequest request, HttpServletResponse response)
    {
        UploadForm uForm = (UploadForm) form;
        PrintWriter out = null;
        try
        {
           
           // String path= this.getServlet().getServletContext().getRealPath("/");
            String path = request.getRealPath("/");
            //System.out.println(path);
            response.setCharacterEncoding("GBK");
            out = response.getWriter();
            saveFile(uForm.getMyFile(),path);  // 将上传文件保存到指写的路径（在web.xml中配置）
            out.println("上传文件成功.");
        }
        catch (Exception e)
        {
            e.printStackTrace();
        }
        return null;
    }
}

ActionForm UploadForm.java

package com.mocha.xxx.form;

import org.apache.struts.action.*;
import org.apache.struts.upload.FormFile;

public class UploadForm extends ActionForm
{  
    private FormFile myFile;  // 这个myFile代表要上传的文件

    public FormFile getMyFile()
    {
        return myFile;
    }
    public void setMyFile(FormFile myFile)
    {
        this.myFile = myFile;
    }
}

struts配置文件

<form-beans>
    <form-bean name="uploadForm" type="com.mocha.xxx.form.UploadForm"></form-bean>
  </form-beans>

    <action
      name="uploadForm"
      parameter="method"
      scope="request"
      path="/uploadfile"
      type="org.springframework.web.struts.DelegatingActionProxy">
      <forward name="index" path="/index.jsp"></forward>
      <forward name="success" path="/index.jsp"></forward>
    </action>

html代码