struts - upload 组件-优快云博客

本文介绍了一个基于Struts2框架实现的文件上传功能。通过使用Struts2提供的上传组件，实现了用户界面的设计、表单验证及文件的实际上传过程。文章详细展示了upload.jsp页面、uploadForm.java表单类及uploadAction.java动作类的代码实现。

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1. upload.jsp

<%@ page language="java" pageEncoding="GB18030"%>

<%@ taglib uri="http://struts.apache.org/tags-bean" prefix="bean" %>
<%@ taglib uri="http://struts.apache.org/tags-html" prefix="html" %>
<%@ taglib uri="http://struts.apache.org/tags-logic" prefix="logic" %>
<%@ taglib uri="http://struts.apache.org/tags-tiles" prefix="tiles" %>

<html:html lang="true">
<head>
    <html:base />

    <title>upload.jsp</title>
</head>

<body>
  <html:form action="upload.do" method="post" enctype="multipart/form-data">//文件的类型
   输入文件的名称：<html:text property="name"></html:text>
   选择上传的组件：<html:file property="pic"></html:file>//以file传输
   <html:submit value="上传"></html:submit>
  </html:form>
</body>
</html:html>

2.uploadForm.java

/*
* Generated by MyEclipse Struts
* Template path: templates/java/JavaClass.vtl
*/
package cn.alex.struts.form;

import javax.servlet.http.HttpServletRequest;

import org.apache.struts.action.ActionErrors;
import org.apache.struts.action.ActionForm;
import org.apache.struts.action.ActionMapping;
import org.apache.struts.upload.FormFile;

/**
* MyEclipse Struts
* Creation date: 04-09-2008
*
* XDoclet definition:
* @struts.form name="uploadForm"
*/
public class UploadForm extends ActionForm {
/*
* Generated Methods
*/
private FormFile pic;
private String name;
/**
* Method validate
* @param mapping
* @param request
* @return ActionErrors
*/
public ActionErrors validate(ActionMapping mapping,
   HttpServletRequest request) {
  // TODO Auto-generated method stub
  return null;
}

/**
* Method reset
* @param mapping
* @param request
*/
public void reset(ActionMapping mapping, HttpServletRequest request) {
// TODO Auto-generated method stub
}

public FormFile getPic() {
return pic;
}

public void setPic(FormFile pic) {
this.pic = pic;
}

public String getName() {
return name;
}

public void setName(String name) {
this.name = name;
}
}

3.uploadAction.java

/*
* Generated by MyEclipse Struts
* Template path: templates/java/JavaClass.vtl
*/
package cn.alex.struts.action;

import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.OutputStream;

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;

import cn.alex.struts.form.UploadForm;

/**
* MyEclipse Struts
* Creation date: 04-09-2008
*
* XDoclet definition:
* @struts.action path="/upload" name="uploadForm" input="/form/upload.jsp" scope="request" validate="true"
*/
public class UploadAction extends Action {
/*
* Generated Methods
*/

/**
* Method execute
* @param mapping
* @param form
* @param request
* @param response
* @return ActionForward
*/
public ActionForward execute(ActionMapping mapping, ActionForm form,
   HttpServletRequest request, HttpServletResponse response) {
  UploadForm uploadForm = (UploadForm) form;// TODO Auto-generated method stub
  String uploadPath = this.getServlet().getServletContext().getRealPath("/")+"upload//"+uploadForm.getName()+"."+(uploadForm.getPic().getFileName().split("//.")[1]);    //获得路径

/* String uploadPath = this.getServlet().getServletContext().getRealPath("/")+"upload//"+uploadForm.getPic().getFileName(); 不改变文件名字*/
    try {
   OutputStream out = new FileOutputStream(new File(uploadPath));//准备以流传输
   FormFile ff = uploadForm.getPic();//找到要传输的文件
   byte b[] = ff.getFileData(); //以字节数组传输
   out.write(b);
   out.close();//关闭
  } catch (FileNotFoundException e) {
   // TODO Auto-generated catch block
   e.printStackTrace();
  } catch (IOException e) {
   // TODO Auto-generated catch block
   e.printStackTrace();
  }
  return null;
}
}