strut2 文件上传完整案例

浏览数：39 / 时间：2015年06月09日

之前写的文章都是关键的代码，今天整理好一个完整案例，粘贴可运行。

上传界面：upload.jsp

<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
<%
String path = request.getContextPath();
String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
%>

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
  <head>
    <base href="<%=basePath%>">
    
    <title>My JSP ‘upload.jsp‘ starting page</title>
    
    <meta http-equiv="pragma" content="no-cache">
    <meta http-equiv="cache-control" content="no-cache">
    <meta http-equiv="expires" content="0">    
    <meta http-equiv="keywords" content="keyword1,keyword2,keyword3">
    <meta http-equiv="description" content="This is my page">
    <!--
    <link rel="stylesheet" type="text/css" href="styles.css">
    -->

  </head>
  
  <body>
   <center>
   <form action="upload.action" method="post" enctype="multipart/form-data">
           文件：<input type="file" name="upload"/>
       <input type="submit" value="上传"/>
   </form>

   </center>
  </body>
</html>

action中的代码：FileUploadAction.java

package cn.itcast.action;

import java.io.BufferedInputStream;
import java.io.BufferedOutputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.InputStream;
import java.io.OutputStream;

import org.apache.struts2.ServletActionContext;

import com.opensymphony.xwork2.ActionSupport;

public class FileUploadAction extends ActionSupport{
    
    private String savefile;//通过注入得到上传的路径
    private File upload;
    private String uploadFileName;
    
        
    public File getUpload() {
        return upload;
    }

    public void setUpload(File upload) {
        this.upload = upload;
    }

    public String getUploadFileName() {
        return uploadFileName;
    }

    public void setUploadFileName(String uploadFileName) {
        this.uploadFileName = uploadFileName;
    }

    public String getSavefile() {
        return savefile;
    }

    public void setSavefile(String savefile) {
        this.savefile = savefile;
    }

    //文件拷贝函数
    //src表示源文件，dst表示目标文件
    public static void copy(File src,File dst) throws Exception{
        //定义一个输入流对象，使用缓冲类需要提供一个输入流对象
        InputStream in  = new BufferedInputStream(new FileInputStream(src));
        OutputStream out = new BufferedOutputStream(new FileOutputStream(dst));
        //声明一个字节数组，用来存储读入的数据
        byte[] b = new byte[1024];
        int length=0;
        //循环读取输入流对象，把输入流读到字节数组中，返回读取的字节数长度，如果读到末尾则返回-1
        while(-1!=(length=in.read(b))){
            out.write(b);//讲字节数组的数据写到输出流文件中.
        }
        in.close();  //如果不关闭的话上传的文件将无法正常打开！！
        out.close();
    }
    
    public String execute(){
        String path = ServletActionContext.getServletContext().getRealPath(getSavefile()+"/");
        File parfiFile = new File(path);//目录路径
        if(!parfiFile.exists()){
            parfiFile.mkdir();
        }
        File file = new File(parfiFile, getUploadFileName());//通过父文件+文件名得到一个实际的文件
        if(file.getParent()!=null){
            try {
                copy(upload, file);//调用文件拷贝的方法
                System.out.println("上传成功");
            } catch (Exception e) {
                // TODO Auto-generated catch block
                System.out.println("上传失败");
                e.printStackTrace();
            }
        }
        return "success";
    }
    

}

struts.xml的配置：

<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE struts PUBLIC
    "-//Apache Software Foundation//DTD Struts Configuration 2.0//EN"
    "http://struts.apache.org/dtds/struts-2.0.dtd">

<struts>
    
    <constant name="struts.i18n.encoding" value="utf-8"></constant>
    <constant name="struts.multipart.saveDir" value="F:\"></constant>
    <constant name="struts.multipart.maxSize" value="10240000" />
    <package name="base" extends="struts-default">
           <global-results>
            <result name="message">/WEB-INF/page/message.jsp</result>
        </global-results>
    </package> 
    
    <package name="itcast"  extends="base" >    
        <action name="upload" class="cn.itcast.action.FileUploadAction">
            <interceptor-ref name ="fileUpload">   
            <param name ="allowedTypes" >   
                image/bmp,image/png,image/gif,image/jpeg,
                application/vnd.openxmlformats-officedocument.spreadsheetml.sheet,
                application/vnd.ms-excel,
                application/msword
             </param >   
             <param name="maximumSize">10240000</param>  
         </interceptor-ref>   
         <interceptor-ref name ="defaultStack" /> 
            <param name="savefile">/uploadfile</param><！--注入上传的路径-->
            <result name="success">/index.jsp</result>
        </action>
    </package>
</struts>