Struts2文件上传

minejava

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博客分类：

Struts2

Struts Java JSP Apache HTML

开发工具：Myeclipse6.5

web容器：Tomcat6

使用框架：Struts2.1.8

引入jar包（在Struts2的源码包里可以找到struts-2.1.8.1\lib）：

上传页代码upload.jsp

<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
	<head>
		<title>My JSP 'upload.jsp' starting page</title>
        </head>
<body>
	<center>
            <form action="upload.action" method="POST" enctype="multipart/form-data">
	        文件标题：<input type="text" name="title" size="50" />
				<br />
		选择文件：	<input type="file" name="upload" size="50" />
				<br />
				<input type="submit" value=" 上传 " />
	    </form>
        </center>
</body>
</html>

action代码，UploadAction.java

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

import org.apache.struts2.ServletActionContext;

import com.opensymphony.xwork2.ActionSupport;

public class UploadAction extends ActionSupport {
private static final int BUFFER_SIZE = 16*1024;
	private String title;
	private File upload;
	private String uploadFileName;
	private String imageName;
	private String uploadContentType;
	private String savePath;
	public String getTitle() {
		return title;
	}
	public void setTitle(String title) {
		this.title = title;
	}
	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 getUploadContentType() {
		return uploadContentType;
	}
	public void setUploadContentType(String uploadContentType) {
		this.uploadContentType = uploadContentType;
	}
	public String getSavePath() {
		return savePath;
	}
	public void setSavePath(String savePath) {
		this.savePath = savePath;
	}
	public static void copy(File src, File dst){
		InputStream in = null;
		OutputStream out = null;
		try {
			in = new BufferedInputStream(new FileInputStream(src), BUFFER_SIZE);
			out = new BufferedOutputStream(new FileOutputStream(dst),BUFFER_SIZE);
			byte[] buffer = new byte[BUFFER_SIZE];
			int len = 0;
			while((len = in.read(buffer)) > 0){
				out.write(buffer, 0, len);
			}
		} catch (Exception e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		} finally {
			if(null != in){
				try{
					in.close();
				}catch(IOException e){
					e.printStackTrace();
				}
			}
			if (null != out) {
                try {
                    out.close();
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
		}
	}
        public String execute() throws Exception{		
		String dstPath = ServletActionContext.getServletContext()
                                          .getRealPath(this.getSavePath()) + "\\" + this.getUploadFileName();		
		System.out.print("上传的文件的类型：" + this.getUploadContentType());
		File dstFile = new File(dstPath);
		copy(this.upload,dstFile);
		return SUCCESS;
	}
}

上传成功跳转页showUpload.jsp

<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
<%@ taglib prefix="s" uri="/struts-tags"%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
	<head>
		<title>My JSP 'showUpload.jsp' starting page</title>
	</head>
	<body>
		<div style ="padding: 3px; border: solid 1px #cccccc; text-align: center" >
        <img src ='upload/<s:property value ="uploadFileName" /> ' />
        <br>
        <s:property value = "title"/> 
    </div >
	</body>
</html>

struts.xml配置文件：

<?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.devMode" value="true" />

   <package name="default" namespace="/" extends="struts-default">
          <action name="upload" class = "com.wang.action.UploadAction">
		<param name="savePath" >/upload</param>
		<result name= "success">/showUpload.jsp</result>
	</action>
   </package>
</struts>