Struts2处理文件上传

最新推荐文章于 2024-04-17 16:39:21 发布

最新推荐文章于 2024-04-17 16:39:21 发布 · 118 阅读

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#Java #Struts #JSP #OS #XML

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本文介绍使用Struts2框架实现单个文件上传的过程。包括所需依赖、前端表单设计、后端处理逻辑及配置文件说明。

一.处理单个文件的上传操作
需要的jar包：
commons-io-1.3.2.jar
commons-fileupload-1.2.1.jar
及Struts的jar包

1.fileUpload.jsp


 <body>
    <form action="fileUpload.action" method="post" enctype="multipart/form-data">
    username: <input type="text" name="username"><br>
    file: <input type="file" name="file"><br>
    <input type="submit" value="submit">
    </form>
  </body>

2.FileUploadAction


package com.eric.struts2;

import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.InputStream;
import java.io.OutputStream;

import org.apache.struts2.ServletActionContext;

import com.opensymphony.xwork2.ActionSupport;

/**
 * 
 * @author eric 上传单个文件
 */
public class UploadAction extends ActionSupport {
	private String username;
	// 获取上传的文件名称：file为前台jsp中 input type=file 的name值
	private File file;
	// 获取上传的文件名称：固定格式 file + FileName
	private String fileFileName;
	// 获取上传的文件类型mime类型：固定格式 file + ContentType
	private String fileContentType;
         //file.getName()方法得到的是上传的临时文件的名字
	public String getUsername() {
		return username;
	}
	public void setUsername(String username) {
		this.username = username;
	}
	public File getFile() {
		return file;
	}
	public void setFile(File file) {
		this.file = file;
	}
	public String getFileFileName() {
		return fileFileName;
	}
	public void setFileFileName(String fileFileName) {
		this.fileFileName = fileFileName;
	}
	public String getFileContentType() {
		return fileContentType;
	}
	public void setFileContentType(String fileContentType) {
		this.fileContentType = fileContentType;
	}
	/**
	 * 处理文件上传的方法
	 */
	@Override
	public String execute() throws Exception {
		//取得存放上传文件的目录路径
		String root = ServletActionContext.getRequest().getRealPath("/upload");
		//文件上传，IO操作，写到磁盘目录中去
		InputStream is = new FileInputStream(file);
		System.out.println("path: " + file.getAbsolutePath());
		System.out.println("file: " + file.getName());
		System.out.println("fileFileName: " + fileFileName);
		File destFile = new File(root, fileFileName);
		OutputStream os = new FileOutputStream(destFile);
		byte[] buffer = new byte[400];
		int length = 0;
		while (-1 != (length = is.read(buffer))) {
			os.write(buffer, 0, length);
			//Thread.sleep(1000);
		}
		is.close();
		os.close();
		return SUCCESS;
	}
}

3.struts.xml


<action name="fileUpload" class="com.eric.struts2.UploadAction">
			<result name="success">/fileUploadResult.jsp</result>
		</action>

4.fileUploadResult.jsp


<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
<%@ taglib prefix="s" uri="/struts-tags" %>
<%
String path = request.getContextPath();
String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
%>
  <body>
    username: <s:property value="username"/><br>
    name:<s:property value="fileFileName"/><br>
    type:<s:property value="fileContentType"/>
  </body>