Struts2实现单文件上传


首先配置一下web.xml

<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
	xmlns="http://java.sun.com/xml/ns/javaee" xmlns:web="http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd"
	xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd"
	id="WebApp_ID" version="2.5">

	<filter>
		<filter-name>struts2</filter-name>
		<filter-class>org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter</filter-class>
		<init-param>
			<param-name>config</param-name>
			<param-value>struts-default.xml,struts-plugin.xml,../struts.xml</param-value>
		</init-param>
	</filter>
	<filter-mapping>
		<filter-name>struts2</filter-name>
		<url-pattern>/*</url-pattern>
	</filter-mapping>
	
</web-app>


新建一个上传页面:upload.jsp

<%@ page language="java" contentType="text/html; charset=UTF-8"
	pageEncoding="UTF-8"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title></title>
</head>
<body>
	<form action="upload.action" method="post" enctype="multipart/form-data">
		file:<input type="file" name="file" /><br>
			 <input type="submit" value="submit"/>
	</form>
</body>
</html>


UploadAction.java:

package com.struts2.action;

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;

public class UploadAction extends ActionSupport {

	private static final long serialVersionUID = 1L;

	/** 文件 */
	private File file;

	/** 文件名 */
	private String fileFileName;

	/** 文件类型 */
	private String fileContentType;

	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;
	}

	@Override
	public String execute() throws Exception {

		String uploadPath = ServletActionContext.getServletContext()
				.getRealPath("/upload");

		InputStream is = new FileInputStream(file);
		OutputStream os = new FileOutputStream(new File(uploadPath,
				this.fileFileName));

		int length = 0;
		byte[] buffer = new byte[1024];
		while (-1 != (length = is.read(buffer))) {
			os.write(buffer, 0, length);
		}
		is.close();
		os.close();

		return SUCCESS;
	}
}


上传成功后的页面uploadResult.jsp:

<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title></title>
</head>
<body>
	upload successfully!
</body>
</html>


最后配置一下struts.xml

<?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 name="struts.multipart.maxSize" value="104857600" />

	<package name="struts2" extends="struts-default">

		<!-- 单文件上传 -->
		<action name="upload" class="com.struts2.action.UploadAction">
			<result name="success">/uploadResult.jsp</result>
		</action>

	</package>


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