Struts2+JXL 下载 Excel 文档

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博客分类：

Spring

ExcelService 业务类

package cn.service;
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.InputStream;
import jxl.Workbook;
import jxl.write.Label;
import jxl.write.WritableSheet;
import jxl.write.WritableWorkbook;
public class ExcelService {
	/**
	 * 调用 JXL 生成 Excel 文件
	 * */
	public InputStream generateExcel(){
		Label label = null;
		WritableWorkbook workbook = null;
		//字节数组的输出流
		ByteArrayOutputStream os = new ByteArrayOutputStream();
		try {
			workbook = Workbook.createWorkbook(os);
			WritableSheet sheet = workbook.createSheet("第 1 页", 0);
			label = new jxl.write.Label(0, 0, "标题");
			sheet.addCell(label);
			label = new jxl.write.Label(0, 1, "数据");
			sheet.addCell(label);
			workbook.write();
			workbook.close();
		} catch (Exception e) {
			e.printStackTrace();
		}
		InputStream is = new ByteArrayInputStream(os.toByteArray());
		return is;
	}
}

ExcelAction 控制类

package cn.action;
import java.io.InputStream;
import cn.service.ExcelService;
import com.opensymphony.xwork2.ActionSupport;
@SuppressWarnings("serial")
public class ExcelAction extends ActionSupport {
	//建立一个输入流对象，用于 Excel 文件下载
	private InputStream inputStream;
	//业务类
	private ExcelService excelService = new ExcelService();
	//调用业务类生成 Excel
	public String execute(){
		this.inputStream = excelService.generateExcel();
		return SUCCESS;
	}
	public InputStream getInputStream() {
		return inputStream;
	}
	public void setInputStream(InputStream inputStream) {
		this.inputStream = inputStream;
	}
	public ExcelService getExcelService() {
		return excelService;
	}
	public void setExcelService(ExcelService excelService) {
		this.excelService = excelService;
	}
}

web.xml 配置

<?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_3_0.xsd"
	version="3.0">
	<display-name>Spring13Struts2Jxl</display-name>
	<listener>
		<listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
	</listener>
	<context-param>
		<param-name>contextConfigLocation</param-name>
		<param-value>classpath:applicationContext.xml</param-value>
	</context-param>
	<filter>
		<filter-name>struts2</filter-name>
		<filter-class>org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter</filter-class>
	</filter>
	<filter-mapping>
		<filter-name>struts2</filter-name>
		<url-pattern>/*</url-pattern>
	</filter-mapping>
</web-app>

applicationContext.xml 配置

<?xml version="1.0" encoding="UTF-8"?>
<beans
	xmlns="http://www.springframework.org/schema/beans"
	xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
	xmlns:p="http://www.springframework.org/schema/p"
	xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.0.xsd">
</beans>

struts.xml 配置

<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE struts 
PUBLIC "-//Apache Software Foundation//DTD Struts Configuration 2.1//EN" 
"http://struts.apache.org/dtds/struts-2.1.dtd">
<struts>
	<package name="cn.action" extends="struts-default" namespace="/">
		<action name="excel" class="cn.action.ExcelAction">
			<result type="stream" name="success">
				<!-- 返回类型是 Excel -->
				<param name="contentType">application/vnd.ms-excel</param>
				<param name="inputName">inputStream</param>
				<!-- 指定下载的文件名 -->
				<param name="contentDisposition">attachment;filename="export.xls"</param>
				<param name="bufferSize">1024</param>
			</result>
		</action>
	</package>
</struts>

index.jsp 页面

<%@ 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>下载文档</title>
</head>
<body>
	下载文档：
	<a href="excel.action">内容</a>
</body>
</html>

效果图：