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SSH+JXL 下载 Excel 文档

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Emp 实体类和映射文件

package cn.entity;
import java.util.Date;
@SuppressWarnings("serial")
public class Emp implements java.io.Serializable {
	private Integer empno;
	private String ename;
	private String job;
	private Integer mgr;
	private Date hiredate;
	private Double sal;
	private Double comm;
	private Integer deptno;
	@Override  
	public String toString() {  
		return "Emp [empno=" + empno + ", ename=" + ename + ", job=" + job  
				+ ", mgr=" + mgr + ", hiredate=" + hiredate + ", sal=" + sal  
				+ ", comm=" + comm + ", deptno=" + deptno + "]";  
	}  
	public Emp() {  
	}  
	public Emp(String ename, String job, Integer mgr, Date hiredate,  
			Double sal, Double comm, Integer deptno) {  
		this.ename = ename;  
		this.job = job;  
		this.mgr = mgr;  
		this.hiredate = hiredate;  
		this.sal = sal;  
		this.comm = comm;  
		this.deptno = deptno;  
	}  
	public Emp(Integer empno, String ename, String job, Integer mgr,  
			Date hiredate, Double sal, Double comm, Integer deptno) {  
		this.empno = empno;  
		this.ename = ename;  
		this.job = job;  
		this.mgr = mgr;  
		this.hiredate = hiredate;  
		this.sal = sal;  
		this.comm = comm;  
		this.deptno = deptno;  
	}  
	public Integer getEmpno() {  
		return empno;  
	}  
	public void setEmpno(Integer empno) {  
		this.empno = empno;  
	}  
	public String getEname() {  
		return ename;  
	}  
	public void setEname(String ename) {  
		this.ename = ename;  
	}  
	public String getJob() {  
		return job;  
	}  
	public void setJob(String job) {  
		this.job = job;  
	}  
	public Integer getMgr() {  
		return mgr;  
	}  
	public void setMgr(Integer mgr) {  
		this.mgr = mgr;  
	}  
	public Date getHiredate() {  
		return hiredate;  
	}  
	public void setHiredate(Date hiredate) {  
		this.hiredate = hiredate;  
	}  
	public Double getSal() {  
		return sal;  
	}  
	public void setSal(Double sal) {  
		this.sal = sal;  
	}  
	public Double getComm() {  
		return comm;  
	}  
	public void setComm(Double comm) {  
		this.comm = comm;  
	}  
	public Integer getDeptno() {  
		return deptno;  
	}  
	public void setDeptno(Integer deptno) {  
		this.deptno = deptno;  
	}  
}

 

<?xml version="1.0" encoding="utf-8"?>
<!DOCTYPE hibernate-mapping PUBLIC "-//Hibernate/Hibernate Mapping DTD 3.0//EN"
"http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd">
<!-- Mapping file autogenerated by MyEclipse Persistence Tools -->
<hibernate-mapping>
	<class name="cn.entity.Emp" table="EMP" schema="SCOTT">
		<id name="empno" type="java.lang.Integer">
			<column name="EMPNO" precision="4" scale="0" />
			<generator class="sequence">
				<param name="sequence">seq_emp</param>
			</generator>
		</id>
		<property name="ename" type="java.lang.String">
			<column name="ENAME" length="10" />
		</property>
		<property name="job" type="java.lang.String">
			<column name="JOB" length="9" />
		</property>
		<property name="mgr" type="java.lang.Integer">
			<column name="MGR" precision="4" scale="0" />
		</property>
		<property name="hiredate" type="java.util.Date">
			<column name="HIREDATE" length="7" />
		</property>
		<property name="sal" type="java.lang.Double">
			<column name="SAL" precision="7" />
		</property>
		<property name="comm" type="java.lang.Double">
			<column name="COMM" precision="7" />
		</property>
		<property name="deptno" type="java.lang.Integer">
			<column name="DEPTNO" precision="2" scale="0" />
		</property>
	</class>
</hibernate-mapping>

 

EmpDao DAO类

package cn.dao;
import java.util.List;
import cn.entity.Emp;
public interface EmpDao {
	List<Emp> findAll();  
}

 

package cn.dao.impl;
import java.util.List;
import org.springframework.orm.hibernate3.support.HibernateDaoSupport;
import cn.dao.EmpDao;
import cn.entity.Emp;
public class EmpDaoImpl extends HibernateDaoSupport implements EmpDao {
	@SuppressWarnings("unchecked")
	@Override
	public List<Emp> findAll() {
		return super.getHibernateTemplate().find("from Emp");
	}
}

 

EmpBiz 业务类

package cn.biz;
import java.util.List;
import cn.entity.Emp;
public interface EmpBiz {
	List<Emp> findAll();  
}

 

package cn.biz.impl;
import java.util.List;
import cn.biz.EmpBiz;
import cn.dao.EmpDao;
import cn.entity.Emp;
public class EmpBizImpl implements EmpBiz {
	private EmpDao empDao;
	public void setEmpDao(EmpDao empDao) {
		this.empDao = empDao;
	}
	@Override
	public List<Emp> findAll() {
		return empDao.findAll();
	}
}

 

ExcelAction 控制类

package cn.action;
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.InputStream;
import java.util.List;

import jxl.Workbook;
import jxl.write.Label;
import jxl.write.WritableFont;
import jxl.write.WritableSheet;
import jxl.write.WritableWorkbook;
import cn.biz.EmpBiz;
import cn.entity.Emp;

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 EmpBiz empBiz;
	private InputStream inputStream;
	//调用业务类生成 Excel
	public String execute(){
		List<Emp> emps = this.empBiz.findAll();
		this.inputStream = generateExcel(emps);
		return SUCCESS;
	}
	/**
	 * 调用 JXL 生成 Excel 文件
	 * */
	private static InputStream generateExcel(List<Emp> emps){
		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);
			sheet.mergeCells(0, 0, 3, 0);
			jxl.write.WritableFont wf = new jxl.write.WritableFont(WritableFont.ARIAL,14,WritableFont.BOLD,false,  
                    jxl.format.UnderlineStyle.NO_UNDERLINE,jxl.format.Colour.GREEN);  
            jxl.write.WritableCellFormat wfC = new jxl.write.WritableCellFormat(wf); 
			label = new jxl.write.Label(0, 0, "Emp 列表",wfC);
			sheet.addCell(label);
			int count = 1;
			jxl.write.WritableFont wfF = new jxl.write.WritableFont(WritableFont.ARIAL,12,WritableFont.BOLD,false,  
                    jxl.format.UnderlineStyle.NO_UNDERLINE,jxl.format.Colour.BLUE2); 
			jxl.write.WritableCellFormat wfFC = new jxl.write.WritableCellFormat(wfF); 
			for (Emp emp : emps) {
				jxl.write.Number number = new jxl.write.Number(0 ,count ,emp.getEmpno());  
				sheet.addCell(number);
				label = new jxl.write.Label(1 ,count ,emp.getEname(),wfFC);
				sheet.addCell(label);
				label = new jxl.write.Label(2 ,count ,emp.getJob(),wfFC);
				sheet.addCell(label);
				++count;
			}
			workbook.write();
			workbook.close();
		} catch (Exception e) {
			e.printStackTrace();
		}
		InputStream is = new ByteArrayInputStream(os.toByteArray());
		return is;
	}
	public InputStream getInputStream() {
		return inputStream;
	}
	public void setInputStream(InputStream inputStream) {
		this.inputStream = inputStream;
	}
	public EmpBiz getEmpBiz() {
		return empBiz;
	}
	public void setEmpBiz(EmpBiz empBiz) {
		this.empBiz = empBiz;
	}
}

 

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:aop="http://www.springframework.org/schema/aop"
	xmlns:p="http://www.springframework.org/schema/p" 
	xmlns:tx="http://www.springframework.org/schema/tx"
	xmlns:context="http://www.springframework.org/schema/context"
	xsi:schemaLocation="http://www.springframework.org/schema/beans 
	http://www.springframework.org/schema/beans/spring-beans-3.0.xsd
	http://www.springframework.org/schema/aop 
	http://www.springframework.org/schema/aop/spring-aop-3.0.xsd
	http://www.springframework.org/schema/tx 
	http://www.springframework.org/schema/tx/spring-tx-3.0.xsd
	http://www.springframework.org/schema/context 
	http://www.springframework.org/schema/context/spring-context-3.0.xsd">
	<!-- 数据源配置 -->
	<bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource">
		<property name="driverClassName" value="oracle.jdbc.OracleDriver" />
		<property name="url" value="jdbc:oracle:thin:@localhost:1521:oracle11" />
		<property name="username" value="scott" />
		<property name="password" value="tiger" />
	</bean>
	<!-- 会话工厂 -->
	<bean id="sessionFactory"
		class="org.springframework.orm.hibernate3.LocalSessionFactoryBean">
		<property name="dataSource">
			<ref bean="dataSource" />
		</property>
		<property name="hibernateProperties">
			<props>
				<prop key="hibernate.dialect">
					org.hibernate.dialect.Oracle10gDialect
				</prop>
				<prop key="hibernate.show_sql">
					true
				</prop>
			</props>
		</property>
		<property name="mappingResources">
			<list>
				<value>cn/entity/Emp.hbm.xml</value>
			</list>
		</property>
	</bean>
	<!-- 配置事务管理器 -->
	<bean id="txManager"
		class="org.springframework.orm.hibernate3.HibernateTransactionManager">
		<property name="sessionFactory">
			<ref bean="sessionFactory" />
		</property>
	</bean>
	<!-- 配置事务的传播特性 -->
	<tx:advice id="txAdvice" transaction-manager="txManager">
		<tx:attributes>
			<tx:method name="add*" propagation="REQUIRED" />
			<tx:method name="submit*" propagation="REQUIRED" />
			<tx:method name="save*" propagation="REQUIRED" />
			<tx:method name="insert*" propagation="REQUIRED" />
			<tx:method name="del*" propagation="REQUIRED" />
			<tx:method name="remove*" propagation="REQUIRED" />
			<tx:method name="update*" propagation="REQUIRED" />
			<tx:method name="modify*" propagation="REQUIRED" />
			<tx:method name="check*" propagation="REQUIRED" />
			<tx:method name="do*" propagation="REQUIRED" />
			<tx:method name="deal*" propagation="REQUIRED" />
			<tx:method name="get*" propagation="SUPPORTS" read-only="true" />
			<tx:method name="find*" propagation="SUPPORTS" read-only="true" />
			<tx:method name="search*" propagation="SUPPORTS" read-only="true" />
			<tx:method name="query*" propagation="SUPPORTS" read-only="true" />
			<tx:method name="*" propagation="SUPPORTS" read-only="true" />
		</tx:attributes>
	</tx:advice>
	<!-- 那些类的哪些方法参与事务 -->
	<aop:config>
		<aop:pointcut id="serviceMethod" expression="execution(* cn.biz.*.*(..))" />
		<aop:advisor advice-ref="txAdvice" pointcut-ref="serviceMethod" />
	</aop:config>
	<!-- 配置DAO -->
	<bean id="empDao" class="cn.dao.impl.EmpDaoImpl">
		<property name="sessionFactory" ref="sessionFactory" />
	</bean>
	<!-- 配置服务层 -->
	<bean id="empBiz" class="cn.biz.impl.EmpBizImpl">
		<property name="empDao" ref="empDao"></property>
	</bean>
	<!-- 配置控制层 -->
	<bean id="excelAction" class="cn.action.ExcelAction" scope="prototype">
		<property name="empBiz" ref="empBiz"></property>
	</bean>
</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：

 

 

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