java利用jxl导出excel表格

java利用jxl导出excel表格

不多说，直接上代码

1、实体类Student

package com.model;

public class Student {
	
	private int id;
	private String userName;
	private int age;
	
	public Student() {
	}
	public Student(int id, String userName, int age) {
		this.id = id;
		this.userName = userName;
		this.age = age;
	}
	public int getId() {
		return id;
	}
	public void setId(int id) {
		this.id = id;
	}
	public String getUserName() {
		return userName;
	}
	public void setUserName(String userName) {
		this.userName = userName;
	}
	public int getAge() {
		return age;
	}
	public void setAge(int age) {
		this.age = age;
	}
	@Override
	public String toString() {
		return "Student [age=" + age + ", id=" + id + ", userName=" + userName
				+ "]";
	}

}

 2、数据访问对象类（采用List模拟数据库）StudentDao

package com.dao;

import java.util.ArrayList;
import java.util.List;

import com.model.Student;
/**
 * @author kangkang.tao
 */
public class StudentDao {
	
	public final static List<Student> allStudents = new ArrayList<Student>();
	// 初始化数据，相当于数据库
	static{
		allStudents.add(new Student(1,"康康",23));
		allStudents.add(new Student(2,"积木",12));
		allStudents.add(new Student(3,"凯南",15));
		allStudents.add(new Student(4,"gina",16));
		allStudents.add(new Student(5,"jim",10));
		allStudents.add(new Student(6,"tamy",14));
		allStudents.add(new Student(7,"anni",20));
		allStudents.add(new Student(8,"pile",10));
		allStudents.add(new Student(9,"amy",23));
		allStudents.add(new Student(10,"temy",22));
		allStudents.add(new Student(11,"kill",15));
		allStudents.add(new Student(12,"jane",16));
		allStudents.add(new Student(13,"kang",17));
	}
	
	// 查询所有
	public List<Student> getAll(){
		return allStudents;
	}
}

 3、servlet

package com.servlet;

import java.io.IOException;
import java.io.OutputStream;
import java.util.List;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import jxl.Workbook;
import jxl.format.Border;
import jxl.format.BorderLineStyle;
import jxl.format.Colour;
import jxl.write.Label;
import jxl.write.WritableCellFormat;
import jxl.write.WritableSheet;
import jxl.write.WritableWorkbook;

import com.dao.StudentDao;
import com.model.Student;


public class ExportServlet extends HttpServlet {

	private static final long serialVersionUID = 1L;
	private StudentDao dao = new StudentDao();

	protected void doGet(HttpServletRequest request, HttpServletResponse response)
			throws ServletException, IOException {
		this.doPost(request, response);
	}

	protected void doPost(HttpServletRequest request, HttpServletResponse response)
			throws ServletException, IOException {
		OutputStream os = response.getOutputStream();// 取得输出流   
        response.reset();// 清空输出流  

        response.setHeader("Content-disposition", "attachment; filename=studentList.xls");// 设定输出文件头   
        response.setContentType("application/msexcel");// 定义输出类型 
        
        
		WritableWorkbook book = null;
		try {
			 // 打开文件
            book = Workbook.createWorkbook(os);
            
            WritableCellFormat  wcf = new WritableCellFormat(); 
            wcf.setAlignment(jxl.format.Alignment.CENTRE);
            wcf.setBorder(Border.ALL, BorderLineStyle.THIN);
            wcf.setBackground(Colour.GREY_25_PERCENT);
            
            // 生成名为"学生"的工作表，参数0表示这是第一页
            WritableSheet sheet = book.createSheet("学生基本信息表", 0);
            // 读取学生的数据信息
            List<Student> studentList = dao.getAll();
            Label head1 = new Label(0, 0, "编号");
            head1.setCellFormat(wcf);
            sheet.addCell(head1);
            Label head2 = new Label(1, 0, "姓名");
            head1.setCellFormat(wcf);
            sheet.addCell(head2);
            Label head3 = new Label(2, 0, "年龄");
            head1.setCellFormat(wcf);
            sheet.addCell(head3);
            
            if(studentList != null && !studentList.isEmpty()){
            	for (int i = 0; i < studentList.size(); i++) {
					sheet.addCell(new Label(0, i+1, String.valueOf(studentList.get(i).getId())));
					sheet.addCell(new Label(1, i+1, studentList.get(i).getUserName()));
					sheet.addCell(new Label(2, i+1, String.valueOf(studentList.get(i).getAge())));
				}
            }
            // 写入数据并关闭文件
            book.write();
		} catch (Exception e) {
			e.printStackTrace();
		} finally {
			if(book!=null){
                try {
                    book.close();
                } catch (Exception e) {
                    e.printStackTrace();
                } 
			}
		}
 	}
}

 4、web.xml

   <!-- 导出数据：配置export.do -->
  <servlet>
  	<servlet-name>exportServlet</servlet-name>
  	<servlet-class>com.servlet.ExportServlet</servlet-class>
  </servlet>
  <servlet-mapping>
  	<servlet-name>exportServlet</servlet-name>
	<url-pattern>/export.do</url-pattern>
  </servlet-mapping>

 5、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>Insert title here</title>
</head>
<body>
 <a href="export.do">导出EXCEL</a>
</body>
</html>