简单的poi导出excel文件

/**
*
* 创建excel文件
*
*/
 1 import java.io.FileOutputStream;
import java.io.IOException;
import java.util.Calendar;
import java.util.List;

import org.apache.poi.hssf.usermodel.HSSFCell;
import org.apache.poi.hssf.usermodel.HSSFRow;
import org.apache.poi.hssf.usermodel.HSSFSheet;
import org.apache.poi.hssf.usermodel.HSSFWorkbook;

public class PoiTest {

    public static void main(String[] args) throws IOException {
        
    
        
        //创建一个webbook，对应一个excel文件
        HSSFWorkbook wb = new HSSFWorkbook();
        //在webbook中添加一个sheet。对应excel文件中的sheet
        HSSFSheet sheet = wb.createSheet();
        //在sheet中添加表头第0行
        HSSFRow row = sheet.createRow(0);
        
        HSSFCell cell = row.createCell(0);
        cell.setCellValue("aaaaaa");
        cell = row.createCell(1);
        cell.setCellValue("bbbbbb");
        cell = row.createCell(2);
        cell.setCellValue("cccccc");
        //接收utils.userResult方法的返回值
        List recetion = new Utils().userResult();
        
        for (int i = 1; i < recetion.size()+1; i++) {
            
            row = sheet.createRow(i);
            
        }
        
        System.out.println(row.getRowNum());
        
        for (int i = 0; i < recetion.size(); i++) {
            row = sheet.getRow(i + 1);
            System.out.println(row.getRowNum());
            User user = (User)recetion.get(i);
            //创建单元格
            row.createCell(0).setCellValue(user.getName());
            row.createCell(1).setCellValue(user.getAge());
            row.createCell(2).setCellValue(user.getOther());

            
        }
        
        //保存文件
        FileOutputStream fOut = new FileOutputStream("d:\" + Calendar.getInstance().getTimeInMillis() + ".xls",false);
        wb.write(fOut);
        fOut.flush();
        fOut.close();
    }
}

/**
* javabean
*/
public class User {

    private String name;
    public String getName() {
        return name;
    }
    public void setName(String name) {
        this.name = name;
    }
    public String getAge() {
        return age;
    }
    public void setAge(String age) {
        this.age = age;
    }
    public String getOther() {
        return other;
    }
    public void setOther(String other) {
        this.other = other;
    }
    private String age;
    private String other;
    
    
}

/**
* 模拟数据库查询结果
*/
import java.util.ArrayList;
import java.util.List;

public class Utils {

    @SuppressWarnings("rawtypes")
    public List userResult() {
        User user = new User();
        user.setName("张1");
        user.setAge("12");
        user.setOther("aaaa");
        User user1 = new User();
        user1.setName("张2");
        user1.setAge("12");
        user1.setOther("a");
        User user2 = new User();
        user2.setName("张3");
        user2.setAge("12");
        user2.setOther("ccc");
        User user3 = new User();
        user3.setName("张4");
        user3.setAge("12");
        user3.setOther("bbb");
        
        List<User> list = new ArrayList<User>();
        list.add(user);
        list.add(user1);
        list.add(user2);
        list.add(user3);
        return list;
    }
}

poi jar包下载地址：http://download.csdn.net/download/pumpkin09/7077011