简单的poi导出excel文件

 1 import java.io.FileOutputStream;
 2 import java.io.IOException;
 3 import java.util.Calendar;
 4 import java.util.List;
 5 
 6 import org.apache.poi.hssf.usermodel.HSSFCell;
 7 import org.apache.poi.hssf.usermodel.HSSFRow;
 8 import org.apache.poi.hssf.usermodel.HSSFSheet;
 9 import org.apache.poi.hssf.usermodel.HSSFWorkbook;
10 
11 public class PoiTest {
12 
13     public static void main(String[] args) throws IOException {
14         
15     
16         
17         //创建一个webbook，对应一个excel文件
18         HSSFWorkbook wb = new HSSFWorkbook();
19         //在webbook中添加一个sheet。对应excel文件中的sheet
20         HSSFSheet sheet = wb.createSheet();
21         //在sheet中添加表头第0行
22         HSSFRow row = sheet.createRow(0);
23         
24         HSSFCell cell = row.createCell(0);
25         cell.setCellValue("aaaaaa");
26         cell = row.createCell(1);
27         cell.setCellValue("bbbbbb");
28         cell = row.createCell(2);
29         cell.setCellValue("cccccc");
30         //接收utils.userResult方法的返回值
31         List recetion = new Utils().userResult();
32         
33         for (int i = 1; i < recetion.size()+1; i++) {
34             
35             row = sheet.createRow(i);
36             
37         }
38         
39         System.out.println(row.getRowNum());
40         
41         for (int i = 0; i < recetion.size(); i++) {
42             row = sheet.getRow(i + 1);
43             System.out.println(row.getRowNum());
44             User user = (User)recetion.get(i);
45             //创建单元格
46             row.createCell(0).setCellValue(user.getName());
47             row.createCell(1).setCellValue(user.getAge());
48             row.createCell(2).setCellValue(user.getOther());
49 
50             
51         }
52         
53         //保存文件
54         FileOutputStream fOut = new FileOutputStream("d:\\" + Calendar.getInstance().getTimeInMillis() + ".xls",false);
55         wb.write(fOut);
56         fOut.flush();
57         fOut.close();
58     }
59 }

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;
    
    
}

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;
    }
}