Java 导出excel表 POI

 1 import java.util.Date;  
 2   
 3 public class Student  
 4 {  
 5     private int id;  
 6     private String name;  
 7     private int age;  
 8     private Date birth;  
 9   
10     public Student()  
11     {  
12     }  
13   
14     public Student(int id, String name, int age, Date birth)  
15     {  
16         this.id = id;  
17         this.name = name;  
18         this.age = age;  
19         this.birth = birth;  
20     }  
21   
22     public int getId()  
23     {  
24         return id;  
25     }  
26   
27     public void setId(int id)  
28     {  
29         this.id = id;  
30     }  
31   
32     public String getName()  
33     {  
34         return name;  
35     }  
36   
37     public void setName(String name)  
38     {  
39         this.name = name;  
40     }  
41   
42     public int getAge()  
43     {  
44         return age;  
45     }  
46   
47     public void setAge(int age)  
48     {  
49         this.age = age;  
50     }  
51   
52     public Date getBirth()  
53     {  
54         return birth;  
55     }  
56   
57     public void setBirth(Date birth)  
58     {  
59         this.birth = birth;  
60     }  
61   
62 }  

 1 import java.io.FileOutputStream;  
 2 import java.text.SimpleDateFormat;  
 3 import java.util.ArrayList;  
 4 import java.util.List;  
 5   
 6 import org.apache.poi.hssf.usermodel.HSSFCell;  
 7 import org.apache.poi.hssf.usermodel.HSSFCellStyle;  
 8 import org.apache.poi.hssf.usermodel.HSSFRow;  
 9 import org.apache.poi.hssf.usermodel.HSSFSheet;  
10 import org.apache.poi.hssf.usermodel.HSSFWorkbook;  
11   
12 public class CreateSimpleExcelToDisk  
13 {  
14     /** 
15      * @功能：手工构建一个简单格式的Excel 
16      */  
17     private static List<Student> getStudent() throws Exception  
18     {  
19         List list = new ArrayList();  
20         SimpleDateFormat df = new SimpleDateFormat("yyyy-mm-dd");  
21   
22         Student user1 = new Student(1, "张三", 16, df.parse("1997-03-12"));  
23         Student user2 = new Student(2, "李四", 17, df.parse("1996-08-12"));  
24         Student user3 = new Student(3, "王五", 26, df.parse("1985-11-12"));  
25         list.add(user1);  
26         list.add(user2);  
27         list.add(user3);  
28   
29         return list;  
30     }  
31   
32     public static void main(String[] args) throws Exception  
33     {  
34         // 第一步，创建一个webbook，对应一个Excel文件  
35         HSSFWorkbook wb = new HSSFWorkbook();  
36         // 第二步，在webbook中添加一个sheet,对应Excel文件中的sheet  
37         HSSFSheet sheet = wb.createSheet("学生表一");  
38         // 第三步，在sheet中添加表头第0行,注意老版本poi对Excel的行数列数有限制short  
39         HSSFRow row = sheet.createRow((int) 0);  
40         // 第四步，创建单元格，并设置值表头 设置表头居中  
41         HSSFCellStyle style = wb.createCellStyle();  
42         style.setAlignment(HSSFCellStyle.ALIGN_CENTER); // 创建一个居中格式  
43   
44         HSSFCell cell = row.createCell((short) 0);  
45         cell.setCellValue("学号");  
46         cell.setCellStyle(style);  
47         cell = row.createCell((short) 1);  
48         cell.setCellValue("姓名");  
49         cell.setCellStyle(style);  
50         cell = row.createCell((short) 2);  
51         cell.setCellValue("年龄");  
52         cell.setCellStyle(style);  
53         cell = row.createCell((short) 3);  
54         cell.setCellValue("生日");  
55         cell.setCellStyle(style);  
56   
57         // 第五步，写入实体数据 实际应用中这些数据从数据库得到，  
58         List list = CreateSimpleExcelToDisk.getStudent();  
59   
60         for (int i = 0; i < list.size(); i++)  
61         {  
62             row = sheet.createRow((int) i + 1);  
63             Student stu = (Student) list.get(i);  
64             // 第四步，创建单元格，并设置值  
65             row.createCell((short) 0).setCellValue((double) stu.getId());  
66             row.createCell((short) 1).setCellValue(stu.getName());  
67             row.createCell((short) 2).setCellValue((double) stu.getAge());  
68             cell = row.createCell((short) 3);  
69             cell.setCellValue(new SimpleDateFormat("yyyy-mm-dd").format(stu  
70                     .getBirth()));  
71         }  
72         // 第六步，将文件存到指定位置  
73         try  
74         {  
75             FileOutputStream fout = new FileOutputStream("E:/students.xls");  
76             wb.write(fout);  
77             fout.close();  
78         }  
79         catch (Exception e)  
80         {  
81             e.printStackTrace();  
82         }  
83     }  
84 }