1.先導入相關jar包

2.Student.java

1. import java.util.Date;
3. public class Student
4. {
5. private int id;
6. private String name;
7. private int age;
8. private Date birth;
10. public Student()
11. {
12. }
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. }
22. public int getId()
23. {
24. return id;
25. }
27. public void setId(int id)
28. {
29. this.id = id;
30. }
32. public String getName()
33. {
34. return name;
35. }
37. public void setName(String name)
38. {
39. this.name = name;
40. }
42. public int getAge()
43. {
44. return age;
45. }
47. public void setAge(int age)
48. {
49. this.age = age;
50. }
52. public Date getBirth()
53. {
54. return birth;
55. }
57. public void setBirth(Date birth)
58. {
59. this.birth = birth;
60. }
62. }

3.CreateSimpleExcelToDisk.java

1. import java.io.FileOutputStream;
2. import java.text.SimpleDateFormat;
3. import java.util.ArrayList;
4. import java.util.List;
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;
12. public class CreateSimpleExcelToDisk
13. {
14. /**
15. * @功能：手工構建一個簡單格式的Excel
16. */
17. private static List<Student> getStudent() throws Exception
18. {
19. List list = new ArrayList();
20. SimpleDateFormat df = new SimpleDateFormat("yyyy-mm-dd");
22. Student user1 = new Student(1, "張三", 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);
29. return list;
30. }
32. public static void main(String[] args) throws Exception
33. {
34. // 第一步，創建一個webbook，對應一個Excel文件
35. HSSFWorkbook wb = new HSSFWorkbook();
36. // 第二步，在webbook中添加一個sheet,對應Excel文件中的sheet
37. HSSFSheet sheet = wb.createSheet("學生表一");
38. // 第三步，在sheet中添加表頭第0行,註意老版本poi對Excel的行數列數有限制short
39. HSSFRow row = sheet.createRow((int) 0);
40. // 第四步，創建單元格，並設置值表頭 設置表頭居中
41. HSSFCellStyle style = wb.createCellStyle();
42. style.setAlignment(HSSFCellStyle.ALIGN_CENTER); // 創建一個居中格式
44. HSSFCell cell = row.createCell((short) 0);
45. cell.setCellValue("學號");
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("年齡");
52. cell.setCellStyle(style);
53. cell = row.createCell((short) 3);
54. cell.setCellValue("生日");
55. cell.setCellStyle(style);
57. // 第五步，寫入實體數據 實際應用中這些數據從數據庫得到，
58. List list = CreateSimpleExcelToDisk.getStudent();
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，創建單元格，並設置值
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，將文件存到指定位置
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. }

Java 實現導出excel表 POI