java_I/O操作_CreateEXcelFile

Posted 2020-12-28 -chang

1. //主函数
2. public class MainDemo {
3. public static void main(String[] args) throws Exception {
4. ExcelDocument excelDoc = new ExcelDocument();
5. excelDoc.createExcelFile07();
6. }
7. }

 

 

1. //封装Students类
2. import java.util.Date;
3. import javax.xml.crypto.Data;
4. public class Students {
5. private String code;
6. private String name;
7. private Integer age;
8. private Date birth;
9. public Students(String code,String name,Integer age,Date birth) {
10. this.code = code;
11. this.name = name;
12. this.age = age;
13. this.birth = birth;
14. }
15. public String getCode() {
16. return code;
17. }
18. protected void setCode(String code) {
19. this.code = code;
20. }
21. public String getName() {
22. return name;
23. }
24. protected void setName(String name) {
25. this.name = name;
26. }
27. public Integer getAge() {
28. return age;
29. }
30. protected void setAge(Integer age) {
31. this.age = age;
32. }
33. public Date getBirth() {
34. return birth;
35. }
36. protected void setBirth(Date birth) {
37. this.birth = birth;
38. }
39. }

 

1. //创建Students类实例并输出到Excel中
2. import java.io.File;
3. import java.io.FileNotFoundException;
4. import java.io.FileOutputStream;
5. import java.io.IOException;
6. import java.text.SimpleDateFormat;
7. import java.util.ArrayList;
8. import java.util.List;
9. import javax.jws.soap.SOAPBinding.Style;
10. import org.apache.poi.hssf.usermodel.HSSFCell;
11. import org.apache.poi.hssf.usermodel.HSSFSheet;
12. import org.apache.poi.hssf.usermodel.HSSFWorkbook;
13. import org.apache.poi.ss.usermodel.Cell;
14. import org.apache.poi.ss.usermodel.CellStyle;
15. import org.apache.poi.ss.usermodel.Row;
16. import org.apache.poi.ss.usermodel.Sheet;
17. import org.apache.poi.ss.usermodel.Workbook;
18. import org.apache.poi.xssf.usermodel.XSSFCell;
19. import org.apache.poi.xssf.usermodel.XSSFCellStyle;
20. import org.apache.poi.xssf.usermodel.XSSFRow;
21. import org.apache.poi.xssf.usermodel.XSSFSheet;
22. import org.apache.poi.xssf.usermodel.XSSFWorkbook;
23. public class ExcelDocument {
24. //新建1997版Excel文档
25. public static Workbook createExcelFile97() {
26. Workbook wb = new HSSFWorkbook();
27. return wb;
28. }
29. //新建2007版Excel文档
30. public static void createExcelFile07() throws Exception {
31. XSSFWorkbook wb = new XSSFWorkbook();
32. XSSFSheet sheet = wb.createSheet("学生表");//第二步：在workbook中添加一张sheet表
33. XSSFRow row = sheet.createRow((int)0); //第三步：在sheet表中添加一行作为表头
34. XSSFCellStyle style = (XSSFCellStyle)createStyle(wb);//第四步：设置样式
35. //第五步：创建cell表头
36. XSSFCell cell = row.createCell((short)0);
37. cell.setCellValue("学号");
38. cell.setCellStyle(style);
39. cell = row.createCell((short)1);
40. cell.setCellValue("姓名");
41. cell.setCellStyle(style);
42. cell = row.createCell((short)2);
43. cell.setCellValue("年龄");
44. cell.setCellStyle(style);
45. cell = row.createCell((short)3);
46. cell.setCellValue("生日");
47. cell.setCellStyle(style);
48. //第六步：写入实体数据
49. List list = getStudents();
50. for (int i = 0; i < list.size(); i++) {
51. row = sheet.createRow((int)i+1);
52. Students stu = (Students)list.get(i);
53. row.createCell((int)0).setCellValue(stu.getCode());
54. row.createCell((int)1).setCellValue(stu.getName());
55. row.createCell((int)2).setCellValue(stu.getAge());
56. row.createCell((int)3).setCellValue(stu.getBirth());
57. }
58. //第七步：将文件写入指定的位置
59. FileOutputStream outStream = getFileOutputStream();
60. wb.write(outStream);
61. outStream.close();
62. }
63. //将文件写入指定的位置
64. private static FileOutputStream getFileOutputStream() throws FileNotFoundException {
65. String path = "E:" + File.separatorChar + "Members.xls";
66. File file = new File(path);
67. if (!file.getParentFile().exists()) { //如果父级路径不存在就创建父级目录
68. file.getParentFile().mkdirs();
69. if (!file.exists()) { //如果文件不存在就创建文件
70. try {
71. file.createNewFile();
72. } catch (IOException e) {
73. e.printStackTrace();
74. }
75. }
76. }
77. FileOutputStream outputStream = new FileOutputStream(file);
78. return outputStream;
79. }
80. //创建cell的样式
81. private static CellStyle createStyle(Workbook wb) {
82. CellStyle style= wb.createCellStyle();
83. style.setAlignment(CellStyle.ALIGN_CENTER);//格式居中
84. return style;
85. }
86. //创建数组
87. private static List<Students> getStudents() throws Exception {
88. List list = new ArrayList();
89. SimpleDateFormat dateFormat = new SimpleDateFormat("yyyy-mm-dd");
90. Students student1 = new Students("1", "张三", (Integer)24, dateFormat.parse("1993-08-28"));
91. Students student2 = new Students("2", "李思", (Integer)23, dateFormat.parse("1994-03-07"));
92. list.add(student1);
93. list.add(student2);
94. return list;
95. }
96. }

POI.jar链接：https://pan.baidu.com/s/1KGcwHJHfWUwLQifOJS5XQg 密码：xvd2