Java 导出excel表 POI

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1.首先下载poi-3.6-20091214.jar，下载地址如下：

http://download.csdn.net/detail/evangel_z/3895051

1.建立一个实体类

 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 }

2.导出实excel表

 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 }

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