Java 實現導出excel表 POI

Java 實現導出excel表 POI

首先下載poi-3.6-20091214.jar，點擊下載

例子如下：

1,Student.java

import java.util.Date;  

public class Student  
{  
   private int id;  
   private String name;  
   private int age;  
   private Date birth;  

   public Student(){}  
   public Student(int id, String name, int age, Date birth)  
   {  
       this.id = id;  
       this.name = name;  
       this.age = age;  
       this.birth = birth;  
    }  
    public int getId()  
    {  
        return id;  
    }  

    public void setId(int id)  
    {  
        this.id = id;  
    }  

    public String getName()  
    {  
        return name;  
    }  

    public void setName(String name)  
    {  
        this.name = name;  
    }  
    public int getAge()  
    {  
        return age;  
    }  
    public void setAge(int age)  
    {  
        this.age = age;  
    }  

    public Date getBirth()  
    {  
       return birth;  
    }  

    public void setBirth(Date birth)  
    {  
        this.birth = birth;  
    }  
}  


2,CreateSimpleExcelToDisk.java

import java.io.FileOutputStream;  
import java.text.SimpleDateFormat;  
import java.util.ArrayList;  
import java.util.List;  

import org.apache.poi.hssf.usermodel.HSSFCell;  
import org.apache.poi.hssf.usermodel.HSSFCellStyle;  
import org.apache.poi.hssf.usermodel.HSSFRow;  
import org.apache.poi.hssf.usermodel.HSSFSheet;  
import org.apache.poi.hssf.usermodel.HSSFWorkbook;  

public class CreateSimpleExcelToDisk  
{  
    /** 
     * @功能：手工構建一個簡單格式的Excel 
     */  
    private static List<Student> getStudent() throws Exception  
    {  
        List list = new ArrayList();  
        SimpleDateFormat df = new SimpleDateFormat("yyyy-mm-dd");  

        Student user1 = new Student(1, "張三", 16, df.parse("1997-03-12"));  
        Student user2 = new Student(2, "李四", 17, df.parse("1996-08-12"));  
        Student user3 = new Student(3, "王五", 26, df.parse("1985-11-12"));  
        list.add(user1);  
        list.add(user2);  
        list.add(user3);  

        return list;  
    }  

    public static void main(String[] args) throws Exception  
    {  
        // 第一步，創建一個webbook，對應一個Excel文件  
        HSSFWorkbook wb = new HSSFWorkbook();  
        // 第二步，在webbook中添加一個sheet,對應Excel文件中的sheet  
        HSSFSheet sheet = wb.createSheet("學生表一");  
        // 第三步，在sheet中添加表頭第0行,注意老版本poi對Excel的行數列數有限制short  
        HSSFRow row = sheet.createRow((int) 0);  
        // 第四步，創建單元格，並設置值表頭 設置表頭居中  
        HSSFCellStyle style = wb.createCellStyle();  
        style.setAlignment(HSSFCellStyle.ALIGN_CENTER); // 創建一個居中格式  

        HSSFCell cell = row.createCell((short) 0);  
        cell.setCellValue("學號");  
        cell.setCellStyle(style);  
        cell = row.createCell((short) 1);  
        cell.setCellValue("姓名");  
        cell.setCellStyle(style);  
        cell = row.createCell((short) 2);  
        cell.setCellValue("年齡");  
        cell.setCellStyle(style);  
        cell = row.createCell((short) 3);  
        cell.setCellValue("生日");  
        cell.setCellStyle(style);  

        // 第五步，寫入實體數據 實際應用中這些數據從數據庫得到，  
        List list = CreateSimpleExcelToDisk.getStudent();  

        for (int i = 0; i < list.size(); i++)  
        {  
            row = sheet.createRow((int) i + 1);  
            Student stu = (Student) list.get(i);  
            // 第四步，創建單元格，並設置值  
            row.createCell((short) 0).setCellValue((double) stu.getId());  
            row.createCell((short) 1).setCellValue(stu.getName());  
            row.createCell((short) 2).setCellValue((double) stu.getAge());  
            cell = row.createCell((short) 3);  
            cell.setCellValue(new SimpleDateFormat("yyyy-mm-dd").format(stu  
                    .getBirth()));  
        }  
        // 第六步，將文件存到指定位置  
        try  
        {  
            FileOutputStream fout = new FileOutputStream("E:/students.xls");  
            wb.write(fout);  
            fout.close();  
        }  
        catch (Exception e)  
        {  
            e.printStackTrace();  
        }  
    }  
}