1.首先下載poi-3.6-20091214.jar,下載地址以下:java
http://download.csdn.net/detail/evangel_z/3895051web
2.Student.java數據庫
import java.util.Date;apache
public class Student
{
private int id;
private String name;
private int age;
private Date birth;this
public Student()
{
}.net
public Student(int id, String name, int age, Date birth)
{
this.id = id;
this.name = name;
this.age = age;
this.birth = birth;
}orm
public int getId()
{
return id;
}get
public void setId(int id)
{
this.id = id;
}it
public String getName()
{
return name;
}io
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;
}
}
3.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,建立一個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,建立單元格,並設置值表頭 設置表頭居中
HSSFCellStyle style = wb.createCellStyle();
style.setAlignment(HSSFCellStyle.ALIGN_CENTER); // 建立一個居中格式
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獲得,
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,建立單元格,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(); } } }