Java實現匯出Excel表例子
阿新 • • 發佈：2019-01-05
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檔案
HSSFWorkbook wb = new HSSFWorkbook();
// 第二步，在webbook中新增一個sheet,對應Excel檔案中的sheet
HSSFSheet sheet = wb.createSheet("學生表一");
// 第三步，在sheet中新增表頭第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，並設定值表頭 設定表頭居中
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，寫入實體資料 實際應用中這些資料從資料庫得到，
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，建立單元格，並設定值
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，將檔案存到指定位置
try
{
FileOutputStream fout = new FileOutputStream("E:/students.xls");
wb.write(fout);
fout.close();
}
catch (Exception e)
{
e.printStackTrace();
}
}
}
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檔案
HSSFWorkbook wb = new HSSFWorkbook();
// 第二步，在webbook中新增一個sheet,對應Excel檔案中的sheet
HSSFSheet sheet = wb.createSheet("學生表一");
// 第三步，在sheet中新增表頭第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，並設定值表頭 設定表頭居中
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，寫入實體資料 實際應用中這些資料從資料庫得到，
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，建立單元格，並設定值
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，將檔案存到指定位置
try
{
FileOutputStream fout = new FileOutputStream("E:/students.xls");
wb.write(fout);
fout.close();
}
catch (Exception e)
{
e.printStackTrace();
}
}
}