java操作Excel的poi 创建一个sheet页

package com.java.poi;

import org.apache.poi.hssf.usermodel.HSSFWorkbook;
import org.apache.poi.ss.usermodel.Workbook;

import java.io.FileOutputStream;

/**
 * @author nidegui
 * @create 2019-06-17 9:42
 */
public class Test2 {
    /**
     * 创建一个sheet页
     * @param args
     * @throws Exception
     */
    public static void main(String[] args) throws Exception{
        Workbook wb=new HSSFWorkbook();
        wb.createSheet("第一个sheet页");
        FileOutputStream fileOutputStream=new FileOutputStream("E:\\1.xls");
        wb.write(fileOutputStream);
        fileOutputStream.close();
    }
}

package com.java.poi;

import org.apache.poi.hssf.usermodel.HSSFWorkbook;
import org.apache.poi.ss.usermodel.Cell;
import org.apache.poi.ss.usermodel.Row;
import org.apache.poi.ss.usermodel.Sheet;
import org.apache.poi.ss.usermodel.Workbook;

import java.io.FileOutputStream;

/**
 * @author nidegui
 * @create 2019-06-17 9:46
 */
public class Test3 {
    public static void main(String[] args) throws Exception {
        Workbook wb=new HSSFWorkbook();
        Sheet sheet = wb.createSheet("创建sheet页");
        Row row = sheet.createRow(0);//创建行
        Cell cell = row.createCell(0);//创建一个单元格， 第一列
        cell.setCellValue(1);  //给单元格设置值

        row.createCell(1).setCellValue(1.2); //创建一个单元格，第三列，值为1.2
        row.createCell(2).setCellValue("这是一个字符串");
        row.createCell(3).setCellValue(false); //4列 创建一个Boolean类型

        FileOutputStream fileOutputStream=new FileOutputStream("E:\\3.xls");
        wb.write(fileOutputStream);
        fileOutputStream.close();
    }
}