java poi操作excel 添加 锁定单元格保护

package com.util;

import java.io.FileOutputStream;

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

public class PoiCreateExcel {

    public static void main(String[] args) throws Exception {
        // 创建Excel的 Workbook,对应到一个excel文档
        HSSFWorkbook wb = new HSSFWorkbook();
        
        HSSFSheet sheet = wb.createSheet("sheet1");
        //sheet添加保护 代码
        sheet.protectSheet("123");

        // 创建Excel的sheet的一行
        HSSFRow row = sheet.createRow(0);
        // 创建 单元格
        HSSFCell cell = row.createCell(0);
        // 给Excel的单元格 赋值
        cell.setCellValue("hello world");

        FileOutputStream os = new FileOutputStream("g:\\workbook.xls");
        wb.write(os);
        os.close();
    }

}