poi设置Excel单元格边框 和 背景色，java设置Excel 单元格边框 和 背景色

import org.apache.poi.hssf.usermodel.HSSFWorkbook;
import org.apache.poi.hssf.util.HSSFColor;
import org.apache.poi.ss.usermodel.BorderStyle;
import org.apache.poi.ss.usermodel.Cell;
import org.apache.poi.ss.usermodel.CellStyle;
import org.apache.poi.ss.usermodel.FillPatternType;
import org.apache.poi.ss.usermodel.IndexedColors;
import org.apache.poi.ss.usermodel.Row;
import org.apache.poi.ss.usermodel.Sheet;
import org.apache.poi.ss.usermodel.Workbook;

import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.OutputStream;

/**
 * @ClassName 类名：ExcelDemo5
 * @Author作者: hzh
 * @Date时间：2018/12/4 13:41
 * 单元格边框 和 背景色
 **/
public class ExcelDemo5 {

    public static void main(String[] args) throws Exception {
        Workbook wb = new HSSFWorkbook();
        Sheet sheet = wb.createSheet("一个sheet");
        Row row = sheet.createRow(3); //第一行
        Cell cell = row.createCell(3); //第一列
        cell.setCellValue("哈哈");

        CellStyle cellStyle = wb.createCellStyle(); //创建一个样式
        cellStyle.setBorderBottom(BorderStyle.DOUBLE); //底部边框
        cellStyle.setBottomBorderColor(HSSFColor.YELLOW.index);//底部边框颜色

        cellStyle.setBorderLeft(BorderStyle.MEDIUM_DASH_DOT_DOT); //左边框
        cellStyle.setLeftBorderColor(HSSFColor.RED.index);//左边框颜色

        cellStyle.setFillForegroundColor(IndexedColors.RED.getIndex()); //设置背景色
        cellStyle.setFillPattern(FillPatternType.SOLID_FOREGROUND);

        cell.setCellStyle(cellStyle);
        FileOutputStream fileOutputStream = new FileOutputStream("D://file//工作薄2.xls");
        wb.write(fileOutputStream);
        wb.close();
    }

}