POI 设置Excel样式

/*

• Copyright 2002-2019 Petro-CyberWorks Information Technology Co. Ltd. All rights reserved.
• PCITC PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.

*/

package com.pcitc.scl.business.productoil.util.excel;

import java.io.BufferedInputStream;
import java.io.BufferedOutputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.InputStream;
import java.io.OutputStream;
import java.net.URLEncoder;
import java.nio.charset.StandardCharsets;
import java.util.Iterator;

import org.apache.poi.ss.usermodel.BorderStyle;
import org.apache.poi.ss.usermodel.Cell;
import org.apache.poi.ss.usermodel.Font;
import org.apache.poi.ss.usermodel.HorizontalAlignment;
import org.apache.poi.ss.usermodel.VerticalAlignment;
import org.apache.poi.xssf.usermodel.XSSFCell;
import org.apache.poi.xssf.usermodel.XSSFCellStyle;
import org.apache.poi.xssf.usermodel.XSSFFont;
import org.apache.poi.xssf.usermodel.XSSFRow;
import org.apache.poi.xssf.usermodel.XSSFSheet;
import org.apache.poi.xssf.usermodel.XSSFWorkbook;
import org.springframework.http.MediaType;

/**

• @description

• @author sufangfang

• @version 1.0, 2019年2月22日
  */
  public class Test {

  public static void main(String[] args) {
  File newFile = ExcelUtil.createNewFile(“经营管理-销售管理-出口销售.xlsx”);

   // 新文件写入数据，并下载*****************************************************
   InputStream is = null;
   XSSFWorkbook workbook = null;
   XSSFSheet sheet = null;
   try {
       is = new FileInputStream(newFile);// 将excel文件转为输入流
       workbook = new XSSFWorkbook(is);// 创建个workbook，
       // 获取第一个sheet
       sheet = workbook.getSheetAt(0);
   } catch (Exception e1) {
       e1.printStackTrace();
   }
  
   if (sheet != null) {
       try {
           // 写数据
           FileOutputStream fos = new FileOutputStream(newFile);
           XSSFRow row = sheet.getRow(0);
           if (row == null) {
               row = sheet.createRow(0);
           } else {
               Iterator it = row.cellIterator();
               while (it.hasNext()) {
                   Cell cell = it.next();
                   cell.setCellStyle(buildHeaderStyle(workbook));
               }
           }
           XSSFCell cell = row.getCell(0);
           if (cell == null) {
               cell = row.createCell(0);
           }
           workbook.write(fos);
           fos.flush();
           fos.close();
       } catch (Exception e) {
           e.printStackTrace();
       } finally {
           try {
               if (null != is) {
                   is.close();
               }
           } catch (Exception e) {
               e.printStackTrace();
           }
       }
   }
  

  }

  public static XSSFCellStyle buildHeaderStyle(XSSFWorkbook workbook) {
  XSSFCellStyle style = workbook.createCellStyle();
  style.setAlignment(HorizontalAlignment.CENTER); //横向居中
  style.setVerticalAlignment(VerticalAlignment.CENTER); //竖向居中
  //设置边框
  style.setBorderBottom(BorderStyle.THIN);
  style.setBorderLeft(BorderStyle.THIN);
  style.setBorderRight(BorderStyle.THIN);
  style.setBorderTop(BorderStyle.THIN);
  //字体样式
  XSSFFont font = workbook.createFont();
  font.setBold(true); //加粗
  font.setColor(Font.COLOR_NORMAL);//黑色
  font.setFontName(“黑体”);
  font.setFontHeight(12); //字体大小
  style.setFont(font);
  return style;
  }

}