7.17

luodangjia

2024-08-09 fa672aad1a91b2a8481324339e063230d378039e

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package com.stylefeng.guns.modular.system.util;
 
 
import org.apache.poi.hssf.usermodel.*;
import org.apache.poi.ss.usermodel.CellType;
import org.apache.poi.ss.usermodel.HorizontalAlignment;
 
import javax.servlet.http.HttpServletResponse;
import java.net.URLEncoder;
 
public class ExcelUtil {
    public static HSSFWorkbook getHSSFWorkbook(String sheetName, String[] title, String[][] values, HSSFWorkbook wb) {
        // 第一步，创建一个webbook，对应一个Excel文件
        if (wb == null) {
            wb = new HSSFWorkbook();
        }
        // 第二步，在webbook中添加一个sheet,对应Excel文件中的sheet
        HSSFSheet sheet = wb.createSheet(sheetName);
        // 第三步，在sheet中添加表头第0行,注意老版本poi对Excel的行数列数有限制short
        HSSFRow row = sheet.createRow(0);
        // 第四步，创建单元格，并设置值表头 设置表头居中
        HSSFCellStyle style = wb.createCellStyle();
        // 创建一个居中格式
        style.setAlignment(HorizontalAlignment.forInt((short) 2));
        HSSFCell cell = null;
        // 创建标题
        for (int i = 0; i < title.length; i++) {
            cell = row.createCell(i);
            cell.setCellType(CellType.forInt(1));
            cell.setCellValue(title[i]);
            cell.setCellStyle(style);
        }
        if(values!=null){
            // 创建内容
            for (int i = 0; i < values.length; i++) {
                row = sheet.createRow(i + 1);
                for (int j = 0; j < values[i].length; j++) {
                    row.createCell(j).setCellValue(values[i][j]);
                }
            }
 
        }
        return wb;
    }
 
    public static void setResponseHeader(HttpServletResponse response, String fileName) {
        try {
            response.setHeader("Content-Disposition", "attachment;filename=" + URLEncoder.encode(fileName));
            response.setContentType("application/vnd.ms-excel;charset=UTF-8");
            response.addHeader("Pragma", "no-cache");
            response.addHeader("Cache-Control", "no-cache");
        } catch (Exception ex) {
            ex.printStackTrace();
        }
    }
 
}