web开发中,一个系统的普通需求也包括导出excel,一般采用POI做统计报表导出excel。
导出excel工具类:
import java.io.FileOutputStream; import java.io.IOException; import java.io.OutputStream; import java.util.List; import java.util.Map; import org.apache.poi.hssf.usermodel.HSSFCell; import org.apache.poi.hssf.usermodel.HSSFRichTextString; import org.apache.poi.hssf.usermodel.HSSFRow; import org.apache.poi.hssf.usermodel.HSSFSheet; import org.apache.poi.hssf.usermodel.HSSFWorkbook; public class ExportExcel { private ExportExcel() { super(); } public static void exportExcel(List<Object> list, Map<Integer, Long> map, String[] titles) throws IOException { // 创建Excel文档 HSSFWorkbook hwb = new HSSFWorkbook(); // sheet 对应一个工作页 HSSFSheet sheet = hwb.createSheet("exportReport"); int colNum = titles.length; // 创建第一行 HSSFRow firstrow = sheet.createRow(0); HSSFCell[] firstcell = new HSSFCell[colNum]; for (int col = 0; col < colNum; col++) { firstcell[col] = firstrow.createCell(col); firstcell[col].setCellValue(new HSSFRichTextString(titles[col])); } // 插入记录 int rowNum = map.size(); for (int i = 0; i < rowNum; i++) { // 从第二行开始 HSSFRow row = sheet.createRow(i + 1); // 插入list中的字段 for (int col = 0; col < colNum - 2; col++) { HSSFCell cell = row.createCell(col); cell.setCellValue(list.get(col).toString()); } // 插入月份或日期 row.createCell(colNum - 2).setCellValue(i + 1); // 插入总量 row.createCell(colNum - 1).setCellValue(map.get(i + 1)); } String fileName = titles[1].substring(0, 2); if (colNum == 4) { fileName += list.get(0) + "_" + list.get(1) + "年_年度报表"; } else if (colNum == 5) { fileName += list.get(0) + "_" + list.get(1) + "年" + list.get(2) + "月_月度报表"; } // 创建文件输出流,准备输出电子表格 OutputStream out = new FileOutputStream("../webapps/UsedMallMinaServer/files/" + fileName + ".xls"); hwb.write(out); out.close(); } }
web开发之导出excel工具类,布布扣,bubuko.com
原文地址:http://blog.csdn.net/y_chengyong/article/details/37521397