java统计报表，导出excle，自定义存储目录
做一个将查询出来的数据写入excel，并且点击导出按钮是，可以选择导出路径
**直接上完整代码
1.utils工具类，里面可以自己设置样式，详细看注释
import java.io.File;import java.io.FileOutputStream;import mons.io.FileUtils;import org.apache.poi.hssf.usermodel.*;import org.apache.poi.hssf.util.HSSFColor;import org.apache.poi.ss.util.CellRangeAddress;import org.springframework.http.HttpHeaders;import org.springframework.http.HttpStatus;import org.springframework.http.MediaType;import org.springframework.http.ResponseEntity;import javax.servlet.http.HttpServletRequest;import javax.servlet.http.HttpServletResponse;public class ExcelUtil {/*sheet Name表名, titleName标题名, file Name文件名,columnNumber列号, columnWidth列宽, columnName列名**/public static ResponseEntity<byte[]> ExportNoResponse(String sheetName, String titleName,String fileName, int columnNumber, int[] columnWidth,String[] columnName, String[][] dataList, HttpServletRequest request,HttpServletResponse response) throws Exception {if (columnNumber == columnWidth.length && columnWidth.length == columnName.length) {// 第一步，创建一个webbook，对应一个Excel文件HSSFWorkbook wb = new HSSFWorkbook();// 第二步，在webbook中添加一个sheet,对应Excel文件中的sheetHSSFSheet sheet = wb.createSheet(sheetName);// sheet.setDefaultColumnWidth(15); //统一设置列宽for (int i = 0; i < columnNumber; i++) {for (int j = 0; j <= i; j++) {if (i == j) {sheet.setColumnWidth(i, columnWidth[j] * 256); // 单独设置每列的宽}}}// 创建第0行 也就是标题HSSFRow row1 = sheet.createRow((int) 0);row1.setHeightInPoints(20);// 设备标题的高度// 第三步创建标题的单元格样式style2以及字体样式headerFont1HSSFCellStyle style2 = wb.createCellStyle();style2.setAlignment(HSSFCellStyle.ALIGN_CENTER);style2.setVerticalAlignment(HSSFCellStyle.VERTICAL_CENTER);style2.setFillForegroundColor(HSSFColor.LIGHT_TURQUOISE.index);style2.setFillPattern(HSSFCellStyle.SOLID_FOREGROUND);HSSFFont headerFont1 = (HSSFFont) wb.createFont(); // 创建字体样式headerFont1.setBoldweight(HSSFFont.BOLDWEIGHT_BOLD); // 字体加粗headerFont1.setFontName("黑体"); // 设置字体类型headerFont1.setFontHeightInPoints((short) 15); // 设置字体大小style2.setFont(headerFont1); // 为标题样式设置字体样式HSSFCell cell1 = row1.createCell(0);// 创建标题第一列sheet.addMergedRegion(new CellRangeAddress(0, 0, 0,columnNumber - 1)); // 合并第0到第17列cell1.setCellValue(titleName); // 设置值标题cell1.setCellStyle(style2); // 设置标题样式// 创建第1行 也就是表头HSSFRow row = sheet.createRow((int) 1);row.setHeightInPoints(37);// 设置表头高度// 第四步，创建表头单元格样式 以及表头的字体样式HSSFCellStyle style = wb.createCellStyle();style.setWrapText(true);// 设置自动换行style.setAlignment(HSSFCellStyle.ALIGN_CENTER);style.setVerticalAlignment(HSSFCellStyle.VERTICAL_CENTER); // 创建一个居中格式style.setBottomBorderColor(HSSFColor.BLACK.index);style.setBorderBottom(HSSFCellStyle.BORDER_THIN);style.setBorderLeft(HSSFCellStyle.BORDER_THIN);style.setBorderRight(HSSFCellStyle.BORDER_THIN);style.setBorderTop(HSSFCellStyle.BORDER_THIN);HSSFFont headerFont = (HSSFFont) wb.createFont(); // 创建字体样式headerFont.setBoldweight(HSSFFont.BOLDWEIGHT_BOLD); // 字体加粗headerFont.setFontName("黑体"); // 设置字体类型headerFont.setFontHeightInPoints((short) 10); // 设置字体大小style.setFont(headerFont); // 为标题样式设置字体样式// 第四.一步，创建表头的列for (int i = 0; i < columnNumber; i++) {HSSFCell cell = row.createCell(i);cell.setCellValue(columnName[i]);cell.setCellStyle(style);}String code = createID2();// 第五步，创建单元格，并设置值for (int i = 0; i < dataList.length; i++) {row = sheet.createRow((int) i + 2);// 为数据内容设置特点新单元格样式1 自动换行 上下居中HSSFCellStyle zidonghuanhang = wb.createCellStyle();zidonghuanhang.setWrapText(true);// 设置自动换行zidonghuanhang.setVerticalAlignment(HSSFCellStyle.VERTICAL_CENTER); // 创建一个居中格式// 设置边框zidonghuanhang.setBottomBorderColor(HSSFColor.BLACK.index);zidonghuanhang.setBorderBottom(HSSFCellStyle.BORDER_THIN);zidonghuanhang.setBorderLeft(HSSFCellStyle.BORDER_THIN);zidonghuanhang.setBorderRight(HSSFCellStyle.BORDER_THIN);zidonghuanhang.setBorderTop(HSSFCellStyle.BORDER_THIN);// 为数据内容设置特点新单元格样式2 自动换行 上下居中左右也居中HSSFCellStyle zidonghuanhang2 = wb.createCellStyle();zidonghuanhang2.setWrapText(true);// 设置自动换行zidonghuanhang2.setVerticalAlignment(HSSFCellStyle.VERTICAL_CENTER); // 创建一个上下居中格式zidonghuanhang2.setAlignment(HSSFCellStyle.ALIGN_CENTER);// 左右居中// 设置边框zidonghuanhang2.setBottomBorderColor(HSSFColor.BLACK.index);zidonghuanhang2.setBorderBottom(HSSFCellStyle.BORDER_THIN);zidonghuanhang2.setBorderLeft(HSSFCellStyle.BORDER_THIN);zidonghuanhang2.setBorderRight(HSSFCellStyle.BORDER_THIN);zidonghuanhang2.setBorderTop(HSSFCellStyle.BORDER_THIN);HSSFCell datacell = null;for (int j = 0; j < columnNumber; j++) {datacell = row.createCell(j);datacell.setCellValue(dataList[i][j]);datacell.setCellStyle(zidonghuanhang2);}}// 第六步，将文件存到指定位置try {String path = request.getServletContext().getRealPath("/upload/" + "测试报表" +code+ ".xls");File file = new File(path);if(!file.exists()){//先得到文件的上级目录，并创建上级目录，在创建文件file.getParentFile().mkdir();try {//创建文件file.createNewFile();} catch (IOException e) {e.printStackTrace();}}FileOutputStream fout = new FileOutputStream(file);// new FileOutputStream("\\upload\\" + "测试报表" +code+ ".xls");wb.write(fout);fout.close();String fileName1 = "测试报表" +code+ ".xls";//fileName1 = fileName1.substring(1, fileName1.length());String dfileName = new String(fileName1.getBytes("gb2312"), "iso8859-1");HttpHeaders headers = new HttpHeaders();headers.setContentType(MediaType.APPLICATION_OCTET_STREAM);headers.setContentDispositionFormData("attachment", dfileName);String str = "导出" + "测试报表" + "成功！";System.out.println(str);//HttpStatus.OK兼容iereturn new ResponseEntity<byte[]>(FileUtils.readFileToByteArray(file),headers, HttpStatus.OK);//fout.close();} catch (Exception e) {e.printStackTrace();String str1 = "导出" + "测试报表" + "失败！";System.out.println(str1);}} else {System.out.println("失败，Game over");}return null;}public static String createID2(){//将Date类型转成String类型Date now=new Date();SimpleDateFormat dateFormat = new SimpleDateFormat("yyyyMMddHHmmss");String dateStr=dateFormat.format(now);byte[] lock = new byte[0];// 位数，默认是8位final long w = 100000000;long r = 0;synchronized (lock) {r = (long) ((Math.random() + 1) * w);}return dateStr+String.valueOf(r).substring(1);}}
3.请求方法
@RequestMapping(value = "/toFile")public ResponseEntity<byte[]> uploadFile(HttpServletRequest request,HttpServletResponse response) throws Exception {List<IsOrRe> list = isOrReService.slectByParam();String sheetName = "测试统计表单";String titleName = "清城测试订单报表";String fileName = "测试报表XXX";//columnWidth columnName 长度等于columnNumberint columnNumber = 8;int[] columnWidth = {6, 12,10, 15, 15, 12, 10,, 15};String[] columnName = {"序号", "XX公司", "产品名称", "方案XX", "订单号", "XX号", "XX1", "XX2"};//将List转换为二维数组String[][]String[][] ss = new String[list.size()][columnNumber];for (int i = 0; i < list.size(); i++) {ss[i] = new String[]{String.valueOf(i+1),list.get(i).getInCony(),list.get(i).getPrName(), list.get(i).getPlName(),list.get(i).getOrNo(), list.get(i).getPoNo(),list.get(i).getAppName(),list.get(i).getAppMobile() };}ResponseEntity<byte[]> res = ExportNoResponse(sheetName, titleName, fileName,columnNumber, columnWidth, columnName, ss, request, response);return res;}
浏览器点击导出按钮导出效果：这就可以选择导出路径了
xls内容样式
