一、Java工具类代码:
java
package com.allin.util; import java.io.File; import java.io.FileInputStream; import java.io.FileOutputStream; import java.io.IOException; import java.io.OutputStream; import java.lang.reflect.Method; import java.text.SimpleDateFormat; import java.util.ArrayList; import java.util.Collection; import java.util.Date; import java.util.List; import java.util.regex.Matcher; import java.util.regex.Pattern; import java.util.zip.ZipEntry; import java.util.zip.ZipOutputStream; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import org.apache.poi.hssf.usermodel.HSSFCell; import org.apache.poi.hssf.usermodel.HSSFCellStyle; import org.apache.poi.hssf.usermodel.HSSFClientAnchor; import org.apache.poi.hssf.usermodel.HSSFFont; import org.apache.poi.hssf.usermodel.HSSFPatriarch; 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; import org.apache.poi.hssf.util.HSSFColor; import org.apache.poi.hssf.util.Region; import org.apache.poi.ss.usermodel.Workbook; import org.compass.core.util.CollectionUtils; /** * 2015-4-29 * DES:POI导出Excel * author:JiBaoLe */ public class ExportToExcelUtil<T> { //每次设置导出数量 public static int NUM=5000; public static String title=""; /** * 导出Excel的方法 * @param title excel中的sheet名称 * @param headers 表头 * @param result 结果集 * @param out 输出流 * @param pattern 时间格式 * @throws Exception */ public void exportExcel( String[] headers,String[] columns, List<T> result, OutputStream out,HttpServletRequest request, String pattern) throws Exception{ File zip = new File(request.getRealPath("/files") + "/" +getFileName() + ".zip");// 压缩文件 int n=0; if (!CollectionUtils.isEmpty(result)) { if (result.size() % NUM == 0) { n = result.size() / NUM; } else { n = result.size() / NUM + 1; } }else{ n=1; } List<String> fileNames = new ArrayList();// 用于存放生成的文件名称s //文件流用于转存文件 for (int j = 0; j < n; j++) { Collection<T> result1=null; //切取每5000为一个导出单位,存储一个文件 //对不足5000作处理; if (!CollectionUtils.isEmpty(result)) { if (j == n - 1) { if (result.size() % NUM == 0) { result1 = result.subList(5000 * j, 5000 * (j + 1)); } else { result1 = result.subList(5000 * j, 5000 * j + result.size() % NUM); } } else { result1 = result.subList(5000 * j, 5000 * (j + 1)); } } // 声明一个工做薄 Workbook workbook = new HSSFWorkbook(); // 生成一个表格 HSSFSheet sheet = (HSSFSheet) workbook.createSheet(title); // 设置表格默认列宽度为18个字节 sheet.setDefaultColumnWidth((short)18); String file = request.getRealPath("/files") + "/" + getFileName() + "-" +j+ ".xls"; fileNames.add(file); FileOutputStream o = new FileOutputStream(file); // 生成一个样式 HSSFCellStyle style = (HSSFCellStyle) workbook.createCellStyle(); // 设置这些样式 style.setFillForegroundColor(HSSFColor.GOLD.index); style.setFillPattern(HSSFCellStyle.SOLID_FOREGROUND); style.setBorderBottom(HSSFCellStyle.BORDER_THIN); style.setBorderLeft(HSSFCellStyle.BORDER_THIN); style.setBorderRight(HSSFCellStyle.BORDER_THIN); style.setBorderTop(HSSFCellStyle.BORDER_THIN); style.setAlignment(HSSFCellStyle.ALIGN_CENTER); // 生成一个字体 HSSFFont font = (HSSFFont) workbook.createFont(); font.setColor(HSSFColor.VIOLET.index); //font.setFontHeightInPoints((short) 12); font.setBoldweight(HSSFFont.BOLDWEIGHT_BOLD); // 把字体应用到当前的样式 style.setFont(font); // 指定当单元格内容显示不下时自动换行 style.setWrapText(true); // 声明一个画图的顶级管理器 HSSFPatriarch patriarch = sheet.createDrawingPatriarch(); // 产生表格标题行 //表头的样式 HSSFCellStyle titleStyle = (HSSFCellStyle) workbook.createCellStyle();// 建立样式对象 titleStyle.setAlignment(HSSFCellStyle.ALIGN_CENTER_SELECTION);// 水平居中 titleStyle.setVerticalAlignment(HSSFCellStyle.VERTICAL_CENTER);// 垂直居中 // 设置字体 HSSFFont titleFont = (HSSFFont) workbook.createFont(); // 建立字体对象 titleFont.setFontHeightInPoints((short) 15); // 设置字体大小 titleFont.setBoldweight(HSSFFont.BOLDWEIGHT_BOLD);// 设置粗体 // titleFont.setFontName("黑体"); // 设置为黑体字 titleStyle.setFont(titleFont); sheet.addMergedRegion(new Region(0,(short)0,0,(short)(headers.length-1)));//指定合并区域 HSSFRow rowHeader = sheet.createRow(0); HSSFCell cellHeader = rowHeader.createCell((short)0); //只能往第一格子写数据,而后应用样式,就能够水平垂直居中 HSSFRichTextString textHeader = new HSSFRichTextString(title); cellHeader.setCellStyle(titleStyle); cellHeader.setCellValue(textHeader); HSSFRow row = sheet.createRow(1); for (int i = 0; i < headers.length; i++) { HSSFCell cell = row.createCell((short)i); cell.setCellStyle(style); HSSFRichTextString text = new HSSFRichTextString(headers[i]); cell.setCellValue(text); } // 遍历集合数据,产生数据行 if(result1 != null){ int index = 2; for(T t:result1){ row = sheet.createRow(index); index++; for(short i = 0; i < columns.length; i++) { HSSFCell cell = row.createCell(i); String fieldName = columns[i]; String getMethodName = "get" + fieldName.substring(0, 1).toUpperCase() + fieldName.substring(1); Class tCls = t.getClass(); Method getMethod = tCls.getMethod(getMethodName, new Class[]{}); Object value = getMethod.invoke(t, new Class[]{}); String textValue = null; if(value == null) { textValue = ""; }else if (value instanceof Date) { Date date = (Date) value; SimpleDateFormat sdf = new SimpleDateFormat(pattern); textValue = sdf.format(date); } else if (value instanceof byte[]) { // 有图片时,设置行高为60px; row.setHeightInPoints(60); // 设置图片所在列宽度为80px,注意这里单位的一个换算 sheet.setColumnWidth(i, (short) (35.7 * 80)); byte[] bsValue = (byte[]) value; HSSFClientAnchor anchor = new HSSFClientAnchor(0, 0, 1023, 255, (short) 6, index, (short) 6, index); anchor.setAnchorType(2); patriarch.createPicture(anchor, workbook.addPicture( bsValue, HSSFWorkbook.PICTURE_TYPE_JPEG)); } else{ //其它数据类型都看成字符串简单处理 textValue = value.toString(); } if(textValue!= null){ Pattern p = Pattern.compile("^//d+(//.//d+)?$"); Matcher matcher = p.matcher(textValue); if(matcher.matches()){ //是数字看成double处理 cell.setCellValue(Double.parseDouble(textValue)); }else{ HSSFRichTextString richString = new HSSFRichTextString(textValue); cell.setCellValue(richString); } } } } } workbook.write(o); File srcfile[] = new File[fileNames.size()]; for (int i = 0, n1 = fileNames.size(); i < n1; i++) { srcfile[i] = new File(fileNames.get(i)); } ZipFiles(srcfile, zip); FileInputStream inStream = new FileInputStream(zip); byte[] buf = new byte[4096]; int readLength; while (((readLength = inStream.read(buf)) != -1)) { out.write(buf, 0, readLength); } inStream.close(); } } //获取文件名字 public static String getFileName(){ // 文件名获取 Date date = new Date(); SimpleDateFormat format = new SimpleDateFormat("yyyyMMddHHmmss"); String f = title + format.format(date); return f; } //压缩文件 public static void ZipFiles(java.io.File[] srcfile, java.io.File zipfile) { byte[] buf = new byte[1024]; try { ZipOutputStream out = new ZipOutputStream(new FileOutputStream( zipfile)); for (int i = 0; i < srcfile.length; i++) { FileInputStream in = new FileInputStream(srcfile[i]); out.putNextEntry(new ZipEntry(srcfile[i].getName())); int len; while ((len = in.read(buf)) > 0) { out.write(buf, 0, len); } out.closeEntry(); in.close(); } out.close(); } catch (IOException e) { e.printStackTrace(); } } /** 设置响应头 */ public void setResponseHeader(HttpServletResponse response,String fileName) { try { this.title=fileName; response.reset();// 清空输出流 response.setContentType("application/octet-stream;charset=UTF-8"); response.setHeader("Content-Disposition", "attachment;filename=" +new String(this.title.getBytes("GB2312"), "8859_1") + ".zip"); response.addHeader("Pargam", "no-cache"); response.addHeader("Cache-Control", "no-cache"); } catch (Exception ex) { ex.printStackTrace(); } } } |
二、JavaAction 调取工具类:apache
/*** * 会员浏览日志查询报表-Excel导出 * @return */ @SkipValidation public String exportlogCustomerDownload() { ExportToExcelUtil<LogCustomerDownload> excelUtil = new ExportToExcelUtil<LogCustomerDownload>(); // 导出总记录数 excelTatol = request.getParameter("excelTatol") == null ? 10 : Integer.parseInt(request.getParameter("excelTatol")); OutputStream out = null; try { out = response.getOutputStream(); excelUtil.setResponseHeader(response,"会员下载日志表"); String[] headers = { "会员id", "下载类型 ", "资源id","开始时间","结束时间","下载描述"}; String[] columns = { "customerId", "downloadType","resourceId","startTime","endTime","downloadDesc"}; // 浏览 List<LogCustomerDownload> dataset = service .getList(getQueryJsonAuthObject()); excelUtil.exportExcel( headers, columns, dataset, out, request, ""); } catch (Exception e1) { e1.printStackTrace(); } finally { try { out.flush(); out.close(); } catch (Exception e) { e.printStackTrace(); } } return null; } |
三、JS调取:app
//会员浏览日志查询报表-Excel导出function exportRecord(){ //标示:是否导出用户详细 if(excelTatol > 5000){ $.messager.show({ title:'提示信息!' , msg:'导出数据不能超过5000条!' }); }else{ var data = $.toJSON(getCustomerSearch()); window.location.href="logCustomerDownloadAction!exportlogCustomerDownload?queryJson="+data+"&excelTatol="+excelTatol; }} |