Java操作POI批量导出多个excle

一、前端JS

//站内搜索查询报表-Excel导出function exportRecord(){var browseUrl=$("#browseUrl").val();  if(browseUrl == null || browseUrl == ""){  $.messager.show({title : '友好提示',msg : '浏览资源ID,不能为空！'});return ;  }else{  var data = $.toJSON(getCustomerSearch());  window.location.href="statResourceBrowseAction!exportStatResourceBrowse?queryJson="+data+"&excelTatol="+excelTatol;  }}

二、Java请求处理

 //站内搜索查询报表-Excel导出public void exportStatResourceBrowse() {ExportToExcelUtil<StatResourceBrowse> excelUtil = new ExportToExcelUtil<StatResourceBrowse>();// 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,"资源浏览统计表");String[] headers = { "会员id",  "医师职称", "专业领域", "省","医院等级id","医院等级","操作途径"};String[] columns = { "customerId", "medicalTitle","areasExpertise", "province","hospitalLevelId","hospitalLevel","opSource"};List<StatResourceBrowse> dataset = service.getList(getQueryJsonKeywordObject());excelUtil.exportExcel( headers, columns, dataset, out, request, "");} catch (Exception e1) {e1.printStackTrace();} finally {try {out.flush();out.close();} catch (Exception e) {e.printStackTrace();}}}

三、POI导出excle工具类

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做处理；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));}}        // 声明一个工作薄       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();// 创建样式对象         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(); // 创建字体对象         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，然后应用样式，就可以水平垂直居中         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{                          //其它数据类型都当作字符串简单处理                          textValue = value.toString();                       }                                            if(textValue!= null){                          Pattern p = Pattern.compile("^//d+(//.//d+)?$");                            Matcher matcher = p.matcher(textValue);                          if(matcher.matches()){                             //是数字当作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();}} }