Java操作POI批量导出多个excle，打压缩包
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 excelUtil = new ExportToExcelUtil();
// 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 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 {
//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 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 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 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();
}
}
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