利用poi实现table表格导出excel

思路：把table转成json数据传到后台(需要用到jquery.tabletojson.min.js)，json转成list>类型。利用poi导出excel

需要先导入poi jar包

前台代码：

<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>  
<%  
String path = request.getContextPath();  
String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";  
%>  
  
                        
  
  
      
  
序号
姓名/td>
name
  
1
张三
zhangsan
  
2
李四
lisi
  
3
王五
wangwu
  
  Export excel 2

    
  

import java.io.IOException;import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;import testExport.ExportExcel;public class TestJsonServlet extends HttpServlet {@Overrideprotected void doPost(HttpServletRequest request,HttpServletResponse response) throws ServletException, IOException {doGet(request, response);}public void doGet(HttpServletRequest request, HttpServletResponse response)throws ServletException, IOException {//json字符串String jsonStr = request.getParameter("json");//表格表头String sheaders = request.getParameter("headers");//表格标题名String title = request.getParameter("fileName");//表格文件名String fileName = request.getParameter("fileName")+".xls";ExportExcel ex = new ExportExcel();ex.export(jsonStr,sheaders,fileName,title, response, request);}}

package testExport;import java.io.BufferedInputStream;
import java.io.BufferedOutputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.swing.JOptionPane;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.HSSFComment;
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.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;/*** 利用开源组件POI3.0.2动态导出EXCEL文档* * @version v1.0* @param *            应用泛型，代表任意一个符合javabean风格的类*            注意这里为了简单起见，boolean型的属性xxx的get器方式为getXxx(),而不是isXxx()*            byte[]表jpg格式的图片数据*/
public class ExportExcel{//文件分隔符"\"（在 UNIX 系统中是“/”）public static final String FILE_SEPARATOR = System.getProperties().getProperty("file.separator");/*** @param jsonStr* 			json字符串* @param sheaders* 			表格表头* @param fileName* 			文件名XXX.xls* @param title*          表格标题名*/public void export(String jsonStr,String sheaders,String fileName,String title,HttpServletResponse response,HttpServletRequest request) {try {// 将json字符串转换为json对象JSONArray jsonArray = new JSONArray(jsonStr);    	String[] headers= sheaders.substring(0,sheaders.length()-1).split(",");System.out.println(sheaders.substring(0,sheaders.length()-1));int iSize = jsonArray.length();List list = new ArrayList();for (int i = 0; i < iSize; i++) {List line = new ArrayList();JSONObject jsonObject =  jsonArray.getJSONObject(i);System.out.println(jsonObject.toString()+"-----");Iterator iterator = jsonObject.keys();String value = null;int j=0;while (iterator.hasNext()) {iterator.next();value = jsonObject.getString(headers[j]);//表格内容line.add(value);j++;System.out.println(value);}list.add(line);}for(List line:list){for(String s:line){System.out.print(s+"\t");}System.out.println();}String docsPath = request.getSession().getServletContext().getRealPath("exportExcel");//文件路径String filePath = docsPath + FILE_SEPARATOR + fileName;System.out.println(filePath);OutputStream out = new FileOutputStream(filePath);exportExcel(title,headers, list, out);out.close();JOptionPane.showMessageDialog(null, "导出成功!");System.out.println("excel导出成功！");//下载download(filePath, response);} catch (JSONException e) {// TODO Auto-generated catch blocke.printStackTrace();} catch (FileNotFoundException e) {// TODO: handle exceptione.printStackTrace();} catch (IOException e) {// TODO: handle exceptione.printStackTrace();}}/*** 这是一个通用的方法，利用了JAVA的反射机制，可以将放置在JAVA集合中并且符号一定条件的数据以EXCEL 的形式输出到指定IO设备上* * @param title*            表格标题名* @param headers*            表格属性列名数组* @param list*            需要显示的数据集合* @param out*            与输出设备关联的流对象，可以将EXCEL文档导出到本地文件或者网络中*/private void exportExcel(String title, String[] headers,List list, OutputStream out) {// 声明一个工作薄HSSFWorkbook workbook = new HSSFWorkbook();// 生成一个表格HSSFSheet sheet = workbook.createSheet(title);// 设置表格默认列宽度为15个字节sheet.setDefaultColumnWidth((short) 15);// 生成一个样式HSSFCellStyle style = workbook.createCellStyle();// 设置这些样式style.setFillForegroundColor(HSSFColor.SKY_BLUE.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 = 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);// 生成并设置另一个样式HSSFCellStyle style2 = workbook.createCellStyle();style2.setFillForegroundColor(HSSFColor.LIGHT_YELLOW.index);style2.setFillPattern(HSSFCellStyle.SOLID_FOREGROUND);style2.setBorderBottom(HSSFCellStyle.BORDER_THIN);style2.setBorderLeft(HSSFCellStyle.BORDER_THIN);style2.setBorderRight(HSSFCellStyle.BORDER_THIN);style2.setBorderTop(HSSFCellStyle.BORDER_THIN);style2.setAlignment(HSSFCellStyle.ALIGN_CENTER);style2.setVerticalAlignment(HSSFCellStyle.VERTICAL_CENTER);// 生成另一个字体HSSFFont font2 = workbook.createFont();font2.setBoldweight(HSSFFont.BOLDWEIGHT_NORMAL);// 把字体应用到当前的样式style2.setFont(font2);// 声明一个画图的顶级管理器HSSFPatriarch patriarch = sheet.createDrawingPatriarch();// 定义注释的大小和位置,详见文档HSSFComment comment = patriarch.createComment(new HSSFClientAnchor(0,0, 0, 0, (short) 4, 2, (short) 6, 5));// 设置注释内容comment.setString(new HSSFRichTextString("可以在POI中添加注释！"));// 设置注释作者，当鼠标移动到单元格上是可以在状态栏中看到该内容.comment.setAuthor("leno");// 产生表格标题行HSSFRow row = sheet.createRow(0);for (short i = 0; i < headers.length; i++) {HSSFCell cell = row.createCell(i);cell.setCellStyle(style);HSSFRichTextString text = new HSSFRichTextString(headers[i]);cell.setCellValue(text);}// 遍历集合数据，产生数据行for(int i=0;i line = list.get(i);row = sheet.createRow(i+1);for(int j=0;j

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