java导出大批量(百万以上)数据的excel文件

package com.epay.utils;/** * 大数据量导出成EXCEL或XML * @author qad * 2017-04-22 */import java.io.BufferedOutputStream;import java.io.DataOutputStream;import java.io.File;import java.io.FileNotFoundException;import java.io.FileOutputStream;import java.io.IOException;public class Test {  public static void main(String[] args) {    StringBuffer sb = new StringBuffer();    try {      DataOutputStream rafs = new DataOutputStream(          new BufferedOutputStream(new FileOutputStream(new File(              "d://test.xls"))));      sb.append("<?xml version=/"1.0/" encoding=/"GBK/" ?>");      sb.append("/n");      sb.append("<?mso-application progid=/"Excel.Sheet/"?>");      sb.append("/n");      sb.append("<Workbook xmlns=/"urn:schemas-microsoft-com:office:spreadsheet/"");      sb.append("/n");      sb.append(" xmlns:o=/"urn:schemas-microsoft-com:office:office/"");      sb.append("/n");      sb.append(" xmlns:x=/"urn:schemas-microsoft-com:office:excel/"");      sb.append("/n");      sb.append(" xmlns:ss=/"urn:schemas-microsoft-com:office:spreadsheet/"");      sb.append("/n");      sb.append(" xmlns:html=/"http://www.w3.org/TR/REC-html40/">");      sb.append("/n");      sb.append("<DocumentProperties xmlns=/"urn:schemas-microsoft-com:office:office/"> ");      sb.append("/n");      sb.append(" <Styles>/n");      sb.append(" <Style ss:ID=/"Default/" ss:Name=/"Normal/">/n");      sb.append("  <Alignment ss:Vertical=/"Center/"/>/n");      sb.append("  <Borders/>/n");      sb.append("  <Font ss:FontName=/"宋体/" x:CharSet=/"134/" ss:Size=/"12/"/>/n");      sb.append("  <Interior/>/n");      sb.append("  <NumberFormat/>/n");      sb.append("  <Protection/>/n");      sb.append(" </Style>/n");      sb.append(" </Styles>/n");      int sheetcount = 0;      int recordcount = 65535;      int currentRecord = 0;      int total = 100000;      int col = 20;      sb.append("<Worksheet ss:Name=/"Sheet0/">");      sb.append("/n");      sb.append("<Table ss:ExpandedColumnCount=/"" + col          + "/" ss:ExpandedRowCount=/"" + total          + "/" x:FullColumns=/"1/" x:FullRows=/"1/">");      sb.append("/n");      for (int i = 0; i < total; i++) {        if ((currentRecord == recordcount            || currentRecord > recordcount || currentRecord == 0)            && i != 0) {// 一个sheet写满          currentRecord = 0;          rafs.write(sb.toString().getBytes());          sb.setLength(0);          sb.append("</Table>");          sb.append("<WorksheetOptions xmlns=/"urn:schemas-microsoft-com:office:excel/">");          sb.append("/n");          sb.append("<ProtectObjects>False</ProtectObjects>");          sb.append("/n");          sb.append("<ProtectScenarios>False</ProtectScenarios>");          sb.append("/n");          sb.append("</WorksheetOptions>");          sb.append("/n");          sb.append("</Worksheet>");          sb.append("<Worksheet ss:Name=/"Sheet" + i / recordcount              + "/">");          sb.append("/n");          sb.append("<Table ss:ExpandedColumnCount=/"" + col              + "/" ss:ExpandedRowCount=/"" + recordcount              + "/" x:FullColumns=/"1/" x:FullRows=/"1/">");          sb.append("/n");        }        sb.append("<Row>");        for (int j = 0; j < col; j++) {          System.out.println(i);          sb.append("<Cell><Data ss:Type=/"String/">111</Data></Cell>");          sb.append("/n");        }        sb.append("</Row>");        if (i % 5000 == 0) {          rafs.write(sb.toString().getBytes());          rafs.flush();          sb.setLength(0);        }        sb.append("/n");        currentRecord++;      }      rafs.write(sb.toString().getBytes());      sb.setLength(0);      sb.append("</Table>");      sb.append("<WorksheetOptions xmlns=/"urn:schemas-microsoft-com:office:excel/">");      sb.append("/n");      sb.append("<ProtectObjects>False</ProtectObjects>");      sb.append("/n");      sb.append("<ProtectScenarios>False</ProtectScenarios>");      sb.append("/n");      sb.append("</WorksheetOptions>");      sb.append("/n");      sb.append("</Worksheet>");      sb.append("</Workbook>");      sb.append("/n");      rafs.write(sb.toString().getBytes());      rafs.flush();      rafs.close();    } catch (FileNotFoundException e) {      e.printStackTrace();    } catch (IOException e) {      e.printStackTrace();    }  }}