java使用POI jar包读写xls文件

主要使用poi jar来操作excel文件。代码中用到的数据库表信息见ORACLE之表。使用public ArrayList<Person> getPersonAllRecords()获得所有的记录。

 public class PersonXLS {

     public static void main(String[] args) throws IOException {

         Workbook newExcel=new HSSFWorkbook();//创建一个excel
         DBUtil dbUtil=new DBUtil();//数据库工具类
         Sheet newSheet0=newExcel.createSheet("Person Info");//创建一个sheet
         String[] title={"MAP_ID","PERSON_CODE","PERSON_NAME","SEX","INSERT_TIME","UPDATE_TIME","POSITION","SALARY","DEPT"};//表头
         SimpleDateFormat sdf;
         Row newRow0=newSheet0.createRow(0);//创建表头
           int i=0;
           for(String s:title){//写入表头
               Cell cell=newRow0.createCell(i++);
               cell.setCellValue(s);
           }
           long sql_begin = System.currentTimeMillis();
           dbUtil.getConn();//数据库连接
           ArrayList<Person> persons=dbUtil.getPersonAllRecords();//获取记录
           sdf=new SimpleDateFormat("MM/dd/yyyy");
           for(i=0;i<persons.size();i++){//写入记录
               Row newRow=newSheet0.createRow(i+1);
               newRow.createCell(0).setCellValue(persons.get(i).getMap_id());
               newRow.createCell(1).setCellValue(persons.get(i).getPerson_code());
               newRow.createCell(2).setCellValue(persons.get(i).getPerson_name());
               newRow.createCell(3).setCellValue(persons.get(i).getSex());
               newRow.createCell(4).setCellValue(sdf.format(persons.get(i).getInsert_time()));
               newRow.createCell(5).setCellValue(sdf.format(persons.get(i).getUpdate_time()));
               newRow.createCell(6).setCellValue(persons.get(i).getPosition());
               newRow.createCell(7).setCellValue(persons.get(i).getSalary());
               newRow.createCell(8).setCellValue(persons.get(i).getDept());
           }
           sdf=new SimpleDateFormat("yyyyMMddHHmmss");
           FileOutputStream fos=new FileOutputStream("PersonInfo"+sdf.format(new Date())+System.currentTimeMillis()+".xls");//创建
           newExcel.write(fos);//向输入流写入数据
           System.out.println("sql cost :"+(System.currentTimeMillis()-sql_begin)+"ms.");//数据操作花费时间
     }
 }

output: