最近在做專案時需要每日更新大小額支援的銀行列表資訊，該檔案從核心下載，並使用java專案解析放到資料庫中，該檔案是文字檔案，一行為一條記錄，記錄中以逗號分隔欄位，欄位以雙引號包裹，起初以這種規則自己寫一個小程式也能用，於是寫了幾句程式碼，確實能執行解析出大部分內容，但有些特殊情況是沒有解析出來的，例如：雙引號包裹的的欄位內容裡面也有逗號，但這個逗號並不是欄位之間的分隔符，而是欄位內容的一部分。起初並不知道這其實是一種標準的csv格式，雖然曲折但是整好了記錄下

package com.schedule;

import java.io.BufferedReader;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.InputStreamReader;
import java.sql.Connection;
import java.sql.PreparedStatement;
import java.text.DateFormat;
import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.Date;
import java.util.List;
import java.util.regex.Matcher;
import java.util.regex.Pattern;

import javax.sql.DataSource;

import org.apache.commons.lang3.time.DateUtils;
import org.apache.log4j.Logger;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Value;

import com.ynet.ifp.eams.core.util.FtpUtils;
import com.ynet.ifp.eams.utils.file.UncompressFileGZIP;
import org.springframework.stereotype.Component;

/**
 * 更新大小額聯行號資訊 暫定每天晚上11點執行
 */
@Component("firstUpdatePxdzfInfoSchedule")
public class FirstUpdatePxdzfInfoScheduleImpl extends EamsScheduledService {
 private static Logger log = Logger.getLogger(FirstUpdatePxdzfInfoScheduleImpl.class);
 
   @Autowired
   private com.ynet.ifp.core.utils.TxUtils txUtils;
   @Autowired
   private DataSource dataSource;
   @Value("${hx.bank.host}")
   private String host;
   @Value("${hx.bank.port}")
   private int port;
   @Value("${hx.bank.path}")
   private String path;
   @Value("${hx.bank.name}")
   private String name;
   @Value("${hx.bank.pwd}")
   private String pwd;
   @Value("${hx.bank.fileName}")
   private String fileName;
   @Value("${hx.bank.down.path}")
   private String downPath;

 public String getCnName() {
  return "定時任務--更新大小額聯行號資訊";
 }

 @Override
 protected void doService() throws Exception {
  Connection con= null;
  try{
  log.info("updatePxdzfInfoSchedule schedule is going to start.....");
  Date date = new Date();
  //凌晨一點取昨天3點左右放的檔案
  Date tDay = DateUtils.addDays(date, -2);
   DateFormat df = new SimpleDateFormat("yyyyMMdd");
   String dateStr=df.format(tDay);

   BufferedReader  reader = null;
   String path =downPath+"PXDZF.unl";
   String line= "";
   try {
    reader = new BufferedReader (new InputStreamReader(new FileInputStream(new File(path)),"GBK"));
   } catch (FileNotFoundException e) {
    e.printStackTrace();
   }
//   獲取連線
     con= dataSource.getConnection();
           con.setAutoCommit(false);
           String deleteSql="delete from yc_pxdzf";
        PreparedStatement deleteStat= con.prepareStatement(deleteSql);
            log.info(deleteSql);
             deleteStat.execute();
             con.commit();
   String serialNumber = "yc_id_sequence.nextVal";
       String sql="insert into YC_PXDZF (YC_FQHHO2, YC_ZHUANT, YC_JIGULB, YC_HANBDM, YC_C2ZCHH, YC_BHSJCY, YC_C2RHDM, YC_FBHHO2, YC_QSHHO2, YC_JIEDDM,"+
                " YC_FKHMC1, YC_CXUMC1, YC_YLIUBZ, YC_SUSDDM, YC_DIZHI1, YC_YOUZBM, YC_TFDESC, YC_BYZDBE, YC_SXIORQ, YC_SHIXRQ, YC_BEIZXX, YC_BEIY40,"+
                " YC_BYBZ01, YC_BYBZ02, YC_WEIHRQ, YC_WEIHSJ, YC_WEIHGY, YC_ROWIDD, YC_SHJNCH, YC_JILUZT,YC_ID)  values "+
                "(?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,"+serialNumber+")";
          PreparedStatement stat= con.prepareStatement(sql);

          int t=0;
   while((line=reader.readLine())!=null){
    String regExp =getRegExp();
     String str = "";
     Pattern pattern = Pattern.compile(regExp);
                 Matcher matcher = pattern.matcher(line);
                 List listTemp = new ArrayList();
                 while(matcher.find()) {
                     str = matcher.group();
                     str = str.trim();
                     if (str.endsWith(",")){
                         str = str.substring(0, str.length()-1);
                         str = str.trim();
                     }
                     if (str.startsWith("\"") && str.endsWith("\"")) {
                         str = str.substring(1, str.length()-1);
                         if (isExisted("\"\"", str)) {
                             str = str.replaceAll("\"\"", "\"");
                         }
                     }
                     if (!"".equals(str)) {
                         listTemp.add(str);
                     }
                 }
    
    String[] pmsbankno = (String[]) listTemp.toArray(new String[listTemp.size()]);
    for(int i=0;i<pmsbankno.length;i++){
     String tempString=pmsbankno[i];
     tempString=tempString.replaceAll("\"", "").trim();
     pmsbankno[i]=tempString;

    }
     stat.setString(1,pmsbankno[0]);
             stat.setString(2,pmsbankno[1]);
             stat.setString(3, pmsbankno[2]);
             stat.setString(4,pmsbankno[3]);
             stat.setString(5,pmsbankno[4]);
             stat.setString(6,pmsbankno[5]);
             stat.setString(7,pmsbankno[6]);
             stat.setString(8, pmsbankno[7]);
             stat.setString(9,pmsbankno[8]);
             stat.setString(10,pmsbankno[9]);
             stat.setString(11,pmsbankno[10]);
             stat.setString(12, pmsbankno[11]);
             stat.setString(13, pmsbankno[12]);
             stat.setString(14, pmsbankno[13]);
             stat.setString(15, pmsbankno[14]);
             stat.setString(16,pmsbankno[15]);
             stat.setString(17, pmsbankno[16]);
             stat.setString(18,pmsbankno[17]);
             stat.setString(19,pmsbankno[18]);
             stat.setString(20, pmsbankno[19]);
             stat.setString(21,pmsbankno[20]);
             stat.setString(22, pmsbankno[21]);
             stat.setString(23,pmsbankno[22]);
             stat.setString(24, pmsbankno[23]);
             stat.setString(25,pmsbankno[24]);
             stat.setString(26, pmsbankno[25]);
             stat.setString(27, pmsbankno[26]);
             stat.setString(28, pmsbankno[27]);
             stat.setString(29, pmsbankno[28]);
             stat.setString(30, pmsbankno[29]);
             stat.addBatch();
               if(t%100==0){
                 int[] resultInt=stat.executeBatch();
                 con.commit();
               }
   
   }
    int[] resultInt=stat.executeBatch();
          String updateSql="update BATCH_JOB_EXECUTION e set e.end_time = sysdate where e.END_TIME is NULL and  e.job_instance_id in (select i.job_instance_id from BATCH_JOB_INSTANCE i where i.job_name = 'updatePxdzfInfoSchedule')";
       PreparedStatement updatestat= con.prepareStatement(updateSql);
        updatestat.execute();
           con.commit();
           con.close();

  }catch(Exception e){
   e.printStackTrace();
   con.close();
  }
 }
  private String getRegExp() {
         String strRegExp = "";
         strRegExp =
             "\"(("+ SPECIAL_CHAR_A + "*[,\\n 　])*("+ SPECIAL_CHAR_A + "*\"{2})*)*"+ SPECIAL_CHAR_A + "*\"[ 　]*,[ 　]*"
             +"|"+ SPECIAL_CHAR_B + "*[ 　]*,[ 　]*"
             + "|\"(("+ SPECIAL_CHAR_A + "*[,\\n 　])*("+ SPECIAL_CHAR_A + "*\"{2})*)*"+ SPECIAL_CHAR_A + "*\"[ 　]*"
             + "|"+ SPECIAL_CHAR_B + "*[ 　]*";
         return strRegExp;
     }
    
     private static final String SPECIAL_CHAR_A = "[^\",\\n 　]";
     private static final String SPECIAL_CHAR_B = "[^\",\\n]";
     private boolean isExisted(String argChar, String argStr) {
         boolean blnReturnValue = false;
         if ((argStr.indexOf(argChar) >= 0)
                 && (argStr.indexOf(argChar) <= argStr.length())) {
             blnReturnValue = true;
         }
         return blnReturnValue;
     }
 
}