代碼：
import java.io.FileNotFoundException; import java.io.FileReader; import java.io.IOException; import java.io.LineNumberReader; import java.util.regex.Matcher; import java.util.regex.Pattern; /** * 找出Java文件裏的字符串 * @author 逆火 * * 2019年11月19日 下午9:12:59 */ public class FindStringInJavaFile { public static void main(String[] args) { // 最外層(.....):group(1) // \":匹配字符串開始的雙引號，單個\爲轉義 // 內層(...)*:前後引號中間的文本，*爲括號中的模式重複0-n次 // \\\\\":匹配\" // \\\\\\\\:匹配\\ // \\\\n:匹配\n // [^\"]:除了雙引號之外的字符 // \":匹配字符串結束開始的雙引號，單個\爲轉義
// 注意：對於通常運用，可能 java.util.regex.Pattern pattern=Pattern.compile("(\"(\\\\\"|[^\"])*\")"); 就足夠了。
java.util.regex.Pattern pattern=Pattern.compile("(\"(\\\\\"|\\\\\\\\|\\\\n|[^\"])*\")"); try (LineNumberReader lineNumberReader = new LineNumberReader(new FileReader("D:\\logs\\InsertThread.java"));){ String line = null; while ((line = lineNumberReader.readLine()) != null) { Matcher matcher=pattern.matcher(line); while(matcher.find()) { System.out.println("Line " + lineNumberReader.getLineNumber() +":" + matcher.group(0)); } } } catch (FileNotFoundException ex) { ex.printStackTrace(); } catch (IOException ex) { ex.printStackTrace(); } } }
輸出：
Line 63:"Begin to access " Line 63:" as " Line 63:"..." Line 71:"#" Line 71:" " Line 71:" records were inserted to table:'" Line 71:"' used " Line 83:"Can't close stmt/conn because of " Line 97:"SELECT COUNT (*) as cnt FROM " Line 102:"cnt" Line 123:"yyyy-MM-dd HH:mm:ss" Line 141:"truncate table " Line 143:"truncated table:" Line 161:":" Line 174:"''{" Line 174:"}''" Line 184:"INSERT ALL " Line 191:" select * from dual" Line 197:"#" Line 197:"-" Line 197:" " Line 197:" records inserted to '" Line 197:"' used " Line 212:" INTO " Line 212:"(" Line 217:"," Line 219:") values(" Line 222:"PK" Line 223:"'" Line 223:"'" Line 225:"DELIVERY_INFO_HISTORY" Line 226:"'0'" Line 228:"'" Line 228:"'" Line 230:"CH" Line 231:"'0'" Line 232:"US" Line 233:"'BatcherUser'" Line 234:"DT" Line 235:"to_date('" Line 235:"','yyyy-MM-dd HH24:mi:ss')" Line 238:"," Line 239:")" Line 261:"d" Line 261:"h" Line 261:"m" Line 261:"s" Line 263:"h" Line 263:"m" Line 263:"s" Line 265:"m" Line 265:"s" Line 267:"s"
用作查找目標的Java文件：
package com.hy.insert.multithread; import java.sql.Connection; import java.sql.DriverManager; import java.sql.ResultSet; import java.sql.SQLException; import java.sql.Statement; import java.text.SimpleDateFormat; import java.util.ArrayList; import java.util.Calendar; import java.util.Date; import java.util.List; import org.apache.log4j.Logger; import com.hy.DBParam; /** * 刪單表線程 * @author 逆火 * * 2019年11月17日 上午9:24:39 */ public class InsertThread extends Thread{ private static Logger log = Logger.getLogger(InsertThread.class); private final int BatchSize=250;// 一次性插入記錄數 private int tableIndex;// 表序號 private String tableName;// tablename private int count;// record count will be inserted private String[] innerArr;// array contains field type and names private InsertManager manager;// reference to InsertManager /** * Constructor * @param tableIndex * @param tableName * @param count * @param innerArr * @param mng */ public InsertThread(int tableIndex,String tableName,int count,String[] innerArr,InsertManager mng) { this.tableIndex=tableIndex; this.tableName=tableName; this.count=count; this.innerArr=innerArr; this.manager=mng; } /** * Run body here */ public void run() { Connection conn = null; Statement stmt = null; try{ long startTime = System.currentTimeMillis(); Class.forName(DBParam.Driver).newInstance(); conn = DriverManager.getConnection(DBParam.DbUrl, DBParam.User, DBParam.Pswd); stmt = conn.createStatement(); log.info("Begin to access "+DBParam.DbUrl+" as "+DBParam.User+"..."); truncateTable(tableName,conn,stmt); insertDataToTable(tableIndex,tableName,count,innerArr,conn,stmt); if(isAllInserted(count,tableName,stmt)) { long endTime = System.currentTimeMillis(); String timeElasped=sec2DHMS(startTime,endTime); log.info("#"+tableIndex+" "+count+" records were inserted to table:'" + tableName + "' used " + timeElasped ); manager.reportFinished(String.valueOf(tableIndex), tableName, timeElasped); } } catch (Exception e) { System.out.print(e.getMessage()); } finally { try { stmt.close(); conn.close(); } catch (SQLException e) { log.error("Can't close stmt/conn because of " + e.getMessage()); } } } /** * judge if all records are inserted * @param count * @param table * @param stmt * @return * @throws SQLException */ private boolean isAllInserted(int count,String table,Statement stmt) throws SQLException { String sql="SELECT COUNT (*) as cnt FROM "+table; ResultSet rs = stmt.executeQuery(sql); while (rs.next()) { int cnt = rs.getInt("cnt"); return cnt==count; } return false; } /** * get datetime n seconds before * @param n * @param interval * @return */ private static String getDatetimeBefore(int n,int interval) { try { Calendar now = Calendar.getInstance(); now.add(Calendar.SECOND,-n*interval);//鏃ユ湡鍑忓幓n*10縐� Date newDate=now.getTime(); SimpleDateFormat sdf=new SimpleDateFormat("yyyy-MM-dd HH:mm:ss"); String retval = sdf.format(newDate); return retval; } catch(Exception ex) { ex.printStackTrace(); return null; } } /** * delete all data in a table quickly * @param tableName * @param conn * @param stmt * @throws SQLException */ private void truncateTable(String tableName,Connection conn,Statement stmt) throws SQLException{ String sql="truncate table "+tableName; stmt.execute(sql); log.info("truncated table:"+tableName); } /** * Insert date to a table * @param tbSN * @param tableName * @param count * @param innerArr * @param conn * @param stmt * @throws SQLException */ private void insertDataToTable(int tbSN,String tableName,int count,String[] innerArr,Connection conn,Statement stmt) throws SQLException{ // 寰楀埌瀛楁鍚嶅拰瀛楁綾誨瀷 List<TypeField> typefields=new ArrayList<TypeField>(); for(int i=1;i<innerArr.length;i++) { String temp=innerArr[i]; String[] arrTmp=temp.split(":"); TypeField tf=new TypeField(); tf.type=arrTmp[0]; tf.field=arrTmp[1]; typefields.add(tf); } List<String> fields=new ArrayList<String>(); List<String> values=new ArrayList<String>(); int index=0; for(TypeField tf:typefields) { fields.add(tf.field); values.add("''{"+index+"}''"); index++; } int interval=2*365*24*60*60/count;// 涓ゅ勾鐨勭鏁伴櫎浠ユ�諱釜鏁板嵆涓洪棿闅� index=0; int times=count/BatchSize; for(int i=0;i<times;i++) { StringBuilder sb=new StringBuilder(); sb.append("INSERT ALL "); for(int j=0;j<BatchSize;j++) { index=i*BatchSize+j; sb.append(getInsertSql(tableName,typefields,index,interval)); } sb.append(" select * from dual"); String sql = sb.toString(); // long startTime = System.currentTimeMillis(); stmt.executeUpdate(sql); //long endTime = System.currentTimeMillis(); //log.info("#"+tbSN+"-"+i+" "+BatchSize+" records inserted to '"+tableName+"' used " + sec2DHMS(startTime,endTime)); } } /** * get insert sql * @param tableName * @param typefields * @param index * @return */ private String getInsertSql(String tableName,List<TypeField> typefields,int index,int interval) { String currTime=getDatetimeBefore(index,interval); StringBuilder sb=new StringBuilder(); sb.append(" INTO "+tableName+"("); List<String> fields=new ArrayList<String>(); for(TypeField tf:typefields) { fields.add(tf.field); } sb.append(String.join(",",fields)); sb.append(") values("); List<String> values=new ArrayList<String>(); for(TypeField tf:typefields) { if(tf.type.equals("PK")) { //values.add("'"+String.valueOf(index)+"'"); if(tableName.contains("DELIVERY_INFO_HISTORY")) { values.add("'0'"); }else { values.add("'"+String.valueOf(index)+"'"); } }else if(tf.type.equals("CH")) { values.add("'0'"); }else if(tf.type.equals("US")) { values.add("'BatcherUser'"); }else if(tf.type.equals("DT")) { values.add("to_date('"+currTime+"','yyyy-MM-dd HH24:mi:ss')"); } } sb.append(String.join(",",values)); sb.append(")"); String insertSql=sb.toString(); return insertSql; } /** * change seconds to DayHourMinuteSecond format * @param stratMs * @param endMs * @return */ private static String sec2DHMS(long stratMs,long endMs) { String retval = null; long secondCount=(endMs-stratMs)/1000; long days = secondCount / (60 * 60 * 24); long hours = (secondCount % (60 * 60 * 24)) / (60 * 60); long minutes = (secondCount % (60 * 60)) / 60; long seconds = secondCount % 60; if (days > 0) { retval = days + "d" + hours + "h" + minutes + "m" + seconds + "s"; } else if (hours > 0) { retval = hours + "h" + minutes + "m" + seconds + "s"; } else if (minutes > 0) { retval = minutes + "m" + seconds + "s"; } else { retval = seconds + "s""; } return retval; } /** * Inner class,used for inner data structure * @author 逆火 * * 2019年11月17日 上午9:27:47 */ protected static final class TypeField{ String type; String field; } }
參考資料：https://www.zhihu.com/question/47381844
--END-- 2019年11月19日21:15:17