java 代码去除复制粘贴代码的前面的数字

今天找代码的时候，发现前面有很多数字，直接拷贝到ｅｃｐｌｉｓｅ中总是前面带有数字，所以写了一段代码，留着用

 

首先　将代码粘贴到ｔｘｔ中，然后

 

import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.PrintWriter;
import java.io.Writer;
import java.sql.CallableStatement;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.SQLException;
import java.util.regex.Matcher;
import java.util.regex.Pattern;



public class test {


	/**
	 * @param args
	 * @throws SQLException 
	 * @throws ClassNotFoundException 
	 */
	public static void main(String[] args)   {
		
		
		File file=new File("C:/My Documents/test.txt");
		if(file.isFile()&&file.exists()){
			try {
				InputStreamReader in=new InputStreamReader(new FileInputStream(file));
				BufferedReader bufferedreader=new BufferedReader(in);
				String b=null;
				FileOutputStream fos=new FileOutputStream("C:/My Documents/test2.txt");
				
				PrintWriter pw=new PrintWriter(fos);
				
				BufferedWriter bufferedwriter=new BufferedWriter(pw);
				while((b=bufferedreader.readLine())!=null){
					
					System.out.println("string b is " +""+b);
					String regex=null;
					regex="^[0-9]+.";
					Pattern pattern=Pattern.compile(regex);
					Matcher mathch=pattern.matcher(b);
					
					if(mathch.find()){
						String s=mathch.replaceAll("");
						System.out.println("string b is " +""+s);
					
					pw.write(s);
					pw.write("\r\n");
					pw.flush();
					
					
					
					}
					
					
					
				}
				pw.close();
				in.close();
				fos.close();
			} catch (FileNotFoundException e) {
				// TODO Auto-generated catch block
				e.printStackTrace();
			} catch (IOException e) {
				// TODO Auto-generated catch block
				e.printStackTrace();
			}
			finally{
				
				
			}
			
			
		}
		
		
			
	}

}