去除多余字符的代码

import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileReader;
import java.io.FileWriter;
import java.io.IOException;

public class ReplaceFileLine {

	/**
	 * 读取源文件，把更新的内容写到新的文件里
	 * @param file
	 * @param file2
	 */
	public void replaceLine(File file,File file2) {
		try {
			BufferedReader reader = new BufferedReader(new FileReader(file));
			BufferedWriter writer = new BufferedWriter(new FileWriter(file2));
			String line = reader.readLine();
			
			while(line != null) {
				String newline = line.substring(2);
				System.out.println(newline);
				writer.write(newline);
				writer.newLine();
				line = reader.readLine();
			}
			reader.close();
			writer.close();
		} catch (Exception e) {
			e.printStackTrace();
		}
	} 
	
	
	
	public static void main(String[] args) {
		
		File file = new File("D:\\test.txt");
		File file2 =new File("D:\\receive.txt");
		ReplaceFileLine rf = new ReplaceFileLine();
		rf.replaceLine(file,file2);
	}
}