按顺序读写文件

读txt文件，然后按顺序写txt文件：

package com.file.test;

import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.File;
import java.io.FileReader;
import java.io.FileWriter;
import java.util.ArrayList;
import java.util.Arrays;

public class Task {

	public static void main(String[] args) throws Exception {
		File fi = new File("D:/source.txt");
		File fo = new File("D:/result.txt");
		String s1;
		String[] s2;
		ArrayList<Worker> al = new ArrayList<Worker>();
		BufferedReader bf = new BufferedReader(new FileReader(fi));
		BufferedWriter bw = new BufferedWriter(new FileWriter(fo));
		while ((s1 = bf.readLine()) != null) {
			s2 = s1.split(" ");
			if (s2.length == 2) {
				al.add(new Worker(s2[0], Integer.parseInt(s2[1])));
			}
			else {
				System.out.println("文件格式有误！");
				System.exit(-1); //终止当前运行的虚拟机
			}
		}
		//***************************************
//		
//		for (Worker worker : al) {
//			String str = worker.getName();
//			int iv = worker.getSalary();
//			
//			System.out.println(str);
//			System.out.println(iv);
//		}
		//****************************************
		bf.close();
		Worker[] ws = new Worker[1];
		ws = al.toArray(ws);
		Arrays.sort(ws);
		for (int i = 0; i < ws.length; i++) {
			String s = ws[i].getName() + " " + ws[i].getSalary();
			bw.write(s);
			bw.newLine();
		}
		bw.close();
		System.out.println("排序成功，查看结果！");
	}
}

class Worker implements Comparable<Worker> {
	private String name;
	private int salary;

	public Worker(String name, int salary) {
		this.name = name;
		this.salary = salary;
	}

	public String getName() {
		return name;
	}

	public int getSalary() {
		return salary;
	}

	public int compareTo(Worker o) {
		if (this.salary > o.getSalary()) {
			return 1;
		} else if (this.salary < o.salary) {
			return -1;
		} else{
			return 0;
		}
//		return this.salary > o.getSalary() ? 1 : (this.salary < o.salary ? -1 : 0);
		
	}	
}