java——文档的读写排序

1 张三1 18 男 88 1385551
2 张三 18 女 99 1385552
3 张三 18 男 88 1385553
4 李四1 19 男 66 1385554
5 李四 20 女 88 1385555
6 李四 19 男 66 1385556
7 王五 20 女 87 1385557
8 赵六 18 男 88 1385558
9 周七 19 女 99 1385559
10 马八 18 男 88 1385550
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读取文件student.txt数据：
1.按成绩进行降序排列后
写入新文件newStudent.txt,
所在文件夹可以随意指定。
2.把姓名相同的同学信息
写入日志文件student_log.txt
日志文件要求:
添加信息时间例如
2018-9-17 9:32:52
2 张三 18 女 99
3 张三 18 男 88
5 李四 20 女 88
6 李四 19 男 66
2018-9-17 11:31:18
2 张三 18 女 99 

import java.io.BufferedWriter;
import java.io.*;
import java.io.FileWriter;
import java.util.*;

public class Demo03 {
    public List<Student> setList(String path) {
        List<Student> list = new ArrayList<Student>();
        FileReader fr;
        try {
            fr = new FileReader(path);
            BufferedReader br = new BufferedReader(fr);
            String s = br.readLine();
            while (s != null) {
                Student stu = new Student();
                String str[] =s.split(" ");
                stu.setId(Integer.parseInt(str[0]));
                System.out.println(str[1]);
                stu.setAge(Integer.parseInt(str[2]));
                stu.setSex(str[3]);
                stu.setGrade(Float.parseFloat(str[4]));
                stu.setTel(str[5]);
                list.add(stu);
                s = br.readLine();
            }
            br.close();
            fr.close();
        } catch (IOException e) {
            e.printStackTrace();
        }
        return list;
    }

    public List<Student> array(List<Student> list){
        for (int i = 0; i <list.size()-1 ; i++) {
            for (int j = 0; j <list.size()-1 ; j++) {
                if(list.get(j).getGrade()<list.get(j+1).getGrade()){
                    Student s=list.get(j);
                    list.set(j,list.get(j+1));
                    list.set(j+1,s);
                }
            }
        }
        return list;
    }
   public void write(String newpath,List<Student> list) throws IOException {
       FileWriter fw=new FileWriter(newpath);
       BufferedWriter bw=new BufferedWriter(fw);
       for (int i = 0; i <list.size() ; i++) {
           bw.write(list.get(i).getId() + "\t" +list.get(i).getName() + "\t" +
                   list.get(i).getAge() + "\t" + list.get(i).getSex() + "\t" + list.get(i).getGrade() + "\t" +
                   list.get(i).getTel()+"");
           bw.newLine();
       }
       bw.flush();
       fw.close();
   }
   public void samewrite(String otherpath,List<Student> list) throws IOException {
       FileWriter fw=new FileWriter(otherpath);
       BufferedWriter bw=new BufferedWriter(fw);
       for (int i = 0; i <list.size() ; i++) {
           for (int j = 0; j <list.size() ; j++) {
               if(list.get(1).getName()==list.get(2).getName()&&i!=j){
                   /*bw.write(list.get(i).getId() + "\t" +list.get(i).getName() + "\t" +
                           list.get(i).getAge() + "\t" + list.get(i).getSex() + "\t" + list.get(i).getGrade() + "\t" +
                           list.get(i).getTel()+"");*/
                   bw.newLine();
                   System.out.println(list.get(i).getId() + "\t" +list.get(i).getName() + "\t" +
                           list.get(i).getAge() + "\t" + list.get(i).getSex() + "\t" + list.get(i).getGrade() + "\t" +
                           list.get(i).getTel()+"");
                   bw.write(list.get(j).getId() + "\t" +list.get(j).getName() + "\t" +
                           list.get(j).getAge() + "\t" + list.get(j).getSex() + "\t" + list.get(j).getGrade() + "\t" +
                           list.get(j).getTel()+"");
                   bw.newLine();
                   System.out.println(list.get(j).getId() + "\t" +list.get(j).getName() + "\t" +
                           list.get(j).getAge() + "\t" + list.get(j).getSex() + "\t" + list.get(j).getGrade() + "\t" +
                           list.get(j).getTel()+"");
               }
           }
       }
       bw.flush();
       fw.close();

   }
    public static void main(String[] args) throws IOException {
        Demo03 d = new Demo03();
        String path = "D:/student.txt";
        List<Student> list = d.setList(path);
       /* System.out.println("排序前");
        for (Student stu : list) {
            System.out.println(stu.getId() + "\t" + stu.getName() + "\t" +
                    stu.getAge() + "\t" + stu.getSex() + "\t" + stu.getGrade() + "\t" +
                    stu.getTel());
        }*/
//        System.out.println("排序后");
        List<Student> arraylist=d.array(list);
        for (Student stu : arraylist) {
            System.out.println(stu.getId() + "\t" + stu.getName() + "\t" +
                    stu.getAge() + "\t" + stu.getSex() + "\t" + stu.getGrade() + "\t" +
                    stu.getTel());
        }
        String newpath="D:/newstudent.txt";
        d.write(newpath,arraylist);
        String otherpath="D:/student_log.txt";
        d.samewrite(otherpath,list);
    }
}