高分悬赏，缺少下载分别错过！Java语言怎么实现？txt读取问题

Question

高分悬赏，Java语言怎么实现？
从txt文件中读取10个学生的信息，包括姓名、年龄、语文、数学、英语
然后根据成绩平均分按照从大到小排序输出。
谁给我完整代码，我就采纳谁。

Answer 1

package com.eyecool.abis;

import java.io.BufferedReader;
import java.io.File;
import java.io.FileReader;
import java.util.ArrayList;
import java.util.Comparator;
import java.util.List;

/**

• 假设不存在重名的情况

• @author Administrator
  *
  */
  // 姓名|年龄|语文|数学|英语
  // 张三|18|98|99|90
  // 李四|19|98|90|87
  public class Demo {

  public static void main(String[] args) {
  // TODO Auto-generated method stub
  Demo demo = new Demo();
  String path = "E:\demo.txt";
  List students = demo.getStudentInfo(path);
  // 接下来进行排序
  students.sort(new Comparator() {

      @Override
      public int compare(Object arg0, Object arg1) {
          // TODO Auto-generated method stub
          Student stu0 = (Student) arg0;
          Student stu1 = (Student) arg1;
          Double avg0 = stu0.getAverageScore();
          Double avg1 = stu1.getAverageScore();
          return -avg0.compareTo(avg1);//注意-符合
      }
  
  });
  // 打印输出
  for (Student student : students) {
      System.out.println("姓名：" + student.getName() + ",平均分：" + student.getAverageScore());
  }
  

  }

  public List getStudentInfo(String path) {
  File file = new File(path);
  BufferedReader br = null;
  List students = null;
  try {
  br = new BufferedReader(new FileReader(file));// 构造一个BufferedReader类来读取文件
  String s = null;
  int lineNum = 0;
  students = new ArrayList();
  while ((s = br.readLine()) != null) {// 使用readLine方法，一次读一行
  if (lineNum == 0) {// 姓名|年龄|语文|数学|英语
  lineNum++;
  continue;
  }
  Student student = createStudent(s);
  students.add(student);
  lineNum++;
  }
  } catch (Exception e) {
  e.printStackTrace();
  } finally {
  if (br != null) {
  try {
  br.close();
  } catch (Exception ex) {
  ex.printStackTrace();
  }
  }
  }
  return students;
  }

  public Student createStudent(String s) {
  // 此处只考虑严格的数据格式：张三|18|98|99|90，其他的未考虑
  String str[] = s.split("\|");
  String name = str[0];
  String age = str[1];
  String chineseScore = str[2];
  String matchScore = str[3];
  String englishScore = str[4];

  Student student = new Student();
  student.setName(name);
  student.setAge(age);
  student.setChineseScore(chineseScore);
  student.setMatchScore(matchScore);
  student.setEnglishScore(englishScore);
  // 计算平均分
  List<Double> scores = new ArrayList<Double>();
  scores.add(Double.valueOf(chineseScore));
  scores.add(Double.valueOf(matchScore));
  scores.add(Double.valueOf(englishScore));
  student.setAverageScore(countAvg(scores));
  return student;
  

  }

  public Double countAvg(List scores) {
  Double sum = 0.00;
  for (Double score : scores) {
  sum += score;
  }
  int size = scores.size();
  java.text.DecimalFormat df = new java.text.DecimalFormat("#.00");
  return Double.valueOf(df.format(sum / size));
  }

  public class Student {
  public Student() {
  }

  private String name;
  private String age;
  private String chineseScore;
  private String matchScore;
  private String englishScore;
  private Double averageScore;
  
  public String getName() {
      return name;
  }
  
  public void setName(String name) {
      this.name = name;
  }
  
  public String getAge() {
      return age;
  }
  
  public void setAge(String age) {
      this.age = age;
  }
  
  public String getChineseScore() {
      return chineseScore;
  }
  
  public void setChineseScore(String chineseScore) {
      this.chineseScore = chineseScore;
  }
  
  public String getMatchScore() {
      return matchScore;
  }
  
  public void setMatchScore(String matchScore) {
      this.matchScore = matchScore;
  }
  
  public String getEnglishScore() {
      return englishScore;
  }
  
  public void setEnglishScore(String englishScore) {
      this.englishScore = englishScore;
  }
  
  public Double getAverageScore() {
      return averageScore;
  }
  
  public void setAverageScore(Double averageScore) {
      this.averageScore = averageScore;
  }
  

  }
  }