数据结构实践1——学生档案管理系统

算法

排序算法自己曾经的总结，这里不再赘述：链接: https://blog.youkuaiyun.com/m0_46113894/article/details/109520450.
文件的存储与读取：

• 使用BufferReader缓冲流读取，并使用装饰模式，使用输入流与文件流构造
• 使用BufferWriter写文件，构造时注意：文件流第二个参数写false，这样写的时候不会接着文件的末尾加上去，而是重写文件。
• 采用特定文本格式存储，每次读取一行，使用String的split方法根据逗号分隔字符串，借此提取出字符串中的信息，并顺序的存入Array List列表中
• 
• 写的时候顺序遍历列表，通过构造该格式的字符串再一行一行地写入文件

new BufferedReader(new InputStreamReader(new FileInputStream(fileName), “UTF-8”));
new BufferedWriter(new OutputStreamWriter(new FileOutputStream(fileName, false)));

代码

pojo

Student类

package StudentInfoManage.pojo;

/**
 * @author LiuWei
 */
public class Student {
   

    private int id;
    private String name;
    private String major;
    private int cpp;
    private int network;
    private int dataStructure;
    private int english;
    private int total;
    private int ranking;

    private static int studentNum=1;

    public Student(){
   

    }

    /**
     * 新增学生所需构造函数，id自动生成，提供格式与存储格式相同
     * @param name
     * @param major
     * @param cpp
     * @param network
     * @param dataStructure
     * @param english
     */
    public Student(String name, String major, int cpp, int network, int dataStructure, int english) {
   
        this.id=studentNum++;
        this.name = name;
        this.major = major;
        this.cpp = cpp;
        this.network = network;
        this.dataStructure = dataStructure;
        this.english = english;
        this.total =this.cpp+this.network+this.dataStructure+this.english;
        this.ranking=0;
    }

    /**
     * 文件读取用，所有参数为String,无id，总分，排名
     * @param name
     * @param major
     * @param cpp
     * @param network
     * @param dataStructure
     * @param english
     */
    public Student( String name, String major, String cpp, String network, String dataStructure, String english) {
   
        this.id=studentNum++;
        this.name = name;
        this.major = major;
        this.cpp =Integer.parseInt(cpp);
        this.network =Integer.parseInt( network);
        this.dataStructure = Integer.parseInt(dataStructure);
        this.english = Integer.parseInt(english);
        this.total =this.cpp+this.network+this.dataStructure+this.english;
        this.ranking = 0;
    }

    /**
     * 提供所有参数，用于读取文件中学生信息完全都有的情况，所有参数为String
     * @param id
     * @param name
     * @param major
     * @param cpp
     * @param network
     * @param dataStructure
     * @param english
     * @param total
     * @param ranking
     */
    public Student(String id, String name, String major, String cpp, String network, String dataStructure, String english, String total, String ranking) {
   
        this.id=Integer.parseInt(id);
        //遇到更大的id自动按大号生成
        if(this.id>studentNum){
   
            studentNum=this.id+1;
        }
        this.name = name;
        this.major = major;
        this.cpp =Integer.parseInt(cpp);
        this.network =Integer.parseInt( network);
        this.dataStructure = Integer.parseInt(dataStructure);
        this.english = Integer.parseInt(english);
        this.total =this.cpp+this.network+this.dataStructure+this.english;
        this.ranking = Integer.parseInt(ranking);
    }

    /**
     * 用于读取文件的不同情况
     * @param id
     * @param name
     * @param major
     * @param cpp
     * @param network
     * @param dataStructure
     * @param english
     */
    public Student(String id ,String name, String major, String cpp, String network, String dataStructure, String english) {
   
        this.id=Integer.parseInt(id);
        this.name = name;
        this.major = major;
        this.cpp =Integer.parseInt(cpp);
        this.network =Integer.parseInt( network);
        this.dataStructure = Integer.parseInt(dataStructure);
        this.english = Integer.parseInt(english);
        this.total =this.cpp+this.network+this.dataStructure+this.english;
        this.ranking = 0;
    }

    public int getId() {
   
        return id;
    }

    public String getName() {
   
        return name;
    }

    public void setName(String name) {
   
        this.name = name;
    }

    public String getMajor() {
   
        return major;
    }

    public void setMajor(String major) {
   
        this.major = major;
    }

    public int getCpp() {
   
        return cpp;
    }

    public void setCpp(int cpp) {
   
        this.cpp = cpp;
    }

    public int getNetwork() {
   
        return network;
    }

    public void setNetwork(int network) {
   
        this.network = network;
    }

    public int getDataStructure() {
   
        return dataStructure;
    }

    public void setDataStructure(int dataStructure) {
   
        this.dataStructure = dataStructure;
    }

    public int getEnglish() {
   
        return english;
    }

    public void setEnglish(int english) {
   
        this.english = english;
    }

    public int getTotal() {
   
        return total;
    }

    public void setTotal(int total) {
   
        this.total = total;
    }

    public int getRanking() {
   
        return ranking;
    }

    public void setRanking(int ranking) {
   
        this.ranking = ranking;
    }

    public String getAllInfo(){
   
        return new String(id+","+name+","+major+","+cpp+","+network+","+dataStructure+","+english+","+total+","+ranking);
    }

    public void setAllScore(int cpp,int network,int dataStructure,int english) {
   
        this.cpp = cpp;
        this.network=network;
        this.dataStructure=dataStructure;
        this.english=english;
        this.total=cpp+network+dataStructure+english;
    }

    public void showAll(){
   
        System.out.println(id+"  "+name+"   "+major+"  "+cpp+"  "+network+"  "+ dataStructure+"  "+english+"  "+total+"  "+ranking);
    }

}

Account类

package StudentInfoManage.pojo;

/**
 * @author lw
 */
public class Account {
   
    /**账户编号*/
    private int accountId;
    /**账户名称*/
    private String accountName;
    /**密码*/
    private String password;

    static int accountNum=1;
    public Account( String accountName, String password) {
   
        this.accountId =accountNum++ ;
        this.accountName = accountName;
        this.password = password;
    }

    public Account() {
   
    }

    public int getAccountId() {
   
        return accountId;
    }