【Java 篇】Maven 的神奇魔法与集合的奇妙世界：在 Java 编程领域中探索代码的奥秘之旅

# 配置MAVEN_HOME环境变量
MAVEN_HOME=D:/apache-maven-3.6.3

<mirror>
<id>alimaven</id>
<name>aliyun maven</name>
<url>http://maven.aliyun.com/nexus/content/groups/public/</url>
<mirrorOf>central</mirrorOf>
</mirror>

<mirror>
<id>aliyunmaven</id>
<mirrorOf>*</mirrorOf>
<name>阿里云公共仓库</name>
<url>https://maven.aliyun.com/repository/public</url>
</mirror>

url = jdbc:mysql://localhost:3306/user?useUnicode=true&characterEncoding=utf8
driver = com.mysql.jdbc.Driver

url = jdbc:mysql://localhost:3306/ssq?serverTimezone=UTC&characterEncoding=utf8&useUnicode=true&useSSL=false
driver = com.mysql.cj.jdbc.Driver

package com.shool.test2;
import java.util.Scanner;

public class Test2 {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        while (true) {
            System.out.println("欢迎使用京东商城");
            System.out.println("1. 登录");
            System.out.println("2. 注册");
            System.out.println("3. 查询所有商品");
            System.out.println("4. 添加商品");
            System.out.println("5. 退出");

            System.out.println("请选择:");
            int choice = sc.nextInt();
            switch (choice) {
                case 1:
                    System.out.println("登录操作");
                    break;
                case 2:
                    System.out.println("注册操作");
                    break;
                case 3:
                    System.out.println("查询所有商品");
                    break;
                case 4:
                    System.out.println("添加商品");
                    break;
                case 5:
                    System.out.println("退出");
                    System.exit(0);
                    break;
            }
        }
    }
}

package com.shool.test2;
import java.util.Scanner;
/**
●
@version 1.0
●
@Author yishu
●
@Date 2024-12-24 10:48
●
@注释
 */
public class Test2 {
 public static void main(String[] args) {
 Scanner sc = new Scanner(System.in);
 while (true){
     System.out.println("欢迎使用京东商城");
     System.out.println("1.登录");
     System.out.println("2.注册");
     System.out.println("3.查询所有商品");
     System.out.println("4.添加商品");
     System.out.println("5.退出");

     System.out.println("请选择:");
     int chioce = sc.nextInt();
     switch (chioce){
         case 1:
             System.out.println("登录操作");
             break;
         case 2:
             System.out.println("注册操作");
             break;
         case 3:
             System.out.println("查询所有商品");
             break;
         case 4:
             System.out.println("添加商品");
             break;
         case 5:
             System.out.println("退出");
             System.exit(0);
             break;
     }
 }
 }
}

package com.shool.entity;
import java.util.Objects;
/**
●
@version 1.0
●
@Author yishu
●
@Date 2024-12-24 11:08
●
@注释
 */
public class Users {
private String uname;
private String upwd;


public String getUname() {
    return uname;
}

public void setUname(String uname) {
    this.uname = uname;
}

public String getUpwd() {
    return upwd;
}

public void setUpwd(String upwd) {
    this.upwd = upwd;
}

public Users() {
}



public Users(String uname, String upwd) {
    this.uname = uname;
    this.upwd = upwd;
}

@Override
public boolean equals(Object o) {
    if (this == o) return true;
    if (o == null || getClass() != o.getClass()) return false;
    Users users = (Users) o;
    return Objects.equals(uname, users.uname) && Objects.equals(upwd, users.upwd);
}

@Override
public int hashCode() {
    return Objects.hash(uname, upwd);
}

@Override
public String toString() {
    return "Users{" +
            ", uname='" + uname + '\'' +
            ", upwd='" + upwd + '\'' +
            '}';
}
}