# 數(shù)據(jù)庫連接信息
spring.datasource.url=jdbc:mysql://localhost:3306/testdb
spring.datasource.username=root
spring.datasource.password=123456
spring.datasource.driver-class-name=com.mysql.cj.jdbc.Driver

# JPA 配置
spring.jpa.hibernate.ddl-auto=update
spring.jpa.show-sql=true
spring.jpa.properties.hibernate.dialect=org.hibernate.dialect.MySQLDialect

# MySQL 8.0 的 URL 推薦格式
spring.datasource.url=jdbc:mysql://localhost:3306/testdb?useUnicode=true&characterEncoding=utf8mb4&serverTimezone=UTC&useSSL=false

<dependency>
    <groupId>mysql</groupId>
    <artifactId>mysql-connector-java</artifactId>
    <version>8.0.33</version> <!-- 5.1.x 適用于 MySQL 5.7 -->
</dependency>

ALTER USER 'root'@'localhost' IDENTIFIED WITH mysql_native_password BY 'password';

spring.datasource.url=jdbc:mysql://localhost:3306/testdb?useSSL=false&serverTimezone=UTC
spring.datasource.username=root
spring.datasource.password=123456
spring.datasource.driver-class-name=com.mysql.cj.jdbc.Driver

spring.jpa.hibernate.ddl-auto=update
spring.jpa.show-sql=true
spring.jpa.properties.hibernate.dialect=org.hibernate.dialect.MySQL57Dialect

spring.datasource.url=jdbc:mysql://localhost:3306/testdb?useUnicode=true&characterEncoding=utf8mb4&serverTimezone=UTC&useSSL=false
spring.datasource.username=root
spring.datasource.password=123456
spring.datasource.driver-class-name=com.mysql.cj.jdbc.Driver

spring.jpa.hibernate.ddl-auto=update
spring.jpa.show-sql=true
spring.jpa.properties.hibernate.dialect=org.hibernate.dialect.MySQL8Dialect

import jakarta.persistence.Entity;
import jakarta.persistence.GeneratedValue;
import jakarta.persistence.GenerationType;
import jakarta.persistence.Id;

@Entity
public class User {
    @Id
    @GeneratedValue(strategy = GenerationType.IDENTITY)
    private Long id;

    private String name;

    private String email;

    // Getters and setters omitted for brevity
}

import org.springframework.data.jpa.repository.JpaRepository;

public interface UserRepository extends JpaRepository<User, Long> {
}

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.CommandLineRunner;
import org.springframework.stereotype.Component;

@Component
public class DatabaseTest implements CommandLineRunner {

    @Autowired
    private UserRepository userRepository;

    @Override
    public void run(String... args) throws Exception {
        User user = new User();
        user.setName("豪哥");
        user.setEmail("hao@example.com");

        userRepository.save(user);
        System.out.println("User saved: " + user);
    }
}