SpringBoot+Hibernate搭建项目_springboot hibernate配置

        近期整理了对象关系映射对象的知识点，其中就涉及到了Hibernate相关的知识及内容，在此记录一下，以免忘记！PS：虽然不一定能用的上，有备无患吧。

一、搭建项目

1）打开开发工具，选择maven项目，默认使用下一步，设定项目名称直至完成。

在pom.xml中添加依赖，依赖如下：

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"      xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>
    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.6.4</version>
        <relativePath/> <!-- lookup parent from repository -->
    </parent>
    <groupId>org.example</groupId>
    <artifactId>myhibernet</artifactId>
    <version>1.0-SNAPSHOT</version>
    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>
        <!--导入hibernate-->
        <dependency>
            <groupId>org.hibernate</groupId>
            <artifactId>hibernate-entitymanager</artifactId>
        </dependency>
        <dependency>
            <groupId>org.hibernate</groupId>
            <artifactId>hibernate-core</artifactId>
        </dependency>
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <scope>runtime</scope>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-data-jpa</artifactId>
        </dependency>
    </dependencies>
 
</project>

2）建立yml配置文件完成链接数据库：

server:
  port: 80
spring:
  datasource:
    url: jdbc:mysql://localhost:3306/xxx?useUnicode=true&characterEncoding=utf8&useSSL=true&serverTimezone=GMT
    driver-class-name: com.mysql.cj.jdbc.Driver
    username: root
    password: xxxxxxxxx
    hikari:
      #池中最大链接数
      maximum-pool-size: 50
      #池中链接最长生命周期
      max-lifetime: 120000
      #连接允许在池中闲置的最长时间
      idle-timeout: 600000
      #等待来自池的连接的最大毫秒数
      connection-timeout: 30000
      #池中最小空闲链接数
      minimum-idle: 10

3）配置启动类

package com.jl.nyxy;
 
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
 
@SpringBootApplication
public class MyhibernetApplication {
    public static void main(String[] args) {
        SpringApplication.run(MyhibernetApplication.class,args);
    }
}

4）定义配置类

@Configuration
@EnableJpaRepositories
@EnableTransactionManagement
public class HibernateConfig {
    @Value("${spring.datasource.url}")
    private String jdbcUrl;
    @Value("${spring.datasource.username}")
    private String username;
    @Value("${spring.datasource.password}")
    private String password;
    @Value("${spring.datasource.driver-class-name}")
    private String driverClassName;
 
    @Autowired
    private SessionFactory sessionFactory;
    
    @Bean
    public DataSource dataSource(){
        return DataSourceBuilder.create()
                .url(jdbcUrl)
                .username(username)
                .password(password)
                .driverClassName(driverClassName)
                .build();
    }
 
    @Bean
    public LocalSessionFactoryBean localSessionFactoryBean(){
        Properties properties=new Properties();
        properties.setProperty("hibernate.show_sql", "true");
        properties.setProperty("hibernate.format_sql", "true");
        properties.setProperty("hibernate.hbm2ddl.auto", "update");
        /**
         * 如果是高版本的mysql，请使用MySQLDialect,低版本使用MySQL5Dialect
         */
        properties.setProperty("hibernate.dialect", "org.hibernate.dialect.MySQLDialect");
        LocalSessionFactoryBean lsb=new LocalSessionFactoryBean();
        lsb.setDataSource(dataSource());
        /**
         * 设置实体类的位置
         */
        lsb.setPackagesToScan("com.jl.nyxy.pojo");
        lsb.setHibernateProperties(properties);
        return lsb;
    }
    
    @Bean
    public HibernateTemplate hibernateTemplate(){
        HibernateTemplate hibernateTemplate = new HibernateTemplate();
        hibernateTemplate.setSessionFactory(sessionFactory);
        return hibernateTemplate;
    }
 
}

5）建立实体类

import javax.persistence.*;
@Entity
@Table(name = "person")
public class Person {
    @Id
    @GeneratedValue(strategy = GenerationType.IDENTITY)
    @Column(name = "id")
    private int id;
    @Column(name = "personName")
    private String personName;
    @Column(name = "personEmail")
    private String personEmail;
    @Column(name = "personPhone")
    private String personPhone;
    @Column(name = "contactText")
    private String contactText;
 
    /**
    *省略了get和set
    **/
}

6）配置控制类

@RestController
@RequestMapping("person")
public class PersonController {
    @Autowired
    HibernateTemplate hibernateTemplate;
 
   @RequestMapping("findAll")
    public List<Person> findAll(Person person){
        List<Person> persons = hibernateTemplate.findByExample(person);
        return persons;
    }
 
}

以上项目搭建完成，启动SpringBoot服务进行测试。

二、测试

访问接口，观察数据库中的数据库已经查出。

查出结果：