Integration of spring boot and mysql

1. Add pom dependencies

<dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-data-jpa</artifactId>
        <version> 1.5.8.RELEASE</version>

    </dependency>

2. Create entity table and JpaRepository

Add the following annotations to the entity table

@Entity

@Table(name = "realtablename")

JpaRepository declares as follows

@Repository
public interface TestRepository extends JpaRepository<Test,Long> {
    List<About> findAll();
}

3. Common queries and usage

General queries are declared by connecting multiple query conditions directly with And

CustomerShipAddr findByUidAndIsdefault(int uid,int isdefount);

4. Simple joint table

@OneToOne
@JoinColumn(name="picture")
private  GoodImage image;

The above statement will load the corresponding GoodImage table through the picture column, and there are many-to-many, one-to-many is not used for the time being.

5. Affairs

Add transaction support

Just add the annotation @Transactional to the Service method that accesses the database. If you don't need transactions, don't add such annotations.