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罗祥
2019-01-03 18:03:04 +08:00
parent 5d41bacf9a
commit 86cfd2b61b
7 changed files with 237 additions and 2 deletions
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54
spring-boot/spring-boot-data-jpa/pom.xml Normal file
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<?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>2.1.1.RELEASE</version>
<relativePath/> <!-- lookup parent from repository -->
</parent>
<groupId>com.heibaiying</groupId>
<artifactId>spring-boot-data-jpa</artifactId>
<version>0.0.1-SNAPSHOT</version>
<name>spring-boot-data-jpa</name>
<description>data jpa project for Spring Boot</description>
<properties>
<java.version>1.8</java.version>
</properties>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-data-jpa</artifactId>
</dependency>
<!--引入mysql驱动-->
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>8.0.13</version>
</dependency>
<dependency>
<groupId>org.projectlombok</groupId>
<artifactId>lombok</artifactId>
<optional>true</optional>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
</plugins>
</build>
</project>

14
spring-boot/spring-boot-data-jpa/src/main/java/com/heibaiying/springboot/SpringBootDataJpaApplication.java Normal file
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package com.heibaiying.springboot;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
@SpringBootApplication
public class SpringBootDataJpaApplication {
public static void main(String[] args) {
SpringApplication.run(SpringBootDataJpaApplication.class, args);
}
}

52
spring-boot/spring-boot-data-jpa/src/main/java/com/heibaiying/springboot/bean/Programmer.java Normal file
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package com.heibaiying.springboot.bean;
import lombok.AllArgsConstructor;
import lombok.Data;
import lombok.NoArgsConstructor;
/*
* 需要注意是的 这里导入的与JPA相关注解全部是 javax.persistence 包下面的
* 尤其是 @Id不要导成org.springframework.data.annotation.Id
* 不然会抛出 No identifier specified for entity 异常
*/
import javax.persistence.*;
import java.util.Date;
/**
* @author : heibaiying
*/
@Data
@AllArgsConstructor
@NoArgsConstructor
@Entity // 表示该类是一个数据库表映射实体
@Table(name = "programmer") // 指明对应的数据库表的名称 不指定的默认就是类名
public class Programmer {
/* AUTO: 默认值,主键由程序控制
* IDENTITY: 数据库自动增长, Oracle不支持这种方式 ORACLE 靠序列来提供类似自增长的功能
* SEQUENCE: 通过数据库的序列产生主键, MYSQL不支持 MYSQL没有序列的概念
* Table: 提供特定的数据库产生主键
*/
@Id
@GeneratedValue(strategy = GenerationType.IDENTITY)
private int id;
@Column(length = 200)
private String name;
private int age;
@Column(scale = 2)
private float salary;
private Date birthday;
public Programmer(String name, int age, float salary, Date birthday) {
this.name = name;
this.age = age;
this.salary = salary;
this.birthday = birthday;
}
}

44
spring-boot/spring-boot-data-jpa/src/main/java/com/heibaiying/springboot/dao/ProgRepository.java Normal file
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package com.heibaiying.springboot.dao;
import com.heibaiying.springboot.bean.Programmer;
import org.springframework.data.domain.Page;
import org.springframework.data.domain.Pageable;
import org.springframework.data.domain.Sort;
import org.springframework.data.jpa.repository.Query;
import org.springframework.data.repository.CrudRepository;
import org.springframework.data.repository.query.Param;
import java.util.List;
/**
* @author : heibaiying
* @description : 查询接口 继承自CrudRepository CrudRepository 默认实现了部分增删改查方法
*/
public interface ProgRepository extends CrudRepository<Programmer, Integer> {
/*
*方法名遵循命名规范的查询 更多命名规范可以参考官方文档所列出的这张表格
* https://docs.spring.io/spring-data/jpa/docs/2.1.3.RELEASE/reference/html/#jpa.query-methods.query-creation
*/
List<Programmer> findAllByName(String name);
/*
*分页查询
*/
List<Programmer> findByAndSort(String name, Sort sort);
/*
* 占位符查询
*/
@Query(value = "select u from Programmer u where u.name = ?1 or u.salary = ?2")
List<Programmer> findByCondition(String name, float salary);
/*
* 传入参数名称
*/
@Query("select u from Programmer u where u.name = :name or u.age = :age")
Programmer findByParam(@Param("name") String name,
@Param("age") int age);
}

14
spring-boot/spring-boot-data-jpa/src/main/resources/application.yml Normal file
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spring:
datasource:
url: jdbc:mysql://127.0.0.1:3306/mysql?useUnicode=true&characterEncoding=utf-8
username: root
password: root
driver-class-name: com.mysql.cj.jdbc.Driver
jpa:
hibernate:
# <20><><EFBFBD><EFBFBD>ʵ<EFBFBD>岻һ<E5B2BB><D2BB>ʱ<EFBFBD><CAB1>,<2C><><EFBFBD><EFBFBD>Ӧ<EFBFBD>ĸ<EFBFBD><C4B8><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ݿ<EFBFBD><DDBF>еı<D0B5><C4B1>ṹ<EFBFBD><E1B9B9><EFBFBD><EFBFBD><EFBFBD>Ǵ<EFBFBD><C7B4>ڱ<EFBFBD><DAB1><EFBFBD>ԭ<EFBFBD>ȵ<EFBFBD>ֵ<EFBFBD><D6B5><EFBFBD><EFBFBD>ɾ<EFBFBD><C9BE>
ddl-auto: update
# HibernateĬ<65>ϴ<EFBFBD><CFB4><EFBFBD><EFBFBD>ı<EFBFBD><C4B1><EFBFBD>myisam<61><6D><EFBFBD>棬<EFBFBD><E6A3AC><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>·<EFBFBD>ʽָ<CABD><D6B8>ΪĬ<CEAA><C4AC>ʹ<EFBFBD><CAB9>innodb<64><62><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
database-platform: org.hibernate.dialect.MySQL57Dialect
show-sql: true

57
spring-boot/spring-boot-data-jpa/src/test/java/com/heibaiying/springboot/SpringBootDataJpaApplicationTests.java Normal file
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package com.heibaiying.springboot;
import com.heibaiying.springboot.bean.Programmer;
import com.heibaiying.springboot.dao.ProgRepository;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.test.context.SpringBootTest;
import org.springframework.data.domain.Page;
import org.springframework.data.domain.PageRequest;
import org.springframework.data.domain.Sort;
import org.springframework.data.jpa.domain.JpaSort;
import org.springframework.test.context.junit4.SpringRunner;
import java.util.Date;
import java.util.List;
import java.util.Optional;
import java.util.stream.Stream;
@RunWith(SpringRunner.class)
@SpringBootTest
public class SpringBootDataJpaApplicationTests {
@Autowired
private ProgRepository repository;
@Test
public void save() {
repository.save(new Programmer("xiaoxiao", 12, 2121.34f, new Date()));
}
@Test
public void get() {
// 遵循命名规范的查询
List<Programmer> programmers = repository.findAllByName("xiaominng");
programmers.forEach(System.out::println);
// 传入参数名称
Programmer param = repository.findByParam("xiaolan", 21);
System.out.println("findByParam:" + param);
// 占位符查询
List<Programmer> byCondition = repository.findByCondition("xiaolan", 347.34f);
System.out.println("byCondition:" + byCondition);
//条件与分页查询
List<Programmer> programmerList = repository.findByAndSort("xiaominng", Sort.by("salary"));
programmerList.forEach(System.out::println);
}
@Test
public void delete() {
Optional<Programmer> programmer = repository.findById(4);
if (programmer.isPresent()) {
repository.deleteById(4);
}
}
}