修改readme.md
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罗祥
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@ -53,9 +53,9 @@ spring-cloud：Finchley.SR2
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| [spring-boot-servlet](https://github.com/heibaiying/spring-samples-for-all/tree/master/spring-boot/spring-boot-servlet) | 整合servlet 3.0 | [Embedded Servlet Container Support](https://docs.spring.io/spring-boot/docs/2.1.1.RELEASE/reference/htmlsingle/#boot-features-embedded-container) |
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| [spring-boot-tomcat](https://github.com/heibaiying/spring-samples-for-all/tree/master/spring-boot/spring-boot-tomcat) | spring-boot 整合外部容器（tomcat） | [Use Another Web Server](https://docs.spring.io/spring-boot/docs/2.1.1.RELEASE/reference/htmlsingle/#howto-use-another-web-server) |
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| [spring-boot-jsp](https://github.com/heibaiying/spring-samples-for-all/tree/master/spring-boot/spring-boot-jsp) | spring-boot 整合 jsp | [JSP Limitations](https://docs.spring.io/spring-boot/docs/2.1.1.RELEASE/reference/htmlsingle/#boot-features-jsp-limitations) |
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| spring-boot-jpa | spring-boot jpa 的使用 | [Spring Data JPA](https://docs.spring.io/spring-data/jpa/docs/2.1.3.RELEASE/reference/html/) |
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| spring-boot-data-jpa | spring-boot data jpa 的使用 | [Spring Data JPA](https://docs.spring.io/spring-data/jpa/docs/2.1.3.RELEASE/reference/html/) |
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| spring-boot-mybatis | spring-boot 整合 mybatis<br/>HikariDataSources数据源的配置 | [Mybatis-Spring](http://www.mybatis.org/spring/zh/index.html)<br/>[Mybatis-Spring-Boot-Autoconfigure](http://www.mybatis.org/spring-boot-starter/mybatis-spring-boot-autoconfigure/) |
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| spring-boot-druid-mybtais | spring-boot 整合druid、mybatis | [Alibaba druid](https://github.com/alibaba/druid/wiki/%E5%B8%B8%E8%A7%81%E9%97%AE%E9%A2%98) |
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| spring-boot-druid-mybtais | spring-boot 整合druid、mybatis | [Alibaba druid](https://github.com/alibaba/druid/wiki/%E5%B8%B8%E8%A7%81%E9%97%AE%E9%A2%98)<br/>[druid-spring-boot-starter](https://github.com/alibaba/druid/tree/master/druid-spring-boot-starter) |
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| [spring-boot-redis](https://github.com/heibaiying/spring-samples-for-all/tree/master/spring-boot/spring-boot-redis) | spring-boot 整合 redis | [Working with NoSQL Technologies](https://docs.spring.io/spring-boot/docs/2.1.1.RELEASE/reference/htmlsingle/#boot-features-nosql) |
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| [spring-boot-mongodb](https://github.com/heibaiying/spring-samples-for-all/tree/master/spring-boot/spring-boot-mongodb) | spring-boot 整合 mongodb | [Working with NoSQL Technologies](https://docs.spring.io/spring-boot/docs/2.1.1.RELEASE/reference/htmlsingle/#boot-features-nosql) |
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| [spring-boot-memcached](https://github.com/heibaiying/spring-samples-for-all/tree/master/spring-boot/spring-boot-memcached) | spring-boot 整合 memcached | [Xmemcached](https://github.com/killme2008/xmemcached/wiki/Xmemcached%20%E4%B8%AD%E6%96%87%E7%94%A8%E6%88%B7%E6%8C%87%E5%8D%97) |
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54
spring-boot/spring-boot-data-jpa/pom.xml
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54
spring-boot/spring-boot-data-jpa/pom.xml
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<?xml version="1.0" encoding="UTF-8"?>
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<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
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xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
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<modelVersion>4.0.0</modelVersion>
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<parent>
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<groupId>org.springframework.boot</groupId>
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<artifactId>spring-boot-starter-parent</artifactId>
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<version>2.1.1.RELEASE</version>
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<relativePath/> <!-- lookup parent from repository -->
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</parent>
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<groupId>com.heibaiying</groupId>
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<artifactId>spring-boot-data-jpa</artifactId>
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<version>0.0.1-SNAPSHOT</version>
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<name>spring-boot-data-jpa</name>
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<description>data jpa project for Spring Boot</description>
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<properties>
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<java.version>1.8</java.version>
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</properties>
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<dependencies>
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<dependency>
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<groupId>org.springframework.boot</groupId>
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<artifactId>spring-boot-starter-data-jpa</artifactId>
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</dependency>
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<!--引入mysql驱动-->
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<dependency>
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<groupId>mysql</groupId>
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<artifactId>mysql-connector-java</artifactId>
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<version>8.0.13</version>
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</dependency>
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<dependency>
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<groupId>org.projectlombok</groupId>
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<artifactId>lombok</artifactId>
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<optional>true</optional>
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</dependency>
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<dependency>
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<groupId>org.springframework.boot</groupId>
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<artifactId>spring-boot-starter-test</artifactId>
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<scope>test</scope>
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</dependency>
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</dependencies>
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<build>
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<plugins>
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<plugin>
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<groupId>org.springframework.boot</groupId>
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<artifactId>spring-boot-maven-plugin</artifactId>
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</plugin>
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</plugins>
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</build>
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</project>
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@ -0,0 +1,14 @@
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package com.heibaiying.springboot;
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import org.springframework.boot.SpringApplication;
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import org.springframework.boot.autoconfigure.SpringBootApplication;
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@SpringBootApplication
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public class SpringBootDataJpaApplication {
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public static void main(String[] args) {
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SpringApplication.run(SpringBootDataJpaApplication.class, args);
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}
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}
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@ -0,0 +1,52 @@
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package com.heibaiying.springboot.bean;
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import lombok.AllArgsConstructor;
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import lombok.Data;
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import lombok.NoArgsConstructor;
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/*
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* 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
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* 尤其是 @Id不要导成org.springframework.data.annotation.Id
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* 不然会抛出 No identifier specified for entity 异常
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*/
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import javax.persistence.*;
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import java.util.Date;
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/**
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* @author : heibaiying
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*/
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@Data
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@AllArgsConstructor
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@NoArgsConstructor
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@Entity // 表示该类是一个数据库表映射实体
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@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
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public class Programmer {
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/* AUTO: 默认值,主键由程序控制
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* 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
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* 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
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* Table: 提供特定的数据库产生主键
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*/
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@Id
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@GeneratedValue(strategy = GenerationType.IDENTITY)
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private int id;
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@Column(length = 200)
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private String name;
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private int age;
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@Column(scale = 2)
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private float salary;
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private Date birthday;
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public Programmer(String name, int age, float salary, Date birthday) {
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this.name = name;
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this.age = age;
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this.salary = salary;
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this.birthday = birthday;
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}
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}
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@ -0,0 +1,44 @@
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package com.heibaiying.springboot.dao;
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import com.heibaiying.springboot.bean.Programmer;
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import org.springframework.data.domain.Page;
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import org.springframework.data.domain.Pageable;
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import org.springframework.data.domain.Sort;
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import org.springframework.data.jpa.repository.Query;
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import org.springframework.data.repository.CrudRepository;
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import org.springframework.data.repository.query.Param;
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import java.util.List;
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/**
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* @author : heibaiying
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* @description : 查询接口 继承自CrudRepository CrudRepository 默认实现了部分增删改查方法
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*/
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public interface ProgRepository extends CrudRepository<Programmer, Integer> {
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/*
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*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
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* https://docs.spring.io/spring-data/jpa/docs/2.1.3.RELEASE/reference/html/#jpa.query-methods.query-creation
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*/
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List<Programmer> findAllByName(String name);
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/*
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*分页查询
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*/
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List<Programmer> findByAndSort(String name, Sort sort);
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/*
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* 占位符查询
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*/
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@Query(value = "select u from Programmer u where u.name = ?1 or u.salary = ?2")
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List<Programmer> findByCondition(String name, float salary);
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/*
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* 传入参数名称
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*/
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@Query("select u from Programmer u where u.name = :name or u.age = :age")
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Programmer findByParam(@Param("name") String name,
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@Param("age") int age);
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}
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@ -0,0 +1,14 @@
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spring:
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datasource:
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url: jdbc:mysql://127.0.0.1:3306/mysql?useUnicode=true&characterEncoding=utf-8
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username: root
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password: root
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driver-class-name: com.mysql.cj.jdbc.Driver
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jpa:
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hibernate:
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# 表与实体不一样时候,会相应的更新数据库中的表结构，但是存在表中原先的值不会删除
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ddl-auto: update
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# Hibernate默认创建的表是myisam引擎，可以用以下方式指定为默认使用innodb创建表
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database-platform: org.hibernate.dialect.MySQL57Dialect
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show-sql: true
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@ -0,0 +1,57 @@
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package com.heibaiying.springboot;
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import com.heibaiying.springboot.bean.Programmer;
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import com.heibaiying.springboot.dao.ProgRepository;
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import org.junit.Test;
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import org.junit.runner.RunWith;
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import org.springframework.beans.factory.annotation.Autowired;
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import org.springframework.boot.test.context.SpringBootTest;
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import org.springframework.data.domain.Page;
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import org.springframework.data.domain.PageRequest;
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import org.springframework.data.domain.Sort;
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import org.springframework.data.jpa.domain.JpaSort;
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import org.springframework.test.context.junit4.SpringRunner;
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import java.util.Date;
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import java.util.List;
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import java.util.Optional;
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import java.util.stream.Stream;
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@RunWith(SpringRunner.class)
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@SpringBootTest
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public class SpringBootDataJpaApplicationTests {
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@Autowired
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private ProgRepository repository;
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@Test
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public void save() {
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repository.save(new Programmer("xiaoxiao", 12, 2121.34f, new Date()));
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}
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@Test
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public void get() {
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// 遵循命名规范的查询
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List<Programmer> programmers = repository.findAllByName("xiaominng");
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programmers.forEach(System.out::println);
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// 传入参数名称
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Programmer param = repository.findByParam("xiaolan", 21);
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System.out.println("findByParam:" + param);
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// 占位符查询
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List<Programmer> byCondition = repository.findByCondition("xiaolan", 347.34f);
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System.out.println("byCondition:" + byCondition);
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//条件与分页查询
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List<Programmer> programmerList = repository.findByAndSort("xiaominng", Sort.by("salary"));
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programmerList.forEach(System.out::println);
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}
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@Test
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public void delete() {
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Optional<Programmer> programmer = repository.findById(4);
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if (programmer.isPresent()) {
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repository.deleteById(4);
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}
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}
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}
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