1、創建SpringBoot工程,添加相關依賴
<?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>
<groupId>com.example</groupId>
<artifactId>jpa</artifactId>
<version>0.0.1-SNAPSHOT</version>
<packaging>jar</packaging>
<name>jpa</name>
<description>Demo project for Spring Boot</description>
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>2.0.4.RELEASE</version>
<relativePath/> <!-- lookup parent from repository -->
</parent>
<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
<java.version>1.8</java.version>
</properties>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-data-jpa</artifactId>
</dependency>
<!-- Mysql依賴 -->
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<scope>runtime</scope>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-devtools</artifactId>
</dependency>
<dependency>
<groupId>com.alibaba</groupId>
<artifactId>fastjson</artifactId>
<version>1.2.51</version>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
</plugins>
</build>
</project>
2、添加相關配置相關配置文件
########################################################
###datasource
########################################################
spring:
datasource:
url: jdbc:mysql://111.230.180.89:3306/springboot
username: root
password: xu0719wd
driver-class-name: com.mysql.jdbc.Driver
jpa:
database: MYSQL
show-sql: true
#Hibernate ddl auto
hibernate:
ddl-auto: update
naming-strategy: org.hibernate.cfg.ImprovedNamingStrategy
properties:
hibernate:
dialect: org.hibernate.dialect.MySQL5Dialect
server:
port: 8003
servlet:
context-path: /jpa
3、創建實體類
package com.example.entity;
import javax.persistence.*;
import java.util.Date;
/**
* @author admin
* @date 2018/10/31
*/
@Entity
public class User {
@Id
@GeneratedValue(strategy = GenerationType.IDENTITY)
private Integer id;//指定主鍵及生成策略
@Column
private String name;
@Column(name = "create_time")
private Date createTime;
@Column(name = "department_id")
private Integer departmentId;
public Integer getId() {
return id;
}
public void setId(Integer id) {
this.id = id;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public Date getCreateTime() {
return createTime;
}
public void setCreateTime(Date createTime) {
this.createTime = createTime;
}
public Integer getDepartmentId() {
return departmentId;
}
public void setDepartmentId(Integer departmentId) {
this.departmentId = departmentId;
}
}
4、實現
(1)Repository
package com.example.Repository;
import com.example.entity.User;
import org.springframework.data.repository.CrudRepository;
import org.springframework.stereotype.Repository;
/** * @author admin * @date 2018/10/31 */
@Repository public interface UserRepository extends CrudRepository<User,Integer> { }
(1)PagingAndSorttingRepository
繼承了CrudRepository,又新增了方法
Iterable<T> findAll(Sort var1);
Page<T> findAll(Pageable var1);
(2)JpaRepository提供了更多使用功能,Example對對象進行查詢