OceanBase Cloud快速入门第22期：如何用 SpringBoot 连接 OceanBase 数据库？

欢迎访问 OceanBase 官网获取更多信息：https://www.oceanbase.com/

本文介绍 SpringBoot 连接示例。

环境配置

JDK1.8 和 OceanBase 3.x（MySQL 模式/Oracle 模式）

示例代码

Pom.xml 文件

<?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.alipay.test</groupId>
    <artifactId>SpringBootOracleJPA</artifactId>
    <version>1.0-SNAPSHOT</version>
    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.0.1.RELEASE</version>
    </parent>
    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
            <exclusions>
                <exclusion>
                    <artifactId>spring-boot-starter-json</artifactId>
                    <groupId>org.springframework.boot</groupId>
                </exclusion>
            </exclusions>
        </dependency>
        <dependency>
            <groupId>com.oceanbase</groupId>
            <artifactId>oceanbase-client</artifactId>
            <version>2.4.0</version>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-data-jpa</artifactId>
        </dependency>
        <dependency>
            <groupId>junit</groupId>
            <artifactId>junit</artifactId>
            <version>3.8.1</version>
            <scope>test</scope>
        </dependency>
        <dependency>
            <groupId>com.fasterxml.jackson.core</groupId>
            <artifactId>jackson-databind</artifactId>
            <version>2.8.5</version>
        </dependency>
    </dependencies>
</project>

application.yml 文件

server:
  port: 8081
spring:
  jpa:
    database: oracle
    show-sql: true
  datasource:
      driver-class-name: com.alipay.oceanbase.jdbc.Driver
      url: jdbc:oceanbase://host:port/test?characterEncoding=UTF-8
      username: **u***
      password: **p***
#spring.jpa.hibernate.ddl-auto=update
jackson:
  serialization:
    indent_output: true

测试类

相关代码如下：

package com.alipay;

import javax.persistence.*;
import java.io.Serializable;
import java.sql.Date;

/*
 * CREATE TABLE A(id integer, flightNo varchar2(50))
 *
 */
@Entity
@Table( name = "A" )
public class A implements Serializable {
    public Integer getFlightId() {
        return flightId;
    }

    public void setFlightId(Integer flightId) {
        this.flightId = flightId;
    }

    public String getFlightNo() {
        return flightNo;
    }

    public void setFlightNo(String flightNo) {
        this.flightNo = flightNo;
    }

    @Id
//    @GeneratedValue
// oracle 没有自增策略，添加该注解可以自动生成一个序列，提供自增主键，若数据库已有相关序列，可以忽 //略该注解。
    @Column(name = "id")
    private Integer flightId;

    @Column( name = "flightNo" )
    private String flightNo;

}
package com.alipay;

import org.springframework.data.jpa.repository.JpaRepository;
import org.springframework.stereotype.Repository;

@Repository
public interface AMapper extends JpaRepository<A, Integer> {

}
package com.alipay;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

import java.util.Optional;

@RestController
@RequestMapping("/")
public class Test {
    @Autowired
    private AMapper a;
    @GetMapping("/{id}")
    public String getOne(@PathVariable int id) {

        Optional<A> obj = a.findById(id);
        String result = "A.id is:" + obj.get().getFlightId() + ", no is :" + obj.get().getFlightNo();
        System.out.println(result);
        return result;
    }
}
package com.alipay;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;

@SpringBootApplication
public class App
{
    public static void main( String[] args )
    {
        SpringApplication.run(App.class, args);
    }
}

运行上面的代码，返回如下日志则表示启动成功。

然后通过 http://localhost:8081/xxxxx 就可以访问数据库， xxxxx 就是对应的数据库 id 字段，如果数据库存在就可以查询到结果。

欢迎访问 OceanBase 官网获取更多信息：https://www.oceanbase.com/