通过Docker安装启动DB2在Spring Boot整合DB2的方法

目录

• 1 简介
• 2 Docker安装DB2
• Spring Boot整合DB2
• 代码
• PS：Docker中安装DB2详细教程

1 简介

DB2是IBM的一款优秀的关系型数据库，简单学习一下。

2 Docker安装DB2

为了快速启动，直接使用Docker来安装DB2。先下载镜像如下：

docker pull ibmcom/db2:11.5.0.0

启动数据库如下：

docker run -itd \
  --name mydb2 \
	--privileged=true \
	-p 50000:50000 \
	-e LICENSE=accept \
	-e DB2INST1_PASSWORD=pkslow \
	-e DBNAME=testdb \
	ibmcom/db2:11.5.0.0

这样获得的数据库，具体信息如下：

连接URL：jdbc:db2://localhost:50000/testdb

用户名：db2inst1

密码：pkslow

在IDEA上连接如下：

默认的Schema为DB2INST1，测试SQL如下：

创建表：

CREATE TABLE EMPLOYEE_SALARY
(DEPTNO   CHAR(3)      NOT NULL,
 DEPTNAME VARCHAR(36)  NOT NULL,
 EMPNO    CHAR(6)      NOT NULL,
 SALARY   DECIMAL(9,2) NOT NULL WITH DEFAULT);

插入数据：

INSERT INTO EMPLOYEE_SALARY (DEPTNO, DEPTNAME, EMPNO, SALARY) VALUES ('001', 'IT', '001322', 80000.00);
INSERT INTO EMPLOYEE_SALARY (DEPTNO, DEPTNAME, EMPNO, SALARY) VALUES ('001', 'IT', '001323', 20000.00);
INSERT INTO EMPLOYEE_SALARY (DEPTNO, DEPTNAME, EMPNO, SALARY) VALUES ('002', 'Architecture', '001324', 3220.00);
INSERT INTO EMPLOYEE_SALARY (DEPTNO, DEPTNAME, EMPNO, SALARY) VALUES ('002', 'Architecture', '001325', 8000.00);
INSERT INTO EMPLOYEE_SALARY (DEPTNO, DEPTNAME, EMPNO, SALARY) VALUES ('003', 'Front Office', '001326', 13320.00);
INSERT INTO EMPLOYEE_SALARY (DEPTNO, DEPTNAME, EMPNO, SALARY) VALUES ('001', 'IT', '001327', 5433.00);

查询：

SELECT * FROM DB2INST1.EMPLOYEE_SALARY;

Spring Boot整合DB2

添加相关依赖：

<dependencies>
  <dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-web</artifactId>
  </dependency>
  <dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-data-jpa</artifactId>
  </dependency>
  <dependency>
    <groupId>com.ibm.db2</groupId>
    <artifactId>jcc</artifactId>
    <version>11.5.0.0</version>
  </dependency>
</dependencies>

配置相关属性：

server.port=8082
spring.datasource.url=jdbc:db2://localhost:50000/testdb
spring.datasource.username=db2inst1
spring.datasource.password=pkslow
spring.jpa.generate-ddl=true

创建Entity：

package com.pkslow.springboot.jpa.db2.entity;

import lombok.AllArgsConstructor;
import lombok.Data;
import lombok.NoArgsConstructor;

import javax.persistence.Entity;
import javax.persistence.Id;
import javax.persistence.Table;

@Entity
@Data
@AllArgsConstructor
@NoArgsConstructor
@Table(name = "EMPLOYEE", schema = "DB2INST1")
public class Employee {
    @Id
    private Long id;
    private String name;
}

创建Repository类用于操作数据库：

public interface EmployeeRepository extends CrudRepository<Employee, Long> {
}

最后，写个方法测试一下：

@Configuration
@Slf4j
public class TestConfig {
    @Autowired
    private EmployeeRepository repository;

    @PostConstruct
    public void init() {
        Employee employee1 = new Employee(1L, "Larry Deng");
        Employee employee2 = new Employee(2L, "LarryDpk");
        Employee employee3 = new Employee(3L, "Pkslow");

        repository.deleteAll();
        repository.save(employee1);
        repository.save(employee2);
        repository.save(employee3);

        List<Employee> employees = StreamSupport.stream(repository.findAll().spliterator(), false)
                .collect(Collectors.toList());

        employees.forEach(e -> log.info(e.toString()));

    }
}

启动后，日志打印正常如下：

2022-02-28 23:26:22.476  INFO 60847 --- [           main] c.pkslow.springboot.jpa.db2.TestConfig   : Employee(id=1, name=Larry Deng)
2022-02-28 23:26:22.476  INFO 60847 --- [           main] c.pkslow.springboot.jpa.db2.TestConfig   : Employee(id=2, name=LarryDpk)
2022-02-28 23:26:22.476  INFO 60847 --- [           main] c.pkslow.springboot.jpa.db2.TestConfig   : Employee(id=3, name=Pkslow)

表数据如下：

代码

代码请看GitHub: https://github.com/LarryDpk/pkslow-samples

References：

Docker Image

Statements Insert

PS：Docker中安装DB2详细教程

docker安装db2 1、查询可安装的db2镜像2、下载db2镜像3、安装镜像4、切换用户并运行DB25、常用命令6、遇到的坑7、参考文章 1、查询可安装的db2镜像

这里是单机安装，直接安装db2express-c，介绍网址 : libmcom / db2express-c

docker search db2express-c1

2、下载db2镜像

docker pull ibmoms/db2express-c

这里我选用的是ibmoms/db2express-c，尝试过网上教程上的很多镜像，安装完之后都有坑-_-||。

3、安装镜像

docker run -it  --name db2 -p 50000:50000 -e DB2INST1_PASSWORD=db2 -e LICENSE=accept ibmoms/db2express-c:latest bash

-p 50000:50000 允许远程的客户端可以从50000 端口连接到数据库实例.通过指定 -e DB2INST1_PASSWORD=db2root-pwd 参数, 你可以为缺省的Db2实例用户db2inst1设置密码.注意：这里“DB2INST1”是用户名，而“b2root-pwd”是密码。通过指定-e LICENSE=accept参数, 表示你接受了使用Db2软件的许可证协议.

有教程说要添加 –network=host ，我在添加后各种莫名的报错╮(╯▽╰)╭

4、切换用户并运行DB2

	$ su - db2inst1     //切换用户
	$ db2start          //启动DB2
	$ db2sampl          //创建默认数据库“SAMPLE”

5、常用命令

	db2 create db [dbname] #创建数据库 
	db2 list db directory #列出所有数据库 
	db2 list active databases #列出所有激活的数据库 
	db2 get db cfg #列出所有数据库配置 

6、遇到的坑

1.DB2 启动SQL5043N

解决方案: DB2 启动SQL5043N
官方解答: infocenter答案

[db2inst1@connections ~]$ db2level
DB21085I This instance or install (instance name, where applicable:
“db2inst1”) uses “64” bits and DB2 code release “SQL10014” with level
identifier “0205010E”.
Informational tokens are “DB2 v10.1.0.4”, “s140509”, “IP23584”, and Fix Pack
“4”.
Product is installed at “/opt/ibm/db2/V10.1”.

[db2inst1@connections ~]$ db2start
08/20/2014 22:19:54 0 0 SQL5043N Support for one or more communications protocols specified in the DB2COMM environment variable failed to start successfully. However, core database manager functionality started successfully.
SQL1063N DB2START processing was successful.

[db2inst1@connections ~]$ db2set DB2COMM=tcpip

[db2inst1@connections ~]$ db2stop
2014-08-20 22:21:17 0 0 SQL1064N DB2STOP processing was successful.
SQL1064N DB2STOP processing was successful.

[db2inst1@connections ~]$ db2start
08/20/2014 22:21:20 0 0 SQL5043N Support for one or more communications protocols specified in the DB2COMM environment variable failed to start successfully. However, core database manager functionality started successfully.
SQL1063N DB2START processing was successful.

[db2inst1@connections ~]$ db2 get dbm cfg

这里重点看SVCENAME属性,修改命令：db2 update dbm cfg using SVCENAME 50000

[db2inst1@connections ~]$ db2 update dbm cfg using SVCENAME 50000
DB20000I The UPDATE DATABASE MANAGER CONFIGURATION command completed
successfully.

[db2inst1@connections ~]$ db2stop
2014-08-20 22:22:07 0 0 SQL1064N DB2STOP processing was successful.
SQL1064N DB2STOP processing was successful.
启动成功

[db2inst1@connections ~]$ db2start
08/20/2014 22:22:11 0 0 SQL1063N DB2START processing was successful.
SQL1063N DB2START processing was successful.

[db2inst1@connections ~]$ db2 get dbm cfg | grep SVC

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