Spring Boot (3) - 集成 mybatis,junit, spring data jpa

1 springboot 集成 mybatis

1.1 添加Mybatis的起步依賴

<!--mybatis起步依賴-->
        <dependency>
            <groupId>org.mybatis.spring.boot</groupId>
            <artifactId>mybatis-spring-boot-starter</artifactId>
            <version>1.1.1</version>
        </dependency>

1.2 添加數據庫驅動座標

<!-- MySQL連接驅動 -->
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
        </dependency>

1.3 添加數據庫連接信息

#DB Configuration:
spring.datasource.driverClassName=com.mysql.jdbc.Driver
spring.datasource.url=jdbc:mysql://localhost:3306/test?useUnicode=true&characterEncoding=utf8
spring.datasource.username=root
spring.datasource.password=root

1.3.1 建立表

DROP TABLE IF EXISTS `user`;
CREATE TABLE `user` (
`id` int(11) NOT NULL AUTO_INCREMENT,
`username` varchar(50) DEFAULT NULL,
`password` varchar(50) DEFAULT NULL,
`name` varchar(50) DEFAULT NULL,
PRIMARY KEY (`id`)
) ENGINE=InnoDB AUTO_INCREMENT=10 DEFAULT CHARSET=utf8;
-- ----------------------------
-- Records of user
-- ----------------------------
INSERT INTO `user` VALUES ('1', 'zhangsan', '123', '張三');
INSERT INTO `user` VALUES ('2', 'lisi', '123', '李四');

1.4 創建實體Bean

1.5 編寫Mapper

注意：@Mapper標記該類是一個mybatis的mapper接口，可以被spring boot自動掃描到spring上下文中

package com.tzb.mapper;

import com.tzb.domain.User;
import org.apache.ibatis.annotations.Mapper;

import java.util.List;

@Mapper
public interface UserMapper {
    public List<User> queryUserList();
}

---

1.5.1 配置Mapper映射文件

<?xml version="1.0" encoding="utf-8" ?>
<!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN"
        "http://mybatis.org/dtd/mybatis-3-mapper.dtd" >
<mapper namespace="com.tzb.mapper.UserMapper">

    <select id="queryUserList" resultType="user">
        select * from user
    </select>

</mapper>

1.6 在application.properties中添加mybatis的信息

#spring集成Mybatis環境
#pojo別名掃描包
mybatis.type-aliases-package=com.itheima.domain
#加載Mybatis映射文件
mybatis.mapper-locations=classpath:mapper/*Mapper.xml

1.7 測試Controller

@Controller
public class MybatisController {

    @Autowired
    private UserMapper userMapper;

    @RequestMapping("/user")
    @ResponseBody
    public List<User> queryUserList(){
        List<User> users = userMapper.queryUserList();
        return users;
    }
}

2 springboot 集成 junit

2.1 添加Junit的起步依賴

<!--測試的起步依賴-->
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
</dependency>

2.2 測試類

package com.tzb;


import com.tzb.domain.User;
import com.tzb.mapper.UserMapper;
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.test.context.junit4.SpringRunner;

import java.util.List;

@RunWith(SpringRunner.class)
@SpringBootTest(classes = SpringbootQuick2Application.class )
public class MyBatisTest {

    @Autowired
    private UserMapper userMapper;

    @Test
    public void test(){
        List<User> users = userMapper.queryUserList();
        System.out.println(users);
    }
}

3 SpringBoot整合Spring Data JPA

3.1 添加Spring Data JPA的起步依賴

<!-- springBoot JPA的起步依賴 -->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-data-jpa</artifactId>
        </dependency>

3.2 添加數據庫驅動依賴

<!-- MySQL連接驅動 -->
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
        </dependency>

3.3 在application.properties中配置數據庫和jpa的相關屬性

#DB Configuration:
spring.datasource.driverClassName=com.mysql.jdbc.Driver
spring.datasource.url=jdbc:mysql://localhost:3306/test?serverTimezone=UTC&useUnicode=true&characterEncoding=utf8
spring.datasource.username=root
spring.datasource.password=root

#JPA Configuration:
spring.jpa.database=MySQL
spring.jpa.show-sql=true
spring.jpa.generate-ddl=true
spring.jpa.hibernate.ddl-auto=update
spring.jpa.hibernate.naming_strategy=org.hibernate.cfg.ImprovedNamingStrategy

3.4 創建實體配置實體

3.5 編寫UserRepository

package com.tzb.repository;

import com.tzb.domain.User;
import org.springframework.data.jpa.repository.JpaRepository;

import java.util.List;

/**
 * 第二個泛型代表 id
 */
public interface UserRepository extends JpaRepository<User,Integer> {

    @Override
    List<User> findAll();
}

3.6 測試類

@RunWith(SpringRunner.class)
@SpringBootTest(classes = SpringbootQuick2Application.class)
public class JpaTest {

    @Autowired
    private UserRepository userRepository;

    @Test
    public void test(){
        List<User> users = userRepository.findAll();
        System.out.println(users);
    }

}