springboot整合mybatis、springboot整合web、及jdbc依赖是否必要？
目录
-
- 1. Spring Boot 整合数据源
-
- 1.1 使用默认HikariCP
-
- 1.1.1 添加依赖
- 1.1.2 连接池简易配置
- 1.1.3 单元测试
- 1.2 整合Druid连接池
-
- 1.2.1 添加druid启动依赖
- 1.2.2 配置数据源
- 1.2.3 单元测试
- 2. Spring Boot 整合ORM框架
-
- 2.1 整合mybatis框架
-
- 2.1.1 添加mybatis启动依赖
- 2.1.2 配置mybatis框架并测试
- 2.1.3 基本业务实现及单元测试
- 2.1.4 拓展业务实现及单元测试
- 2.2 整合mybatis框架进阶
-
- 2.2.1 日志进阶配置
- 3. Spring Boot 整合Web资源
-
- 3.1 添加项目依赖
- 3.2 项目业务编写测试
- 3.3 启动并测试
- 4. JDBC依赖必须要？
-
- 4.1 一个web项目所需要的的依赖如下
- 4.2 测试一：不添加依赖
-
- 4.2.1分析：核心依赖、测试依赖
- 4.3 测试二：只添加web依赖
-
- 4.3.1 分析：web依赖包含核心依赖
- 4.4 测试三：只添加mybatis依赖
-
- 4.4.1 分析：mybatis依赖包含核心依赖、jdbc依赖
- 4.5 测试四：只添加mysql驱动依赖
- 4.6 测试五：只添加mysql、mybatis、web依赖
-
- 4.6.1分析：web依赖包含核心依赖；mybatis依赖包含jdb依赖
1. Spring Boot 整合数据源
1.1 使用默认HikariCP
1.1.1 添加依赖
- 添加mysql数据库驱动依赖 — MySQL Drive
<dependency>
<groupId>mysqlgroupId>
<artifactId>mysql-connector-javaartifactId>
<scope>runtimescope>
dependency>
- spring对象jdbc支持（可不要）— JDBC API
<dependency>
<groupId>org.springframework.bootgroupId>
<artifactId>spring-boot-starter-jdbcartifactId>
dependency>
1.1.2 连接池简易配置
打开application.properties配置文件，添加如下内容
spring.datasource.url=jdbc:mysql:///jtsys?useSSL=false&serverTimezone=GMT%2B8
spring.datasource.username=root
spring.datasource.password=root
1.1.3 单元测试
@RunWith(SpringRunner.class)
@SpringBootTest
public class CgbSbootApplicationTests {
@Autowired
private DataSource dataSource;
@Test
public void testDataSource() throws Exception{
System.out.println(dataSource.getConnection());
}
}
1.2 整合Druid连接池
1.2.1 添加druid启动依赖
<dependency>
<groupId>com.alibabagroupId>
<artifactId>druid-spring-boot-starterartifactId>
<version>1.1.13version>
dependency>
1.2.2 配置数据源
打开application.properties配置文件，修改连接池内容配置。
spring.datasource.type=com.alibaba.druid.pool.DruidDataSource
spring.datasource.url=jdbc:mysql:///jtsys?useUnicode=true&characterEncoding=utf-8&serverTimezone=GMT
spring.datasource.username=root
spring.datasource.password=root
spring.datasource.driver-class-name=com.mysql.cj.jdbc.Driver
简化写法
spring.datasource.url=jdbc:mysql:///jtsys?useUnicode=true&characterEncoding=utf-8&serverTimezone=GMT
spring.datasource.username=root
spring.datasource.password=root
1.2.3 单元测试
@RunWith(SpringRunner.class)
@SpringBootTest
public class CgbSbootApplicationTests {
@Autowired
private DataSource dataSource;
@Test
public void testDataSource() throws Exception{
System.out.println(dataSource.getConnection());
}
}
问题：以上为单数据源整合实现，多数据源整合实现？
2. Spring Boot 整合ORM框架
2.1 整合mybatis框架
2.1.1 添加mybatis启动依赖
参考官网： http://mybatis.org/spring/
添加mybatis依赖 — MyBatis Framework
<dependency>
<groupId>org.mybatis.spring.bootgroupId>
<artifactId>mybatis-spring-boot-starterartifactId>
<version>2.1.4version>
dependency>
2.1.2 配置mybatis框架并测试
在mybatis的配置文件application.properties文件中添加如下内容‘
mybatis.configuration.default-statement-timeout=30
mybatis.configuration.map-underscore-to-camel-case=true
2.1.3 基本业务实现及单元测试
定义业务接口
package com.cy.pj.dao;
import org.apache.ibatis.annotations.Delete;
import org.apache.ibatis.annotations.Mapper;
@Mapper //3.4
public interface SysLogDao {
@Delete("delete from sys_logs where id=#{id}")
int deleteObject(Integer id);
}
定义测试类
@RunWith(SpringRunner.class)
@SpringBootTest
public class SysLogDaoTests {
@Autowired
private SysLogDao sysLogDao;
@Test
public void testSysLogDao() {
int rows=sysLogDao.deleteObject(10);
System.out.println("rows="+rows);
}
}
2.1.4 拓展业务实现及单元测试
- 在SysLogDao中定义添加如下方法:
int deleteObjects(
@Param("ids")Integer... ids);
说明:当接口方法对应的映射语句相对比较复杂时,建议将映射语句写到对应映射文件
- 在src/main/resources目录下创建mapper/sys目录,然后在其目录添加
SysLogMapper.xml,并添加如下内容:
<mapper namespace="com.cy.pj.sys.dao.SysLogDao">
<delete id="deleteObjects">
delete from sys_logs
where id in
<foreach collection="ids"
open="("
close=")"
separator=","
item="id">
#{id}
foreach>
delete>
mapper>
- 在application.properties文件中添加如下配置
mybatis.mapper-locations=classpath:/mapper/sys/*.xml
- 在SysLogDaoTests类中添加如下单元测试方法进行单元测试:
@Test
public void testDeleteObjects() {
int rows=
sysLogDao.deleteObjects(17,18);
System.out.println(rows);
}
2.2 整合mybatis框架进阶
2.2.1 日志进阶配置
在spring boot整合mybatis框架时,假如希望在测试运行时输出sql信息,则需要进行日志的相关配置,例如打开application.properties文件然后添加如下日志级别配置.
logging.level.com.cy=DEBUG
说明:其中level单词后面为字节项目的包结构
3. Spring Boot 整合Web资源
3.1 添加项目依赖
添加web和actuator依赖。其中actuator在spring项目中主要负责健康检查以及一些监控功能。
<dependency>
<groupId>org.springframework.bootgroupId>
<artifactId>spring-boot-starter-webartifactId>
dependency>
3.2 项目业务编写测试
编写HelloController类并将其交给spring管理。
package com.cy.pj.sys.controller;
@Controller
public class HelloController {
@RequestMapping("doSayHello")
@ResponBody
public String doSayHello() {
return "hello spring";
}
}
}
3.3 启动并测试
打开chrome浏览器，在地址栏直接输入如下地址
http://localhost:8080/doSayHello
健康检查分析：在浏览器中输入
http://localhost:8080/actuator/health
假如希望查看更多actuator选项，可以在spring boot中配置文件application.properties中添加如下语句:
management.endpoints.web.exposure.include=*
此时在浏览器地址栏可以输入http://localhost:8080/actuator/beans 查看所有的spring 容器中的bean信息
4. JDBC依赖必须要？
总结：无论springboot整合mybatis框架，还是springboot整合web资源，都不用添加jdbc依赖。
下面做测试：
4.1 一个web项目所需要的的依赖如下
添加依赖
<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 https://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0modelVersion>
<parent>
<groupId>org.springframework.bootgroupId>
<artifactId>spring-boot-starter-parentartifactId>
<version>2.4.1version>
<relativePath/>
parent>
<groupId>com.jtgroupId>
<artifactId>mybatis02artifactId>
<version>0.0.1-SNAPSHOTversion>
<name>mybatis02name>
<description>Demo project for Spring Bootdescription>
<properties>
<java.version>1.8java.version>
properties>
<dependencies>
<dependency>
<groupId>org.springframework.bootgroupId>
<artifactId>spring-boot-starter-jdbcartifactId>
dependency>
<dependency>
<groupId>org.springframework.bootgroupId>
<artifactId>spring-boot-starter-webartifactId>
dependency>
<dependency>
<groupId>org.mybatis.spring.bootgroupId>
<artifactId>mybatis-spring-boot-starterartifactId>
<version>2.1.4version>
dependency>
<dependency>
<groupId>org.springframework.bootgroupId>
<artifactId>spring-boot-devtoolsartifactId>
<scope>runtimescope>
<optional>trueoptional>
dependency>
<dependency>
<groupId>mysqlgroupId>
<artifactId>mysql-connector-javaartifactId>
<scope>runtimescope>
dependency>
<dependency>
<groupId>org.projectlombokgroupId>
<artifactId>lombokartifactId>
<optional>trueoptional>
dependency>
<dependency>
<groupId>org.springframework.bootgroupId>
<artifactId>spring-boot-starter-testartifactId>
<scope>testscope>
dependency>
dependencies>
<build>
<plugins>
<plugin>
<groupId>org.springframework.bootgroupId>
<artifactId>spring-boot-maven-pluginartifactId>
<configuration>
<excludes>
<exclude>
<groupId>org.projectlombokgroupId>
<artifactId>lombokartifactId>
exclude>
excludes>
configuration>
plugin>
plugins>
build>
project>
4.2 测试一：不添加依赖
pom.xml
<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 https://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0modelVersion>
<parent>
<groupId>org.springframework.bootgroupId>
<artifactId>spring-boot-starter-parentartifactId>
<version>2.4.1version>
<relativePath/>
parent>
<groupId>com.jtgroupId>
<artifactId>mybatis08nullartifactId>
<version>0.0.1-SNAPSHOTversion>
<name>mybatis08nullname>
<description>Demo project for Spring Bootdescription>
<properties>
<java.version>1.8java.version>
properties>
<dependencies>
<dependency>
<groupId>org.springframework.bootgroupId>
<artifactId>spring-boot-starterartifactId>
dependency>
<dependency>
<groupId>org.springframework.bootgroupId>
<artifactId>spring-boot-starter-testartifactId>
<scope>testscope>
dependency>
dependencies>
<build>
<plugins>
<plugin>
<groupId>org.springframework.bootgroupId>
<artifactId>spring-boot-maven-pluginartifactId>
plugin>
plugins>
build>
project>
4.2.1分析：核心依赖、测试依赖
spring-boot-starter //核心依赖、
spring-boot-starter-test //测试依赖
4.3 测试二：只添加web依赖
<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 https://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0modelVersion>
<parent>
<groupId>org.springframework.bootgroupId>
<artifactId>spring-boot-starter-parentartifactId>
<version>2.4.1version>
<relativePath/>
parent>
<groupId>com.jtgroupId>
<artifactId>mybatis09webartifactId>
<version>0.0.1-SNAPSHOTversion>
<name>mybatis09webname>
<description>Demo project for Spring Bootdescription>
<properties>
<java.version>1.8java.version>
properties>
<dependencies>
<dependency>
<groupId>org.springframework.bootgroupId>
<artifactId>spring-boot-starter-webartifactId>
dependency>
<dependency>
<groupId>org.springframework.bootgroupId>
<artifactId>spring-boot-starter-testartifactId>
<scope>testscope>
dependency>
dependencies>
<build>
<plugins>
<plugin>
<groupId>org.springframework.bootgroupId>
<artifactId>spring-boot-maven-pluginartifactId>
plugin>
plugins>
build>
project>
4.3.1 分析：web依赖包含核心依赖
web依赖：spring-boot-starter-web
内部关联
spring-boot-starter
4.4 测试三：只添加mybatis依赖
<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 https://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0modelVersion>
<parent>
<groupId>org.springframework.bootgroupId>
<artifactId>spring-boot-starter-parentartifactId>
<version>2.4.1version>
<relativePath/>
parent>
<groupId>com.jtgroupId>
<artifactId>mybatis07mybatisartifactId>
<version>0.0.1-SNAPSHOTversion>
<name>mybatis07mybatisname>
<description>Demo project for Spring Bootdescription>
<properties>
<java.version>1.8java.version>
properties>
<dependencies>
<dependency>
<groupId>org.mybatis.spring.bootgroupId>
<artifactId>mybatis-spring-boot-starterartifactId>
<version>2.1.4version>
dependency>
<dependency>
<groupId>org.springframework.bootgroupId>
<artifactId>spring-boot-starter-testartifactId>
<scope>testscope>
dependency>
dependencies>
<build>
<plugins>
<plugin>
<groupId>org.springframework.bootgroupId>
<artifactId>spring-boot-maven-pluginartifactId>
plugin>
plugins>
build>
project>
4.4.1 分析：mybatis依赖包含核心依赖、jdbc依赖
mybatis依赖：mybatis-spring-boot-starter
- 内部关联
spring-boot-starter - 内部关联
spring-boot-starter-jdbc
4.5 测试四：只添加mysql驱动依赖
<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 https://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0modelVersion>
<parent>
<groupId>org.springframework.bootgroupId>
<artifactId>spring-boot-starter-parentartifactId>
<version>2.4.1version>
<relativePath/>
parent>
<groupId>com.jtgroupId>
<artifactId>mybatis04artifactId>
<version>0.0.1-SNAPSHOTversion>
<name>mybatis04name>
<description>Demo project for Spring Bootdescription>
<properties>
<java.version>1.8java.version>
properties>
<dependencies>
<dependency>
<groupId>org.springframework.bootgroupId>
<artifactId>spring-boot-starterartifactId>
dependency>
<dependency>
<groupId>mysqlgroupId>
<artifactId>mysql-connector-javaartifactId>
<scope>runtimescope>
dependency>
<dependency>
<groupId>org.springframework.bootgroupId>
<artifactId>spring-boot-starter-testartifactId>
<scope>testscope>
dependency>
dependencies>
<build>
<plugins>
<plugin>
<groupId>org.springframework.bootgroupId>
<artifactId>spring-boot-maven-pluginartifactId>
plugin>
plugins>
build>
project>
4.6 测试五：只添加mysql、mybatis、web依赖
<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 https://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0modelVersion>
<parent>
<groupId>org.springframework.bootgroupId>
<artifactId>spring-boot-starter-parentartifactId>
<version>2.4.1version>
<relativePath/>
parent>
<groupId>com.jtgroupId>
<artifactId>mybatis05webmybatismysqlartifactId>
<version>0.0.1-SNAPSHOTversion>
<name>mybatis05webmybatismysqlname>
<description>Demo project for Spring Bootdescription>
<properties>
<java.version>1.8java.version>
properties>
<dependencies>
<dependency>
<groupId>org.springframework.bootgroupId>
<artifactId>spring-boot-starter-webartifactId>
dependency>
<dependency>
<groupId>org.mybatis.spring.bootgroupId>
<artifactId>mybatis-spring-boot-starterartifactId>
<version>2.1.4version>
dependency>
<dependency>
<groupId>mysqlgroupId>
<artifactId>mysql-connector-javaartifactId>
<scope>runtimescope>
dependency>
<dependency>
<groupId>org.springframework.bootgroupId>
<artifactId>spring-boot-starter-testartifactId>
<scope>testscope>
dependency>
dependencies>
<build>
<plugins>
<plugin>
<groupId>org.springframework.bootgroupId>
<artifactId>spring-boot-maven-pluginartifactId>
plugin>
plugins>
build>
project>
