SpringBoot整合说明

整合说明

jetty服务器

内嵌Tomcat是SpringBoot的辅助功能之一，将Tomcat服务器作为对象运行，并将该对象交给Spring容器管理

jetty服务器：更轻量级，负载性能低

<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactedId>spring-boot-starter-web</artifactedId>
    <exclusions>
        <exclusion>
            <groupId>org.springframework.boot</groupId>
            <artifactedId>spring-boot-starter-tomcat</artifactedId>
        </exclusion>
    </exclusions>
</dependency>
<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactedId>spring-boot-starter-jetty</artifactedId>
</dependency>

SpringBoot整合Mybatis-Plus

idea创建boot项目时换一个网址：https://start.aliyun.com或maven工程导入对应依赖

<dependency>
    <groupId>com.baomidou</groupId>
    <artifactId>mybatis-plus-boot-starter</artifactId>
    <version>3.4.3</version>
</dependency>

#配置mp相关配置，指定表名开头
mybatis-plus:
	global-config:
		db-config:
			table-prefix: tb1_

SpringBoot整合Druid

druid-spring-boot-starter

# 方法1
spring:
  datasource:
    type: com.alibaba.druid.pool.DruidDataSource
    driver-class-name: com.mysql.cj.jdbc.Driver
    url: jdbc:mysql://localhost:3306/your_database
    username: your_username
    password: your_password

# 方法2（推荐）
spring:
  datasource:
    druid:
      driver-class-name: com.mysql.cj.jdbc.Driver
      url: jdbc:mysql://localhost:3306/your_database
      username: your_username
      password: your_password

配置具体含义可以参考Druid的官方文档：Druid配置属性官方文档。

spring:
  datasource:
    type: com.alibaba.druid.pool.DruidDataSource
    url: jdbc:mysql://localhost:3306/your_database
    username: your_username
    password: your_password
    driver-class-name: com.mysql.cj.jdbc.Driver
    druid:
      initial-size: 5
      min-idle: 5
      max-active: 20
      max-wait: 60000
      time-between-eviction-runs-millis: 60000
      min-evictable-idle-time-millis: 300000
      validation-query: SELECT 1
      test-while-idle: true
      test-on-borrow: false
      test-on-return: false
      pool-prepared-statements: true
      max-pool-prepared-statement-per-connection-size: 20
      filters: stat,wall,log4j
      connection-properties: druid.stat.mergeSql=true;druid.stat.slowSqlMillis=500

SpringBoot整合JUnit

<dependency>
    <groupId>org.springframewor.bootk</groupId>
    <artifactId>spring-boot-starter-test</artifactId>
    <scope>test</scope>
</dependency>

启动类就起到了配置类的作用，他会把他所在的包及子包扫描一遍；测试类会默认加载引导类，初始化spring的环境

测试类会加载同层包下的带有@SpringBootApplication里的@SpringBootConfiguration里的配置信息

如果测试类在SpringBoot启动类的包或子包中，可以省略启动类的设置，也就是省略classes的设定，如果不在一个包下就指定参数@SpringBootTest(classes = 引导类名.class)

@SpringBootTest
class test{
    @Autowired
    private A a;
    @Test
    public void save(){
        a.save();
    }
}

SpringBoot整合mybatis

SpringBoot版本低于2.4.3(不含)，Mysql驱动版本大于8.0时，需要在url连接串中配置时区或在MySQL数据库端配置时区

驱动类过时：driver-class-name: com.mysql.cj.jdbc.Driver

加个@Mapper就可以

<dependency>
    <groupId>org.mybatis.spring.boot</groupId>
    <artifactId>mybatis-spring-boot-starter</artifactId>
    <version>2.2.0</version>
</dependency>
<dependency>
    <groupId>mysql</groupId>
    <artifactId>mysql-connector-java</artifactId>
    <scope>runtime</scope>
</dependency>

spring:
  datasource:
    driver-class-name: com.mysql.cj.jdbc.Driver
    url:jdbc:mysql: //localhost:3306/ssm_db?serverTimezone=UTC
    username: root
    password: root
    type: com.alibaba.druid.pool.DruidDataSource