<artifactId>mybatis-spring-boot-starter</artifactId>

</dependency>

<dependency>

<groupId>mysql</groupId>

<artifactId>mysql-connector-java</artifactId>

<scope>runtime</scope>

</dependency>

<dependency>

<groupId>org.springframework.boot</groupId>

<artifactId>spring-boot-starter-test</artifactId>

<scope>test</scope>

<exclusions>

<exclusion>

<groupId>org.junit.vintage</groupId>

<artifactId>junit-vintage-engine</artifactId>

</exclusion>

</exclusions>

</dependency>

<dependency>

<groupId>io.springfox</groupId>

<artifactId>springfox-swagger2</artifactId>

</dependency>

<dependency>

<groupId>io.springfox</groupId>

<artifactId>springfox-swagger-ui</artifactId>

</dependency>

<dependency>

<groupId>com.alibaba</groupId>

<artifactId>druid-spring-boot-starter</artifactId>

</dependency>

<dependency>

<groupId>junit</groupId>

<artifactId>junit</artifactId>

<scope>test</scope>

</dependency>

<dependency>

<groupId>com.google.code.gson</groupId>

<artifactId>gson</artifactId>

</dependency>

</dependencies>

<build>

<plugins>

<plugin>

<groupId>org.springframework.boot</groupId>

<artifactId>spring-boot-maven-plugin</artifactId>

</plugin>

</plugins>

</build>

</project>

5. 新建 mybatis-config.xml：

<!DOCTYPE configuration

PUBLIC "-//mybatis.org//DTD Config 3.0//EN"

"http://mybatis.org/dtd/mybatis-3-config.dtd">

<configuration>

<typeAliases>

<package name="com.bolingcavalry.druidonesource.entity"/>

</typeAliases>

</configuration>

6. 配置 application.yml，请重点关注 druid 的配置，还请注意 stat-view-servlet，这里是 druid 监控页面的登录配置：

server:

port: 8080

spring:

#1.JDBC 数据源

datasource:

username: root

password: 123456

url: jdbc:mysql://192.168.50.43:3306/mybatis?useUnicode=true&characterEncoding=utf-8&useSSL=true&serverTimezone=UTC

driver-class-name: com.mysql.cj.jdbc.Driver

#2.连接池配置

druid:

#初始化连接池的连接数量 大小，最小，最大

initial-size: 5

min-idle: 5

max-active: 20

#配置获取连接等待超时的时间

max-wait: 60000

#配置间隔多久才进行一次检测，检测需要关闭的空闲连接，单位是毫秒

time-between-eviction-runs-millis: 60000

配置一个连接在池中最小生存的时间，单位是毫秒

min-evictable-idle-time-millis: 30000

配置一个连接在池中最大生存的时间，单位是毫秒

max-evictable-idle-time-millis: 300000

validation-query: SELECT 1 FROM user

test-while-idle: true

test-on-borrow: true

test-on-return: false

是否缓存 preparedStatement，也就是 PSCache 官方建议 MySQL 下建议关闭 个人建议如果想用 SQL 防火墙 建议打开

pool-prepared-statements: true

max-pool-prepared-statement-per-connection-size: 20

配置监控统计拦截的 filters，去掉后监控界面 sql 无法统计，'wall'用于防火墙

filters: stat,wall,slf4j

filter:

stat:

merge-sql: true

slow-sql-millis: 5000

#3.基础监控配置

web-stat-filter:

enabled: true

url-pattern: /*

#设置不统计哪些 URL

exclusions: ".js,.gif,.jpg,.png,.css,.ico,/druid/*"

session-stat-enable: true

session-stat-max-count: 100

stat-view-servlet:

enabled: true

url-pattern: /druid/*

reset-enable: true

#设置监控页面的登录名和密码

login-username: admin

login-password: admin

allow: 127.0.0.1

#deny: 192.168.1.100

mybatis 配置

mybatis:

配置文件所在位置

config-location: classpath:mybatis-config.xml

映射文件所在位置

mapper-locations: classpath:mappers/*Mapper.xml

日志配置

logging:

level:

root: INFO

com:

bolingcavalry:

druidonesource:

mapper: debug

7. 创建启动类，要带上 MapperScan 注解：

package com.bolingcavalry.druidonesource;

import org.mybatis.spring.annotation.MapperScan;

import org.springframework.boot.SpringApplication;

import org.springframework.boot.autoconfigure.SpringBootApplication;

@SpringBootApplication

@MapperScan("com.bolingcavalry.druidonesource.mapper")

public class DuridOneSourceApplication {

public static void main(String[] args) {

SpringApplication.run(DuridOneSourceApplication.class, args);

}

}

8. 创建 swagger 配置类：

package com.bolingcavalry.druidonesource;

import springfox.documentation.service.Contact;

import org.springframework.context.annotation.Bean;

import org.springframework.context.annotation.Configuration;

import springfox.documentation.builders.ApiInfoBuilder;

import springfox.documentation.builders.PathSelectors;

import springfox.documentation.builders.RequestHandlerSelectors;

import springfox.documentation.service.ApiInfo;

import springfox.documentation.service.Tag;

import springfox.documentation.spi.DocumentationType;

import spri

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ngfox.documentation.spring.web.plugins.Docket;

import springfox.documentation.swagger2.annotations.EnableSwagger2;

/**

• @Description: swagger 配置类

• @author: willzhao E-mail: zq2599@gmail.com

• @date: 2020/8/11 7:54

*/

@Configuration

@EnableSwagger2

public class SwaggerConfig {

@Bean

public Docket createRestApi() {

return new Docket(DocumentationType.SWAGGER_2)

.apiInfo(apiInfo())

.tags(new Tag("UserController", "用户服务"), new Tag("LogController", "日志服务"))

.select()

// 当前包路径

.apis(RequestHandlerSelectors.basePackage("com.bolingcavalry.druidonesource.controller"))

.paths(PathSelectors.any())

.build();

}

//构建 api 文档的详细信息函数,注意这里的注解引用的是哪个

private ApiInfo apiInfo() {

return new ApiInfoBuilder()

//页面标题

.title("MyBatis CURD 操作")

//创建人

.contact(new Contact("程序员欣宸", "https://github.com/zq2599/blog_demos", "zq2599@gmail.com"))

//版本号

.version("1.0")

//描述

.description("API 描述")

.build();

}

}

9. 创建 druid 配置类，如下，可见是通过使用 application.yml 中配置的参数对 DruidDataSource 进行配置：

package com.bolingcavalry.druidonesource;

import com.alibaba.druid.pool.DruidDataSource;

import com.alibaba.druid.support.http.StatViewServlet;

import org.slf4j.Logger;

import org.slf4j.LoggerFactory;

import org.springframework.beans.factory.annotation.Value;

import org.springframework.boot.web.servlet.ServletRegistrationBean;

import org.springframework.context.annotation.Bean;

import org.springframework.context.annotation.Configuration;

/**

• @Description: druid 配置类

• @author: willzhao E-mail: zq2599@gmail.com

• @date: 2020/8/18 08:12

*/

@Configuration

public class DruidConfig {

private static final Logger logger = LoggerFactory.getLogger(DruidConfig.class);

@Value("${spring.datasource.url}")

private String dbUrl;

@Value("${spring.datasource.username}")

private String username;

@Value("${spring.datasource.password}")

private String password;

@Value("${spring.datasource.driver-class-name}")

private String driverClassName;

@Value("${spring.datasource.druid.initial-size}")

private int initialSize;

@Value("${spring.datasource.druid.max-active}")

private int maxActive;

@Value("${spring.datasource.druid.min-idle}")

private int minIdle;

@Value("${spring.datasource.druid.max-wait}")

private int maxWait;

@Value("${spring.datasource.druid.pool-prepared-statements}")

private boolean poolPreparedStatements;

@Value("${spring.datasource.druid.max-pool-prepared-statement-per-connection-size}")

private int maxPoolPreparedStatementPerConnectionSize;

@Value("${spring.datasource.druid.time-between-eviction-runs-millis}")

private int timeBetweenEvictionRunsMillis;

@Value("${spring.datasource.druid.min-evictable-idle-time-millis}")

private int minEvictableIdleTimeMillis;

@Value("${spring.datasource.druid.max-evictable-idle-time-millis}")

private int maxEvictableIdleTimeMillis;

@Value("${spring.datasource.druid.validation-query}")

private String validationQuery;

@Value("${spring.datasource.druid.test-while-idle}")

private boolean testWhileIdle;

@Value("${spring.datasource.druid.test-on-borrow}")

private boolean testOnBorrow;

@Value("${spring.datasource.druid.test-on-return}")

private boolean testOnReturn;

@Value("${spring.datasource.druid.filters}")

private String filters;

@Value("{spring.datasource.druid.connection-properties}")

private String connectionProperties;

/**