开发常用配置

数据库连接

pom

<!--jdbc-->
<dependency>
    <groupId>mysql</groupId>
    <artifactId>mysql-connector-java</artifactId>
    <scope>runtime</scope>
</dependency>

<!--druid-->
<dependency>
    <groupId>com.alibaba</groupId>
    <artifactId>druid-spring-boot-starter</artifactId>
    <version>1.1.24</version>
</dependency>

<!--mybatis-->
<dependency>
    <groupId>org.mybatis.spring.boot</groupId>
    <artifactId>mybatis-spring-boot-starter</artifactId>
    <version>2.1.1</version>
</dependency>

<!--mybatis-plus-->
<dependency>
    <groupId>com.baomidou</groupId>
    <artifactId>mybatis-plus-boot-starter</artifactId>
    <version>3.0.5</version>
</dependency>

<!--lombok-->
<dependency>
    <groupId>org.projectlombok</groupId>
    <artifactId>lombok</artifactId>
    <optional>true</optional>
</dependency>

配置文件

spring:
  datasource:
    druid:
#   数据源基本配置
    username: root
    password: root
    driver-class-name: com.mysql.cj.jdbc.Driver
    url: jdbc:mysql://localhost:3306/xxx?
     useUnicode=true&useSSL=false&characterEncoding=utf8&serverTimezone=Asia/Shanghai
    type: com.alibaba.druid.pool.DruidDataSource
# 连接池配置
    druid:
      # 初始化大小，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，单位毫秒
      time-between-eviction-runs-millis: 60000
      # 配置一个连接在池中最小生存时间
      min-evictable-idle-time-millis: 300000
      validation-query: SELECT 1 FROM sys_user
      test-while-idle: true
      test-on-borrow: false
      test-on-return: false
      # 打开 PSCache，并且指定每个连接上 PSCache 的大小
      pool-prepared-statements: true
      max-pool-prepared-statement-per-connection-size: 20
      # 配置监控统计拦截的 Filter，去掉后监控界面 SQL 无法统计，wall 用于防火墙
      filters: stat,wall,log4j
      # 通过 connection-properties 属性打开 mergeSql 功能；慢 SQL 记录
      connection-properties: druid.stat.mergeSql\=true;druid.stat.slowSqlMillis\=5000
      # 配置 DruidStatFilter
      web-stat-filter:
        enabled: true
        url-pattern: /*
        exclusions: .js,*.gif,*.jpg,*.bmp,*.png,*.css,*.ico,/druid/*
      # 配置 DruidStatViewServlet
      stat-view-servlet:
        url-pattern: /druid/*
        # IP 白名单，没有配置或者为空，则允许所有访问
        allow: 127.0.0.1
        # IP 黑名单，若白名单也存在，则优先使用
        deny: 192.168.31.253
        # 禁用 HTML 中 Reset All 按钮
        reset-enable: false
        # 登录用户名/密码
        login-username: root
        login-password: 123

mybatis配置mapper.xml

<?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="cn.xxx.mapper.xxxMapper">
    
    <!--结果集映射-->
    <resultMap id="BASE_RESULTMAP" type="User">
        <id column="" property=""></id>
        <result column="" property=""></result>
    </resultMap>
    
    <!--crud-->
    <insert id="" ></insert>

</mapper>