SpringBoot2.x 常用基本配置_springboot yml validationquery

1.maven云仓库查找dependency

• 仓库地址 https://mvnrepository.com/tags/maven

2. 配置MySQL、Druid数据源

2.1 pom.xml文件中配置MySQL依赖

<dependency>
    <groupId>mysql</groupId>
    <artifactId>mysql-connector-java</artifactId>
    <version>5.1.49</version>
</dependency>
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2.2 pom.xml配置Druid依赖

<!-- druid数据源 -->
<dependency>
    <groupId>com.alibaba</groupId>
    <artifactId>druid-spring-boot-starter</artifactId>
    <version>1.1.24</version>
</dependency>
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2.3 application.yml中配置MySQL连接和druid数据源连接池

spring:
  datasource:
    driver-class-name: com.mysql.jdbc.Driver
    url: jdbc:mysql://localhost:3306/lt_sb2?characterEncoding=utf-8&serverTimezone=GMT%2b8&useSSL=false
    username: root
    password: 123456
    platform: mysql
    type: com.alibaba.druid.pool.DruidDataSource
    druid:
      initial-size: 5  # 初始化大小，這個屬性
      min-idle: 5  # 最小
      max-active: 100  # 最大
      max-wait: 60000  # 配置获取连接等待超时的时间
      time-between-eviction-runs-millis: 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
      min-evictable-idle-time-millis: 300000  # 指定一个空闲连接最少空闲多久后可被清除，单位是毫秒
      validationQuery: select 'x'
      test-while-idle: true  # 当连接空闲时，是否执行连接测试
      test-on-borrow: false  # 当从连接池借用连接时，是否测试该连接
      test-on-return: false  # 在连接归还到连接池时是否测试该连接
      filters: config,wall,stat  # 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
      poolPreparedStatements: true # 打开PSCache，并且指定每个连接上PSCache的大小
      maxPoolPreparedStatementPerConnectionSize: 20
      maxOpenPreparedStatements: 20
      # 通过connectProperties属性来打开mergeSql功能；慢SQL记录
      connectionProperties: druid.stat.slowSqlMillis=200;druid.stat.logSlowSql=true;config.decrypt=false
      # 合并多个DruidDataSource的监控数据
      #use-global-data-source-stat: true
      #WebStatFilter配置，说明请参考Druid Wiki，配置_配置WebStatFilter
      web-stat-filter:
        enabled: true #是否启用StatFilter默认值true
        url-pattern: /*
        exclusions: /druid/*,*.js,*.gif,*.jpg,*.bmp,*.png,*.css,*.ico
        session-stat-enable: true
        session-stat-max-count: 10
      #StatViewServlet配置，说明请参考Druid Wiki，配置_StatViewServlet配置
      stat-view-servlet:
        enabled: true #是否启用StatViewServlet默认值true
        url-pattern: /druid/*
        reset-enable: true
        login-username: admin
        login-password: admin
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2.4 Druid配置类

package com.lt.config;

import com.alibaba.druid.pool.DruidDataSource;
import org.springframework.boot.context.properties.ConfigurationProperties;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;

import javax.sql.DataSource;

@Configuration
public class AppConfig {

    @Bean(name = "dataSource")
    @ConfigurationProperties(prefix = "spring.datasource")
    public DataSource druidDataSource(){
        return new DruidDataSource();
    }
}
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