【Spring Boot】13.整合druid

簡介

druid和hikari是同樣的數據源鏈接池解決方案，其監控功能比較引入注目，下面把教程的內容貼一下，若是用到的話能夠參考。

1. 導入druid數據源

pom.xml

<dependency>
            <groupId>com.alibaba</groupId>
            <artifactId>druid</artifactId>
            <version>1.1.12</version>
        </dependency>

2. 設置springboot使用的數據源

server:
  port: 8086
spring:
  datasource:
    username: root
    password: 123456
    url: jdbc:mysql://10.21.1.47:3306/joyblack?characterEncoding=utf8&serverTimezone=GMT
    driver-class-name: com.mysql.cj.jdbc.Driver
    initialization-mode: always
    sql-script-encoding: utf-8
    schema:
      - classpath:schema.sql
    data:
      - classpath:data.sql
    type: com.alibaba.druid.pool.DruidDataSource

3. 配置druid鏈接屬性

druid支持的配置

initialSize: 5
    minIdle: 5
    maxActive: 20
    maxWait: 60000
    timeBetweenEvictionRunsMillis: 60000
    minEvictableIdleTimeMillis: 300000
    validationQuery: SELECT 1 FROM DUAL
    testWhileIdle: true
    testOnBorrow: false
    testOnReturn: false
    poolPreparedStatements: true
#   配置監控統計攔截的filters，去掉後監控界面sql沒法統計，'wall'用於防火牆  
    filters: stat,wall,log4j
    maxPoolPreparedStatementPerConnectionSize: 20
    useGlobalDataSourceStat: true  
    connectionProperties: druid.stat.mergeSql=true;druid.stat.slowSqlMillis=500

將其導入配置文件，目前配置文件以下所示:

application.yml

server:
  port: 8086
spring:
  datasource:
    username: root
    password: 123456
    url: jdbc:mysql://10.21.1.47:3306/joyblack?characterEncoding=utf8&serverTimezone=GMT
    driver-class-name: com.mysql.cj.jdbc.Driver
    initialization-mode: always
    sql-script-encoding: utf-8
    schema:
      - classpath:schema.sql
    data:
      - classpath:data.sql
    type: com.alibaba.druid.pool.DruidDataSource

    initialSize: 5
    minIdle: 5
    maxActive: 20
    maxWait: 60000
    timeBetweenEvictionRunsMillis: 60000
    minEvictableIdleTimeMillis: 300000
    validationQuery: SELECT 1 FROM DUAL
    testWhileIdle: true
    testOnBorrow: false
    testOnReturn: false
    poolPreparedStatements: true
    #   配置監控統計攔截的filters，去掉後監控界面sql沒法統計，'wall'用於防火牆
    filters: stat,wall,logback
    maxPoolPreparedStatementPerConnectionSize: 20
    useGlobalDataSourceStat: true
    connectionProperties: druid.stat.mergeSql=true;druid.stat.slowSqlMillis=500

編寫配置文件將配置注入數據源配置中以及配置數據庫監控等。

config/DruidConfig.class

package com.zhaoyi.jdbcweb.config;

import com.alibaba.druid.pool.DruidDataSource;
import com.alibaba.druid.support.http.StatViewServlet;
import com.alibaba.druid.support.http.WebStatFilter;
import org.springframework.boot.context.properties.ConfigurationProperties;
import org.springframework.boot.web.servlet.FilterRegistrationBean;
import org.springframework.boot.web.servlet.ServletRegistrationBean;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;

import javax.sql.DataSource;
import java.util.Arrays;
import java.util.HashMap;
import java.util.Map;

@Configuration
public class DruidConfig {
    @ConfigurationProperties(prefix = "spring.datasource")
    @Bean
    public DataSource druid(){
        return new DruidDataSource();
    }

    // 配置Druid的監控
    //1. 配置一個管理後臺的Servlet
    @Bean
    public ServletRegistrationBean statViewServlet(){
        // 配置監控訪問路徑
        ServletRegistrationBean bean = new ServletRegistrationBean(new StatViewServlet(), "/druid/*");
        Map<String,String> initParams = new HashMap<>();

        // 設置監控數據庫信息
        initParams.put("loginUsername","user");
        initParams.put("loginPassword","123456");
        //默認容許全部訪問
        initParams.put("allow","");
        // 也能夠配置禁止訪問
        // initParams.put("deny","192.168.102.200");
        bean.setInitParameters(initParams);
        return bean;
    }


    //2. 配置一個web監控的filter
    @Bean
    public FilterRegistrationBean webStatFilter(){
        FilterRegistrationBean bean = new FilterRegistrationBean();
        bean.setFilter(new WebStatFilter());

        Map<String,String> initParams = new HashMap<>();
        initParams.put("exclusions","*.js,*.css,/druid/*");

        bean.setInitParameters(initParams);

        bean.setUrlPatterns(Arrays.asList("/*"));

        return  bean;
    }
}

若是運行過程當中發現有提示注入(spring.datasource)之類的錯誤，通常是配置filters: stat,wall,logback這裏所用的是logback，教程裏面logback處用的是log4j，可是咱們知道springboot默認整合的日誌門面是slf4j+logback，固然，若是您使用的是另外的組合，固然就得加入log4j的依賴了。

<dependency>
            <groupId>log4j</groupId>
            <artifactId>log4j</artifactId>
            <version>1.2.16</version>
            <scope>compile</scope>
 </dependency>

運行項目，訪問127.0.0.1:8086/druid並登陸前面配置的帳戶和密碼(user:123456)便可查看監控信息.