Druid数据库监控

（3）application.properties配置

application:
name: sping-data-monitor   # 暴露微服务名称
#数据库配置
# 驱动配置信息
spring.datasource.type=com.alibaba.druid.pool.DruidDataSource
spring.datasource.url=jdbc:mysql://localhost:3306/test?useUnicode=true&characterEncoding=UTF-8&useSSL=false&zeroDateTimeBehavior=convertToNull
spring.datasource.username=root
spring.datasource.password=root
spring.datasource.driver-class-name=com.mysql.jdbc.Driver
 
# 连接池的配置信息
# 初始化大小，最小，最大
spring.datasource.initialSize=3
spring.datasource.minIdle=5
spring.datasource.maxActive=20
 
# 配置获取连接等待超时的时间
spring.datasource.maxWait=30000
# 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
spring.datasource.timeBetweenEvictionRunsMillis=60000
 
# 配置一个连接在池中最小生存的时间，单位是毫秒
spring.datasource.minEvictableIdleTimeMillis=300000
spring.datasource.validationQuery=SELECT 1 FROM DUAL
spring.datasource.testWhileIdle=true
spring.datasource.testOnBorrow=false
spring.datasource.testOnReturn=false
 
# 打开PSCache，并且指定每个连接上PSCache的大小
spring.datasource.poolPreparedStatements=true
spring.datasource.maxPoolPreparedStatementPerConnectionSize=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
spring.datasource.filters=stat,wall
# 通过connectProperties属性来打开mergeSql功能；慢SQL记录
spring.datasource.connectionProperties=druid.stat.mergeSql=true;druid.stat.slowSqlMillis=10000
 

（4）DruidDBConfig

package com.zzq.config;
 
import com.alibaba.druid.pool.DruidDataSource;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.context.annotation.Primary;
 
import javax.sql.DataSource;
import java.sql.SQLException;
 
 
@Configuration
public class DruidDBConfig {
 
    private Logger logger = LoggerFactory.getLogger(DruidDBConfig.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.initialSize}")
    private int initialSize;
 
    @Value("${spring.datasource.minIdle}")
    private int minIdle;
 
    @Value("${spring.datasource.maxActive}")
    private int maxActive;
 
    @Value("${spring.datasource.maxWait}")
    private int maxWait;
 
    @Value("${spring.datasource.timeBetweenEvictionRunsMillis}")
    private int timeBetweenEvictionRunsMillis;
 
    @Value("${spring.datasource.minEvictableIdleTimeMillis}")
    private int minEvictableIdleTimeMillis;
 
    @Value("${spring.datasource.validationQuery}")
    private String validationQuery;
 
    @Value("${spring.datasource.testWhileIdle}")
    private boolean testWhileIdle;
 
    @Value("${spring.datasource.testOnBorrow}")
    private boolean testOnBorrow;
 
    @Value("${spring.datasource.testOnReturn}")
    private boolean testOnReturn;
 
    @Value("${spring.datasource.poolPreparedStatements}")
    private boolean poolPreparedStatements;
 
    @Value("${spring.datasource.maxPoolPreparedStatementPerConnectionSize}")
    private int maxPoolPreparedStatementPerConnectionSize;
 
    @Value("${spring.datasource.filters}")
    private String filters;
 
    @Value("{spring.datasource.connectionProperties}")
    private String connectionProperties;
 
    /**
     * @Bean 声明，DataSource 对象为 Spring 容器所管理;
     * @Primary 表示这里定义的DataSource将覆盖其他来源的DataSource。
     * StatFilter，用于统计监控信息。StatFilter的别名是stat。
     * 统计SQL信息，合并统计。mergeStat是的MergeStatFilter缩写。
     *     通过 DataSource 的属性<property name="filters" value="mergeStat" /> 或者
     *                          connectProperties属性来打开mergeSql功能 <property name="connectionProperties" value="druid.stat.mergeSql=true" />
     * StatFilter属性slowSqlMillis用来配置SQL慢的标准
     *
     * @return
     */
    @Bean
    @Primary
    public DataSource dataSource() {
        DruidDataSource datasource = new DruidDataSource();
        datasource.setUrl(dbUrl);
        datasource.setDriverClassName(driverClassName);
        datasource.setUsername(username);
        datasource.setPassword(password);
 
        //configuration
        datasource.setInitialSize(initialSize);
        datasource.setMinIdle(minIdle);
        datasource.setMaxActive(maxActive);
        datasource.setMaxWait(maxWait);
        datasource.setTimeBetweenEvictionRunsMillis(timeBetweenEvictionRunsMillis);
        datasource.setMinEvictableIdleTimeMillis(minEvictableIdleTimeMillis);
        datasource.setValidationQuery(validationQuery);
        datasource.setTestWhileIdle(testWhileIdle);
        datasource.setTestOnBorrow(testOnBorrow);
        datasource.setTestOnReturn(testOnReturn);
        datasource.setPoolPreparedStatements(poolPreparedStatements);
        datasource.setMaxPoolPreparedStatementPerConnectionSize(maxPoolPreparedStatementPerConnectionSize);
        try {
            /**
             * 设置StatFilter，用于统计监控信息。
             * StatFilter的别名是stat
             *
             */
            datasource.setFilters(filters);
        } catch (SQLException e) {
            logger.error("druid configuration initialization filter : {0}",e);
        }
        datasource.setConnectionProperties(connectionProperties);
 
        return datasource;
    }
 
}

（5）DruidStatFilter

package com.zzq.filter;
 
import com.alibaba.druid.support.http.WebStatFilter;
 
import javax.servlet.annotation.WebFilter;
import javax.servlet.annotation.WebInitParam;
 
/**
 * WebStatFilter用于采集web-jdbc关联监控的数据。
 * 属性filterName声明过滤器的名称,可选
 * 属性urlPatterns指定要过滤 的URL模式,也可使用属性value来声明.(指定要过滤的URL模式是必选属性)
 */
 
@WebFilter(
        urlPatterns = "/sping-data-monitor/*",
        initParams = {
                @WebInitParam(name = "exclusions",value = "*.js,*.gif,*.jpg,*.png,*.css,*.ico,/druid/*")
        }
)
public class DruidStatFilter extends WebStatFilter {
}

（6）DruidStatViewServlet

package com.zzq.servlet;
 
import com.alibaba.druid.support.http.StatViewServlet;
 
import javax.servlet.annotation.WebInitParam;
import javax.servlet.annotation.WebServlet;
 
/**
 * StatViewServlet用于展示Druid的统计信息。
 * 提供监控信息展示的html页面
 * 提供监控信息的JSON API
 *
 * 内置监控页面的首页是/druid/index.html
 *
 */
 
/**
 * @Webservlet
 * 有两个属性可以用来表示Servlet的访问路径，分别是value和urlPatterns。value和urlPatterns都是数组形式，
 * 表示我们可以把一个Servlet映射到多个访问路径，但是value和urlPatterns不能同时使用。
 *
 */
@WebServlet(
        urlPatterns = {"/druid/*"},//#监控地址,默认 /druid/*
        initParams = {
                @WebInitParam(name = "loginUsername", value = "admin"),//#登录用户名
                @WebInitParam(name = "loginPassword", value = "admin"),//#登录密码
                @WebInitParam(name = "resetEnable", value = "false"),
//      @WebInitParam(name = "allow", value = "127.0.0.1") #IP 白名单
    }
)
public class DruidStatViewServlet extends StatViewServlet {
}

（7）启动类

package com.zzq;
 
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.boot.web.servlet.ServletComponentScan;
 
@SpringBootApplication
@ServletComponentScan(basePackages = {"com.zzq.**.servlet"})
public class SpingDataMonitorApplication {
 
    public static void main(String[] args) {
        SpringApplication.run(SpingDataMonitorApplication.class, args);
    }
 
}

（8）效果

http://localhost:8080/druid/login.html

用户名/密码   admin/admin

Druid数据库监控

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