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  • springboot项目中实现访问druid内置监控页面

    1、首先加入druid依赖

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    <dependency>
        <groupId>com.alibaba</groupId>
        <artifactId>druid-spring-boot-starter</artifactId>
        <version>1.1.9</version>
    </dependency>

    2、设置配置文件：

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    # 数据库访问配置
    # 主数据源，默认的
    spring.datasource.type=com.alibaba.druid.pool.DruidDataSource
    spring.datasource.driver-class-name=com.mysql.jdbc.Driver
    spring.datasource.url=jdbc:mysql://localhost:3306/test
    spring.datasource.username=root
    spring.datasource.password=123456
      
    # 下面为连接池的补充设置，应用到上面所有数据源中
    # 初始化大小，最小，最大
    spring.datasource.initialSize=5
    spring.datasource.minIdle=5
    spring.datasource.maxActive=20
    # 配置获取连接等待超时的时间
    spring.datasource.maxWait=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
    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,log4j
    # 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=5000
    # 合并多个DruidDataSource的监控数据
    #spring.datasource.useGlobalDataSourceStat=true

    3、启动项目后

    访问页面http://127.0.0.1:8001/druid/sql.html，就可以访问监控页面了，其中ip和端口号为项目的ip和端口号。

    页面效果如下：

    4、设置druid访问页面的用户名和密码

    只需要在springboot启动类中加入@bean配置即可：

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    @Bean
    public ServletRegistrationBean<StatViewServlet> druidStatViewServlet() {
        ServletRegistrationBean<StatViewServlet> registrationBean = new ServletRegistrationBean<>(new StatViewServlet(),  "/druid/*");
        registrationBean.addInitParameter("allow", "127.0.0.1");// IP白名单 (没有配置或者为空，则允许所有访问)
        registrationBean.addInitParameter("deny", "");// IP黑名单 (存在共同时，deny优先于allow)
        registrationBean.addInitParameter("loginUsername", "root");
        registrationBean.addInitParameter("loginPassword", "1234");
        registrationBean.addInitParameter("resetEnable", "false");
        return registrationBean;
    }

    druid监控页面的配置和使用

    Druid运用背景

    Druid是由阿里巴巴团队开发的，能够提供强大的监控和扩展功能的数据库连接池。github地址

    本项目的项目框架为SpringBoot+Mybatis+Security，并将druid到项目中，作为一个辅助工具帮助提升项目的性能。

    Druid配置

    1、设置项目依赖

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    <dependency>
     <groupId>com.alibaba</groupId>
         <artifactId>druid-spring-boot-starter</artifactId>
         <version>1.1.10</version>
     </dependency>

    2、application.yml中配置Druid数据源，并设置监控参数。YAML文件格式化校验（https://old.qqe2.com/jsontool/yaml.php）

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    spring:
        #####DruidDataSource配置#####################
        type: com.alibaba.druid.pool.DruidDataSource
        initialSize: 5
        minIdle: 5
        maxActive: 20
        # 配置获取连接等待超时的时间
        maxWait: 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
        timeBetweenEvictionRunsMillis: 60000
        # 配置一个连接在池中最小生存的时间，单位是毫秒
        minEvictableIdleTimeMillis: 300000
        validationQuery: SELECT 1 FROM DUAL
        testWhileIdle: true
        testOnBorrow: false
        testOnReturn: false
        # 打开PSCache，并且指定每个连接上PSCache的大小
        poolPreparedStatements: true
        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
        filters: stat,wall,slf4j
        # 通过connectProperties属性来打开mergeSql功能；慢SQL记录
        connectionProperties: druid.stat.mergeSql=true;druid.stat.slowSqlMillis=5000
        #合并多个DruidDataSource的监控数据
        useGlobalDataSourceStat: true

    3、设置druid访问页面的用户名和密码，只需要在springboot启动类中加入@bean配置即可:

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    /**                                                                                                           
     * @description 注册一个StatViewServlet,进行druid监控页面配置                                                              
     * @return servlet registration bean                                                                          
     */                                                                                                           
    @Bean                                                                                                         
    public ServletRegistrationBean druidStatViewServlet() {
       //先配置管理后台的servLet，访问的入口为/druid/                                                      
        ServletRegistrationBean servletRegistrationBean = new ServletRegistrationBean(                            
               new StatViewServlet(), "/druid/*");
        // IP白名单 (没有配置或者为空，则允许所有访问)
        servletRegistrationBean.addInitParameter("allow", "127.0.0.1");
        // IP黑名单 (存在共同时，deny优先于allow)                                                     
     servletRegistrationBean.addInitParameter("deny", "");          
        servletRegistrationBean.addInitParameter("loginUsername", "admin");                                       
        servletRegistrationBean.addInitParameter("loginPassword", "sdb3309");                                     
        servletRegistrationBean.addInitParameter("resetEnable", "false");                                         
        return servletRegistrationBean;                                                                           
    }

    4、注册一个过滤器，允许Druid监控页面的正常浏览

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    /**                                                                                                                     
     * @description 注册一个过滤器，允许页面正常浏览                                                                  
     * @return filter registration bean                                                                                     
     */                                                                                                                     
    @Bean                                                                                                                   
    public FilterRegistrationBean druidStatFilter(){                                                                        
        FilterRegistrationBean filterRegistrationBean = new FilterRegistrationBean(                                         
                new WebStatFilter());                                                                                       
        // 添加过滤规则.                                                                                                          
        filterRegistrationBean.addUrlPatterns("/*");                                                                        
        // 添加不需要忽略的格式信息.                                                                                                    
        filterRegistrationBean.addInitParameter("exclusions", "*.js,*.gif,*.jpg,*.png,*.css,*.ico,/druid/*");               
        return filterRegistrationBean;                                                                                      
    }

    5、启动项目后，访问页面http://ip:port/druid/sql.html（其中ip和端口号为项目的ip和端口号），使用配置的用户名与密码登录，就可以访问监控页面了。

    Druid详细配置

    开启慢sql监控

    SQL监控中，有一项关于sql执行最慢执行时间的统计，但是只有一个值，就是一条sql语句最慢的执行时间记录，其他执行时间是看不到的，只能通过总时间来进行粗略的估计；一旦项目重启，这些记录就全部消失，因此需要制定相应的日志输出策略。

    具体步骤：

    1、配置慢sql及日志拦截器

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    /**                         
     * @description 配置慢sql拦截器       
     * @return                  
     */                         
     @Bean(name = "statFilter")                                                
     public StatFilter statFilter(){                                           
         StatFilter statFilter = new StatFilter();                             
         //慢sql时间设置,即执行时间大于200毫秒的都是慢sql                                        
         statFilter.setSlowSqlMillis(30);                                      
         statFilter.setLogSlowSql(true);
         statFilter.setMergeSql(true);                                       
         return statFilter;                                                    
     }                                                                         
      /**                         
     * @description 配置日志拦截器       
     * @return                  
     */                                                                        
     @Bean(name = "logFilter")                                                 
     public Slf4jLogFilter logFilter(){                                        
         Slf4jLogFilter slf4jLogFilter = new Slf4jLogFilter();                 
         slf4jLogFilter.setDataSourceLogEnabled(true);                         
         slf4jLogFilter.setStatementExecutableSqlLogEnable(true);              
         return slf4jLogFilter;                                                
     }

    2、修改application.yml，增加慢sql日志的输出策略

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    logging:
      pattern: #配置日志格式 %d：日期 , %msg：日志信息 ，%n换行
       console: "%d - %msg%n" #设置控制台打印格式
      file: "%d{yyyy/MM/dd-HH:mm} %-5level %logger- %msg%n"
    level:
     root: INFO
        org:
          springframework:
          security: ERROR
          web: ERROR
          hhu.yu: INFO
    file:
     name: YU.log
        max-history: 30

    3、修改数据源配置，设置慢sql拦截器和sql拦截器

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    @Bean                                                                   
     @Primary                     
     @Qualifier("mainDataSource")                                            
     @ConfigurationProperties(prefix = "spring.datasource.main")             
     DataSource mainConfig() throws SQLException{                            
         DruidDataSource build = DruidDataSourceBuilder.create().build();    
         List<Filter> filters = new ArrayList<>();                           
         filters.add(statFilter());                                          
         filters.add(logFilter());                                           
         build.setProxyFilters(filters);                                     
         return build;

    重启系统后查看druid监控后台，由于设置了慢sql的时间为大于200毫秒，所以执行时间大于200毫秒的都会被红色标注。查看日志文件，可以看到日志文件中存在慢sql记录的数据（包括慢sql以及这条sql语句执行的时间）

    开启Spring监控

    在监控面板中开启spring监控功能

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    @Configuration
    @EnableAspectJAutoProxy(proxyTargetClass = true)
    public class DruidAspectConfig {
        @Bean
        public DruidStatInterceptor druidStatInterceptor() {
            DruidStatInterceptor dsInterceptor = new DruidStatInterceptor();
            return dsInterceptor;
        }
        @Bean
        @Scope("prototype")
        public JdkRegexpMethodPointcut druidStatPointcut() {
            JdkRegexpMethodPointcut pointcut = new JdkRegexpMethodPointcut();
            pointcut.setPatterns("com.qa.cloud.mapper.*","com.qa.cloud.service.*");
            return pointcut;
        }
        @Bean
        public DefaultPointcutAdvisor druidStatAdvisor(DruidStatInterceptor druidStatInterceptor, JdkRegexpMethodPointcut druidStatPointcut) {
            DefaultPointcutAdvisor defaultPointAdvisor = new DefaultPointcutAdvisor();
            defaultPointAdvisor.setPointcut(druidStatPointcut);
            defaultPointAdvisor.setAdvice(druidStatInterceptor);
            return defaultPointAdvisor;
        }
    转自：https://www.jb51.net/article/215301.htm
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  • 原文地址：https://www.cnblogs.com/javalinux/p/15662597.html
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