Springboot整合（7）——数据库连接池Druid

1. pom中引入Druid依赖

        <dependency>

            <groupId>com.alibaba</groupId>

            <artifactId>druid</artifactId>

            <version>1.1.6</version>

        </dependency>

2. 在application.yml中对druid进行配置，将之前spring datasource的配置修改为如下内容：红色内容为新增

spring:

  datasource:

    type: com.alibaba.druid.pool.DruidDataSource

    url: jdbc:mysql://localhost:3306/knowledgeisland?useUnicode=true&characterEncoding=UTF-8&autoReconnect=true&allowMultiQueries=true

    username: school

    password: school888888

    driver-class-name: com.mysql.jdbc.Driver

    # 下面为连接池的补充设置，应用到上面所有数据源中

    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,log4j

    # 通过connectProperties属性来打开mergeSql功能；慢SQL记录

    connectionProperties: druid.stat.mergeSql=true;druid.stat.slowSqlMillis=5000

 

3. 编写DruidConfiguration类

@Configuration

publicclass DruidConfiguration {

 

    /**

     * 注册一个StatViewServlet

     *

     * @return

     */

    @Bean

    public ServletRegistrationBean DruidStatViewServle2() {

        // org.springframework.boot.context.embedded.ServletRegistrationBean提供类的进行注册.

        ServletRegistrationBean servletRegistrationBean = new ServletRegistrationBean(new StatViewServlet(),

                "/druid/*");

 

        // 添加初始化参数：initParams

 

        // 白名单：

        servletRegistrationBean.addInitParameter("allow", "127.0.0.1");

        // IP黑名单 (存在共同时，deny优先于allow) : 如果满足deny的话提示:Sorry, you are not

        // permitted to view this page.

        servletRegistrationBean.addInitParameter("deny", "192.168.1.73");

        // 登录查看信息的账号密码.

        servletRegistrationBean.addInitParameter("loginUsername", "admin");

        servletRegistrationBean.addInitParameter("loginPassword", "123456");

        // 是否能够重置数据.

        servletRegistrationBean.addInitParameter("resetEnable", "false");

        returnservletRegistrationBean;

    }

 

    /**

     * 注册一个：filterRegistrationBean

     *

     * @return

     */

    @Bean

    public FilterRegistrationBean druidStatFilter2() {

 

        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,/druid2/*");

        returnfilterRegistrationBean;

    }

 

}

 

4. 测试，访问http://localhost:8088/KnowledgeIsland/druid/，输入DruidConfiguration中配置的用户名密码  

 进入后就可以看到druid的监控后台，