springboot-7-配置druid数据源监视

关于druid数据源的配置, 上个博客已经说过了,再说一遍吧

1, 引入依赖
2, 配置properties参数
3, 编写servlet和filter提供页面监视
4, 测试 

1, 引入maven依赖

<!-- druid数据源 -->
        <dependency>
            <groupId>com.alibaba</groupId>
            <artifactId>druid</artifactId>
            <version>1.0.25</version>
        </dependency>

2, 在properties中设置参数, 记得把默认的注释掉

# 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, 配置监控

　　这里有2种配置方式, 分别说

　　1), 基于springboot的注解进行配置

　　filter

package com.iwhere.druid;

import javax.servlet.annotation.WebFilter;
import javax.servlet.annotation.WebInitParam;

import com.alibaba.druid.support.http.WebStatFilter;

/**
 * 配置druid监视源的filter
 */
@WebFilter(filterName="druidWebStatFilter",urlPatterns="/*",  
initParams={  
    @WebInitParam(name="exclusions",value="*.js,*.gif,*.jpg,*.bmp,*.png,*.css,*.ico,/druid/*")//忽略资源  
}  
) 
public class DruidStatFilter extends WebStatFilter{
 
}

　　　　servlet:

package com.iwhere.druid;

import javax.servlet.annotation.WebInitParam;  
import javax.servlet.annotation.WebServlet;  
  
import com.alibaba.druid.support.http.StatViewServlet;  
  
@WebServlet(urlPatterns="/druid/*",  
    initParams={  
         @WebInitParam(name="allow",value="127.0.0.1,192.168.163.1"),// IP白名单(没有配置或者为空，则允许所有访问)  
         @WebInitParam(name="deny",value="192.168.1.73"),// IP黑名单 (存在共同时，deny优先于allow)  
         @WebInitParam(name="loginUsername",value="admin"),// 用户名  
         @WebInitParam(name="loginPassword",value="123"),// 密码  
         @WebInitParam(name="resetEnable",value="false")// 禁用HTML页面上的“Reset All”功能  
})  
public class DruidStatViewServlet extends StatViewServlet {  
    private static final long serialVersionUID = -2688872071445249539L;  
  
}  

　　　　2), 第二种配置方式, 使用ServletRegistrationBean 和FilterRegistrationBean的方式进行注册Servlet和Filter

import com.alibaba.druid.pool.DruidDataSource;
import com.alibaba.druid.support.http.StatViewServlet;
import com.alibaba.druid.support.http.WebStatFilter;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.boot.context.embedded.FilterRegistrationBean;
import org.springframework.boot.context.embedded.ServletRegistrationBean;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;

import javax.sql.DataSource;
import java.sql.SQLException;

@Configuration
public class DruidConfiguration {
    @Bean
    public ServletRegistrationBean druidServlet() {
        ServletRegistrationBean reg = new ServletRegistrationBean();
         reg.setServlet(new StatViewServlet());
         reg.addUrlMappings("/druid/*");
         //reg.addInitParameter("allow", "127.0.0.1");
         //reg.addInitParameter("deny","");
         reg.addInitParameter("loginUsername", "admin");
         reg.addInitParameter("loginPassword", "admin"); 
        return reg;
    }

    @Bean
    public DataSource druidDataSource(@Value("${spring.datasource.driverClassName}") String driver,
                                      @Value("${spring.datasource.url}") String url,
                                      @Value("${spring.datasource.username}") String username,
                                      @Value("${spring.datasource.password}") String password) {
        DruidDataSource druidDataSource = new DruidDataSource();
        druidDataSource.setDriverClassName(driver);
        druidDataSource.setUrl(url);
        druidDataSource.setUsername(username);
        druidDataSource.setPassword(password);
        try {
            druidDataSource.setFilters("stat, wall");
        } catch (SQLException e) {
            e.printStackTrace();
        }
        return druidDataSource;
    }

    @Bean
    public FilterRegistrationBean filterRegistrationBean() {
        FilterRegistrationBean filterRegistrationBean = new FilterRegistrationBean();
        filterRegistrationBean.setFilter(new WebStatFilter());
        filterRegistrationBean.addUrlPatterns("/*");
        filterRegistrationBean.addInitParameter("exclusions", "*.js,*.gif,*.jpg,*.png,*.css,*.ico,/druid/*");
        return filterRegistrationBean;
    }
}

4, 之后既可以通过地址: http://localhost:8080/springboot-learn/druid/index.html 进行访问