SpringBoot整合Druid及配置数据源监控

一、SpringBoot整合Druid

1、pom.xml文件引入如下配置：截图及代码如下：

    4.0.0
    
        org.springframework.boot
        spring-boot-starter-parent
        2.2.1.RELEASE
         
    
    com.rf
    springboootdata
    0.0.1-SNAPSHOT
    springboootdata
    Demo project for Spring Boot

    
        1.8
    

    
        
            log4j
            log4j
            1.2.17
        
        
            org.springframework.boot
            spring-boot-starter-data-jdbc
        
        
            mysql
            mysql-connector-java
            5.1.46
        
        
            com.alibaba
            druid
            1.1.21
        
        
            org.springframework.boot
            spring-boot-starter-web
        
        
            org.springframework.boot
            spring-boot-starter-test
            test
            
                
                    org.junit.vintage
                    junit-vintage-engine
                
            
        
    

    
        
            
                org.springframework.boot
                spring-boot-maven-plugin
            
        
    

2、log4j.properties配置，lz为了测试，简单配置了控制台输出日志，如下图：

#应用于控制台
log4j.rootLogger=DEBUG, stdout
# Console output...
log4j.appender.stdout=org.apache.log4j.ConsoleAppender
log4j.appender.stdout.layout=org.apache.log4j.PatternLayout
log4j.appender.stdout.layout.ConversionPattern=%5p [%t] - %m%n

3、编写druid配置类，绑定application.yml文件中数据源其他配置的属性，截图及代码如下：

package com.rf.springbooot.config;

import com.alibaba.druid.pool.DruidDataSource;
import org.springframework.boot.context.properties.ConfigurationProperties;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;

import javax.sql.DataSource;


@Configuration
public class DruidConfig {

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

4、测试连接数据库是否可以查到表数据，截图及代码如下：

import org.springframework.web.bind.annotation.ResponseBody;

import java.util.List;
import java.util.Map;

@Controller
public class HelloController {
    @Autowired
    JdbcTemplate jdbcTemplate;

    @GetMapping("query")
    @ResponseBody
    public  Map hello(){
         List maps = jdbcTemplate.queryForList("select * from sys_user");
         return  maps.get(0);
    }
}

5、浏览器访问 http://localhost:8080/query ，如又数据返回证明SpringBoot整合Druid成功。

二、配置数据源监控

1、在springboot整合Druid的基础上，在druid配置类中添加后台管理的Servlet方法和web监控的filter方法,截图及代码如下：

package com.rf.springbooot.config;

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

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监控
     * 1、配置一个后台管理的Servlet
     * */
    @Bean
    public ServletRegistrationBean statViewServlet(){
        ServletRegistrationBean servletRegistrationBean = new ServletRegistrationBean(new StatViewServlet(), "/druid/*");
        Map map =new HashMap();
        map.put("loginUsername","111");
        map.put("loginPassword","111");
        map.put("allow","");//默认允许所有访问
        map.put("deny","192.168.0.1");//拒绝本地ip访问
        servletRegistrationBean.setInitParameters(map);
        return  servletRegistrationBean;
    }
    /**
     * 2、配置一个web监控的filter
     * */
    @Bean
    public FilterRegistrationBean webStatServlet(){
        FilterRegistrationBean filterRegistrationBean = new FilterRegistrationBean();
        filterRegistrationBean.setFilter(new WebStatFilter());
        Map map =new HashMap();
        map.put("exclusions","*.js,*.css,/druid/*");
        filterRegistrationBean.setInitParameters(map);
        filterRegistrationBean.setUrlPatterns(Arrays.asList("/*"));
        return filterRegistrationBean;
    }
}

2、启动springboot应用，在浏览器中输入 http://localhost:8080/druid ；输入用户名：111；密码：111；访问druid的后台管理，截图如下: