SpringBoot_数据访问-整合Druid&配置数据源监控

Posted 2020-11-20 猴子特种兵

第一步，在pom.xml文件中导入druid的文件信息
    <!-- https://mvnrepository.com/artifact/com.alibaba/druid -->
        <dependency>
            <groupId>com.alibaba</groupId>
            <artifactId>druid</artifactId>
            <version>1.1.8</version>
        </dependency>

第二部，在application.yml配置文件中添加数据源信息
spring:
  datasource:
    username: root
    password: root
    url: jdbc:mysql://localhost:3306/test
    driver-class-name: com.mysql.jdbc.Driver
    type: com.alibaba.druid.pool.DruidDataSource
#   schema:
#     - classpath:oa_course.sql 数据库要执行的脚本
#   数据源其他配置
    initialSize: 5
    minIdle: 5
    maxActive: 20
    maxWait: 60000
    timeBetweenEvictionRunsMillis: 60000
    minEvictableIdleTimeMillis: 300000
    validationQuery: SELECT 1 FROM DUAL
    testWhileIdle: true
    testOnBorrow: false
    testOnReturn: false
    poolPreparedStatements: true
#   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
    maxPoolPreparedStatementPerConnectionSize: 20
    useGlobalDataSourceStat: true
    connectionProperties: druid.stat.mergeSql=true;druid.stat.slowSqlMillis=500

正常druid的一些配置信息是不能使用的需要我们手动写一个配置类：

package com.baoxing.springboot.config;

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

import javax.sql.DataSource;
import java.util.Arrays;
import java.util.HashMap;
import java.util.Map;

/**
 * Created by chengbx on 2018/6/10.
 */
@Configuration
public class DruidConfig {

    @ConfigurationProperties(prefix = "spring.datasource")
    @Bean(name = "dataSource")
    public DataSource druid(){
        return  new DruidDataSource();
    }
    //配置Druid的监控
    //1.配置一个管理后台的Servlet
    @Bean
    public ServletRegistrationBean statViewServlet(){
        ServletRegistrationBean servletRegistrationBean = new ServletRegistrationBean(new StatViewServlet(), "/druid/*");
        Map<String,String> initParas = new HashMap<>();
        initParas.put("loginUsername","cbx");//后台登录用户
        initParas.put("loginPassword","aaa147");//后台登录密码
        initParas.put("allow","");//默认允许所有访问
        servletRegistrationBean.setInitParameters(initParas);
        return servletRegistrationBean;
    }

    //2.配置一个监控的filter
    @Bean
    public FilterRegistrationBean webstatFilter(){
        FilterRegistrationBean filterRegistrationBean = new FilterRegistrationBean();
        filterRegistrationBean.setFilter(new WebStatFilter());
        Map<String,String> initParas = new HashMap<>();
        initParas.put("exclusions","*.js,*.css,/druid/*");//哪些文件不进行过滤

        filterRegistrationBean.setInitParameters(initParas);
        filterRegistrationBean.setUrlPatterns(Arrays.asList("/*"));
        return filterRegistrationBean;
    }
}

手动写一个测试类，调用数据库测试

package com.baoxing.springboot.controller;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.jdbc.core.JdbcTemplate;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.ResponseBody;

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

/**
 * Created by chengbx on 2018/6/10.
 */
@Controller
public class HelloController {

    @Autowired
    private JdbcTemplate jdbcTemplate;

    @ResponseBody
    @GetMapping("/query")
    public List<Map<String,Object>> map(){
        List<Map<String,Object>> list = jdbcTemplate.queryForList("select * from oa_course");

        return list;
    }

}

出现如下界面则说明数据源配置成功