一，Druid是什麼？

Druid是Java語言中最好的資料庫連線池。Druid能夠提供強大的監控和擴充套件功能。

二， 在哪裡下載druid

maven中央倉庫: http://central.maven.org/maven2/com/alibaba/druid/

三， 怎麼獲取Druid的原始碼

Druid是一個開源專案，原始碼託管在github上，原始碼倉庫地址是 https://github.com/alibaba/druid。同時每次Druid釋出正式版本和快照的時候，都會把原始碼打包，你可以從上面的下載地址中找到相關版本的原始碼

專案配置

pom.xml

 <dependency>
      <groupId>com.alibaba</groupId>
      <artifactId>druid</artifactId>
      <version>1.1.10</version>
    </dependency>
    <!--自啟動Druid管理後臺-->
    <dependency>
      <groupId>com.alibaba</groupId>
      <artifactId>druid-spring-boot-starter</artifactId>
      <version>1.1.10</version>
    </dependency>

application.yml

server:
 port: 8080

spring:
 datasource:
  username: root
  password: root
  url: jdbc:mysql://localhost:3306/mybatis?useUnicode=true&characterEncoding=utf-8&useSSL=true&serverTimezone=UTC
  driver-class-name: com.mysql.cj.jdbc.Driver

  type: com.alibaba.druid.pool.DruidDataSource
  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
  maxPoolPreparedStatementPerConnectionSize: 25
  filters: stat,wall,slf4j
  connectionProperties: druid.stat.mergeSql=true;druid.stat.slowSqlMillis=500
  useGlobalDataSourceStat: true

 cache:
  type: redis
 redis:
  host: 127.0.0.1
  port: 6379
  password:
  pool:
   max-active: 100
   max-idle: 10
   max-wait: 100000
  lettuce:
   shutdown-timeout: 0
  timeout: 5000
  database: 0

thymeleaf:
 cache: false;

mybatis:
 mapper-locations: classpath:zhw.example.zhw.loginModule.loginDao/*.xml

配置JdbcConfig

package zhw.example.zhw.loginModule.config;

import com.alibaba.druid.pool.DruidDataSource;
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.ServletRegistrationBean;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;

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

@Configuration
public class JdbcConfig {
  @ConfigurationProperties(prefix = "spring.datasource")
  @Bean
  public DataSource dataSource(){
    return new DruidDataSource();
  }

  /**
   * 配置Druid監控
   *
   * @return StatViewServlet
   */
  @Bean
  public ServletRegistrationBean servletRegistrationBean() {
    ServletRegistrationBean<StatViewServlet> bean = new ServletRegistrationBean<>(new StatViewServlet(),"/druid/*");
    Map<String,String> map = new HashMap<>();
    //訪問的使用者名稱密碼
    map.put(StatViewServlet.PARAM_NAME_USERNAME,"root");
    map.put(StatViewServlet.PARAM_NAME_PASSWORD,"root");
    //允許訪問的ip，預設是所有ip
    map.put(StatViewServlet.PARAM_NAME_ALLOW,"");
    //禁止訪問的ip
    map.put(StatViewServlet.PARAM_NAME_DENY,"192.168.1.1");
    bean.setInitParameters(map);
    return bean;
  }

  /**
   * 配置一個監控的filter
   *
   * @return WebStatFilter
   */
  @Bean
  public FilterRegistrationBean filterRegistrationBean() {
    FilterRegistrationBean<WebStatFilter> bean = new FilterRegistrationBean<>();
    bean.setFilter(new WebStatFilter());
    Map<String,String> map = new HashMap<>();
    //移除這些監聽
    map.put(WebStatFilter.PARAM_NAME_EXCLUSIONS,"*.js,*.css,/druid/*,*.gif,*.jpg,*.png");
    bean.setInitParameters(map);
    //攔截所有請求，全部都要走druid監聽
    bean.setUrlPatterns(Collections.singletonList("/*"));
    return bean;
  }

}

測試配置url白名單

如果工程中配置了Apache Shiro，需要在配置類中新增白名單

監控介面

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