Druid 配置

Druid

1. Druid Maven 依赖

<!-- 导入自定义 Druid 数据源 -->
<!-- https://mvnrepository.com/artifact/com.alibaba/druid -->
<dependency>
	<groupId>com.alibaba</groupId>
    <artifactId>druid</artifactId>
    <version>1.1.20</version>
</dependency>

2.Druid常见 yml 配置

spring:
  datasource:
    url: jdbc:mysql://localhost:3306/commonadmin?serverTimezone=Asia/Shanghai&characterEncoding=utf8&useSSL=false
    username: xxxxx
    password: xxxxx
    driver-class-name: com.mysql.cj.jdbc.Driver
    type: com.alibaba.druid.pool.DruidDataSource
    
    
	## 开始配置DruidDataSource
    #Spring Boot 默认是不注入这些属性值的，需要自己绑定
    #druid 数据源专有配置
    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，stat:监控统计、log4j：日志记录、wall：防御sql注入
    #如果允许时报错  java.lang.ClassNotFoundException: org.apache.log4j.Priority
    #则导入 log4j 依赖即可，Maven 地址：https://mvnrepository.com/artifact/log4j/log4j
    filters: stat,wall,log4j
    maxPoolPreparedStatementPerConnectionSize: 20
    useGlobalDataSourceStat: true
    connectionProperties: druid.stat.mergeSql=true;druid.stat.slowSqlMillis=500

3.配置类 DruidConfig.java

package com.zolmk.commonadmin.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.Arrays;
import java.util.HashMap;
import java.util.Map;
/**
 * @author : zolmk
 * @project : CommonAdmin
 * @date : 2020/5/6 20:49
 **/

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

    /**
     *  配置 Druid 的监控
     *  配置一个管理后台的 Servlet
     * @return
     */
    @Bean
    public ServletRegistrationBean statViewServlet()
    {
        ServletRegistrationBean bean = new ServletRegistrationBean(new StatViewServlet(),"/druid/*");
        Map<String,String> map = new HashMap<>();
        // 这些值在 ResourceServlet 类中可以看到
        map.put("loginUsername","zolmk");
        map.put("loginPassword","zolmk123456");
        bean.setInitParameters(map);
        return bean;

    }

    @Bean
    public FilterRegistrationBean filter()
    {
        FilterRegistrationBean bean = new FilterRegistrationBean();
        bean.setFilter(new WebStatFilter());
        Map<String,String> map = new HashMap<>();
        map.put("exclusions","*.js,*.css,/druid/*");
        bean.setInitParameters(map);

        bean.setUrlPatterns(Arrays.asList("/*"));
        return bean;
    }
}

4.添加 log4j

<!-- https://mvnrepository.com/artifact/log4j/log4j -->
<!-- 必须添加 不然 druid 会保错 -->
<dependency>
	<groupId>log4j</groupId>
    <artifactId>log4j</artifactId>
    <version>1.2.17</version>
</dependency>