yml配置动态数据源(数据库@DS)与引起(If you want an embedded database (H2, HSQL or Derby))类问题

1：yml 配置

spring:
  datasource:
    dynamic:
      datasource:
        master:
          url: jdbc:mysql://192.168.11.50:3306/dsdd?characterEncoding=UTF-8&useUnicode=true&useSSL=false&tinyInt1isBit=false&allowPublicKeyRetrieval=true&serverTimezone=UTC
          username: root
          password: root
          driver-class-name: com.mysql.cj.jdbc.Driver
        second-datasource:
          url: jdbc:mysql://192.168.11.50:3306/commons_utils?characterEncoding=UTF-8&useUnicode=true&useSSL=false&tinyInt1isBit=false&allowPublicKeyRetrieval=true&serverTimezone=UTC
          username: root
          password: root
          driver-class-name: com.mysql.cj.jdbc.Driver

2：必须pom依赖配

        
        <dependency>
            <groupId>com.baomidougroupId>
            <artifactId>dynamic-datasource-spring-boot-starterartifactId>
            <version>3.2.0version>
        dependency>

2-1：不要加入一下依赖不然会报以下错误

        <dependency>
            <groupId>com.h2databasegroupId>
            <artifactId>h2artifactId>
            <version>1.4.200version>
            <scope>runtimescope>
        dependency>

        
        <dependency>
            <groupId>com.alibabagroupId>
            <artifactId>druid-spring-boot-starterartifactId>
            <version>1.2.6version>
        dependency>

2-2：当出现以上错误可以在yml配置文件去掉DruidDataSourceAutoConfigure，如下

spring:
  autoconfigure:
    exclude: com.alibaba.druid.spring.boot.autoconfigure.DruidDataSourceAutoConfigure

3：加入druid管理

spring:
  autoconfigure:
    exclude: com.alibaba.druid.spring.boot.autoconfigure.DruidDataSourceAutoConfigure
  datasource:
    druid:
      stat-view-servlet:
        enabled: true
        loginUsername: admin
        loginPassword: 123456
        allow:
      web-stat-filter:
        enabled: true
    dynamic:
      druid: # 全局druid参数，绝大部分值和默认保持一致。(现已支持的参数如下,不清楚含义不要乱设置)
        # 连接池的配置信息
        # 初始化大小，最小，最大
        initial-size: 5
        min-idle: 5
        maxActive: 20
        # 配置获取连接等待超时的时间r
        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
        timeBetweenEvictionRunsMillis: 60000
        # 配置一个连接在池中最小生存的时间，单位是毫秒
        minEvictableIdleTimeMillis: 300000
        validationQuery: SELECT 1 FROM DUAL
        testWhileIdle: true
        testOnBorrow: false
        testOnReturn: false
        # 打开PSCache，并且指定每个连接上PSCache的大小
        poolPreparedStatements: true
        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
        filters: stat,wall,slf4j
        # 通过connectProperties属性来打开mergeSql功能；慢SQL记录
        connectionProperties: druid.stat.mergeSql\=true;druid.stat.slowSqlMillis\=5000
      datasource:
        master:
          url: jdbc:mysql://192.168.11.50:3306/dsdd?characterEncoding=UTF-8&useUnicode=true&useSSL=false&tinyInt1isBit=false&allowPublicKeyRetrieval=true&serverTimezone=UTC
          username: root
          password: root
          driver-class-name: com.mysql.cj.jdbc.Driver
        second:
          url: jdbc:mysql://192.168.11.50:3306/commons_utils?characterEncoding=UTF-8&useUnicode=true&useSSL=false&tinyInt1isBit=false&allowPublicKeyRetrieval=true&serverTimezone=UTC
          username: root
          password: root
          driver-class-name: com.mysql.cj.jdbc.Driver

3-1：加入依赖

        
        <dependency>
            <groupId>com.baomidougroupId>
            <artifactId>dynamic-datasource-spring-boot-starterartifactId>
            <version>3.2.0version>
        dependency>

        
        <dependency>
            <groupId>com.alibabagroupId>
            <artifactId>druid-spring-boot-starterartifactId>
            <version>1.2.6version>
        dependency>

3-2：DruidConfig 配置类

package com.example.poi.config;

import com.alibaba.druid.spring.boot.autoconfigure.DruidDataSourceAutoConfigure;
import com.alibaba.druid.spring.boot.autoconfigure.properties.DruidStatProperties;
import com.alibaba.druid.util.Utils;
import org.springframework.boot.autoconfigure.AutoConfigureAfter;
import org.springframework.boot.autoconfigure.condition.ConditionalOnProperty;
import org.springframework.boot.autoconfigure.condition.ConditionalOnWebApplication;
import org.springframework.boot.web.servlet.FilterRegistrationBean;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;

import javax.servlet.*;
import java.io.IOException;

/**
 * @Description: DruidConfig配置类
 */
@Configuration
@AutoConfigureAfter(DruidDataSourceAutoConfigure.class)
public class DruidConfig {

    /**
     * 带有广告的common.js全路径，druid-1.1.14
     */
    private static final String FILE_PATH = "support/http/resources/js/common.js";
    /**
     * 原始脚本，触发构建广告的语句
     */
    private static final String ORIGIN_JS = "this.buildFooter();";
    /**
     * 替换后的脚本
     */
    private static final String NEW_JS = "//this.buildFooter();";

    /**
     * 去除Druid监控页面的广告
     *
     * @param properties DruidStatProperties属性集合
     * @return {@link FilterRegistrationBean}
     */
    @Bean
    @ConditionalOnWebApplication
    @ConditionalOnProperty(name = "spring.datasource.druid.stat-view-servlet.enabled", havingValue = "true")
    public FilterRegistrationBean<RemoveAdFilter> removeDruidAdFilter(
            DruidStatProperties properties) throws IOException {
        // 获取web监控页面的参数
        DruidStatProperties.StatViewServlet config = properties.getStatViewServlet();
        // 提取common.js的配置路径
        String pattern = config.getUrlPattern() != null ? config.getUrlPattern() : "/druid/*";
        String commonJsPattern = pattern.replaceAll("\\*", "js/common.js");
        // 获取common.js
        String text = Utils.readFromResource(FILE_PATH);
        // 屏蔽 this.buildFooter(); 不构建广告
        final String newJs = text.replace(ORIGIN_JS, NEW_JS);
        FilterRegistrationBean<RemoveAdFilter> registration = new FilterRegistrationBean<>();
        registration.setFilter(new RemoveAdFilter(newJs));
        registration.addUrlPatterns(commonJsPattern);
        return registration;
    }

    /**
     * 删除druid的广告过滤器
     *
     * @author BBF
     */
    private class RemoveAdFilter implements Filter {

        private final String newJs;

        public RemoveAdFilter(String newJs) {
            this.newJs = newJs;
        }

        @Override
        public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain)
                throws IOException, ServletException {
            chain.doFilter(request, response);
            // 重置缓冲区，响应头不会被重置
            response.resetBuffer();
            response.getWriter().write(newJs);
        }
    }
}