正常整合Druid操作如下：

1、加载依赖：
 

        <dependency>
            <groupId>com.alibaba</groupId>
            <artifactId>druid-spring-boot-starter</artifactId>
            <version>1.1.10 </version>
        </dependency>

        <dependency>
            <groupId>log4j</groupId>
            <artifactId>log4j</artifactId>
            <version>1.2.17</version>
        </dependency>

2、配置application.yml文件

#SpringBoot默认是不注入这些的，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
      #如果允许报错，java.lang.ClassNotFoundException: org.apache.Log4j.Properity
      #则导入log4j 依赖就行
      filters: stat,wall,log4j
      maxPoolPreparedStatementPerConnectionSize: 20
      useGlobalDataSourceStat: true
      connectionProperties: druid.stat.mergeSql=true;druid.stat.slowSqlMillis=500

3.配置config文件

@Configuration
public class DruidConfig {

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


    //后台监控
    @Bean
    public ServletRegistrationBean statViewServlet(){
        ServletRegistrationBean<StatViewServlet> bean = new ServletRegistrationBean<>(new StatViewServlet(), "/druid/*");

        //后台需要有人登录，账号密码配置
        HashMap<String, String> initParameters = new HashMap<>();

        //增加配置
        initParameters.put("loginUsername","admin");
        initParameters.put("loginPassword","123456");

        //允许谁可以访问
        initParameters.put("allow","");

        //禁止谁访问     initParameters.put("xiaowu","192.168.1.1");


        bean.setInitParameters(initParameters);//设置初始化参数
        return bean;
    }
}

但是无论检查多少遍都是错误，原因是这里：

ServletRegistrationBean<StatViewServlet> bean = new ServletRegistrationBean<>(new StatViewServlet(), "/druid/*");

后面的/druid/*只用一个* 

更改后终于成功进入