dependency              groupId org.springframework.boot /groupId              artifactId spring-boot-starter-data-jdbc /artifactId          /dependency 

spring:  datasource:    username: root    password: 5201314    url: jdbc:mysql:///jqmb?serverTimezone=UTC    driver-class-name: com.mysql.cj.jdbc.Driver

    //java项目www.fhadmin.org    @Autowired      DataSource dataSource;    @Test    void contextLoads() {        System.out.println(dataSource.getClass());        System.out.println(\"____________________________________\");    }

         dependency              groupId com.alibaba /groupId              artifactId druid /artifactId              version 1.0.18 /version          /dependency 

#java项目www.fhadmin.orgspring:  datasource:    username: root    password: 5201314    url: jdbc:mysql:///jqmb?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    filters: stat,wall,log4j    maxPoolPreparedStatementPerConnectionSize: 20    useGlobalDataSourceStat: true    connectionProperties: druid.stat.mergeSql=true;druid.stat.slowSqlMillis=500

//java项目www.fhadmin.org@Configurationpublic class DataSource_Druid_Configure {    @ConfigurationProperties(prefix = \"spring.datasource\")    @Bean    public DruidDataSource getDataSour(){        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 bean = new ServletRegistrationBean(new StatViewServlet(), \"/druid/*\");        Map String,String  initParams = new HashMap ();        initParams.put(\"loginUsername\",\"admin\");//登录用户名        initParams.put(\"loginPassword\",\"123456\");//登录密码        initParams.put(\"allow\",\"\");//默认就是允许所有访问        initParams.put(\"deny\",\"192.168.15.21\");//拒绝访问        bean.setInitParameters(initParams);        return bean;    }