如何配置com.alibaba.druid.pool.DruidDataSource的线程池页面监控

配置com.alibaba.druid.pool.DruidDataSource的线程池页面监控，可以按照以下步骤进行操作：

1. 在pom.xml文件中添加Druid的依赖：

<dependency>
    <groupId>com.alibaba</groupId>
    <artifactId>druid-spring-boot-starter</artifactId>
    <version>1.2.11</version>
</dependency>

2. 在application.properties或application.yml文件中添加Druid的配置信息，例如：

# 数据源配置
spring.datasource.url=jdbc:mysql://localhost:3306/test
spring.datasource.username=root
spring.datasource.password=123456
spring.datasource.driver-class-name=com.mysql.jdbc.Driver

# Druid配置
spring.datasource.druid.initial-size=5
spring.datasource.druid.min-idle=5
spring.datasource.druid.max-active=20
spring.datasource.druid.max-wait=60000
spring.datasource.druid.time-between-eviction-runs-millis=60000
spring.datasource.druid.min-evictable-idle-time-millis=300000
spring.datasource.druid.validation-query=SELECT 1 FROM DUAL
spring.datasource.druid.test-while-idle=true
spring.datasource.druid.test-on-borrow=false
spring.datasource.druid.test-on-return=false
spring.datasource.druid.pool-prepared-statements=true
spring.datasource.druid.max-pool-prepared-statement-per-connection-size=20
spring.datasource.druid.filters=stat,wall,log4j
spring.datasource.druid.connection-properties=druid.stat.mergeSql=true;druid.stat.slowSqlMillis=5000

3. 在Spring Boot的启动类上添加`@ServletComponentScan`注解，例如：

@SpringBootApplication
@ServletComponentScan
public class Application {
    public static void main(String[] args) {
        SpringApplication.run(Application.class, args);
    }
}

4. 创建一个继承自`StatViewServlet`的Servlet类，用于配置Druid的监控页面，例如：

@WebServlet(urlPatterns = "/druid/*", initParams = {
        @WebInitParam(name = "loginUsername", value = "admin"), // 登录用户名
        @WebInitParam(name = "loginPassword", value = "admin"), // 登录密码
        @WebInitParam(name = "resetEnable", value = "false") // 禁用HTML页面上的“Reset All”功能
})
public class DruidStatViewServlet extends StatViewServlet {
    private static final long serialVersionUID = 1L;
}

5. 创建一个继承自`WebStatFilter`的Filter类，用于配置Druid的WebStat过滤器，例如：

@WebFilter(filterName = "druidWebStatFilter", urlPatterns = "/*", initParams = {
        @WebInitParam(name = "exclusions", value = "*.js,*.gif,*.jpg,*.png,*.css,*.ico,/druid/*") // 忽略资源
})
public class DruidWebStatFilter extends WebStatFilter {
}

6. 启动Spring Boot应用程序，访问`http://localhost:8080/druid`即可进入Druid的监控页面。