springboot 中使用Druid 数据源提供数据库监控

一、springboot 中注册 Servlet/Filter/Listener 的方式有两种，1 通过代码注册 ServletRegistrationBean、 FilterRegistrationBean 和 ServletListenerRegistrationBean 。

2 通过注解的方式，在 SpringBootApplication 上使用@ServletComponentScan 注解后，Servlet、Filter、Listener 可以直接通过 @WebServlet、@WebFilter、@WebListener 注解自动注册，无需其他代码。

 

二、配置springboot 项目使用Druid 数据源，好处就不多说了，百度一下很多。配置步骤，本机使用maven配置

2.1 引入依赖，完整的pom文件如下

<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
  xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">
  <modelVersion>4.0.0</modelVersion>
  <groupId>com.huitong</groupId>
  <artifactId>demo1</artifactId>
  <packaging>jar</packaging>
  <version>1.0-SNAPSHOT</version>
  <name>demo1 Maven Webapp</name>
  <url>http://maven.apache.org</url>

  <parent>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-parent</artifactId>
    <version>2.0.0.RELEASE</version>
  </parent>

  <properties>
    <java.version>1.8</java.version>
    <mybatis.spring.boot.version>1.3.2</mybatis.spring.boot.version>
    <springfox-swagger.version>2.8.0</springfox-swagger.version>
    <swagger-bootstrap-ui.version>1.7.2</swagger-bootstrap-ui.version>
    <druid.version>1.1.9</druid.version>

  </properties>


  <dependencies>

    <dependency>
      <groupId>com.alibaba</groupId>
      <artifactId>druid</artifactId>
      <version>${druid.version}</version>
    </dependency>

    <!-- https://mvnrepository.com/artifact/io.springfox/springfox-swagger2 -->
    <dependency>
      <groupId>io.springfox</groupId>
      <artifactId>springfox-swagger2</artifactId>
      <version>${springfox-swagger.version}</version>
    </dependency>

    <!-- https://mvnrepository.com/artifact/io.springfox/springfox-swagger-ui -->
    <dependency>
      <groupId>io.springfox</groupId>
      <artifactId>springfox-swagger-ui</artifactId>
      <version>${springfox-swagger.version}</version>
    </dependency>

    <!-- https://mvnrepository.com/artifact/com.github.xiaoymin/swagger-bootstrap-ui -->
    <dependency>
      <groupId>com.github.xiaoymin</groupId>
      <artifactId>swagger-bootstrap-ui</artifactId>
      <version>${swagger-bootstrap-ui.version}</version>
    </dependency>


    <dependency>
      <groupId>org.springframework.boot</groupId>
      <artifactId>spring-boot-starter-web</artifactId>
    </dependency>

    <dependency>
      <groupId>org.springframework.boot</groupId>
      <artifactId>spring-boot-starter-test</artifactId>
      <scope>test</scope>
    </dependency>

    <dependency>
      <groupId>mysql</groupId>
      <artifactId>mysql-connector-java</artifactId>
    </dependency>

    <!-- https://mvnrepository.com/artifact/org.mybatis.spring.boot/mybatis-spring-boot-starter -->
    <dependency>
      <groupId>org.mybatis.spring.boot</groupId>
      <artifactId>mybatis-spring-boot-starter</artifactId>
      <version>${mybatis.spring.boot.version}</version>
    </dependency>


    <!--&lt;!&ndash; 添加缓存支持 &ndash;&gt;-->
    <!--<dependency>-->
      <!--<groupId>org.springframework.boot</groupId>-->
      <!--<artifactId>spring-boot-starter-cache</artifactId>-->
    <!--</dependency>-->

    <!-- 添加 redis 缓存支持 -->
    <dependency>
      <groupId>org.springframework.boot</groupId>
      <artifactId>spring-boot-starter-data-redis</artifactId>
    </dependency>

    <!-- 添加邮件支持 -->
    <dependency>
      <groupId>org.springframework.boot</groupId>
      <artifactId>spring-boot-starter-mail</artifactId>
    </dependency>

    <dependency>
      <groupId>com.jayway.jsonpath</groupId>
      <artifactId>json-path</artifactId>
    </dependency>

    <dependency>
      <groupId>org.projectlombok</groupId>
      <artifactId>lombok</artifactId>
    </dependency>

    <!-- https://mvnrepository.com/artifact/org.apache.commons/commons-lang3 -->
    <dependency>
      <groupId>org.apache.commons</groupId>
      <artifactId>commons-lang3</artifactId>
    </dependency>


    <!-- https://mvnrepository.com/artifact/org.apache.httpcomponents/httpclient -->
    <dependency>
      <groupId>org.apache.httpcomponents</groupId>
      <artifactId>httpclient</artifactId>
    </dependency>

    <!-- Spring boot 热启动依赖 -->
    <dependency>
      <groupId>org.springframework.boot</groupId>
      <artifactId>spring-boot-devtools</artifactId>
      <optional>true</optional>
    </dependency>


  </dependencies>


  <build>
    <finalName>demo1</finalName>
    <resources>
      <resource>
        <directory>src/main/resources</directory>
        <includes>
          <include>**/*.xml</include>
          <include>**/*.properties</include>
        </includes>
      </resource>

      <resource>
        <directory>src/main/java</directory>
        <includes>
          <include>**/*.xml</include>
          <include>**/*.properties</include>
        </includes>
      </resource>
    </resources>

    <!--spring boot maven的构造插件-->
    <plugins>
      <plugin>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-maven-plugin</artifactId>
        <configuration>
          <fork>true</fork>
        </configuration>
      </plugin>

      <plugin>
        <groupId>org.apache.maven.plugins</groupId>
        <artifactId>maven-compiler-plugin</artifactId>
        <configuration>
          <source>${java.version}</source>
          <target>${java.version}</target>
          <testSource>${java.version}</testSource>
          <testTarget>${java.version}</testTarget>
        </configuration>
      </plugin>



    </plugins>
  </build>

</project>

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