IDEA版SSM入门到实战（Maven+MyBatis+Spring+SpringMVC) -Spring管理第三方bean

第一章 Spring管理第三方bean

1.1 Spring管理druid步骤

• 导入jar包

  
          <dependency>
              <groupId>com.alibabagroupId>
              <artifactId>druidartifactId>
              <version>1.1.10version>
          dependency>
          
          <dependency>
              <groupId>mysqlgroupId>
              <artifactId>mysql-connector-javaartifactId>
              <version>5.1.37version>
  
          dependency>
  

• 编写db.properties配置文件

  #key=value
  db.driverClassName=com.mysql.jdbc.Driver
  db.url=jdbc:mysql://localhost:3306/db220106
  db.username=root
  db.password=root
  

• 编写applicationContext.xml相关代码

  
  <context:property-placeholder location="classpath:db.properties">context:property-placeholder>
  
  
  <bean id="dataSource" class="com.alibaba.druid.pool.DruidDataSource">
      <property name="driverClassName" value="${db.driverClassName}">property>
      <property name="url" value="${db.url}">property>
      <property name="username" value="${db.username}">property>
      <property name="password" value="${db.password}">property>
  bean>
  

• 测试

  @Test
  public void testDruidDataSource() throws Exception{
      //获取容器对象
      ApplicationContext ioc =
              new ClassPathXmlApplicationContext("applicationContext_druid.xml");
  
      DruidDataSource dataSource = ioc.getBean("dataSource", DruidDataSource.class);
      System.out.println("dataSource = " + dataSource);
  
      DruidPooledConnection connection = dataSource.getConnection();
      System.out.println("connection = " + connection);
  
  }