spring boot集成druid连接池

<dependency>
  <groupId>com.alibaba</groupId>
  <artifactId>druid</artifactId>
  <version>1.0.24</version>
</dependency>

spring.datasource.type=com.alibaba.druid.pool.DruidDataSource
spring.datasource.driver-class-name=com.mysql.jdbc.Driver
spring.datasource.url=jdbc:mysql://127.0.0.1:3306/test
spring.datasource.username=root
spring.datasource.password=123456
# 初始化大小，最小，最大
spring.datasource.initialSize=5
spring.datasource.minIdle=5
spring.datasource.maxActive=20
# 配置获取连接等待超时的时间
spring.datasource.maxWait=60000
# 配置间隔多久才进行一次检测，检测需要关闭的空闲连接，单位是毫秒
spring.datasource.timeBetweenEvictionRunsMillis=60000
# 配置一个连接在池中最小生存的时间，单位是毫秒
spring.datasource.minEvictableIdleTimeMillis=300000
spring.datasource.validationQuery=SELECT 1 FROM DUAL
spring.datasource.testWhileIdle=true
spring.datasource.testOnBorrow=false
spring.datasource.testOnReturn=false
# 打开PSCache，并且指定每个连接上PSCache的大小
spring.datasource.poolPreparedStatements=true
spring.datasource.maxPoolPreparedStatementPerConnectionSize=20
# 配置监控统计拦截的filters，去掉后监控界面sql无法统计，'wall'用于防火墙
spring.datasource.filters=stat,wall,log4j
# 通过connectProperties属性来打开mergeSql功能；慢SQL记录
spring.datasource.connectionProperties=druid.stat.mergeSql=true;druid.stat.slowSqlMillis=5000

@Configuration
public class DruidConfiguration {
    /**
     * 注册一个StatViewServlet
     * @return
     * 
     */
    @Bean
    public ServletRegistrationBean DruidStatViewServle2() {
        ServletRegistrationBean servletRegistrationBean = new ServletRegistrationBean(new StatViewServlet(), "/druid/*");
        // 添加初始化参数：initParams
        // 白名单：
        servletRegistrationBean.addInitParameter("allow", "127.0.0.1");
        // 登录查看信息的账号密码.
        servletRegistrationBean.addInitParameter("loginUsername", "admin");
        servletRegistrationBean.addInitParameter("loginPassword", "admin");
        // 是否能够重置数据.
        servletRegistrationBean.addInitParameter("resetEnable", "false");
        return servletRegistrationBean;
    }

    /**
     * 注册一个：filterRegistrationBean
     * @return
     * 
     */
    @Bean
    public FilterRegistrationBean druidStatFilter2() {
        FilterRegistrationBean filterRegistrationBean = new FilterRegistrationBean(new WebStatFilter());
        // 添加过滤规则.
        filterRegistrationBean.addUrlPatterns("/*");
        // 添加不需要忽略的格式信息.
        filterRegistrationBean.addInitParameter("exclusions", "*.js,*.gif,*.jpg,*.png,*.css,*.ico,/druid/*");
        return filterRegistrationBean;
    }
}

@Bean(destroyMethod = "close", initMethod = "init")
public DataSource writeDataSource() {
    System.err.println("注入druid！！！");
    DruidDataSource dataSource = new DruidDataSource();
    dataSource.setUrl(propertyResolver.getProperty("url"));
    dataSource.setUsername(propertyResolver.getProperty("username"));// 用户名
    dataSource.setPassword(propertyResolver.getProperty("password"));// 密码
    dataSource.setDriverClassName(propertyResolver.getProperty("driver-class-name"));
    dataSource.setInitialSize(2);
    dataSource.setMaxActive(20);
    dataSource.setMinIdle(0);
    dataSource.setMaxWait(60000);
    dataSource.setValidationQuery("SELECT 1");
    dataSource.setTestOnBorrow(false);
    dataSource.setTestWhileIdle(true);
    dataSource.setPoolPreparedStatements(false);
    return dataSource;
}