使用SpringBoot如何實(shí)現(xiàn)集成Druid數(shù)據(jù)庫連接池

<parent>
  <groupId>org.springframework.boot</groupId>
  <artifactId>spring-boot-starter-parent</artifactId>
  <version>1.3.5.RELEASE</version>
</parent>

<properties>
  <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
  <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
  <java.version>1.8</java.version>
</properties>

<dependencies>
  <dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-web</artifactId>
  </dependency>
  <dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-jdbc</artifactId>
  </dependency>
  <dependency>
    <groupId>com.alibaba</groupId>
    <artifactId>druid</artifactId>
    <version>1.0.20</version>
  </dependency>
  <dependency>
    <groupId>org.postgresql</groupId>
    <artifactId>postgresql</artifactId>
    <scope>runtime</scope>
  </dependency>
</dependencies>

# 數(shù)據(jù)庫訪問配置，此處使用postgres為例。
# 主數(shù)據(jù)源，默認(rèn)的
spring.datasource.type=com.alibaba.druid.pool.DruidDataSource
spring.datasource.driver-class-name=org.postgresql.Driver
spring.datasource.url=jdbc:postgresql://192.168.1.9/jianshudb
spring.datasource.username=postgres
spring.datasource.password=yourpassword

# 下面為連接池的補(bǔ)充設(shè)置，應(yīng)用到上面所有數(shù)據(jù)源中
# 初始化大小，最小，最大
spring.datasource.initialSize=5
spring.datasource.minIdle=5
spring.datasource.maxActive=20
# 配置獲取連接等待超時(shí)的時(shí)間
spring.datasource.maxWait=60000
# 配置間隔多久才進(jìn)行一次檢測，檢測需要關(guān)閉的空閑連接，單位是毫秒 
spring.datasource.timeBetweenEvictionRunsMillis=60000
# 配置一個(gè)連接在池中最小生存的時(shí)間，單位是毫秒 
spring.datasource.minEvictableIdleTimeMillis=300000
# Oracle請使用select 1 from dual
spring.datasource.validationQuery=SELECT 'x'
spring.datasource.testWhileIdle=true
spring.datasource.testOnBorrow=false
spring.datasource.testOnReturn=false
# 打開PSCache，并且指定每個(gè)連接上PSCache的大小 
spring.datasource.poolPreparedStatements=true
spring.datasource.maxPoolPreparedStatementPerConnectionSize=20
# 配置監(jiān)控統(tǒng)計(jì)攔截的filters，去掉后監(jiān)控界面sql無法統(tǒng)計(jì)，'wall'用于防火墻 
spring.datasource.filters=stat,wall,slf4j
# 通過connectProperties屬性來打開mergeSql功能；慢SQL記錄
#spring.datasource.connectionProperties=druid.stat.mergeSql=true;druid.stat.slowSqlMillis=5000
# 合并多個(gè)DruidDataSource的監(jiān)控?cái)?shù)據(jù)
#spring.datasource.useGlobalDataSourceStat=true

@Configuration
public class DruidConfiguration {

 private static final Logger log = LoggerFactory.getLogger(DruidConfiguration.class);

 @Bean
 public ServletRegistrationBean druidServlet() {
  log.info("init Druid Servlet Configuration ");
  ServletRegistrationBean servletRegistrationBean = new ServletRegistrationBean();
  servletRegistrationBean.setServlet(new StatViewServlet());
  servletRegistrationBean.addUrlMappings("/druid/*");
  Map<String, String> initParameters = new HashMap<String, String>();
  initParameters.put("loginUsername", "admin");// 用戶名
  initParameters.put("loginPassword", "admin");// 密碼
  initParameters.put("resetEnable", "false");// 禁用HTML頁面上的“Reset All”功能
  initParameters.put("allow", ""); // IP白名單 (沒有配置或者為空，則允許所有訪問)
  //initParameters.put("deny", "192.168.20.38");// IP黑名單 (存在共同時(shí)，deny優(yōu)先于allow)
  servletRegistrationBean.setInitParameters(initParameters);
  return servletRegistrationBean;
 }

 @Bean
 public FilterRegistrationBean filterRegistrationBean() {
  FilterRegistrationBean filterRegistrationBean = new FilterRegistrationBean();
  filterRegistrationBean.setFilter(new WebStatFilter());
  filterRegistrationBean.addUrlPatterns("/*");
  filterRegistrationBean.addInitParameter("exclusions", "*.js,*.gif,*.jpg,*.png,*.css,*.ico,/druid/*");
  return filterRegistrationBean;
 }

}

@RestController
public class DemoController {

  @Autowired
  JdbcTemplate jdbcTemplate;

  @RequestMapping(value = "/hello.do", method = RequestMethod.GET)
  public String hello(@RequestParam(value = "id", required = true) Integer id) {
    String name = getNameById(id);
    return (name == null) ? "Hello World" : ("Hello " + name);
  }

  public String getNameById(Integer id) {
    String sql = "select username from t_user where id = ? ";
    List<String> list = jdbcTemplate.queryForList(sql, new Object[] {id}, String.class);
    return list.isEmpty() &#63; null : list.get(0);
  }

}