Spring Boot集成Druid数据库连接池

<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>

# 数据库访问配置，此处使用postgres为例。# 主数据源，默认的spring.datasource.type=com.alibaba.druid.pool.DruidDataSourcespring.datasource.driver-class-name=org.postgresql.Driverspring.datasource.url=jdbc:postgresql://192.168.1.9/jianshudbspring.datasource.username=postgresspring.datasource.password=yourpassword# 下面为连接池的补充设置，应用到上面所有数据源中# 初始化大小，最小，最大spring.datasource.initialSize=5spring.datasource.minIdle=5spring.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# Oracle请使用select 1 from dualspring.datasource.validationQuery=SELECT 'x'spring.datasource.testWhileIdle=truespring.datasource.testOnBorrow=falsespring.datasource.testOnReturn=false# 打开PSCache，并且指定每个连接上PSCache的大小 spring.datasource.poolPreparedStatements=truespring.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,slf4j# 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# 合并多个DruidDataSource的监控数据#spring.datasource.useGlobalDataSourceStat=true

@Configurationpublic 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");// 用户名  initParameters.put("loginPassword", "admin");// 密码  initParameters.put("resetEnable", "false");// 禁用HTML页面上的“Reset All”功能  initParameters.put("allow", ""); // IP白名单 (没有配置或者为空，则允许所有访问)  //initParameters.put("deny", "192.168.20.38");// IP黑名单 (存在共同时，deny优先于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; }}

@RestControllerpublic 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() ? null : list.get(0);  }}