Spring Boot使用Druid连接池的示例代码

  <!--starter-web 方便我们查看效果-->
  <dependency>
   <groupId>org.springframework.boot</groupId>
   <artifactId>spring-boot-starter-web</artifactId>
  </dependency>
  <!--使用Mybatis也可以，druid提供的只是连接池-->
  <dependency>
   <groupId>org.springframework.boot</groupId>
   <artifactId>spring-boot-starter-jdbc</artifactId>
  </dependency>

  <dependency>
   <groupId>com.alibaba</groupId>
   <artifactId>druid-spring-boot-starter</artifactId>
   <version>1.1.6</version>
  </dependency>

server:
 port: 9011
 
spring:
 datasource:
 type: com.alibaba.druid.pool.DruidDataSource
 driver-class-name: com.mysql.jdbc.Driver
 druid:
  initial-size: 5
  max-active: 10
  min-idle: 5
  max-wait: 60000
  pool-prepared-statements: true
  max-pool-prepared-statement-per-connection-size: 20
  validation-query: select 1
  validation-query-timeout: 60000
  test-on-borrow: false
  test-on-return: false
  test-while-idle: true
  time-between-eviction-runs-millis: 60000
  filter:
  stat:
   log-slow-sql: true
   db-type: mysql
   slow-sql-millis: 2000
  stat-view-servlet:
  login-username: druid
  login-password: druid
  allow: 127.0.0.1
  url-pattern: /druid/*
  username: root
  password: 123456
  url: jdbc:mysql://127.0.0.1:3306/test?characterEncoding=utf-8

@Configuration
public class DruidConfig {

 @Bean
 public JdbcTemplate jdbcTemplate(){
  return new JdbcTemplate(druidDataSource());
 }

 // ConfigurationProperties可以直接把应用配置的spring.datasource.druid属性开头的值注入到DruidDataSource中
 @ConfigurationProperties(prefix = "spring.datasource.druid")
 @Bean(initMethod = "init",destroyMethod = "close")
 public DruidDataSource druidDataSource(){
  DruidDataSource druidDataSource = new DruidDataSource();
  
  // 添加druid的监控过滤器，当前只演示监控的功能，因此只有一个过滤器，可以实现多个过滤器
  LinkedList<Filter> filtersList = new LinkedList();
  filtersList.add(filter());
  druidDataSource.setProxyFilters(filtersList);
  
  return druidDataSource;
 }

 @Bean
 public Filter filter(){
  StatFilter statFilter = new StatFilter();
  // SQL执行时间超过2s种的被判定为慢日志
  statFilter.setSlowSqlMillis(2000);
  //显示慢日志
  statFilter.setLogSlowSql(true);
  //合并SQL，有时，一些相同的慢日志过多影响阅读，开启合并功能
  statFilter.setMergeSql(true);
  return statFilter;
 }

 // 监控的面板
 @Bean
 public ServletRegistrationBean servletRegistrationBean(){
  // 注册自己的Sevlet
  return new ServletRegistrationBean(new StatViewServlet(),"/druid/*");
 }
}

@RestController
@SpringBootApplication
public class DaoApplication {
 public static void main(String[] args) {
  SpringApplication.run(DaoApplication.class,args);
 }

 @Autowired
 JdbcTemplate jdbcTemplate;

 @RequestMapping("/test")
 public List test(){
  final List<Integer> idList = new LinkedList<Integer>();
  jdbcTemplate.query("select * from sh_test1", new RowCallbackHandler() {
   @Override
   public void processRow(ResultSet rs) throws SQLException {
     idList.add(rs.getInt(1));
   }
  });

  return idList;
 }
}