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druid 在spring 中的应用

1、pom文件中导入所需jar

<!-- alibaba的druid数据库连接池 -->
<dependency>
   <groupId>com.alibaba</groupId>
   <artifactId>druid</artifactId>
   <version>1.0.11</version>
</dependency>

2、application.properites下增加druid连接数据库配置信息

spring.datasource.url=jdbc:mysql://127.0.0.1:3306/tianjinb2b?useUnicode=true&characterEncoding=UTF-8
spring.datasource.username=root
spring.datasource.password=88888888
spring.datasource.driverClassName=com.mysql.jdbc.Driver        
## 数据库访问配置
spring.datasource.type=com.alibaba.druid.pool.DruidDataSource
spring.datasource.driver-class-name=com.mysql.jdbc.Driver
# 下面为连接池的补充设置，应用到上面所有数据源中
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
# 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
spring.datasource.logSlowSql=true

3、增加config文件用于读取配置文件中的相关信息

import com.alibaba.druid.pool.DruidDataSource;
import com.alibaba.druid.support.http.StatViewServlet;
import com.alibaba.druid.support.http.WebStatFilter;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.boot.web.servlet.FilterRegistrationBean;
import org.springframework.boot.web.servlet.ServletRegistrationBean;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;

import javax.sql.DataSource;
import java.sql.SQLException;

/**
* Created by arnold.zhu on 6/13/2017.
*/
@Configuration
public class DruidConfig {

   private Logger logger = LoggerFactory.getLogger(DruidConfig.class);

   @Value("${spring.datasource.url}")
   private String dbUrl;

   @Value("${spring.datasource.username}")
   private String username;

   @Value("${spring.datasource.password}")
   private String password;

   @Value("${spring.datasource.driver-class-name}")
   private String driverClassName;

   @Value("${spring.datasource.initialSize}")
   private int initialSize;

   @Value("${spring.datasource.minIdle}")
   private int minIdle;

   @Value("${spring.datasource.maxActive}")
   private int maxActive;

   @Value("${spring.datasource.maxWait}")
   private int maxWait;

   @Value("${spring.datasource.timeBetweenEvictionRunsMillis}")
   private int timeBetweenEvictionRunsMillis;

   @Value("${spring.datasource.minEvictableIdleTimeMillis}")
   private int minEvictableIdleTimeMillis;

   @Value("${spring.datasource.validationQuery}")
   private String validationQuery;

   @Value("${spring.datasource.testWhileIdle}")
   private boolean testWhileIdle;

   @Value("${spring.datasource.testOnBorrow}")
   private boolean testOnBorrow;

   @Value("${spring.datasource.testOnReturn}")
   private boolean testOnReturn;

   @Value("${spring.datasource.filters}")
   private String filters;

   @Value("${spring.datasource.logSlowSql}")
   private String logSlowSql;

   @Bean
   public ServletRegistrationBean druidServlet() {
       ServletRegistrationBean reg = new ServletRegistrationBean();
       reg.setServlet(new StatViewServlet());
       reg.addUrlMappings("/druid/*");
       reg.addInitParameter("loginUsername", username);
       reg.addInitParameter("loginPassword", password);
       reg.addInitParameter("logSlowSql", logSlowSql);
       return reg;
   }

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

   @Bean
   public DataSource druidDataSource() {
       DruidDataSource datasource = new DruidDataSource();
       datasource.setUrl(dbUrl);
       datasource.setUsername(username);
       datasource.setPassword(password);
       datasource.setDriverClassName(driverClassName);
       datasource.setInitialSize(initialSize);
       datasource.setMinIdle(minIdle);
       datasource.setMaxActive(maxActive);
       datasource.setMaxWait(maxWait);
       datasource.setTimeBetweenEvictionRunsMillis(timeBetweenEvictionRunsMillis);
       datasource.setMinEvictableIdleTimeMillis(minEvictableIdleTimeMillis);
       datasource.setValidationQuery(validationQuery);
       datasource.setTestWhileIdle(testWhileIdle);
       datasource.setTestOnBorrow(testOnBorrow);
       datasource.setTestOnReturn(testOnReturn);
       try {
           datasource.setFilters(filters);
       } catch (SQLException e) {
           logger.error("druid configuration initialization filter", e);
       }
       return datasource;
   }

}