SpringBoot Druid整合，SpringBoot 集成Druid

SpringBoot Druid整合，SpringBoot 集成Druid

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©Copyright 蕃薯耀 2018年4月8日

http://www.cnblogs.com/fanshuyao/

源代码下载见：http://fanshuyao.iteye.com/blog/2415353

一、SpringBoot引入Druid的依赖包

<dependency>
  <groupId>mysql</groupId>
  <artifactId>mysql-connector-java</artifactId>
  <scope>runtime</scope>
</dependency>

<dependency>
  <groupId>com.alibaba</groupId>
  <artifactId>druid</artifactId>
  <version>1.1.9</version>
</dependency>

二、设置配置文件application.properties

spring.datasource.url=jdbc:mysql://192.168.1.166:3306/study
spring.datasource.driver-class-name=com.mysql.jdbc.Driver
spring.datasource.username=root
spring.datasource.password=root
spring.datasource.type=com.alibaba.druid.pool.DruidDataSource
#spring.datasource.schema=

#数据源其他配置，需要增加Druid的配置类（不然不生效）
#配置见：com.lqy.springboot.datasource.druid.DruidConfig
spring.datasource.initialSize=5
spring.datasource.minIdle=5
spring.datasource.maxActive=20
spring.datasource.maxWait=60000
spring.datasource.timeBetweenEvictionRunsMillis=60000
spring.datasource.minEvictableIdleTimeMillis=300000
spring.datasource.validationQuery=SELECT 1 FROM DUAL
spring.datasource.testWhileIdle=true
spring.datasource.testOnBorrow=false
spring.datasource.testOnReturn=false
spring.datasource.poolPreparedStatements=true
#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.maxPoolPreparedStatementPerConnectionSize=20
spring.datasource.useGlobalDataSourceStat=true
spring.datasource.connectionProperties=druid.stat.mergeSql=true;druid.stat.slowSqlMillis=500

三、增加Druid自定义配置类

为什么要增加呢？

因为SpringBoot本身提供的配置只是部分的数据库连接配置，很多Druid需要的属性配置是没有的，如：

spring.datasource.initialSize

 这个属性，SpringBoot是没有的，只有Druid才有，所以需要增加相应的配置类，自动注入。

DruidConfig 类：

import java.util.Arrays;
import java.util.HashMap;
import java.util.Map;

import javax.sql.DataSource;

import org.springframework.boot.context.properties.ConfigurationProperties;
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 com.alibaba.druid.pool.DruidDataSource;
import com.alibaba.druid.support.http.StatViewServlet;
import com.alibaba.druid.support.http.WebStatFilter;

/**
 * 导入druid数据源，扩展相关的配置属性
 *
 */
@Configuration
public class DruidConfig {

    /**
     * 配置Druid的属性，和DataSource进行绑定，前缀设置为：spring.datasource
     * 不配置的话，很多初始化的属性是没有绑定的
     * @return
     */
    @Bean
    @ConfigurationProperties(prefix="spring.datasource")
    public DataSource druid() {
        return new DruidDataSource();
    }

    /**
     * 配置druid监控
     * 配置一个管理后台的servlet
     * 访问地址：http://localhost:8080/druid/
     * @return
     */
    @Bean
    public ServletRegistrationBean statViewServlet() {
        ServletRegistrationBean bean = new ServletRegistrationBean(new StatViewServlet(), "/druid/*");
        Map<String, String> initParameters = new HashMap<String, String>();
        initParameters.put("loginUsername", "admin");//属性见：com.alibaba.druid.support.http.ResourceServlet
        initParameters.put("loginPassword", "123456");
        initParameters.put("allow", "");//默认允许所有
        initParameters.put("deny", "");
        bean.setInitParameters(initParameters);
        return bean;
    }

    /**
     * 配置一个web监控的filter
     * @return
     */
    @Bean
    public FilterRegistrationBean webStatFilter() {
        FilterRegistrationBean filterBean = new FilterRegistrationBean();
        filterBean.setFilter(new WebStatFilter());
        filterBean.setUrlPatterns(Arrays.asList("/*"));

        Map<String, String> initParameters = new HashMap<String, String>();
        initParameters.put("exclusions", "*.js,*.css,/druid/*");//属性见：com.alibaba.druid.support.http.WebStatFilter
        filterBean.setInitParameters(initParameters);

        return filterBean;
    }


}

 四、启动项目，测试数据源连接：

import java.sql.Connection;
import java.sql.SQLException;

import javax.sql.DataSource;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

@RestController
public class DataSourceController {

    @Autowired
    private DataSource dataSource;

    @RequestMapping("/dataSource")
    public String dataSource() {
        try {
            System.out.println("dataSource = "+dataSource);
            Connection conn = dataSource.getConnection();
            System.out.println("conn = "+conn);
            return "success";
        } catch (SQLException e) {
            e.printStackTrace();
        }
        return "end.";
    }


}

五、查看Druid的监控

浏览器打开：http://localhost:8080/druid

登录的账号密码在DruidConfig类配置有

（如果你觉得文章对你有帮助，欢迎捐赠，^_^，谢谢！） 

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©Copyright 蕃薯耀 2018年4月8日

http://www.cnblogs.com/fanshuyao/