Spring Boot 使用 Druid 和监控配置

转:http://412887952-qq-com.iteye.com/blog/2292362,http://blog.csdn.net/catoop/article/details/50925337

Spring Boot默认的数据源是：org.apache.tomcat.jdbc.pool.DataSource

整体步骤：

(1)    ——   Druid简单介绍，具体看官网；

(2)     —— 在pom.xml配置druid依赖包；

(3)    ——  配置application.properties加入数据库源类型等参数；

(4)     —— 编写druid servlet和filter提供监控页面访问；

(5)     —— 输入地址进行测试；

1、添加Maven依赖 (或jar包)

<dependency>
<groupId>com.alibaba</groupId>
<artifactId>druid</artifactId>
<version>1.0.18</version>
</dependency>

application.properties

# 数据库访问配置
# 主数据源，默认的
spring.datasource.type=com.alibaba.druid.pool.DruidDataSource
spring.datasource.driver-class-name=com.mysql.jdbc.Driver
spring.datasource.url=jdbc:mysql://localhost:3306/test
spring.datasource.username=root
spring.datasource.password=123456

# 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=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
# 打开PSCache，并且指定每个连接上PSCache的大小
spring.datasource.poolPreparedStatements=true
spring.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,log4j
# 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

3、配置监控统计功能

配置Servlet

如下是在SpringBoot项目中基于注解的配置，如果是web.xml配置，按规则配置即可。

package com.example.servlet;

import javax.servlet.annotation.WebInitParam;
import javax.servlet.annotation.WebServlet;

/**
* druid数据源状态监控
*
* @author Administrator
*
*/

@WebServlet(urlPatterns = "/druid/*", initParams = {
@WebInitParam(name = "allow", value = "192.168.16.110,127.0.0.1"), // IP白名单// (没有配置或者为空，则允许所有访问)
@WebInitParam(name = "deny", value = "192.168.1.111"), // IP黑名单// (存在共同时，deny优先于allow)
@WebInitParam(name = "loginUsername", value = "root"), // 用户名
@WebInitParam(name = "loginPassword", value = "root"), // 密码
@WebInitParam(name = "resetEnable", value = "false")// 禁用HTML页面上的“Reset// All”功能
})
public class DruidStatViewServlet extends com.alibaba.druid.support.http.StatViewServlet{

/**
*
*/
private static final long serialVersionUID = -2419291060366082741L;

}

配置Filter

package com.example.servlet;

import javax.servlet.annotation.WebFilter;
import javax.servlet.annotation.WebInitParam;

import com.alibaba.druid.support.http.WebStatFilter;

@WebFilter(filterName="druidWebStatFilter",urlPatterns="/*",
initParams={
@WebInitParam(name="exclusions",value="*.js,*.gif,*.jpg,*.bmp,*.png,*.css,*.ico,/druid/*")// 忽略资源
})
public class DruidStatFilter extends WebStatFilter{

}

最后在Application.java类上加上注解：@ServletComponentScan是的spring能够扫描到我们自己编写的servlet和filter。

注意不要忘记在Application.java 上添加 @ServletComponentScan 注解，不然就是404了。

package com.example;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.boot.web.servlet.ServletComponentScan;

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

/*@Bean
public ServletRegistrationBean servletRegistrationBean() {
return new ServletRegistrationBean(new DruidStatViewServlet(), "/druid/*");// ServletName默认值为首字母小写，即myServlet
}*/
/*
* @Autowired private Environment env;
*
* @Bean public DataSource dataSource() { DruidDataSource dataSource = new
* DruidDataSource();
* dataSource.setUrl(env.getProperty("spring.datasource.url"));
* dataSource.setUsername(env.getProperty("spring.datasource.username"));//
* 用户名
* dataSource.setPassword(env.getProperty("spring.datasource.password"));//
* 密码 dataSource.setDriverClassName(env.getProperty(
* "spring.datasource.driver-class-name")); dataSource.setInitialSize(2);
* dataSource.setMaxActive(20); dataSource.setMinIdle(0);
* dataSource.setMaxWait(60000); dataSource.setValidationQuery("SELECT 1");
* dataSource.setTestOnBorrow(false); dataSource.setTestWhileIdle(true);
* dataSource.setPoolPreparedStatements(false); return dataSource; }
*/
}

然后启动项目后访问 http://127.0.0.1:8080/druid/index.html 即可查看数据源及SQL统计等。

需要注意的是：spring.datasource.type旧的spring
boot版本是不能识别的。（后话：更新于2016年8月20日，很抱歉的是新版本也废弃了这个属性，配置完之后启动就会报错，所以现在知道的情况是1.2版本不支持，1.3版本支持，1.4版本不支持，

1.4版本可以新建类去实现EnvironmentAware接口和@Configuration@EnableTransactionManagement的方式注入druid数据源

package com.example.configuration;

import java.sql.SQLException;

import javax.sql.DataSource;

import org.springframework.boot.bind.RelaxedPropertyResolver;
import org.springframework.context.EnvironmentAware;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.core.env.Environment;
import org.springframework.transaction.annotation.EnableTransactionManagement;

import com.alibaba.druid.pool.DruidDataSource;

@Configuration
@EnableTransactionManagement
public class DataBaseConfiguration implements EnvironmentAware {

private RelaxedPropertyResolver propertyResolver;

@Override
public void setEnvironment(Environment env) {
this.propertyResolver = new RelaxedPropertyResolver(env, "spring.datasource.");
}

@Bean(destroyMethod = "close", initMethod = "init")
public DataSource writeDataSource() throws SQLException {
System.out.println("注入druid！！！");

DruidDataSource dataSource = new DruidDataSource();
dataSource.setUrl(propertyResolver.getProperty("url"));
dataSource.setUsername(propertyResolver.getProperty("username"));//用户名
dataSource.setPassword(propertyResolver.getProperty("password"));//密码
dataSource.setDriverClassName(propertyResolver.getProperty("driver-class-name"));
dataSource.setInitialSize(Integer.parseInt(propertyResolver.getProperty("initialSize")));
dataSource.setMaxActive(Integer.parseInt(propertyResolver.getProperty("maxActive")));
dataSource.setMinIdle(Integer.parseInt(propertyResolver.getProperty("minIdle")));
dataSource.setMaxWait(Integer.parseInt(propertyResolver.getProperty("maxWait")));
dataSource.setTimeBetweenEvictionRunsMillis(Integer.parseInt(propertyResolver.getProperty("timeBetweenEvictionRunsMillis")));
dataSource.setMinEvictableIdleTimeMillis(Integer.parseInt(propertyResolver.getProperty("minEvictableIdleTimeMillis")));
dataSource.setValidationQuery(propertyResolver.getProperty("validationQuery"));
dataSource.setTestOnBorrow(Boolean.getBoolean(propertyResolver.getProperty("testOnBorrow")));
dataSource.setTestWhileIdle(Boolean.getBoolean(propertyResolver.getProperty("testWhileIdle")));
dataSource.setTestOnReturn(Boolean.getBoolean(propertyResolver.getProperty("testOnReturn")));
dataSource.setPoolPreparedStatements(Boolean.getBoolean(propertyResolver.getProperty("poolPreparedStatements")));
dataSource.setMaxPoolPreparedStatementPerConnectionSize(Integer.parseInt(propertyResolver.getProperty("maxPoolPreparedStatementPerConnectionSize")));
//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
dataSource.setFilters(propertyResolver.getProperty("filters"));
return dataSource;
}

}

application.properties

########################################################
###datasource
########################################################
# 数据库访问配置
# 主数据源，默认的
#spring.datasource.type=com.alibaba.druid.pool.DruidDataSource
spring.datasource.driver-class-name=com.mysql.jdbc.Driver
spring.datasource.url=jdbc:mysql://localhost:3306/test
spring.datasource.username=root
spring.datasource.password=root

# 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=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
# 打开PSCache，并且指定每个连接上PSCache的大小
spring.datasource.poolPreparedStatements=true
spring.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,log4j
# 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