Spring Boot 使用Druid详解
Druid是Java语言中最好的数据库连接池,并且能够提供强大的监控和扩展功能,下面来说明如何在 SpringBoot" title="SpringBoot">SpringBoot 中配置使用Druid。
步骤:
1. 在pom.xml中加载依赖
2. 在application.properties中加入数据源配置
3. 编写DruidConfiguration,通过@Bean注解的方式注入druid servlet和filter,以便提供监控页面访问
4. 浏览器访问
一、在pom.xml中加入依赖
<dependency>
<groupId>com.alibaba</groupId>
<artifactId>druid</artifactId>
<version>1.0.18</version>
</dependency>
二、在application.properties中加入数据源配置
################## server ################################
server.port=8080
################## datasource ################################
spring.datasource.url = jdbc:mysql://localhost:3306/spring
spring.datasource.username = root
spring.datasource.password = 123456
spring.datasource.driverClassName = com.mysql.jdbc.Driver
#使用Druid数据源
spring.datasource.type=com.alibaba.druid.pool.DruidDataSource
# 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 FROMDUAL
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
################ Java Persistence Api ###########################
# Specify the DBMS
spring.jpa.database = MYSQL
# Show or not log for each sql query
spring.jpa.show-sql = true
# Hibernate ddl auto (create, create-drop, update)
spring.jpa.hibernate.ddl-auto = update
#[org.hibernate.cfg.ImprovedNamingStrategy #org.hibernate.cfg.DefaultNamingStrategy]
spring.jpa.hibernate.naming-strategy = org.hibernate.cfg.ImprovedNamingStrategy
# stripped before adding them to the entity manager)
spring.jpa.properties.hibernate.dialect= org.hibernate.dialect.MySQL5Dialect
#暂时不用redis,所以none,spring.session.store-type=reids
spring.session.store-type=none
以上是我项目中的配置信息,大家只要关注datasource部分即可。
三、编写DruidConfiguration配置类,通过@Bean注解的方式注入druid servlet和filter,以便提供监控页面访问
package com.example.config;
import java.sql.SQLException;
import javax.sql.DataSource;
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 com.alibaba.druid.pool.DruidDataSource;
import com.alibaba.druid.support.http.StatViewServlet;
import com.alibaba.druid.support.http.WebStatFilter;
/**
* 配置druid数据源
*
*/
@Configuration
public class DruidConfiguration {
private Logger logger = LoggerFactory.getLogger(DruidConfiguration.class);
@Bean
public ServletRegistrationBean druidStatViewServlet() {
ServletRegistrationBean registrationBean = new ServletRegistrationBean(new StatViewServlet(), "/druid/*");
registrationBean.addInitParameter("allow", "127.0.0.1");
registrationBean.addInitParameter("deny", "192.168.31.234");
registrationBean.addInitParameter("loginUsername", "admin");
registrationBean.addInitParameter("loginPassword", "123456");
registrationBean.addInitParameter("resetEnable", "false");
return registrationBean;
}
@Bean
public FilterRegistrationBean druidWebStatViewFilter() {
FilterRegistrationBean registrationBean = new FilterRegistrationBean(new WebStatFilter());
registrationBean.addInitParameter("urlPatterns", "/*");
registrationBean.addInitParameter("exclusions", "*.js,*.gif,*.jpg,*.bmp,*.png,*.css,*.ico,/druid/*");
return registrationBean;
}
@Bean
public DataSource druidDataSource(@Value("${spring.datasource.url}") String url,
@Value("${spring.datasource.driverClassName}") String driver,
@Value("${spring.datasource.username}") String userName,
@Value("${spring.datasource.password}") String password,
@Value("${spring.datasource.maxActive}") int maxActive,
@Value("${spring.datasource.filters}") String filters,
@Value("${spring.datasource.initialSize}")
int initialSize,
@Value("${spring.datasource.minIdle}")
int minIdle,
@Value("${spring.datasource.maxWait}")
int maxWait,
@Value("${spring.datasource.timeBetweenEvictionRunsMillis}")
int timeBetweenEvictionRunsMillis,
@Value("${spring.datasource.minEvictableIdleTimeMillis}")
int minEvictableIdleTimeMillis,
@Value("${spring.datasource.validationQuery}")
String validationQuery,
@Value("${spring.datasource.testWhileIdle}")
boolean testWhileIdle,
@Value("${spring.datasource.testOnBorrow}")
boolean testOnBorrow,
@Value("${spring.datasource.testOnReturn}")
boolean testOnReturn,
@Value("${spring.datasource.poolPreparedStatements}")
boolean poolPreparedStatements,
@Value("${spring.datasource.maxPoolPreparedStatementPerConnectionSize}")
int maxPoolPreparedStatementPerConnectionSize,
@Value("${spring.datasource.connectionProperties}")
String connectionProperties,
@Value("${spring.datasource.useGlobalDataSourceStat}")
boolean useGlobalDataSourceStat
) {
DruidDataSource dataSource = new DruidDataSource();
/*数据源主要配置*/
dataSource.setUrl(url);
dataSource.setDriverClassName(driver);
dataSource.setUsername(userName);
dataSource.setPassword(password);
/*数据源补充配置*/
dataSource.setMaxActive(maxActive);
dataSource.setInitialSize(initialSize);
dataSource.setMinIdle(minIdle);
dataSource.setMaxWait(maxWait);
dataSource.setTimeBetweenEvictionRunsMillis(timeBetweenEvictionRunsMillis);
dataSource.setMinEvictableIdleTimeMillis(minEvictableIdleTimeMillis);
dataSource.setValidationQuery(validationQuery);
dataSource.setTestOnBorrow(testOnBorrow);
dataSource.setTestOnReturn(testOnReturn);
dataSource.setTestWhileIdle(testWhileIdle);
dataSource.setPoolPreparedStatements(poolPreparedStatements);
dataSource.setMaxPoolPreparedStatementPerConnectionSize(maxPoolPreparedStatementPerConnectionSize);
dataSource.setConnectionProperties(connectionProperties);
dataSource.setUseGlobalDataSourceStat(useGlobalDataSourceStat);
try {
dataSource.setFilters(filters);
logger.info("Druid数据源初始化设置成功......");
} catch (SQLException e) {
e.printStackTrace();
logger.info("Druid数据源filters设置失败......");
}
return dataSource;
}
}
四、浏览器访问
在浏览器中输入http://localhost:8080/druid/index.html,首次访问需要使用账号和密码登录
在数据源一栏中,所有加"*"标识的都不能为空,,尤其是filter类名,否则会看不到SQL监控数据。
五、查看SQL监控
执行删除某条记录后,查看SQL监控
到这里,我们就把druid配置成功了。
以上是 Spring Boot 使用Druid详解 的全部内容, 来源链接: utcz.com/z/340058.html