Druid是数据库连接池，它能够提供强大的监控和扩展功能。官方文档
Spring Boot整合第三方技术的两种方式：
- 自定义
- 找starter场景
1.自定义方式
使用自定义方式整合Druid
1.添加依赖
在pom.xml添加相关依赖
org.springframework.boot
spring-boot-starter-data-jdbc
mysql
mysql-connector-java
5.1.6
com.alibaba
druid
1.2.6
2.编写配置
application.properties
server.port=8080
spring.datasource.url=jdbc:mysql://localhost:3306/db_springtest?useUnicode=true&characterEncoding=utf8
spring.datasource.username=root
spring.datasource.password=123456
spring.datasource.driver-class-name=com.mysql.jdbc.Driver
配置Druid的监控页功能：
Druid内置提供了一个StatViewServlet用于展示Druid的统计信息。官方文档 - 配置StatViewServlet
这个StatViewServlet的用途包括：
- 提供监控信息展示的html页面
- 提供监控信息的JSON API
Druid内置提供一个StatFilter，用于统计监控信息。官方文档 - 配置_StatFilter
WebStatFilter用于采集web-jdbc关联监控的数据，如SQL监控、URI监控。官方文档 - 配置WebStatFilter
Druid提供了WallFilter，它是基于SQL语义分析来实现防御SQL注入攻击的。官方文档 - 配置 wallfilter
DataSourceConfig
package com.limi.springboottest2.config;
import com.alibaba.druid.pool.DruidDataSource;
import com.alibaba.druid.support.http.StatViewServlet;
import com.alibaba.druid.support.http.WebStatFilter;
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 javax.sql.DataSource;
import java.sql.SQLException;
import java.util.Arrays;
@Configuration
public class DataSourceConfig {
@Bean
@ConfigurationProperties("spring.datasource")//复用配置文件的数据源配置, 这样就不用写代码一个一个set了
public DataSource dataSource() throws SQLException {
DruidDataSource druidDataSource = new DruidDataSource();
//加入监控和防火墙功能功能
druidDataSource.setFilters("stat,wall");
return druidDataSource;
}
/**
* 配置 druid的监控页功能
* @return
*/
@Bean
public ServletRegistrationBean statViewServlet(){
StatViewServlet statViewServlet = new StatViewServlet();
ServletRegistrationBean registrationBean =
new ServletRegistrationBean<>(statViewServlet, "/druid/*");
//监控页账号密码：
registrationBean.addInitParameter("loginUsername","admin");
registrationBean.addInitParameter("loginPassword","123456");
return registrationBean;
}
/**
* WebStatFilter 用于采集web-jdbc关联监控的数据。
*/
@Bean
public FilterRegistrationBean webStatFilter(){
WebStatFilter webStatFilter = new WebStatFilter();
FilterRegistrationBean filterRegistrationBean = new FilterRegistrationBean<>(webStatFilter);
filterRegistrationBean.setUrlPatterns(Arrays.asList("/*"));
filterRegistrationBean.addInitParameter("exclusions","*.js,*.gif,*.jpg,*.png,*.css,*.ico,/druid/*");
return filterRegistrationBean;
}
}
3.测试
HelloController
package com.limi.springboottest2.controller;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.jdbc.core.JdbcTemplate;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.ResponseBody;
@Controller
public class HelloController {
@Autowired
private JdbcTemplate jdbcTemplate;
@ResponseBody
@GetMapping("/sql")
public String test1(){
String sql = "select count(*) from t_user";
Long i = jdbcTemplate.queryForObject(sql, Long.class);
return i.toString();
}
}
多次点击刷新进行访问
登录druid后台查看监控信息
账号admin, 密码123456
2.starter方式(推荐)
使用场景启动器整合druid, 效果和自定义方式一样, 但更加方便
1.添加依赖
在pom.xml添加相关依赖
org.springframework.boot
spring-boot-starter-data-jdbc
mysql
mysql-connector-java
5.1.6
com.alibaba
druid-spring-boot-starter
1.1.17
pom.xml完整内容如下
4.0.0 org.springframework.boot spring-boot-starter-parent 2.7.0 com.limi springboot-test2 0.0.1-SNAPSHOT springboot-test2 Demo project for Spring Boot 1.8 org.springframework.boot spring-boot-starter-web org.springframework.boot spring-boot-devtools runtime true org.projectlombok lombok true org.springframework.boot spring-boot-starter-test test org.springframework.boot spring-boot-configuration-processor true org.springframework.boot spring-boot-starter-data-jdbc mysql mysql-connector-java 5.1.6 com.alibaba druid-spring-boot-starter 1.1.17 org.springframework.boot spring-boot-maven-plugin org.projectlombok lombok org.springframework.boot spring-boot-maven-plugin org.springframework.boot spring-boot-configuration-processor
2.编写配置
application.properties
server.port=8080
spring.datasource.url=jdbc:mysql://localhost:3306/db_springtest?useUnicode=true&characterEncoding=utf8
spring.datasource.username=root
spring.datasource.password=123456
spring.datasource.driver-class-name=com.mysql.jdbc.Driver#监控SpringBean
spring.datasource.druid.aop-patterns=com.limi.springboottest2.*
# 底层开启功能，stat（sql监控），wall（防火墙）
spring.datasource.druid.filters=stat,wall# 配置监控页功能
spring.datasource.druid.stat-view-servlet.enabled=true
spring.datasource.druid.stat-view-servlet.login-username=admin
spring.datasource.druid.stat-view-servlet.login-password=123456
spring.datasource.druid.stat-view-servlet.reset-enable=false# 监控web
spring.datasource.druid.web-stat-filter.enabled=true
spring.datasource.druid.web-stat-filter.url-pattern=/*
spring.datasource.druid.web-stat-filter.exclusions='*.js,*.gif,*.jpg,*.png,*.css,*.ico,/druid/*'# 对上面filters里面的stat的详细配置
spring.datasource.druid.filter.stat.slow-sql-millis=1000
spring.datasource.druid.filter.stat.log-slow-sql=true
spring.datasource.druid.filter.stat.enabled=true
spring.datasource.druid.filter.wall.enabled=true
spring.datasource.druid.filter.wall.config.drop-table-allow=false
3.测试
HelloController
package com.limi.springboottest2.controller;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.jdbc.core.JdbcTemplate;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.ResponseBody;
@Controller
public class HelloController {
@Autowired
private JdbcTemplate jdbcTemplate;
@ResponseBody
@GetMapping("/sql")
public String test1(){
String sql = "select count(*) from t_user";
Long i = jdbcTemplate.queryForObject(sql, Long.class);
return i.toString();
}
}
多次点击刷新进行访问
登录druid后台查看监控信息
账号admin, 密码123456
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