记录一下在项目中用纯 YML(application.yml 或者 application.properties)文件、Java 代码配置 Bean 和注解三种方式配置 Alibaba Druid 用于监控或者查看 SQL 状况:
1. 纯配置文件 .yml 或者 .properties
(1)pom.xml 添加相关依赖
<!-- SPRINGBOOT WEB -->
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<!-- SPRINGBOOT DRUID -->
<dependency>
<groupId>com.alibaba</groupId>
<artifactId>druid-spring-boot-starter</artifactId>
<version>1.1.10</version>
</dependency>
<!-- SPRINGBOOT JDBC -->
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-jdbc</artifactId>
</dependency>
<!-- MYSQL -->
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<scope>${mysql-connector-java.version}</scope>
</dependency>
<!-- LOG4J -->
<dependency>
<groupId>log4j</groupId>
<artifactId>log4j</artifactId>
<version>1.2.16</version>
<scope>compile</scope>
</dependency>
(2)配置application.yml 或者 application.properties 文件,本次配置文件为application.yml
spring:
# 数据源配置
datasource:
type: com.alibaba.druid.pool.DruidDataSource # MYSQL 5 驱动:com.mysql.jdbc.Driver,MYSQL 6+ 驱动:com.mysql.cj.jdbc.Driver
driver-class-name: com.mysql.cj.jdbc.Driver
url: jdbc:mysql://127.0.0.1:3306/test?autoReconnect=true&useUnicode=true&characterEncoding=utf8&zeroDateTimeBehavior=CONVERT_TO_NULL&useSSL=false&serverTimezone=GMT%2B8
username: root
password: 123456
# 连接池配置
druid:
# 初始化大小,最小,最大
initial-size: 5
min-idle: 5
max-active: 20
# 配置获取连接等待超时的时间
max-wait: 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,单位毫秒
time-between-eviction-runs-millis: 60000
# 配置一个连接在池中最小生存时间
min-evictable-idle-time-millis: 300000
validation-query: SELECT 1 FROM sys_user
test-while-idle: true
test-on-borrow: false
test-on-return: false
# 打开 PSCache,并且指定每个连接上 PSCache 的大小
pool-prepared-statements: true
max-pool-prepared-statement-per-connection-size: 20
# 配置监控统计拦截的 Filter,去掉后监控界面 SQL 无法统计,wall 用于防火墙
filters: stat,wall,log4j
# 通过 connection-properties 属性打开 mergeSql 功能;慢 SQL 记录
connection-properties: druid.stat.mergeSql\=true;druid.stat.slowSqlMillis\=5000
# 配置 DruidStatFilter
web-stat-filter:
enabled: true
url-pattern: /*
exclusions: .js,*.gif,*.jpg,*.bmp,*.png,*.css,*.ico,/druid/*
# 配置 DruidStatViewServlet
stat-view-servlet:
url-pattern: /druid/*
# IP 白名单,没有配置或者为空,则允许所有访问
allow: 127.0.0.1
# IP 黑名单,若白名单也存在,则优先使用
deny: 192.168.31.253
# 禁用 HTML 中 Reset All 按钮
reset-enable: false
# 登录用户名/密码
login-username: root
login-password: 123
(3)启动 SpringBoot 项目访问地址http://localhost:8080/druid/login.html进行登录,若出现一下界面则配置成功
2.Java 代码配置 Bean
(1)pom.xml 依赖
<dependency>
<groupId>com.alibaba</groupId>
<artifactId>druid</artifactId>
<version>1.1.10</version>
</dependency>
(2)在配置文件 application.yml 中添加 Druid 配置
spring:
datasource:
type: com.alibaba.druid.pool.DruidDataSource
# 数据源的其他配置
initialSize: 5
minIdle: 5
maxActive: 20
maxWait: 60000
timeBetweenEvictionRunsMillis: 60000
minEvictableIdleTimeMillis: 300000
validationQuery: SELECT 1 FROM DUAL
testWhileIdle: true
testOnBorrow: false
testOnReturn: false
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
filters: stat,wall,log4j
maxPoolPreparedStatementPerConnectionSize: 20
useGlobalDataSourceStat: true
connectionProperties: druid.stat.mergeSql=true;druid.stat.slowSqlMillis=500
(3)添加 DruidConfig.java 配置文件
import javax.servlet.Filter;
import javax.servlet.Servlet;
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;
@Configuration
public class DruidConfig {
@Bean
// 将所有前缀为spring.datasource下的配置项都加载DataSource中
@ConfigurationProperties(prefix = "spring.datasource")
public DataSource druidDataSource() {
return new DruidDataSource();
}
@Bean
public ServletRegistrationBean<Servlet> druidServlet() {
// 进行 druid 监控的配置处理
ServletRegistrationBean<Servlet> srb = new ServletRegistrationBean<>(new StatViewServlet(), "/druid/**");
// 白名单
srb.addInitParameter("allow", "127.0.0.1");
// 黑名单
srb.addInitParameter("deny", "192.168.31.253");
// 用户名
srb.addInitParameter("loginUsername", "root");
// 密码
srb.addInitParameter("loginPassword", "root");
// 是否可以重置数据源
srb.addInitParameter("resetEnable", "false");
return srb;
}
@Bean
public FilterRegistrationBean<Filter> filterRegistrationBean() {
FilterRegistrationBean<Filter> frb = new FilterRegistrationBean<>();
frb.setFilter(new WebStatFilter());
// 所有请求进行监控处理
frb.addUrlPatterns("/*");
// 排除名单
frb.addInitParameter("exclusions", "*.js,*.gif,*.jpg,*.css,/druid/*");
return frb;
}
}
(4)启动 SpringBoot 项目访问地址http://localhost:8080/druid/login.html进行查看登录
3.注解
(1)pom.xml 文件中添加 Druid 依赖(同方式二)
(2)配置文件添加信息(同方式二)
(3)配置 WebServlet
import javax.servlet.annotation.WebInitParam;
import javax.servlet.annotation.WebServlet;
import com.alibaba.druid.support.http.StatViewServlet;
@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="192.168.16.111"),// IP黑名单 (存在共同时,deny优先于allow)
@WebInitParam(name="loginUsername",value="admin"),// 用户名
@WebInitParam(name="loginPassword",value="admin"),// 密码
@WebInitParam(name="resetEnable",value="false")// 禁用HTML页面上的“Reset All”功能
})
public class DruidServlet extends StatViewServlet {
private static final long serialVersionUID = 1L;
}
(4)配置 WebFilter
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 DruidFilter extends WebStatFilter {
}
(5)配置启动文件SpringBootApplication 用于扫描我们配置的类
添加 @ServletComponentScan 注解进行扫描
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.boot.web.servlet.ServletComponentScan;
@SpringBootApplication
@ServletComponentScan("com.uy.servlet")
public class SpringBootApplication{
public static void main(String[] args) {
SpringApplication.run(SpringBootApplication.class, args); } }
(6)启动 SpringBoot 项目访问地址http://localhost:8080/druid/login.html进行查看登录
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