若是你沒有接觸過Spring Boot , 能夠看個人Spring Boot的系列文章: 點擊這裏php
idea 2019.1css
mavenjava
Spring Boot 2.1.5mysql
jdk 1.8git
Win 10github
...web
使用 idea 自動化建立Spring Boot項目,這裏再也不贅述了, 不過須要注意的是, 咱們須要把Mysql驅動勾選上:spring
須要其餘依賴, 能夠本身勾選;sql
完整的pom文件:apache
<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>2.1.5.RELEASE</version>
<relativePath/> <!-- lookup parent from repository -->
</parent>
<groupId>com.carson</groupId>
<artifactId>spring-boot-06-data-jdbc</artifactId>
<version>0.0.1-SNAPSHOT</version>
<name>spring-boot-06-data-jdbc</name>
<description>Demo project for Spring Boot</description>
<properties>
<java.version>1.8</java.version>
</properties>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-jdbc</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<scope>runtime</scope>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
</dependency>
<dependency>
<groupId>log4j</groupId>
<artifactId>log4j</artifactId>
<version>1.2.17</version>
</dependency>
<dependency>
<groupId>com.alibaba</groupId>
<artifactId>druid</artifactId>
<version>1.1.16</version>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
</plugins>
</build>
</project>
複製代碼
記得把 druid 鏈接池添加上, 而且加上 log4j 的依賴, 不加的話等下會報錯
而後個人配置文件選擇 yml 後綴的:
spring:
datasource:
password: root
username: root
url: jdbc:mysql://localhost:3306/ssm?serverTimezone=UTC
driver-class-name: com.mysql.cj.jdbc.Driver
# 指定鏈接池類型
type: com.alibaba.druid.pool.DruidDataSource
# ------------分割線---------------------------
# 這下面的東西先不要添加到你的配置文件裏,由於不會生效
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
# 配置監控統計攔截的filters,去掉後監控界面sql沒法統計,'wall'用於防火牆
filters: stat,wall,log4j
maxPoolPreparedStatementPerConnectionSize: 20
useGlobalDataSourceStat: true
connectionProperties: druid.stat.mergeSql=true;druid.stat.slowSqlMillis=500
複製代碼
從分割線如下的配置,是不會生效的, 因此咱們等下須要特殊配置一下,
不過讓咱們先測試一下咱們的鏈接池 是否爲 Druid 鏈接池,
打開咱們test包下的測試類, 我這裏放上個人完整代碼:
package com.carson.springboot;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.test.context.SpringBootTest;
import org.springframework.test.context.junit4.SpringRunner;
import javax.lang.model.element.VariableElement;
import javax.sql.DataSource;
import java.sql.Connection;
import java.sql.SQLException;
@RunWith(SpringRunner.class)
@SpringBootTest
public class SpringBoot06DataJdbcApplicationTests {
@Autowired
DataSource dataSource;
@Test
public void contextLoads() throws SQLException {
System.out.println(dataSource.getClass());
Connection connection = dataSource.getConnection();
System.out.println(connection);
connection.close();
}
}
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運行此測試你將會看到控制檯輸出的鏈接池類型:
正是咱們須要的鏈接池類型
還記得剛纔說的不生效的那些配置嗎? 如今讓咱們來設置一下;
首先建立一個config配置類:
package com.carson.springboot.config;
import com.alibaba.druid.pool.DruidDataSource;
import org.springframework.boot.context.properties.ConfigurationProperties;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import javax.sql.DataSource;
@Configuration
public class DruidConfig {
@ConfigurationProperties(prefix = "spring.datasource")
@Bean
public DataSource druid() {
return new DruidDataSource();
}
}
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@ConfigurationProperties: 前綴, 表示帶這些前綴的配置生效
而後在測試類打個斷點,debug運行一下:
結果:
能夠看到屬性是正確的
依然是剛纔的 DruidConfig 配置類,咱們來添加如下方法:
@Bean
public ServletRegistrationBean statViewServlet() {
ServletRegistrationBean bean = new ServletRegistrationBean (new StatViewServlet(), "/druid/*");
Map<String, String> initParams = new HashMap<>();
// 帳號,
initParams.put("loginUsername", "admin");
// 密碼,
initParams.put("loginPassword", "123456");
// 容許登陸的ip(爲空 就是全部都容許)
initParams.put("allow", "");
// 而後是不容許的ip地址
initParams.put("deny", "192.123.11.11");
// 設置初始化參數
bean.setInitParameters(initParams);
return bean;
}
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這些參數是從哪裏來的呢? 就是下面:
// 2)配置一個監控的 filter
@Bean
public FilterRegistrationBean webStatFilter() {
FilterRegistrationBean bean = new FilterRegistrationBean();
bean.setFilter(new WebStatFilter());
Map<String, String> initParams = new HashMap<>();
// 不攔截那些屬性
initParams.put("exclusions","*.js,*.css,/druid/*");
// 設置初始化參數
bean.setInitParameters(initParams);
// 默認攔截全部
bean.setUrlPatterns(Arrays.asList("/*"));
return bean;
}
複製代碼
設置好這個,咱們能夠啓動Spring Boot的主類, 而後訪問 德魯伊(Druid)監視器: http://localhost:8080/druid
這個路徑是druid默認的路徑, 你會看到一個登陸頁面:
密碼就是咱們剛纔設置的 admin 和 123456
查看效果:
爲了查看如下咱們的 SQL監控 的效果, 咱們來寫一個 controller :
package com.carson.springboot.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;
import java.util.List;
import java.util.Map;
@Controller
public class HelloController {
@Autowired
JdbcTemplate jdbcTemplate;
@ResponseBody
@GetMapping
public Map<String, Object> map() {
List<Map<String, Object>> list = jdbcTemplate.queryForList("select * from user ");
return list.get(0);
}
}
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而且向網頁發送 query 請求:
而後查看 SQL 監控:
END~~