SpringBoot整合Druid數(shù)據(jù)源過程詳解

更新時間：2019年12月02日 10:26:44 作者：Amy清風(fēng)

這篇文章主要介紹了SpringBoot整合Druid數(shù)據(jù)源過程詳解,文中通過示例代碼介紹的非常詳細，對大家的學(xué)習(xí)或者工作具有一定的參考學(xué)習(xí)價值,需要的朋友可以參考下

1.數(shù)據(jù)庫結(jié)構(gòu)

2.項目結(jié)構(gòu)

3.pom.xml文件

<dependencies>
  <dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-jdbc</artifactId>
  </dependency>
  <dependency>
    <groupId>mysql</groupId>
    <artifactId>mysql-connector-java</artifactId>
    <scope>runtime</scope>
  </dependency>
 
  <!--引入druid數(shù)據(jù)源 -->
  <!-- https://mvnrepository.com/artifact/com.alibaba/druid -->
  <dependency>
    <groupId>com.alibaba</groupId>
    <artifactId>druid</artifactId>
    <version>1.1.8</version>
  </dependency>
 
  <!-- https://mvnrepository.com/artifact/log4j/log4j -->
  <!-- 如果 不加入這依賴    配置監(jiān)控統(tǒng)計攔截的filters時  這個會報錯 filters: stat,wall,log4j  -->
  <dependency>
    <groupId>log4j</groupId>
    <artifactId>log4j</artifactId>
    <version>1.2.17</version>
  </dependency>
 
  <dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-web</artifactId>
  </dependency>
 
 
  <dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-test</artifactId>
    <scope>test</scope>
  </dependency>
</dependencies>
 
<build>
  <plugins>
    <plugin>
      <groupId>org.springframework.boot</groupId>
      <artifactId>spring-boot-maven-plugin</artifactId>
    </plugin>
  </plugins>
</build>

4.application.yml配置文件

spring:
 datasource:
  username: root
  password: wangqing
  url: jdbc:mysql://localhost:3306/test?useUnicode=true&characterEncoding=utf-8&serverTimezone=Asia/Shanghai
  driver-class-name: com.mysql.jdbc.Driver
  type: com.alibaba.druid.pool.DruidDataSource
 
 
 #  數(shù)據(jù)源其他配置
  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
#  配置監(jiān)控統(tǒng)計攔截的filters，去掉后監(jiān)控界面sql無法統(tǒng)計，'wall'用于防火墻
  filters: stat,wall,log4j
  maxPoolPreparedStatementPerConnectionSize: 20
  useGlobalDataSourceStat: true
  connectionProperties: druid.stat.mergeSql=true;druid.stat.slowSqlMillis=500
  # 合并多個DruidDataSource的監(jiān)控數(shù)據(jù)
  #useGlobalDataSourceStat: true
   
mybatis:
 # 指定全局配置文件位置
 #config-location: classpath:mybatis/mybatis-config.xml
 # 指定sql映射文件位置
 mapper-locations: classpath:mapper/*.xml      #如src/main/resources下的mappers文件下的TUserMapper.xml
 
#  schema:
#   - classpath:sql/department.sql     #根據(jù)department.sql 的sql語句創(chuàng)建表
#   - classpath:sql/employee.sql

5.創(chuàng)建一個DruidConfig的配置類，實例化Druid Datasource

package com.qingfeng.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.util.Arrays;
import java.util.HashMap;
import java.util.Map;
 
@Configuration
public class DruidConfig {
　　　//指定加載appliction.yml文件里面的spring.datasource開頭的
　　　// DruidDataSource類里面的屬性與appliction.yml文件里面的spring.datasource開頭的對應(yīng)映射
  @ConfigurationProperties(prefix = "spring.datasource")
  @Bean
  public DataSource druid(){
    return new DruidDataSource();
  }
 
  //配置Druid的監(jiān)控
  //1、配置一個管理后臺的Servlet
  @Bean
  public ServletRegistrationBean statViewServlet(){
    ServletRegistrationBean bean = new ServletRegistrationBean(new StatViewServlet(), "/druid/*");
    Map<String,String> initParams = new HashMap<>();
 
    initParams.put("loginUsername","admin");
    initParams.put("loginPassword","123456");
    initParams.put("allow","");//默認就是允許所有訪問
    initParams.put("deny","");
 
    bean.setInitParameters(initParams);
    return bean;
  }
 
 
  //2、配置一個web監(jiān)控的filter
  @Bean
  public FilterRegistrationBean webStatFilter(){
    FilterRegistrationBean bean = new FilterRegistrationBean();
    bean.setFilter(new WebStatFilter());
    Map<String,String> initParams = new HashMap<>();
    initParams.put("exclusions","*.js,*.css,/druid/*");
    bean.setInitParameters(initParams);
    bean.setUrlPatterns(Arrays.asList("/*"));
    return bean;
  }
}

6.創(chuàng)建一個UserController類測試

package com.qingfeng.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 UserController {
 
  @Autowired
  JdbcTemplate jdbcTemplate;
  @ResponseBody
  @GetMapping("/query")
  public Map<String,Object> map(){
    List<Map<String, Object>> list = jdbcTemplate.queryForList("select * FROM user");
    return list.get(0);
  }
}

7.運行項目，通過瀏覽器訪問 http://localhost:8080/query

8.我們DruidConfig類里配置的下面代碼可以幫我們實現(xiàn)監(jiān)控

//配置Druid的監(jiān)控
  //1、配置一個管理后臺的Servlet
  @Bean
  public ServletRegistrationBean statViewServlet(){
    ServletRegistrationBean bean = new ServletRegistrationBean(new StatViewServlet(), "/druid/*");
    Map<String,String> initParams = new HashMap<>();
 
    initParams.put("loginUsername","admin");
    initParams.put("loginPassword","123456");
    initParams.put("allow","");//默認就是允許所有訪問
    initParams.put("deny","");
 
    bean.setInitParameters(initParams);
    return bean;
  }

9.我們啟動項目，打開網(wǎng)址：http://localhost:8080/druid/login.html 可以通過登錄，查看druid數(shù)據(jù)源狀態(tài)監(jiān)控