一篇搞定SpringBoot整合JDBC以及配置Druid数据源难道不香么？

冷不防 2022-12-17 10:54 15阅读 0赞

### 整合JDBC ###

--------------------

只需要两个依赖，在pom.xml文件中导入：

<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>

application.yml文件配置数据库连接：

spring:
      datasource:
        username: jektong
        password: 123456
        url: jdbc:mysql://localhost:3306/jektong?serverTimezone=UTC&useUnicode=true&characterEncoding=utf-8
        driver-class-name: com.mysql.jdbc.Driver

找个测试类测试一下：

@SpringBootTest
    class StudyVideoApplicationTests { 
        @Autowired
        private DataSource dataSource;
        @Test
        void contextLoads() throws SQLException { 
            Connection connection = dataSource.getConnection();
            System.out.println(connection);
        }
    }

输出类似这样的:说明配置没有问题

HikariProxyConnection@1957530885 wrapping com.mysql.cj.jdbc.ConnectionImpl@676ff3b0

### 整合Druid ###

使用阿里的Druid主要就是因为Druid的监控系统有点强大  
主要依赖

<dependency>
    	<groupId>com.alibaba</groupId>
    	<artifactId>druid</artifactId>
    	<version>1.1.21</version>
    </dependency>

Druid数据源的配置：这些配置拿来即用

spring:
      datasource:
        driver-class-name: com.mysql.jdbc.Driver
        url: jdbc:mysql://localhost:3306/jektong?serverTimezone=UTC&useUnicode=true&characterEncoding=utf-8
        username: jektong
        password: 123456
        # 指定数据源
        type: com.alibaba.druid.pool.DruidDataSource
        # 初始化连接个数
        initialSize: 5
        # 最小连接池
        minIdle: 5
        # 最大连接池
        maxActive: 20
        # 连接等待超时的等待时间
        maxWait: 60000
        # 多久检测一次
        timeBetweenEvictionRunsMillis: 60000
        minEvictableIdleTimeMillis: 300000
        validationQuery: SELECT 1 FROM DUAL
        testWhileIdle: true
        testOnBorrow: false
        testOnReturn: false
        filters: stat,wall,log4j
        logSlowSql: true
        poolPreparedStatements: true
        maxPoolPreparedStatementPerConnectionSize: 20
        connectionProperties: druid.statmergeSql=true;druid.stat.slowSqlMillis=5000

建立配置类DruidCofig.java配置文件

package com.jektong.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;
    /** * @author jektong * @Date 2020/10/5 16:02 */
    @Configuration
    public class DruidConfig { 
    
        @ConfigurationProperties(prefix = "spring.datasource")
        @Bean
        public DataSource druidDataSource() { 
            return new DruidDataSource();
        }
    
        // 后台监控
        @Bean
        public ServletRegistrationBean statViewServlet() { 
            // 现在要进行druid监控的配置处理操作
            ServletRegistrationBean servletRegistrationBean = new ServletRegistrationBean(
                    new StatViewServlet(), "/druid/*");
            // 白名单,多个用逗号分割， 如果allow没有配置或者为空，则允许所有访问
            servletRegistrationBean.addInitParameter("allow", "127.0.0.1,172.29.32.54");
            // 黑名单,多个用逗号分割 (共同存在时，deny优先于allow)
            servletRegistrationBean.addInitParameter("deny", "192.168.1.110");
            // 控制台管理用户名
            servletRegistrationBean.addInitParameter("loginUsername", "admin");
            // 控制台管理密码
            servletRegistrationBean.addInitParameter("loginPassword", "eju1314");
            // 是否可以重置数据源，禁用HTML页面上的“Reset All”功能
            servletRegistrationBean.addInitParameter("resetEnable", "false");
            return servletRegistrationBean;
        }
    
        @Bean
        public FilterRegistrationBean filterRegistrationBean() { 
            FilterRegistrationBean filterRegistrationBean = new FilterRegistrationBean();
            filterRegistrationBean.setFilter(new WebStatFilter());
            //所有请求进行监控处理
            filterRegistrationBean.addUrlPatterns("/*");
            //添加不需要忽略的格式信息
            filterRegistrationBean.addInitParameter("exclusions", "*.js,*.gif,*.jpg,*.css,/druid/*");
            return filterRegistrationBean;
        }
    }

输入网址：  
http://localhost:8080/druid/login.html  
就会进入Druid后台监控登录的页面,输入密码就登录成功了  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQxODU3OTU1_size_16_color_FFFFFF_t_70_pic_center]  
只要触发了数据库语句就会有相应的记录了！！！  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQxODU3OTU1_size_16_color_FFFFFF_t_70_pic_center 1]

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