一起来学SpringBoot（十三）Druid数据源

Druid是Java语言中最好的数据库连接池。Druid能够提供强大的监控和扩展功能。考虑到可能是数据库连接的问题，所以我打算引入其他的数据池，引入数据池的时候找来找去，比较了当前两个最火的数据池，druid和HikariCP，比来比去选了阿里的druid，虽然spring boot默认不支持druid，而是支持HikariCP,而且HikariCP的性能更好，但是阿里功能多，界面友好方便，性价比更高！

配置

首先呢引入依赖

        <dependency>
            <groupId>com.alibaba</groupId>
            <artifactId>druid</artifactId>
            <version>1.1.10</version>
        </dependency>

然后呢在yml中配置

druid:
  driver-class: com.mysql.jdbc.Driver
  min-idle: 1
  password: 123456
  test-on-borrow: true
  timeBetweenEvictionRunsMillis: 9000
  max-active: 20
  initial-size: 1
  url: jdbc:mysql://192.168.8.100:3306/test?useUnicode=true&characterEncoding=utf8
  username: root

自定义配置有助于更好的维护

再然后呢是或者配置类

package com.maoxs.conf;

import org.springframework.boot.context.properties.ConfigurationProperties;

@ConfigurationProperties(prefix = "druid")
public class DruidProperties {
   
   
    private String url;
    private String username;
    private String password;
    private String driverClass;
    private int maxActive;
    private int minIdle;
    private int initialSize;
    private boolean testOnBorrow;

    public String getUrl() {
   
   
        return url;
    }

    public void setUrl(String url) {
   
   
        this.url = url;
    }

    public String getUsername() {
   
   
        return username;
    }

    public void setUsername(String username) {
   
   
        this.username = username;
    }

    public String getPassword() {
   
   
        return password;
    }

    public void setPassword(String password) {
   
   
        this.password = password;
    }

    public String getDriverClass() {
   
   
        return driverClass;
    }

    public void setDriverClass(String driverClass) {
   
   
        this.driverClass = driverClass;
    }

    public int getMaxActive() {
   
   
        return maxActive;
    }

    public void setMaxActive(int maxActive) {
   
   
        this.maxActive = maxActive;
    }

    public int getMinIdle() {
   
   
        return minIdle;
    }

    public void setMinIdle(int minIdle) {
   
   
        this.minIdle = minIdle;
    }

    public int getInitialSize() {
   
   
        return initialSize;
    }

    public void setInitialSize(int initialSize) {
   
   
        this.initialSize = initialSize;
    }

    public boolean isTestOnBorrow() {
   
   
        return testOnBorrow;
    }

    public void setTestOnBorrow(boolean testOnBorrow) {
   
   
        this.testOnBorrow = testOnBorrow;
    }
}

再然后呢就是注入我们的数据源

package com.maoxs.conf;

import com.alibaba.druid.pool.DruidDataSource;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.autoconfigure.AutoConfigureBefore;
import org.springframework.boot.autoconfigure.condition.