springboot屬性動態配置

配置文件存放位置

springboot默認會讀取這個名字的文件，推薦命名（application.properties）
application.properties

jdbc.driverClassName=com.mysql.cj.jdbc.Driver
jdbc.url=jdbc:mysql://192.168.28.217:3306/yimocha?characterEncoding=utf8&useSSL=false&serverTimezone=Asia/Shanghai&rewriteBatchedStatements=true
jdbc.username=root
jdbc.password=root

springboot屬性動態方式一：

動態的配置類

package top.yimocha.config;

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

/**
 * @Author yimocha
 * @Version 1.0
 * springBoot 屬性動態方式一
 * 公有屬性動態
 **/
@ConfigurationProperties(prefix = "jdbc")
@Data
public class JdbcConfigProperties {
    private String url;
    private String driverClassName;
    private String username;
    private String password;
}

使用類

package top.yimocha.config;

import com.alibaba.druid.pool.DruidDataSource;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.boot.context.properties.ConfigurationProperties;
import org.springframework.boot.context.properties.EnableConfigurationProperties;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.context.annotation.PropertySource;

import javax.sql.DataSource;

/**
 * @Author yimocha
 * @Version 1.0
 * 
 **/
@Configuration
@EnableConfigurationProperties(JdbcConfigProperties.class)
public class JdbcConfig {

   @Bean
   public DataSource dataSource(JdbcConfigProperties properties) {
       DruidDataSource druidDataSource = new DruidDataSource();
        druidDataSource.setPassword(properties.getPassword());
       	druidDataSource.setUsername(properties.getUsername());
        druidDataSource.setUrl(properties.getUrl());
        druidDataSource.setDriverClassName(properties.getDriverClassName());
        return druidDataSource;
    }

}

這種方式適合配置全局屬性動態，需要在整個應用使用

springboot屬性動態方式二：

使用類

package top.yimocha.config;

import com.alibaba.druid.pool.DruidDataSource;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.boot.context.properties.ConfigurationProperties;
import org.springframework.boot.context.properties.EnableConfigurationProperties;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.context.annotation.PropertySource;

import javax.sql.DataSource;

/**
 * @Author yimocha
 * @Date 2019/10/28 18:29
 * @Version 1.0
 * 屬性動態java 的屬性動態方式
 **/
@Configuration
public class JdbcConfig {

    @ConfigurationProperties(prefix = "jdbc")
    @Bean
    public DataSource dataSource() {
        return new DruidDataSource();
    }
}

只在本類使用，不涉及整個程序的互用