SpringBoot2 java配置方式 Configuration和PropertySource结合读取配置文件

jdbcconfig.java

configuration是配置文件

propertysource 引入配置文件

value读取配置文件内容

package cn.itcast.config;

import com.alibaba.druid.pool.druiddatasource;
import org.springframework.beans.factory.annotation.value;
import org.springframework.context.annotation.bean;
import org.springframework.context.annotation.configuration;
import org.springframework.context.annotation.propertysource;

import javax.sql.datasource;

//配置文件注解
@configuration
@propertysource("classpath:jdbc.properties")
public class jdbcconfig {
    @value("${jdbc.url}")
    private string seturl;
    @value("${jdbc.driverclassname}")
    private string driver;
    @value("${jdbc.username}")
    private string username;
    @value("${jdbc.password}")
    private string password;
    @bean
    public datasource datasource(){
        druiddatasource druiddatasource = new druiddatasource();
        druiddatasource.setdriverclassname(seturl);
        druiddatasource.seturl(driver);
        druiddatasource.setusername(username);
        druiddatasource.setpassword(password);
        return druiddatasource;
    }
}

　　jdbc.properties

jdbc.driverclassname=com.mysql.jdbc.driver
jdbc.url=jdbc:mysql://127.0.0.1:3306/leyou
jdbc.username=root
jdbc.password=