SpringBoot加载配置文件

方式一、

import org.springframework.boot.context.properties.ConfigurationProperties;
import org.springframework.context.annotation.Configuration;
import org.springframework.context.annotation.PropertySource;

@Configuration
@PropertySource("classpath:config/my.prop")
@ConfigurationProperties(prefix = "aaa")
public class PropConf {

    private String a;
    private String b;
    private String c;

    public String getA() {return a;}
    public void setA(String a) {this.a = a;}
    public String getB() {return b;}
    public void setB(String b) {this.b = b;}
    public String getC() {return c;}
    public void setC(String c) {this.c = c;}

    public void show(){
        System.out.println("a --- > " + a);
        System.out.println("b --- > " + b);
        System.out.println("c --- > " + c);
    }
}

方式二、

import org.springframework.beans.factory.annotation.Value;
import org.springframework.stereotype.Component;

@Component
public class MyConf {

    @Value("${string.port}")     private int intPort;
    @Value("${string.port}")     private  String stringPort;
    @Value("${db.link.url}")     private String dbUrl;
    @Value("${db.link.driver}")  private String dbDriver;
    @Value("${db.link.username}")private String dbUsername;
    @Value("${db.link.password}")private String dbPassword;

    public void show(){
        System.out.println("===========================================");
        System.out.println("intPort :   " + (intPort + 1111));
        System.out.println("stringPort :   " + (stringPort + 1111));
        System.out.println("string :   " + dbUrl);
        System.out.println("string :   " + dbDriver);
        System.out.println("string :   " + dbUsername);
        System.out.println("string :   " + dbPassword);
        System.out.println("===========================================");
    }
}

方式三、

import org.springframework.boot.context.properties.ConfigurationProperties;
import org.springframework.context.annotation.Configuration;
import org.springframework.context.annotation.PropertySource;

@Configuration
@PropertySource("classpath:config/my.prop")
@ConfigurationProperties(prefix = "aaa")
public class PropConf {

    private String a;
    private String b;
    private String c;

    public void setA(String a) {  this.a = a;  }
    public void setB(String b) { this.b = b;  }
    public void setC(String c) {  this.c = c; }

    public void show(){
        System.out.println("a --- > " + a);
        System.out.println("b --- > " + b);
        System.out.println("c --- > " + c);
    }
}