Springboot读取application配置文件中的自定义配置的几种方式

1.@Value注解读取方式

application.yml自定义配置

读取配置类

package com.ruoyi.common.core.domain;

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

@Component
public class OpcserverConfig {
    
    


    @Value("${opcserver.ip}")
    private String ip;

    @Value("${opcserver.port}")
    private String port;

    public String getIp() {
    
    
        return ip;
    }

    public void setIp(String ip) {
    
    
        this.ip = ip;
    }

    public String getPort() {
    
    
        return port;
    }

    public void setPort(String port) {
    
    
        this.port = port;
    }
}

2.@ConfigurationProperties注解读取方式

读取配置类

package com.ruoyi.common.core.domain;

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

@Component
@ConfigurationProperties(prefix = "opcserver")
public class OpcserverConfig2 {
    
    


    private String ip;

    private String port;

    public String getIp() {
    
    
        return ip;
    }

    public void setIp(String ip) {
    
    
        this.ip = ip;
    }

    public String getPort() {
    
    
        return port;
    }

    public void setPort(String port) {
    
    
        this.port = port;
    }
}

读取指定文件

注意：1.在资源目录（resources）下创建2.@PropertySource不支持yml文件读取。

方式一：@PropertySource+@Value注解读取方式

package com.ruoyi.common.core.domain;

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

@Component
@PropertySource(value = "opcconfig.properties")
public class OpcConfig {
    
    


    @Value("${opc.ip}")
    private String ip;

    @Value("${opc.port}")
    private String port;

    public String getIp() {
    
    
        return ip;
    }

    public void setIp(String ip) {
    
    
        this.ip = ip;
    }

    public String getPort() {
    
    
        return port;
    }

    public void setPort(String port) {
    
    
        this.port = port;
    }
}

方式二：@PropertySource+@ConfigurationProperties注解读取方式

package com.ruoyi.common.core.domain;

import org.springframework.beans.factory.annotation.Value;
import org.springframework.boot.context.properties.ConfigurationProperties;
import org.springframework.context.annotation.PropertySource;
import org.springframework.stereotype.Component;

@Component
@ConfigurationProperties(prefix = "opc")
@PropertySource(value = {
    
    "opcconfig.properties"})
public class OpcConfig2 {
    
    


    @Value("${opcs.ip}")
    private String ip;

    @Value("${opc.port}")
    private String port;

    public String getIp() {
    
    
        return ip;
    }

    public void setIp(String ip) {
    
    
        this.ip = ip;
    }

    public String getPort() {
    
    
        return port;
    }

    public void setPort(String port) {
    
    
        this.port = port;
    }
}

三.Environment直接读取配置

    @Autowired
    private Environment env;
    
   	public String getOpcIp(){
    
    
      return env.getProperty("opc.ip");
    }