Spring Boot使用自定义的properties

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本文介绍如何在Spring Boot中配置并使用自定义的属性文件，包括不同版本间的变化及解决方案，如通过@ConfigurationProperties进行属性绑定。

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继续在application.properties中添加

wisely2.name=wyf2  
wisely2.gender=male2 
定义配置类
 @ConfigurationProperties(prefix = "wisely2")  
 public class Wisely2Settings {  
     private String name;  
     private String gender;  
     public String getName() {  
         return name;  
     }  
     public void setName(String name) {  
         this.name = name;  
   }  
   public String getGender() {  
       return gender;  
   }  
   public void setGender(String gender) {  
       this.gender = gender;  
   }  
}

若新用新的配置文件
1.5之前

建一个wisely.properties
wisely.name=wangyunfei
wisely.gender=male

@ConfigurationProperties(prefix = "wisely",locations = "classpath:config/wisely.properties")  
 public class WiselySettings {  
     private String name;  
     private String gender;  
     public String getName() {  
         return name;  
     }  
     public void setName(String name) {  
         this.name = name;  
   }  
   public String getGender() {  
       return gender;  
   }  
   public void setGender(String gender) {  
       this.gender = gender;  
   }  

}  

最后注意在spring Boot入口类加上@EnableConfigurationProperties
@SpringBootApplication  
 @EnableConfigurationProperties({WiselySettings.class,Wisely2Settings.class})  
 public class DemoApplication {  

     public static void main(String[] args) {  
         SpringApplication.run(DemoApplication.class, args);  
     }  
 }

1.5版本之后
在spring boot（版本1.5.1.RELEASE）项目中，当准备映射自定义的配置文件属性到类中的时候，发现原本的@ConfigurationProperties注解已将location属性移除，因此导致无法正常给配置类的属性赋值(spring boot这么做其实也有他的道理，具体可参考https://github.com/spring-projects/spring-boot/issues/6726)

在@EnableConfigurationProperties取消激活自定义的配置类（重要）
在配置类中采用@Component的方式注册为组件，然后使用@PropertySource来指定自定义的资源目录
代码

package demo1;

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;

/**
 * Created by LM on //
 */
@Component
@ConfigurationProperties(prefix = "wisely")
@PropertySource(value = "classpath:/wisely.properties")
public class WiselySettings {
    @Value("${wisely.name}")
    private String name;
    @Value("${wisely.gender}")
    private String gender;

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public String getGender() {
        return gender;
    }

    public void setGender(String gender) {
        this.gender = gender;
    }

}

package demo1;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.boot.context.properties.EnableConfigurationProperties;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

/**
 * Created by LM on 2017/8/6.
 */
@SpringBootApplication
public class App {

    public static void main(String[] args) {
        SpringApplication.run(App.class, args);
    }
}