【SpringBoot】类中获取使用自定义配置变量

小咪咪 2022-12-22 11:25 188阅读 0赞

### 文章目录 ###

*  效果图
 *  application.properties
 *  法1、直接绑定@Value()
 *  法2、使用对象配置类

# 效果图 #

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80MzQ2OTY4MA_size_16_color_FFFFFF_t_70_pic_center]

# application.properties #

classroom.id=3
    classroom.name=zhangsan

# 法1、直接绑定@Value() #

PropertiesController

package com.bennyrhys.com.shop;
    
    import org.springframework.beans.factory.annotation.Value;
    import org.springframework.web.bind.annotation.GetMapping;
    import org.springframework.web.bind.annotation.RestController;
    
    /** * 类中获取使用自定义配置变量 */
    @RestController
    public class PropertiesController { 
        /** * 法1 @Value * 缺点：${classroom.id}获取配置文件内容容易写错 * 解决：利用对象类配置 */
        @Value("${classroom.id}")
        private Integer id;
        @Value("${classroom.name}")
        private String name;
    
        @GetMapping("/info")
        public String info() { 
            return "id: " + id + "name: " + name;
        }
    }

# 法2、使用对象配置类 #

ClassRoomConfig  
注意配置类的前缀匹配和 配置文件对应

@Component
    @ConfigurationProperties(prefix = "classroom")
    public class ClassRoomConfig { 
        Integer id;
        String name;
        // get set

OppController

package com.bennyrhys.com.shop;
    
    import org.springframework.beans.factory.annotation.Autowired;
    import org.springframework.web.bind.annotation.GetMapping;
    import org.springframework.web.bind.annotation.RestController;
    
    @RestController
    public class OppController { 
        @Autowired
        ClassRoomConfig classRoomConfig;
    
        @GetMapping("/info2")
        public String info2() { 
            return "id: " + classRoomConfig.id + "name: " + classRoomConfig.name;
        }
    }

[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80MzQ2OTY4MA_size_16_color_FFFFFF_t_70_pic_center]: /images/20221120/0dfd80f0013a4dbdb1106893f91a97d9.png