Spring boot优雅配置文件变量注入

痛定思痛。 2023-02-17 03:38 43阅读 0赞

# Spring boot优雅配置文件变量注入 #

## 参数说明 ##

*  @PropertySource: 配置扫描的文件地址
    
     *  `classpath:` 默认为`resource`目录
 *  @ConfigurationProperties: 批量注入配置字段
    
     *  `prefix` 配置需要注入的配置参数前缀
     *  `ignoreUnknownFields` 是否忽略未知字段
 *  @Configuration 标记这个类让`Spring`扫描到

## java代码 ##

package com.smart.life.userserver.common;
    
    import lombok.AllArgsConstructor;
    import lombok.Data;
    import lombok.NoArgsConstructor;
    import org.springframework.boot.context.properties.ConfigurationProperties;
    import org.springframework.context.annotation.Configuration;
    import org.springframework.context.annotation.PropertySource;
    
    /** * @Author: WanG * @Date: 2020/6/11 16:59 * @version: v1.0 * @description: 系统常量配置 */
    @Data
    @NoArgsConstructor
    @AllArgsConstructor
    @PropertySource("classpath:smart-life.properties")
    @Configuration
    @ConfigurationProperties(prefix = "my.constant",
    		ignoreUnknownFields = false)
    public class SmartLifeConstant { 
    
    	private PetClass pet;
    	private User user;
    
    	@Data
    	public static class User { 
    		private String name;
    		private String gender;
    
    	}
    
    	@Data
    	public static class PetClass { 
    		private String name;
    		private String gender;
    
    	}
    }

## 配置文件 ##

### smart-life.properties ###

my.constant.user.name=名字
    my.constant.user.gender=性别
    my.constant.pet.type=猫咪
    my.constant.pet.gender=猫咪性别

## 效果展示 ##

### 控制层代码示例 ###

@PostMapping("test")
    	public ServerReturnResult test(){ 
    		SmartLifeConstant bean = SpringUtils.getBean(SmartLifeConstant.class);
    		log.info("用户-->name:{}({}), 宠物 --> name:{}({})",
    				bean.getUser().getName(),
    				bean.getUser().getGender(),
    				bean.getPet().getName(),
    				bean.getPet().getGender());
    		return ServerReturnResult.success();
    	}

### 控制台效果 ###

![image-20200611221219272.png][]

## 中文乱码问题 ##

### IDEA ###

1.  Global Encoding --> UTF-8
2.  Project Encoding --> UTF-8
3.  打钩 Transparent native-to-ascii conversion
4.  配置目录(`resources`)加入到`Path`中

![image-20200611221320123.png][]

[image-20200611221219272.png]: https://raw.githubusercontent.com/TWanGT/pic/master/image-20200611221219272.png
[image-20200611221320123.png]: https://raw.githubusercontent.com/TWanGT/pic/master/image-20200611221320123.png