spring boot 加载配置文件 properties / json

阳光穿透心脏的1/2处 2022-12-18 14:00 216阅读 0赞

### demo.properties ###

#### 配置文件 ####

main
    	|_ java
    	|_ resources
    		|_ property
    			|_ demo.properties

demo.desc=spring boot property config of properties file
    demo.babbys[0].name=Tom
    demo.babbys[0].age=2
    demo.babbys[0].address=苏州
    demo.babbys[1].name=Lily
    demo.babbys[1].age=5
    demo.babbys[1].address=杭州

#### 实体对象 ####

import lombok.Data;
    
    @Data
    public class Babby { 
    	private String name;
    	private Integer age;
    	private String address;
    }

#### 配置 ####

import lombok.Data;
    import org.springframework.boot.context.properties.ConfigurationProperties;
    import org.springframework.context.annotation.Configuration;
    import org.springframework.context.annotation.PropertySource;
    
    import java.util.List;
    
    @Data
    @Configuration
    @PropertySource("classpath:property/demo.properties")
    @ConfigurationProperties(prefix = "demo")
    public class Demo { 
    	private String desc;
        private List<Babby> babbys;
    }

#### 使用 ####

@Autowired
    private Demo demo;

--------------------

### demo.json ###

#### 配置文件 ####

main
    	|_ java
    	|_ resources
    		|_ property
    			|_ demo.json

{ 
    	"desc": "spring boot property config of json file",
    	"babbys": [{ 
    		"name": "Tom",
    		"age": 2,
    		"address": "苏州"
    	},{ 
    		"name": "Lily",
    		"age": 5,
    		"address": "杭州"
    	}]
    }

#### 实体对象 ####

import lombok.Data;
    
    @Data
    public class Demo { 
    	private String desc;
        private List<Babby> babbys;
    }

import lombok.Data;
    
    @Data
    public class Babby { 
    	private String name;
    	private Integer age;
    	private String address;
    }

#### 配置 ####

import com.fasterxml.jackson.databind.ObjectMapper;
    import org.springframework.context.annotation.Bean;
    import org.springframework.context.annotation.Configuration;
    import org.springframework.util.ResourceUtils;
    
    @Configuration
    public class JsonFileConfig { 
    
        @Bean
        public Demo demo() throws IOException { 
        	Resource resource = new ClassPathResource("properties/demo.json");
            InputStream inputStream = resource.getInputStream();
            return new ObjectMapper().readValue(inputStream, Demo.class);
        }
    
    }

#### 使用 ####

@Autowired
    private Demo demo;