本文共 2630 字，大约阅读时间需要 8 分钟。

项目目录

1.pom.xml

   
   	
    
     4.0.0
    	
    		
     
      org.springframework.boot
     		
     
      spring-boot-starter-parent
     		
     
      2.0.3.RELEASE
     		
      
     	
    	
    
     com.wo
    	
    
     springboot-first
    	
    
     0.0.1-SNAPSHOT
    	
    
     springboot-first
    	
    
     Demo project for Spring Boot
    	
    		
     
      1.8
     	
       
    	
    		
     			
      
       org.springframework.boot
      			
      
       spring-boot-starter-web
      		
     		
     			
      
       org.springframework.boot
      			
      
       spring-boot-starter-test
      			
      
       test
      		
     		
     		
     			
      
       org.springframework.boot
      			
      
       spring-boot-devtools
      		
     	
    	
    		
     			
      				
       
        org.springframework.boot
       				
       
        spring-boot-maven-plugin
       			
      		
     	
    
   

2.TestTwoController

@RestController@RequestMapping("/two")public class TestTwoController {
   //    @Value("${class.name}")//    public String name;   @Value(("${class.student.name}"))    public String userName;    @Value(("${class.student.age}"))    public String age;    @Value(("${class.student.sex}"))    public String sex;    @Autowired    public Student student;    @RequestMapping("/first")    public String first(){
           return "hello"+student;    }}

3.application.yml;

server: port: 8089class:  student:    name: 王    age: 18    sex: 男  teacher:    name: 教师    age: 18    sex: 女

4.application.properties

#server.port=8088#class.name=2004

配置文件先执行yml，最后执行properties，如果配置相同，后置覆盖前者。

5.实体类

@ConfigurationProperties(prefix = "class.student")@Componentpublic class Student {
       private String name;    private Integer age;    private String sex;    public String getName() {
           return name;    }    public void setName(String name) {
           this.name = name;    }    public Integer getAge() {
           return age;    }    public void setAge(Integer age) {
           this.age = age;    }    public String getSex() {
           return sex;    }    public void setSex(String sex) {
           this.sex = sex;    }    @Override    public String toString() {
           return "Student{" +                "name='" + name + '\'' +                ", age=" + age +                ", sex='" + sex + '\'' +                '}';    }

6.测试类

@RunWith(SpringRunner.class)@SpringBootTestpublic class SpringbootFirstApplicationTests {
   	@Autowired	TestController testController;	@Test	public void contextLoads() {
   		String first = testController.first();		System.out.println(first);	}}

转载地址：http://fcezi.baihongyu.com/