SpringBoot获取数据

灰太狼 2023-10-05 17:38 10阅读 0赞

配置文件中数据：

name: abc
    
    #对象
    persion:
      name: lele
      age: 29
    
    #对象行内写法
    persion2:{
        name: zhangsan,age: 20}
    
    #数组
    address:
       - beijing
       - shanghai
    
    #数组行内写法
    address2: [beijing,shanghai]
    
    
    msg1: 'hello \n world' #不会识别转译字符，原样输出
    msg2: "hello \n world"  #会识别转义字符

方式一：@Value

@RestController
    public class HelloController {
        
    
        @Value("${name}")
        private String name;
        @Value("${persion.name}")
        private String name2;
        @Value("${persion.age}")
        private int age;
        @Value("${msg2}")
        private String address;
    
        @RequestMapping("/test")
        public String test() {
        
            System.out.println("name = " + name);
            System.out.println("name2 = " + name2);
            System.out.println("address = " + address);
            return name + name2 + address;
        }
       }

方式二:Enviroment

@RestController
    public class HelloController {
        
    
        @Autowired
        private Environment env;
    
    
        @RequestMapping("/hello2")
        public String hello2() {
        
    
            System.out.println("name = " + env.getProperty("name"));
            System.out.println("name2 = " + env.getProperty("persion.name"));
            System.out.println("name = " + env.getProperty("msg2"));
            
           return "hello2";
        }
    }

方式三：@ConfigurationProperties  
①实体类

import org.springframework.boot.context.properties.ConfigurationProperties;
    import org.springframework.stereotype.Component;
    
    @Component
    @ConfigurationProperties(prefix = "person")
    public class Person {
        
    
        private String name;
        private int age;
        private String[] address;
    
        public String getName() {
        
            return name;
        }
    
        public void setName(String name) {
        
            this.name = name;
        }
    
        public int getAge() {
        
            return age;
        }
    
        public void setAge(int age) {
        
            this.age = age;
        }
    
        public String[] getAddress() {
        
            return address;
        }
    
        public void setAddress(String[] address) {
        
            this.address = address;
        }
    
        @Override
        public String toString() {
        
            return "Person{" +
                    "name='" + name + '\'' +
                    ", age=" + age +
                    '}';
        }
    }

②测试

@RestController
    public class HelloController {
        
    
        @Autowired
        private Persion persion;
    
    
        @RequestMapping("/test3")
        public String test3() {
        
            System.out.println(persion.getName());
            System.out.println(persion.getAge());
             String[] address = person.getAddress();
            for (String s : address) {
        
                System.out.println(s);
            }
            return "test3";
        }
    }