springboot_03

1.yam文件书写格式

1.1字面值的表示方式

1.2数组的表示方法

2.yml文件的读取

 代码实际

随便写个测试

@RestController
@RequestMapping("/books")
public class helloController {

    @Value("${country}")
    public String country;
    @Value("${a.b}")
    public String age;
    @Value("${shuzu[0].name1}")
    public String name;

    @GetMapping
    public String getByid(){
        System.out.println("country------>"+country);
        System.out.println("age------>"+age);
        System.out.println("shuzu------>"+name);
        return "{'module':'user save'}";
    };

}

 yml文件写法

server:
  port: 81

a:
  b: 18

country: chain

shuzu:
  -
    name1: zhangsan
    age: 18
  -
    name2: lisi
    age: 19


主流的写法与读取数据

yam文件中的数据

datasouce:
  driver: com.mysal.jdbc.Driver
  url: jdbc:mysql://localhost/springboot db
  username: root
  password: root123


定义一个类存放数据 

@Component
//springboot管理
@ConfigurationProperties("datasouce")
//指定加载数据
public class MyDataSource {
    private String driver;
    private String url;
    private String username;
    private String password;

    @Override
    public String toString() {
        return "MyDataSource{" +
                "driver='" + driver + '\'' +
                ", url='" + url + '\'' +
                ", username='" + username + '\'' +
                ", password='" + password + '\'' +
                '}';
    }

    public String getDriver() {
        return driver;
    }

    public void setDriver(String driver) {
        this.driver = driver;
    }

    public String getUrl() {
        return url;
    }

    public void setUrl(String url) {
        this.url = url;
    }

    public String getUsername() {
        return username;
    }

    public void setUsername(String username) {
        this.username = username;
    }

    public String getPassword() {
        return password;
    }

    public void setPassword(String password) {
        this.password = password;
    }
}

加载运行一下

@RestController
@RequestMapping("/books")
public class helloController {

    @Value("${country}")
    public String country;
    @Value("${a.b}")
    public String age;
    @Value("${shuzu[0].name1}")
    public String name;

    @Autowired
    //自动装配
    private MyDataSource myDataSource;


    @GetMapping
    public String getByid(){
        System.out.println("country------>"+country);
        System.out.println("age------>"+age);
        System.out.println("shuzu------>"+name);
        System.out.println("myDataSource------>"+myDataSource);

        return "{'module':'user save'}";
    };

}

成功