# 自定义属性
boot.userName = yuxi

 @Value(value = "${boot.userName}")
 private String userName;

# 复杂属性
test.id=1
test.name=xiaoyuxixi
test.money=100000000

//需要注意这个属性是必须的
@ConfigurationProperties(prefix = "test")
public class Account {
  private int id;
  private String name;
  private double money;

  public int getId() {
    return id;
  }

  public void setId(int id) {
    this.id = id;
  }

  public String getName() {
    return name;
  }

  public void setName(String name) {
    this.name = name;
  }

  public double getMoney() {
    return money;
  }

  public void setMoney(double money) {
    this.money = money;
  }

  @Override
  public String toString() {
    return "Account{" +
        "id=" + id +
        ", name='" + name + '\'' +
        ", money=" + money +
        '}';
  }
}

@RestController
// 这个属性也是必须的
@EnableConfigurationProperties({Account.class})
public class HelloController {
  //自定义属性
  @Value(value = "${boot.userName}")
  private String userName;
  @Autowired
  private Account account;

  /**
   * 复杂 属性自定义
   *
   * @return
   */
  @RequestMapping("/hard")
  public Object getHardProperties() {

    return account;
  }

  /**
   * welcome spring boot
   *
   * @return
   */
  @RequestMapping(value = "/", method = RequestMethod.GET)
  public String index() {
    return "Greetings from Spring Boot! ";
  }

  /**
   * 简单 属性自定义
   *
   * @return
   */
  @RequestMapping("/user")
  public String getProperties() {
    System.out.println(userName);
    return userName;
  }
  
}

# 配置文件获取
lakala.id=1
lakala.name=xiaoyuxixi
lakala.money=100000000

@Configuration
@PropertySource(value = "classpath:test.properties")