spring boot 中统一异常处理

基于 spring boot 对异常处理的不友好，现在通过其他的方式来统一处理异常

步骤一：自定义异常类

public class UserNotExistException extends RuntimeException{
    private static final long serialVersionUID = -1574716826948451793L;

    private String id;

    public UserNotExistException(String id){
        super("user not exist");
        this.id = id;
    }

    public String getId() {
        return id;
    }

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

步骤二：定义异常处理类

@ControllerAdvice
public class ControllerExceptionHandler {

    @ExceptionHandler(UserNotExistException.class)
    @ResponseBody
    @ResponseStatus(HttpStatus.INTERNAL_SERVER_ERROR)
    public Map<String, Object> handleUserNotExistsException(UserNotExistException e) {
        Map<String, Object> map = new HashMap<>();
        map.put("id", e.getId());
        map.put("message", e.getMessage());
        return map;
    }
}

步骤三：控制层抛出异常

  @GetMapping("/{id:\d+}")
    public void get(@PathVariable String id) {
        throw new UserNotExistException(id);
   }