Spring中@RestControllerAdvice注解的使用详解

@RestControllerAdvice
public class GlobalControllerAdivice {
    private static final Logger log = LoggerFactory.getLogger(GlobalControllerAdivice.class);
    @InitBinder
    public void dataBind(WebDataBinder binder) {
        // 构造方法中 boolean 参数含义为如果是空白字符串，是否转换为 null
        // 即如果为 true，那么 " " 会被转换为 null，否者为""
        binder.registerCustomEditor(String.class, new StringTrimmerEditor(true));
    }
    /**
     * 权限码异常
     */
    @ExceptionHandler(NotPermissionException.class)
    public AjaxResult handleNotPermissionException(NotPermissionException e, HttpServletRequest request) {
        String requestURI = request.getRequestURI();
        log.error("请求地址'{}',权限码校验失败'{}'", requestURI, e.getMessage());
        return AjaxResult.error(HttpStatus.FORBIDDEN, "没有访问权限，请联系管理员授权");
    }
    // 全局数据绑定
    // 应用到所有@RequestMapping注解方法
    // 此处将键值对添加到全局，注解了@RequestMapping的方法都可以获得此键值对
    @ModelAttribute
    public void addUser(Model model) {
        model.addAttribute("msg", "此处将键值对添加到全局，注解了@RequestMapping的方法都可以获得此键值对");
    }
}

@RestControllerAdvice(basePackages={"com.alibaba"})
@Slf4j
public class ExceptionHandlerAdvice {    
    @ExceptionHandler(Exception.class)    
    public String handleException(Exception e) {    
        return "error";
    }   
} 

@RestControllerAdvice(basePackageClasses={TestController.class})
@Slf4j
public class ExceptionHandlerAdvice {
    @ExceptionHandler(Exception.class)    
    public String handleException(Exception e) {    
        return "error";
    } 
}  

@RestControllerAdvice(assignableTypes={TestController.class})
@Slf4j
public class ExceptionHandlerAdvice {
    @ExceptionHandler(Exception.class)    
    public String handleException(Exception e) {    
        return "error";
    } 
}  

@ControllerAdvice(annotations = {TestAnnotation.class})
@Slf4j
public class ExceptionHandlerAdvice {
    @ExceptionHandler(Exception.class)    
    public String handleException(Exception e) {    
        return "error";
    } 
} 

/**
 * 返回状态码
 * 
 * @author
 */
public class HttpStatus
{
    /**
     * 操作成功
     */
    public static final int SUCCESS = 200;
    /**
     * 对象创建成功
     */
    public static final int CREATED = 201;
    /**
     * 请求已经被接受
     */
    public static final int ACCEPTED = 202;
    /**
     * 操作已经执行成功，但是没有返回数据
     */
    public static final int NO_CONTENT = 204;
    /**
     * 资源已被移除
     */
    public static final int MOVED_PERM = 301;
    /**
     * 重定向
     */
    public static final int SEE_OTHER = 303;
    /**
     * 资源没有被修改
     */
    public static final int NOT_MODIFIED = 304;
    /**
     * 参数列表错误（缺少，格式不匹配）
     */
    public static final int BAD_REQUEST = 400;
    /**
     * 未授权
     */
    public static final int UNAUTHORIZED = 401;
    /**
     * 访问受限，授权过期
     */
    public static final int FORBIDDEN = 403;
    /**
     * 资源，服务未找到
     */
    public static final int NOT_FOUND = 404;
    /**
     * 不允许的http方法
     */
    public static final int BAD_METHOD = 405;
    /**
     * 资源冲突，或者资源被锁
     */
    public static final int CONFLICT = 409;
    /**
     * 不支持的数据，媒体类型
     */
    public static final int UNSUPPORTED_TYPE = 415;
    /**
     * 系统内部错误
     */
    public static final int ERROR = 500;
    /**
     * 接口未实现
     */
    public static final int NOT_IMPLEMENTED = 501;
}

/**
 * 未能通过的权限认证异常
 * 
 * @author
 */
public class NotPermissionException extends RuntimeException
{
    private static final long serialVersionUID = 1L;
    public NotPermissionException(String permission)
    {
        super(permission);
    }
    public NotPermissionException(String[] permissions)
    {
        super(StringUtils.join(permissions, ","));
    }
}

/**
	 * 验证用户是否具备某权限, 如果验证未通过，则抛出异常: NotPermissionException
	 * 
	 * @param permission 权限字符串
	 * @return 用户是否具备某权限
	 */
	public void checkPermi(String permission) {
		if (!hasPermi(getPermiList(), permission)) {
			throw new NotPermissionException(permission);
		}
	}

/**
 * 全局异常处理器
 * 
 * @author
 */
@RestControllerAdvice
public class GlobalExceptionHandler {
	private static final Logger log = LoggerFactory.getLogger(GlobalExceptionHandler.class);
	/**
	 * 权限码异常
	 */
	@ExceptionHandler(NotPermissionException.class)
	public AjaxResult handleNotPermissionException(NotPermissionException e, HttpServletRequest request) {
		String requestURI = request.getRequestURI();
		log.error("请求地址'{}',权限码校验失败'{}'", requestURI, e.getMessage());
		return AjaxResult.error(HttpStatus.FORBIDDEN, "没有访问权限，请联系管理员授权");
	}
}

@InitBinder
private void initBinder(WebDataBinder binder) {
	// 可用于自定义参数校验，然后通过addValidators来进行绑定controller
    binder.addValidators(userValidator);
    // 可用于注册 属性编译器
    binder.registerCustomEditor(String.class,new StringTrimmerEditor(true));
}