springboot全局异常处理类

1.注解

主要是用了个 @RestControllerAdvice 注解。拦截controller层的异常统一处理

2. 代码

写个GlobalExceptionHandler:

@RestControllerAdvice
public class GlobalExceptionHandler {
private Logger logger = LoggerFactory.getLogger(GlobalExceptionHandler.class);

@ExceptionHandler(Throwable.class)
public BaseResponse handler(HttpServletRequest request, Throwable e) {

    if (e instanceof MethodArgumentNotValidException) {
        MethodArgumentNotValidException ex = (MethodArgumentNotValidException) e;
        String errMsg = ex.getBindingResult().getFieldError().getDefaultMessage();
        return ResponseTools.newErrorResponse(101, errMsg);
    } else if (e instanceof NoHandlerFoundException) {
        return ResponseTools.newErrorResponse(404, "请求资源不存在!");
    } else if (e instanceof BindException) {
        BindException ex = (BindException) e;
        String errMsg = ex.getBindingResult().getFieldError().getDefaultMessage();
        return ResponseTools.newErrorResponse(102, errMsg);
    } else if (e instanceof ServletRequestBindingException) {
        ServletRequestBindingException ex = (ServletRequestBindingException) e;
        return ResponseTools.newErrorResponse(105, ex.getMessage());
    } else if (e instanceof HttpRequestMethodNotSupportedException) {
        HttpRequestMethodNotSupportedException ex = (HttpRequestMethodNotSupportedException) e;
        return ResponseTools.newErrorResponse(405, "请求方法不支持" + ex.getMethod());
    } else if (e instanceof Exception) {
        logger.error("未知异常 {}", e.getMessage(), e);
        return ResponseTools.newErrorResponse(ReturnCode.UNKNOW_REEOR);
    }
    return ResponseTools.newErrorResponse(ReturnCode.UNKNOW_REEOR);
}
}