参数注解1

定义注解类：

@Target({ElementType.PARAMETER})
@Retention(RetentionPolicy.RUNTIME)
@Documented
public @interface StrictEncryptedIdParam {
    String value();

    String encryptedIdType();

    boolean required() default true;

    String defaultValue() default "
		
		
ue000ue001ue002
				
";
}

定义解析器：

public final class StrictEncryptedIdAnnotationResolver implements HandlerMethodArgumentResolver {

    @Override
    public boolean supportsParameter(MethodParameter parameter) {
        return parameter.hasParameterAnnotation(StrictEncryptedIdParam.class);
    }

    @Override
    public Object resolveArgument(MethodParameter parameter, ModelAndViewContainer mavContainer,
            NativeWebRequest webRequest, WebDataBinderFactory binderFactory) throws Exception {
        if (parameter.getParameterType() != Long.class
                && parameter.getParameterType() != long.class) {
            throw new RuntimeException("EncryptedIdAnnotation must be on long field");
        }
        HttpServletRequest request = (HttpServletRequest) webRequest.getNativeRequest();
        String idType = "";
        String paramName = StringUtils.EMPTY;
        boolean isRequired = false;
        String defaultValue = "";
        if (parameter.hasParameterAnnotation(StrictEncryptedIdParam.class)) {
            StrictEncryptedIdParam encryptedIdParam = parameter.getParameterAnnotation(StrictEncryptedIdParam.class);
            idType = encryptedIdParam.encryptedIdType();
            paramName = encryptedIdParam.value();
            isRequired = encryptedIdParam.required();
            defaultValue = encryptedIdParam.defaultValue();
        }
        if (StringUtils.isEmpty(paramName)) {
            paramName = parameter.getParameterName();
        }
        String parameterValue = request.getParameter(paramName);
        if (StringUtils.isEmpty(parameterValue) || StringUtils.isEmpty(idType)) {
            if (!defaultValue.equals(ValueConstants.DEFAULT_NONE)) {
                return Long.parseLong(defaultValue);
            }
            if (isRequired) {
                throw new MissingServletRequestParameterException(paramName,
                        parameter.getParameterType().getTypeName());
            }
            return 0L;
        }
        if (StringUtils.isNumeric(parameterValue)) {
            throw new IllegalArgumentException("参数错误");
        }
        if (parameterValue.length() < 8) {
            throw new IllegalArgumentException("参数错误");

        }
        return resolveLong(parameterValue, idType, paramName);
    }

    private long resolveLong(String parameterValue, String idType, String paramName) {
        long decryptedId = IdEncryptor.decrypt(parameterValue, EncryptedIdType.of(idType));
        if (!StringUtils.equals(String.valueOf(decryptedId), parameterValue)) {
            CommonWebScope.paramBundle().putDecryptedIdIntoParams(paramName, decryptedId);
        }
        return decryptedId;
    }
}