java - 当每个 case block 都有相同的代码时，在 switch-case 语句中使用什么？

Question

我有可以通过两种方式完成的代码:

SWITCH WITHOUT BREAK(用于case中的通用代码)

ResultCodes resCode = ResultCodes.fromResponseCode(resultCode);
switch (resCode) {
case SUCCESS:
    if(userIdentity != null)
        Logger.logInfo(MODULE, "User Authenticated Successfully, UseIdentity: " +userIdentity);
    resultMessage=getText(resCode.responseCode.toString());
    RESPONSE = SUCCESS;
    break;
case REDIRECT:
    url = resultMap.get(WebinKeyConstants.REDIRECTION_URL.val);
    Logger.logInfo(MODULE, "Redirecting to URL : " + url);
    resultMessage=getText(resCode.responseCode.toString());         
    RESPONSE = REDIRECT;
    break;
case AUTHENTICATION_FAIL:           
case USER_ACCOUNT_BLOCKED:
case USER_ACCOUNT_INACTIVE:
case USER_ACCOUNT_SUSPENDED:
case USER_ACCOUNT_TERMINATED:
case USER_ACCOUNT_BLOCKED_ALERT:
case OTP_SEND_SUCCESS:
case USER_PROFILE_NOT_FOUND:
         resultMessage=getText(resCode.responseCode.toString());
         RESPONSE = ERROR;
         break;
}

在上面的场景中，只有一个中断意味着所有情况都将执行相同的代码。

WITH BREAK FOR EACH CASE(对于普通代码)

上述场景也可以通过其他方式实现，如下所示

ResultCodes resCode = ResultCodes.fromResponseCode(resultCode);
switch (resCode) {
case SUCCESS:
    if(userIdentity != null)
        Logger.logInfo(MODULE, "User Authenticated Successfully, UseIdentity: " +userIdentity);
    resultMessage=getText(resCode.responseCode.toString());
    RESPONSE = SUCCESS;
    break;
case REDIRECT:
    url = resultMap.get(WebinKeyConstants.REDIRECTION_URL.val);
    Logger.logInfo(MODULE, "Redirecting to URL : " + url);
    resultMessage=getText(resCode.responseCode.toString());         
    RESPONSE = REDIRECT;
    break;
case AUTHENTICATION_FAIL:           
    resultMessage=getText(resCode.responseCode.toString());
    RESPONSE = ERROR;
    break;
case USER_ACCOUNT_BLOCKED:
    resultMessage=getText(resCode.responseCode.toString());
    RESPONSE = ERROR;
    break;
case USER_ACCOUNT_INACTIVE:
    resultMessage=getText(resCode.responseCode.toString());
    RESPONSE = ERROR;
    break;
case USER_ACCOUNT_SUSPENDED:
    resultMessage=getText(resCode.responseCode.toString());
    RESPONSE = ERROR;
    break;
case USER_ACCOUNT_TERMINATED:
    resultMessage=getText(resCode.responseCode.toString());
    RESPONSE = ERROR;
    break;
case USER_ACCOUNT_BLOCKED_ALERT:
    resultMessage=getText(resCode.responseCode.toString());
    RESPONSE = ERROR;
    break;
case OTP_SEND_SUCCESS:
    resultMessage=getText(resCode.responseCode.toString());
    RESPONSE = ERROR;
    break;
case USER_PROFILE_NOT_FOUND:
    resultMessage=getText(resCode.responseCode.toString());
    RESPONSE = ERROR;
    break;
}

哪个更好用？有没有性能问题？

Answer 1

第一个switch block代码更少，可读性更好。如果出现性能问题，则可以忽略不计。