本文整理了Java中com.amazonaws.util.StringUtils.isNullOrEmpty()方法的一些代码示例，展示了StringUtils.isNullOrEmpty()的具体用法。这些代码示例主要来源于Github/Stackoverflow/Maven等平台，是从一些精选项目中提取出来的代码，具有较强的参考意义，能在一定程度帮忙到你。StringUtils.isNullOrEmpty()方法的具体详情如下：
包路径：com.amazonaws.util.StringUtils
类名称：StringUtils
方法名：isNullOrEmpty

StringUtils.isNullOrEmpty介绍

暂无

代码示例

代码示例来源：origin: aws/aws-sdk-java

/**
 * @return true if the given value is non-null and non-empty
 */
public static boolean hasValue(String str) {
  return !isNullOrEmpty(str);
}

代码示例来源：origin: aws/aws-sdk-java

/**
 * Converts a given String to lower case with Locale.ENGLISH
 *
 * @param str the string to be converted to lower case
 * @return the lower case of string, or itself if string is null/empty
 */
public static String lowerCase(String str) {
  if(isNullOrEmpty(str)) {
    return str;
  }
  return str.toLowerCase(LOCALE_ENGLISH);
}

代码示例来源：origin: aws/aws-sdk-java

/**
 * Converts a given String to upper case with Locale.ENGLISH
 *
 * @param str the string to be converted to upper case
 * @return the upper case of string, or itself if string is null/empty
 */
public static String upperCase(String str) {
  if(isNullOrEmpty(str)) {
    return str;
  }
  return str.toUpperCase(LOCALE_ENGLISH);
}

代码示例来源：origin: aws/aws-sdk-java

/**
 * <p> Asserts that the specified parameter value is neither <code>empty</code> nor null, and if
 * it is, throws a <code>SdkClientException</code> with the specified error message. </p>
 *
 * @param parameterValue The parameter value being checked.
 * @param errorMessage   The error message to include in the SdkClientException if the
 *                       specified parameter value is empty.
 */
private void assertParameterNotEmpty(String parameterValue, String errorMessage) {
  if (StringUtils.isNullOrEmpty(parameterValue)) {
    throw new SdkClientException(errorMessage);
  }
}

代码示例来源：origin: aws/aws-sdk-java

private void parseNonProxyHosts(String nonProxyHosts) {
  if (!StringUtils.isNullOrEmpty(nonProxyHosts)) {
    String[] hosts = nonProxyHosts.split("\\|");
    hostPatterns = new String[hosts.length];
    for (int i = 0; i < hosts.length; ++i) {
      hostPatterns[i] = hosts[i].toLowerCase().replace("*", ".*?");
    }
  }
}

代码示例来源：origin: apache/nifi

public static void notEmpty(String in, String fieldName) {
  if (StringUtils.isNullOrEmpty(in)) {
    throw new IllegalArgumentException(String.format("%s cannot be empty", fieldName));
  }
}

代码示例来源：origin: aws/aws-sdk-java

/**
 * Replace all the labels in host with %s symbols and collect the input shape member names into a list
 */
private void replaceHostLabelsWithStringSpecifier(String hostExpression) {
  if (StringUtils.isNullOrEmpty(hostExpression)) {
    throw new IllegalArgumentException("Given host prefix is either null or empty");
  }
  Matcher matcher = PATTERN.matcher(hostExpression);
  while (matcher.find()) {
    String matched = matcher.group(1);
    c2jNames.add(matched);
    hostWithStringSpecifier = hostWithStringSpecifier.replaceFirst("\\{" + matched + "}", "%s");
  }
}

代码示例来源：origin: aws/aws-sdk-java

/**
 * Throw exception if timestamp is provided for non-json protocol
 */
private void validateTimestampProtocol(String protocolString, String timestampFormat, String shape2) {
  if (!StringUtils.isNullOrEmpty(timestampFormat) && isNonJsonProtocol(protocolString)) {
    throw new IllegalArgumentException(String.format(
      "Shape %s has timestamp format provided. Timestamp format for requests is not supported for xml, query or ec2 "
      + "protocol",
      shape2));
  }
}

代码示例来源：origin: aws/aws-sdk-java

public static Date parseRfc822Date(String dateString) {
  if (StringUtils.isNullOrEmpty(dateString)) {
    return null;
  }
  return DateUtils.parseRFC822Date(dateString);
}

代码示例来源：origin: aws/aws-sdk-java

private static boolean hasServingRegionHeader(HttpResponse response) {
  return !StringUtils.isNullOrEmpty(getServingRegionHeader(response));
}

代码示例来源：origin: aws/aws-sdk-java

/**
 * TODO The order would make more sense as System Property, Environment Variable, Default
 * Profile name but we have to keep the current order for backwards compatiblity. Consider
 * changing this in a future major version.
 */
public final String loadProfileName() {
  final String profileEnvVarOverride = getEnvProfileName();
  if (!StringUtils.isNullOrEmpty(profileEnvVarOverride)) {
    return profileEnvVarOverride;
  } else {
    final String profileSysPropOverride = getSysPropertyProfileName();
    if (!StringUtils.isNullOrEmpty(profileSysPropOverride)) {
      return profileSysPropOverride;
    } else {
      return DEFAULT_PROFILE_NAME;
    }
  }
}

代码示例来源：origin: aws/aws-sdk-java

@Override
public AWSCredentials getCredentials() {
  String accessKey = StringUtils.trim(System.getProperty(ACCESS_KEY_SYSTEM_PROPERTY));
  String secretKey = StringUtils.trim(System.getProperty(SECRET_KEY_SYSTEM_PROPERTY));
  String sessionToken = StringUtils.trim(System.getProperty(SESSION_TOKEN_SYSTEM_PROPERTY));
  if (StringUtils.isNullOrEmpty(accessKey) || StringUtils.isNullOrEmpty(secretKey)) {
    throw new SdkClientException(
        "Unable to load AWS credentials from Java system "
        + "properties (" + ACCESS_KEY_SYSTEM_PROPERTY + " and "
        + SECRET_KEY_SYSTEM_PROPERTY + ")");
  }
  if (StringUtils.isNullOrEmpty(sessionToken)) {
    return new BasicAWSCredentials(accessKey, secretKey);
  } else {
    return new BasicSessionCredentials(accessKey, secretKey, sessionToken);
  }
}

代码示例来源：origin: aws/aws-sdk-java

/**
 * Asserts the string is not null and not empty, reporting to {@link ProblemReporter} with this context if it is.
 *
 * @param propertyValue Value to assert on.
 * @param propertyName  Name of property.
 */
public void assertStringNotEmpty(String propertyValue, String propertyName) {
  if (StringUtils.isNullOrEmpty(propertyValue)) {
    problemReporter.report(new Problem(this, String.format("%s is a required property.", propertyName)));
  }
}

代码示例来源：origin: aws/aws-sdk-java

public static JavaVersion parseJavaVersion(final String fullVersionString) {
  if (!StringUtils.isNullOrEmpty(fullVersionString)) {
    final Matcher matcher = VERSION_REGEX.matcher(fullVersionString);
    if (matcher.matches()) {
      final Integer majorVersionFamily = NumberUtils.tryParseInt(matcher.group(1));
      final Integer majorVersion = NumberUtils.tryParseInt(matcher.group(2));
      final Integer maintenanceNumber = NumberUtils.tryParseInt(matcher.group(3));
      final Integer updateNumber = NumberUtils.tryParseInt(matcher.group(4));
      return new JavaVersion(majorVersionFamily, majorVersion, maintenanceNumber, updateNumber);
    }
  }
  return JavaVersion.UNKNOWN;
}

代码示例来源：origin: aws/aws-sdk-java

private static String uriFrom(Request<?> sdkRequest) {
  StringBuilder uriBuilder = new StringBuilder(sdkRequest.getEndpoint().toString());
  if (!StringUtils.isNullOrEmpty(sdkRequest.getResourcePath())) {
    uriBuilder.append(sdkRequest.getResourcePath());
  }
  QueryStringEncoder encoder = new QueryStringEncoder(uriBuilder.toString());
  for (Map.Entry<String, List<String>> param : sdkRequest.getParameters().entrySet()) {
    for (String value : param.getValue()) {
      encoder.addParam(param.getKey(), value);
    }
  }
  return encoder.toString();
}

代码示例来源：origin: aws/aws-sdk-java

/**
 * @param value Raw string representing value of enum
 * @return HttpMethodName enum or null if value is not present.
 * @throws IllegalArgumentException If value does not represent a known enum value.
 */
public static HttpMethodName fromValue(String value) {
  if (StringUtils.isNullOrEmpty(value)) {
    return null;
  }
  final String upperCaseValue = StringUtils.upperCase(value);
  for (HttpMethodName httpMethodName : values()) {
    if (httpMethodName.name().equals(upperCaseValue)) {
      return httpMethodName;
    }
  }
  throw new IllegalArgumentException("Unsupported HTTP method name " + value);
}

代码示例来源：origin: aws/aws-sdk-java

@Override
public Boolean endpointDiscoveryEnabled() {
  Boolean endpointDiscoveryEnabled = null;
  File configFile = locationProvider.getLocation();
  if (configFile != null && configFile.exists()) {
    BasicProfile profile = loadProfile(configFile);
    if (profile != null && !StringUtils.isNullOrEmpty(profile.getEndpointDiscovery())) {
      try {
        endpointDiscoveryEnabled = Boolean.parseBoolean(profile.getEndpointDiscovery());
      } catch (Exception e) {
        throw new RuntimeException("Unable to parse value for " + ProfileKeyConstants.ENDPOINT_DISCOVERY);
      }
    }
  }
  return endpointDiscoveryEnabled;
}

代码示例来源：origin: aws/aws-sdk-java

@Override
public String getRegion() throws SdkClientException {
  File configFile = locationProvider.getLocation();
  if (configFile != null && configFile.exists()) {
    BasicProfile profile = loadProfile(configFile);
    if (profile != null && !StringUtils.isNullOrEmpty(profile.getRegion())) {
      return profile.getRegion();
    }
  }
  return null;
}

代码示例来源：origin: aws/aws-sdk-java

@Override
public AmazonServiceException handle(HttpResponse errorResponse) throws Exception {
  AmazonServiceException ase = createAse(errorResponse);
  if (ase == null) {
    throw new SdkClientException("Unable to unmarshall error response from service");
  }
  ase.setHttpHeaders(errorResponse.getHeaders());
  if (StringUtils.isNullOrEmpty(ase.getErrorCode())) {
    ase.setErrorCode(errorResponse.getStatusCode() + " " + errorResponse.getStatusText());
  }
  return ase;
}

代码示例来源：origin: apache/ignite

/**
 * Initializing the IP finder.
 */
private void initClients() {
  if (credsProvider == null || isNullOrEmpty(loadBalancerName) || isNullOrEmpty(region))
    throw new IgniteSpiException("One or more configuration parameters are invalid [setCredentialsProvider=" +
      credsProvider + ", setRegion=" + region + ", setLoadBalancerName=" +
      loadBalancerName + "]");
  if (amazonEC2Client == null)
    amazonEC2Client = AmazonEC2ClientBuilder.standard().withRegion(region).withCredentials(credsProvider)
      .build();
  if (amazonELBClient == null)
    amazonELBClient = AmazonElasticLoadBalancingClientBuilder.standard().withRegion(region)
      .withCredentials(credsProvider).build();
}