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Spring's collectionToDelimitedString implementation
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// from https://github.com/spring-projects/spring-framework/blob/master/spring-core/src/main/java/org/springframework/util/StringUtils.java | |
/* | |
* Copyright 2002-2017 the original author or authors. | |
* | |
* Licensed under the Apache License, Version 2.0 (the "License"); | |
* you may not use this file except in compliance with the License. | |
* You may obtain a copy of the License at | |
* | |
* http://www.apache.org/licenses/LICENSE-2.0 | |
* | |
* Unless required by applicable law or agreed to in writing, software | |
* distributed under the License is distributed on an "AS IS" BASIS, | |
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | |
* See the License for the specific language governing permissions and | |
* limitations under the License. | |
*/ | |
public class StringUtils { | |
public static String collectionToDelimitedString(Collection<?> coll, String delim, String prefix, String suffix) { | |
if(coll == null || coll.isEmpty()) { | |
return null; | |
} | |
StringBuilder sb = new StringBuilder(); | |
Iterator<?> it = coll.iterator(); | |
while (it.hasNext()) { | |
sb.append(prefix).append(it.next()).append(suffix); | |
if (it.hasNext()) { | |
sb.append(delim); | |
} | |
} | |
return sb.toString(); | |
} | |
} |
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