spring RandomString 源码
springboot RandomString 代码
文件路径：/spring-boot-project/spring-boot-tools/spring-boot-buildpack-platform/src/main/java/org/springframework/boot/buildpack/platform/docker/type/RandomString.java
/*
* Copyright 2012-2020 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
*
* https://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.
*/
package org.springframework.boot.buildpack.platform.docker.type;
import java.util.Random;
import java.util.stream.IntStream;
import org.springframework.util.Assert;
/**
* Utility class used to generate random strings.
*
* @author Phillip Webb
*/
final class RandomString {
private static final Random random = new Random();
private RandomString() {
}
static String generate(String prefix, int randomLength) {
Assert.notNull(prefix, "Prefix must not be null");
return prefix + generateRandom(randomLength);
}
static CharSequence generateRandom(int length) {
IntStream chars = random.ints('a', 'z' + 1).limit(length);
return chars.collect(StringBuilder::new, StringBuilder::appendCodePoint, StringBuilder::append);
}
}
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- 所属分类： 后端技术
- 本文标签： Spring Boot Java Spring
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