spring-data-elasticsearch ResourceUtil 源码
spring-data-elasticsearch ResourceUtil 代码
文件路径：/src/main/java/org/springframework/data/elasticsearch/core/ResourceUtil.java
/*
* Copyright 2019-2022 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.data.elasticsearch.core;
import java.io.InputStream;
import java.nio.charset.Charset;
import org.springframework.core.io.ClassPathResource;
import org.springframework.data.elasticsearch.ResourceFailureException;
import org.springframework.util.Assert;
import org.springframework.util.StreamUtils;
/**
* Utility to read {@link org.springframework.core.io.Resource}s.
*
* @author Mark Paluch
* @author Peter-Josef Meisch
* @since 3.2
*/
public abstract class ResourceUtil {
/**
* Read a {@link ClassPathResource} into a {@link String}.
*
* @param url url the resource
* @return the contents of the resource
*/
public static String readFileFromClasspath(String url) {
Assert.notNull(url, "url must not be null");
try (InputStream is = new ClassPathResource(url).getInputStream()) {
return StreamUtils.copyToString(is, Charset.defaultCharset());
} catch (Exception e) {
throw new ResourceFailureException("Could not load resource from " + url, e);
}
}
// Utility constructor
private ResourceUtil() {}
}
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