spring PropertiesPropertySourceLoader 源码
springboot PropertiesPropertySourceLoader 代码
文件路径：/spring-boot-project/spring-boot/src/main/java/org/springframework/boot/env/PropertiesPropertySourceLoader.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.env;
import java.io.IOException;
import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
import java.util.Map;
import org.springframework.boot.env.OriginTrackedPropertiesLoader.Document;
import org.springframework.core.env.PropertySource;
import org.springframework.core.io.Resource;
import org.springframework.core.io.support.PropertiesLoaderUtils;
/**
* Strategy to load '.properties' files into a {@link PropertySource}.
*
* @author Dave Syer
* @author Phillip Webb
* @author Madhura Bhave
* @since 1.0.0
*/
public class PropertiesPropertySourceLoader implements PropertySourceLoader {
private static final String XML_FILE_EXTENSION = ".xml";
@Override
public String[] getFileExtensions() {
return new String[] { "properties", "xml" };
}
@Override
public List<PropertySource<?>> load(String name, Resource resource) throws IOException {
List<Map<String, ?>> properties = loadProperties(resource);
if (properties.isEmpty()) {
return Collections.emptyList();
}
List<PropertySource<?>> propertySources = new ArrayList<>(properties.size());
for (int i = 0; i < properties.size(); i++) {
String documentNumber = (properties.size() != 1) ? " (document #" + i + ")" : "";
propertySources.add(new OriginTrackedMapPropertySource(name + documentNumber,
Collections.unmodifiableMap(properties.get(i)), true));
}
return propertySources;
}
@SuppressWarnings({ "unchecked", "rawtypes" })
private List<Map<String, ?>> loadProperties(Resource resource) throws IOException {
String filename = resource.getFilename();
List<Map<String, ?>> result = new ArrayList<>();
if (filename != null && filename.endsWith(XML_FILE_EXTENSION)) {
result.add((Map) PropertiesLoaderUtils.loadProperties(resource));
}
else {
List<Document> documents = new OriginTrackedPropertiesLoader(resource).load();
documents.forEach((document) -> result.add(document.asMap()));
}
return result;
}
}
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- 本文标签： Spring Boot Java Spring
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