spring ThymeleafTemplateAvailabilityProvider 源码

2022-08-12
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springboot ThymeleafTemplateAvailabilityProvider 代码

文件路径：/spring-boot-project/spring-boot-autoconfigure/src/main/java/org/springframework/boot/autoconfigure/thymeleaf/ThymeleafTemplateAvailabilityProvider.java

/*
 * Copyright 2012-2022 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.boot.autoconfigure.thymeleaf;

import org.springframework.boot.autoconfigure.template.TemplateAvailabilityProvider;
import org.springframework.core.env.Environment;
import org.springframework.core.io.ResourceLoader;
import org.springframework.util.ClassUtils;

/**
 * {@link TemplateAvailabilityProvider} that provides availability information for
 * Thymeleaf view templates.
 *
 * @author Andy Wilkinson
 * @author Madhura Bhave
 * @since 1.1.0
 */
public class ThymeleafTemplateAvailabilityProvider implements TemplateAvailabilityProvider {

	@Override
	public boolean isTemplateAvailable(String view, Environment environment, ClassLoader classLoader,
			ResourceLoader resourceLoader) {
		if (ClassUtils.isPresent("org.thymeleaf.spring6.SpringTemplateEngine", classLoader)) {
			String prefix = environment.getProperty("spring.thymeleaf.prefix", ThymeleafProperties.DEFAULT_PREFIX);
			String suffix = environment.getProperty("spring.thymeleaf.suffix", ThymeleafProperties.DEFAULT_SUFFIX);
			return resourceLoader.getResource(prefix + view + suffix).exists();
		}
		return false;
	}

}

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本文标签： Java Spring Spring Boot
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