spring MustacheView 源码
springboot MustacheView 代码
文件路径：/spring-boot-project/spring-boot/src/main/java/org/springframework/boot/web/servlet/view/MustacheView.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.web.servlet.view;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.Reader;
import java.util.Locale;
import java.util.Map;
import com.samskivert.mustache.Mustache.Compiler;
import com.samskivert.mustache.Template;
import jakarta.servlet.http.HttpServletRequest;
import jakarta.servlet.http.HttpServletResponse;
import org.springframework.core.io.Resource;
import org.springframework.web.servlet.View;
import org.springframework.web.servlet.view.AbstractTemplateView;
/**
* Spring MVC {@link View} using the Mustache template engine.
*
* @author Brian Clozel
* @author Dave Syer
* @author Phillip Webb
* @since 2.0.0
*/
public class MustacheView extends AbstractTemplateView {
private Compiler compiler;
private String charset;
/**
* Set the Mustache compiler to be used by this view.
* <p>
* Typically this property is not set directly. Instead a single {@link Compiler} is
* expected in the Spring application context which is used to compile Mustache
* templates.
* @param compiler the Mustache compiler
*/
public void setCompiler(Compiler compiler) {
this.compiler = compiler;
}
/**
* Set the charset used for reading Mustache template files.
* @param charset the charset to use for reading template files
*/
public void setCharset(String charset) {
this.charset = charset;
}
@Override
public boolean checkResource(Locale locale) throws Exception {
Resource resource = getApplicationContext().getResource(getUrl());
return (resource != null && resource.exists());
}
@Override
protected void renderMergedTemplateModel(Map<String, Object> model, HttpServletRequest request,
HttpServletResponse response) throws Exception {
Template template = createTemplate(getApplicationContext().getResource(getUrl()));
if (template != null) {
template.execute(model, response.getWriter());
}
}
private Template createTemplate(Resource resource) throws IOException {
try (Reader reader = getReader(resource)) {
return this.compiler.compile(reader);
}
}
private Reader getReader(Resource resource) throws IOException {
if (this.charset != null) {
return new InputStreamReader(resource.getInputStream(), this.charset);
}
return new InputStreamReader(resource.getInputStream());
}
}
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- 本文标签： Spring Boot Java Spring
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