spring WebServletHandler 源码
springboot WebServletHandler 代码
文件路径：/spring-boot-project/spring-boot/src/main/java/org/springframework/boot/web/servlet/WebServletHandler.java
/*
* Copyright 2012-2021 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;
import java.util.Map;
import jakarta.servlet.MultipartConfigElement;
import jakarta.servlet.annotation.MultipartConfig;
import jakarta.servlet.annotation.WebServlet;
import org.springframework.beans.factory.annotation.AnnotatedBeanDefinition;
import org.springframework.beans.factory.config.BeanDefinition;
import org.springframework.beans.factory.support.BeanDefinitionBuilder;
import org.springframework.beans.factory.support.BeanDefinitionRegistry;
import org.springframework.util.StringUtils;
/**
* Handler for {@link WebServlet @WebServlet}-annotated classes.
*
* @author Andy Wilkinson
*/
class WebServletHandler extends ServletComponentHandler {
WebServletHandler() {
super(WebServlet.class);
}
@Override
public void doHandle(Map<String, Object> attributes, AnnotatedBeanDefinition beanDefinition,
BeanDefinitionRegistry registry) {
BeanDefinitionBuilder builder = BeanDefinitionBuilder.rootBeanDefinition(ServletRegistrationBean.class);
builder.addPropertyValue("asyncSupported", attributes.get("asyncSupported"));
builder.addPropertyValue("initParameters", extractInitParameters(attributes));
builder.addPropertyValue("loadOnStartup", attributes.get("loadOnStartup"));
String name = determineName(attributes, beanDefinition);
builder.addPropertyValue("name", name);
builder.addPropertyValue("servlet", beanDefinition);
builder.addPropertyValue("urlMappings", extractUrlPatterns(attributes));
builder.addPropertyValue("multipartConfig", determineMultipartConfig(beanDefinition));
registry.registerBeanDefinition(name, builder.getBeanDefinition());
}
private String determineName(Map<String, Object> attributes, BeanDefinition beanDefinition) {
return (String) (StringUtils.hasText((String) attributes.get("name")) ? attributes.get("name")
: beanDefinition.getBeanClassName());
}
private MultipartConfigElement determineMultipartConfig(AnnotatedBeanDefinition beanDefinition) {
Map<String, Object> attributes = beanDefinition.getMetadata()
.getAnnotationAttributes(MultipartConfig.class.getName());
if (attributes == null) {
return null;
}
return new MultipartConfigElement((String) attributes.get("location"), (Long) attributes.get("maxFileSize"),
(Long) attributes.get("maxRequestSize"), (Integer) attributes.get("fileSizeThreshold"));
}
}
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- 本文标签： Spring Boot Java Spring
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