spring MultipartConfigFactory 源码
springboot MultipartConfigFactory 代码
文件路径：/spring-boot-project/spring-boot/src/main/java/org/springframework/boot/web/servlet/MultipartConfigFactory.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 jakarta.servlet.MultipartConfigElement;
import org.springframework.util.unit.DataSize;
/**
* Factory that can be used to create a {@link MultipartConfigElement}.
*
* @author Phillip Webb
* @since 1.4.0
*/
public class MultipartConfigFactory {
private String location;
private DataSize maxFileSize;
private DataSize maxRequestSize;
private DataSize fileSizeThreshold;
/**
* Sets the directory location where files will be stored.
* @param location the location
*/
public void setLocation(String location) {
this.location = location;
}
/**
* Sets the maximum {@link DataSize size} allowed for uploaded files.
* @param maxFileSize the maximum file size
*/
public void setMaxFileSize(DataSize maxFileSize) {
this.maxFileSize = maxFileSize;
}
/**
* Sets the maximum {@link DataSize} allowed for multipart/form-data requests.
* @param maxRequestSize the maximum request size
*/
public void setMaxRequestSize(DataSize maxRequestSize) {
this.maxRequestSize = maxRequestSize;
}
/**
* Sets the {@link DataSize size} threshold after which files will be written to disk.
* @param fileSizeThreshold the file size threshold
*/
public void setFileSizeThreshold(DataSize fileSizeThreshold) {
this.fileSizeThreshold = fileSizeThreshold;
}
/**
* Create a new {@link MultipartConfigElement} instance.
* @return the multipart config element
*/
public MultipartConfigElement createMultipartConfig() {
long maxFileSizeBytes = convertToBytes(this.maxFileSize, -1);
long maxRequestSizeBytes = convertToBytes(this.maxRequestSize, -1);
long fileSizeThresholdBytes = convertToBytes(this.fileSizeThreshold, 0);
return new MultipartConfigElement(this.location, maxFileSizeBytes, maxRequestSizeBytes,
(int) fileSizeThresholdBytes);
}
/**
* Return the amount of bytes from the specified {@link DataSize size}. If the size is
* {@code null} or negative, returns {@code defaultValue}.
* @param size the data size to handle
* @param defaultValue the default value if the size is {@code null} or negative
* @return the amount of bytes to use
*/
private long convertToBytes(DataSize size, int defaultValue) {
if (size != null && !size.isNegative()) {
return size.toBytes();
}
return defaultValue;
}
}
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