spring ByteArrayMultipartFileEditor 源码
spring ByteArrayMultipartFileEditor 代码
文件路径：/spring-web/src/main/java/org/springframework/web/multipart/support/ByteArrayMultipartFileEditor.java
/*
* Copyright 2002-2017 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.web.multipart.support;
import java.io.IOException;
import org.springframework.beans.propertyeditors.ByteArrayPropertyEditor;
import org.springframework.lang.Nullable;
import org.springframework.web.multipart.MultipartFile;
/**
* Custom {@link java.beans.PropertyEditor} for converting
* {@link MultipartFile MultipartFiles} to byte arrays.
*
* @author Juergen Hoeller
* @since 13.10.2003
*/
public class ByteArrayMultipartFileEditor extends ByteArrayPropertyEditor {
@Override
public void setValue(@Nullable Object value) {
if (value instanceof MultipartFile multipartFile) {
try {
super.setValue(multipartFile.getBytes());
}
catch (IOException ex) {
throw new IllegalArgumentException("Cannot read contents of multipart file", ex);
}
}
else if (value instanceof byte[]) {
super.setValue(value);
}
else {
super.setValue(value != null ? value.toString().getBytes() : null);
}
}
@Override
public String getAsText() {
byte[] value = (byte[]) getValue();
return (value != null ? new String(value) : "");
}
}
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