spring StringMultipartFileEditor 源码
spring StringMultipartFileEditor 代码
文件路径：/spring-web/src/main/java/org/springframework/web/multipart/support/StringMultipartFileEditor.java
/*
* Copyright 2002-2021 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.web.multipart.support;
import java.beans.PropertyEditorSupport;
import java.io.IOException;
import org.springframework.lang.Nullable;
import org.springframework.web.multipart.MultipartFile;
/**
* Custom {@link java.beans.PropertyEditor} for converting
* {@link MultipartFile MultipartFiles} to Strings.
*
* <p>Allows one to specify the charset to use.
*
* @author Juergen Hoeller
* @since 13.10.2003
*/
public class StringMultipartFileEditor extends PropertyEditorSupport {
@Nullable
private final String charsetName;
/**
* Create a new {@link StringMultipartFileEditor}, using the default charset.
*/
public StringMultipartFileEditor() {
this.charsetName = null;
}
/**
* Create a new {@link StringMultipartFileEditor}, using the given charset.
* @param charsetName valid charset name
* @see java.lang.String#String(byte[],String)
*/
public StringMultipartFileEditor(String charsetName) {
this.charsetName = charsetName;
}
@Override
public void setAsText(String text) {
setValue(text);
}
@Override
public void setValue(Object value) {
if (value instanceof MultipartFile multipartFile) {
try {
super.setValue(this.charsetName != null ?
new String(multipartFile.getBytes(), this.charsetName) :
new String(multipartFile.getBytes()));
}
catch (IOException ex) {
throw new IllegalArgumentException("Cannot read contents of multipart file", ex);
}
}
else {
super.setValue(value);
}
}
}
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