spring security Utf8 源码
spring security Utf8 代码
文件路径：/crypto/src/main/java/org/springframework/security/crypto/codec/Utf8.java
/*
* Copyright 2002-2016 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.security.crypto.codec;
import java.nio.ByteBuffer;
import java.nio.CharBuffer;
import java.nio.charset.CharacterCodingException;
import java.nio.charset.Charset;
import java.nio.charset.StandardCharsets;
/**
* UTF-8 Charset encoder/decoder.
* <p>
* For internal use only.
*
* @author Luke Taylor
*/
public final class Utf8 {
private static final Charset CHARSET = StandardCharsets.UTF_8;
private Utf8() {
}
/**
* Get the bytes of the String in UTF-8 encoded form.
*/
public static byte[] encode(CharSequence string) {
try {
ByteBuffer bytes = CHARSET.newEncoder().encode(CharBuffer.wrap(string));
byte[] bytesCopy = new byte[bytes.limit()];
System.arraycopy(bytes.array(), 0, bytesCopy, 0, bytes.limit());
return bytesCopy;
}
catch (CharacterCodingException ex) {
throw new IllegalArgumentException("Encoding failed", ex);
}
}
/**
* Decode the bytes in UTF-8 form into a String.
*/
public static String decode(byte[] bytes) {
try {
return CHARSET.newDecoder().decode(ByteBuffer.wrap(bytes)).toString();
}
catch (CharacterCodingException ex) {
throw new IllegalArgumentException("Decoding failed", ex);
}
}
}
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