转自：一叶飘舟
http://blog.csdn.net/jdsjlzx/article/details/
package lia.meetlucene; import java.io.IOException;
import org.apache.lucene.index.CorruptIndexException; public class Unicode {
public static void main(String[] args) throws CorruptIndexException,
IOException {
String s = "简介";
String tt = gbEncoding(s); // String tt1 = "你好，我想给你说一个事情";
System.out.println("unicodeBytes is: " + tt);
// 输出“简介”的unicode编码
System.out.println("对应的中文: " + decodeUnicode("\\u7b80\\u4ecb")); // System.out.println(decodeUnicode(tt1));
// 输出unicode编码对应的中文
System.out.println("~~~~~~~~~~~~~~~~~~~~~~~~~~~~~");
System.out.println(s.indexOf("\\"));
} public static String gbEncoding(final String gbString) {
char[] utfBytes = gbString.toCharArray();
String unicodeBytes = "";
for (int byteIndex = 0; byteIndex < utfBytes.length; byteIndex++) {
String hexB = Integer.toHexString(utfBytes[byteIndex]);
if (hexB.length() <= 2) {
hexB = "00" + hexB;
}
unicodeBytes = unicodeBytes + "\\u" + hexB;
}
return unicodeBytes;
} public static String decodeUnicode(final String dataStr) {
int start = 0;
int end = 0;
final StringBuffer buffer = new StringBuffer();
while (start > -1) {
end = dataStr.indexOf("\\u", start + 2);
String charStr = "";
if (end == -1) {
charStr = dataStr.substring(start + 2, dataStr.length());
} else {
charStr = dataStr.substring(start + 2, end);
}
char letter = (char) Integer.parseInt(charStr, 16); // 16进制parse整形字符串。
buffer.append(new Character(letter).toString());
start = end;
}
return buffer.toString();
} }
代码详解：
public static String decodeUnicode(final String dataStr) {
int start = 0;
int end = 0;
final StringBuffer buffer = new StringBuffer();
while (start > -1) {
end = dataStr.indexOf("\\u", start + 1);
//使得第一个unicode在start~end之间，+1，+2，+3均可
System.out.println(start + "asdfasd~~~~~~~~~~~~~~~~~~~~~``" + end);
// the index of the first occurrence of the specified substring,
// starting at the specified index,
// or -1 if there is no such occurrence.
String charStr = "";
if (end == -1) {
charStr = dataStr.substring(start + 2, dataStr.length());
} else {
charStr = dataStr.substring(start + 2, end);
}
char letter = 0;
if (charStr.length() == 4) {
letter = (char) Integer.parseInt(charStr, 16); // 16进制parse整形字符串。
}
//防止出错
buffer.append(new Character(letter).toString());
start = end;
}
return buffer.toString();
}