1.从 Unicode 形式的字符串转换成对应的编码的特殊字符串。 如 “\u9EC4” to “黄”
/** * 从 Unicode 形式的字符串转换成对应的编码的特殊字符串。 如 "\u9EC4" to "黄". * Converts encoded \\uxxxx to unicode chars * and changes special saved chars to their original forms * * @param in * Unicode编码的字符数组。 * @param off * 转换的起始偏移量。 * @param len * 转换的字符长度。 * @param convtBuf * 转换的缓存字符数组。 * @return 完成转换，返回编码前的特殊字符串。 */
public static String fromEncodedUnicode(char[] in, int off, int len) {
char aChar;
char[] out = new char[len]; // 只短不长
int outLen = 0;
int end = off + len;
while (off < end) {
aChar = in[off++];
if (aChar == '%') {
aChar = in[off++];
if (aChar == 'u') {
// Read the xxxx
int value = 0;
for (int i = 0; i < 4; i++) {
aChar = in[off++];
switch (aChar) {
case '0':
case '1':
case '2':
case '3':
case '4':
case '5':
case '6':
case '7':
case '8':
case '9':
value = (value << 4) + aChar - '0';
break;
case 'a':
case 'b':
case 'c':
case 'd':
case 'e':
case 'f':
value = (value << 4) + 10 + aChar - 'a';
break;
case 'A':
case 'B':
case 'C':
case 'D':
case 'E':
case 'F':
value = (value << 4) + 10 + aChar - 'A';
break;
default:
throw new IllegalArgumentException("Malformed \\uxxxx encoding.");
}
}
out[outLen++] = (char) value;
} else {
if (aChar == 't') {
aChar = '\t';
} else if (aChar == 'r') {
aChar = '\r';
} else if (aChar == 'n') {
aChar = '\n';
} else if (aChar == 'f') {
aChar = '\f';
}
out[outLen++] = aChar;
}
} else {
out[outLen++] = (char) aChar;
}
}
return new String(out, 0, outLen);
}2.将字符串进行UTF-8/GBK编码
URLEncoder.encode(String str,"UTF-8/GBK");//java.net.URLEncoder.encode(String s, String charsetName)3.将UTF-8编码转为字符串
URLDecoder.decode(String str,"UTF-8/GBK");