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Dahua ICC Open API SDK for Java
package com.dahuatech.hutool.core.text;
import com.dahuatech.hutool.core.util.CharUtil;
import com.dahuatech.hutool.core.util.HexUtil;
import com.dahuatech.hutool.core.util.StrUtil;
/**
* 提供Unicode字符串和普通字符串之间的转换
*
* @author 兜兜毛毛, looly
* @since 4.0.0
*/
public class UnicodeUtil {
/**
* Unicode字符串转为普通字符串
* Unicode字符串的表现方式为:\\uXXXX
*
* @param unicode Unicode字符串
* @return 普通字符串
*/
public static String toString(String unicode) {
if (StrUtil.isBlank(unicode)) {
return unicode;
}
final int len = unicode.length();
StrBuilder sb = StrBuilder.create(len);
int i = -1;
int pos = 0;
while ((i = StrUtil.indexOfIgnoreCase(unicode, "\\u", pos)) != -1) {
sb.append(unicode, pos, i); // 写入Unicode符之前的部分
pos = i;
if (i + 5 < len) {
char c = 0;
try {
c = (char) Integer.parseInt(unicode.substring(i + 2, i + 6), 16);
sb.append(c);
pos = i + 6; // 跳过整个Unicode符
} catch (NumberFormatException e) {
// 非法Unicode符,跳过
sb.append(unicode, pos, i + 2); // 写入"\\u"
pos = i + 2;
}
} else {
pos = i; // 非Unicode符,结束
break;
}
}
if (pos < len) {
sb.append(unicode, pos, len);
}
return sb.toString();
}
/**
* 字符串编码为Unicode形式
*
* @param str 被编码的字符串
* @return Unicode字符串
*/
public static String toUnicode(String str) {
return toUnicode(str, true);
}
/**
* 字符串编码为Unicode形式
*
* @param str 被编码的字符串
* @param isSkipAscii 是否跳过ASCII字符(只跳过可见字符)
* @return Unicode字符串
*/
public static String toUnicode(String str, boolean isSkipAscii) {
if (StrUtil.isEmpty(str)) {
return str;
}
final int len = str.length();
final StrBuilder unicode = StrBuilder.create(str.length() * 6);
char c;
for (int i = 0; i < len; i++) {
c = str.charAt(i);
if (isSkipAscii && CharUtil.isAsciiPrintable(c)) {
unicode.append(c);
} else {
unicode.append(HexUtil.toUnicodeHex(c));
}
}
return unicode.toString();
}
}