【java】Charset 字符集,字符串转 Unicode 字符串 - CharyGao - 博客园 https://www.cnblogs.com/Chary/articles/18270458
public static String string2Unicode(String string) {
StringBuffer unicode = new StringBuffer();
for (int i = 0; i < string.length(); i++) {
// 取出每一个字符
char c = string.charAt(i);
if (c<0x20 || c>0x7E) {
// 转换为unicode
String tmp = Integer.toHexString(c);
if (tmp.length() >= 4) {
unicode.append("\\u" + Integer.toHexString(c));
} else if (tmp.length() == 3){
unicode.append("\\u0" + Integer.toHexString(c));
} else if (tmp.length() == 2){
unicode.append("\\u00" + Integer.toHexString(c));
} else if (tmp.length() == 1){
unicode.append("\\u000" + Integer.toHexString(c));
} else if (tmp.length() == 3){
unicode.append("\\u0000");
}
} else {
unicode.append(c);
}
}
return unicode.toString();
}