java 中文与unicode互转

public class FontUtil { public static void main(String[] args) {
System.out.println(chinaToUnicode("未登陆！"));
System.out.println(decodeUnicode("\u672a\u767b\u9646\uff01"));
} /**
* 把中文转成Unicode码
*
* @param str
* @return
*/
public static String chinaToUnicode(String str) {
String result = "";
for (int i = 0; i < str.length(); i++) {
int chr1 = (char) str.charAt(i);
if (chr1 >= 19968 && chr1 <= 171941) {// 汉字范围 \u4e00-\u9fa5 (中文)
result += "\\u" + Integer.toHexString(chr1);
} else {
result += str.charAt(i);
}
}
return result;
} /**
* 判断是否为中文字符
*
* @param c
* @return
*/
public static boolean isChinese(char c) {
Character.UnicodeBlock ub = Character.UnicodeBlock.of(c);
if (ub == Character.UnicodeBlock.CJK_UNIFIED_IDEOGRAPHS
|| ub == Character.UnicodeBlock.CJK_COMPATIBILITY_IDEOGRAPHS
|| ub == Character.UnicodeBlock.CJK_UNIFIED_IDEOGRAPHS_EXTENSION_A
|| ub == Character.UnicodeBlock.GENERAL_PUNCTUATION
|| ub == Character.UnicodeBlock.CJK_SYMBOLS_AND_PUNCTUATION
|| ub == Character.UnicodeBlock.HALFWIDTH_AND_FULLWIDTH_FORMS) {
return true;
}
return false;
} //Unicode转中文
public static String decodeUnicode(final String unicode) {
StringBuffer string = new StringBuffer(); String[] hex = unicode.split("\\\\u"); for (int i = 0; i < hex.length; i++) { try {
// 汉字范围 \u4e00-\u9fa5 (中文)
if(hex[i].length()>=4){//取前四个，判断是否是汉字
String chinese = hex[i].substring(0, 4);
try {
int chr = Integer.parseInt(chinese, 16);
boolean isChinese = isChinese((char) chr);
//转化成功，判断是否在 汉字范围内
if (isChinese){//在汉字范围内
// 追加成string
string.append((char) chr);
//并且追加 后面的字符
String behindString = hex[i].substring(4);
string.append(behindString);
}else {
string.append(hex[i]);
}
} catch (NumberFormatException e1) {
string.append(hex[i]);
} }else{
string.append(hex[i]);
}
} catch (NumberFormatException e) {
string.append(hex[i]);
}
} return string.toString();
} }