Java判断String是否是中文，并把中文转换成Unicode

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见如下代码：

     /**
     * 判断是否为中文字符
     * @param c
     * @return
     */
    public  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;
    }

/**
     * 把中文转成Unicode码
     * @param str
     * @return
     */
    public String chineseToUnicode(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;
    }