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  • native与ascii互转

    package org.edujks.schoolapp.schoolbasedresearch.schoolsubject.action;
    
    
    public class DecodeUtil {
    
        /**
         * @declare native与ascii码互转
         * @param args
         * @author Lilin
         */
        public static void main(String[] args) {
            // TODO Auto-generated method stub
            String a = chinaToUnicode("飞机f发多少adsfadsfadfad");
            System.out.println(a);
    
            System.out.println(decodeUnicode(a));
    
        }
    
        /**
         * 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;
        }
    
        /***
         * 转码
         * 
         * @param theString
         * @return
         * 
         * @time 2012-6-13 下午5:54:34 TODO
         */
        public static String decodeUnicode(String theString) {
            char aChar;
            int len = theString.length();
            StringBuffer outBuffer = new StringBuffer(len);
            for (int x = 0; x < len;) {
                aChar = theString.charAt(x++);
                if (aChar == '\') {
                    aChar = theString.charAt(x++);
                    if (aChar == 'u') {
                        int value = 0;
                        for (int i = 0; i < 4; i++) {
                            aChar = theString.charAt(x++);
                            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.");
                            }
                        }
                        outBuffer.append((char) value);
                    } else {
                        if (aChar == 't')
                            aChar = '	';
                        else if (aChar == 'r')
                            aChar = '
    ';
                        else if (aChar == 'n')
                            aChar = '
    ';
                        else if (aChar == 'f')
                            aChar = 'f';
                        outBuffer.append(aChar);
                    }
                } else
                    outBuffer.append(aChar);
            }
    
            return outBuffer.toString();
    
        }
    
    }
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  • 原文地址:https://www.cnblogs.com/gisblogs/p/4123499.html
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