Java UTF8 Convert To utf8Togb2312(String str)

Description

utf Togb

License

Open Source License

Declaration

public static String utf8Togb2312(String str) 

Method Source Code

//package com.java2s;
/**//w w  w  .j  a va 2 s. com
The MIT License (MIT) * Copyright (c) 2015 ????
    
 * Permission is hereby granted, free of charge, to any person obtaining a copy of
 * this software and associated documentation files (the "Software"), to deal in
 * the Software without restriction, including without limitation the rights to
 * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
 * the Software, and to permit persons to whom the Software is furnished to do so,
 * subject to the following conditions:
    
 * The above copyright notice and this permission notice shall be included in all
 * copies or substantial portions of the Software.
    
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
 * FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
 * COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
 * IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 */

public class Main {
    public static String utf8Togb2312(String str) {
        StringBuffer sb = new StringBuffer();
        for (int i = 0; i < str.length(); i++) {
            char c = str.charAt(i);
            switch (c) {
            case '+':
                sb.append(' ');
                break;
            case '%':
                try {
                    sb.append((char) Integer.parseInt(str.substring(i + 1, i + 3), 16));
                } catch (NumberFormatException e) {
                    throw new IllegalArgumentException();
                }
                i += 2;
                break;
            default:
                sb.append(c);
                break;
            }
        }
        // Undo conversion to external encoding
        String result = sb.toString();
        String res = null;
        try {
            byte[] inputBytes = result.getBytes("8859_1");
            res = new String(inputBytes, "UTF-8");
        } catch (Exception e) {
        }
        return res;
    }

    public static String subString(String s, int length) {
        if (isBlank(s))
            return "";
        if (s.getBytes().length <= length)
            return s;
        char ch[] = null;
        if (s.length() >= length)
            ch = s.substring(0, length).toCharArray();
        else
            ch = s.toCharArray();
        int readLen = 0;
        StringBuffer sb = new StringBuffer("");
        for (int i = 0; i < ch.length; i++) {
            String c = String.valueOf(ch[i]);
            readLen += c.getBytes().length;
            if (readLen > length)
                return sb.toString();
            sb.append(c);
        }
        return sb.toString();
    }

    public static boolean isBlank(String str) {
        return (str == null || str.trim().equals("") || str.length() < 0);
    }

    public static boolean isBlank(Object str) {
        return (str == null || str.toString().trim().equals("") || str.toString().length() < 0);
    }

    public static boolean isBlank(String[] args) {
        return args == null || args.length == 0 ? true : false;
    }
}

Related

1. getBytesUtf8(String string)
2. getBytesUTF8(String string)
3. getBytesUtf8(String string)
4. UTF8ToCodePoint(byte[] b, int s)
5. utf8ToCodePoint(int b1, int b2, int b3, int b4)
6. utf8ToString(byte[] src, int stPos, int utf8Len)
7. utf8ToUnicode(String inStr)
8. utfToChars(byte[] src, int srcIndex, char[] dst, int dstIndex, int len)