base64coder调用

  1 import java.awt.Color;
  2 import java.io.ByteArrayInputStream;
  3 import java.io.ByteArrayOutputStream;
  4 import java.io.File;
  5 import java.io.FileInputStream;
  6 import java.io.FileNotFoundException;
  7 import java.io.FileOutputStream;
  8 import java.io.IOException;
  9 import java.io.ObjectInputStream;
 10 import java.io.ObjectOutputStream;
 11 import java.util.HashMap;
 12 import java.util.Iterator;
 13 import java.util.Properties;
 14  
 15 
 16 /**
 17  * @author yang
 18  * @category  
 19  * @see http://www.114la.com/other/rgb.htm
 20  */
 21 
 22 public class Do {
 23 
 24     public static void main(String[] args) {
 25         
 26         //1 read propriety
 27         String filepath="D:\\ec.properties";
 28         
 29         //-----------------gui_preferences--------------
 30         String gui_preferences="gui_preferences";         
 31         Color color_gradient_min=new Color(179,238,58);
 32         Color color_gradient_max=new Color(185,211,238);
 33         String color_gradient_scheme="selfDesing";
 34         //-----------------gui_preferences--------------
 35         
 36         
 37         Properties pro=new  Properties();
 38         try {
 39             pro.load(new FileInputStream(new File(filepath)));
 40         } catch (FileNotFoundException e) {
 41             // TODO Auto-generated catch block
 42             e.printStackTrace();
 43         } catch (IOException e) {
 44             // TODO Auto-generated catch block
 45             e.printStackTrace();
 46         }
 47          ///gui_preferences
 48         System.out.println(pro.getProperty(gui_preferences));
 49         String tempstr=pro.getProperty(gui_preferences);
 50         
 51         //2 decode
 52         //HashMap hm=new HashMap();
 53         HashMap hm=Do.getMapFromString(tempstr);
 54         Iterator t=hm.keySet().iterator(); 
 55         
 56         //3 modify 
 57         while(t.hasNext()){
 58            
 59            String s=(String) t.next();
 60          //  System.out.println(s+":"+hm.get(s));
 61            if(s.equals("app_gradient_min"))
 62            {
 63                hm.put("app_gradient_min", color_gradient_min);
 64            }
 65            if(s.equals("app_gradient_max"))
 66            {
 67                hm.put("app_gradient_max", color_gradient_max);
 68            }
 69            if(s.equals("app_color_scheme"))
 70            {
 71                hm.put("app_color_scheme", color_gradient_scheme);
 72            }
 73        }
 74      
 75         //print
 76         //        Iterator i=hm.keySet().iterator(); 
 77         //        
 78         //        while(i.hasNext()){
 79         //           String s=(String) i.next();
 80         //           System.out.println(s+":"+hm.get(s));
 81         //         }
 82         
 83                  
 84         //4 encode
 85         if(hm!=null && hm.size()>0){
 86                 try {
 87                     pro.setProperty(gui_preferences,getStringFromObject(hm));
 88                 } catch (IOException e) {
 89                     // TODO Auto-generated catch block
 90                     e.printStackTrace();
 91                 }
 92         }
 93         
 94        //5 save
 95         try {
 96             pro.store(new FileOutputStream(new File(filepath)), "");
 97         } catch (FileNotFoundException e) {
 98             // TODO Auto-generated catch block
 99             e.printStackTrace();
100         } catch (IOException e) {
101             // TODO Auto-generated catch block
102             e.printStackTrace();
103         }
104         
105     }
106     
107      private static Object getObjectFromString(String value) throws IOException, ClassNotFoundException, IOException {
108             Object obj = null;
109             ByteArrayOutputStream out = new ByteArrayOutputStream();
110             ByteArrayInputStream bin = new ByteArrayInputStream(value.getBytes());
111             Base64Coder.decodeStream(bin, out);
112 
113             bin = new ByteArrayInputStream(out.toByteArray());
114             ObjectInputStream is = new ObjectInputStream(bin);
115             obj = is.readObject();
116 
117             return obj;
118         }
119      
120      public static HashMap getMapFromString(String value) {
121             HashMap map = null;
122             if (value != null) {
123                 try {
124                     Object obj = getObjectFromString(value);
125                     if (obj != null) {
126                         if (obj instanceof HashMap) {
127                             map = (HashMap) obj;
128                         }
129                     }
130 
131                 } catch (Exception ex) {
132                     //logger.log(Level.SEVERE, "Can‘t get hash map from string: " + value, ex);
133                     System.out.println("Can‘t get hash map from string: " +   ex);
134                 }
135             }
136             return map;
137         }
138      
139       public static String getStringFromObject(Object obj) throws IOException {
140             String str = null;
141             ByteArrayOutputStream out = new ByteArrayOutputStream();
142             ObjectOutputStream os = new ObjectOutputStream(out);
143             os.writeObject(obj);
144             ByteArrayInputStream bin = new ByteArrayInputStream(out.toByteArray());
145             out.reset();
146             //Base64Encoder be = new Base64Encoder(bin, out);
147             Base64Coder.encodeStream(bin, out);
148             str = out.toString();
149             return str;
150         }
151 }

/**
 * A Base64 Encoder/Decoder.
 *
 * <p>
 * This class is used to encode and decode data in Base64 format as described in RFC 1521.
 *
 * <p>
 * This is "Open Source" software and released under the <a href="http://www.gnu.org/licenses/lgpl.html">GNU/LGPL</a> license.<br>
 * It is provided "as is" without warranty of any kind.<br>
 * Copyright 2003: Christian d‘Heureuse, Inventec Informatik AG, Switzerland.<br>
 * Home page: <a href="http://www.source-code.biz">www.source-code.biz</a><br>
 *
 * <p>
 * Version history:<br>
 * 2003-07-22 Christian d‘Heureuse (chdh): Module created.<br>
 * 2005-08-11 chdh: Lincense changed from GPL to LGPL.<br>
 * 2006-11-21 chdh:<br>
 *  &nbsp; Method encode(String) renamed to encodeString(String).<br>
 *  &nbsp; Method decode(String) renamed to decodeString(String).<br>
 *  &nbsp; New method encode(byte[],int) added.<br>
 *  &nbsp; New method decode(String) added.<br>
 */

import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;

public class Base64Coder {

// Mapping table from 6-bit nibbles to Base64 characters.
    private static char[] map1 = new char[64];


    static {
        int i = 0;
        for (char c = ‘A‘; c <= ‘Z‘; c++) {
            map1[i++] = c;
        }
        for (char c = ‘a‘; c <= ‘z‘; c++) {
            map1[i++] = c;
        }
        for (char c = ‘0‘; c <= ‘9‘; c++) {
            map1[i++] = c;
        }
        map1[i++] = ‘+‘;
        map1[i++] = ‘/‘;
    }

// Mapping table from Base64 characters to 6-bit nibbles.
    private static byte[] map2 = new byte[128];


    static {
        for (int i = 0; i < map2.length; i++) {
            map2[i] = -1;
        }
        for (int i = 0; i < 64; i++) {
            map2[map1[i]] = (byte) i;
        }
    }

    /**
     * Encodes a string into Base64 format.
     * No blanks or line breaks are inserted.
     * @param s  a String to be encoded.
     * @return   A String with the Base64 encoded data.
     */
    public static String encodeString(String s) {
        return new String(encode(s.getBytes()));
    }

    /**
     * Encodes a byte array into Base64 format.
     * No blanks or line breaks are inserted.
     * @param in  an array containing the data bytes to be encoded.
     * @return    A character array with the Base64 encoded data.
     */
    public static char[] encode(byte[] in) {
        return encode(in, in.length);
    }

    /**
     * Encodes a byte array into Base64 format.
     * No blanks or line breaks are inserted.
     * @param in   an array containing the data bytes to be encoded.
     * @param iLen number of bytes to process in <code>in</code>.
     * @return     A character array with the Base64 encoded data.
     */
    public static char[] encode(byte[] in, int iLen) {
        int oDataLen = (iLen * 4 + 2) / 3;       // output length without padding
        int oLen = ((iLen + 2) / 3) * 4;         // output length including padding
        char[] out = new char[oLen];
        int ip = 0;
        int op = 0;
        while (ip < iLen) {
            int i0 = in[ip++] & 0xff;
            int i1 = ip < iLen ? in[ip++] & 0xff : 0;
            int i2 = ip < iLen ? in[ip++] & 0xff : 0;
            int o0 = i0 >>> 2;
            int o1 = ((i0 & 3) << 4) | (i1 >>> 4);
            int o2 = ((i1 & 0xf) << 2) | (i2 >>> 6);
            int o3 = i2 & 0x3F;
            out[op++] = map1[o0];
            out[op++] = map1[o1];
            out[op] = op < oDataLen ? map1[o2] : ‘=‘;
            op++;
            out[op] = op < oDataLen ? map1[o3] : ‘=‘;
            op++;
        }
        return out;
    }

    /**
     * Decodes a string from Base64 format.
     * @param s  a Base64 String to be decoded.
     * @return   A String containing the decoded data.
     * @throws   IllegalArgumentException if the input is not valid Base64 encoded data.
     */
    public static String decodeString(String s) {
        return new String(decode(s));
    }

    /**
     * Decodes a byte array from Base64 format.
     * @param s  a Base64 String to be decoded.
     * @return   An array containing the decoded data bytes.
     * @throws   IllegalArgumentException if the input is not valid Base64 encoded data.
     */
    public static byte[] decode(String s) {
        return decode(s.toCharArray());
    }

    /**
     * Decodes a byte array from Base64 format.
     * No blanks or line breaks are allowed within the Base64 encoded data.
     * @param in  a character array containing the Base64 encoded data.
     * @return    An array containing the decoded data bytes.
     * @throws    IllegalArgumentException if the input is not valid Base64 encoded data.
     */
    public static byte[] decode(char[] in) {
        int iLen = in.length;
        if (iLen % 4 != 0) {
            throw new IllegalArgumentException("Length of Base64 encoded input string is not a multiple of 4.");
        }
        while (iLen > 0 && in[iLen - 1] == ‘=‘) {
            iLen--;
        }
        int oLen = (iLen * 3) / 4;
        byte[] out = new byte[oLen];
        int ip = 0;
        int op = 0;
        while (ip < iLen) {
            int i0 = in[ip++];
            int i1 = in[ip++];
            int i2 = ip < iLen ? in[ip++] : ‘A‘;
            int i3 = ip < iLen ? in[ip++] : ‘A‘;
            if (i0 > 127 || i1 > 127 || i2 > 127 || i3 > 127) {
                throw new IllegalArgumentException("Illegal character in Base64 encoded data.");
            }
            int b0 = map2[i0];
            int b1 = map2[i1];
            int b2 = map2[i2];
            int b3 = map2[i3];
            if (b0 < 0 || b1 < 0 || b2 < 0 || b3 < 0) {
                throw new IllegalArgumentException("Illegal character in Base64 encoded data.");
            }
            int o0 = (b0 << 2) | (b1 >>> 4);
            int o1 = ((b1 & 0xf) << 4) | (b2 >>> 2);
            int o2 = ((b2 & 3) << 6) | b3;
            out[op++] = (byte) o0;
            if (op < oLen) {
                out[op++] = (byte) o1;
            }
            if (op < oLen) {
                out[op++] = (byte) o2;
            }
        }
        return out;
    }

    public static void decodeStream(InputStream in, OutputStream out) throws IOException {
            String s = inputStreamToString(in);
            byte[] buf = decode(s);
            out.write(buf);
    }

    public static String inputStreamToString(InputStream in) throws IOException {
        StringBuffer out = new StringBuffer();
        byte[] b = new byte[4096];
        for (int n; (n = in.read(b)) != -1;) {
            out.append(new String(b, 0, n));
        }
        return out.toString();
    }

    public static void encodeStream(InputStream in, OutputStream out) throws IOException {
        int lineLength = 72;
        byte[] buf = new byte[lineLength / 4 * 3];
        while (true) {
            int len = in.read(buf);
            if (len <= 0) {
                break;
            }
            String str = new String(encode(buf, len));
            out.write(str.getBytes());
        }

    }
// Dummy constructor.
    private Base64Coder() {
    }
} // end class Base64Coder