字符串（中文英文）转二进制及二进制转回字符串（中文英文）--加密准备

 1 import java.io.UnsupportedEncodingException;
 2 
 3 public class EncryptionPrepare {
 4     /*
 5      * 转为二进制
 6      */
 7     public static String toBinary(String str,String split){
 8          
 9           char[] strChar=str.toCharArray();
10           StringBuffer tempStr=new StringBuffer();
11           int length=strChar.length;
12           for(int i=0;i<length;i++){
13               tempStr.append(Integer.toBinaryString(strChar[i]));
14               tempStr.append(split);
15           }          
16           return tempStr.toString();
17         }
18     /*
19      * 转成中英文
20      */
21     public static String toNormalStr(String str){
22         byte[] bs = new byte[str.length() / 2];
23         int len = bs.length;
24         if (len == 1) {
25             bs[0] = (byte) Integer.parseInt(str.substring(0, 2), 16);
26             try {
27                 return new String(bs, "utf-8");
28             } catch (UnsupportedEncodingException e) {
29                 e.printStackTrace();
30             }
31         }else if (len == 2) {
32             for (int i = 0; i < len; i++) {
33                 bs[i] = (byte) Integer.parseInt(
34                         str.substring(i<<1, (i<<1) + 2), 16);            
35　　　　　　　　　　}
36             try {
37                 return new String(bs, "utf-16");
38             } catch (UnsupportedEncodingException e) {
39                 e.printStackTrace();
40             }
41         } 
42             return "wrong";
43 
44     }
45     /*
46      * 获取中英文
47      */
48     public static String getNormalStr(String str,String split){
49         String[] tempStr = StrToStrArray(str,split); 
50         StringBuffer strBuffer=new StringBuffer();
51         int len=tempStr.length;
52           for (int i = 0; i < len; i++) {
53               strBuffer.append(toNormalStr(Integer.toHexString(Integer.parseInt(tempStr[i], 2))));        
54           }        
55         return strBuffer.toString();
56         
57     }
58     /*
59      * 以不同字符分割
60      */
61      private static String[] StrToStrArray(String str,String split) {           
62             return str.split(split);  
63         } 
64      //测试
65     public static void main(String[] args) throws UnsupportedEncodingException {
66         System.out.println(EncryptionPrepare.toBinary("1网this测试一下jk%"," "));
67         System.out.println(EncryptionPrepare.getNormalStr("110001 111111101010001 1110100 1101000 1101001 1110011 110110101001011 1000101111010101 100111000000000 100111000001011 1101010 1101011 100101"," "));
68     
69     }
70 }