JS Java escape and Unescape Functions

JavaScript code involves three functions: Escape, encodeuri, and encodeuricomponent. The corresponding three decoding functions are: Unescape, decodeuri, and decodeuricomponent.

1. encodeuricomponent is required when passing parameters so that the combined URL will not be truncated by special characters such.

Example: <script language = "JavaScript"> document. Write ('<a href = "http://passport.baidu.com /? Logout & Aid = 7 & U = '+ encodeuricomponent ("http://cang.baidu.com/bruce42") +' "> exit </a> '); </SCRIPT>

2. encodeuri can be used for URL redirection.

Example: location. href = encodeuri ("http://cang.baidu.com/do/s? WORD = Baidu & Ct = 21 ");

3. You can use escape when JS uses data.

[Edit huoho. com]

For example, search for the history record in the bucket.

4. When encoding Unicode values other than 0-, escape outputs % u *** format. In other cases, escape, encodeuri, and encodeuricomponent have the same encoding result.

The most commonly used format is encodeuricomponent, which converts special characters such as Chinese and Korean into UTF-8 URL encoding, therefore, if you want to use encodeuricomponent to transmit parameters to the backend, you must use backend decoding to support UTF-8 (the encoding method in form is the same as that on the current page)

Escape unencoded characters are 69: *, +,-,.,/, @, _, 0-9, A-Z, A-Z

Encodeuri is not encoded with 82 characters :!, #, $, &, ', (,), *, +,-,.,/,:,;, = ,?, @,_,~, 0-9, A-Z, A-Z

Encodeuricomponent has 71 unencoded characters :!, ',(,),*,-,.,_,~, 0-9, A-Z, A-Z

 

 

 

Java.net. urldecoder/java.net. urlencoder
What corresponds to the Javascript encodeuri/decodeuri and encodeuricomponent/decodeuricomponent?

 
The following Java corresponds to the Javascript escape/Unescape.

Java-based escape and Unescape Functions

class  EscapeUnescape {  public static String  escape (String src)  {   int i;   char j;   StringBuffer tmp = new StringBuffer();   tmp.ensureCapacity(src.length()*6);   for (i=0;i<src.length() ;i++ )   {    j = src.charAt(i);    if (Character.isDigit(j) || Character.isLowerCase(j) || Character.isUpperCase(j))     tmp.append(j);    else     if (j<256)     {     tmp.append( "%" );     if (j<16)      tmp.append( "0" );     tmp.append( Integer.toString(j,16) );     }     else     {     tmp.append( "%u" );     tmp.append( Integer.toString(j,16) );     }   }   return tmp.toString();  }  public static String  unescape (String src)  {   StringBuffer tmp = new StringBuffer();   tmp.ensureCapacity(src.length());   int  lastPos=0,pos=0;   char ch;   while (lastPos<src.length())   {    pos = src.indexOf("%",lastPos);    if (pos == lastPos)     {     if (src.charAt(pos+1)=='u')      {      ch = (char)Integer.parseInt(src.substring(pos+2,pos+6),16);      tmp.append(ch);      lastPos = pos+6;      }     else      {      ch = (char)Integer.parseInt(src.substring(pos+1,pos+3),16);      tmp.append(ch);      lastPos = pos+3;      }     }    else     {     if (pos == -1)      {      tmp.append(src.substring(lastPos));      lastPos=src.length();      }     else      {      tmp.append(src.substring(lastPos,pos));      lastPos=pos;      }     }   }   return tmp.toString();  }  public static void main(String[] args)  {   String tmp="~!@#$%^&*()_+|\\=-,./?><;'][{}\"";   System.out.println("testing escape : "+tmp);   tmp =escape(tmp);   System.out.println(tmp);   System.out.println("testing unescape :"+tmp);   System.out.println(unescape(tmp));  } }