Java encoding similiar to JavaScript encodeURIComponent

You may have a REST service that returns an encoded output to a JavaScript client which decodes this output in the client side. Unfortunately, this scenario will not always work because of the mismatch between both the Java java.net.URLEncoder encode() API and the JavaScript encodeURIComponent().

To be able to make the java.net.URLEncoder encode() behavior equivalent to the JavaScript encodeURIComponent(), all what you should do is the following String replacements.

public static String encodeURIComponent(String component)   {     
	String result = null;      
	
	try {       
		result = URLEncoder.encode(component, "UTF-8")   
			   .replaceAll("\\%28", "(")                          
			   .replaceAll("\\%29", ")")   		
			   .replaceAll("\\+", "%20")                          
			   .replaceAll("\\%27", "'")   			   
			   .replaceAll("\\%21", "!")
			   .replaceAll("\\%7E", "~");     
	catch (UnsupportedEncodingException e) {       
		result = component;     
	}      
	
	return result;   
}   

After that you can safely decode the output in the client side using the JavaScript decodeURIComponent().

References:

http://stackoverflow.com/questions/607176/java-equivalent-to-javascripts-encodeuricomponent-that-produces-identical-outpu

https://developer.mozilla.org/en/JavaScript/Reference/Global_Objects/encodeURIComponent

http://docs.oracle.com/javase/1.4.2/docs/api/java/net/URLEncoder.html