how do I iterate through multiple properties in jsp

Question

I\'m trying to iterate through a set of keys in a properties file, so that only the \"message.pX\" is output.

a.property=foo
message.p1=a
message.p2=b
message.p3         


        

Answer 1

Properties properties = new Properties();
        try {
            properties.load(new FileInputStream("filename.properties"));
        } catch (IOException e) {
        }

        Enumeration e = properties.propertyNames();

        while (e.hasMoreElements()) {
            String key = (String) e.nextElement();
            //Edited answer
            if(key.indexOf("message.p") != -1 ){
               System.out.println(key + " , " + properties.getProperty(key));
               //Add key and value to a list
            }
            //Edited answer

        }

I suggest you to do this inside a Servlet or a Java class and store the properties list in a java.lang.List object such as an ArrayList or LinkedList then send the result to the jsp. Avoid doing this inside the jsp.