Hello, world

The WebWind version of 'Hello, world' sample is very simple. See:

import org.expressme.webwind.Mapping;

public class MyPage {

    @Mapping("/hello")
    public String hello() {
        return "<h1>Hello, world</h1>";
    }
}

Note that WebWind does NOT require any framework-provided interface known as Action or Controller. URL mapping is defined on method by Java 5 annotation.

Now make sure this JavaBean is managed by your IoC container. Start web server and see web page in browser:

Passing parameters

Let's do little extension to make it say 'Hello' to everyone. You can do it by adding a parameter like /hello?name=michael, and handle the parameter by yourself in old-style MVC frameworks. But is it simple and friendly if URL is /hello/michael:

@Mapping("/hello/$1")
public String hello(String name) {
    return "<h1>Hello, " + name + "</h1>";
}

The web page in browser is shown as follow:

You may guess that the $1 is the parameter in URL and passed automatically to the first argument name in method hello(String). That's right.

The two methods can be placed together, both works well:

import org.expressme.webwind.Mapping;

public class MyPage {

    @Mapping("/hello")
    public String hello() {
        return "<h1>Hello, world</h1>";
    }

    @Mapping("/hello/$1")
    public String hello(String name) {
        return "<h1>Hello, " + name + "</h1>";
    }
}

Let's get into the details of URL mapping.