JRubyEncodingServlet.java

package test;

import java.io.IOException;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.jruby.CompatVersion;
import org.jruby.embed.LocalContextScope;
import org.jruby.embed.ScriptingContainer;

public class JRubyEncodingServlet extends HttpServlet {
    public static void main(String[] args) {
        // Initialize the scripting container
        ScriptingContainer container = new ScriptingContainer(LocalContextScope.SINGLETHREAD);
        // Set the compatibility version to 1.9, for proper UTF-8 support
        container.setCompatVersion(CompatVersion.RUBY1_9);
        container.runScriptlet("# encoding: utf-8\nputs 'π'");
        container.runScriptlet("# encoding: utf-8\nputs 'π'.bytes.to_a.inspect");
        // Prints:
        //   π
        //   [207, 128]
    }

    @Override
    protected void doGet(HttpServletRequest request, HttpServletResponse response)
    throws ServletException, IOException {
        // Initialize the scripting container
        ScriptingContainer container = new ScriptingContainer(LocalContextScope.SINGLETHREAD);
        // Set the compatibility version to 1.9, for proper UTF-8 support
        container.setCompatVersion(CompatVersion.RUBY1_9);
        container.runScriptlet("# encoding: utf-8\nputs 'π'");
        container.runScriptlet("# encoding: utf-8\nputs 'π'.bytes.to_a.inspect");
        // Prints:
        //   ?
        //   [63]
    }
}