Java tutorial
/* * To change this license header, choose License Headers in Project Properties. * To change this template file, choose Tools | Templates * and open the template in the editor. */ package br.com.munif.ffjma; import com.fasterxml.jackson.databind.ObjectMapper; import java.io.IOException; import java.util.HashMap; import java.util.Map; import javax.servlet.ServletException; import javax.servlet.annotation.WebServlet; import javax.servlet.http.HttpServlet; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; /** * * @author munif */ @WebServlet(name = "FreeFormApi", urlPatterns = { "/api/*" }) public class FreeFormApi extends HttpServlet { private final ObjectMapper mapper = new ObjectMapper(); @Override protected void doTrace(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException { super.doTrace(req, resp); //To change body of generated methods, choose Tools | Templates. } @Override protected void doOptions(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException { super.doOptions(req, resp); //To change body of generated methods, choose Tools | Templates. } @Override protected void doDelete(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException { super.doDelete(req, resp); //To change body of generated methods, choose Tools | Templates. } @Override protected void doPut(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException { super.doPut(req, resp); //To change body of generated methods, choose Tools | Templates. } @Override protected void doPost(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException { super.doPost(req, resp); //To change body of generated methods, choose Tools | Templates. } @Override protected void doHead(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException { super.doHead(req, resp); //To change body of generated methods, choose Tools | Templates. } @Override protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException { System.out.println(getCollection(req)); resp.setCharacterEncoding("UTF-8"); Map<String, Object> map = new HashMap<String, Object>(); map.put("mensagem", "ola mundo!"); mapper.writeValue(resp.getOutputStream(), map); resp.getOutputStream().close(); } @Override public String getServletName() { return "ffjma"; } @Override public String getServletInfo() { return "Free Form Java Mongo API"; } private String getCollection(HttpServletRequest req) { String uri = req.getRequestURI(); return uri.replaceFirst(".*/api/", "").replaceFirst("/.*", ""); } }