java - Can't insert item in database using servlet -

i trying insert values table of database using servlet , jsp , mysql workbench database. when fill in form , submit, shows blank screen, no output displayed , in database values not updated.these following details:

1) controller.java

public class controller extends httpservlet {  protected void processrequest(httpservletrequest request, httpservletresponse response)         throws servletexception, ioexception, sqlexception {     response.setcontenttype("text/html;charset=utf-8");     try (printwriter out = response.getwriter()) {         string dburl = getservletcontext().getinitparameter("dburl");         string dbuser = getservletcontext().getinitparameter("dbuser");         string dbpassword = getservletcontext().getinitparameter("dbpassword");         string dbdriver = getservletcontext().getinitparameter("dbdriver");          connection conn = dao.getconnectionjdbc(dburl, dbuser, dbpassword, dbdriver);          string title = request.getparameter("title");         string actor = request.getparameter("actor");         string actress = request.getparameter("actress");         string genre = request.getparameter("genre");         string year = string.valueof("year");          string querymessage = "insert movies (title, actor, actress,genre,year)"                 + "values (" + title + ",'" + actor + "','" + actress + "','"                 + genre + "','" + year + "')";          statement statement = conn.createstatement();         int result = statement.executeupdate(querymessage);         conn.close();         if (result > 0) {             requestdispatcher rd = request.getrequestdispatcher("/added.jsp");             rd.forward(request, response);         }      } }   protected void dopost(httpservletrequest request, httpservletresponse   response)         throws servletexception, ioexception {     try {         processrequest(request, response);     } catch (sqlexception ex) {         logger.getlogger(controller.class.getname()).log(level.severe, null, ex);     } } 

2) dao.java

public class dao {  public static connection getconnectionjdbc(string dburl, string dbuser,string dbpassword, string dbdriver) throws ioexception {     connection connection = null;     try {         class.forname(dbdriver);     } catch (classnotfoundexception e) {         system.out.println("where mysql jdbc driver?");     }     try {         connection = drivermanager.getconnection(dburl,dbuser,dbpassword);     } catch (sqlexception e) {         system.out.println("connection failed! check output console");     }      if (connection != null) {         system.out.println("connection established");     }     return connection; } 

}

3) addmovie.jsp

<form action="controller" method="post"> code insert in text box </form> 

4) web.xml

<?xml version="1.0" encoding="utf-8"?> <web-app version="3.1" xmlns="http://xmlns.jcp.org/xml/ns/javaee"      xmlns:xsi="http://www.w3.org/2001/xmlschema-instance" xsi:schemalocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_3_1.xsd"> <servlet>     <servlet-name>controller</servlet-name>     <servlet-class>com.myapp.controller.controller</servlet-class> </servlet> <servlet-mapping>     <servlet-name>controller</servlet-name>     <url-pattern>/controller</url-pattern> </servlet-mapping> <session-config>     <session-timeout>         30     </session-timeout> </session-config> <context-param>     <param-name>dbuser</param-name>     <param-value>root</param-value> </context-param> <context-param>     <param-name>dbpassword</param-name>     <param-value>root</param-value> </context-param> <context-param>     <param-name>dbdriver</param-name>     <param-value>com.mysql.jdbc.driver</param-value> </context-param> <context-param>     <param-name>dburl</param-name>     <param-value>jdbc:mysql://localhost:3306/moviedb</param-value> </context-param>