Untitled

package main.java.com.caesar_84.smvctest.controller;

import main.java.com.caesar_84.smvctest.model.User;
import main.java.com.caesar_84.smvctest.service.UserService;
import main.java.com.caesar_84.smvctest.wrappers.IntWrapper;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Qualifier;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.ModelAttribute;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;

/**
 * Created by caesar-84 on 2/10/17.
 */
@Controller
public class UserController
{
private UserService userService;
private Integer lastPassedIdParam = 0;

@Autowired(required = true)
@Qualifier(value = "userService")
public void setUserService(UserService userService) {
    this.userService = userService;
}

@RequestMapping(value = "userlist", method = RequestMethod.GET)
public String userList(Model model)
{
    model.addAttribute("user", new User());
    model.addAttribute("userList", userService.userList());

    return "userlist";
}

@RequestMapping(value = "users", method = RequestMethod.GET)
public String users(Model model)
{
    model.addAttribute("user", new User());

    return "users";
}

@RequestMapping(value = "users/add", method = RequestMethod.POST)
public String addUser(@ModelAttribute("user") User user)
{
    if (user.getId() == 0) userService.addUser(user);
    else userService.updateUser(user);

    return "redirect:/users";
}

@RequestMapping(value = "/remove/{id}")
public String removeUser(@PathVariable("id") int id)
{
    userService.deleteUser(id);

    return "redirect:/users";
}

@RequestMapping(value = "edit/{id}")
public String editUser(@PathVariable("id") int id, Model model)
{
    model.addAttribute("user", userService.getUserById(id));

    return "users";
}

@RequestMapping(value = "/userdata")
public String userData(Model model)
{
    model.addAttribute("user", userService.getUserById(lastPassedIdParam));

    return "userdata";
}

@RequestMapping(value = "finduser")
public String findUserPage(Model model)
{
    model.addAttribute("idParam", new IntWrapper());
    lastPassedIdParam = ((IntWrapper)model.asMap().get("idParam")).getValue();

    return "finduser";
}

@RequestMapping(value = "passidparam")
public String passParam()
{
    return "redirect:/userdata";
}
}

<%--
  Created by IntelliJ IDEA.
  User: caesar-84
  Date: 2/11/17
  Time: 4:30 PM
  To change this template use File | Settings | File Templates.
--%>
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<%@ taglib uri="http://www.springframework.org/tags" prefix="spring" %>
<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
<%@ taglib uri="http://www.springframework.org/tags/form" prefix="form" %>
<html>
<head>
    <title>Find User</title>
    <style>
        <%@include file='styles/main.css'%>
    </style>
</head>
<body class="general">

<h3>Find a user</h3>

<c:url var="findAction" scope="request" value="passidparam"/>
<form:form action="${findAction}" commandName="idParam">
    <table>
        <tr>
            <td>
                <form:label path="value">
                    <spring:message text="Enter user id to find him"/>
                </form:label>
            </td>
            <td>
                <form:input path="value" maxlength="8" size="3"/>
            </td>
        </tr>
        <tr>
            <td colspan="2">
                <input type="submit" value="<spring:message text="Find"/>"/>
            </td>
        </tr>
    </table>
</form:form>
<br/>
<a href="/userlist">See all users</a>
<br/>
<a href="../../index.jsp">Back home</a>
</body>
</html>

<web-app
    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"
    version="3.1">

<servlet>
    <servlet-name>mvc-dispatcher</servlet-name>
    <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
    <load-on-startup>1</load-on-startup>
</servlet>
<servlet-mapping>
    <servlet-name>mvc-dispatcher</servlet-name>
    <url-pattern>/</url-pattern>
</servlet-mapping>

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
       xmlns:context="http://www.springframework.org/schema/context"
       xmlns:tx="http://www.springframework.org/schema/tx"
       xmlns:mvc="http://www.springframework.org/schema/mvc"
           xsi:schemaLocation="http://www.springframework.org/schema/beans
                       http://www.springframework.org/schema/beans/spring-beans.xsd
                       http://www.springframework.org/schema/context
                       http://www.springframework.org/schema/context/spring-context.xsd
                       http://www.springframework.org/schema/tx
                       http://www.springframework.org/schema/tx/spring-tx.xsd
                       http://www.springframework.org/schema/mvc
                       http://www.springframework.org/schema/mvc/spring-mvc.xsd">

<context:component-scan base-package="main.java.com.caesar_84.smvctest"/>

<bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
    <property name="prefix" value="/WEB-INF/pages/"/>
    <property name="suffix" value=".jsp"/>
</bean>

<!-- Database info -->
<bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource" destroy-method="close">
    <property name="driverClassName" value="com.mysql.jdbc.Driver"/>
    <property name="url" value="jdbc:mysql://localhost:3306/sample_schema"/>
    <property name="username" value="*****"/>
    <property name="password" value="*****"/>
</bean>

<!-- Hibernate session factory -->
<bean id="hibernate5AnnotationSessionFactory"
      class="org.springframework.orm.hibernate5.LocalSessionFactoryBean">
    <property name="dataSource" ref="dataSource"/>
    <property name="annotatedClasses">
        <list>
            <value>main.java.com.caesar_84.smvctest.model.User</value>
        </list>
    </property>
    <property name="hibernateProperties">
        <props>
            <prop key="hibernate.dialect">org.hibernate.dialect.MySQLDialect</prop>
            <prop key="hibernate.show_sql">true</prop>
        </props>
    </property>
</bean>

<!-- DAO and services -->
<bean id="userDAO" class="main.java.com.caesar_84.smvctest.dao.UserDAOImpl">
    <property name="sessionFactory" ref="hibernate5AnnotationSessionFactory"/>
</bean>
<bean id="userService" class="main.java.com.caesar_84.smvctest.service.UserServiceImp">
    <property name="userDAO" ref="userDAO"/>
</bean>

<context:component-scan base-package="main.java.com.caesar_84.smvctest"/>
<tx:annotation-driven transaction-manager="transactionManager"/>

<bean id="transactionManager" class="org.springframework.orm.hibernate5.HibernateTransactionManager">
    <property name="sessionFactory" ref="hibernate5AnnotationSessionFactory"/>
</bean>

<mvc:default-servlet-handler/>
<mvc:annotation-driven/>

package main.java.com.caesar_84.smvctest.wrappers;

import java.util.Objects;

/**
 * Created by caesar-84 on 2/11/17.
 */
public class IntWrapper
{
    private Integer value;

public IntWrapper() {}

public Integer getValue() {
    return value;
}

public void setValue(Integer value) {
    this.value = value;
}

@Override
public String toString() { return value.toString(); }

@Override
public boolean equals(Object o) {
    if (this == o) return true;
    if (!(o instanceof IntWrapper)) return false;
    IntWrapper that = (IntWrapper) o;
    return Objects.equals(getValue(), that.getValue());
}

@Override
public int hashCode() {
    return Objects.hash(getValue());
}
}

org.springframework.web.util.NestedServletException: Request processing failed; nested exception is java.lang.NullPointerException
org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:982)
org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:861)
javax.servlet.http.HttpServlet.service(HttpServlet.java:622)
org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:846)
javax.servlet.http.HttpServlet.service(HttpServlet.java:729)
org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
root cause

java.lang.NullPointerException
main.java.com.caesar_84.smvctest.controller.UserController.userData(UserController.java:75)
sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
java.lang.reflect.Method.invoke(Method.java:498)
org.springframework.web.method.support.InvocableHandlerMethod.doInvoke(InvocableHandlerMethod.java:220)
org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:134)
org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:116)
org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandlerMethod(RequestMappingHandlerAdapter.java:827)
org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:738)
org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:85)
org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:963)
org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:897)
org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:970)
org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:861)
javax.servlet.http.HttpServlet.service(HttpServlet.java:622)
org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:846)
javax.servlet.http.HttpServlet.service(HttpServlet.java:729)
org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)