Getting error "Turn your Session into FlushMode.COMMIT/AUTO or remove 'readOnly' marker from transaction definition"
<p>I'm getting the error:</p>

<blockquote>
  <p>Write operations are not allowed in read-only mode (FlushMode.MANUAL): Turn your Session into FlushMode.COMMIT/AUTO or remove 'readOnly' marker from transaction definition.</p>
</blockquote>

<p><strong>LoginController.java</strong></p>

<pre><code>@Controller

public class LoginController {

@Autowired

private RegisterDao dao;

@RequestMapping(value = "registerpage", method = RequestMethod.GET)

public ModelAndView getRegisterPage() {

    System.out.println("control is in getRegister method");

    return new ModelAndView("register", "reg", new Register());
}


@RequestMapping(value = "registeruser", method = RequestMethod.POST)
public ModelAndView registerUser(HttpServletRequest request) {

    System.out.println("control is in registeruser method");

    Register register = new Register();

    register.setUname(request.getParameter("uname"));
    register.setPassword(request.getParameter("password"));
    register.setEmail(request.getParameter("email"));
    register.setDob(request.getParameter("dob"));
    register.setAge(request.getParameter("age"));
    register.setCountry(request.getParameter("country"));



    dao.addUser(register);

    return new ModelAndView("success");
}

@RequestMapping(value = "delete", method = RequestMethod.GET)
public ModelAndView delete() {

    return new ModelAndView("delete");
}

@RequestMapping(value = "deleteUser", method = RequestMethod.DELETE)

public void deleteUser(@RequestParam("uname") String uname, ModelMap map) {

    Register register = new Register();
    register.setUname(uname);
    dao.deleteUser(register);

}

@RequestMapping(value = "readUsers", method = RequestMethod.GET)

public List&lt;Register&gt; usersList(ModelMap map) {

    List&lt;Register&gt; register = dao.readUsers();

    map.addAttribute("Users", register);

    return register;
}
}
</code></pre>

<p><strong>Register.java</strong></p>

<pre><code>`package com.spring.dao;

import java.util.List;

import com.spring.model.Register;

public interface RegisterDao {
public void addUser(Register register);

public List&lt;Register&gt; readUsers();

public void deleteUser(Register register);

}
</code></pre>

<p>Spring-servlet.xml</p>

<pre><code>&lt;context:component-scan base-package="com.spring" /&gt;

&lt;mvc:annotation-driven /&gt;

&lt;tx:annotation-driven /&gt;

&lt;tx:annotation-driven transaction-manager="transactionManager" /&gt;

&lt;bean id="handlerMapping" class="org.springframework.web.servlet.handler.BeanNameUrlHandlerMapping"&gt;&lt;/bean&gt;

&lt;bean id="viewResolver"
    class="org.springframework.web.servlet.view.InternalResourceViewResolver"&gt;
    &lt;property name="prefix" value="/" /&gt;
    &lt;property name="suffix" value=".jsp" /&gt;
&lt;/bean&gt;


&lt;bean id="template" class="org.springframework.orm.hibernate5.HibernateTemplate"&gt;
    &lt;property name="sessionFactory" ref="sessionFactory" /&gt;
&lt;/bean&gt;

&lt;bean class="org.springframework.orm.hibernate5.LocalSessionFactoryBean"
    id="sessionFactory"&gt;
    &lt;property name="dataSource" ref="dataSource"&gt;&lt;/property&gt;
    &lt;property name="annotatedClasses"&gt;
        &lt;list&gt;
            &lt;value&gt;com.spring.model.Register&lt;/value&gt;
        &lt;/list&gt;
    &lt;/property&gt;
    &lt;property name="hibernateProperties"&gt;
        &lt;props&gt;
            &lt;prop key="hibernate.dialect"&gt;org.hibernate.dialect.Oracle10gDialect&lt;/prop&gt;
            &lt;prop key="hibernate.show_sql"&gt;true&lt;/prop&gt;

        &lt;/props&gt;
    &lt;/property&gt;
&lt;/bean&gt;
&lt;bean id="dataSource"
    class="org.springframework.jdbc.datasource.DriverManagerDataSource"&gt;
    &lt;property name="driverClassName" value="oracle.jdbc.driver.OracleDriver" /&gt;
    &lt;property name="url" value="jdbc:oracle:thin:@localhost:1521:xe" /&gt;
    &lt;property name="username" value="scott" /&gt;
    &lt;property name="password" value="tiger" /&gt;
&lt;/bean&gt;
</code></pre>

<p></p>

<pre><code>@Service
public class RegisterDaoImpl implements RegisterDao {

@Autowired

private HibernateTemplate template;

public void addUser(Register register,HttpServletRequest request,HttpServletResponse response) {
    // TODO Auto-generated method stub

    System.out.println("control is in adduser method of daoimpl");


    template.saveOrUpdate(register);

}

public List&lt;Register&gt; readUsers() {
    // TODO Auto-generated method stub

    System.out.println("control is in readuser method of daoimpl");

    List&lt;Register&gt; list = template.loadAll(Register.class);
    return list;
}

public void deleteUser(Register register) {
    // TODO Auto-generated method stub

    System.out.println("control is in deleteuser method of daoimpl");

    template.delete(register);

}

public void addUser(Register register) {
    // TODO Auto-generated method stub

    template.save(register);

}
}

pom.xml 
</code></pre>

<p>http://maven.apache.org/xsd/maven-4.0.0.xsd">
    4.0.0</p>

<pre><code>&lt;groupId&gt;com.spring&lt;/groupId&gt;
&lt;artifactId&gt;RegistrationWithSpringMvc&lt;/artifactId&gt;
&lt;packaging&gt;war&lt;/packaging&gt;
&lt;version&gt;0.0.1-SNAPSHOT&lt;/version&gt;

&lt;name&gt;RegistrationWithSpringMvc&lt;/name&gt;
&lt;url&gt;http://maven.apache.org&lt;/url&gt;


&lt;dependencies&gt;
    &lt;!-- https://mvnrepository.com/artifact/org.springframework/spring-webmvc --&gt;
    &lt;dependency&gt;
        &lt;groupId&gt;org.springframework&lt;/groupId&gt;
        &lt;artifactId&gt;spring-webmvc&lt;/artifactId&gt;
        &lt;version&gt;4.3.2.RELEASE&lt;/version&gt;
    &lt;/dependency&gt;
    &lt;!-- https://mvnrepository.com/artifact/org.springframework/spring-web --&gt;
    &lt;dependency&gt;
        &lt;groupId&gt;org.springframework&lt;/groupId&gt;
        &lt;artifactId&gt;spring-web&lt;/artifactId&gt;
        &lt;version&gt;4.3.2.RELEASE&lt;/version&gt;
    &lt;/dependency&gt;
    &lt;!-- https://mvnrepository.com/artifact/com.hynnet/oracle-driver-ojdbc6 --&gt;
    &lt;dependency&gt;
        &lt;groupId&gt;com.oracle&lt;/groupId&gt;
        &lt;artifactId&gt;ojdbc6&lt;/artifactId&gt;
        &lt;version&gt;11.2.0&lt;/version&gt;
    &lt;/dependency&gt;

    &lt;!-- https://mvnrepository.com/artifact/org.springframework/spring-orm --&gt;
    &lt;dependency&gt;
        &lt;groupId&gt;org.springframework&lt;/groupId&gt;
        &lt;artifactId&gt;spring-orm&lt;/artifactId&gt;
        &lt;version&gt;4.3.2.RELEASE&lt;/version&gt;
    &lt;/dependency&gt;
    &lt;!-- https://mvnrepository.com/artifact/org.hibernate/hibernate-entitymanager --&gt;
    &lt;dependency&gt;
        &lt;groupId&gt;org.hibernate&lt;/groupId&gt;
        &lt;artifactId&gt;hibernate-entitymanager&lt;/artifactId&gt;
        &lt;version&gt;4.3.2.Final&lt;/version&gt;
    &lt;/dependency&gt;


    &lt;!-- https://mvnrepository.com/artifact/org.hibernate/hibernate-validator --&gt;
    &lt;dependency&gt;
        &lt;groupId&gt;org.hibernate&lt;/groupId&gt;
        &lt;artifactId&gt;hibernate-validator&lt;/artifactId&gt;
        &lt;version&gt;5.2.4.Final&lt;/version&gt;
    &lt;/dependency&gt;
    &lt;dependency&gt;
        &lt;groupId&gt;org.hibernate&lt;/groupId&gt;
        &lt;artifactId&gt;hibernate-core&lt;/artifactId&gt;
        &lt;version&gt;5.2.0.Final&lt;/version&gt;
    &lt;/dependency&gt;
    &lt;dependency&gt;
        &lt;groupId&gt;javax.servlet&lt;/groupId&gt;
        &lt;artifactId&gt;servlet-api&lt;/artifactId&gt;
        &lt;version&gt;2.5&lt;/version&gt;
        &lt;scope&gt;provided&lt;/scope&gt;
    &lt;/dependency&gt;
    &lt;!-- https://mvnrepository.com/artifact/javax.servlet/jstl --&gt;
    &lt;dependency&gt;
        &lt;groupId&gt;javax.servlet&lt;/groupId&gt;
        &lt;artifactId&gt;jstl&lt;/artifactId&gt;
        &lt;version&gt;1.2&lt;/version&gt;
    &lt;/dependency&gt;
    &lt;!-- https://mvnrepository.com/artifact/org.slf4j/slf4j-api --&gt;
&lt;dependency&gt;
    &lt;groupId&gt;org.slf4j&lt;/groupId&gt;
    &lt;artifactId&gt;slf4j-api&lt;/artifactId&gt;
    &lt;version&gt;1.7.21&lt;/version&gt;
&lt;/dependency&gt;

&lt;dependency&gt;
    &lt;groupId&gt;org.jboss.logging&lt;/groupId&gt;
    &lt;artifactId&gt;jboss-logging&lt;/artifactId&gt;
    &lt;version&gt;3.3.0.Final&lt;/version&gt;
&lt;/dependency&gt;

&lt;/dependencies&gt;
&lt;build&gt;
    &lt;plugins&gt;
        &lt;plugin&gt;
            &lt;groupId&gt;org.apache.maven.plugins&lt;/groupId&gt;
            &lt;artifactId&gt;maven-compiler-plugin&lt;/artifactId&gt;
            &lt;version&gt;2.0.2&lt;/version&gt;
            &lt;configuration&gt;
                &lt;source&gt;1.5&lt;/source&gt;
                &lt;target&gt;1.5&lt;/target&gt;
            &lt;/configuration&gt;
        &lt;/plugin&gt;
    &lt;/plugins&gt;
&lt;/build&gt;
</code></pre>

<p></p>