Spring MVC

[whole lichen]

Can Anyone Help here is the Code https://sourceb.in/fAubNQGQlP , Error : https://sourceb.in/idUMswCvoH

[glad spear]

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[whole lichen]

@floral stratus hey bro can u help me please

[crisp rock]

Caused by: java.lang.NoClassDefFoundError: antlr/collections/List

That's your problem.

[glad spear]

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[exotic pelican]

hey, i think your implementation class is having mistake

try to rewrite your impl methods

[glad spear]

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[whole lichen]

can u please ellaborate ? @exotic pelican

@floral stratus hey broo can u look 0ver it and check the error bcz i am really stuck into it .

[floral stratus]

.

[whole lichen]

But i remove the class and found some other error that looks like this https://sourceb.in/fNII4Iux9

@floral stratus

[floral stratus]

What's the pom.xml? How do you run the application?

[whole lichen]

On server

and here is the pom.xml '

@floral stratus

[floral stratus]

I asked how, not where

and you don't need to ping me

[whole lichen]

How do u run the application? Means

[floral stratus]

Why are you using version 5.3.20 for spring-orm as opposed to 5.3.18?

[floral stratus]

How you are running the application

mvn spring-boot:run?

Do you deploy a WAR file?

[whole lichen]

No it's not a spring boot app it's spring MVC project

[whole lichen]

No

[floral stratus]

So how are you doing it?

[whole lichen]

I am deploy it to the tomcat server

[floral stratus]

and how?

[floral stratus]

Does that mean it isn't a WAR file?

[whole lichen]

Basically I am adding the project to the tomcat server like this

[floral stratus]

ok that's what I wanted to know

[floral stratus]

What about that?

Is there a reason for this?

[whole lichen]

Like I think this is the only way to start a project in spring MVC or in Servlets?

[crisp rock]

One of many 😄

[whole lichen]

So is this the actual reason why the error is coming?

[floral stratus]

I want to know about this

this could be the reason for the error

[floral stratus]

Unlikely

[whole lichen]

But now I have changed it

[floral stratus]

what did you change to what?

[crisp rock]

No idea, it seems that you removed the error.

[whole lichen]

From the version 5.3.20 to 5.3.18 of spring orm

[whole lichen]

.

[floral stratus]

Did that change anything?

Are you getting the same error again?

[whole lichen]

https://sourceb.in/SmRvywOPb7

here is the error

in think it is now changed

this is now how the code looks like https://sourceb.in/8OJ660Ck38

[floral stratus]

ok that seems somewhat better

looks like the HibernateTemplate has an issue

[whole lichen]

Like how bcz i have provided it everything that it wants ...

[floral stratus]

https://stackoverflow.com/q/62682613/10871900

[whole lichen]

there was only one single answer Hibernate Bean Configuration File was not loaded in Web.xml file. and i think its correct in my project

[crisp rock]

I don't know if beans defined in XML are any different, but you can try adding @Qualifier("hibernateTemplate")

[whole lichen]

Nahh that doesn't work

[floral stratus]

Do you have a web.xml?

[whole lichen]

Yehh

         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">

<absolute-ordering></absolute-ordering>
    <servlet>
        <servlet-name>LoginPage</servlet-name>
        <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
        
        <init-param>
        <param-name>contextConfigLocation</param-name>
        <param-value>/WEB-INF/dispatcherservlet.xml</param-value>
    </init-param>
    
        <load-on-startup>1</load-on-startup>
    </servlet>

    <servlet-mapping>
        <servlet-name>LoginPage</servlet-name>
        <url-pattern>/</url-pattern>
    </servlet-mapping>

</web-app>```

[floral stratus]

Do you have anything else in the WEB-INF?

[whole lichen]

this is how it looks likes

[floral stratus]

What's the config.xml?

[whole lichen]

The spring configuration

[floral stratus]

<context-param>
        <param-name>contextConfigLocation</param-name>
        <param-value>/WEB-INF/config.xml</param-value>
    </context-param>

try adding that to the web.xml

[whole lichen]

https://sourceb.in/mmrrpBLKq9 i think the issue is still same

[floral stratus]

that's a different error

[whole lichen]

Ohh yehh

[floral stratus]

https://stackoverflow.com/q/60759399/10871900

Do you have hibernate-core in your pom.xml?

[whole lichen]

Yehh

[floral stratus]

Can you try changing the version of hibernate-core to 5.5.4?

[whole lichen]

here is the error https://sourceb.in/qRXdj4NzM8

i found

[floral stratus]

actually 5.6.7.Final is probably better

and 6.2.3.Final for Hibernate validator

see https://repo1.maven.org/maven2/org/springframework/boot/spring-boot-dependencies/2.6.6/spring-boot-dependencies-2.6.6.pom for versions that should match

[whole lichen]

the error

https://sourceb.in/q6MmhGqBfV

[floral stratus]

.

in your pom.xml

[whole lichen]

i did it

but still facing the error

[floral stratus]

Can you show it?

[whole lichen]

yeh sure

[floral stratus]

Did you reload the Maven project and restart tomcat after the change?

[whole lichen]

yeh

alt +f5 in eclipse

https://sourceb.in/sH4BqpnAM5

[floral stratus]

Do you have a build directory in the project?

or target

What's in WEB-INF/lib?

[whole lichen]

This is inside of the lib folder

this is what target folder have inside

[floral stratus]

You could try putting hibernate and other dependencies into WEB-INF/lib

if you don't know how to do that, you could also get Maven to do it

[whole lichen]

how to do it

?

[floral stratus]

I'm currently writing the configuration for it

            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-dependency-plugin</artifactId>
                <version>3.6.1</version>
                <configuration>
                    
                </configuration>
                <executions>
                    <execution>
                        <id>copy-libs</id>
                        <phase>generate-resources</phase>
                        <goals>
                            <goal>copy-dependencies</goal>
                        </goals>
                        <configuration>
                            <outputDirectory>${project.basedir}/src/main/webapp/WEB-INF/lib</outputDirectory>
                            <includeScope>compile</includeScope>
                            <includeGroupIds>org.hibernate</includeGroupIds>
                        </configuration>
                    </execution>
                </executions>
            </plugin>

You could try adding this to the pom.xml

this should attempt to copy the hibernate stuff to WEB-INF/lib

After doing that, it should look like this

[floral stratus]

Essentially that configures the dependency plugin (which manages dependencies) to automatically copy certain dependencies in the generate-resources phase. It is then configured to only do this for dependencies in org.hibernate with the scope compile (the default scope) and to copy it to WEB-INF/lib

[whole lichen]

So when i shift to spring boot from this then should i have to do it everytime

[floral stratus]

THis is normally not necessary with Spring Boot

Does it fix the error?

[whole lichen]

No 🙁

here is the error https://sourceb.in/sNkNTvjYmC

[floral stratus]

if you change <outputDirectory>${project.basedir}/src/main/webapp/WEB-INF/lib</outputDirectory> to <outputDirectory>${project.basedir}/src/main/resources/WEB-INF/lib</outputDirectory>, it doesn't change anything, right?

another thing yu could try is to right-click your project and select build path>configure build path. There, check Maven Dependencies under Order and Export

[whole lichen]

https://sourceb.in/evukY5GBoo The error i got after doing this !

[glad spear]

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[whole lichen]

Hey did u find why the error is coming @floral stratus

[floral stratus]

tbh idk

Actually what's your LoginPage?

Maybe the issue is with your config.xml

and maybe you could try that

In the build path, go to Add Library

select Web App Libraries

make sure the right project is selected

and click Finish

then it should look somewhat like that

[whole lichen]

Actually when did not connect the spring with orm then it was working fine but when I connected it with orm and try to get hibernate Template then it starts giving me errors

[floral stratus]

Do you really need HibernateTemplate?

I think HibernateTemplate doesn't even exist in newer Spring versions (you are using an old version of Spring)

[whole lichen]

So then how to work with orm in spring?

I think you are right bcz the video which I am following rn is 3 yrs old and in the comments people are also getting the same type of error as me

[floral stratus]

I think its's possible to directly use SessionFactory instead of HibernateTemplate

[floral stratus]

videos are a problem in general

[whole lichen]

Hmm yehh u are right

So now what should I have to remove from my config.xml

[floral stratus]

maybe everything related to HibernateTemplate?

But I think you have problems with SessionFactory, right?

[whole lichen]

Yehh

[floral stratus]

If you show me your current web.xml, config.xml and controller (as text, not with images or links to other sites), I may be able to reproduce it by myself

[whole lichen]

Alright give me 3 min

https://sourceb.in/WjYIRdSuLn here it is

[floral stratus]

What's com.controllers.Database.DaoEntity?

[whole lichen]

its database entity where i have made dao inteface and its implemented class and a Dao Entity

which i have creted using hibernate

[floral stratus]

ok so for me it works but I made some changes

since you now don't have the dispatcherservlet.xml in your web.xml, I added this to the config.xml:

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

also if yoou expand Web App Libraries>hibernate-core and select dialect, is there a MySQL55Dialect or MySQL8Dialect class there?

[whole lichen]

yehh it is here

[floral stratus]

Which one is there?

The thing is that I'm using a newer version of all of these things so a bit of it is different

but it does work for me

[whole lichen]

there are 2 of them 1st is MySQL8Dialect.class and the second one is MySQL55Dialect.class as well

[floral stratus]

ok I think MySQL8Dialect is better for you

so in your config.xml, also change <prop key="hibernate.dialect">org.hibernate.dialect.MySQL55Dialect</prop> to <prop key="hibernate.dialect">org.hibernate.dialect.MySQL8Dialect</prop>

and you also have this in the config.xml:

<bean id="hibernateTemplate" class="org.springframework.orm.hibernate5.HibernateTemplate">
        <property name="sessionFactory" ref="sessionFactory" />
    </bean>

comment this out

i.e. you can replace it with

<!--  <bean id="hibernateTemplate" class="org.springframework.orm.hibernate5.HibernateTemplate">
        <property name="sessionFactory" ref="sessionFactory" />
    </bean>-->
``` and it will no longer be active

and after you did all that, tell me what happens

[whole lichen]

so i have to change the dialect from 55 to 8 and comment this out right ?

[floral stratus]

yes

[floral stratus]

and don't forget about that

because you have the config.xml instead of the dispatcherservlet.xml now so you still need these parts

[whole lichen]

so u mean i have to add these lines to the config.xml aswell

?

@floral stratus

[floral stratus]

which lines?

[whole lichen]

      
          <property name="prefix" value="/WEB-INF/lib/view/"></property>
          <property name="suffix" value=".jsp"></property>
      
      </bean>```

[floral stratus]

yes

if you still want to use JSP, you probably need it

[whole lichen]

but i already have it in dispatcher-servlet.xml

[floral stratus]

Well you no longer use that in your web.xml, right?

[whole lichen]

ohh yeh i have passed the name of the config.xml file in the web.xml

so now i got another error bcz i have also comment out the hibernate template bean

https://sourceb.in/waPH7hhCtd

[whole lichen]

@floral stratus

[floral stratus]

How is that another error?

Also why do you use that sourcebin site instead of just posting these things in Discord using a codeblock?

[whole lichen]

The config file now

[floral stratus]

You still have this

    <bean id="hibernateTemplate" class="org.springframework.orm.hibernate5.HibernateTemplate">
    <property name="sessionFactory" ref="sessionFactory" />
</bean>

Try commenting this out as well

Also can you show the code you are using HibernateTemplate with? You likely need to change it

For me, it's possible to use Hibernate somewhat like that (using SessionFactory and not HibernateTemplate):

@Controller
public class Login {
    
    private final SessionFactory sessionFactory;
    
    public Login(SessionFactory sessionFactory) {
        this.sessionFactory = sessionFactory;
        
    }
    
    @RequestMapping("/hi")
    public String hi() {
        System.out.println("Hii");
        try(EntityManager em = sessionFactory.createEntityManager()){
            DaoEntity entity = new DaoEntity();
            entity.setId(123L);
            entity.setName("test");
            em.getTransaction().begin();
            em.persist(entity);
            em.getTransaction().commit();
        }
        return "hi";
    }
    
    @RequestMapping("/ho")
    public String ho() {
        System.out.println("Ho");
        try(EntityManager em = sessionFactory.createEntityManager()){
            System.out.println(em.find(DaoEntity.class, 123L).getName());
        }
        return "hi";
    }
}

btw please follow naming conventions in your code if possible: #1241797526374580325 message

[raven silo]

Naming conventions ensure that projects have similar names and allow to distinguish e.g. packages, classes and methods/variables. For that, it is important developers don't mix naming conventions.

Most Java code follows these naming conventions:

• Type names (e.g. classes or interfaces) should be PascalCase meaning the first letter of every word is written in uppercase while all other letters are lowercase.
• Constants are ALL_UPPERCASE_SEPARATED_BY_UNDERSCORES.
• Other variables (both fields and local variables) as well as methods are camelCase. This means the identifiers start with a lowercase letter, all subsequent words start with an uppercase letter and all other letters are lowercase.
• Package names are all_lowercase whereas dots are used to create a hierarchy of packages. All packages of an application are typically grouped together in some top level package. This typically uses reverse domain name notation. For example, an application called MyApplication maintained by a company/individual owning the domain example.com would put all its classes in a package named com.example.myapplication or subpackages.

package com.mydomain.myproject.somesubpackage;

public class ClassNamesArePascalCase{
  private static final String CONSTANTS_ARE_UPPER_CASE = "Hello World";
  private int variablesAreCamelCase = 13;

  public void methodNamesAreCamelCase(){
    int localVariablesAreAlsoCamelCase = 37;
  }
}

There are other naming conventions as well (for example prepending getters with get and setters with set, e.g. getMyVariable/setMyVariable.
Aside from that, projects may have specific naming conventions.

[whole lichen]

import javax.transaction.Transactional;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.orm.hibernate5.HibernateTemplate;
import org.springframework.stereotype.Repository;


@Repository
public class DaoEntityImp implements Dao {
    
    
    @Autowired
    private HibernateTemplate hibernateTemplate;
    
    @Transactional
    @Override
    public int saveUser(DaoEntity daoEntity) {
        
        return (int) this.hibernateTemplate.save(daoEntity);
    }

    @Override
    public DaoEntity getUser(int userId) {
        DaoEntity daoEntity  = this.hibernateTemplate.get(DaoEntity.class, userId);
        return daoEntity;
    }

    @Override
    public int deleteUser(int userId) {
        // TODO Auto-generated method stub
        return 0;
    }

    

    
    
    

}

here is the class where i am using the Hibernate Template

[floral stratus]

try it like this:

package com.controllers.Database;

import javax.transaction.Transactional;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.orm.hibernate5.HibernateTemplate;
import org.springframework.stereotype.Repository;


@Repository
public class DaoEntityImp implements Dao {
    
    
    private final EntityManager entityManager;//I CHANGED THIS
    
    public DaoEntityImp(SessionFactory sessionFactory) {//I ADDED THIS CONSTRUCTOR
         this.entityManager = sessionFactory.createEntityManager();    
    }
    
    @Override
    public int saveUser(DaoEntity daoEntity) {
        this.entityManager.getTransaction().begin();//these things are instead of @Transaction, there is a better way but this way should definitely work
        try{
            this.entityManager.persist(daoEntity);
            this.entityManager.getTransaction().commit();
            return 1;//no idea what you actually want to return here
        } catch(RuntimeException e) {
            this.entityManager.getTransaction().rollback();
            throw e;
        }
    }

    @Override
    public DaoEntity getUser(int userId) {
        DaoEntity daoEntity  = this.entityManager.get(DaoEntity.class, userId);
        return daoEntity;
    }

    @Override
    public int deleteUser(int userId) {
        // TODO Auto-generated method stub
        return 0;
    }
}

Alternatively you could replace the constructor with

    public Login(EntityManagerFactory emf) {
        this.entityManager = emf.createEntityManager();
    }

Alternatively if you want to use @Transactional, you could try this:

@Repository
public class DaoEntityImp implements Dao {
    
    
    private final SessionFactory sesionFactory;//I CHANGED THIS
    
    public DaoEntityImp(SessionFactory sessionFactory) {//I ADDED THIS CONSTRUCTOR
         this.sessionFactory = sessionFactory;    
    }
    
    @Transactional
    @Override
    public int saveUser(DaoEntity daoEntity) {
        this.sessionFactory.getCurrentSession().save(daoEntity);
        return 1;//idk what you want to return here
    }

    @Override
    public DaoEntity getUser(int userId) {
        DaoEntity daoEntity  = this.sessionFactory.getCurrentSession().get(DaoEntity.class, userId);
        return daoEntity;
    }

    @Override
    public int deleteUser(int userId) {
        // TODO Auto-generated method stub
        return 0;
    }
}

[whole lichen]

Ok I will try it later after reaching my home

But can you tell me please bro can I skip the spring MVC project bcz like I have completed the basics annotation and basic understanding of spring MVC so can I go for spring boot directly or stayed with it and make projects ?

[floral stratus]

yeah sure

[whole lichen]

Does it effect anything in my future ?

[floral stratus]

What specifically?

In most cases, Spring is used with Spring Boot

and tbh I've never used Spring without Spring Boot but as you have probably seen, I understand how it works enough so I can probably fix most problems (if I encounter a problem, I am more likely to properly understand it than when someone else encounters it because if it's on my machine, I can easily reproduce it and it's also something important for me so I'm willing to spend time on it)

So essentially I don't think you need to know how to use everything with Spring without Spring Boot but it's good to understand how these things work

[whole lichen]

So directly jumping into spring boot now will not be the bad decision for me .. And the main reason I am thinking to directly switch to spring boot is bcz i have completed spring core , spring MVC basics , spring with orm so I think this is enough to jump to spring boot right?

Does it important to learn spring JDBC Module as well ?

[floral stratus]

You can also use Spring JDBC with Spring Boot