I am using Spring Tool Suite (STS). I am confused is there any way to autogenerate POJO based on table in postgres sql along with mapping.
I know how to generate POJO from database table in Advanced Java project on eclipse but I tried for spring project in STS with no positive result.
In advanced Java project I simply use this link http://www.eclipse.org/webtools/dali/docs/3.2/user_guide/tasks006.htm
It would be helpful if anyone share their thoughts.
Related
I’m trying to build an administration portal accessible via web starting from the informations inside a database using Spring Boot with MyBatis for accessing the database. I wanted to find a way to reuse the code that I’m building for the portal with any other type of database, so I was wondering if there was a way to automatically generate classes for my project starting from the informations in the database, for example table names and fields...
Thanks in advance!
Telosys code generator (http://www.telosys.org) does this kind of job.
It uses the database schema to create a lightweight model that is used to generate the code (Java or any other language).
For more information see : https://modeling-languages.com/telosys-tools-the-concept-of-lightweight-model-for-code-generation/
Everything is Open Source (tool and templates)
An option could be Jassd, which generates POJOs, Dao interfaces, and Dao implementation classes from a database. Use what you want from the output and discard the rest, the aim of this project was to not have to manually write getters and setters and have something to start from.
See the documentation and sample output at https://github.com/aforslund/jassd
(Note: I am the author, implemented this library to be able to get plain old Java objects generated and bootstrap som Dao/DaoImplementation classes using plain SQL and JDBCTemplate with Spring Boot).
If it is to switch db and reuse the code, simply changing these values in application.properties should help. If you have MySQL in development environment and postgres in production, that can also be handled. Check the following link for more details
https://docs.spring.io/spring-boot/docs/current/reference/html/boot-features-sql.html
You are lucky! I just release cgV19 at https://github.com/carstenSpraener/cgV19
With it you could implement a model loader which connects to your database and reads the table information. It than provides this information to cgV19 as a meta model.
the next step is to implement a "cartridge" for cgV19 where you can generate java classes from that meta model.
if you try it out please give me feedback on you progress.
If you are going to use mybatis then MyBatis Generator is your best bet:
MyBatis Generator (MBG) is a code generator for MyBatis MyBatis and iBATIS. It will generate code for all versions of MyBatis, and versions of iBATIS after version 2.2.0. It will introspect a database table (or many tables) and will generate artifacts that can be used to access the table(s).
MyBatis Generator will generate:
Java POJOs that match the table structure.
MyBatis/iBATIS Compatible SQL Map XML Files. MBG generates SQL for simple CRUD functions on each table in a configuration.
Java client classes that make appropriate use of the above objects.
I've restricted access to the eclipse market place and a network with terrible connectivity issues , therefore i wont be able to download Jboss tools which is like more than 300MB .
Is there a way to generate jpa/hibernate model classes from database without using JBoss hibernate tools ?
yes, it is possible to generate hibernate/jpa specific model classes from you database using hibernate maven plugin. Only thing is your project should be maven project.
Please refer below links:
In the below link plz check the first answer provided by John citizen.
[https://developer.jboss.org/message/801478?_sscc=t#801478][1]
below link for any trouble shooting.
How to configure maven hbm2hbmxml and hbm2java to run one after the other in mvn clean install
I trying to make a project using the Spring Initializr wizard and I already have a database, so I want to generate entities classes using Spring Boot and IntelliJ Idea.
Prerequisites are:
You have your Spring Boot project initialized correctly in IDEA
JPA persistence.xml file or similar has been generated correctly
Then you have to do these things:
Create a DataSource - here you will add a simple DataSource that will connect to your database. The setup should be intuitive - you only provide connection details and add DB drivers (IDEA can download them for you)
Add JPA/Hibernate facet. You can do it like this or this.
Now you should be able to generate entities using IDEA. What you want to do here is choose Generate by Database Schema. The dialog will let you select the tables you want to use, the rest should be up to you.
Im a bit confused about this :
I've setuped a simple maven-archetype-webapp
So far i've been creating entities from a plain POJO, adding annotations as needed
But lately i think that there could be ways to ease this entity creations, so i googled
And found out about eclipse that could help me generate the JPA entities ..
I tried right clicking on my package that contains the entities, and new -> JPA -> Entity, only to find out that i can only make use of this in a JPA project.
In one hand, i have a maven project (which is not a JPA project created by eclipse), and in the other hand, i'd like to give eclipse JPA a try.
And one more thing, i have something in mind that we could design with a GUI tool, creating entities, defining the relations, defining configurations like the id generation sequence, multiple unique columns, compound key, etc and have the JPA entities generated for you.
Does this kind of tool exist ? Perhaps as an eclipse plugin or something else ?
JPA tooling can be added to an existing Eclipse project in a couple of ways, depending on the type of project you are starting with. If you have a Java project, you can right-click on it and use the "Configure" -> "Convert to JPA project..." menu item to add JPA project capabilities to an existing Java project. If you have a Web project or other WTP based project (known as "faceted" projects), you can simply add the JPA facet to the project in the project properties on the "Facets" node. If you are starting from scratch you can create a JPA project, which is basically just a Java project with JPA tooling added in.
I'm not sure if you are using m2e, but this is the Eclipse Maven integration tooling. There are some known issues using Maven with the JPA tooling in Eclipse, but there are workarounds that may work for you.
As for graphical diagramming tools for developing entities, this is coming to the Eclipse Dali Java Persistence Tools project for the next release - 3.0 (Indigo). You can try this functionality out now by downloading the JPA Diagram Editor. Check out the youtube video (search JPA Diagram Editor) for a quick demo of the functionality.
Sorry for the lack of links, but I can only post 1 per reply as a new user.
I'm learning hibernate and I am running into some issues. I'm reading "Harnessing Hibernate" by O'Reilly. They explain everything using ANT, but since I want to avoid writing a huge build.xml file, I'm trying to get it to work with IntelliJ.
I managed to make a mapping according to a DB table in a MySQL database, and wrote the bean for it. It worked, but I can't find any information on how to generate beans and SQL code, or how to reverse engineer with IntelliJ. I found loads of tutorials about Eclipse, using JBOSS Hibernate tools plugin, and the site claims this support for generating code is already in the standard installation of IntelliJ.
Am I forgetting some configuration such as adding libraries? I'm trying to find this out but I'm desperate now. Please don't suggest me to use Eclipse, I need IntelliJ for my current role.
AFAIK, IntelliJ IDEA includes the complete JPA/Hibernate support in its Ultimate Edition:
Generating Persistence Mappings from Database Schema
IntelliJ IDEA allows you to quickly
generate persistence mappings from any
database schema: Generating
Persistance Mappings
(source: jetbrains.com)
Now, the question is, what edition of Intellij IDEA are you using?
If you add the hbm2ddl to your Hibernate config and ask it to create the database schema you'll get it by running a single test or some other code that exercises Hibernate. Once you have it, turn off create.
Let Hibernate do the work.