Spring Hibernate Annotations

In this section, you will learn about the common annotations used for Spring Hibernate Integration.


 

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Spring Hibernate Annotations

In this section, you will learn about the common annotations used for Spring Hibernate Integration.

Hibernate Annotation

Annotation used for Hibernate entity class mapping is given below :

package net.roseindia.model;

import java.util.Date;

import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.Id;
import javax.persistence.Table;

@Entity
@Table(name = "article")
public class Article {

@Id
@GeneratedValue
@Column(name = "article_id")
private Long articleId;

@Column(name = "article_name", nullable = false, length=20)
private String articleName;

@Column(name = "article_desc", nullable = false)
private String articleDesc;

@Column(name = "date_added")
private Date addedDate;

public Article() { 
}

public Long getArticleId() {
return articleId;
}

public void setArticleId(Long articleId) {
this.articleId = articleId;
}

public String getArticleName() {
return articleName;
}

public void setArticleName(String articleName) {
this.articleName = articleName;
}

public String getArticleDesc() {
return articleDesc;
}

public void setArticleDesc(String articleDesc) {
this.articleDesc = articleDesc;
}

public Date getAddedDate() {
return addedDate;
}

public void setAddedDate(Date addedDate) {
this.addedDate = addedDate;
} 
}

Spring Annotation

The annotation used in the controller class is given below :

package net.roseindia.controller;

import java.util.HashMap;
import java.util.Map;

import net.roseindia.model.Article;
import net.roseindia.service.ArticleService;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.validation.BindingResult;
import org.springframework.web.bind.annotation.ModelAttribute;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.servlet.ModelAndView;

@Controller
@RequestMapping("/articles")
public class ArticleController {

@Autowired
private ArticleService articleService;

@RequestMapping(value = "/save", method = RequestMethod.POST)
public ModelAndView saveArticle(@ModelAttribute(" article") Article article,
BindingResult result) {
articleService.addArticle( article);
return new ModelAndView("redirect:/articles.html");
}

@RequestMapping(method = RequestMethod.GET)
public ModelAndView listArticles() {
Map<String, Object> model = new HashMap<String, Object>();
model.put("articles", articleService.listArticles());

return new ModelAndView("articlesList", model);
}

@RequestMapping(value = "/add", method = RequestMethod.GET)
public ModelAndView addArticle(@ModelAttribute("article") Article article,
BindingResult result) {
return new ModelAndView("addArticle");
}

}

In the above example, ArticleDao is the Dao layer Interface and its implementation class is given below:

package net.roseindia.dao;

import java.util.Date;
import java.util.List;

import net.roseindia.model.Article;

import org.hibernate.SessionFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Repository;

@Repository("articleDao")
public class ArticleDaoImpl implements ArticleDao {

@Autowired
private SessionFactory sessionFactory;

// To Save the article detail
public void saveArticle(Article article) {
article.setAddedDate(new Date());
sessionFactory.getCurrentSession().saveOrUpdate(article);
}

// To get list of all articles
@SuppressWarnings("unchecked")
public List<Article> listArticles() { 
return (List<Article>) sessionFactory.getCurrentSession().createCriteria(Article.class).list();
}
}

In the above example, ArticleService is the service layer interface and its implementation class is given below :

package net.roseindia.service;

import java.util.List;

import net.roseindia.dao.ArticleDao;
import net.roseindia.model.Article;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Propagation;
import org.springframework.transaction.annotation.Transactional;

@Service("articleService")
@Transactional(propagation = Propagation.SUPPORTS, readOnly = true)
public class ArticleServiceImpl implements ArticleService {

@Autowired
private ArticleDao articleDao;

public ArticleServiceImpl() {
}

@Transactional(propagation = Propagation.REQUIRED, readOnly = false)
public void addArticle(Article article) {
articleDao.saveArticle(article);
}

public List<Article> listArticles() {
return articleDao.listArticles();
}

}

For complete example, click here.

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Spring Hibernate Annotations

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Comments:1
Rupali Thorat
March 4, 2013
Spring

what is the use of Annotation in program

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