Question

因此，假设我有一个名为Company的JSF托管bean。这个bean也是一个JPA实体类。它看起来像这样：

package com.microtekcomputers.models;

import java.io.Serializable;
import java.util.HashSet;
import java.util.Set;

import javax.faces.bean.ManagedBean;
import javax.faces.bean.ManagedProperty;
import javax.faces.bean.ViewScoped;
import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.GenerationType;
import javax.persistence.Id;
import javax.persistence.OneToMany;

import com.microtekcomputers.services.DaoCompany;

@Entity
@ManagedBean
@ViewScoped
public class Company implements Serializable{

    @Id
    @GeneratedValue(strategy=GenerationType.AUTO)
    private int company_id;

    @ManagedProperty("#{companyService}")
    private DaoCompany daoCompany;

    @Column
    private String name;

    private String address1;

    private String address2;

    private String city;

    private String state;

    private String zipcode;

    private String contact;

    private String tel1;

    private String tel2;

    private String fax;

    private String comments;

    //collection of networks, ISPs, software, hardware
    @OneToMany(mappedBy="company")
    private Set<Network> networks = new HashSet<Network>();

    @OneToMany(mappedBy="company")
    private Set<ISP> isps = new HashSet<ISP>();

    @OneToMany(mappedBy="company")
    private Set<Software> softwares = new HashSet<Software>();

    @OneToMany(mappedBy="company")
    private Set<Hardware> hardwares = new HashSet<Hardware>();

    /* I deleted the other getters and setters (but they go here) */

    //I NEED THE SETTER FOR MY MANAGED PROPERTY
    public void setDaoCompany(DaoCompany daoCompany) {
        this.daoCompany = daoCompany;
    }


    //dao methods
    public void insertCompany()
    {
        daoCompany = new DaoCompany();

        daoCompany.insertCompany(this);
    }
}

这个想法是为用户提供一个表单来写公司数据（名称，地址，城市等），在提交按钮上，我会调用 insertCompany（）。我的DaoCompany类有一个ManagedProperty。这是代码：

package com.microtekcomputers.services;

import javax.faces.bean.ApplicationScoped;
import javax.faces.bean.ManagedBean;

import org.hibernate.Session;
import org.hibernate.SessionFactory;
import org.hibernate.Transaction;

import com.microtekcomputers.models.Company;

@ManagedBean(name="companyService")
@ApplicationScoped
public class DaoCompany {

    //I created a singleton class for my Session Factory
    private SessionFactory sf = SingletonSessionFactory.getSessionFactory();

    private Session session = sf.openSession();

    public void insertCompany(Company company)
    {
        Transaction t = session.beginTransaction();

        session.save(company);

        t.commit();

        session.flush();

        session.close();        

    }

    public void updateCompany(Company company)
    {
        Transaction t = session.beginTransaction();

        session.update(company);

        t.commit();

        session.flush();

        session.close();
    }
}

我的问题是，在同一个类上同时使用JSF托管bean和JPA实体是否是一种好习惯。如果没有，那可能是我的另类选择？因为我不能在我的bean类上使用 insertCompany（）来访问xhtml吗？

使用与JPA实体和JSF托管bean相同的类

0 个答案: