EJB OneToOne 实体BEAN sessionBean 客户端演示

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hongmin118 2023-02-19 10:30:33 ©著作权

文章标签 bean ejb integer constructor string 文章分类 Python 后端开发

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customer 和 address 表映射实体BEAN

两张实体都是OneToOne

customer

package ch03.com.ma.entity;

import javax.persistence.CascadeType;
import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.FetchType;
import javax.persistence.Id;
import javax.persistence.JoinColumn;
import javax.persistence.ManyToOne;
import javax.persistence.OneToOne;
import javax.persistence.Table;

/**
 * Customer generated by MyEclipse Persistence Tools
 */
@Entity
@Table(name = "customer", catalog = "test", uniqueConstraints = {})
public class Customer implements java.io.Serializable {

  // Fields

  /**
   * 
   */
  private static final long serialVersionUID = 4432424287798285970L;

  private Integer id;

  private Address address;

  private String name;

  private String shortName;

  private Double registeredCapital;

  private String portrait;

  // Constructors

  /** default constructor */
  public Customer() {
  }

  /** minimal constructor */
  public Customer(Integer id) {
    this.id = id;
  }

  /** full constructor */
  public Customer(Integer id, Address address, String name, String shortName,
      Double registeredCapital, String portrait) {
    this.id = id;
    this.address = address;
    this.name = name;
    this.shortName = shortName;
    this.registeredCapital = registeredCapital;
    this.portrait = portrait;
  }

  // Property accessors
  @Id
  @Column(name = "id", unique = true, nullable = false, insertable = true, updatable = true)
  public Integer getId() {
    return this.id;
  }

  public void setId(Integer id) {
    this.id = id;
  }

  @OneToOne(cascade = {CascadeType.ALL}, fetch = FetchType.EAGER)
  @JoinColumn(name = "addressid", unique = false, nullable = true, insertable = true, updatable = true)
  public Address getAddress() {
    return this.address;
  }

  public void setAddress(Address address) {
    this.address = address;
  }

  @Column(name = "name", unique = false, nullable = true, insertable = true, updatable = true)
  public String getName() {
    return this.name;
  }

  public void setName(String name) {
    this.name = name;
  }

  @Column(name = "shortName", unique = false, nullable = true, insertable = true, updatable = true)
  public String getShortName() {
    return this.shortName;
  }

  public void setShortName(String shortName) {
    this.shortName = shortName;
  }

  @Column(name = "registeredCapital", unique = false, nullable = true, insertable = true, updatable = true, precision = 10, scale = 0)
  public Double getRegisteredCapital() {
    return this.registeredCapital;
  }

  public void setRegisteredCapital(Double registeredCapital) {
    this.registeredCapital = registeredCapital;
  }

  @Column(name = "portrait", unique = false, nullable = true, insertable = true, updatable = true)
  public String getPortrait() {
    return this.portrait;
  }

  public void setPortrait(String portrait) {
    this.portrait = portrait;
  }

}

address

package ch03.com.ma.entity;

import java.util.HashSet;
import java.util.Set;
import javax.persistence.CascadeType;
import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.FetchType;
import javax.persistence.Id;
import javax.persistence.OneToMany;
import javax.persistence.OneToOne;
import javax.persistence.Table;

/**
 * Address generated by MyEclipse Persistence Tools
 */
@Entity
@Table(name = "address", catalog = "test", uniqueConstraints = {})
public class Address implements java.io.Serializable {

  // Fields

  /**
   * 
   */
  private static final long serialVersionUID = 3559085342537686006L;

  private Integer id;

  private String addressName;

  private Customer customer ;

  // Constructors

  /** default constructor */
  public Address() {
  }

  /** minimal constructor */
  public Address(Integer id) {
    this.id = id;
  }

  /** full constructor */
  public Address(Integer id, String addressName, Customer customer) {
    this.id = id;
    this.addressName = addressName;
    this.customer = customer;
  }

  // Property accessors
  @Id
  @Column(name = "id", unique = true, nullable = false, insertable = true, updatable = true)
  public Integer getId() {
    return this.id;
  }

  public void setId(Integer id) {
    this.id = id;
  }

  @Column(name = "addressName", unique = false, nullable = true, insertable = true, updatable = true)
  public String getAddressName() {
    return this.addressName;
  }

  public void setAddressName(String addressName) {
    this.addressName = addressName;
  }

  @OneToOne(cascade = { CascadeType.ALL }, fetch = FetchType.EAGER, mappedBy = "address")
  public Customer getCustomer() {
    return this.customer;
  }

  public void setCustomer(Customer customer) {
    this.customer = customer;
  }

}

customer的sessionBean

package ch03.com.ma.bo.impl;

import java.util.List;

import javax.ejb.Stateless;
import javax.persistence.EntityManager;
import javax.persistence.PersistenceContext;
import javax.persistence.Query;


import ch03.com.ma.bo.ICustomerService;
import ch03.com.ma.entity.Address;
import ch03.com.ma.entity.Customer;


@Stateless
public class CustomerService extends BaseService implements ICustomerService {

  //@PersistenceContext(unitName = "hongmin.ma")
  //private EntityManager entityManager;
  
  public void delete(int id) {
    Customer cusEO = this.findById(id);
    entityManager.remove(cusEO);
  }

  @SuppressWarnings("unchecked")
  public List<Customer> findAll(){
    try{
      String sql = " select c from Customer c";
      Query query=entityManager.createQuery(sql);
      List<Customer> list=query.getResultList();
    return list;
    }catch(Exception ex){
      ex.printStackTrace();
      return null;
    }
  }

  public Customer findById(int id) {
    Customer cusEO = entityManager.find(Customer.class, id);
    return cusEO;
  }

  public void save(Customer cusEO,Address address) {
    //entityManager.persist(address);
    cusEO.setAddress(address);
    entityManager.persist(cusEO);
  }

  public Customer update(Customer cusEO) {
    Customer result = entityManager.merge(cusEO);
    return result;
  }

}

客户端

package action;

import java.util.Properties;

import javax.naming.InitialContext;


import ch03.com.ma.bo.ICustomerService;
import ch03.com.ma.common.EjbConnection;
import ch03.com.ma.entity.Address;
import ch03.com.ma.entity.Customer;


public class Test1 {
  private static InitialContext ctx=null;
  
  public static void main(String[] args) {

    
    try {
      ctx = EjbConnection.getConnection();
    
      ICustomerService remote=(ICustomerService) ctx.lookup("CustomerService/remote");
//      客户
//      添加客户，同时添加地址
      Address addEO=new Address();
      addEO.setId(2);
      addEO.setAddressName("江苏苏州");
      
      Customer cusEO=new Customer();
      cusEO.setId(2);
      cusEO.setName("bbb");
      cusEO.setShortName("b");
      cusEO.setRegisteredCapital(10000d);
      
      remote.save(cusEO,addEO);
      System.out.println("添加成功");
      
    } catch (Exception e) {
      e.printStackTrace();
    }
    
    
  }
  
  
}

EJBConnection:

package ch03.com.ma.common;

import java.io.IOException;
import java.util.Properties;

import javax.naming.InitialContext;
import javax.naming.NamingException;

public class EjbConnection {
  private static InitialContext ctx=null;
  private static void init(){
    Properties props=new Properties();
    try {
      props.load(EjbConnection.class.getResourceAsStream("../../../../config/EJB.properties"));
      ctx=new InitialContext(props);
    } catch (IOException e) {
      e.printStackTrace();
    } catch (NamingException e) {
      e.printStackTrace();
    }
  }
  
  public static synchronized InitialContext getConnection() {
    if(ctx==null){
      init();
    }
    return ctx;
  }
  
  
  public static void destroyConnection(){
    if(ctx!=null){
      try {
        ctx.close();
        ctx=null;
      } catch (NamingException e) {
        e.printStackTrace();
      }
      
    }
  }
}