Valen Won

wangwj/scttsc
valenwon/cnoug
22/Mar/08
Oracle10r2/jboss4.22
这回，我来实现一个更复杂的entity bean ，首先创建一个新表：
create table EMPLOYEE
(
EMPLOYEEID NUMBER(19) not null,
ADDRESS   VARCHAR2(255 CHAR),
NAME     VARCHAR2(255 CHAR),
STATUS   NUMBER(19),
REMARK   CLOB,
BIRTHDAY   DATE,
PHONE     VARCHAR2(255 CHAR),
CELLPHONE VARCHAR2(255 CHAR),
STATUSDATE TIMESTAMP(6)
)



里面基本包含常用字段，其中还包括CLOB以及TIMESTAMP。我将映射这个employee表，并实现基本的UIDQ。

EJB3相比EJB2.1在这方面做了很多改进，在实验过程中，我们会发现什么配置文件、部署文件通通都可以用简洁的annotation代替。我以前的项目中，我不喜欢用EJB2.1的entity bean，而用hibernate，最多也部署一些Message driven bean和Session bean，现在又多了一种官方选择。
由于本例的环境和bean和第一例及其相似，所以不在详细记录（提供完整代码下载）
创建bean
package com.scttsc.domain;



import java.sql.Timestamp;

import java.util.Date;



import javax.persistence.Basic;

import javax.persistence.Column;

import javax.persistence.Entity;

import javax.persistence.FetchType;

import javax.persistence.GeneratedValue;

import javax.persistence.Id;

import javax.persistence.Lob;

import javax.persistence.SequenceGenerator;

import javax.persistence.GenerationType;

import javax.persistence.Table;

import javax.persistence.Temporal;

import javax.persistence.TemporalType;





@Entity

@Table(name = "EMPLOYEE")

@SequenceGenerator(name = "SEQ_EMPLOYEE", sequenceName = "SEQ_EMPLOYEE")

public class Employee implements java.io.Serializable {

    private static final long serialVersionUID = 1L;



    private long employeeid;

    private String name;

    private Date birthday;

    private String address;

    private String phone;

    private String cellphohe;

    private long status;

    private Date statusdate;

    private String remark;

    @Id

    @Column(name = "EMPLOYEEID")

    @GeneratedValue(strategy = GenerationType.SEQUENCE, generator = "SEQ_EMPLOYEE")

    public long getEmployeeid() {

        return this.employeeid;

    }

    public void setEmployeeid(long employeeid) {

        this.employeeid = employeeid;

    }

    @Column(name = "NAME")

    @Basic(optional = true)

    public String getName() {

        return this.name;

    }

    public void setName(String name) {

        this.name = name;

    }



    @Column(name = "BIRTHDAY")

    @Temporal(TemporalType.DATE)

    public Date getBirthday() {

        return this.birthday;

    }

    public void setBirthday(Date Birthday) {

        this.birthday = Birthday;

    }

    @Column(name = "ADDRESS")

    public String getAddress() {

        return this.address;

    }

    public void setAddress(String address) {

        this.address = address;

    }

    @Column(name = "PHONE")

    public String getPhone() {

        return this.phone;

    }

    public void setPhone(String phone) {

        this.phone = phone;

    }

    @Column(name = "CELLPHONE")

    public String getCellphohe() {

        return this.cellphohe;

    }

    public void setCellphohe(String cellphone) {

        this.cellphohe = cellphone;

    }

    @Column(name = "STATUS")

    @Basic(optional = true)

    public long getStatus() {

        return this.status;

    }



    public void setStatus(long status) {

        this.status = status;

    }

    @Column(name = "STATUSDATE")

    @Temporal(TemporalType.TIMESTAMP)

    public Date getStatusdate() {

        return this.statusdate;

    }

    public void setStatusdate(Date statusdate) {

        this.statusdate = statusdate;

    }

    @Lob

    @Column(name = "REMARK")

    @Basic(fetch = FetchType.LAZY)

    public String getRemark() {

        return this.remark;

    }

    public void setRemark(String remark) {

        this.remark = remark;

    }

}

下面依次解释用到的annotation