hibernate标识符问题

转http://lz726.iteye.com/blog/116616

有关lazy的异常分析

对象表识符：

       Hibernate 的 pojo 对象

 

import org.apache.commons.lang.builder.EqualsBuilder;

import org.apache.commons.lang.builder.HashCodeBuilder;

import org.apache.commons.lang.builder.ToStringBuilder;

public class Department extends BaseObject implements java.io.Serializable {

 

    private Integer id ;

 

    private String depNo ;

 

    private String depName ;

    /** default constructor */

    public Department() {

    }

 

//getter/setter

 

 

    public int hashCode() {

       return new HashCodeBuilder().append(getId()).toHashCode(); 

    }

 

    public String toString() {

return new ToStringBuilder( this ).append( "id" , getId()).toString(); 

    }

   

    public boolean equals(Object other) { 

   

      if ( ( this == other)) return true ; 

      if (! (other instanceof Department)) return false ; 

      Department otherDep = (Department) other; 

return new EqualsBuilder().append( this .getId(), otherDep.getId()).isEquals(); 

   

}

public abstract class BaseObject implements Serializable {
   
    public abstract String toString();
    public abstract boolean equals(Object o);
    public abstract int hashCode();


}

用业务键值比较对象是否相等 使用 org.apache.commons.lang.包中的方法重写equals和hashcode方法

评论

1 楼 fastzch 2008-07-28  

不知所云。