hibernate-DetachedCriteria实现关联表条件复查

CREATE TABLE `ent_lable` (
`idStr` char(32) NOT NULL,
`pk_1` char(6) NOT NULL,
`pk_2` char(32) NOT NULL,
PRIMARY KEY (`idStr`)
) ENGINE=MyISAM DEFAULT CHARSET=utf8;

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

import org.hibernate.annotations.GenericGenerator;

@Entity
@Table(name="ent_lable")
public class EntLable  extends BaseModel{

private static final long serialVersionUID = 1L;
@Id
@GeneratedValue(generator="paymentableGenerator")
@GenericGenerator(name="paymentableGenerator",strategy="uuid")
@Column(name="idStr")
private String idStr;
@Column(name="pk_1")
private String pk_1;
@Column(name="pk_2")
private String pk_2;
public void setIdStr(String idStr){
this.idStr=idStr;
}
public String getIdStr(){
return idStr;
}
public String getPk_1() {
return pk_1;
}
public void setPk_1(String pk_1) {
this.pk_1 = pk_1;
}
public String getPk_2() {
return pk_2;
}
public void setPk_2(String pk_2) {
this.pk_2 = pk_2;
}

}

DetachedCriteria dc = DetachedCriteria.forClass(EntLable.class);
if(StringUtils.isBlank(pk_1)) return null;
dc.add(Restrictions.eq("pk_1", pk_1));
dc.setProjection(Projections.property("pk_2"));
DetachedCriteria dc1 = DetachedCriteria.forClass(EntLable.class);
dc1.add(Property.forName("pk_2").eq(dc));

import org.springframework.util.StringUtils;

public abstract class BaseModel extends BaseObject implements Modelable {

private static final long serialVersionUID = 1L;

public int hashCode() {
String idStr = getIdStr();
return StringUtils.isEmpty(idStr)?super.hashCode():idStr.hashCode();
}

public boolean equals(Object other) {
if (other == null) {
return false;
}
if (other == this) {
return true;
}
/*因为字节码增强的关系，getClass()不能用作判断的依据*/
if (getClass().getPackage() != other.getClass().getPackage()) {
return false;
}
if (hashCode() == other.hashCode()) {
return true;
}
return false;
}
}

import java.io.Serializable;

import org.apache.commons.lang.builder.ToStringBuilder;
import org.apache.commons.lang.builder.ToStringStyle;
import org.apache.log4j.Logger;

public class BaseObject implements Cloneable, Serializable {
private static final long serialVersionUID = 1L;
/**日志对象*/
protected final Logger log = Logger.getLogger(getClass());
/**覆盖toString方法，ToStringStyle取值为ToStringStyle.SHORT_PREFIX_STYLE
* ，调试的时候注意会自动取所有引用的值，会触发所有的延迟加载
* @return String
* @see org.apache.commons.lang.builder.ToStringBuilder#reflectionToString(Object, ToStringStyle)
*/
public String toString() {
return ToStringBuilder.reflectionToString(this, ToStringStyle.SHORT_PREFIX_STYLE);
}
/**
* 提供默认的clone方法的实现，不支持深层复制
* @return Object
*/
public Object clone() {
try {
return super.clone();
} catch (CloneNotSupportedException ex) {
throw new IllegalArgumentException(ex.getMessage());
}
}
}

import java.io.Serializable;

public interface Modelable extends JSONNotAware,Serializable, Cloneable {
String getIdStr();
void setIdStr(String idStr);
}

/**
* 实现此接口的对象，都不会被ModelUtils中的model2JSON和modelList2JSONArray转换方法序列化
*/
public interface JSONNotAware {

}