[转载]org.hibernate.ObjectDeletedException: deleted object would be re-saved

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org.hibernate.ObjectDeletedException: deleted object would be re-saved by cascade (remove deleted object from associations)异常的解决

在Hibernate中，删除存在关联关系的一个对象时，会出现 org.hibernate.ObjectDeletedException: deleted object would be re-saved by cascade (remove deleted object from associations)这个异常

如下：
持久化类：

package?org.lizheng.platform.model;

import?java.util.HashSet;
import?java.util.Set;

import?org.apache.commons.lang.builder.EqualsBuilder;
import?org.apache.commons.lang.builder.HashCodeBuilder;
import?org.apache.commons.lang.builder.ToStringBuilder;

/**
?*?产品类别对象
?*?@author?crazycy
?*
?*/
public?class?ProductCategory?extends?BaseObject?{

????//?Fields????

????private?long?id;

????private?String?name;

????private?String?description;

????private?ProductCategory?parentCategory;

????private?Set?childrenCategories?=?new?HashSet();

????//?Constructors

????/**?default?constructor?*/
????public?ProductCategory()?{
????}

????/**?minimal?constructor?*/
????public?ProductCategory(String?name)?{
????????this.name?=?name;
????}
????
????public?ProductCategory(String?name,?String?description)?{
????????this.name?=?name;
????????this.description?=?description;
????}

????/**?full?constructor?*/
????public?ProductCategory(String?name,?String?description,
????????????ProductCategory?parentCategory)?{
????????this.name?=?name;
????????this.description?=?description;
????????this.parentCategory?=?parentCategory;
????}

????/**?full?constructor?*/
????public?ProductCategory(String?name,?String?description,
????????????Set?childrenCategories)?{
????????this.name?=?name;
????????this.description?=?description;
????????this.childrenCategories?=?childrenCategories;
????}

????//?Property?accessors

????public?long?getId()?{
????????return?this.id;
????}

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

????public?String?getName()?{
????????return?this.name;
????}

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

????public?String?getDescription()?{
????????return?this.description;
????}

????public?void?setDescription(String?description)?{
????????this.description?=?description;
????}

????public?ProductCategory?getParentCategory()?{
????????return?this.parentCategory;
????}

????public?void?setParentCategory(ProductCategory?parentCategory)?{
????????this.parentCategory?=?parentCategory;
????}
????
????/**
?????*?由主来调：是主添加
?????*?@param?productCategory
?????*/
????public?void?addCategory(ProductCategory?productCategory)?{
????????productCategory.setParentCategory(this);
????????childrenCategories.add(productCategory);
????}
????
????/**
?????*?由主来调；是从主删除
?????*?@param?productCategory
?????*/
????public?void?removeCategory(ProductCategory?productCategory)?{
????????childrenCategories.remove(productCategory);
????????productCategory.setParentCategory(null);
????}
????
????public?Set?getChildrenCategories()?{
????????return?childrenCategories;
????}

????public?void?setChildrenCategories(Set?childrenCategories)?{
????????this.childrenCategories?=?childrenCategories;
????}

????/**
?????*?@see?java.lang.Object#equals(Object)
?????*/
????public?boolean?equals(Object?object)?{
????????if?(!(object?instanceof?ProductCategory))?{
????????????return?false;
????????}
????????ProductCategory?rhs?=?(ProductCategory)?object;
????????return?new?EqualsBuilder().append(this.description,?rhs.description)
????????????????.append(this.name,?rhs.name).append(this.id,?rhs.id).isEquals();
????}

????/**
?????*?@see?java.lang.Object#hashCode()
?????*/
????public?int?hashCode()?{
????????return?new?HashCodeBuilder(1009592109,?-669108101).append(
????????????????this.description).append(this.name).append(this.id)
????????????????.toHashCode();
????}

????/**
?????*?@see?java.lang.Object#toString()
?????*/
????public?String?toString()?{
????????return?new?ToStringBuilder(this).append("name",?this.name).append(
????????????????"description",?this.description).append("id",?this.id)
????????????????.toString();
????}

}

映射文件

测试代码：

仔细分析原因，最容易出现的三点问题是：