Hibernate 配置1对多,插入等问题的demo

[Jacky_Zhu_1983]

最近老是看到有人问Hibernate 1对多,多对1配置,插入,删除等问题.
我就动手做了个小的事例,希望对大家有用!
----BlogUser 表

public class BlogUser implements java.io.Serializable {

	private static final long serialVersionUID = 8850445505288137285L;

	private Integer userId;

	private String userName;

	private String passWordOne;

	private Set<BlogFile> blogFile = new HashSet<BlogFile>();
//省略set & get ....
}

----BlogFile 表

public class BlogFile implements java.io.Serializable {

	private static final long serialVersionUID = -1963389377781856294L;

	private Integer fileId;

	private String filePath;

	private String fileName;
	
	private BlogUser blogUser;    //private String createUserId;
//省略set & get ....
}

---BlogUser.hbm.xml

<hibernate-mapping>
    <class name="model.user.BlogUser" table="BLOG_User" schema="dbo" catalog="Blog"
    		dynamic-update="true"  optimistic-lock="version" >
        <id name="userId" type="java.lang.Integer">
            <column name="userId" />
            <generator class="native" />
        </id>
        <property name="userName" type="java.lang.String">
            <column name="userName" length="50"  />
        </property>
        <property name="passWordOne" type="java.lang.String">
            <column name="passWordOne" length="50"  />
        </property>
        <set name="blogFile" inverse="true" lazy="true" cascade="all-delete-orphan">
            <key>
                <column name="userId" />
            </key>
            <one-to-many class="model.user.BlogFile"/>
        </set>
    </class>
</hibernate-mapping>

---BlogFile.hbm.xml

<hibernate-mapping>
    <class name="model.user.BlogFile" table="Blog_File" schema="dbo" catalog="Blog">
        <id name="fileId" type="java.lang.Integer">
            <column name="fileId" />
            <generator class="native" />
        </id>
        <property name="filePath" type="java.lang.String">
            <column name="filePath" length="200" />
        </property>
        <property name="fileName" type="java.lang.String">
            <column name="fileName" length="200" />
        </property>
        <many-to-one name="blogUser"
			class="model.user.BlogUser">
			<column name="createUserId" /> <!--createUserId 是blogUser的主键userId -->
		</many-to-one>
    </class>
</hibernate-mapping>

---action

public ActionForward insertUser(ActionMapping mapping, ActionForm form,
			HttpServletRequest request, HttpServletResponse response)
			throws Exception {
		BlogUser blogUser = new BlogUser();
		
		Set<BlogFile> file = new HashSet<BlogFile>();
		
		blogUser.setUserName("mousetsun");
		blogUser.setPassWordOne("111111");
		
		BlogFile blogFile = new BlogFile();
		blogFile.setFileName("aaa");
		blogFile.setFilePath("bbb");
		blogFile.setBlogUser(blogUser);
		file.add(blogFile);
		
		BlogFile blogFile1 = new BlogFile();
		blogFile1.setFileName("ccc");
		blogFile1.setFilePath("ddd");
		blogFile1.setBlogUser(blogUser);
		file.add(blogFile1);
		
		blogUser.setBlogFile(file);
		//spring...service 调用dao
		BlogUserService blogUserService = Locator
				.lookupService(BlogUserService.class);
		BlogUser user = blogUserService.insertUser(blogUser);
		//********
		System.out.println(user.getBlogFile().size());
		
		return mapping.findForward("index");
	}

---DAO

//GenericDaoHibernateImpl 是我自己写的一些hibernate常用接口方法
public class BlogUserDaoImpl extends GenericDaoHibernateImpl<BlogUser, Integer> implements BlogUserDao{

	public BlogUser insertUser(BlogUser blogUser) {
		// TODO Auto-generated method stub
		this.getHibernateTemplate().clear();
		blogUser = (BlogUser) this.getHibernateTemplate()
				.merge(blogUser);
		this.getHibernateTemplate().flush();
		return blogUser;
	}
}

PS: 有写的不好地方希望大家改正!

[K_JUN]

学习了，Hiernate感觉一定要清楚的了解3态（临时，持久，游离） 才能更好的使用和开发。。

[K_JUN]

学习了，Hiernate感觉一定要清楚的了解3态（临时，持久，游离） 才能更好的使用和开发。。

[cpoysy]

兄弟，你写错啦。

[cpoysy]

你
<set name="blogFile" inverse="true" lazy="true" cascade="all-delete-orphan">
<key>
<column name="userId" />
</key>
<one-to-many class="model.user.BlogFile"/>
</set>
..........
<many-to-one name="blogUser"
class="model.user.BlogUser">
<column name="createUserId" /> <!--createUserId 是blogUser的主键userId -->
</many-to-one>

红色的地方应该写一样的，要么都是userId,要么都是createUserId。

[wish_tiger]

学习

[Jacky_Zhu_1983]

[Quote=引用 4 楼 cpoysy 的回复:]
你
<set name="blogFile" inverse="true" lazy="true" cascade="all-delete-orphan">
<key>
<column name="userId" />
</key>
<one-to-many class="model.user.BlogFile"/>
</set>
..........
<many-to-one name="blogUser"
class="model.user.BlogUser">
<column name="createUserId" /> <!--createUserId 是blogUser的主键u…
[/Quote]


- -! 不一样也可以的.配置好了就OK!

[Jacky_Zhu_1983]

>_ < 帖子竟然沉了...顶起来!!!

[mirzlm]

小顶

[cchaha]

不错,多谢分享

[lvfeng180]

顶一下

[lvfeng180]

但是只保存进一条数据，怎么才能同时保存所有的子类数据。