• 好久没有更新了

    2004-03-30

    Tag：

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    http://piginzoo.blogbus.com/logs/123187.html

    multibox使用过程中，参考：http://www.jguru.com/faq/view.jsp?EID=925277
     ACCOUNT是setAttribute中的属性，
    <logic:iterate id="role" name="ACCOUNT" property="roleList">
      <html:multibox property="selectedRoles">
       <bean:write name="role" property="value"/>
      </html:multibox>
       <bean:write name="role" property="label"/>
    </logic:iterate>
    <html:submit property="submit" value="提交"/>
    </html:form>
    采用mutilbox和LabelValueBean的方式来实现checkbox，对于roles要采用一个LableValueBean的List,对于selectedRoles要采用String数据的方式，至于为什么，需要看一看Multi的tag的源代码。

      List roleList = new ArrayList();
      for(int i=0;i<roles.size();i++){
       String guid = ((RoleBO)roles.get(i)).getGuid().trim();
       String name = ((RoleBO)roles.get(i)).getName().trim();
       roleList.add(new LabelValueBean(name,guid));
      }

    ==============================================

    对于树状的数据结构的存储和读取，采用了hibernate，很爽

    下面是它的hbm.xml

    <?xml version="1.0"?>

    <!DOCTYPE hibernate-mapping PUBLIC
        "-//Hibernate/Hibernate Mapping DTD 2.0//EN"
        "http://hibernate.sourceforge.net/hibernate-mapping-2.0.dtd">

    <hibernate-mapping>
        <class
            name="com.chinacomm.ccis.coa.document.bo.CategoryBO"
            table="COADoc_Category"
            dynamic-update="false"
            dynamic-insert="false"
        >

            <id
                name="guid"
                column="CATEGORY_GUID"
                type="java.lang.String"
            >
                <generator class="assigned">
                </generator>
            </id>

            <property
                name="desc"
                type="java.lang.String"
                update="true"
                insert="true"
                column="CATEGORY_DESC"
            />

            <property
                name="name"
                type="java.lang.String"
                update="true"
                insert="true"
                column="CATEGORY_NAME"
            />

            <property
                name="no"
                type="java.lang.Integer"
                update="true"
                insert="true"
                column="CATEGORY_NO"
            />

            <many-to-one
                name="parent"
                class="com.chinacomm.ccis.coa.document.bo.CategoryBO"
                cascade="all"
                outer-join="auto"
                update="false"
                insert="false"
                column="CATEGORY_PARENT_ID"
            />

            <set
                name="children"
                table="CoaDoc_category"
                lazy="false"
                inverse="true"
                cascade="all"
                sort="unsorted"
            >

                  <key
                      column="CATEGORY_PARENT_ID"
                  />

                  <one-to-many
                      class="com.chinacomm.ccis.coa.document.bo.CategoryBO"
                  />
            </set>

            <property
                name="parentGuid"
                type="java.lang.String"
                update="true"
                insert="true"
                column="CATEGORY_PARENT_ID"
            />

            <!--
                To add non XDoclet property mappings, create a file named
                    hibernate-properties-CategoryBO.xml
                containing the additional properties and place it in your merge dir.
            -->

        </class>

    </hibernate-mapping>

    -------------------------

    代码中需要定义以下属性

     private Set children = new HashSet();
      private CategoryBO parent;
      //父节点的id

    -------------------------

    查找到最高级别的父亲节点，就可以还原出这棵树：

    bo = (CategoryBO)session.get(CategoryBO.class,"{000000000000000000000000000000000000}");

     

    对于更新和创建：

     2004-03-29 15:14:10,291 [ERROR] - 提交事务时发生异常：net.sf.hibernate.HibernateException: SQL insert, update or delete failed (row not found) (DAOImpl.java:57)
     (db.CategoryDAOOracleImpl            57  ) 提交事务时发生异常：net.sf.hibernate.HibernateException: SQL insert, update or delete failed (row not found)
     Hibernate: update COADoc_Category set CATEGORY_DESC=?, CATEGORY_NAME=?, CATEGORY_NO=?, CATEGORY_PARENT_ID=? where CATEGORY_GUID=?
     net.sf.hibernate.HibernateException: SQL insert, update or delete failed (row not found)
     at net.sf.hibernate.impl.NonBatchingBatcher.addToBatch(NonBatchingBatcher.java:25)
     at net.sf.hibernate.persister.EntityPersister.update(EntityPersister.java:688)
     到了也没有找出什么原因，创建不成，我就试验了一下查找，我靠，居然可以，看来只有用它的复合特性来进行数据装载了，而不能用于更新。算啦，还是使用标准的方式存取Category了，即使用parentGuid，而不是parentBO了


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