Question

我在hashmap中有一些要更新的字段，我试图把它放在 session.update（对象对象）中。但我得到异常错误未知实体：java.util.HashMap 。这是我的代码。

 class_name.addCondition("loginName", "dadan_evil"); 
    class_name.addCondition("lastName", "Pirate");
    session.update(filter.getFilterMap());//I tried this, but not working

更新这些字段：

<?xml version="1.0" encoding="utf-8"?>
<!DOCTYPE hibernate-mapping PUBLIC 
 "-//Hibernate/Hibernate Mapping DTD//EN"
 "http://www.hibernate.org/dtd/hibernate-mapping-3.0.dtd"> 

<hibernate-mapping>
   <class name="in.co.User" table="user">
      <meta attribute="class-description">
         This class contains the user detail. 
      </meta>
      <id name = "loginName" type="string" column="loginName">

      </id>
      <property name="passCode" column="passCode" type="string"/>
      <property name="firstName" column="firstName" type="string"/>
      <property name="lastName" column="lastName" type="string"/>
      <property name="alternateEMail" column="alternateEMail" type="string"/>
      <property name="mobile" column="mobile" type="string"/>
      <property name="sysAdmin" column="sysAdmin" type="boolean"/>
      <property name="deleted" column="deleted" type="boolean"/>
      <property name="authenticationCode" column="authenticationCode" type="string"/>
      <property name="authenticated" column="authenticated" type="boolean"/>

   </class>
</hibernate-mapping>

User.hbm.xml：

private static void updateFromQuery(DBFilter filter) throws Exception {
        Session session = factory.openSession();

        try{
            Class<?> className = filter.getCollectionClass();
            Criteria criteria = session.createCriteria(className);
            criteria.add(Restrictions.allEq(filter.getFilterMap()));
            //I dont know how to update this, just an imaginary parameter
            session.update(filter.getFilterMap());

        }catch(HibernateException e){
            e.printStackTrace();
        }finally{
            session.close();
        }
    }

我的更新方法：

<h4>Angular-xeditable Editable row (Bootstrap 3)</h4>
<div ng-app="app" ng-controller="Ctrl">
   <table class="table table-bordered table-hover table-condensed">
    <tr style="font-weight: bold">
      <td style="width:35%">Name</td>
      <td style="width:20%">Status</td>
      <td style="width:20%">Group</td>
      <td style="width:25%">Edit</td>
    </tr>
    <tr ng-repeat="user in users">
      <td>
        <!-- editable username (text with validation) -->
        <span editable-text="user.name" e-name="name" e-form="rowform" onbeforesave="checkName($data, user.id)" e-required>
          {{ user.name || 'empty' }}
        </span>
      </td>
      <td>
        <!-- editable status (select-local) -->
        <span editable-select="user.status" e-name="status" e-form="rowform" e-ng-options="s.value as s.text for s in statuses">
          {{ showStatus(user) }}
        </span>
      </td>
      <td>
        <!-- editable group (select-remote) -->
        <span editable-select="user.group" e-name="group" onshow="loadGroups()" e-form="rowform" e-ng-options="g.id as g.text for g in groups">
          {{ showGroup(user) }}
        </span>
      </td>
      <td style="white-space: nowrap">
        <!-- form -->
        <form editable-form name="rowform" onbeforesave="saveUser($data, user.id)" ng-show="rowform.$visible" class="form-buttons form-inline" shown="inserted == user">
          <button type="submit" ng-disabled="rowform.$waiting" class="btn btn-primary">
            save
          </button>
          <button type="button" ng-disabled="rowform.$waiting" ng-click="rowform.$cancel()" class="btn btn-default">
            cancel
          </button>
        </form>
        <div class="buttons" ng-show="!rowform.$visible">
          <button class="btn btn-primary" ng-click="rowform.$show()">edit</button>
          <button class="btn btn-danger" ng-click="removeUser($index)">del</button>
        </div>  
      </td>
    </tr>
  </table>

  <button class="btn btn-default" ng-click="addUser()">Add row</button>
</div>

我无法写下字符串查询，因为我有多个表和不同的值。我甚至动态地获得了类Names。所以我不能使用字符串查询对所有人都是通用的。那么，如果可以，请告诉我。

现在，如何将这两个值更新到数据库。请帮忙

Answer 1

我是通过使用 java.lang.reflect.Field 完成的。所以我从数据库中检索了特定的对象，我将获得键和值与Map分离，并通过引用我需要的类与Field绑定。现在这个工作正常。即使我得到比我更好的答案，也没关系。

private static void setField(Class<?> class_name,Object object, String fieldName, Object value) throws Exception {
        Field field = class_name.getDeclaredField(fieldName);       
        field.setAccessible(true);
        field.set(object, value);       
    }

    private static void updateFromQuery(DBFilter filter) throws Exception {
        Session session = factory.openSession();

        try {
            Class<?> className = filter.getCollectionClass();
            Criteria criteria = session.createCriteria(className);
            criteria.add(Restrictions.allEq(filter.getFilterMap()));
            List objectList = criteria.list();
            Transaction tx;
            tx = session.beginTransaction();
            for (Object object : objectList) {
                for (Map.Entry<String, Object> entry : filter.getValueMap().entrySet()) {
                    setField(className,object, entry.getKey(), entry.getValue());
                }
                session.update(object);
            }
            tx.commit();
        } catch (HibernateException e) {
            e.printStackTrace();
        } finally {
            session.close();
        }
    }

感谢所有支持的人。

是否可以更新特定的字段休眠

1 个答案: