如何在Struts2中實現休眠攔截器

Question

在我的Struts2應用程序中，我想使用Hibernate攔截器審核所有CURD操作，請幫助我如何實現。

Answer 1

您可以通過擴展EmptyInterceptor來創建攔截器，請閱讀文檔：

第十二章攔截器和事件

該文檔提供了有關如何使用攔截器實施審核的示例。

另外，這里還有另一個類似功能的示例 ： Hibernate攔截器示例–審核日志

Answer 2

您可以通過實現Interceptor或擴展EmptyInterceptor來創建XXXDAO類。 如果使用Interceptor接口，則使用下面的覆蓋方法將數據保存在單獨的表中。

 public boolean onLoad(Object o, Serializable srlzbl, Object[] os, String[] strings, Type[] types) throws CallbackException {
    throw new UnsupportedOperationException("Not supported yet.");
}

public boolean onFlushDirty(Object o, Serializable srlzbl, Object[] os, Object[] os1, String[] strings, Type[] types) throws CallbackException {
    throw new UnsupportedOperationException("Not supported yet.");
}

public boolean onSave(Object o, Serializable srlzbl, Object[] os, String[] strings, Type[] types) throws CallbackException {
    throw new UnsupportedOperationException("Not supported yet.");
}

public void onDelete(Object o, Serializable srlzbl, Object[] os, String[] strings, Type[] types) throws CallbackException {
    throw new UnsupportedOperationException("Not supported yet.");
}

public void onCollectionRecreate(Object o, Serializable srlzbl) throws CallbackException {
    throw new UnsupportedOperationException("Not supported yet.");
}

public void onCollectionRemove(Object o, Serializable srlzbl) throws CallbackException {
    throw new UnsupportedOperationException("Not supported yet.");
}

public void onCollectionUpdate(Object o, Serializable srlzbl) throws CallbackException {
    throw new UnsupportedOperationException("Not supported yet.");
}

public void preFlush(Iterator itrtr) throws CallbackException {
    throw new UnsupportedOperationException("Not supported yet.");
}

public void postFlush(Iterator itrtr) throws CallbackException {
    throw new UnsupportedOperationException("Not supported yet.");
}

public Boolean isTransient(Object o) {
    throw new UnsupportedOperationException("Not supported yet.");
}

public int[] findDirty(Object o, Serializable srlzbl, Object[] os, Object[] os1, String[] strings, Type[] types) {
    throw new UnsupportedOperationException("Not supported yet.");
}

public Object instantiate(String string, EntityMode em, Serializable srlzbl) throws CallbackException {
    throw new UnsupportedOperationException("Not supported yet.");
}

public String getEntityName(Object o) throws CallbackException {
    throw new UnsupportedOperationException("Not supported yet.");
}

public Object getEntity(String string, Serializable srlzbl) throws CallbackException {
    throw new UnsupportedOperationException("Not supported yet.");
}

public void afterTransactionBegin(Transaction t) {
    throw new UnsupportedOperationException("Not supported yet.");
}

public void beforeTransactionCompletion(Transaction t) {
    throw new UnsupportedOperationException("Not supported yet.");
}

public void afterTransactionCompletion(Transaction t) {
    throw new UnsupportedOperationException("Not supported yet.");
}


public String onPrepareStatement(String string) {
    throw new UnsupportedOperationException("Not supported yet.");
}

如果擴展EmptyInterceptor不需要覆蓋所有方法，則必需的方法可以在您的dao類中覆蓋。

例如，我必須在我的Audit表中為save()方法存儲fieldName ， fieldValue ， fieldType ， className 。

//Audit save Pojo 
public class AuditSave{
  private String className;
  private String fieldName
  private String fieldValue
  private String fieldType
  //setter's and getter's
}
//AuditDAO class
public class AuditDao exteds EmptyInterceptor{

   public boolean onSave(Object o, Serializable srlzbl, Object[] os, String[] strings,
   Type[] types) throws CallbackException {
   Session session = HibernateUtil.getSessionFactory().openSesson();
   String className = o.getClass().getName();
    try{
       Transaction tx = session.beginTransaction();
       for(int i = 0;i < os.length ;i++){
          AuditSave auditSave = new AuditSave();
          auditSave.setClassName(className);
          auditSave.setFieldName((String)strings[i]);
          auditSave.setFieldValue((String)os[i]);
          auditSave.setFieldType(types[i].toString());

          session.save(auditSave);
          tx.commit();
       }catch(Exception e){
          tx.rollback();
          e.printStackTra;
       }
   if(session.isOpen())
          session.close();
   }
       return true;
    }
 // same as update,delete

對於刪除，請使用onDelete()方法；對於更新，請使用findDirty()方法