发表新闻的逻辑门面（CreateNewsItemAction.Java）
public ActionForward execute(ActionMapping mapping, ActionForm form,
HttpServletRequest request, HttpServletResponse response) throws Exception {
//假如点击”cancel”,返回发表新闻页面
if ( isCancelled(request) ) {
return mapping.findForward("callCreateItem");
}
if( request.getSession().getAttribute(NewsModuleWebConstants.NEWS_ITEM_
SUBMITTED_ACTION) == null ) {
request.getSession().setAttribute(NewsModuleWebConstants.
NEWS_ITEM_SUBMITTED_ACTION, "create");
NewsItemForm newsItemForm = (NewsItemForm) form;
//申明NewsItem的对象，并给该对象赋值
NewsItem newsItem = new NewsItem();
//利用BeanUtils.copyProperties直接拷贝属性构造newsItem对象
WebappUtil.copyProperties(newsItem, newsItemForm, request);
//newsItem和NewsItemForm对象间存在名称不相同的属性，
//则BeanUtils不对这些属性进行处理，需要程序员手动处理
newsItem.setActive(Boolean.TRUE);
newsItem.setTitle(newsItemForm.getTitleMap());
newsItem.setAnnotation(newsItemForm.getAnnotationMap());
newsItem.setBody(newsItemForm.getBodyMap());
//获得DAOManager对象，类型在Spring配置，指向类NewsManagerImpl
NewsManager newsManager =
(NewsManager) getBean(NewsModuleConstants.
NEWS_MANAGER_BEAN);（1）
Long newsItemId = null;
String uri = null;
try {
//通过NewsItemManager建立新闻实体
newsItemId = newsManager.createNewsItem(newsItem);
uri = NewsModuleWebConstants.NEWS_ITEM_URI_PREFIX + "/" +
newsItemId;
newsItem.setUri(uri);
newsManager.updateNewsItem(newsItem);
if ( newsItem.getActive().booleanValue() ) {
// index news item
SearchManager searchManager =
SearchManager.getInstance(request.getSession().
getServletContext());
searchManager.reIndeXPage(newsItem, request);
}
} catch ( BeanAlreadyExistsException e ) {
… …
return mapping.getInputForward();
}
}
return mapping.findForward("listNewsItems");
}
}
（1）DAO治理类NewsManagerImpl类中的处理
public Long createNewsItem(NewsItem newsItem) throws BeanAlreadyExistsException {
//在Manager类中，应用将具体操作委派个具体的DAO类
if ( pageDAO.hasDuplicates(newsItem) ) { （2）
… …
throw new BeanAlreadyExistsException(errorMessage);
// linkable item does not exist
Long newsItemId = newsDAO.createNewsItem(newsItem);（4）
return newsItemId;
}
（2）解释, PageDAOHibernate类中判定新闻的URL信息是否有重复
public boolean hasDuplicates(Page page) {
ArrayList args = new ArrayList();
args.add(page.getUri());
String hql = "select count(p.id) from Page p where p.uri = ?";
if ( page.getId() != null ) {
hql += " and p.id != ?";
args.add(page.getId());
}
int count = ((Integer) findUniqueResult(hql, args.toArray())).intValue();（3）
return count 0;
}
（3）的解释，BaseDAOHibernate类
public Object findUniqueResult(final String hql, final Object[] args, final Type[]
types, final boolean cacheable, final String cacheRegion) {
//使用内隐类
return getHibernateTemplate().execute(new HibernateCallback() {
public Object doInHibernate(Session session) throws HibernateException {
Query query = session.createQuery(hql);
query.setCacheable(cacheable);
if ( cacheRegion != null ) {
query.setCacheRegion(cacheRegion);
}
//查询参数赋值
if ( args != null ) {
for ( int i = 0; i < args.length; i++ ) {
Object arg = args[i];
Type type = null;
if ( types != null && i < types.length ) {
type = types[i];
}
if ( type == null ) {
query.setParameter(i, arg);
} else {
query.setParameter(i, arg, type);
}
}
}
return query.uniqueResult();
}
});
（4）的解释，NewsDAOHibernate类，这里是写入数据库的主要逻辑
public Long createNewsItem(NewsItem newsItem) {
//写入news_item表
newsItem.setUsageCounter(new Integer(0));
Long newsItemId = (Long) getHibernateTemplate().save(newsItem);
//写入field表
// title
ContentField fTitle = new ContentField();
fTitle.setIdentifier("title");
fTitle.setType(ContentField.LINE_TYPE);
fTitle.setInternal(Boolean.TRUE);
newsItem.addContentField(fTitle);
getHibernateTemplate().save(fTitle);
// annotation
ContentField fAnnotation = new ContentField();
fAnnotation.setIdentifier("annotation");
fAnnotation.setType(ContentField.Html_TYPE);
fAnnotation.setInternal(Boolean.TRUE);
newsItem.addContentField(fAnnotation);
getHibernateTemplate().save(fAnnotation);
// body
ContentField fBody = new ContentField();
fBody.setIdentifier("body");
fBody.setType(ContentField.HTML_TYPE);
fBody.setInternal(Boolean.TRUE);
newsItem.addContentField(fBody);
getHibernateTemplate().save(fBody);
//写入field_value表
List contentLocales = executeFind("from ContentLocale l", true, null);
for ( int i = 0; i < contentLocales.size(); i++ ) {
ContentLocale contentLocale = (ContentLocale) contentLocales.get(i);
String localeIdentifier = contentLocale.getIdentifier();
String valueTitle = (String) newsItem.getTitle().get(localeIdentifier);
String valueAnnotation = (String)
newsItem.getAnnotation().get(localeIdentifier);
String valueBody = (String) newsItem.getBody().get(localeIdentifier);
if ( (valueTitle == null valueTitle.trim().length() == 0) && (valueAnnotation == null valueAnnotation.trim().length() == 0) && (valueBody == null valueBody.trim().length() == 0) ) {
continue;
}
//title
ContentFieldValue fvTitle = new ContentFieldValue();
fvTitle.setContentLocale(contentLocale);
if ( valueTitle != null ) {
fvTitle.setSimpleValue(valueTitle);
} else {
fvTitle.setSimpleValue("");
}
fvTitle.setLastUpdatedDatetime(new Date());
fTitle.addContentFieldValue(fvTitle);
getHibernateTemplate().save(fvTitle);
//annotation
ContentFieldValue fvAnnotation = new ContentFieldValue();
fvAnnotation.setContentLocale(contentLocale);
if ( valueAnnotation != null ) {
fvAnnotation.setValue(ConvertUtil.convertToByteArray(valueAnnotation));
} else {
fvAnnotation.setValue(new byte[0]);
