我遍历一个项目列表,如果元素的状态等于学生或教师,则需要显示特定的下拉列表.以下代码显示所有字段,但不显示任何元素的下拉列表!
<s:iterator value="listOfPeople" status="element">
.....
<s:if test='%{elements[#element.index].Status.equalsIgnoreCase("Student") ||
elements[#element.index].Status.equalsIgnoreCase("Teacher")}'>
<s:select name="elements[%{#element.index}].Status"
id="elements[%{#element.index}].Status"
label="Status"
list="#{'Student':'Student','Teacher':'Teacher'}"
headerKey = "-1"
headerValue=" "
value="%{Status}"
/>
</s:if>
在控制器中:
PeopleModel peopleModel = new PeopleModel();
listOfPeople = peopleModel.findPeople();
System.out.println("size is:" + listOfPeople.size()); //returns 8
return "listPeople";
我的型号:
List<People> people = new ArrayList();
final Session session = HibernateUtil.getSession();
try {
final Transaction tx = session.beginTransaction();
try {
Criteria criteria = session.createCriteria(People.class, "People")
people.addAll((List<People>) criteria.list());
if (!tx.wasCommitted()) {
tx.commit();
}
if (session.isOpen()) {
session.close();
}
System.out.println("size is ::: " …以前我使用以下代码来配置sessionFactory,但是在将我的hibernate版本从4.2.1.Final升级到4.3.4.Final后,我无法使用以下代码检索sessionFactory,因为不推荐使用ServiceRegistryBuilder().
我使用此链接创建它,但提供的函数没有返回任何东西,因此它遇到预编译错误.
private static SessionFactory configureSessionFactory() {
try {
Configuration configuration = new Configuration();
configuration.configure();
serviceRegistry = new ServiceRegistryBuilder().applySettings(configuration.getProperties()).buildServiceRegistry();
sessionFactory = configuration.buildSessionFactory(serviceRegistry);
return sessionFactory;
} catch (HibernateException e) {
System.out.append("** Exception in SessionFactory **");
e.printStackTrace();
}
return sessionFactory;
}
static {
try {
sessionFactory = configureSessionFactory();
} catch (Exception e) {
System.err.println("%%%% Error Creating SessionFactory %%%%");
e.printStackTrace();
}
}
private HibernateUtil() {
}
public static SessionFactory getSessionFactory() {
return sessionFactory;
}
public static Session getSession() throws HibernateException { …我在GlassFish上运行我的应用程序,我使用Spring Security和Hibernate.当我运行应用程序时,GlassFish控制台上将显示以下警告和错误.我该如何避免它们？
WARNING: The web application [] registered the JDBC driver [com.mysql.jdbc.Driver] but failed to unregister it when the web application was stopped. To prevent a memory leak, the JDBC Driver has been forcibly unregistered.
SEVERE: The web application [] created a ThreadLocal with key of type [java.lang.ThreadLocal] (value [java.lang.ThreadLocal@1087985b]) and a value of type [org.hibernate.internal.SessionImpl] (value [SessionImpl(PersistenceContext[entityKeys=[],collectionKeys=[]];ActionQueue[insertions=[] updates=[] deletions=[] collectionCreations=[] collectionRemovals=[] collectionUpdates=[] unresolvedInsertDependencies=UnresolvedEntityInsertActions[]])]) but failed to remove it when the web application was stopped. Threads are going to be …我有一个包含以下字段的搜索表单
price, status, owner
当用户填写所有字段时,请求将被发送到后端以显示具有指定价格,状态和所有者的产品的类别列表.用户可以单击每个类别以查看其产品列表.
为了实现它,我有以下方法来检索类别,并将搜索字段(价格,状态,所有者)放入会话中以在搜索的下一页中可用(当选择类别时).
参数的值可能太长了,我更喜欢将它们作为GET来轻松地为结果添加书签.
public String retrieveCategories(){
//... here I retrieve categories which their products are matched
//with the search fields
Map session = ActionContext.getContext().getSession();
session.put("Items", this.items);
return "SUCCESS";
}
显示所有类别后,用户可以单击每个类别以查看其产品.类别的名称将发送到后端,因此我将从会话中检索值以搜索具有所选类别的相同规格的产品.
public String retrieveProductsOfSelectedCategory(){
Map session = ActionContext.getContext().getSession();
this.items = (Items) session.get("Items");
//... here I retrieve products of the selected category based on values retrieved
// from session
}
我想知道如果不是你的建议,实施它是否是一个好习惯？