Java 使用ajax更新另一个字段
视图:Java 使用ajax更新另一个字段,java,events,primefaces,Java,Events,Primefaces,视图: 控制器: <h:form id="ExamrequisitionsCreateForm"> <p:selectOneMenu id="examId" value="#{examrequisitionsController.selected.examId}" required="true" requiredMessage="#{bundle.EditExamrequisitionsRequiredMessage_examId}">
控制器:
<h:form id="ExamrequisitionsCreateForm">
<p:selectOneMenu id="examId" value="#{examrequisitionsController.selected.examId}" required="true" requiredMessage="#{bundle.EditExamrequisitionsRequiredMessage_examId}">
<f:selectItems value="#{examsController.itemsAvailableSelectOne}"
var="examIdItem"
itemValue="#{examIdItem}"/>
<f:ajax execute="@this" listener="#{examrequisitionsController.getPriceExam(examItem.id)}" render="ExamrequisitionsCreateForm:price" />
</p:selectOneMenu>
<p:inputText id="price" value="#{examrequisitionsController.selected.price}" title="#{bundle.CreateExamrequisitionsTitle_price}" required="true" requiredMessage="#{bundle.CreateExamrequisitionsRequiredMessage_price}">
</h:form>
public-BigDecimal-getPriceExam(int-id){
EntityManager em=Persistence.createEntityManager工厂(“系统心脏病学报告”).createEntityManager();
List examsList=em.createNamedQuery(“Exams.findById”)。
setParameter(“id”,id).getResultList();
返回examsList==null?null:examsList.get(0).getPrice();
}
在检查中执行事件change
后,我尝试更新字段price
。
我如何才能做到这一点?请尝试以下操作:
public BigDecimal getPriceExam(int id) {
EntityManager em = Persistence.createEntityManagerFactory("SystemCardiologyReportsPU").createEntityManager();
List<Exams> examsList = em.createNamedQuery("Exams.findById").
setParameter("id", id).getResultList();
return examsList == null ? null : examsList.get(0).getPrice();
}
<f:ajax execute="@this" listener="#{examrequisitionsController.getPriceExam(examItem.id)}" render="ExamrequisitionsCreateForm:price" />
<p:ajax listener="#{examrequisitionsController.updatePrice}" update="price"/>
public void updatePrice(){
EntityManager em=Persistence.createEntityManager工厂(“系统心脏病学报告”).createEntityManager();
List examsList=em.createNamedQuery(“Exams.findById”)。
setParameter(“id”,this.selected.examId).getResultList();
this.selected.price==null?null:examsList.get(0).getPrice();
}
您的侦听器只需要更新绑定到输入文本的值,而ajax调用只需要更新该值如果你能就你的问题投票,那将是很棒的。谢谢
public void updatePrice (){
EntityManager em = Persistence.createEntityManagerFactory("SystemCardiologyReportsPU").createEntityManager();
List<Exams> examsList = em.createNamedQuery("Exams.findById").
setParameter("id", this.selected.examId ).getResultList();
this.selected.price == null ? null : examsList.get(0).getPrice();
}