package com.vaadin.ui.view;
public class AddConsumerView extends FormLayout{
private ConsumerUI consumerUI;
@Autowired
private ConsumerServiceInterface consumerServiceInterface;
//horizontal layout for the id's
private HorizontalLayout consumerIDLayout = new HorizontalLayout();
private TextField consumer_id = new TextField("Consumer Id");
private TextField household_id = new TextField("Household Id");
private TextField legal_hold = new TextField("Legal Hold");
private TextField deceased_fg = new TextField("Deceased");
private DateTimeField deceased_dt = new DateTimeField("Deceased DateTime");
//Horizontal layout for the INS
private HorizontalLayout consumerINSLayout = new HorizontalLayout();
private TextField ins_pqid = new TextField("Ins PQID");
private TextField ins_rid = new TextField("Ins RID");
private TextField ins_efid = new TextField("Ins EFID");
private DateTimeField ins_tmstmp = new DateTimeField("Ins Date time");
// Horizontal layout for the UPD
private HorizontalLayout consumerUPDLayout = new HorizontalLayout();
private TextField upd_pqid = new TextField("Upd PQID");
private TextField upd_rid= new TextField("Upd RID");
private TextField upd_efid = new TextField("Upd EFID");
private DateTimeField upd_tmstmp = new DateTimeField("Upd Date time");
private Consumer consumerData = new Consumer();
//Buttons
private Button saveConsumerButton = new Button("save");
//binding the data to the field
private Binder<Consumer> consumerBinder = new Binder<>(Consumer.class);
public AddConsumerView(ConsumerUI consumerUI) {
this.consumerUI = consumerUI;
consumerIDLayout.addComponents(consumer_id, household_id, legal_hold, deceased_dt,deceased_fg);
consumerINSLayout.addComponents(ins_pqid, ins_rid, ins_efid, ins_tmstmp);
consumerUPDLayout.addComponents(upd_pqid,upd_rid, upd_efid, upd_tmstmp);
VerticalLayout vertical = new VerticalLayout();
vertical.addComponents(consumerIDLayout, consumerINSLayout,
consumerUPDLayout,saveConsumerButton);
//addComponent(vertical);
bindFields();
consumerBinder.setBean(new Consumer());
saveConsumerButton.setStyleName("primary");
saveConsumerButton.addClickListener(e->saveConsumer());
addComponents(vertical);
}
public void saveConsumer() {
//consumerBinder.bindInstanceFields(this);
System.out.println(consumerBinder.getBean().toString());
consumerServiceInterface.addConsumer(consumerBinder.getBean());
}
public void bindFields() {
consumerBinder.forField(consumer_id)
.withConverter(new StringToLongConverter("Must be a number"))
.bind(Consumer::getConsumer_id,Consumer::setConsumer_id);
consumerBinder.forField(legal_hold)
.bind(Consumer::getLegal_hold, Consumer::setLegal_hold);
consumerBinder.forField(deceased_fg)
.bind(Consumer::getDeceased_fg, Consumer::setDeceased_fg);
consumerBinder.forField(household_id)
.withConverter(new StringToLongConverter("Must be a number"))
.bind(Consumer::getHousehold_id,Consumer::setHousehold_id);
consumerBinder.forField(ins_efid)
.withConverter(new StringToLongConverter("Must be a number"))
.bind(Consumer::getIns_efid,Consumer::setIns_efid);
consumerBinder.forField(ins_pqid)
.withConverter(new StringToLongConverter("Must be a number"))
.bind(Consumer::getIns_pqid,Consumer::setIns_pqid);
consumerBinder.forField(ins_rid)
.withConverter(new StringToLongConverter("Must be a number"))
.bind(Consumer::getIns_rid,Consumer::setIns_rid);
consumerBinder.forField(upd_efid)
.withConverter(new StringToLongConverter("Must be a number"))
.bind(Consumer::getUpd_efid,Consumer::setUpd_efid);
consumerBinder.forField(upd_pqid)
.withConverter(new StringToLongConverter("Must be a number"))
.bind(Consumer::getUpd_pqid,Consumer::setUpd_pqid);
consumerBinder.forField(upd_rid)
.withConverter(new StringToLongConverter("Must be a number"))
.bind(Consumer::getUpd_rid,Consumer::setUpd_rid);
consumerBinder.forField(upd_tmstmp)
.withConverter(new StringTimestampConvertor())
.bind(Consumer::getUpd_tmstmp, Consumer::setUpd_tmstmp);
consumerBinder.forField(ins_tmstmp)
.withConverter(new StringTimestampConvertor())
.bind(Consumer::getIns_tmstmp, Consumer::setIns_tmstmp);
consumerBinder.forField(deceased_dt)
.withConverter(new StringTimestampConvertor())
.bind(Consumer::getDeceased_dt, Consumer::setDeceased_dt);
consumerBinder.forField(upd_tmstmp)
.withConverter(new StringTimestampConvertor())
.bind(Consumer::getUpd_tmstmp, Consumer::setUpd_tmstmp);
}
}
StringTimestampConvertor类
**package com.vaadin.convertor;
@SuppressWarnings("serial")
public class StringTimestampConvertor implements Converter<LocalDateTime, Timestamp> {
@SuppressWarnings("unchecked")
public Result<Timestamp> convertToModel(LocalDateTime value, ValueContext context) {
System.out.println("check"+value);
Result<Timestamp> rs = Result.ok(Timestamp.valueOf(value));
return rs;
}
@Override
public LocalDateTime convertToPresentation(Timestamp value, ValueContext context) {
// TODO Auto-generated method stub
return null;
}
}
**
sysout正在工作，但是saveConsumer函数给出空错误，并且stringtimestampconvertor也正在运行多次。
java.lang.NullPointerException：为nullcom.vaadin.ui.view.AddConsumerView.saveConsumer（AddConsumerView.java:82）〜[classes /：na]在com.vaadin.ui.view.AddConsumerView.lambda $ 0（AddConsumerView.java:71）〜[classes /：na]在com.vaadin.ui.view.AddConsumerView $$ Lambda $ 1501 / 954546734.buttonClick（未知来源）〜[na：na]在sun.reflect.GeneratedMethodAccessor433.invoke（未知来源）〜[na：na]在sun.reflect.DelegatingMethodAccessorImpl.invoke（未知来源）〜[na：1.8.0_45]，位于java.lang.reflect.Method.invoke（未知源）〜[na：1.8.0_45]在com.vaadin.event.ListenerMethod.receiveEvent（ListenerMethod.java:510）〜[vaadin-server-8.0.0.jar：8.0.0]在com.vaadin.event.EventRouter.fireEvent（EventRouter.java:211）〜[vaadin-server-8.0.0.jar：8.0.0]在com.vaadin.event.EventRouter.fireEvent（EventRouter.java:174）〜[vaadin-server-8.0.0.jar：8.0.0]在com.vaadin.server.AbstractClientConnector.fireEvent（AbstractClientConnector.java:1029）〜[vaadin-server-8.0.0.jar：8.0.0]在com.vaadin.ui.Button.fireClick（Button.java:370）〜[vaadin-server-8.0.0.jar：8.0.0]在com.vaadin.ui.Button $ 1.click（Button.java:57）〜[vaadin-server-8.0.0.jar：8.0.0]在sun.reflect.GeneratedMethodAccessor432.invoke（未知来源）〜[na：na]在sun.reflect.DelegatingMethodAccessorImpl.invoke（未知来源）〜[na：1.8.0_45]，位于java.lang.reflect.Method.invoke（未知源）〜[na：1.8.0_45]在com.vaadin.server.ServerRpcManager.applyInvocation（ServerRpcManager.java:155）〜[vaadin-server-8.0.0.jar：8.0.0]在com.vaadin.server.ServerRpcManager.applyInvocation（ServerRpcManager.java:116）〜[vaadin-server-8.0.0.jar：8.0.0]在com.vaadin.server.communication.ServerRpcHandler.handleInvocation（ServerRpcHandler.java:443）[vaadin-server-8.0.0.jar：8.0.0]位于com.vaadin.server.communication.ServerRpcHandler.handleInvocations（ServerRpcHandler.java:415）[vaadin-server-8.0.0.jar：8.0.0]位于com.vaadin.server.communication.ServerRpcHandler.handleRpc（ServerRpcHandler.java:274）[vaadin-server-8.0.0.jar：8.0.0]位于com.vaadin.server.communication.UidlRequestHandler.synchronizedHandleRequest（UidlRequestHandler.java:90）[vaadin-server-8.0.0.jar：8.0.0]位于com.vaadin.server.SynchronizedRequestHandler.handleRequest（SynchronizedRequestHandler.java:41）[vaadin-server-8.0.0.jar：8.0.0]位于com.vaadin.server.VaadinService.handleRequest（VaadinService.java:1464）[vaadin-server-8.0.0.jar：8.0.0]位于com.vaadin.server.VaadinServlet.service（VaadinServlet.java:380）[vaadin-server-8.0.0.jar：8.0.0]位于javax.servlet.http.HttpServlet.service（HttpServlet.java:742）[tomcat-embed-core-8.5.29.jar：8.5.29]在org.apache.catalina.core.ApplicationFilterChain.internalDoFilter（ApplicationFilterChain.java:231）[tomcat-embed-core-8.5.29.jar：8.5.29]在org.apache.catalina.core.ApplicationFilterChain.doFilter（ApplicationFilterChain.java:166）[tomcat-embed-core-8.5.29.jar：8.5.29]在org.apache.tomcat.websocket.server.WsFilter.doFilter（WsFilter.java:52）[tomcat-embed-websocket-8.5.29.jar：8.5.29]在org.apache.catalina.core.ApplicationFilterChain.internalDoFilter（ApplicationFilterChain.java:193）[tomcat-embed-core-8.5.29.jar：8.5.29]在org.apache.catalina.core.ApplicationFilterChain.doFilter（ApplicationFilterChain.java:166）[tomcat-embed-core-8.5.29.jar：8.5.29]在org.springframework.web.filter.RequestContextFilter.doFilterInternal（RequestContextFilter.java:99）[spring-web-5.0.5.RELEASE.jar：5.0.5.RELEASE]在org.springframework.web.filter.OncePerRequestFilter.doFilter（OncePerRequestFilter.java:107）[spring-web-5.0.5.RELEASE.jar：5.0.5.RELEASE]在org.apache.catalina.core.ApplicationFilterChain.internalDoFilter（ApplicationFilterChain.java:193）[tomcat-embed-core-8.5.29.jar：8.5.29]在org.apache.catalina.core.ApplicationFilterChain.doFilter（ApplicationFilterChain.java:166）[tomcat-embed-core-8.5.29.jar：8.5.29]在org.springframework.web.filter.HttpPutFormContentFilter.doFilterInternal（HttpPutFormContentFilter.java:109）[spring-web-5.0.5.RELEASE.jar：5.0.5.RELEASE]在org.springframework.web.filter.OncePerRequestFilter.doFilter（OncePerRequestFilter.java:107）[spring-web-5.0.5.RELEASE.jar：5.0.5.RELEASE]在org.apache.catalina.core.ApplicationFilterChain.internalDoFilter（ApplicationFilterChain.java:193）[tomcat-embed-core-8.5.29.jar：8.5.29]在org.apache.catalina.core.ApplicationFilterChain.doFilter（ApplicationFilterChain.java:166）[tomcat-embed-core-8.5.29.jar：8.5.29]在org.springframework.web.filter.HiddenHttpMethodFilter.doFilterInternal（HiddenHttpMethodFilter.java:81）[spring-web-5.0.5.RELEASE.jar：5.0.5.RELEASE]在org.springframework.web.filter.OncePerRequestFilter.doFilter（OncePerRequestFilter.java:107）[spring-web-5.0.5.RELEASE.jar：5.0.5.RELEASE]在org.apache.catalina.core.ApplicationFilterChain.internalDoFilter（ApplicationFilterChain.java:193）[tomcat-embed-core-8.5.29.jar：8.5.29]在org.apache.catalina.core.ApplicationFilterChain.doFilter（ApplicationFilterChain.java:166）[tomcat-embed-core-8.5.29.jar：8.5.29]在org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal（CharacterEncodingFilter.java:200）[spring-web-5.0.5.RELEASE.jar：5.0.5.RELEASE]在org.springframework.web.filter.OncePerRequestFilter.doFilter（OncePerRequestFilter.java:107）[spring-web-5.0.5.RELEASE.jar：5.0.5.RELEASE]在org.apache.catalina.core.ApplicationFilterChain.internalDoFilter（ApplicationFilterChain.java:193）[tomcat-embed-core-8.5.29.jar：8.5.29]在org.apache.catalina.core.ApplicationFilterChain.doFilter（ApplicationFilterChain.java:166）[tomcat-embed-core-8.5.29.jar：8.5.29]在org.apache.catalina.core.StandardWrapperValve.invoke（StandardWrapperValve.java:198）[tomcat-embed-core-8.5.29.jar：8.5.29]在org.apache.catalina.core.StandardContextValve.invoke（StandardContextValve.java:96）[tomcat-embed-core-8.5.29.jar：8.5.29]在org.apache.catalina.authenticator.AuthenticatorBase.invoke（AuthenticatorBase.java:496）[tomcat-embed-core-8.5.29.jar：8.5.29]在org.apache.catalina.core.StandardHostValve.invoke（StandardHostValve.java:140）[tomcat-embed-core-8.5.29.jar：8.5.29]在org.apache.catalina.valves.ErrorReportValve.invoke（ErrorReportValve.java:81）[tomcat-embed-core-8.5.29.jar：8.5.29]在org.apache.catalina.core.StandardEngineValve.invoke（StandardEngineValve.java:87）[tomcat-embed-core-8.5.29.jar：8.5.29]在org.apache.catalina.connector.CoyoteAdapter.service（CoyoteAdapter.java:342）[tomcat-embed-core-8.5.29.jar：8.5.29]在org.apache.coyote.http11.Http11Processor.service（Http11Processor.java:803）[tomcat-embed-core-8.5.29.jar：8.5.29]在org.apache.coyote.AbstractProcessorLight.process（AbstractProcessorLight.java:66）[tomcat-embed-core-8.5.29.jar：8.5.29]在org.apache.coyote.AbstractProtocol $ ConnectionHandler.process（AbstractProtocol.java:790）[tomcat-embed-core-8.5.29.jar：8.5.29]在org.apache.tomcat.util.net.NioEndpoint $ SocketProcessor.doRun（NioEndpoint.java:1459）[tomcat-embed-core-8.5.29.jar：8.5.29]在org.apache.tomcat.util.net.SocketProcessorBase.run（SocketProcessorBase.java:49）[tomcat-embed-core-8.5.29.jar：8.5.29]在java.util.concurrent.ThreadPoolExecutor.runWorker（未知来源）[na：1.8.0_45]在java.util.concurrent.ThreadPoolExecutor $ Worker.run（未知源）[na：1.8.0_45]在org.apache.tomcat.util.threads.TaskThread $ WrappingRunnable.run（TaskThread.java:61）[tomcat-embed-core-8.5.29.jar：8.5.29]在java.lang.Thread.run（未知来源）[na：1.8.0_45]
根据您先前的问题：How to enter a timestamp in Vaadin 8我假设您在[
获得NPE
Result<Timestamp> rs = Result.ok(Timestamp.valueOf(value));
这是期望的，如果传递的value为空JavaDocs: Timestamp valueOf。您应该在此处添加适当的null检查，然后再继续执行此操作