我现在返回Login Objects。
private void checkLogin（）{ formmit（）; 登录newUser = new Login（）; newUser = ilogin.authenticate（loginbean）; System.out.println（它的空值+ newUser）; if（newUser == null）{ getWindow（）。showNotification（Login failed，LOGIN_ERROR_MSG， Notification.TYPE_WARNING_MESSAGE）; } else { System.out.println（newUser）; getApplication（）。setUser（newUser）; $ / code $ / pre 当没有匹配的电子邮件时，没有这样的用户，也没有打印出这个声明。 System.out.println（它的空值+ newUser）;但是当有电子邮件和密码匹配。我得到奇怪的错误。
原因：java.lang.ClassCastException： java.lang.Integer不能转换为 com.intermedix .domain.Login $在com.vaadin.event.ListenerMethod.receiveEvent（ListenerMethod.java:507）b $ b。在com.vaadin.event.EventRouter.fireEvent（EventRouter.java:161）在com.vaadin.ui.AbstractComponent.fireEvent（AbstractComponent.java:1154） at com.vaadin.ui.Button.fireClick（Button.java:371） at com.vaadin.ui.Button .changeVariables（Button.java:193） at com.vaadin.terminal.gwt.server.AbstractCommunicationManager.handleVariables（AbstractCommunicationManager.java:1094） at com.vaadin.terminal.gwt.server.AbstractCommunicationManager .doHandleUidlRequest（AbstractCommunicationManager.java:590）在com.vaadin.terminal.gwt.server.CommunicationManager.handleUidlRequest（CommunicationManager.java:266）在com.vaadin.terminal.gwt.server.AbstractAppli在javax.servlet.http.HttpServlet.service cationServlet.service（AbstractApplicationServlet.java:476）（HttpServlet.java:820）在org.mortbay.jetty.servlet.ServletHolder.handle（ServletHolder。 Java的：511），美元，org.mortbay.jetty.servlet.ServletHandler.handle（ServletHandler.java:390 b $ b）在org.mortbay.jetty.security.SecurityHandler.handle（SecurityHandler.java:216）在org.mortbay.jetty.servlet.SessionHandler.handle（SessionHandler.java:182） 在org.mortbay.jetty.handler.ContextHandler.handle（ContextHandler.java:765） at org.mortbay.jetty.webapp.WebAppContext.handle（WebAppContext.java:418） at org.mortbay.jetty.handler.ContextHandlerCollection.handle（ContextHandlerCollection.java:230） at org.mortbay .jetty.handler.HandlerCollection.handle（HandlerCollection.java:114） at org.mortbay.jetty.handler.HandlerWrapper.handle（HandlerWrapper.java:152） at o rg.mortbay.jetty.Server.handle（Server.java:326） at org.mortbay.jetty.HttpConnection.handleRequest（HttpConnection.java:542） at org.mortbay.jetty.HttpConnection $在org.mortbay.jetty.HttpParser.parseNext RequestHandler.content（HttpConnection.java:943）（HttpParser.java:756）在org.mortbay.jetty.HttpParser.parseAvailable（HttpParser.java： 218）。在org.mortbay.jetty.HttpConnection.handle（HttpConnection.java:404）在org.mortbay.io.nio.SelectChannelEndPoint.run（SelectChannelEndPoint.java:410 ）在org.mortbay.thread.QueuedThreadPool $ PoolThread.run（QueuedThreadPool.java:582）引起的： java.lang.ClassCastException： java.lang.Integer中不能被强制转换为 com.intermedix.domain.Login at com.intermedix.services.LoginService.authenticate（LoginService.java:31） at sun.reflect.NativeMethodAccessorImpl.invoke0（Native Method ）$ su n.reflect.NativeMethodAccessorImpl.invoke（NativeMethodAccessorImpl.java:39）在sun.reflect.DelegatingMethodAccessorImpl.invoke（DelegatingMethodAccessorImpl.java:25）在java.lang.reflect.Method.invoke（方法。的java：在org.springframework.aop.support.AopUtils.invokeJoinpointUsingReflection（AopUtils.java:301 597））。在org.springframework.aop.framework.ReflectiveMethodInvocation.invokeJoinpoint（ReflectiveMethodInvocation.java:182） at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed（ReflectiveMethodInvocation.java:149） at org.springframework.transaction.interceptor.TransactionInterceptor.invoke（TransactionInterceptor.java:106）在在在$ Proxy32 org.springframework.aop.framework.JdkDynamicAopProxy.invoke（JdkDynamicAopProxy.java:204） org.springframework.aop.framework.ReflectiveMethodInvocation.proceed（ReflectiveMethodInvocation.java:171）。 authe nticate（未知来源）。在com.intermedix.ui.LoginDailog.checkLogin（LoginDailog.java:106）。在com.intermedix.ui.LoginDailog.access $ 0（LoginDailog.java:102） at com.intermedix.ui.LoginDailog $ 1.buttonClick（LoginDailog.java:52） at sun.reflect.NativeMethodAccessorImpl.invoke0（Native Method） at sun.reflect.NativeMethodAccessorImpl .invoke（NativeMethodAccessorImpl.java:39） at sun.reflect.DelegatingMethodAccessorImpl.invoke（DelegatingMethodAccessorImpl.java:25） at java.lang.reflect.Method.invoke（Method.java:597） at com.vaadin.event.ListenerMethod.receiveEvent（ListenerMethod.java:487） ... 26 more
更新
我的Login Bean类
package com.intermedix.domain; import javax.persistence.Entity; import javax.persistence.GeneratedValue; import javax.persistence.GenerationType; import javax.persistence.Id; import javax.persistence.Table; @Entity @Table（name =users） public class Login { public Login（）{} $ b $ private long id = null ; 私人字符串电子邮件; 私人字符串密码; public Login（String email，String password） { this.email = email; this.password =密码; @Id @GeneratedValue（strategy = GenerationType.AUTO） public Long getId（）{ return id; } public void setId（Long id）{ this.id = id; } public String getPassword（）{ return password; } public void setPassword（String password）{ this.password = password; } public String getEmail（）{ return email; } public void setEmail（String email）{ this.email = email; $ b $ / code $ / pre $ b $ p我也根据raplh查询。解决方案根据您的问题 org.hibernate.hql.ast.QuerySyntaxException ，我强烈假设Login是一个映射对象。
在这种情况下，如果以正确的方式使用Hibernate，则不需要手动执行查询结果和对象之间的映射：
已更正（我忘记了查询的AS l部分）
列表结果= createQuery（ SELECT l FROM login AS l WHERE l.email =：email AND l.password =：password） .setParameter（email，login.getEmail（）） .setParameter（password 。，login.getPassword（））列表（）; if（results.isEmpty（））{ // .. login failed } else if（result.size（）> 1）{ throw new SomethingWrongException（） ; } else {登录登录=（Login）results.get（0）; }
Updating the entire post.
public Login authenticate(Login login) { String query = "SELECT 1 FROM Login AS l WHERE l.email=? AND l.password=?"; Object[] parameters = { login.getEmail(), login.getPassword() }; List resultsList = getHibernateTemplate().find(query,parameters); if ( resultsList.size() == 1 ) { results = (Login)resultsList.get(0); System.out.println(results); } else { System.out.println("Error dude.... "); // error no entity or mutiple entities } return results; }I now return Login Objects.
private void checkLogin() { formmit(); Login newUser = new Login(); newUser = ilogin.authenticate(loginbean); System.out.println("Its Null Value" + newUser); if (newUser == null) { getWindow().showNotification("Login failed", LOGIN_ERROR_MSG, Notification.TYPE_WARNING_MESSAGE); } else { System.out.println(newUser); getApplication().setUser(newUser); } }When there is no matching email, i get there is no such user and also this statement does get printed out. System.out.println("Its Null Value" + newUser);
But when there is a email and password matching. I get weird error.
Cause: java.lang.ClassCastException: java.lang.Integer cannot be cast to com.intermedix.domain.Login at com.vaadin.event.ListenerMethod.receiveEvent(ListenerMethod.java:507) at com.vaadin.event.EventRouter.fireEvent(EventRouter.java:161) at com.vaadin.ui.AbstractComponent.fireEvent(AbstractComponent.java:1154) at com.vaadin.ui.Button.fireClick(Button.java:371) at com.vaadin.ui.Button.changeVariables(Button.java:193) at com.vaadin.terminal.gwt.server.AbstractCommunicationManager.handleVariables(AbstractCommunicationManager.java:1094) at com.vaadin.terminal.gwt.server.AbstractCommunicationManager.doHandleUidlRequest(AbstractCommunicationManager.java:590) at com.vaadin.terminal.gwt.server.CommunicationManager.handleUidlRequest(CommunicationManager.java:266) at com.vaadin.terminal.gwt.server.AbstractApplicationServlet.service(AbstractApplicationServlet.java:476) at javax.servlet.http.HttpServlet.service(HttpServlet.java:820) at org.mortbay.jetty.servlet.ServletHolder.handle(ServletHolder.java:511) at org.mortbay.jetty.servlet.ServletHandler.handle(ServletHandler.java:390) at org.mortbay.jetty.security.SecurityHandler.handle(SecurityHandler.java:216) at org.mortbay.jetty.servlet.SessionHandler.handle(SessionHandler.java:182) at org.mortbay.jetty.handler.ContextHandler.handle(ContextHandler.java:765) at org.mortbay.jetty.webapp.WebAppContext.handle(WebAppContext.java:418) at org.mortbay.jetty.handler.ContextHandlerCollection.handle(ContextHandlerCollection.java:230) at org.mortbay.jetty.handler.HandlerCollection.handle(HandlerCollection.java:114) at org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:152) at org.mortbay.jetty.Server.handle(Server.java:326) at org.mortbay.jetty.HttpConnection.handleRequest(HttpConnection.java:542) at org.mortbay.jetty.HttpConnection$RequestHandler.content(HttpConnection.java:943) at org.mortbay.jetty.HttpParser.parseNext(HttpParser.java:756) at org.mortbay.jetty.HttpParser.parseAvailable(HttpParser.java:218) at org.mortbay.jetty.HttpConnection.handle(HttpConnection.java:404) at org.mortbay.io.nio.SelectChannelEndPoint.run(SelectChannelEndPoint.java:410) at org.mortbay.thread.QueuedThreadPool$PoolThread.run(QueuedThreadPool.java:582) Caused by: java.lang.ClassCastException: java.lang.Integer cannot be cast to com.intermedix.domain.Login at com.intermedix.services.LoginService.authenticate(LoginService.java:31) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) at java.lang.reflect.Method.invoke(Method.java:597) at org.springframework.aop.support.AopUtils.invokeJoinpointUsingReflection(AopUtils.java:301) at org.springframework.aop.framework.ReflectiveMethodInvocation.invokeJoinpoint(ReflectiveMethodInvocation.java:182) at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:149) at org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:106) at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:171) at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:204) at $Proxy32.authenticate(Unknown Source) at com.intermedix.ui.LoginDailog.checkLogin(LoginDailog.java:106) at com.intermedix.ui.LoginDailog.access$0(LoginDailog.java:102) at com.intermedix.ui.LoginDailog$1.buttonClick(LoginDailog.java:52) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) at java.lang.reflect.Method.invoke(Method.java:597) at com.vaadin.event.ListenerMethod.receiveEvent(ListenerMethod.java:487) ... 26 more
Updating
My Login bean class
package com.intermedix.domain; import javax.persistence.Entity; import javax.persistence.GeneratedValue; import javax.persistence.GenerationType; import javax.persistence.Id; import javax.persistence.Table; @Entity @Table(name="users") public class Login { public Login(){} private Long id = null; private String email; private String password; public Login(String email, String password) { this.email = email; this.password = password; } @Id @GeneratedValue(strategy=GenerationType.AUTO) public Long getId() { return id; } public void setId(Long id) { this.id = id; } public String getPassword() { return password; } public void setPassword(String password) { this.password = password; } public String getEmail() { return email; } public void setEmail(String email) { this.email = email; } }and also i updated according to raplh the query.
解决方案According to your question org.hibernate.hql.ast.QuerySyntaxException, I strongly assume that Login is a mapped object.
In this case you do not need to do the mapping between the query result and the object by hand, if you use Hibernate in the correct way:
corrected (i have forgot the "AS l" part of the query)
List results = createQuery( "SELECT l FROM login AS l WHERE l.email=:email AND l.password=:password") .setParameter("email",login.getEmail()) .setParameter("password",login.getPassword()).list(); if (results.isEmpty()) { //.. login failed } else if (result.size() > 1) { throw new SomethingWrongException(); } else { Login login = (Login) results.get(0); }
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错误：java.lang.ClassCastException
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