在Spring Hibernate中使用@ModelAttribute
[英]Using @ModelAttribute in spring hibernate
问题描述
Getting error while using @ModelAttribute, tried many of the solutions but could not find any answers 
使用@ModelAttribute时出错，尝试了许多解决方案，但找不到任何答案
My controller is 我的控制器是
@RequestMapping(value = "/user", params = "add", method = RequestMethod.POST)
public String postAddUser(
@RequestParam("name") String name,
@RequestParam("role") Role role,
@RequestParam("email_address") String emailAddress
) {
System.out.println("Inside postAddUser");
User user = new User(name, role,emailAddress);
user = userRepository.save(user);
return "redirect:user?id=" + user.getId();
}
My view page is: 我的查看页面是：
<title>Add User</title>
</head>
<body>
<div class="container">
<div class="row">
<div class="col-md-12">
<div class="col-md-4">
<h2>Add User</h2>
<form action="user" method="post" role="form">
<div class="form-group ">
<label for="user">User Name:</label>
<input type="text"
class="form-control" name="name" id="name"
placeholder="Enter User Name" required>
</div>
<div class="form-group">
<label for="email">Email Address:</label> <input type="email"
name="email_address" class="form-control" id="email"
placeholder="Enter email Address" required>
</div>
<div class="form-group">
<label for="role">Role:</label>
<select name="role"
class="form-control" id="role" placeholder="Enter Role" required>
<option disabled selected></option>
<c:forEach var="role" items="${roles}">
<option value="${role.value}">${role.name}</option>
</c:forEach>
</select>
</div>
<button type="submit" value="Submit" name="add"
class="btn btn-info active">Submit</button>
<a href="adminHome" class="btn btn-info" role="button">Back</a>
</form>
</div>
<div class="col-md-4">
<div class="col-md-4"></div>
</div>
</div>
</div>
</div>
</body>
User Bean 用户Bean
@Entity
@Table(name="USER")
public class User extends BaseEntity{
@Column(name="NAME")
private String name;
@Column(name="ROLE")
private Role role;
@Column(name = "EMAIL_ADDRESS", nullable = false)
private String emailAddress;
public User(){}
public User(String name, Role role, String emailAddress) {
super();
this.name = name;
this.role = role;
this.emailAddress = emailAddress;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public Role getRole() {
return role;
}
public void setRole(Role role) {
this.role = role;
}
public String getEmailAddress() {
return emailAddress;
}
public void setEmailAddress(String emailAddress) {
this.emailAddress = emailAddress;
}
}
I tried using @ModelAttribute in my controller but somehow value for email is null in when it comes to controller side. 我尝试在控制器中使用@ModelAttribute，但在控制器方面，电子邮件的值某种程度上为空。
Below is code for same after changing my code to fit @ModelAttribute. 下面是更改我的代码以适合@ModelAttribute后的相同代码。
Controller side. 控制器端。
@RequestMapping(value = "/user", params = "add", method = RequestMethod.POST)
public String postAddUser(@ModelAttribute("user")User user) {
System.out.println("Inside postAddUser");
System.out.println(user.getId());
System.out.println(user.getEmailAddress());
System.out.println(user.getName());
System.out.println(user.getRole());
user = userRepository.save(user);
return "redirect:user?id=" + user.getId();
}
View page 查看页面
<title>Add User</title>
</head>
<body>
<div class="container">
<div class="row">
<div class="col-md-12">
<div class="col-md-4">
<h2>Add User</h2>
<form action="user" method="post" role="form">
<div class="form-group ">
<label for="user">User Name:</label>
<input type="text"
class="form-control" name="name" id="name"
placeholder="Enter User Name" value="${user.name}" required>
</div>
<div class="form-group">
<label for="email">Email Address:</label> <input type="email"
name="email_address" class="form-control" id="email"
placeholder="Enter email Address" value="${user.emailAddress}" value="${role.value}" required>
</div>
<div class="form-group">
<label for="role">Role:</label>
<select name="role"
class="form-control" id="role" placeholder="Enter Role" required>
<option disabled selected></option>
<c:forEach var="role" items="${roles}">
<option value="${role.value}">${role.name}</option>
</c:forEach>
</select>
</div>
<button type="submit" value="Submit" name="add"
class="btn btn-info active">Submit</button>
<a href="adminHome" class="btn btn-info" role="button">Back</a>
</form>
</div>
<div class="col-md-4">
<div class="col-md-4"></div>
</div>
</div>
</div>
</div>
</body>
Below is the error I am getting 以下是我得到的错误
Inside postAddUser
0
null
Harding Berg
HEAD_OF_DEPARTMENT
Mar 10, 2016 2:49:33 PM org.apache.catalina.core.StandardWrapperValve invoke
SEVERE: Servlet.service() for servlet spring threw exception
org.hsqldb.HsqlException: integrity constraint violation: NOT NULL check constraint; SYS_CT_10097 table: USER column:
EMAIL_ADDRESS
at org.hsqldb.error.Error.error(Unknown Source)
at org.hsqldb.Table.enforceRowConstraints(Unknown Source)
at org.hsqldb.Table.insertSingleRow(Unknown Source)
at org.hsqldb.StatementDML.insertRowSet(Unknown Source)
at org.hsqldb.StatementInsert.getResult(Unknown Source)
at org.hsqldb.StatementDMQL.execute(Unknown Source)
at org.hsqldb.Session.executeCompiledStatement(Unknown Source)
at org.hsqldb.Session.execute(Unknown Source)
at org.hsqldb.jdbc.JDBCPreparedStatement.fetchResult(Unknown Source)
at org.hsqldb.jdbc.JDBCPreparedStatement.executeUpdate(Unknown Source)
at com.jolbox.bonecp.PreparedStatementHandle.executeUpdate(PreparedStatementHandle.java:203)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:497)
at org.hibernate.engine.jdbc.internal.proxy.AbstractStatementProxyHandler.continueInvocation(AbstractStatementProxyHa
ndler.java:122)
at org.hibernate.engine.jdbc.internal.proxy.AbstractProxyHandler.invoke(AbstractProxyHandler.java:81)
at com.sun.proxy.$Proxy58.executeUpdate(Unknown Source)
at org.hibernate.id.IdentityGenerator$GetGeneratedKeysDelegate.executeAndExtract(IdentityGenerator.java:96)
at org.hibernate.id.insert.AbstractReturningDelegate.performInsert(AbstractReturningDelegate.java:58)
at org.hibernate.persister.entity.AbstractEntityPersister.insert(AbstractEntityPersister.java:2870)
at org.hibernate.persister.entity.AbstractEntityPersister.insert(AbstractEntityPersister.java:3381)
at org.hibernate.action.internal.EntityIdentityInsertAction.execute(EntityIdentityInsertAction.java:81)
at org.hibernate.engine.spi.ActionQueue.execute(ActionQueue.java:362)
at org.hibernate.engine.spi.ActionQueue.addResolvedEntityInsertAction(ActionQueue.java:203)
at org.hibernate.engine.spi.ActionQueue.addInsertAction(ActionQueue.java:183)
at org.hibernate.engine.spi.ActionQueue.addAction(ActionQueue.java:167)
at org.hibernate.event.internal.AbstractSaveEventListener.addInsertAction(AbstractSaveEventListener.java:320)
at org.hibernate.event.internal.AbstractSaveEventListener.performSaveOrReplicate(AbstractSaveEventListener.java:287)
at org.hibernate.event.internal.AbstractSaveEventListener.performSave(AbstractSaveEventListener.java:193)
at org.hibernate.event.internal.AbstractSaveEventListener.saveWithGeneratedId(AbstractSaveEventListener.java:126)
at org.hibernate.ejb.event.EJB3MergeEventListener.saveWithGeneratedId(EJB3MergeEventListener.java:71)
at org.hibernate.event.internal.DefaultMergeEventListener.saveTransientEntity(DefaultMergeEventListener.java:236)
at org.hibernate.event.internal.DefaultMergeEventListener.entityIsTransient(DefaultMergeEventListener.java:216)
at org.hibernate.event.internal.DefaultMergeEventListener.onMerge(DefaultMergeEventListener.java:154)
at org.hibernate.event.internal.DefaultMergeEventListener.onMerge(DefaultMergeEventListener.java:76)
at org.hibernate.internal.SessionImpl.fireMerge(SessionImpl.java:900)
at org.hibernate.internal.SessionImpl.merge(SessionImpl.java:884)
at org.hibernate.internal.SessionImpl.merge(SessionImpl.java:888)
at org.hibernate.ejb.AbstractEntityManagerImpl.merge(AbstractEntityManagerImpl.java:879)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:497)
at org.springframework.orm.jpa.ExtendedEntityManagerCreator$ExtendedEntityManagerInvocationHandler.invoke(ExtendedEnt
ityManagerCreator.java:365)
at com.sun.proxy.$Proxy43.merge(Unknown Source)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:497)
at org.springframework.orm.jpa.SharedEntityManagerCreator$SharedEntityManagerInvocationHandler.invoke(SharedEntityMan
agerCreator.java:240)
at com.sun.proxy.$Proxy43.merge(Unknown Source)
at org.springframework.data.jpa.repository.support.SimpleJpaRepository.save(SimpleJpaRepository.java:329)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:497)
at org.springframework.data.repository.core.support.RepositoryFactorySupport$QueryExecutorMethodInterceptor.executeMe
thodOn(RepositoryFactorySupport.java:368)
at org.springframework.data.repository.core.support.RepositoryFactorySupport$QueryExecutorMethodInterceptor.invoke(Re
positoryFactorySupport.java:349)
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:172)
at org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:110)
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:172)
at org.springframework.dao.support.PersistenceExceptionTranslationInterceptor.invoke(PersistenceExceptionTranslationI
nterceptor.java:155)
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:172)
at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:202)
at com.sun.proxy.$Proxy51.save(Unknown Source)
at in.ac.jmi.controllers.AdminController.postAddUser(AdminController.java:87)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:497)
at org.springframework.web.method.support.InvocableHandlerMethod.invoke(InvocableHandlerMethod.java:213)
at org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:126)
at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocab
leHandlerMethod.java:96)
at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandlerMethod(RequestMapp
ingHandlerAdapter.java:617)
at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHa
ndlerAdapter.java:578)
at org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:8
0)
at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:923)
at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:852)
at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:882)
at org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:789)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:637)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at org.springframework.orm.jpa.support.OpenEntityManagerInViewFilter.doFilterInternal(OpenEntityManagerInViewFilter.j
ava:113)
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:76)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:233)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:298)
at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:857)
at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:588)
at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:489)
at java.lang.Thread.run(Thread.java:745)
3 个解决方案
解决方案1
2 已采纳 2016-03-10 10:04:57
You have problem with the bellow code : 您对以下代码有疑问：
<input type="email" name="email_address" class="form-control" id="email" placeholder="Enter email Address" value="${user.emailAddress} value="${role.value}" required>
You need to use the exact java object field name at your name attribute of input field to map it from view. 您需要在输入字段的name属性中使用确切的Java对象字段名称，以将其从视图映射。 So use emailAddress instead of email_address. 因此，请使用emailAddress而不是email_address。 I do not understand why you've used two value attributes! 我不明白您为什么要使用两个值属性！ Remove value="${role.value}". 删除value =“ $ {role.value}”。
Your code should look like this : 您的代码应如下所示：
<input type="email" name="emailAddress" class="form-control" id="email" placeholder="Enter email Address" value="${user.emailAddress} required>
As you are using spring you can also use spring tag library here. 当您使用spring时，您也可以在此处使用spring标签库。 If you use <form:input path="emailAddress"> it will automatically bind with user object field emailAddress and show the existing field value at form view. 如果使用<form:input path="emailAddress"> ，它将自动与用户对象字段emailAddress绑定，并在表单视图中显示现有字段值。
解决方案2
0 2016-03-10 09:39:34
Try to use @RequestBody 尝试使用@RequestBody
@RequestMapping(value = "/user", params = "add", method = RequestMethod.POST)
public String postAddUser@RequestBody User user) {
解决方案3
0 2016-03-10 09:53:09
If you dont want the email adress to be null use the rignte name liek this 如果您不希望电子邮件地址为空，请使用rignte名称liek this
<input type="email" name="emailAddress" class="form-control" id="email" placeholder="Enter email Address" value="${user.emailAddress}" value="${role.value}" required>
I suggest you to use the 我建议您使用
<form:*>
tag lib to generate your html 标记lib以生成您的html
About the @ModelAttribute : 关于@ModelAttribute：
You should also create a method @ModelAttribute("user") otherwise using it only on a parameter of method is useless. 您还应该创建一个方法@ModelAttribute（“ user”），否则仅在方法的参数上使用它是没有用的。
声明:本站的技术帖子网页，遵循CC BY-SA 4.0协议，如果您需要转载，请注明本站网址或者原文地址。任何问题请咨询:yoyou2525@163.com.
相关问题
Spring MVC Hibernate使用以下方法添加两个ModelAttribute <form:hidden> - Spring MVC Hibernate add two ModelAttribute's using <form:hidden>
在Spring项目中使用@ModelAttribute时出现SpringInputGeneralFieldAttrProcessor错误 - Error SpringInputGeneralFieldAttrProcessor when using @ModelAttribute in Spring project
春季：在ModelAttribute内部使用GET参数 - Spring: Using GET parameters inside of a ModelAttribute
Spring MVC表单使用modelAttribute提交 - Spring MVC form submit using modelAttribute
使用@ResourceMapping和@ModelAttribute在Spring Portlet Controller中访问RequestBody - Access RequestBody inside Spring Portlet Controller using @ResourceMapping and @ModelAttribute
在Spring框架上使用@ModelAttribute（“ myobject”）访问服务器上的JSON - Accessing JSON on server using @ModelAttribute(“myobject”) on spring framework
Spring MVC @ModelAttribute 似乎是异步行为（使用 jpa）并且需要它是同步的 - Spring MVC @ModelAttribute seems to behave asynchronously (using jpa) and need it to be synchronous
为什么在 Spring MVC 3.0 中使用 @ModelAttribute 'update()' 不重定向到 'sox'？ - Why does 'update()' not redirect to 'sox' using @ModelAttribute in Spring MVC 3.0?
Spring MVC注释@ModelAttribute - Spring MVC annotation @ModelAttribute
Spring MVC中的不同@ModelAttribute - Different @ModelAttribute in spring mvc
相关标签