我使用angular-js / spring boot / sprint数据/休息启动个人项目
我在数据库中保存实体对象时遇到了问题
@Entity
@Table(name="CUSTOMER")
public class Customer {
@Id
@GeneratedValue(strategy = GenerationType.AUTO)
@Column(name="CUSTOMER_ID")
private int customerId;
@Column(name="NAME")
private String name;
@Column(name="PHONE_NUMBER")
private String phoneNumber;
@Column(name="POSTAL_ADDRESS")
private String postalAddress;
@Column(name="CITY")
private String city;
@Column(name="COUNTRY")
private String country;
@Column(name="EMAIL")
private String email;
@OneToMany(mappedBy="customer")
@OrderBy("name ASC")
private List<Contact> contacts;
@ManyToOne
@JoinColumn(name = "STATUS_ID")
private RefStatus status;
RefStatus.java
@Entity
@Table(name="REF_STATUS")
public class RefStatus {
@Id
@Column(name="STATUS_ID")
private int statusId;
@Column(name="CODE")
private String code;
@Column(name="DESCRIPTION")
private String description;
@Column(name="ACTIVE")
private Boolean active;
CrudRepository
@RepositoryRestResource(collectionResourceRel = "refstatus", path = "refstatus")
public interface RefStatusRepository extends CrudRepository<RefStatus, Integer> {
@Query("SELECT c FROM RefStatus c")
List<RefStatus> findAll();
}
app.js
$scope.addCustomer = function addCustomer() {
if($scope.name==""){
alert("Error");
}
else{
$http.post(urlBase + '/customers', {
name: $scope.name,
status : $scope.statusId
}).
success(function(data, status, headers) {
alert("Customer added");
var newTaskUri = headers()["location"];
});
}
};
html pages
<div ng-controller="taskManagerController">
<div id="add-task-panel" class="fadein fadeout addpanel panel">
<div class="panel-body">
<div class="task" >
<table class="add-task">
<tr>
<td>Customer Name:</td>
<td><input type="text" ng-model="name"/></td>
</tr>
<tr>
<td>Status:</td>
<td>
<select ng-model="statusId" ng-options="status.code for status in items.refstatus">
<option value="">-- Select --</option>
</select>
</td>
</tr>
<tr>
<td><br/><button ng-click="addCustomer()" class="btn-panel-big">Ajouter client 3</button></td>
</tr>
</table>
</div>
</div>
</div>
当我点击按钮＆＃34; addcustomer＆＃34;时，会引发此异常：
2015-01-02 23:17:53.033 ERROR 11108 --- [p-nio-8-exec-10] s.d.r.w.AbstractRepositoryRestController : Could not read JSON: (was java.lang.NullPointerException) (through reference chain: fr.stockmanagem
ent.Customer["status"]); nested exception is com.fasterxml.jackson.databind.JsonMappingException: (was java.lang.NullPointerException) (through reference chain: fr.stockmanagement.Customer["status"])
org.springframework.http.converter.HttpMessageNotReadableException: Could not read JSON: (was java.lang.NullPointerException) (through reference chain: fr.stockmanagement.Customer["status"]); nested e
xception is com.fasterxml.jackson.databind.JsonMappingException: (was java.lang.NullPointerException) (through reference chain: fr.stockmanagement.Customer["status"])
at org.springframework.http.converter.json.MappingJackson2HttpMessageConverter.readJavaType(MappingJacks on2HttpMessageConverter.java:228)
at org.springframework.http.converter.json.MappingJackson2HttpMessageConverter.readInternal(MappingJack son2HttpMessageConverter.java:212)
at org.springframework.http.converter.AbstractHttpMessageConverter.read(AbstractHttpMessageConverter.java:159)
at org.springframework.data.rest.webmvc.config.PersistentEntityResourceHandlerMethodArgumentResolver.resolveArgument(PersistentEntityResourceHandlerMethodArgumentResolver.java:100)
at org.springframework.web.method.support.HandlerMethodArgumentResolverComposite.resolveArgument(HandlerMethodArgumentResolverComposite.java:79)
at org.springframework.web.method.support.InvocableHandlerMethod.getMethodArgumentValues(InvocableHandlerMethod.java:157)
at org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:124)
at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:104)
at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandleMethod(RequestMappingHandlerAdapter.java:749)
at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:689)
at org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:83)
at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:938)
at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:870)
at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:961)
at org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:863)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:646)
at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:837)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:727)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:303)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
at org.springframework.web.filter.HiddenHttpMethodFilter.doFilterInternal(HiddenHttpMethodFilter.java:77)
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:220)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:122)
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:501)
at org.apache.catalina.valves.RemoteIpValve.invoke(RemoteIpValve.java:683)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:171)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:116)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:408)
at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1040)
at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:607)
at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1720)
at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.run(NioEndpoint.java:1679)
at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
at java.lang.Thread.run(Unknown Source)
Caused by: com.fasterxml.jackson.databind.JsonMappingException: (was java.lang.NullPointerException) (through reference chain: fr.stockmanagement.Customer["status"])
at com.fasterxml.jackson.databind.JsonMappingException.wrapWithPath(JsonMappingException.java:232)
at com.fasterxml.jackson.databind.JsonMappingException.wrapWithPath(JsonMappingException.java:197)
at com.fasterxml.jackson.databind.deser.BeanDeserializerBase.wrapAndThrow(BeanDeserializerBase.java:1420)
at com.fasterxml.jackson.databind.deser.BeanDeserializer.vanillaDeserialize(BeanDeserializer.java:244)
at com.fasterxml.jackson.databind.deser.BeanDeserializer.deserialize(BeanDeserializer.java:118)
at com.fasterxml.jackson.databind.ObjectMapper._readMapAndClose(ObjectMapper.java:2993)
at com.fasterxml.jackson.databind.ObjectMapper.readValue(ObjectMapper.java:2158)
at org.springframework.http.converter.json.MappingJackson2HttpMessageConverter.readJavaType(MappingJacks on2HttpMessageConverter.java:225)
... 39 common frames omitted
Caused by: java.lang.NullPointerException: null
at java.net.URI$Parser.parse(Unknown Source)
at java.net.URI.<init>(Unknown Source)
at java.net.URI.create(Unknown Source)
at org.springframework.data.rest.webmvc.json.PersistentEntityJackson2Module$UriStringDeserializer.deserialize(PersistentEntityJackson2Module.java:359)
at com.fasterxml.jackson.databind.deser.SettableBeanProperty.deserialize(SettableBeanProperty.java:525)
at com.fasterxml.jackson.databind.deser.impl.MethodProperty.deserializeAndSet(MethodProperty.java:99)
at com.fasterxml.jackson.databind.deser.BeanDeserializer.vanillaDeserialize(BeanDeserializer.java:242)
... 43 common frames omitted
您知道如何保存包含对象的客户Customer（RefStatus）吗？
谢谢，
答案 0 :(得分：0)
我找到了解决方案。
我在Java中创建了一个控制器，从app.js输入所有属性。
@RequestMapping(value="/create/{name}/{status}",method = RequestMethod.POST,headers="Accept=application/json")
public Customer create(
@PathVariable String name,
@PathVariable String status){
Customer customer = new Customer();
customer.setName(name);
RefStatus refStatus = refStatusRepository.findByCode(status);
customer.setStatus(refStatus);
return this.customerRepository.save(customer);
}
我不知道它是否是最佳解决方案，但它运行良好：）