我是Spring框架的新手。我正在尝试使用RESTClient（application / json）发布JSON数据。但是我收到以下错误。 （春季版3.2）
错误：
2015-01-20 13:16:55,996 INFO [com.***.ui.restcontroller.PermissionGroup.PermissionGroupController] ADD PERMISSIONGROUP
2015-01-20 13:16:56,002 INFO [STDOUT] Hibernate: select tnmaxid0_.ENTITY_TYPE as ENTITY1_149_0_, tnmaxid0_.MAX_ID as MAX2_149_0_ from tagnos.tn_max_id tnmaxid0_ where tnmaxid0_.ENTITY_TYPE=?
2015-01-20 13:16:56,003 INFO [STDOUT] Hibernate: update tagnos.tn_max_id set MAX_ID=? where ENTITY_TYPE=?
2015-01-20 13:16:56,061 ERROR [org.jboss.ejb.plugins.LogInterceptor] RuntimeException in method: public abstract com.***.db.TnPermissionGroup com.***.ejb.UserManagerLocal.addPermissionGroup(com.***.db.TnPermissionGroup) throws java.lang.Exception:
java.lang.ClassCastException: java.util.LinkedHashMap cannot be cast to com.***.db.TnPermission
at com.***.ejb.UserManagerEJB.addPermissionGroup(UserManagerEJB.java:521)
at com.***.ejb.UserManagerEJB.addPermissionGroup(UserManagerEJB.java:495)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:622)
at org.jboss.invocation.Invocation.performCall(Invocation.java:359)
at org.jboss.ejb.StatelessSessionContainer$ContainerInterceptor.invoke(StatelessSessionContainer.java:237)
at org.jboss.resource.connectionmanager.CachedConnectionInterceptor.invoke(CachedConnectionInterceptor.java:158)
at org.jboss.ejb.plugins.StatelessSessionInstanceInterceptor.invoke(StatelessSessionInstanceInterceptor.java:169)
at org.jboss.ejb.plugins.CallValidationInterceptor.invoke(CallValidationInterceptor.java:63)
at org.jboss.ejb.plugins.AbstractTxInterceptor.invokeNext(AbstractTxInterceptor.java:121)
at org.jboss.ejb.plugins.TxInterceptorCMT.runWithTransactions(TxInterceptorCMT.java:350)
at org.jboss.ejb.plugins.TxInterceptorCMT.invoke(TxInterceptorCMT.java:181)
at org.jboss.ejb.plugins.SecurityInterceptor.invoke(SecurityInterceptor.java:168)
at org.jboss.ejb.plugins.LogInterceptor.invoke(LogInterceptor.java:205)
at org.jboss.ejb.plugins.ProxyFactoryFinderInterceptor.invoke(ProxyFactoryFinderInterceptor.java:138)
at org.jboss.ejb.SessionContainer.internalInvoke(SessionContainer.java:648)
at org.jboss.ejb.Container.invoke(Container.java:960)
at org.jboss.ejb.plugins.local.BaseLocalProxyFactory.invoke(BaseLocalProxyFactory.java:430)
at org.jboss.ejb.plugins.local.StatelessSessionProxy.invoke(StatelessSessionProxy.java:103)
at com.sun.proxy.$Proxy300.addPermissionGroup(Unknown Source)
at com.***.business.UserManagerDelegate.addPermissionGroup(UserManagerDelegate.java:236)
at com.***.ui.restcontroller.PermissionGroup.PermissionGroupController.addPermissionGroup(PermissionGroupController.java:125)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:622)
at org.springframework.web.method.support.InvocableHandlerMethod.invoke(InvocableHandlerMethod.java:219)
at org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:132)
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:745)
at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:686)
at org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:80)
at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:925)
at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:856)
at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:920)
at org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:827)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:710)
at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:801)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:803)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at org.jboss.web.tomcat.filters.ReplyHeaderFilter.doFilter(ReplyHeaderFilter.java:96)
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:230)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:175)
at org.jboss.web.tomcat.security.SecurityAssociationValve.invoke(SecurityAssociationValve.java:179)
at org.jboss.web.tomcat.security.JaccContextValve.invoke(JaccContextValve.java:84)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:128)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:104)
at org.jboss.web.tomcat.service.jca.CachedConnectionValve.invoke(CachedConnectionValve.java:157)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:241)
at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:844)
at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:580)
at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:447)
at java.lang.Thread.run(Thread.java:701)
JSON格式：
{
"name":"Test",
"tnPermissions":[
{
"comp_id":{
"permGroupId":"2",
"functionId":"100",
"operationType":"5"
},
"allow":"1"
}
]
}
Controller.java
/**************** ADD PERMISSIONGROUP **********************/
@RequestMapping(method=RequestMethod.POST,consumes="application/json")
@ResponseStatus(HttpStatus.CREATED)
public @ResponseBody Object addPermissionGroup(@RequestBody PermissionGroupRequestCriteria permissiongroupRequestCriteria,BindingResult bindingResult) throws Exception{
TnPermissionGroup grp = null;
try{
permissiongroupValidator.validate(permissiongroupRequestCriteria, bindingResult);
if(bindingResult.hasErrors())
{
Map<String,String> fieldErrorMap = new HashMap<String,String>();
for(FieldError fieldError : bindingResult.getFieldErrors())
{
fieldErrorMap.put(fieldError.getField(), fieldError.getDefaultMessage());
}
String localizedErrorMessage = messageSource.getMessage("permissiongroup.insert.unsuccessful", null, currentLocale);
ErrorResponse resp =new ErrorResponse(localizedErrorMessage);
resp.setErrorMessages(fieldErrorMap);
return new ResponseEntity<ErrorResponse>(resp,HttpStatus.BAD_REQUEST);
}
grp = new TnPermissionGroup(permissiongroupRequestCriteria.getPermGroupId(),permissiongroupRequestCriteria.getName(),permissiongroupRequestCriteria.getDescription(),permissiongroupRequestCriteria.getTnPermissions());
grp = userDelegate.addPermissionGroup(grp);
} catch(Exception e){
String localizedErrorMessage = messageSource.getMessage("permissiongroup.insert.unsuccessful", null, currentLocale);
ErrorResponse resp = new ErrorResponse(localizedErrorMessage);
return new ResponseEntity<ErrorResponse>(resp,HttpStatus.BAD_REQUEST);
}
argumentsToReplace[0]= grp.getName();
String localizedErrorMessage = messageSource.getMessage("permissiongroup.insert.successful", argumentsToReplace, currentLocale);
EmptySuccessResponse resp = new EmptySuccessResponse(localizedErrorMessage);
resp.setResource(grp);
return new ResponseEntity<EmptySuccessResponse>(resp, HttpStatus.CREATED);
}
TnPermissionGroup.java
public class TnPermissionGroup implements Serializable {
private Integer permGroupId;
private String name;
private String description;
private Set tnPermissions;
public TnPermissionGroup() {
}
public TnPermissionGroup(Integer permGroupId, String name, Set tnPermissions) {
this.permGroupId = permGroupId;
this.name = name;
this.tnPermissions = tnPermissions;
}
/** full constructor */
public TnPermissionGroup(Integer permGroupId, String name, String description, Set tnPermissions) {
this.permGroupId = permGroupId;
this.name = name;
this.description = description;
this.tnPermissions = tnPermissions;
}
public Integer getPermGroupId() {
return this.permGroupId;
}
public void setPermGroupId(Integer permGroupId) {
this.permGroupId = permGroupId;
}
public String getName() {
return this.name;
}
public void setName(String name) {
this.name = name;
}
public String getDescription() {
return this.description;
}
public void setDescription(String description) {
this.description = description;
}
public Set getTnPermissions() {
return this.tnPermissions;
}
public void setTnPermissions(Set tnPermissions) {
this.tnPermissions = tnPermissions;
}
public void addPermission(TnPermission perm)
{
if (tnPermissions == null) {
tnPermissions = new HashSet();
}
tnPermissions.add(perm);
}
}
TnPermission.java
public class TnPermission implements Serializable {
private com.***.db.TnPermissionPK comp_id;
private Byte allow;
/** full constructor */
public TnPermission(com.***.db.TnPermissionPK comp_id, Byte allow) {
this.comp_id = comp_id;
this.allow = allow;
}
/** default constructor */
public TnPermission() {
}
/** minimal constructor */
public TnPermission(com.***.db.TnPermissionPK comp_id) {
this.comp_id = comp_id;
}
public com.***.db.TnPermissionPK getComp_id() {
return this.comp_id;
}
public void setComp_id(com.***.db.TnPermissionPK comp_id) {
this.comp_id = comp_id;
}
public Byte getAllow() {
return this.allow;
}
public void setAllow(Byte allow) {
this.allow = allow;
}
}
TnPermissionPK.java
public class TnPermissionPK implements Serializable {
private Integer permGroupId;
private Integer functionId;
private Integer operationType;
/** full constructor */
public TnPermissionPK(Integer permGroupId, Integer functionId, Integer operationType) {
this.permGroupId = permGroupId;
this.functionId = functionId;
this.operationType = operationType;
}
/** default constructor */
public TnPermissionPK() {
}
public Integer getPermGroupId() {
return this.permGroupId;
}
public void setPermGroupId(Integer permGroupId) {
this.permGroupId = permGroupId;
}
public Integer getFunctionId() {
return this.functionId;
}
public void setFunctionId(Integer functionId) {
this.functionId = functionId;
}
public Integer getOperationType() {
return this.operationType;
}
public void setOperationType(Integer operationType) {
this.operationType = operationType;
}
}
为什么JSON数据POST没有解析。我认为JSON格式是错误的。 请帮帮我。
答案 0 :(得分：0)
为什么不接受json作为服务方法的字符串输入，然后使用Jackson或Gson将它们解析为java对象（在您的情况下为PermissionGroupRequestCriteria），这样您就能够处理将错误的json传递给服务时的条件。