Обработка запроса не удалась; вложенным исключением является java.lang.NumberFormatException: для входной строки: "" ⇐ JAVA

[Anonymous]

org.springframework.web.util.NestedServletException: Request processing failed; nested exception is java.lang.NumberFormatException: For input string: ""

I'm trying to build a web app using only annotations, java, JSPs, spring data, spring mvc, and mongo db.

I've got things mostly working, however when I tried to create a JSP form with multi select lists, I'm getting the title error.

I'm trying to create an agent object and save it to the mongodb database. The multi select boxes are passing back string IDs for the objects that were selected. The agent object has lists that need to be populated with the multi select lists.

Here is the response data from chrome dev tools:

id: name:Test1 type:MOB attributeList[]:687a1964-4179-4631-832b-e23b34300840 personalityTraitList[]:8b321f3c-6398-4bc4-afc6-e6c7e4a6a3e3 skillList[]:53090226-0f54-4121-90c0-4d3a188aa5f8 triggerList[]:923048ef-7a4d-42e3-8691-2d2e9603e79b behaviorTreeList[]:84966b7a-fb53-4f64-be2a-203ae3743250 Here is the html for the first multi select box. They are all the same.

Here is the controller save request mapping:

@RequestMapping(value = "/AgentManager/save", method = RequestMethod.POST) public View createAgent(@ModelAttribute Agent agent, ModelMap model) { if(StringUtils.hasText(agent.getId())) { agentService.updateAgent(agent); } else { agentService.addAgent(agent); } return new RedirectView("/MotherNatureEmulator/AgentManager"); } The agent service will create a random UUID if the ID field is empty when going to save the agent.

Here is the stack trace:

java.lang.NumberFormatException: For input string: "" java.lang.NumberFormatException.forInputString(NumberFormatException.java:65) java.lang.Integer.parseInt(Integer.java:504) java.lang.Integer.parseInt(Integer.java:527) org.springframework.beans.BeanWrapperImpl.setPropertyValue(BeanWrapperImpl.java:969) org.springframework.beans.BeanWrapperImpl.setPropertyValue(BeanWrapperImpl.java:902) org.springframework.beans.AbstractPropertyAccessor.setPropertyValues(AbstractPropertyAccessor.java:75) org.springframework.validation.DataBinder.applyPropertyValues(DataBinder.java:740) org.springframework.validation.DataBinder.doBind(DataBinder.java:636) org.springframework.web.bind.WebDataBinder.doBind(WebDataBinder.java:191) org.springframework.web.bind.ServletRequestDataBinder.bind(ServletRequestDataBinder.java:112) org.springframework.web.servlet.mvc.method.annotation.ServletModelAttributeMethodProcessor.bindRequestParameters(ServletModelAttributeMethodProcessor.java:153) org.springframework.web.method.annotation.ModelAttributeMethodProcessor.resolveArgument(ModelAttributeMethodProcessor.java:106) org.springframework.web.method.support.HandlerMethodArgumentResolverComposite.resolveArgument(HandlerMethodArgumentResolverComposite.java:77) org.springframework.web.method.support.InvocableHandlerMethod.getMethodArgumentValues(InvocableHandlerMethod.java:162) org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:123) org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:104) org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandleMethod(RequestMappingHandlerAdapter.java:745) org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:686) org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:80) org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:925) org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:856) org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:936) org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:838) javax.servlet.http.HttpServlet.service(HttpServlet.java:647) org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:812) javax.servlet.http.HttpServlet.service(HttpServlet.java:728)

I tried creating a custom data binder, but that didn't help.

Could anyone direct me to the right way to do these things? This is the first time I'm trying to make a web app by myself.

Here is the Agent class:

@Document(collection = "AgentCollection") public class Agent { @Id private String _id; private String _name; private String _type; private ArrayList _actionList; private ArrayList _attributeList; private ArrayList _behaviorTreeList; private ArrayList _itemList; private ArrayList _personalityTraitList; private ArrayList _skillList; private ArrayList _triggerList; public String getId() { return _id; } public void setId(String id) { _id = id; } public String getName() { return _name; } public void setName(String name) { _name = name; } public String getType() { return _type; } public void setType(String type) { _type = type; } public ArrayList getAttributeList() { return _attributeList; } public void setAttributeList(final ArrayList attributeList) { _attributeList = attributeList; } public ArrayList getPresonalityTraitList() { return _personalityTraitList; } public void setPersonalityTraitList(final ArrayList personalityTraitList) { _personalityTraitList = personalityTraitList; } public ArrayList getSkillList() { return _skillList; } public void setSkillList(final ArrayList skillList) { _skillList = skillList; } public ArrayList getActionList() { return _actionList; } public void setActionList(final ArrayList actionList) { _actionList = actionList; } public ArrayList getTriggerList() { return _triggerList; } public void setTriggerList(final ArrayList triggerList) { _triggerList = triggerList; } public ArrayList getItemList() { return _itemList; } public void setItemList(final ArrayList itemList) { _itemList = itemList; } public ArrayList getBehaviorTreeList() { return _behaviorTreeList; } public void setBehaviorTreeList(final ArrayList behaviorTreeList) { _behaviorTreeList = behaviorTreeList; } } Thanks, Matt


Источник: https://stackoverflow.com/questions/198 ... texception