java-ee

问题 I have two tables: Company and Automotive. A company can have many automotives. I am unable to persist an Automotive properly. Company is selected in View page from a drop down. My Controller @RequestMapping("/") public String view(ModelMap model) { Map<String, String> companyList = new HashMap<String, String>(); List<Company> companies = companyService.listAllCompanies(); for (Company company : companies) { companyList.put(String.valueOf(company.getId()), company.getName()); } model

问题 Closed . This question needs to be more focused. It is not currently accepting answers. Want to improve this question? Update the question so it focuses on one problem only by editing this post. Closed 5 years ago . As we define view,controller,service and Dao layer in application then how data flow in between them. e.g. suppose we add struts,spring,hibernate,etc. jars in project then how they work together? 回答1: The MVC pattern itself does not describe how should you implement your web

问题 I don't know why I received the error : org.apache.cayenne.CayenneRuntimeException: [v.4.0.M5 Feb 24 2017 07:47:55] Commit Exception [...] Caused by: java.sql.SQLException: Procédure stockée 'auto_pk_for_table' introuvable. [...] I'm using Cayenne : <dependency> <groupId>org.apache.cayenne</groupId> <artifactId>cayenne-server</artifactId> <version>4.0.M5</version> </dependency> and JDTS for sql server : <dependency> <groupId>net.sourceforge.jtds</groupId> <artifactId>jtds</artifactId>

问题 I'm retrieving a JSON string from an API using a RESTEasy client. The JSON payload looks something like this: { "foo1" : "", "foo2" : "", "_bar" : { "items" : [ { "id" : 1 , "name" : "foo", "foo" : "bar" }, { "id" : 2 , "name" : "foo", "foo" : "bar" }, { "id" : 3 , "name" : "foo", "foo" : "bar" }, { "id" : 4 , "name" : "foo", "foo" : "bar" } ] } } Now I'd like to extract only the items node for object mapping. What is the best way to intercept the JSON response body and modify it to have

问题 I’m trying to run/setup a simple Spring MVC 3 + Hibernate + Apache Tomcat 7.0, using NetBeans 7.1 as a development environment. Netbeans comes with prepackaged Spring and Hibernate files/jars/dependecies already setup in the right directory structure. In order to setup the data source bean in applicationContext I had 2 choices Variation #1 (using data source class=”org.springframework.jdbc.datasource.DriverManagerDataSource” which was prepackaged data source with NetBeans for Spring

问题 I'm using JPA with Java EE 5 (IBM RAD 7.5 and WebSphere 7). I've simplified my problem to the following example ... I have a Project and a User. The tables look like this: PROJECT -- id name projectmanagerid // is a User USER -- id username My classes look like this: @Entity @Table(name="PROJECT") class Project @Id @GeneratedValue(...) Long id; String name; @ManyToOne(fetch=FetchType.EAGER) @JoinColumn(name="projectmanagerid"); User projectManager; @Entity @Table(name="USER") class User @Id

问题 I'm trying to use plain old java objects(POJO)'s and regular class files where needed and only use EJBs when I need the functionality that they add such as asynchronous calls, pooling, etc. I'm wondering how the server treats this behavior once the project is deployed on a server. Since it is not managed by the container does a new instance have to be created for every stateless session bean pooled that might call one of it's methods? How do things like static methods or state affect this

问题 I am running my GWT application in development mode. In my client side code (Classes that implements Entrypoint), I have created one object and assigned it to a static variable of another class (Suppose Class A). Now, expectedly I can access the object by he reference of the static variable of class A from anywhere from the client side but can't access it from the server side code. Can anybody explain me why I can't access the object the same way I accessed it from client side code as both

问题 Hi im having while im trying to create a web application and i want to call the WSO2 identity server API RemoteUserStoreManagerService The error is this java.lang.NoSuchMethodError: org.wso2.carbon.um.ws.api.stub.RemoteUserStoreManagerServiceStub.addAnonymousOperations()V org.wso2.carbon.um.ws.api.stub.RemoteUserStoreManagerServiceStub.populateAxisService(RemoteUserStoreManagerServiceStub.java:42) org.wso2.carbon.um.ws.api.stub.RemoteUserStoreManagerServiceStub.<init>

问题 I am converting a regular J2EE application to use Maven. I was able to successfully convert to Maven and I am getting successful "mvn deploy". The issue is facing after deploying the ear to WAS. I am getting SRVE0203E :Servlet [action] org.apache.struts.action.ActionServlet is missing another required class. I had similar problems for different application and after trying couple of "exclusion" of jars I was able to deploy the application successfully in WAS. I have following question. How