javabeans

问题 In this task I am not allowed to use auto-wiring so I am trying to create something similar to this: https://www.tutorialspoint.com/spring/spring_java_based_configuration.htm My code @Configuration public class ApplicationConfig { @Bean public FoodService foodService() { return new FoodService(FoodRepository()); } @Bean public FoodRepository foodRepository() { return new FoodRepository(); } } Of course since FoodRepository is an interface extending MongoRepository, it gives an error that it

问题 I am in the process of switching from a Windows box to Ubunutu and I want to run my own local instance of Tomcat 6. I have installed Tomcat 6 without any basic issues. When I try to deploy a .war file that I had running on the Tomcat 6 instance on my Windows box I am getting the following error.... Apr 26, 2010 3:30:27 PM org.apache.catalina.core.ApplicationContext log INFO: Initializing Spring root WebApplicationContext Apr 26, 2010 3:30:27 PM org.apache.catalina.core.StandardContext

问题 In my project there are several @repositories , @Services, @Controllers My question is for the other 99% of the classes: Should i declare them as beans as well? pros\cons? thanks.. 回答1: Beans are a way of wiring together the larger components of an application. Not every object or class is a large component. Consider the String class, for example. So the answer is no . 来源： https://stackoverflow.com/questions/16657168/spring-should-every-class-in-my-project-be-a-bean

问题 This might sound like a dumb or a simple question, but I really have little to no experience with clustering of any kind and I'm just curious if and how a certain scenario is possible. Let's say I've set up a cluster of N Tomcat instances, and I've deployed my application App1 across all N instances. What would I need to do to be able to have certain beans in the application - not all, but some - be "shared" across the cluster? i.e., if I had a bean for WebsiteSettings , I'd like to have some

问题 This is relevant to one asked in Pass Parameter to Instance of @Inject Bean but i need some different approach for my implemenation. For passing parameter while injecting, a custom qualifier can be created like : @Qualifier @Target({ TYPE, METHOD, PARAMETER, FIELD }) @Retention(RUNTIME) @Documented public @interface SendInject{ @Nonbinding int value() default 0; // int value will be store here } The class to be injected need to be annotated with @SendInject as: @SendInject public class

问题 Is it possible to decode java objects in python? I know the structure of the java class that returns the data. The data is returned with the header of 'Transfer-Encoding: chunked' Or do I need to get the return data sent as xml / json? This is an example of the response I get; (Note some of the control characters are removed by pasting) -- response -- 200 OK Server: Apache-Coyote/1.1 Transfer-Encoding: chunked Date: Tue, 22 Nov 2011 13:24:41 GMT ��srjava.util.ArrayListx����a�IsizexpGwXsr,com

问题 I'm trying to write a code where a csv content is converted to a bean. This is how my code looks like final String TEMPLATE_FILE="addresses.csv"; CSVReader template = new CSVReader(new FileReader(TEMPLATE_FILE)); String [] header = template.readNext(); ColumnPositionMappingStrategy strat = new ColumnPositionMappingStrategy(); strat.setType(PersonEx.class); strat.setColumnMapping(header); CsvToBean csv = new CsvToBean(); List list = csv.parse(strat, template); In here if a particular attribute

问题 When I want to invoke a method with @PostConstruct, the method is not invoked. I don't get any errors or logs from the server. Do I have to add some configuration xml files or add additional annotations to invoke the method? Serlvet: public class PersonServlet extends HttpServlet { private static final long serialVersionUID = 1L; private static final Logger LOG = LoggerFactory.getLogger(PersonServlet.class); @EJB Storage storage; protected void service(final HttpServletRequest req, final

问题 I want to handle a login scenario as follows: Client connects to a Stateless Java Bean (SLJB) and tries to login; If login succeeds, the SLJB returns to the user a Stateful Java Bean (SFJB), so that the client can continue using the application. I am currently doing the second step as: return new StatefulBean(some params); Is this the right way to do it? It does not seem to me as I get the exception: Class org.eclipse.persistence.internal.jpa.EntityManagerImpl is not Serializable when running

问题 I'm using spring security in my spring boot app to provide user functionality. I've spent quiet some time searching for an answer to the problem, but did only find solutions for people using xml-based configurations. My set-up is very similar to this: http://www.baeldung.com/spring-security-track-logged-in-users (alternative method at the bottom). This is my SecurityConfiguration: @Override protected void configure(HttpSecurity http) throws Exception { http.formLogin().defaultSuccessUrl("