javabeans

问题 I have the following two classes. Can I say the first one is a POJO class and the second one as a Bean class? 1) POJO class, since it has only getter and setter method, and all the member are declared as private public class POJO { private int id; private String name; public int getId() { return id; } public String getName() { return name; } public void setId() { this.id = id; } public void setName() { this.name = name; } } 2) Bean class - all the member variables are private, has getters and

问题 This question already has an answer here : What is a NoSuchBeanDefinitionException and how do I fix it? (1 answer) Closed 3 years ago . I am getting the below exception when I am deploying the code Caused by: org.springframework.beans.factory.NoSuchBeanDefinitionException: No unique bean of type [com.belk.api.adapter.contract.Adapter] is defined: expected single matching bean but found 2: [endeca, solar] at org.springframework.beans.factory.support.DefaultListableBeanFactory

问题 Given I have a Spring bean configured as @Service("myService") public class DefaultService extends MyService { } and a class using this bean public class Consumer { @Autowired @Qualifier("myService") private MyService service; ... } I now want my project, that includes the preceding classes, to have Consumer another implementation of MyService being injected. Therefore I would like to overwrite the bean myService @Service("myService") public class SpecializedService implements MyService { }

问题 I see that some people use org.apache.commons.dbcp.BasicDataSource while other configurations have com.mchange.v2.c3p0.ComboPooledDataSource . Spring has its own: org.springframework.jdbc.datasource.DriverManagerDataSource There are probably even more. But which one is best? I have a JPA/Hibernate three tier application that needs connection pooling, but it looks like that all support this.... 回答1: Spring has its own: org.springframework.jdbc.datasource.DriverManagerDataSource The class org

问题 I created an xml context config, and also an annotation-based context configuration class,each creates a bean with same id, same class. so I thought that this would create a conflict because spring would say "can't find a unique instance of type ttt.TTT" (I have seen this error elsewhere). but surprisingly, the following code actually runs fine, and the bean chosen is the one from xml. if I cross out either of the bean definitions, it works fine too. so, why am I not getting a bean definition

问题 How to create bean/s(retaining column datatype in bean) dynamically after reading columns from table/s in java ? 回答1: UPDATE Previous answer was an attempt to solve the issue immediately. So it's not the final code for FlexBean. For the final code, visit https://github.com/ramazanpolat/flexbean OLD ANSWER I had the same problem so I wrote FlexBean. public class FlexBean { private List<String> propertyNames = new ArrayList<>(); private Map<String, Object> propertyValueMap = new LinkedHashMap<>

问题 I want to change the format of, Currently Date(YYYY-MM-DD) and Time (SS:MM:HH) to 'n' Months ago,'n' Days ago , 'n' Hours "ago" format. CURRENT FORMAT: REQUIRED FORMAT: I am using Bean and Adapter class to get Current Date. Code is given Below; Adapter Class : public class MessageAdapter extends BaseAdapter { private Activity activity; private List<MessageBean> messageBeanList; public ImageLoader imageLoader; private Context context; public MessageAdapter (Activity activity,List<MessageBean>

问题 I have a form which has 30 different fields. As passing them all to the controller need to have an attribute for each along with a pair of getter, setters. I am going to make the form fields as an object and send the object to the controller. I am using the following code * but some people suggest its a bad practice to call a java method from jsp and use JSTL instead, but do not know how to implement it using JSTL. Is there any other method to do it? * My JSP <s:form> code to implement form

问题 I am using Servlet and JSP without a framework to study for my SCWCD. I have a simple form that I want the parameters to bind to a bean automatically. Is this possible without writing binding code or using a framework? Thanks 回答1: No, it isn't. You should use some framework, which I guess would be an overkill. So what you can do, is iterate request.getParameterMap() keys and set the values to object with the corresponding field names (via reflection) 回答2: Well, without a "framework" you can't

问题 I'm going to pass a parameter from one page (Facelet) to a Managed Bean whose scope is View Scope. I try to do it like this: import javax.faces.bean.ManagedBean; import javax.faces.bean.ViewScoped; @ManagedBean @ViewScoped public class Mybean { private int id; public int getId() { return id; } public void setId(int id) { this.id = id; } } First page: <h:body> <h:form> <h:commandLink value="click" action="index"> <f:setPropertyActionListener target="#{mybean.id}" value="20"/> </h:commandLink>