javabeans | 易学教程

Overriding property file using spring

阅读更多关于 Overriding property file using spring

问题 I have the following property file defined in one of my Spring (3.1) XMLs: <context:property-placeholder location="classpath:MyConfigFile.properties"/> I want to be able to define a second optional property file which will override the "MyConfigFile.properties" file and will get loaded instead of it. In Other words I want my application to load the "MyConfigFile.properties" file, but if a "StrogerConfigFile.properties" will be available at the classpath- it will get loaded instead. Anyone

h:selectOneMenu generic converter for all entities without calling DB again and again

阅读更多关于 h:selectOneMenu generic converter for all entities without calling DB again and again

I want to get selected object from <h:selectOneMenu> , but the problem is I couldn't find any generic converter for all type of entities. My first question is, is there a generic converter for all type of entities? I don't want to write another converter again for each other entity. My second question is, is there a way to get selected object without any converter? I don't want to call the DB again and again. I have a Car entity with id and name properties. BalusC My first question is, is there a generic converter for all type of entities? This does indeed not exist in standard JSF. The JSF

How to define private getter method in Groovy Bean?

阅读更多关于 How to define private getter method in Groovy Bean?

I used following code. class Bike{ def manufacturer; private getManufacturer(){ manufacturer } } But I was able invoke getter method from another class. tim_yates You can't using the private modifier. This is scheduled for Groovy 2.0 I believe Related questions: groovy call private method in Java super class Groovy Parent/Child Private Field Access Weirdness With Closure 来源： https://stackoverflow.com/questions/3819794/how-to-define-private-getter-method-in-groovy-bean

dynamically change spring beans

阅读更多关于 dynamically change spring beans

问题 how do I dynamically change the properties of a bean at runtime using java spring? I have a bean mainView, which should use as property "class" either "class1" or "class2". This decision should be made on base of an property-file, where the property "withSmartcard" is "Y" or "N". ApplicationContext: <bean id="mainView" class="mainView"> <property name="angebotsClient" ref="angebotsClient" /> <property name="class" ref="class1" /> </bean> <bean id="class1" class="class1"> <constructor-arg ref=

Convert String to Enum using Apache BeanUtils

阅读更多关于 Convert String to Enum using Apache BeanUtils

I've implemented a converter for Apache BeanUtils library for converting String to an enum constant: class EnumConverter implements Converter { @Override public <T> T convert(Class<T> tClass, Object o) { String enumValName = (String) o; Enum[] enumConstants = (Enum[]) tClass.getEnumConstants(); for (Enum enumConstant : enumConstants) { if (enumConstant.name().equals(enumValName)) { return (T) enumConstant; } } throw new ConversionException(String.format("Failed to convert %s value to %s class", enumValName, tClass.toString())); } } I use it in the following way: // Register my converter

What's the point of beans?

阅读更多关于 What's the point of beans?

I've bean doing some JSP tutorials and I don't understand what the point of a bean class is. All it is, is get and set methods. why do we use them? public class UserData { String username; String email; int age; public void setUsername( String value ) { username = value; } public void setEmail( String value ) { email = value; } public void setAge( int value ) { age = value; } public String getUsername() { return username; } public String getEmail() { return email; } public int getAge() { return age; } } and the jsp is <jsp:useBean id="user" class="user.UserData" scope="session"/> <HTML> <BODY>

Could not autowire. No beans of SimpMessagingTemplate type found

阅读更多关于 Could not autowire. No beans of SimpMessagingTemplate type found

问题 I am configuring Websockets in Spring basically by following the guide provided in the documentation. I am currently trying to send a message from the server to the client as explained in the section "Sending messages from anywhere" Following the example, you can Autowire a class called SimpMessagingTemplate @Controller public class GreetingController { private SimpMessagingTemplate template; @Autowired public GreetingController(SimpMessagingTemplate template) { this.template = template; }

Confused about naming of JavaBean properties, with respect to getters and setters

阅读更多关于 Confused about naming of JavaBean properties, with respect to getters and setters

I am making an application that uses Drools planner. The @ValueRangeFromSolutionProperty is supposed to refer to a property from another class ( NQueens in this case). From the JavaDocs for @ValueRangeFromSolutionProperty : propertyName The property name of which exists a getter on the Solution that returns a Collection. But I noticed an inconsistency : the annotator uses the property rowList from NQueens . But rowList (as opposed to RowList ) is a private variable (see snippets below). If it were supposed to infer a property by introspection (from it's getter and setter methods), shouldnt it

Executing the ActionListener of a (Primefaces) menu item leads to an IllegalStateException

阅读更多关于 Executing the ActionListener of a (Primefaces) menu item leads to an IllegalStateException

In JSF backed bean I got an IllegalStateException when the programmatically added action listener of a programmatically added Primefaces menu item is called. I tried both request and session scope but both are leading to the same error. Obviously there's need -- according to the stack trace -- to restore the view when an action listener is executed and I let my ToolbarBean implement Serializable with no different effect. What should I consider in order to get this to work? User interface definition <?xml version="1.0" encoding="UTF-8"?> <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional

Can an EJB bean implement multiple interfaces?

阅读更多关于 Can an EJB bean implement multiple interfaces?

Can an EJB bean implement multiple user defined interfaces, except business interfaces (@Local, @Remote) or No-Interface view (@LocalBean)? For example define two interfaces UserInterface1 , UserInterface2 , with no annotation. Is this legal to implement: @Stateless public class MyBean implements UserInterface1, UserInterface2 { ... Then I have another confusion: @Stateless public class MyBean implements Runnable { ... //inside I won't try to manage thread } Is this legal or illegal, I found that glassfish support this situation. The given example is illegal, but nevertheless accepted by quite