javabeans

Easy way of populating Javabeans based on request parameters

由 孤街浪徒 提交于 2019-11-26 14:39:42
问题 I have a simple person class: package simpleApp.entities; public class Person { private String name; private String secondname; public void setSecondname(String cognome) { this.secondname = cognome; } public String getSecondname() { return secondname; } public void setName(String nome) { this.name = nome; } public String getName() { return name; } } and a simple html page: <html> <body> <form action="/simpleApp/person/" method="POST"> name: <input type="text" name="name"><br> second name:

JavaBean wrapping with JavaFX Properties

由 那年仲夏 提交于 2019-11-26 14:39:27
I want to use JavaFX properties for UI binding, but I don't want them in my model classes (see Using javafx.beans properties in model classes ). My model classes have getters and setters, and I want to create properties based on those. For example, assuming an instance bean with methods String getName() and setName(String name) , I would write SimpleStringProperty property = new SimpleStringProperty(bean, "name") expecting that property.set("Foobar") would trigger a call to bean.setName . But this doesn't seem to work. What am I missing? James_D The Simple*Property classes are full, standalone

find out the differences between two java beans for version tracking

由 痞子三分冷 提交于 2019-11-26 12:43:20
问题 say i have a java bean/an entity with 100 fields (inherited or not it is not relevant in this case). After update operations - in a transaction, i want to determine which fields are modified to track updates like a CVS. What is the easiest way to do this? Any Framework suggestion? Should i make two instances of this object and iterate over all fields and match the values of fields ? How would the best equals method seem in such situations ? The following equals() seems very awkward : return

Spring cannot find bean xml configuration file when it does exist

由 房东的猫 提交于 2019-11-26 12:36:53
问题 I am trying to make my first bean in Spring but got a problem with loading a context. I have a configuration XML file of the bean in src/main/resources. I receive the following IOException: Exception in thread \"main\" org.springframework.beans.factory.BeanDefinitionStoreException: IOException parsing XML document from class path resource [src/main/resources/beans.xml]; nested exception is java.io.FileNotFoundException: class path resource [src/main/resources/beans.xml] cannot be opened

Java Reflection Beans Property API

由 血红的双手。 提交于 2019-11-26 12:30:48
问题 Is there any standard way to access Java Bean Property like class A { private String name; public void setName(String name){ this.name = name; } public String getName(){ return this.name; } } So can I access this java bean property name using Reflection API so that when I change the value of property the methods of getName and setName are called automatically when I set and get values of that property 回答1: What you need is the BeanInfo / Introspector mechanism (see Bozho's answer). However,

Programmatically configure LogBack appender

由 狂风中的少年 提交于 2019-11-26 12:25:21
问题 I have a logback appender defined in the logback.xml, it\'s a DB appender, but I\'m curious if there is any way to configure the appender in java using my own connection pool defined as a bean. I find similar things, but never the actual answer. 回答1: Here a simple example that works for me (note that I use the FileAppender in this example) import org.slf4j.LoggerFactory; import ch.qos.logback.classic.Level; import ch.qos.logback.classic.Logger; import ch.qos.logback.classic.LoggerContext;

Using a Stateful Session Bean to track an user&#39;s session

由 不想你离开。 提交于 2019-11-26 12:09:47
问题 it\'s my first question here and I hope that I\'m doing it right. I need to work on a Java EE project, so, before starting, I\'m trying to do something simple and see if I can do that. I\'m stuck with Stateful Session Beans . Here\'s the question : How can I use a SFSB to track an user\'s session? All the examples that I saw, ended up in \"putting\" the SFSB into a HttpSession attribute. But I don\'t understand why! I mean, if the bean is STATEFUL, why do I have to use the HttpSession to keep

Difference between managed bean and backing bean

由 不打扰是莪最后的温柔 提交于 2019-11-26 12:08:21
问题 I came across the terms \"managed bean\" and \"backing bean\" in several forums. Many people think both are the same. But, there seems to be a slight difference. Can any one help me to understand the exact difference between these two terms? 回答1: Changing my initial answer - there is no meaningful difference between the two. The tutorial says that backing beans are later declared as managed beans. So, to summarize: a backing bean is the class out of context a managed bean is the backing bean

ClassFormatError: Absent Code attribute in method that is not native or abstract in class file javax/mail/MessagingException

由 蹲街弑〆低调 提交于 2019-11-26 11:14:07
问题 I am getting a strange ClassFormatError when using the javaMail api to send email on my spring mvc web app. Below is my mail-cfg.xml <?xml version=\"1.0\" encoding=\"UTF-8\"?> <beans xmlns=\"http://www.springframework.org/schema/beans\" xmlns:mvc=\"http://www.springframework.org/schema/mvc\" xmlns:context=\"http://www.springframework.org/schema/context\" xmlns:xsi=\"http://www.w3.org/2001/XMLSchema-instance\" xsi:schemaLocation=\" http://www.springframework.org/schema/beans http://www

Retrieving servlet context, session and request in a POJO outside container

由 我们两清 提交于 2019-11-26 09:57:31
问题 Is there any way to retrieve a session from a POJO? Or ultimately to retrieve a bean from a POJO. To clarify: Basically I am creating a bean from a servlet and I need to access the properties of that bean from outside of the web container (from a POJO). I cannot pass the request to the pojo; and the request is needed to retrieve the session. More specifically I have a web application that uses the Cactus framework to run JUnit tests from a web interface. However the servlet that invokes the
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