javabeans

问题 I'm developing a JSF 2.0 app that consumes a SOAP-based web service. I want to use in the JSFs pages most of the generated client classes for the Web Service - but the client classes are not managed beans (nor CDI beans)... and as there are a lot of client classes I don't think is feasible to add @ManagedBean or @Named annotations to all classes... Let me give you an example so things might get a bit clearer: The User class is a generated client class - this class has only two attributes

问题 I have to face this error: No suitable driver found for jdbc:ucanaccess://C:\Users\Asim Iqbal\Documents\PersonInfo.accdb org.apache.jasper.servlet.JspServletWrapper.handleJspException(JspServletWrapper.java:555) in my JSP project. But when I run PersonDAO.java separately, it works properly. But, by using Bean I have to face this type of error. These files are as followed. PersonDAO.java import java.util.*; import java.sql.*; import java.io.*; public class PersonDAO implements Serializable {

问题 I have an input field and a button. I want to check if the textinput is valid before executing the button action. If it is valid I will render a response message. I have a code like this: public void submitReportRequest() { if(nameField!=null){ System.out.println("aaaaaaaaaaaaa"); submitted=true; } if(nameField == null){ System.out.println("report name is null!!!!!!"); } } but from the console I just get: [#|2011-11-18T15:22:49.931+0200|INFO|glassfishv3.0|null|_ThreadID=21;_ThreadName=Thread

问题 This question already has answers here : How can I find all beans with the custom annotation @Foo? (5 answers) Closed 3 years ago . How do we know bean is managed by spring container?For example,some bean maybe not scaned,and how do we know(some bean using @controller may not throw an error).Is any tool to scan the program memory and show all registered beans?Is there any way to query beans by name or other condition? That's what i want to know, i have been searching from google and nothing

问题 This question already has answers here : How can I find all beans with the custom annotation @Foo? (5 answers) Closed 3 years ago . How do we know bean is managed by spring container?For example,some bean maybe not scaned,and how do we know(some bean using @controller may not throw an error).Is any tool to scan the program memory and show all registered beans?Is there any way to query beans by name or other condition? That's what i want to know, i have been searching from google and nothing

问题 I want to print out the contents of a backing bean in an auto-generated way. So all the contents appear on a JSP. Is this possible anyhow? Thanks in advance, Daniel 回答1: One way to do this would be using the JavaBean API and a custom tag function. WEB-INF/tld/beans.tld: <?xml version="1.0" encoding="UTF-8" ?> <taglib xmlns="http://java.sun.com/xml/ns/javaee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee/web-jsptaglibrary_2_1.xsd"

问题 After a lot of research I've been unable to find a resolution. I have a JSP page backed by a servlet that I'm setting up to run on the Google App Engine. I've created a bean (Client) to facilitate the transfer of my form fields between the JSP and the servlet. This has been working fine in most cases. As a part of my servlet, I do some validation on the user-entered form values. If there is validation error I use the RequestDispatcher to forward the request back to the JSP page so that an

问题 What triggers Spring's Session Bean to exist in the container, and what removes it? Basically, I want to understand the web flow's effect on Session Bean. 回答1: Session bean is created when you try to access it from view for the first time or you want to access a bean that depends on it. It is stored in HTTP session so it is removed when session expires or is explicitly destroyed - this part is managed by a servlet container rather than spring. 来源： https://stackoverflow.com/questions/5527957

问题 my aim is to copy fields of one object into another, but only those that aren't null. I don't want to assign it explicitly. A more generic solution would be very useful and easier to maintain i.e. for implementing PATCH in REST API where you allow providing only specific fields. I saw this similar thread and I'm trying to implement some of the ideas from here: Helper in order to copy non null properties from object to another ? (Java) But the objects aren't altered in any way after the

问题 How to send bean from server side and receive this bean in the client side by Netty? When I send simple integer message, inputstream, it works successfully but I need to send bean. 回答1: If you are using netty at client and server side then you can use the Netty ObjectDecoder and ObjectEncoder in your ChannelPipeline to send and receive objects. Take a look at the netty ping pong example which does this. The code is bit out of date, but you will get the general idea on working with objects. 来源