javabeans

JPA 2.0 : Exception to use javax.validation.* package in JPA 2.0

由 ￣綄美尐妖づ 提交于 2019-11-27 01:40:20
when i try to using bean validation with JPA using hibernate , the follwoing exception will occur : Exception in thread "main" javax.persistence.PersistenceException: [PersistenceUnit: Chapter11] Unable to build EntityManagerFactory at org.hibernate.ejb.Ejb3Configuration.buildEntityManagerFactory(Ejb3Configuration.java:915) at org.hibernate.ejb.Ejb3Configuration.buildEntityManagerFactory(Ejb3Configuration.java:890) at org.hibernate.ejb.HibernatePersistence.createEntityManagerFactory(HibernatePersistence.java:57) at javax.persistence.Persistence.createEntityManagerFactory(Persistence.java:63)

Word Wrap in Net Beans

由 邮差的信 提交于 2019-11-27 01:24:43
问题 Netbeans is great but there's no way to wrap text in it (or hopefully I haven't found it yet). Is there any way to do this, and if not, is there any similarly good IDE for Java with this functionality (hopefully free as well). 回答1: You can use word wrap in Netbeans. Add the following to netbeans.conf (netbeans_installation_path/etc/netbeans.conf, by default /etc/netbeans.conf under linux): -J-Dorg.netbeans.editor.linewrap=true to the sixth line so it looks like this: netbeans_default_options=

Spring - using static final fields (constants) for bean initialization

由 a 夏天 提交于 2019-11-27 00:09:18
问题 is it possible to define a bean with the use of static final fields of CoreProtocolPNames class like this: <bean id="httpParamBean" class="org.apache.http.params.HttpProtocolParamBean"> <constructor-arg ref="httpParams"/> <property name="httpElementCharset" value="CoreProtocolPNames.HTTP_ELEMENT_CHARSET" /> <property name="version" value="CoreProtocolPNames.PROTOCOL_VERSION"> </bean> public interface CoreProtocolPNames { public static final String PROTOCOL_VERSION = "http.protocol.version";

Json <-> Java serialization that works with GWT [closed]

由 ぃ、小莉子 提交于 2019-11-26 23:38:30
I am looking for a simple Json (de)serializer for Java that might work with GWT. I have googled a bit and found some solutions that either require annotate every member or define useless interfaces. Quite a boring. Why don't we have something really simple like class MyBean { ... } new GoodSerializer().makeString(new MyBean()); new GoodSerializer().makeObject("{ ... }", MyBean.class) Take a look at GWT's Overlay Types . I think this is by far the easiest way to work with JSON in GWT. Here's a modified code example from the linked article: public class Customer extends JavaScriptObject { public

Property 'someproperty' not found on type java.lang.String

由 此生再无相见时 提交于 2019-11-26 23:31:13
问题 I am getting this error and I can not figure out where the problem might be. The "userid" column is in the database and is in the bean. Does anyone have any idea? org.apache.jasper.JasperException: An exception occurred processing JSP page /user.jsp at line 24 21: 22: <form method="POST" action="AdminServlet" name="frmAddUser"> 23: User ID : <input type="text" readonly="readonly" name="userid" 24: value="<c:out value="${user.userid}" />" /> Username : <input 25: type="text" name="firstName"

when is a spring beans destroy-method called?

由 三世轮回 提交于 2019-11-26 22:53:26
问题 I have put a sysout statement in the "destroy-method" for a bean. When i run a sample code, the sysout is not getting output. Does that mean the destroy-method is not getting called ? The Test Class: package spring.test; import org.springframework.context.ApplicationContext; import org.springframework.context.support.ClassPathXmlApplicationContext; public class InitTest { public static void main(String[] args) { ApplicationContext ctx = new ClassPathXmlApplicationContext("InitTestContext.xml"

Naming convention for getters/setters in Java

由 生来就可爱ヽ(ⅴ＜●) 提交于 2019-11-26 22:49:18
if I have the following private member: private int xIndex; How should I name my getter/setter: getXindex() setXindex(int value) or getxIndex() setxIndex(int value) EDIT: or getXIndex() setXIndex(int value); ? Thomas Einwaller The correct answer is getxIndex() setxIndex(int value) if you want them to be used as properties according to section 8.8: Capitalization of inferred names of the JavaBeans API specification (e.g. access them via ${object.xIndex} in a JSP. Love In accordance with JavaBeans API specification from 1997 it should be as Thomas Einwaller describes. private int xIndex; public

Why shouldn't I use immutable POJOs instead of JavaBeans?

由 十年热恋 提交于 2019-11-26 22:29:47
问题 I have implemented a few Java applications now, only desktop applications so far. I prefer to use immutable objects for passing the data around in the application instead of using objects with mutators (setters and getters ), also called JavaBeans. But in the Java world, it seems to be much more common to use JavaBeans, and I can't understand why I should use them instead. Personally the code looks better if it only deals with immutable objects instead of mutate the state all the time.

pass list in Java Beans List in Jasper Report

由 别等时光非礼了梦想. 提交于 2019-11-26 21:54:14
问题 I am using Jasper Report with Servlet. Team Bean looks like private int tid; private String title; private List<Member> members; //getter and setter Member bean looks like private int id; private String name; //getter and setter In report Servlet, List<Team> teams = service.getTeams(); Map parameters = new HashMap(); JasperPrint jasperPrint = null; jasperPrint = JasperFillManager.fillReport(jasperReport, parameters, new JRBeanCollectionDataSource(teams)); When add teams in new

What is java pojo class, java bean, normal class? [duplicate]

由 ↘锁芯ラ 提交于 2019-11-26 21:16:26
Possible Duplicate: Difference between DTO, VO, POJO, JavaBeans? Hi please don't say my question is duplicate :-) I saw all questions but didn't understand the exact difference. Can someone explain what is POJO , Bean , Normal Class in easy language? Kumar Vivek Mitra Normal Class : A Java class Java Beans : All properties private (use getters/setters) A public no-argument constructor Implements Serializable. Pojo : Plain Old Java Object is a Java object not bound by any restriction other than those forced by the Java Language Specification. I.e., a POJO should not have to Extend prespecified
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