Web Dev Box

So far, I stimulate got non written much virtually REST together with RESTful spider web service barring simply about interview questions e.g. REST vs SOAP , which is thankfully really much appreciated past times my readers together with simply about full general suggestions virtually best books to acquire REST inwards past, but today I am going to write something virtually RESTTemplate cast from Spring MVC framework. Like its predecessors JdbcTemplate together with JmsTemplate, the RestTemplate is simply about other useful utility cast which allows you lot to interact amongst RESTful spider web services from a Java application built using Spring framework. It's a characteristic rich together with supports almost all REST methods e.g. GET, POST, HEAD, PUT or DELETE, though we'll solely job the GET method inwards this article to eat a RESTful Web Service together with convert the JSON reply to Java objects. It's 1 of the basic but interesting examples, given you lot volit...

String inwards Java is considered empty if its non aught too it’s length is zero. By the way earlier checking length you lot should verify that String is non aught because calling length() method on null String will effect inwards java.lang.NullPointerException . Empty String is represented past times String literal “” . definition of empty String may last extended to those String every bit good which entirely contains white infinite but its an specific requirement too inwards full general String amongst white infinite are non considered every bit empty String inwards Ja va. Since String is ane of the well-nigh oft used shape too normally used inwards method arguments, nosotros often needs to cheque if String is empty or not. Thankfully at that topographic point are multiple ways to notice if String is empty inwards Java or not . You tin strength out every bit good count divulge of characters inwards String, every bit String is represented every bit graphic symbol array a nd de...

One of the easiest as well as oldest ways to run a Java plan which depends on an external library or framework is to download dependency JAR files, position it on the classpath as well as thus run the plan past times creating a Main shape amongst the main() method. This is unproblematic but non every bit tardily every bit yous think, at that spot are many challenges downwards the route e.g. yous ask to discovery the correct version of JAR files as well as their dependencies e.g. Spring mightiness accept a dependency on other tertiary political party libraries similar Log4j . So, when the build tool similar Maven as well as Gradle comes, everybody stopped downloading the JAR file manually. All they create is specify the Maven dependency as well as Maven volition download the JAR file of specified version along amongst their dependencies. This greatly simplified the evolution as well as testing of Java application which uses a framework similar Spring as well as Hibernate . Bu...

If you lot accept worked inwards Spring MVC than you lot may hold upwards familiar alongside   java.lang.ClassNotFoundException: org.springframework.web.context.ContextLoaderListener ,  which is mutual work during deployment. Spring MVC throws   java.lang.ClassNotFoundException:                           org.springframework.web.context.ContextLoaderListener , when its non able to notice org.springframework.web.context.ContextLoaderListener bird which is used to charge boundary MVC configuration files similar application-context.xml too other Spring Framework configuration files defined inwards context-param chemical element of web.xml inwards an Spring MVC spider web application as: <!-- boundary mvc setup --> < context-param >     < param-name > contextConfigLocation </ param-name > ...