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Access to class methods from servlet


Access to class methods from servlet

By : Timmy Vitale
Date : November 15 2020, 06:54 AM
should help you out I want to call a method from servlet. I have below class: , Try create instance and call it like:
code :
course courseResult = new course();
ResultSet resultSet = courseResult.course_in_dept("Engineering");


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Deploying a gwtp maven app: See Servlet Spec 2.3, section 9.7.2. Offending class: javax/servlet/Servlet.class

Deploying a gwtp maven app: See Servlet Spec 2.3, section 9.7.2. Offending class: javax/servlet/Servlet.class


By : Aldorin
Date : March 29 2020, 07:55 AM
wish help you to fix your issue You shouldn't have gwt-user in your WAR. There should be gwt-servlet if your use GWT-RPC, or requestfactory-server if you use RequestFactory.
In other words, the gwt-user dependency in the pom.xml should have provided and you should add a dependency on gwt-servlet with runtime.
java -verbose:class shows that the servlet is loaded but a static content is initialized only when the servlet is access

java -verbose:class shows that the servlet is loaded but a static content is initialized only when the servlet is access


By : Amir
Date : March 29 2020, 07:55 AM
I hope this helps . The Java Language Specification states
code :
-verbose:class
Is it a bad practice to make methods in a Servlet Class?

Is it a bad practice to make methods in a Servlet Class?


By : Marie-Eve Duguay
Date : March 29 2020, 07:55 AM
this will help Nothing stops you from doing so. It's all about the architecture you follow. In MVC, The model, view, and controller(servlets) are actually decoupled.
Tomorrow if there is a change in the business logic. Model(service to be more specific) is the only layer that would be affected and the other two components don't event care
Error: Servlet Jar not Loaded... Offending class: javax/servlet/Servlet.class

Error: Servlet Jar not Loaded... Offending class: javax/servlet/Servlet.class


By : Arteo
Date : March 29 2020, 07:55 AM
this will help This is a sign of classpath pollution. The JSP/Servlet API libraries are appserver implementation dependent and belongs in case of Tomcat 6 in the Tomcat/lib folder and should in no way be moved nor duplicated somewhere else. It's recipe for portability trouble and collisions in classloading as you've encountered now. The libraries in webapp have precedence in classloading. If the servlet-api.jar is encountered there, it is in turn looking for its dependencies there, but they were apparently missing in there.
You must remove any appserver-specific libraries from the webapp's Webapp/WEB-INF/lib. You should only put webapp-specific libraries in there. Keep appserver-specific libraries in the appserver's own default classpath, which is the Tomcat/lib in your case. Keep it untouched. You can at most add libraries which you'd like to share among all webapps in there, or even better, configure the shared.loader in Tomcat/conf/catalina.properties for that.
jar not loaded. See Servlet Spec 2.3, section 9.7.2. Offending class: javax/servlet/Servlet.class

jar not loaded. See Servlet Spec 2.3, section 9.7.2. Offending class: javax/servlet/Servlet.class


By : Mario René Hernández
Date : March 29 2020, 07:55 AM
like below fixes the issue The servlet API .jar file must not be embedded inside the webapp since, obviously, the container already has these classes in its classpath: it implements the interfaces contained in this jar.
The dependency should be in the provided scope, rather than the default compile scope, in your Maven pom:
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