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The difference between servlets and JSP is that servlets typically embed HTML inside Java code, while JSPs embed Java code in HTML. In general, when using JSPs, embedding Java code in JSP is considered bad practice. [8] Instead, a better approach would be to move the back-end logic from the JSP to the Java code in the Servlet. [8]
The specific difference listed was that a servlet would intercept the request, place the content to render into a request attribute (typically represented by a JavaBean), then call a JSP to render the content in the desired output format. This model differed from the previous model in the fact that JSP technology was used as a pure template engine.
JSPs are translated into servlets at runtime, therefore JSP is a Servlet; each JSP servlet is cached and re-used until the original JSP is modified. [ 3 ] Jakarta Server Pages can be used independently or as the view component of a server-side model–view–controller design, normally with JavaBeans as the model and Java servlets (or a ...
In contrast, Struts and the Spring MVC Framework are action-oriented frameworks that provide a thinner abstraction layer over the servlet API. Apache Tiles is a templating framework designed to work with Struts. Facelets is a view definition and templating technology designed to work with JSF. SiteMesh can be used with any Jakarta Pages (JSP).
A web container (also known as a servlet container; [1] and compare "webcontainer" [2]) is the component of a web server that interacts with Jakarta Servlets.A web container is responsible for managing the lifecycle of servlets, mapping a URL to a particular servlet and ensuring that the URL requester has the correct access-rights.
In Jakarta EE a (web) UI can be built using Jakarta Servlet, Jakarta Server Pages (JSP), or Jakarta Faces (JSF) with Facelets. The example below uses Faces and Facelets. Not explicitly shown is that the input components use the Jakarta EE Bean Validation API under the covers to validate constraints.
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Velocity, JSP Cached templates Built-in validation Apache OFBiz: Java, Groovy, XML, jQuery: Yes Push-pull Yes Entity Engine (Internal kind of ORM, not really ORM, notably used by Atlassian Jira) JUnit Entity Engine Tools, Data File Tool, CSV Parser, Apache POI Internal Security framework based on OWASP