Develop Reference

Remove .jsp ending with tomcat and nginx

I would like to www.example.com/test.jsp as www.example.com/test.
URL rewriting and so on should be too slow. Are there any alternatives? For example, maybe using the jsp files or only servlets when they work with java?
I'm looking for good solution in terms of performance and for the google ranking. The website has 200 pages and grows, so I can't do it manually for every page.
I googled but I didn't find a good answer.

Can't believe you wrote a website with 200+ separate jsp pages. Consider changing site architecture, for example if you have online store with many pages of the same type, you could write only one jsp content page as template and use RESTful architecture to build real page content.

In the nginx configuration, you can make a rewrite of the url when you do the proxy pass

Detect page change Java spring

I have a java spring app. It has many views. I got my app started using a template, and I'm trying to understand how exactly it's working. Basically, i have a single index.html page, and many html files which are used as views with the url looking ilke 'mysite.com/#/view0' . I want my java code to be able to detect that a use has changed a url (or loaded a different view) without having my javascript code send a rest request to the server. is this possible? I haven't posted any code as I'm stumbling through my question here, but if there is any further clarification I can give, please let me know

If you're using javascript routing (Which I assume because you're using a hash in the url) then no. There's nothing for the server to natively 'detect' because anchors (#) don't make a server side request.

Web interface for a Java application

I recently developed a whole system in Java that connected to a database and exports and imports the table content to an excel sheet. I used SWING for the user interface. the user will interact with it for authentication and file management.
Apparently the client changed the requirements, He wants everything from a Web Interface. My team leader advised to look through JSP.
What does JSP actually do?
Will I have to rewrite the User Interface in Web if I used JSP?
is there an more effective and efficient solution to do this job?
I would Appreciate a specific answer

I'm not sure what you mean by "specific answer", but here goes:
JSP is a kind of template language, based on Java, and a technology for dynamically generating HTML. It's a server side technology. Look here.
Yes, if you're going for a pure web/HTML solution, you'll need to completely rewrite the UI.
There are other frameworks for creating webapps, such as Vaadin or Play! Framework that may be "better" than JSP, but then there's a whole new API/framework to learn...

What does JSP actually do?
Will I have to rewrite the User Interface in Web if I used JSP?
is there an more effective and efficient solution to do this job?
and
I used SWING for the user interface.
and
exports and imports the table content to an excel sheet.
not, have to look at JavaFX 2

You will certainly need to rewrite the user interface if you convert to JSPs.
JSPs are essentially just a method for dynamically generating HTML (with the option to embed Java code to produce parts of the page).
It is still possible to run Swing applications from a web browser: you might want to take a look at Java Web Start. This will save you from having to do a complete rewrite.

1.) JSP is pretty much like PHP. It is server side scripting. When ever a browser request for a page (JSP page), server (mostly Tomcat or any application server which you deploy your JSP project) will generate HTML content using the JSP code. Mainly JSP consist of part HTML, JavaScipt (if you want dynamic stuff), and Java.
2.) As far as I know if you are aked to do it in JSP then you need to o all the client side work again in JSP. There you will be generating HTML UIs using Java codes. But you can use all the back end codes you used.

You may can use SWING in a Applet.

Extracting JSP page content

I am working on a Mail API module where i have to develop a generic functionality of sending Mails with respect to various functionality in the Appliication.
There is one proposed functionality where the module will expose a method which along with some required parameters will take nane of JSP template.
It expects that this will extract the content of the JSP which will be a well formated mail template and send mail.
Is there any way in JAVA where i can extract the content (HTML) from this JSP page so that i can use that HTML content in to the Mail.
Thanks in advance

You have two paths to go, with the first one being a little shorter:
use new URL("http://site.com/url/to/page.jsp").openConnection(), get the InputStream and read the contents - this will be as if your server sends a request to itself and gets the result
use a Filter and a HttpServletResponseWrapper, and return a custom Writer / OutputStream. Each time something is written to the writer / stream, delegate it to the original object, and also write it somewhere where you can read it from later. This explanation is not sufficient, because this is less likely what you need, but if you are willing to take this path, tell me.
That's, however, not the way this is usually done. You'd better use some templating technology like Freemaker or Velocity for your email templates.

It sounds like you're trying to use JSPs as a templating engine for your email, which is something it wasn't intended to do. There are other technologies out there better suited for what you want, like Velocity and Freemarker.
However, if you're dead-set on using JSP, you have two options :
1) You can use the method described by Bozho to, essentially, connect to your own site and have it generate the content for you
2) You can write the JSP, compile it at compile time, and include the generated servlet file in your email generator and mock the inputs to the Servlet API that the generated JSP servlet will be expecting to extract content from your compiled JSP.

How Can I rewrite SEO friendly URL on STRUTS?

We have a website which is coded Java with Struts Framework. The WebSite's Urls are not seo friendly. All of them are like below
../buyerApplication.do&companyId=2323
Now We want to make these URLs SEO friendly and I searched and found these solutions:
tuckey.org/urlrewrite : but i don't rely on this system.
adding
title end of link after '&' such as
"../newsId=33233&does-art-in-the-city-equal-art-for-the-city"
: In this solution I am not sure it
works well.
I am waiting your sugestions to solve this problem best.

I actually used URLRewriter (http://tuckey.org/urlrewrite/), which you referenced in your original question. It was very easy to set up and filled my needs perfectly.

To the point, you need a Filter for this.
If you want to keep your existing application's architecture, you'll need to define and create a set of rules to convert unfriendly urls to friendly urls and let the filter convert it and forward the request to the unfriendly url.
If there is no means of modifying an existing application but you want to create a new application based on this idea, you could consider to having a single page controller which translates the HttpServletRequest#getPathInfo()/getRequestURI() to execute the appropriate action class (command pattern) and finally forward the request to the appropriate JSP page. Not sure how that would fit into Struts as I haven't worked with Struts previously.

For what it's worth, you can also look at the REST plugin http://struts.apache.org/2.x/docs/rest-plugin.html, which amongst other things will make your URLs more friendly