Is there any way to debug web applications using Eclipse?

Question

I am working on a web application using the Eclipse Java IDE.

I am using Tomcat 6 as my servlet container.

The tools available for Java, inculding Eclipse, seem to lack debugging capabilities for web applicatons (as compared to Visual Studio for the .NET platform).

How can I debug my web app using Eclipse?

Answer 1

在调试模式下运行tomcat（Java选项-Xdebug -Xnoagent -Djava.compiler=NONE -Xrunjdwp:transport=dt_socket,server=y,suspend=n,address=8000 ），然后在Eclipse中使用远程调试（调试配置->远程Java Aplication）并通过已配置的端口（例如本例中的8000）连接到服务器。

Answer 2

If you want to debug your web application, set breakpoints where desired and run Tomcat on debug mode. If you logged your exceptions or placed INFO / DEBUG messages, you can view them on Console (if ConsoleAppender is used).

The essential thing is that your application runs on debug mode. For browser side debugging (as @Thomas said), there's tools like Chrome Debugger (for Google Chrome), Firebug (for Firefox) and Firebug Lite (for other browsers).

Answer 3

您可以在代码中添加断点，并以调试模式部署应用程序。

Answer 4

Eclipse has a console window where you can see the error messages generated. For the web there are an add ons or built on the browser like firebug for Firefox and Google-chrome developers-tools. Try too look on it.