I got an error while creating a servlet in eclipse like
Multiple markers at this line
- ServletException cannot be resolved to a type
- HttpServletResponse cannot be resolved to a type
- HttpServletRequest cannot be resolved to a type
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7 Answers
You can do the following:
import the jar file inside your class:
Old Way:
import javax.servlet.http.HttpServletResponseNew Way:
import jakarta.servlet.http.HttpServletAdd the Apache Tomcat library:
Follow these steps:
- Right-click on your Project from Side Menu
- click
Properties(alt + enter)- Search for
java Build Path- Click on
Libraries- Click on
Add libraryfrom the right side menu- Choose
server runtimeand clicknext- Choose Apache Tomcat v10 (any version which is available to you)
- Click
FinishthenApply Changes
Also, First of all, make sure that the Servlet jar is included in your class path in eclipse as PermGenError said.
This will solve your error.
1 Comment
Borea Deitz
Even knowing to replace
javax with jakarta, I would not have guessed to replace HttpServletResponse at the end with HttpServlet. How did you know to do this? I can't find an actual mapping between these namespaces anywhere, and none of the "comprehensive" guides to the javax->jakarta transition provide this information.Two possible issues could be
- you either forgot to include Servlet jar in your classpath
- you forgot to import it in your Servlet class
To include Servlet jar in your class path in eclipse, Download the latest Servlet Jar and configure using buildpath option. look at this Link for more info.
If you have included the jar make sure that your import is declared.
import javax.servlet.http.HttpServletResponse 
1 Comment
Kevin Bowersox
it may be best to point to the application servers runtime instead of pulling in servlet.jar
Project > Properties > Java Build Path > Libraries > Add library from library tab > Choose server runtime > Next > choose Apache Tomcat v 7.0> Finish > Ok
Comments
if you are using maven:
<dependency> <groupId>javax.servlet</groupId> <artifactId>javax.servlet-api</artifactId> <version>3.0.1</version> <scope>provided</scope> </dependency> 
Comments
Are the classes imported? Try pressing CTRL + SHIFT + O to resolve the imports. If this does not work you need to include the application servers runtime libraries.
- Windows > Preferences
- Server > Runtime Environment
- Add
- Select your appropriate environment, click Next
- Point to the install directory and click Finish.
Comments
As a reason of this problem, some code is broken or undefined.You may see an error in a java class such as "The type javax.servlet.http.HttpSession cannot be resolved. It is indirectly referenced from required .class files". you shuold download " javax.servlet.jar" as mentioned before. Then configure your project build path, add the javax.servlet.jar as an external jar.I hope it fixes the problem.At least it worked for me.
