How do I import the javax servlet API in my Eclipse project

Question

I want to develop with Servlets in Eclipse  but it says that the package javax servlet cannot be resolved  How can I add javax servlet package to my Eclipse project

User · Accepted Answer

Ensure you ve the right Eclipse and Server Ensure that you re using at least Eclipse IDE for Enterprise Java developers  with the Enterprise   It contains development tools to create dynamic web projects and easily integrate servletcontainers  those tools are part of Web Tools Platform  WTP   In case you already had Eclipse IDE for Java  without Enterprise   and manually installed some related plugins  then chances are that it wasn t done properly  You d best trash it and grab the real Eclipse IDE for Enterprise Java one  You also need to ensure that you already have a servletcontainer installed on your machine which implements at least the same Servlet API version as the servletcontainer in the production environment  for example Apache Tomcat  Oracle GlassFish  JBoss AS WildFly  etc  Usually  just downloading the ZIP file and extracting it is sufficient  In case of Tomcat  do not download the EXE format  that s only for Windows based production environments  See also a o  Several ports  8005  8080  8009  required by Tomcat Server at localhost are already in use  A servletcontainer is a concrete implementation of the Servlet API  Note that the Java EE SDK download at Oracle com basically contains GlassFish  So if you happen to already have downloaded Java EE SDK  then you basically already have GlassFish  Also note that for example GlassFish and JBoss AS WildFly are more than just a servletcontainer  they also supports JSF  EJB  JPA and all other Java EE fanciness  See also a o  What exactly is Java EE   Integrate Server in Eclipse and associate it with Project Once having installed both Eclipse for Enterprise Java and a servletcontainer on your machine  do the following steps in Eclipse   Integrate servletcontainer in Eclipse a  Via Servers view  Open the Servers view in the bottom box   Rightclick there and choose New  gt  Server   Pick the appropriate servletcontainer make and version and walk through the wizard     b  Or  via Eclipse preferences  Open Window  gt  Preferences  gt  Server  gt  Runtime Environments   You can Add  Edit and Remove servers here      Associate server with project a  In new project  Open the Project Navigator Explorer on the left hand side   Rightclick there and choose New  gt  Project and then in menu Web  gt  Dynamic Web Project   In the wizard  set the Target Runtime to the integrated server     b  Or  in existing project  Rightclick project and choose Properties   In Targeted Runtimes section  select the integrated server     Either way  Eclipse will then automatically take the servletcontainer s libraries in the build path  This way you ll be able to import and use the Servlet API     Never carry around loose server-specific JAR files You should in any case not have the need to fiddle around in the Build Path property of the project  You should above all never manually copy download move include the individual servletcontainer-specific libraries like servlet-api jar  jsp-api jar  el-api jar  j2ee jar  javaee jar  etc  It would only lead to future portability  compatibility  classpath and maintainability troubles  because your webapp would not work when it s deployed to a servletcontainer of a different make version than where those libraries are originally obtained from  In case you re using Maven  you need to make absolutely sure that servletcontainer-specific libraries which are already provided by the target runtime are marked as  lt scope gt provided lt  scope gt   Here are some typical exceptions which you can get when you litter the  WEB-INF lib or even  JRE lib   JRE lib ext  etc with servletcontainer-specific libraries in a careless attempt to fix the compilation errors   java lang NullPointerException at org apache jsp index jsp  jspInit java lang NoClassDefFoundError  javax el ELResolver java lang NoSuchFieldError  IS DIR java lang NoSuchMethodError  javax servlet jsp PageContext getELContext  Ljavax el ELContext  java lang AbstractMethodError  javax servlet jsp JspFactory getJspApplicationContext Ljavax servlet ServletContext  Ljavax servlet jsp JspApplicationContext  org apache jasper JasperException  The method getJspApplicationContext ServletContext  is undefined for the type JspFactory java lang VerifyError   class  org apache jasper runtime JspApplicationContextImpl  method  createELResolver signature    Ljavax el ELResolver   Incompatible argument to function jar not loaded  See Servlet Spec 2 3  section 9 7 2  Offending class  javax servlet Servlet class

User · Answer

Quick Fix- This worked in Eclipse - Right Click on project -  Properties -  Java Build Path  Tab  -  Add External JARs -  locate the servlet api jar implementation  if Tomcat - its named servlet-api jar  -  click OK  That s it

User · Answer

Many of us develop in Eclipse via a Maven project  If so  you can include Tomcat dependencies in Maven via the tomcat-servlet-api and tomcat-jsp-api jars  One exists for each version of Tomcat  Usually adding these with scope provided to your POM is sufficient  This will keep your build more portable   If you upgrade Tomcat in the future  you simply update the version of these jars as well

User · Answer

STEP 1    Go to properties of your project   with Alt Enter or righ-click    STEP 2  check on Apache Tomcat v7 0 under Targeted Runtime and it works

User · Answer

You should above all never manually copy download move include the individual servletcontainer-specific libraries like servlet-api jar       BalusC   I would prefer to use the exact classes that my application is going to use rather than one provided by Eclipse  when I am feeling like a paranoid developer     Another solution would be to use Eclipse  Configure Build Path    Libraries   Add External Jars  and add servlet api of whatever Container one chooses to use   And follow  kaustav datta s solution when using ant to build - have a property like tomcat home or weblogic home   However it introduces another constraint that the developer must install Weblogic on his her local machine if weblogic is being used    Any other cleaner solution

User · Answer

you can simply copy the servlet-api jar and copy that jar files into lib folder  which is in WEB-INF  then just clean and built your project  your errors will be solved       OR     you can directly add jar files to library by using following steps    Right click on project   Go To Properties  Go to Java Build Path  Select Add Library option from tabs  Add Jar Files give path of your servlet-api jar file  Clean and build your project

User · Answer

Little bit difference from Hari      Right click on project ---  Properties ---  Java Build Path ---  Add Library     ---   Server Runtime ---  Apache Tomcat ----  Finish

User · Answer

I was getting a null pointer exception during project creation related to  Dynamic Web Module     To get the project to compile  that is  to javax servlet to import successfully  I had to go to project s Properties  pick Project Facets in the sidebar  tick Dynamic Web Module and click Apply   Surprisingly  this time  Dynamic Web Module  facet installed correctly  and import started to work

User · Answer

For maven projects add following dependancy     lt  -- https   mvnrepository com artifact javax servlet servlet-api -- gt   lt dependency gt       lt groupId gt javax servlet lt  groupId gt       lt artifactId gt javax servlet-api lt  artifactId gt       lt version gt 3 0 1 lt  version gt       lt scope gt provided lt  scope gt   lt  dependency gt    Reference  For gradle projects   dependencies   providedCompile group   javax servlet   name   javax servlet-api   version   3 0 1      or download javax servlet jar and add to your project

User · Answer

Add javax servlet dependency in pom xml  Your problem will be resolved    lt dependency gt       lt groupId gt javax servlet lt  groupId gt       lt artifactId gt javax servlet-api lt  artifactId gt       lt version gt 3 0 1 lt  version gt       lt scope gt provided lt  scope gt   lt  dependency gt

User · Answer

I know this is an old post  However  I observed another instance where in the project already has Tomcat added but we still get this error  Did this to resolve that   Alt   Enter Project Facets On the right  next to details  is another tab  Runtimes   The installed tomcat server will be listed there  Select it   Save the configuration and DONE   Hope this helps someone

User · Answer

From wikipedia   import java io IOException  import java io PrintWriter   import javax servlet ServletException  import javax servlet http HttpServlet  import javax servlet http HttpServletRequest  import javax servlet http HttpServletResponse   public class HelloWorld extends HttpServlet     public void doGet HttpServletRequest request  HttpServletResponse response        throws ServletException  IOException       PrintWriter out   response getWriter        out println   lt  DOCTYPE HTML PUBLIC   -  W3C  DTD HTML 4 0                      Transitional  EN   gt  n                      lt html gt  n                      lt head gt  lt title gt Hello WWW lt  title gt  lt  head gt  n                      lt body gt  n                      lt h1 gt Hello WWW lt  h1 gt  n                      lt  body gt  lt  html gt             This  of course  works only if you have added the servlet-api jar to Eclipse build path  Typically your application server  e g Tomcat  will have the right jar file

User · Answer

Include servlet-api jar from your server lib folder   Do this step

User · Answer

This could be also the reason  i have come up with following pom xml    lt dependency gt       lt groupId gt org springframework boot lt  groupId gt       lt artifactId gt spring-boot-starter-web lt  artifactId gt       lt exclusions gt           lt exclusion gt               lt groupId gt org springframework boot lt  groupId gt               lt artifactId gt spring-boot-starter-tomcat lt  artifactId gt           lt  exclusion gt       lt  exclusions gt   lt  dependency gt    The unresolved issue was due to exclusion of spring-boot-starter-tomcat  Just remove  lt exclusions gt     lt  exclusions gt  dependency it will ressolve issue  but make sure doing this will also exclude the embedded tomcat server   If you need embedded tomcat server too you can add same dependency with compile scope    lt dependency gt       lt groupId gt org springframework boot lt  groupId gt       lt artifactId gt spring-boot-starter-tomcat lt  artifactId gt       lt scope gt compile lt  scope gt   lt  dependency gt

User · Answer

In my case  when I went to the Targetted Runtimes  screen  Tomcat 7 was not listed  disabled  despite being installed   To fix  I had to go to Preferences- Server- Runtime Environments then uninstall and reinstall Tomcat 7

[java] How do I import the javax.servlet API in my Eclipse project?

Ensure you've the right Eclipse and Server

Integrate Server in Eclipse and associate it with Project

Never carry around loose server-specific JAR files

Examples related to java

Examples related to eclipse

Examples related to servlets