I can't find these packages. How do I find and install them? Be specific!

ghostling

import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

tnt0331

1. If you use IDE (JBuilder, Eclipse, etc.) for development, these will be discovered automatically after the web container is specified.
2. If you don't use IDE and compile with command line (javac), you can download a web container such as Tomcat. In the common\lib directory of Tomcat, there are two packages: jsp-api.jar and servlet-api.jar, which are added to the CLASSPATH environment variable.

kansiken

Go to tomcat to find the servlet jar package

overdose

1. If you use IDE (JBuilder, Eclipse, etc.) for development, these will be discovered automatically after the web container is specified.
2. If you don't use IDE and compile with command line (javac), you can download a web container such as Tomcat. In the common\lib directory of Tomcat, there are two packages: jsp-api.jar and servlet-api.jar, which are added to the CLASSPATH environment variable.
There should be no problem!

leenight

The servlet.jar package contains: tomcat\common\lib\servlet.jar
Right-click on the project name in the project menu on the left in eclipse-> properties-> java build path-> select libraries-> add Externel JARS-> in the right window and add tomcat\common\lib\servlet-api.jar.

zitong1129

servlet-api.jar
This package is under the TOOMCAT / common / lib directory. The easiest way is to put it under the JDK and JRE extension package directory: the ext directory, remember to put both, so you can compile and run directly. Other packages can also use this method.