1. The introduction of JSTL can make the code such as <%%> disappear in the JSP code, and combined with EL expressions, it will be more convenient and beautiful.
2. Each set of frameworks (not yet learned, such as struts, SpringMVC, etc.) has its own tag library. At this time, JSTL can be used as a public and general framework and run rampant in each framework.
operate:
Step 1: Download the JSTL package
http://tomcat.apache.org/taglibs/
The second step is to create a new jsp page
