Apache. Tomcat calls the Class reflection mechanism of Servlet principles, which is explained by the orc Class,

Apache. Tomcat calls the Class reflection mechanism of Servlet principles, which is explained by the orc Class,

There is a beast

package com.swift.servlet;public class OrcDemo {private int hp;private int mp;private int atk;public int getHp() {return hp;}public void setHp(int hp) {this.hp = hp;}public int getMp() {return mp;}public void setMp(int mp) {this.mp = mp;}public int getAtk() {return atk;}public void setAtk(int atk) {this.atk = atk;}public OrcDemo() {}public OrcDemo(int hp, int mp, int atk) {super();this.hp = hp;this.mp = mp;this.atk = atk;}public void orcInfo() {System.out.println("hp"+hp+"mp"+mp+"atk"+atk);}public static void main(String[] args) {OrcDemo orc=new OrcDemo(3000,2000,500);orc.orcInfo();}}

How to use the original Orcs object:
Public static void main (String [] args) {OrcDemo orc = new OrcDemo (3000,2000, 500); orc. orcInfo ();}
Use Class reflection to get all the contents of the orcs object:

Class c = Class. forName ("OrcDemo ");
OrcDemo od = (OrcDemo) c. newInstance ();
Od. orcInfo ();

Apache. tomcat is the Servlet called using this method.

In the web. xml configuration file
<Servlet>
<Servlet-name> ServletDemo </servlet-name>
<Servlet-class> com. swift. servlet. TestServlet </servlet-class>
</Servlet>
<Servlet-mapping>
<Servlet-name> ServletDemo <servlet-name>
<Url-pattern>/test </url-pattern>
</Servlet-mapping>

Use the com. swift. servlet. TestServlet in <servlet-class> com. swift. servlet. TestServlet </servlet-class> above for use.

Apply the reflected code just written
Class c = Class. forName ("OrcDemo ");
OrcDemo od = (OrcDemo) c. newInstance ();
Od. orcInfo ();
Change

Class c = Class. forName ("com. swift. servlet. testServlet "); // ServletDemo sd = (ServletDemo) c. newInstance ();/* tomcat uses the reflection method only because it does not know the ServletDemo class. here we can use its parent class to perform polymorphism */HttpServlet hs = c. newInstance (); hs. doGet ();