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Servlet ???????????

Sun ?????????????? Servlet ???????????? javax.servlet.Servlet????????????? Servlet ???????

1. Servlet ??

?????

public abstract interface Servlet

?????

2. ServletConfig ??

?????

public abstract interface ServletConfig

????? ServletConfig ????? Servlet ???????????????? Servlet ?????????? init(ServletConfig config) ????????? ServletConfig ???????????????

?????

3. ServletContext ??

?????

public interface ServletContext

????? ServletContext ?????? Web ???????????????????????

?????

????

? web.xml ????? Servlet ? ServletConfig ???

   
    
    
     test
    
    
    
     com.wangxing.servlet.TestServlet
    
    
    
        
     
      config
     
        
     
      test1
     
    
    
    
    
        
     
      config
     
        
     
      test2
     
    
    
   
   
    
    
     test
    
    
    
     /test
    
   

?? Servlet ?

package com.wangxing.servlet;
import java.io.IOException;
import javax.servlet.ServletException;
import javax.servlet.Servlet;
import javax.servlet.ServletConfig;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
public class TestServlet implements Servlet {
    @Override
    public void init(ServletConfig config) throws ServletException {
        System.out.println("servlet???");
    }
    @Override
    public ServletConfig getServletConfig() {
        System.out.println("??ServletConfig??");
        return null;
    }
    @Override
    public void service(ServletRequest req, ServletResponse res) throws ServletException, IOException {
        System.out.println("??HTTP??");
    }
    @Override
    public String getServletInfo() {
        System.out.println("??servlet??");
        return null;
    }
    @Override
    public void destroy() {
        System.out.println("??servlet");
    }
}

?????????????????? Servlet ???????????