Servlet三种创建方式
第一种:实现Servlet接口
package com.manager;
import javax.servlet.*;
import java.io.IOException;
/**
* 实现Servlet接口
*/
public class Servlet1 implements Servlet {
/*初始化*/
@Override
public void init(ServletConfig servletConfig) throws ServletException {
}
/*获取Servlet配置信息*/
@Override
public ServletConfig getServletConfig() {
return null;
}
/*服务*/
@Override
public void service(ServletRequest servletRequest, ServletResponse servletResponse) throws ServletException, IOException {
}
@Override
public String getServletInfo() {
return null;
}
/*销毁*/
@Override
public void destroy() {
}
}
第二种:继承GenericServlet类
package com.manager;
import javax.servlet.GenericServlet;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
import java.io.IOException;
/**
* 继承GenericServlet类
*/
public class Servlet2 extends GenericServlet {
/*只有一个服务方法*/
@Override
public void service(ServletRequest servletRequest, ServletResponse servletResponse) throws ServletException, IOException {
}
}
第三种:继承HttpServlet类
package com.manager;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
/**
* 继承HttpServlet类
*/
public class Servlet3 extends HttpServlet{
/*get提交方法*/
@Override
protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
}
/*post提交方法*/
@Override
protected void doPost(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
}
}