Servlet简单的登陆窗口

web.xml配置：

jsp代码：

注意：action书写的是为这次登陆做处理类的别名，method就是请求的方式

Get请求方式没有请求实体

//如果只是看效果就光写一下service方法就行了

package com.zyb.test;

import java.io.IOException;

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

import com.sun.java_cup.internal.runtime.Symbol;

public class TestServlet extends HttpServlet {
@Override
protected void service(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
    resp.getWriter().write("test file");//打印在页面上
    System.out.println("test file");//打印在控制台

}
@Override
    public void init() throws ServletException {

        System.out.println("Servlet初始化完成！");
    }

public void destory() {

    System.out.println("Servlet销毁完成！");
}

@Override
    protected void doPost(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
    System.out.println("我是doPost方法!");
    }
@Override
    protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
    System.out.println("我是doGet方法!");
    }

}

　

最终效果：