java运用Tomcat实现简单的登录

最新推荐文章于 2025-05-27 20:42:44 发布

原创最新推荐文章于 2025-05-27 20:42:44 发布 · 385 阅读

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#java

这篇博客详细介绍了如何运用Java和Tomcat服务器来配置并实现一个简单的登录功能，涵盖了从index.jsp页面配置，到web.xml的设置，以及HelloServlet和LoginServlet的实现过程。

Tomcat配置
在这里插入图片描述
index.jsp配置

<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
  <head>
    <title>$Title$</title>
  </head>
  <body>
  <form action="/login" method="post">
    name:<input name="name" type="text">
    password:<input name="password" type="password">
    <input type="submit" value="login">
  </form>
  </body>
</html>

web.xml配置

<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns="http://xmlns.jcp.org/xml/ns/javaee"
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_4_0.xsd"
         version="4.0">
    
    <servlet>
        <servlet-name>helloServlet</servlet-name>
        <servlet-class>com.zr0629.servlet.HelloServlet</servlet-class>
    </servlet>

    <servlet-mapping>
        <servlet-name>helloServlet</servlet-name>
        <url-pattern>/hello</url-pattern>
    </servlet-mapping>


    <servlet>
        <servlet-name>loginServlet</servlet-name>
        <servlet-class>com.zr0629.servlet.LoginServlet</servlet-class>
    </servlet>

    <servlet-mapping>
        <servlet-name>loginServlet</servlet-name>
        <url-pattern>/login</url-pattern>
    </servlet-mapping>
    
</web-app>

HelloServlet

package com.zr0629.servlet;

import javax.servlet.*;
import java.io.IOException;

public class HelloServlet implements Servlet {


    @Override
    public void init(ServletConfig servletConfig) throws ServletException {

    }

    @Override
    public ServletConfig getServletConfig() {
        return null;
    }

    @Override
    public void service(ServletRequest servletRequest, ServletResponse servletResponse) throws ServletException, IOException {
        servletResponse.getWriter().write("hello,servlet");
    }

    @Override
    public String getServletInfo() {
        return null;
    }

    @Override
    public void destroy() {

    }
}

LoginServlet

package com.zr0629.servlet;

import com.sun.net.httpserver.HttpsServer;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;

public class LoginServlet extends HttpServlet {

    protected void doPost(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
        String name=req.getParameter("name");
        String password=req.getParameter("password");

        if (name.equals("123")&&password.equals("123")) {
            resp.getWriter().write("success!");
        } else {
            resp.getWriter().write("failed!");
        }

    }

}