课本在servlet中检索参数并验证，最后向用户发送验证消息

这网页代码是我直接审查网页源代码后照抄的


<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>登录页面</title></head>
<body>
<form action="user-login" method="get">
<fieldset>
<legend>用户登录</legend>
<p>
<label>用户名: <input type="text" name="username"/>
</label>
</p>
<p>
<label>密&nbsp;&nbsp;码：<input type="password" name="password"/>
</label>
</p>
<p>
<label><input type="submit" value="登录"/>
<input type="reset" value="取消"/>
</label>
</p>
</fieldset>   
</form>
</body>
</html>


package com.demo;
 
import java.io.IOException;
import java.io.PrintWriter;
 
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
 
/**
 * Servlet implementation class LoginServlet
 */
@WebServlet("/user-login")
public class LoginServlet extends HttpServlet {
	private static final long serialVersionUID = 1L;
       
    /**
     * @see HttpServlet#HttpServlet()
     */
    public LoginServlet() {
        super();
        // TODO Auto-generated constructor stub
    }
 
	/**
	 * @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse response)
	 */
	protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
		String username=request.getParameter("username");
		String password = request.getParameter("password");
		response.setContentType("text/html;charset=UTF-8");
		PrintWriter out=response.getWriter();
		out.println("");
		out.println("\r\n"
				+ "\r\n"
				+ "登录页面");
		out.println("");
		if("admin".equals(username)&&"12345".equals(password)) {
			out.println("许嘉茵成为我妻子"+username);
		}else {
			out.println("李梓健是她老公");
		}
		out.println("");
	}
	protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
		
		doPost(request,response);
	}
 
}

只用这两个

我先关掉tomcat,，然后先点击，运行hello.html，输入密码进去,然后再运行Loginservlet.java，就跳转405了

增加方法后

保存代码，然后页面刷新

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原文地址：https://blog.csdn.net/weixin_52634719/article/details/126727432