JavaWeb之Servlet-注册页面

Servlet-注册页面

环境准备：

本文所用到环境如下：

软件：Eclipse(2018)

服务器：Tomcat 9

在index.jsp添加相关的代码

<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>








用户注册

    

    

    

    
登录名：
 
    
 (可包含a-z、0-9和下划线)
    
    

    
密码：
 
    
 (至少包含6个字符)
    
    

    
再次输入密码：
 
    

    
    

    
电子邮箱：
 
    
 (必须包含@字符)
    
    

    
性别：
 
    
男
        女
    
     
头像：
 
    

    
     
爱好：
 
    

    

   	   运动
       聊天
       玩游戏
      
    
    
   
     
     
喜欢的城市：
 
    

         
         [请选择]
         北海
         海南
         重庆
         杭州
         深圳
         成都
     	 
    
    
    
    

    

       
       
     
     
    

效果为：

Login_Servlet.java代码

package onlyxiu_ceshi.com;

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

/**
 * Servlet implementation class Login_Servlet
 */
@WebServlet("/Login_Servlet")
public class Login_Servlet extends HttpServlet {
	private static final long serialVersionUID = 1L;
       
    /**
     * @see HttpServlet#HttpServlet()
     */
    public Login_Servlet() {
        super();
        // TODO Auto-generated constructor stub
    }

	/**
	 * @see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse response)
	 */
	protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
		// TODO Auto-generated method stub
//		response.getWriter().append("Served at: ").append(request.getContextPath());
		
		
		 request.setCharacterEncoding("UTF-8");//处理乱码问题
	        response.setCharacterEncoding("UTF-8");//处理乱码问题
	        //获得用户在register界面提交的数据
	        String username = request.getParameter("username");
	        String password = request.getParameter("password");
	        String confirmPassword = request.getParameter("confirmPassword");
	        String gender = request.getParameter("gender");
	        String youxaing = request.getParameter("youxaing");
	        String bfile = request.getParameter("bfile");
	        String hobby  = request.getParameter("hobby");
	        String selectList = request.getParameter("selectList");
	        //判断密码是否正确
	        if (password.equals(confirmPassword)){//如果密码相同，重定向到成功界面
	            HttpSession session = request.getSession();//获取session
	            session.setAttribute("session_username",username);
	            session.setAttribute("session_password",password);
	            session.setAttribute("session_gender",gender);
	            session.setAttribute("session_youxaing",youxaing);
	            session.setAttribute("session_bfile",bfile);
	            session.setAttribute("session_hobby", hobby);
	            session.setAttribute("session_selectList",selectList);
	           
	            request.getRequestDispatcher("SuccessServlet").forward(request, response);
	          //  response.sendRedirect("register_login.jsp");//重定向到成功页面
	        }else {//如果密码不同，通知用户密码输入不一样
	            request.getSession().setAttribute("passwordError","yes");
	            request.getRequestDispatcher("ErrorServlet").forward(request, response);
//	            response.sendRedirect("register.jsp");//重定向到登陆界面
	        }
	    }
	

	/**
	 * @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse response)
	 */
	protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
		// TODO Auto-generated method stub
		doGet(request, response);
	}

}

配置web.xml

<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://xmlns.jcp.org/xml/ns/javaee" xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_3_1.xsd" id="WebApp_ID" version="3.1">
  <display-name>onlyxiu_ceshidisplay-name>
  <welcome-file-list>
    <welcome-file>index.htmlwelcome-file>
    <welcome-file>index.htmwelcome-file>
    <welcome-file>index.jspwelcome-file>
    <welcome-file>default.htmlwelcome-file>
    <welcome-file>default.htmwelcome-file>
    <welcome-file>default.jspwelcome-file>
  welcome-file-list>
  
  <servlet>
    <servlet-name>Login_Servletservlet-name>
    <servlet-class>onlyxiu_ceshi.comservlet-class>
  servlet>
  <servlet-mapping>
    <servlet-name>Login_Servletservlet-name>
    
    <url-pattern>/onlyxiu_ceshi/Login_Servleturl-pattern>// /项目名/类名
  servlet-mapping>
  
web-app>

ErrorServlet.java的代码

package onlyxiu_ceshi.com;

import java.io.IOException;
import java.io.PrintWriter;
import java.util.Arrays;

import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;

/**
 * Servlet implementation class ErrorServlet
 */
@WebServlet("/ErrorServlet")
public class ErrorServlet extends HttpServlet {
	private static final long serialVersionUID = 1L;
       
    /**
     * @see HttpServlet#HttpServlet()
     */
    public ErrorServlet() {
        super();
        // TODO Auto-generated constructor stub
    }

	/**
	 * @see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse response)
	 */
	protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
		// TODO Auto-generated method stub
//		response.getWriter().append("Served at: ").append(request.getContextPath());
		
		response.setHeader("Content-type","text/html; charset=UTF-8");
		String username = request.getParameter("username");
		String password = request.getParameter("password");
		String gender = request.getParameter("gender");
		String youxaing = request.getParameter("youxaing");
		String bfile = request.getParameter("bfile");
		String hobby = request.getParameter("hobby");
		String selectList = request.getParameter("selectList");
		PrintWriter out = response.getWriter();
		out.print("
用户注册信息
");
		out.print("用户名:\n"+username+"
");
		out.print("密码:"+password+"
");
		out.print("电子邮箱："+youxaing+"
");
		out.print("性别:"+gender+"
");
		out.print("头像："+bfile+"
");
		out.print("爱好："+hobby+"
");
		out.print("喜欢的城市："+selectList+"
");
//		out.print("登陆失败");
		out.close();
	}

	/**
	 * @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse response)
	 */
	protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
		// TODO Auto-generated method stub
//		doGet(request, response);
	}

}

SuccessServlet.java

package onlyxiu_ceshi.com;

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;
import javax.servlet.http.HttpSession;

/**
 * Servlet implementation class SuccessServlet
 */
@WebServlet("/SuccessServlet")
public class SuccessServlet extends HttpServlet {
	private static final long serialVersionUID = 1L;
       
    /**
     * @see HttpServlet#HttpServlet()
     */
    public SuccessServlet() {
        super();
        // TODO Auto-generated constructor stub
    }

	/**
	 * @see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse response)
	 */
	protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
		// TODO Auto-generated method stub
//		response.getWriter().append("Served at: ").append(request.getContextPath());
		response.setHeader("Content-type","text/html; charset=UTF-8");
		String username = request.getParameter("username");
		String password = request.getParameter("password");
		String gender = request.getParameter("gender");
		String youxaing = request.getParameter("youxaing");
		String bfile = request.getParameter("bfile");
		String hobby = request.getParameter("hobby");
		String selectList = request.getParameter("selectList");
		PrintWriter out = response.getWriter();
		out.print("
用户注册信息
");
		out.print("用户名:\n"+username+"
");
		out.print("密码:"+password+"
");
		out.print("电子邮箱："+youxaing+"
");
		out.print("性别:"+gender+"
");
		out.print("头像："+bfile+"
");
		out.print("爱好："+hobby+"
");
		out.print("喜欢的城市："+selectList+"
");
//		out.println("登陆成功");
		out.close();
	}

	/**
	 * @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse response)
	 */
	protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
		// TODO Auto-generated method stub
//		doGet(request, response);
	}

}