Servlet添加用户到数据库

创建一个servlet包，里面写java类：

package servlets;

import java.io.IOException;
import java.io.PrintWriter;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.PreparedStatement;

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

@WebServlet("/tianjia")//注解配置，当jsp页面提交的时候，action属性的找这个注解配置的名字
public class register extends HttpServlet {
	@Override
	protected void doPost(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
		// TODO Auto-generated method stub
		
		//解决乱码问题            req相当于request对象使用
		req.setCharacterEncoding("UTF-8");
		String acc=req.getParameter("name");
		String pwd=req.getParameter("password");
	    try {
			Class.forName("com.mysql.jdbc.Driver");//加载驱动
			//连接mysql数据库
			Connection con=DriverManager.getConnection("jdbc:mysql://localhost:3306/student?useUnicode=true&characterEncoding=utf-8","root","123456");
			String s1="insert into users values(?,?)";
			PreparedStatement ps=con.prepareStatement(s1);//创建PreparedStatement对象执行sql语句
			ps.setString(1, acc);
			ps.setString(2, pwd);
			int i=ps.executeUpdate();
			if(i==1){
				resp.sendRedirect("sucess.jsp");
			}
		} catch (Exception e) {
			e.printStackTrace();
		}
	}
}

创建添加用户信息的页面，register.jsp：

<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%>
<%
String path = request.getContextPath();
String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
%>

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
  <head>
    <base href="<%=basePath%>">
    
    <title>My JSP 'register.jsp' starting page</title>
    
	<meta http-equiv="pragma" content="no-cache">
	<meta http-equiv="cache-control" content="no-cache">
	<meta http-equiv="expires" content="0">    
	<meta http-equiv="keywords" content="keyword1,keyword2,keyword3">
	<meta http-equiv="description" content="This is my page">
	<!--
	<link rel="stylesheet" type="text/css" href="styles.css">
	-->

  </head>
  
  <body>
    <form action="tianjia" method="post">
                         请输入姓名：<input type="text" name="name"><br>
                         请输入密码：<input type="text" name="password"><br>
            <input type="submit" value="注册">
                      
    </form>
  </body>
</html>

创建添加成功的提示页面，sucess.jsp：

<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
<%
String path = request.getContextPath();
String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
%>

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
  <head>
    <base href="<%=basePath%>">
    
    <title>My JSP 'sucess.jsp' starting page</title>
    
	<meta http-equiv="pragma" content="no-cache">
	<meta http-equiv="cache-control" content="no-cache">
	<meta http-equiv="expires" content="0">    
	<meta http-equiv="keywords" content="keyword1,keyword2,keyword3">
	<meta http-equiv="description" content="This is my page">
	<!--
	<link rel="stylesheet" type="text/css" href="styles.css">
	-->

  </head>
  
  <body>
    注册成功！ <br>
  </body>
</html>

结果：

输入信息：

数据库开始的表：

点击注册以后：

Servlet添加用户到数据库

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