package com.util; import java.sql.Connection; import java.sql.DriverManager; import java.sql.PreparedStatement; import java.sql.ResultSet; import java.sql.SQLException; import java.sql.Statement; /* * 鏁版嵁搴撹繛鎺ュ伐鍏� */ public class DBUtil { public static String db_url = "jdbc:mysql://localhost:3306/test?useSSL=false&useUnicode=true&characterEncoding=UTF-8"; public static String db_user = "root"; public static String db_pass = "123"; public static Connection getConn () { Connection conn = null; try { Class.forName("com.mysql.jdbc.Driver");//鍔犺浇椹卞姩 conn = DriverManager.getConnection(db_url, db_user, db_pass); } catch (Exception e) { e.printStackTrace(); } return conn; } /*10鍏抽棴杩炴帴*/ public static void close (Statement state, Connection conn) { if (state != null) { try { state.close(); } catch (SQLException e) { e.printStackTrace(); } } if (conn != null) { try { conn.close(); } catch (SQLException e) { e.printStackTrace(); } } } public static void close (ResultSet rs, Statement state, Connection conn) { if (rs != null) { try { rs.close(); } catch (SQLException e) { e.printStackTrace(); } } if (state != null) { try { state.close(); } catch (SQLException e) { e.printStackTrace(); } } if (conn != null) { try { conn.close(); } catch (SQLException e) { e.printStackTrace(); } } } public static void main(String[] args) throws SQLException { Connection conn = getConn(); PreparedStatement pstmt = null; ResultSet rs = null; String sql ="select * from user"; pstmt = conn.prepareStatement(sql); rs = pstmt.executeQuery(); if(rs.next()){ System.out.println("绌�"); }else{ System.out.println("涓嶇┖"); } } }
package com.dao; import java.sql.Connection; import java.sql.ResultSet; import java.sql.SQLException; import java.sql.Statement; import com.entry.user; import com.util.DBUtil; public class userDao { //娣诲姞 public boolean add(user user) { String sql = "insert into user2(id,password,sex,name,no,mail,xy,x,bj,nf,syd,bz) " + "values('" + user.getId() + "','" + user.getPassword() + "','" + user.getSex() + "','" + user.getName() + "','" + user.getNo() + "','" + user.getMail() + "','" + user.getXy() + "','" + user.getX() + "','" + user.getBj() + "','" + user.getNf() + "','" + user.getSyd() + "','" + user.getBz() + "')"; //鍒涘缓鏁版嵁搴撻摼鎺� Connection conn = DBUtil.getConn(); Statement state = null; boolean f = false; int a = 0; try { state = conn.createStatement(); state.executeUpdate(sql); } catch (Exception e) { e.printStackTrace(); } finally { //鍏抽棴杩炴帴 DBUtil.close(state, conn); } if (a > 0) { f = true; } return f; } /* * 楠岃瘉鍚嶇О鏄惁鍞竴 * true --- 涓嶅敮涓� */ public boolean id(String id) { boolean f = false; String sql = "select id from user2 where name = '" + id + "'"; //c鍒涘缓鏁版嵁搴撹繛鎺� Connection conn = DBUtil.getConn(); Statement state = null; ResultSet rs = null; try { state = conn.createStatement(); rs = state.executeQuery(sql); while (rs.next()) { f = true; } } catch (SQLException e) { e.printStackTrace(); } finally { DBUtil.close(rs, state, conn); } return f; } }
package com.service; import com.dao.userDao; import com.entry.user; public class userservice { userDao cDao = new userDao(); /*娣诲姞*/ public boolean add(user user) { boolean f = false; if(!cDao.id(user.getId())) { cDao.add(user); f = true; } return f; } }
<%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%> <!DOCTYPE html> <html> <head> <title>Insert title here</title> <meta charset="UTF-8"> <title>注册页面</title> </head> <body> <% Object message = request.getAttribute("message"); if(message!=null && !"".equals(message)){ %> <script type="text/javascript"> alert("<%=request.getAttribute("message")%>"); </script> <%} %> <div align="center"> <h6 style="color: black;">注册</h6> <form name = "form1" action="AddServlet?method=add" method="post" onsubmit="return check_submit()"> <table> <tr> <td>登录账号</td> <td colspan="2"> <input type="text" id="id" name="id" maxlength="12" onblur="blur_id()" onfocus="focus_id()"/></td> <td width="300"><div id="result"></td> </tr> <tr> <td>登录密码</td> <td colspan="2"> <input type="password" id="password" name="password" onblur="blur_pass()" onfocus="focus_pass()" /></td> <td width="300"><div id="result1"></td> </tr> <tr> <td>性别:</td> <td colspan="2"> <select name="sex"id="sex" > <option value="男" >男</option> <option value="女" >女</option> </select></td> </tr> <tr> <td>姓名</td> <td colspan="2"><input type="text" id="name" name="name" /></td> </tr> <tr> <td>学号</td> <td colspan="2"><input style="ime-mode:Disabled" maxlength="8" type="text" id="no" name="no" onblur="blur_phone()" onfocus="focus_phone()"/></td> <td width="300"><div id="result_name"></td> </tr><tr> <td>电子邮件</td> <td colspan="2"><input type="email" id="mail" name="mail" ></td> </tr> <tr> <td>所在学院</td> <td colspan="2"><input type="text" id="xy" name="xy" ></td> </tr> <tr> <td>所在系</td> <td colspan="2"><input type="text" id="x" name="x" ></td> </tr> <tr> <td>所在班级</td> <td colspan="2"><input type="text" id="bj" name="bj" ></td> </tr> <tr> <td>入学年份(届):</td> <td colspan="2"> <select name="nf"id="nf" > <option value="2017" >2017</option> <option value="2018" >2018</option> </select></td> </tr> <tr> <td>生源地:</td> <td colspan="2"><input type="text" id="syd" name="syd" ></td> </tr> <tr> <td>备注:</td> <td colspan="2"><input type="text" id="bz" name="bz" ></td> </tr> <tr> <td colspan="3"> <button type="submit" class="b">保 存</button> <button type="reset" class="b">重 置</button></td> </tr> </table> </form> </div> <script type="text/javascript"> /* 表单验证 */ var flag = false; // flag 如果为true(即用户名合法)就允许表单提交, 如果为false(即用户名不合法)阻止提交 function focus_pass() { var nameObj = document.getElementById("result1"); nameObj.innerHTML = "由八位以上字符和数字组成"; nameObj.style.color="#999"; } function blur_pass() { var nameObj = document.getElementById("result1"); // 判断用户名是否合法 var str2 = check_user_pass(document.form1.password.value); nameObj.style.color="red"; if ("密码合法" == str2) { flag = true; nameObj.innerHTML = str2; } else { nameObj.innerHTML = str2; } } function check_user_pass(str) { var str2 = "密码合法"; if ("" == str) { str2 = "密码为空"; return str2; } else if (str.length<8) { str2 = "密码应为8位组成"; return str2; } else if (!check_word(str)) { str2 = "未含有英文字符"; return str2; } return str2; } function focus_id() { var nameObj = document.getElementById("result"); nameObj.innerHTML = "由六到十二英文字符和数字组成"; nameObj.style.color="#999"; } function blur_id() { var nameObj = document.getElementById("result"); // 判断用户名是否合法 var str2 = check_user_id(document.form1.id.value); nameObj.style.color="red"; if ("用户名合法" == str2) { flag = true; nameObj.innerHTML = str2; } else { nameObj.innerHTML = str2; } } function check_user_id(str) { var str2 = "用户名合法"; if ("" == str) { str2 = "用户名号为空"; return str2; } else if ((str.length<=4)||(str.length>=12)) { str2 = "用户名应是六到十二位组成"; return str2; } else if (!check_word(str)) { str2 = "未含有英文字符"; return str2; } else if(!check_firstword(str)) { str2 = "必须以英文字母开头"; return str2; } return str2; } // 当鼠标聚焦于用户名 function focus_phone() { // 找到后面的div, id = result_name var nameObj = document.getElementById("result_name"); nameObj.innerHTML = "学号为8位数字且以2018开头"; nameObj.style.color="#999"; } // 当鼠标不聚焦于用户名input function blur_phone() { // 找到id=result_name的div var nameObj = document.getElementById("result_name"); // 判断用户名是否合法 var str2 = check_user_name(document.form1.no.value); nameObj.style.color="red"; if ("手机号合法" == str2) { flag = true; nameObj.innerHTML = str2; } else { nameObj.innerHTML = str2; } } // 检查用户名是否合法 合法就返回"该用户名合法" function check_user_name(str) { var str2 = "学号合法"; if ("" == str) { str2 = "学号为空"; return str2; } else if (str.length!=8) { str2 = "学号必须为8位"; return str2; } else if (check_other_char(str)) { str2 = "不能含有特殊字符"; return str2; } return str2; } function check_firstword(str) { var arr = ["a", "b", "c", "d", "e", "f", "g", "h","i","j", "k", "l", "m", "n", "o", "p", "q","r", "s", "t", "u", "v", "w", "x", "y","z","A", "B", "C", "D", "E", "F", "G", "H","I","J", "K", "L", "M", "N", "O", "P", "Q","R","S", "T", "U", "V", "W", "X", "Y", "Z"]; for (var i = 0; i < arr.length; i++) { if (arr[i] == str.charAt(0)) { return true; } } return false; } function check_word(str) { var arr = ["a", "b", "c", "d", "e", "f", "g", "h","i","j", "k", "l", "m", "n", "o", "p", "q","r", "s", "t", "u", "v", "w", "x", "y","z","A", "B", "C", "D", "E", "F", "G", "H","I","J", "K", "L", "M", "N", "O", "P", "Q","R","S", "T", "U", "V", "W", "X", "Y", "Z"]; for (var i = 0; i < arr.length; i++) { for (var j = 0; j < str.length; j++) { if (arr[i] == str.charAt(j)) { return true; } } } return false; } // 验证用户名是否含有特殊字符 function check_other_char(str) { var arr = ["&", "\\", "/", "*", ">", "<", "@", "!"]; for (var i = 0; i < arr.length; i++) { for (var j = 0; j < str.length; j++) { if (arr[i] == str.charAt(j)) { return true; } } } return false; } // 根据验证结果确认是否提交 function check_submit() { if (flag == false) { return false; } return true; } </script> </head> </body> </html>