10.21 数据库连接增加

首先做一个界面登录界面使用HTML结构和jsp文件判断输入格式是否符合源代码如下；

<%@ 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;
}
}

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;
}

// 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>

后面写 sertvlet函数来将数据传给库；

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;
}
}

后编写关于java 函数对象相应的构造函数

public class user {
private String id;
private String name;
private String password;
private String no;
private String mail;
private String xy;
private String sex;
private String x;
private String bj;
private String nf;
private String syd;
private String bz;

public String getId() {
return id;
}
public String getX() {
return x;
}
public void setX(String x) {
this.x = x;
}
public String getBj() {
return bj;
}
public void setBj(String bj) {
this.bj = bj;
}
public String getNf() {
return nf;
}
public void setNf(String nf) {
this.nf = nf;
}
public String getSyd() {
return syd;
}
public void setSyd(String syd) {
this.syd = syd;
}
public String getBz() {
return bz;
}
public void setBz(String bz) {
this.bz = bz;
}
public void setId(String id) {
this.id = id;
}
public String getPassword() {
return password;
}
public void setPassword(String password) {
this.password = password;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String getSex() {
return sex;
}
public void setSex(String sex) {
this.sex = sex;
}
public String getNo() {
return no;
}
public void setNo(String no) {
this.no = no;
}
public String getMail() {
return mail;
}
public void setMail(String mail) {
this.mail = mail;
}
public user(){}
public user(String name, String password) {
this.name = name;
this.password = password;
};

public user(String id, String name, String password, String no, String mail, String xy, String sex, String x, String bj,
String nf, String syd, String bz) {
super();
this.id = id;
this.name = name;
this.password = password;
this.no = no;
this.mail = mail;
this.xy = xy;
this.sex = sex;
this.x = x;
this.bj = bj;
this.nf = nf;
this.syd = syd;
this.bz = bz;
}
public String getXy() {
return xy;
}
public void setXy(String xy) {
this.xy = xy;
}
}

最后将jar包放入lib

在数据库中建立建立表

来源：https://www.cnblogs.com/kongfanbing/p/11716729.html

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大数据

html文件