使用Java將數據插入表中
[英]Inserting data into table using java
問題描述
我想在表格中插入與用戶相關的信息，創建表格時我使用了下拉列表。我的數據庫中有兩個表格（用戶和部門）。我想顯示所有部門的名稱下拉列表中表部門的名稱（以便用戶選擇該部門名稱）並插入表用戶中。 我應該怎么做？
文件名-c_user.jsp
<%@page contentType="text/html" pageEncoding="UTF-8"%>
<!DOCTYPE html>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>create</title>
<link rel="stylesheet" type="text/css" href="style.css" />
</head>
<body>
<h1>Create User</h1>
<br>
<h2><a href='logout.jsp'>Log out</a></h2>
<br>
<h3><a href='success.jsp'>Go Back</a></h3>
<form method="post" action="registration.jsp">
<center>
<table border="1" width="30%" cellpadding="3">
<thead>
<tr>
<th colspan="2">Login Here</th>
</tr>
</thead>
<tbody>
<tr>
<td>User Name :</td>
<td><input type="text" name="uname" value="" /></td>
</tr>
<tr>
<td>User Id :</td>
<td><input type="text" name="uid" value="" /></td>
</tr>
<tr>
<td>Department :</td>
<td><select name="departments">
<option></option>
<option></option>
</select></td>
</tr>
<tr>
<td>Email Id :</td>
<td><input type="text" name="email" value="" /></td>
</tr>
<tr>
<td>Mobile No. :</td>
<td><input type="text" name="mobile" value="" /></td>
</tr>
<tr>
<td>Password :</td>
<td><input type="password" name="pass" value="" /></td>
</tr>
<tr>
<td><input type="submit" value="Login" /></td>
<td><input type="reset" value="Reset" /></td>
</tr>
</tbody>
</table>
</center>
</form>
</body>
</html>
文件名-registration.jsp
<%@page contentType="text/html" pageEncoding="UTF-8"%>
<!DOCTYPE html>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>JSP Page</title>
</head>
<body>
<%@ page import ="java.sql.*" %>
<%
String user = request.getParameter("uname");
String id = request.getParameter("uid");
String email = request.getParameter("email");
String mobile = request.getParameter("mobile");
String pwd = request.getParameter("pass");
String department="";
Class.forName("com.mysql.jdbc.Driver");
Connection con = DriverManager.getConnection("jdbc:mysql://localhost:3306/login",
"root", "root");
Statement st = con.createStatement();
//ResultSet rs;
int i = st.executeUpdate("insert into users(uname, id, department, email, mobile, pass) values ('" + user + "','" + id + "','" + department + "','" + email + "','" + mobile + "','" + pwd + "')");
if (i > 0) {
//session.setAttribute("userid", user);
response.sendRedirect("welcome.jsp");
// out.print("Registration Successfull!"+"<a href='index.jsp'>Go to Login</a>");
} else {
response.sendRedirect("c_user.jsp");
}
%>
</body>
</html>
3 個解決方案
解決方案1
2 2016-06-02 08:19:48
<select>
<%
ResultSet rs1=state.executeQuery(" select department from your table");
while(rs.next()){
%>
<option value="<%rs.getString(1)"%>><%rs.getString(1)"%></option>
<%}%>
</select>
try this code
解決方案2
0 2016-06-02 08:13:47
使用ajax調用在ui中顯示部門名稱，並將合適的部門名稱插入到用戶表中
解決方案3
0 已采納 2016-06-02 10:01:10
首先改變列的department以departmentid在users表，使外鍵users表，並利用department表作為參考表
然后只需在頁面c_user.jsp上執行此代碼
<%@page contentType="text/html" pageEncoding="UTF-8"%>
<!DOCTYPE html>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>create</title>
<link rel="stylesheet" type="text/css" href="style.css" />
</head>
<body>
<h1>Create User</h1>
<br>
<h2><a href='logout.jsp'>Log out</a></h2>
<br>
<h3><a href='success.jsp'>Go Back</a></h3>
<form method="post" action="registration.jsp">
<center>
<table border="1" width="30%" cellpadding="3">
<thead>
<tr>
<th colspan="2">Login Here</th>
</tr>
</thead>
<tbody>
<tr>
<td>User Name :</td>
<td><input type="text" name="uname" value="" /></td>
</tr>
<tr>
<td>User Id :</td>
<td><input type="text" name="uid" value="" /></td>
</tr>
<tr>
<td>Department :</td>
<td><select name="departments">
<%try{
String sql="select * from department";
Class.forName("com.mysql.jdbc.Driver");
Connection con = DriverManager.getConnection("jdbc:mysql://localhost:3306/login",
"root", "root");
Statement st = con.createStatement();
ResultSet rs=st.executeQuery(sql);
while(rs.next()){
%>
<option value="<%=rs.getInt("departmentid")%>"><%=rs.getString("departmentname")%></option>
<%}
rs.close();
st.close();
con.close();
}catch(Exception e){
e.printStackTrace();
}%>
</select></td>
</tr>
<tr>
<td>Email Id :</td>
<td><input type="text" name="email" value="" /></td>
</tr>
<tr>
<td>Mobile No. :</td>
<td><input type="text" name="mobile" value="" /></td>
</tr>
<tr>
<td>Password :</td>
<td><input type="password" name="pass" value="" /></td>
</tr>
<tr>
<td><input type="submit" value="Login" /></td>
<td><input type="reset" value="Reset" /></td>
</tr>
</tbody>
</table>
</center>
</form>
</body>
</html>
然后，在提交后，此departmentid將存儲在users表中，不要錯過對諸如registration.jsp頁面中的插入查詢的更改查詢的更改查詢
insert into users(uname, id, departmentid, email, mobile, pass) values ('" + user + "','" + id + "','" + departmentid + "','" + email + "','" + mobile + "','" + pwd + "')
在Java中使用Apache Spark將數據插入表中
聲明:本站的技術帖子網頁，遵循CC BY-SA 4.0協議，如果您需要轉載，請注明本站網址或者原文地址。任何問題請咨詢:yoyou2525@163.com.