Data retrieve from mysql database
Hi sir,
please give some example of jsp code for retrieving mysql database values in multiple dropdown list. if we change a value in a dropdown its related value must be shown in the adjacent text field using struts and hibernate.
Regards
Subrat
View Answers
June 14, 2012 at 12:22 PM
The given code retrieves the employee name in the dropdown. When the user selects any name from the dropdown, related data will get displayed on the textboxes. Here we have used Ajax.
1)selectname.jsp:
<html>
<head>
<script type="text/javascript">
function showEmp(emp_value){
if(document.getElementById("address").value!="-1"){
xmlHttp=GetXmlHttpObject()
if (xmlHttp==null){
alert ("Browser does not support HTTP Request")
return
}
var url="getvalue.jsp"
url=url+"?name="+emp_value
xmlHttp.onreadystatechange=stateChanged
xmlHttp.open("GET",url,true)
xmlHttp.send(null)
}
else{
alert("Please Select Employee Name");
}
}
function stateChanged(){
document.getElementById("email").value ="";
document.getElementById("address").value ="";
if (xmlHttp.readyState==4 || xmlHttp.readyState=="complete") {
var showdata = xmlHttp.responseText;
var strar = showdata.split(":");
if(strar.length==1){
document.getElementById("address").focus();
alert("Please Select Employee Name");
document.getElementById("email").value =" ";
document.getElementById("address").value =" ";
}
else if(strar.length>1) {
var strname = strar[1];
document.getElementById("address").value= strar[1];
document.getElementById("email").value= strar[2];
}
}
}
function GetXmlHttpObject(){
var xmlHttp=null;
try{
xmlHttp=new XMLHttpRequest();
}
catch (e) {
try {
xmlHttp=new ActiveXObject("Msxml2.XMLHTTP");
}
catch (e) {
xmlHttp=new ActiveXObject("Microsoft.XMLHTTP");
}
}
return xmlHttp;
}
</script>
</head>
<body>
<form name="employee">
<br><br>
<table border="0" width="400px" align="center" bgcolor="#CDFFFF">
<div id="mydiv"></div>
<tr><td><b>Select Employee Name</b></td><td>
<select name="name" onchange="showEmp(this.value);">
<option value="-1">Select</option>
<option value="Angelina">Angelina</option>
<option value="Martina">Martina</option>
<option value="Julia">Julia</option>
<option value="Angel">Angel</option>
</select>
</td></tr>
<tr><td ><b>Employee Address:</b></td><td>
<input type="text" name="address" id="address" value=""></td></tr>
<tr><td><b>Employee Email:</b></td><td>
<input type="text" name="email" id="email" value=""></td></tr>
</table>
</form>
<table border="0" width="100%" align="center">
<br>
<br>
</table>
</body>
</html>
2)getvalue.jsp:
<%@page import="java.sql.*"%>
<%
String name = request.getParameter("name").toString();
String data="";
Connection conn = null;
String url = "jdbc:mysql://localhost:3306/";
String dbName = "test";
String driver = "com.mysql.jdbc.Driver";
String userName = "root";
String password = "root";
int sumcount=0;
Statement st;
try {
Class.forName(driver).newInstance();
conn = DriverManager.getConnection(url+dbName,userName,password);
String query = "select * from employee where name='"+name+"'";
st = conn.createStatement();
ResultSet rs = st.executeQuery(query);
while(rs.next())
{
data = ":" + rs.getString("address") +":"+ rs.getString("email");
}
out.println(data);
}
catch (Exception e) {
e.printStackTrace();
}
%>
June 14, 2012 at 12:23 PM
continue....
3)For the above code, we have created following table:
CREATE TABLE `employee` (
`id` bigint(255) default NULL,
`name` varchar(255) default NULL,
`address` varchar(255) default NULL,
`contactNo` int(255) default NULL,
`email` varchar(255) default NULL
)
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