从数据库中检索动态添加的选择选项值到文本框onblur（）。我已将值动态添加到select选项中，但现在我想通过使用onBlur（）从select选项中检索该值。我可以保存数据，onblur（）我可以检索除select选项之外的所有数据。亲切的帮助:)）
<%@page import="java.sql.ResultSet"%>
<%@page import="java.sql.PreparedStatement"%>
<%@page import="java.sql.Connection"%>
<%@page import="java.sql.DriverManager"%>
<%@page import="java.sql.SQLException"%>
<%@page import="java.io.UnsupportedEncodingException"%>
<%@page contentType="text/html" pageEncoding="UTF-8"%>
<!DOCTYPE html>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Ledger Creation</title>
<link href="ledgercss.css" rel="stylesheet" type="text/css">
<script src="js/jquery-1.6.1.js"></script>
<script>
$(document).keypress(function(event) {
if (event.which == '13') {
event.preventDefault();
}
});
function getVal(newValue) {
var x = document.getElementById("code").value;
iframe1.location.href = "getldg.jsp?param=" + x;
}
</script>
<%!String varmsg = "";
String varmsg1 = "";
Connection conn = null;
String code, ename, kname, asstgrp, libgrp, rpord, schyn, trcd1, sumyn,
plord, plcd, blord, scyn = "";
public void connect() {
try {
Class.forName("com.mysql.jdbc.Driver");
conn = DriverManager.getConnection(
"jdbc:mysql://localhost:3306/ledger", "root", "");
varmsg = "connected";
} catch (Exception ex) {
varmsg = ex.getMessage();
}
}
public void gettxt(HttpServletRequest request) {
code = request.getParameter("code");
ename = request.getParameter("ename");
kname = request.getParameter("kname");
asstgrp = request.getParameter("asstgrp");
libgrp = request.getParameter("libgrp");
rpord = request.getParameter("rpord");
schyn = request.getParameter("schyn");
trcd1 = request.getParameter("trcd1");
sumyn = request.getParameter("sumyn");
plord = request.getParameter("plord");
plcd = request.getParameter("plcd");
blord = request.getParameter("blord");
scyn = request.getParameter("scyn");
}
public void insert(HttpServletRequest request){
String sql="insert into ldg (code,ename,kname,asstgrp,libgrp,rpord,schyn,trcd1,sumyn,plord,plcd,blord,scyn) "+
"values (?,?,?,?,?,?,?,?,?,?,?,?,?)";
try{
PreparedStatement stmt=conn.prepareStatement(sql);
stmt.setInt(1,Integer.parseInt(code));
stmt.setString(2, ename);
stmt.setString(3, kname);
stmt.setString(4, asstgrp);
stmt.setString(5, libgrp);
stmt.setInt(6,Integer.parseInt(rpord));
stmt.setString(7, schyn);
stmt.setInt(8,Integer.parseInt(trcd1));
stmt.setString(9, sumyn);
stmt.setInt(10,Integer.parseInt(plord));
stmt.setString(11, plcd);
stmt.setInt(12,Integer.parseInt(blord));
stmt.setString(13, scyn);
try{
request.setCharacterEncoding("UTF-8");
}catch(UnsupportedEncodingException ex){
}
stmt.executeUpdate();
varmsg="saved";
}catch(SQLException ex){
System.out.println(ex);
ex.printStackTrace();
System.out.println(ex.getMessage());
varmsg=ex.getMessage();
}
}%>
</head>
<body>
<%
if (request.getParameter("save") != null) {
connect();
gettxt(request);
insert(request);
}
%>
<%!String driverName = "com.mysql.jdbc.Driver";%>
<%!String url = "jdbc:mysql://localhost:3306/ledger";%>
<%!String user = "root";%>
<%!String psw = "";%>
<form method="post" name="form1">
<table cellspacing="15" width="800" frame="box" align="center">
<h1 align="center">Ledger</h1>
<tr>
<td>Code:</td>
<td><input type="number" style="width: 20%;" name="code"
id="code" onblur="getVal(this.value)"></td>
</tr>
<tr>
<td>Name:</td>
<td><input type="text" name="ename" style="width: 175%;">
</td>
</tr>
<tr>
<td>Kannada name:</td>
<td><input type="text" name="kname" style="width: 175%;">
</td>
</tr>
<tr>
<td>Asset Group:</td>
<td>
<%
Connection con = null;
PreparedStatement ps = null;
try {
Class.forName(driverName);
con = DriverManager.getConnection(url, user, psw);
String sql = "SELECT * FROM dropdown";
ps = con.prepareStatement(sql);
ResultSet rs = ps.executeQuery();
%> <select name="asstgrp">
<%
while (rs.next()) {
String fname = rs.getString("name1");
%>
<option value="<%=fname%>"><%=fname%></option>
<%
}
%>
</select> <%
} catch (SQLException sqe) {
out.println(sqe);
}
%>
</td>
</tr>
<tr>
<td>Liability Group:</td>
<td>
<%
try {
Class.forName(driverName);
con = DriverManager.getConnection(url, user, psw);
String sql = "SELECT * FROM dropdown1";
ps = con.prepareStatement(sql);
ResultSet rs = ps.executeQuery();
%> <select name="libgrp">
<%
while (rs.next()) {
String fname = rs.getString("entry");
%>
<option value="<%=fname%>"><%=fname%></option>
<%
}
%>
</select> <%
} catch (SQLException sqe) {
out.println(sqe);
}
%>
</td>
</tr>
<tr>
<td>RP Order:</td>
<td><input type="number" name="rpord"></td>
<td>Schedule in Balance Sheet:</td>
<td><select name="schyn">
<option value="yes" selected>YES</option>
<option value="no">NO</option>
</select></td>
</tr>
<tr>
<td>Trading Order:</td>
<td><input type="number" name="trcd1"></td>
<td>Summary in Cash Book:</td>
<td><select name="sumyn">
<option value="yes" selected>YES</option>
<option value="no">NO</option>
</select></td>
</tr>
<tr>
<td>P & L Order:</td>
<td><input type="number" name="plord"></td>
<td>P & L Account Head:</td>
<td><select name="plcd">
<option value="yes" selected>YES</option>
<option value="no">NO</option>
</select></td>
</tr>
<tr>
<td>Balance Sheet Order:</td>
<td><input type="number" name="blord"></td>
<td>Section:</td>
<td><select name="scyn">
<option value="yes" selected>YES</option>
<option value="no">NO</option>
</select></td>
</tr>
<tr>
<th colspan="2">
<button type="submit" name="save" value="save">Save</button>
<input type="button" name="delete" value="Delete"> </input>
</th>
</tr>
</table>
</div>
<iframe name="iframe1" hidden></iframe>
</form>
<%=varmsg%>
</body>
</html>