这是我的代码，我认为它的 Sql 字符串无法正常工作。我能够查看表格并单击编辑字段，但我只能更新第一行。我希望能够选择一行并根据其 id 对其进行编辑。
//Database View
<%@ page import="java.sql.ResultSet" %>
<%@ page import="java.sql.SQLException" %>
<%@ page import="java.sql.Statement" %>
<%@ page import="java.sql.Connection" %>
<%@ page import="java.sql.DriverManager" %>
<html>
<head>
<title>Inventory</title>
</head>
<body>
<%
Connection connect = null;
Statement s = null;
try {
Class.forName("com.mysql.jdbc.Driver");
connect = DriverManager.getConnection("jdbc:mysql://localhost/client", "rootroot", "rootroot");
s = connect.createStatement();
String sql = "SELECT * FROM client ORDER BY id ASC";
ResultSet rec = s.executeQuery(sql);
%>
<table width="600" border="1">
<tr>
<th width="91"> <div align="center">id </div></th>
<th width="198"> <div align="center">Email </div></th>
<th width="97"> <div align="center">CountryCode </div></th>
<th width="59"> <div align="center">Budget </div></th>
<th width="71"> <div align="center">Edit </div></th>
</tr>
<%while((rec!=null) && (rec.next())) { %>
<tr>
<td><div align="center"><%=rec.getString("id")%></div></td>
<td><%=rec.getString("first_name")%></td>
<td><%=rec.getString("last_name")%></td>
<td><div align="center"><%=rec.getString("blood_type")%></div></td>
<td align="right"><%=rec.getString("gender")%></td>
<td align="center"> <a href="editpage.jsp?id=<%=rec.getString("id")%>">Edit</a></td>
</tr>
<%}%>
</table>
<%
} catch (Exception e) {
// TODO Auto-generated catch block
out.println(e.getMessage());
e.printStackTrace();
}
try {
if(s!=null){
s.close();
connect.close();
}
} catch (SQLException e) {
// TODO Auto-generated catch block
out.println(e.getMessage());
e.printStackTrace();
}
%>
</body>
</html>
//Edit Page
<%@ page import="java.sql.ResultSet" %>
<%@ page import="java.sql.SQLException" %>
<%@ page import="java.sql.Statement" %>
<%@ page import="java.sql.Connection" %>
<%@ page import="java.sql.DriverManager" %>
<html>
<head>
<title>ThaiCreate.Com JSP Tutorial</title>
</head>
<body>
<%
Connection connect = null;
Statement s = null;
try {
Class.forName("com.mysql.jdbc.Driver");
connect = DriverManager.getConnection("jdbc:mysql://localhost/client", "rootroot", "rootroot");
s = connect.createStatement();
String sql ="SELECT * FROM client";
ResultSet rec = s.executeQuery(sql);
if(rec != null) {
rec.next();
%>
<form name="frmUpdate" method="post" action="SaveEdit.jsp?id=<%=rec.getString("id")%>">
Update Form
<table width="428" border="1">
<tr>
<th width="181">
<div align="left">Product ID </div></th>
<td width="231"><%=rec.getString("id")%></td>
</tr>
<tr>
<th width="181">
<div align="left">Name </div></th>
<td><input type="text" name="txtName" size="20" value="<%=rec.getString("first_name")%>"></td>
</tr>
<tr>
<th width="181">
<div align="left">Email </div></th>
<td><input type="text" name="txtEmail" size="20" value="<%=rec.getString("last_name")%>"></td>
</tr>
<tr>
<th width="181">
<div align="left">CountryCode </div></th>
<td><input type="text" name="txtCountryCode" size="2" value="<%=rec.getString("blood_type")%>"></td>
</tr>
<tr>
<th width="181">
<div align="left">Budget </div></th>
<td><input type="text" name="txtBudget" size="5" value="<%=rec.getString("gender")%>"></td>
</tr>
</table>
<input type="submit" value="Save">
</form>
<% }
} catch (Exception e) {
// TODO Auto-generated catch block
out.println(e.getMessage());
e.printStackTrace();
}
try {
if(s!=null){
s.close();
connect.close();
}
} catch (SQLException e) {
// TODO Auto-generated catch block
out.println(e.getMessage());
e.printStackTrace();
}
%>
</body>
</html>
// save page
<%@ page import="java.sql.ResultSet" %>
<%@ page import="java.sql.SQLException" %>
<%@ page import="java.sql.Statement" %>
<%@ page import="java.sql.Connection" %>
<%@ page import="java.sql.DriverManager" %>
<html>
<head>
<title>Hello World</title>
</head>
<body>
<%
Connection connect = null;
Statement s = null;
try {
Class.forName("com.mysql.jdbc.Driver");
connect = DriverManager.getConnection("jdbc:mysql://localhost/client", "rootroot", "rootroot");
s = connect.createStatement();
String strCustomerID = request.getParameter("id");
String strName = request.getParameter("txtName");
String strEmail = request.getParameter("txtEmail");
String strCountryCode = request.getParameter("txtCountryCode");
String strBudget = request.getParameter("txtBudget");
String sql = "UPDATE client " +
"SET first_name = '"+ strName + "' " +
", last_name = '"+ strEmail + "' " +
", blood_type = '"+ strCountryCode + "' " +
", gender = '"+ strBudget + "' " +
" WHERE id = '" + strCustomerID + "' ";
s.execute(sql);
out.println("Record Update Successfully");
} catch (Exception e) {
// TODO Auto-generated catch block
out.println(e.getMessage());
e.printStackTrace();
}
try {
if(s!=null){
s.close();
connect.close();
}
} catch (SQLException e) {
// TODO Auto-generated catch block
out.println(e.getMessage());
e.printStackTrace();
}
%>
</body>
</html>
最佳答案
请尝试 s.executeUpdate(sql);而不是 s.execute(sql);
关于java - sql语句在jsp中不起作用，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/33749160/