下面的代码有什么问题吗？我想使用以下 JSP 代码在数据库中搜索数据。
搜索.jsp
<%@ page import="java.sql.*" %>
<html>
<form>
<table>
<%
String value=request.getParameter("id");
int v=Integer.parseInt(value);
Class.forName("com.mysql.jdbc.Driver");
Connection conn = DriverManager.getConnection("jdbc:mysql://localhost:3306/employee ","root", "root");
Statement st=conn.createStatement();
ResultSet rs = st.executeQuery("select * from test where id="+v+"");
if(rs.next()){
%>
<tr><td>Name: </td><td<input type="text" value="<%=rs.getString("name")%>" > </td></tr>
<tr><td>Address: </td><td<input type="text" value="<%=rs.getString("address")%>" > </td></tr>
<tr><td>Contact No: </td><td<input type="text" value="<%=rs.getInt("contactNo")%>" > </td></tr>
<tr><td>Email: </td><td<input type="text" value="<%=rs.getString("email")%>" > </td></tr>
<%
}
%>
</table>
</form>
</html>
最佳答案
更改选择查询您的查询是错误的尝试:
"select * from test where id='"+v+"'"
一个简单的例子:
<%
String value=request.getParameter("student_id");;
int v=Integer.parseInt(value);
Class.forName("com.mysql.jdbc.Driver");
Connection conn = DriverManager.getConnection("jdbc:mysql://localhost:3306/test","root", "welcome");
Statement st=conn.createStatement();
ResultSet rs = st.executeQuery("select * from student where student_id='"+v+"'");
if(rs.next()){
%>
<tr><td>Name: </td><td><input type="text" value="<%=rs.getString("student_name")%>"/> </td></tr>
<%
}
%>
关于java - 使用JSP在数据库中搜索数据，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/24406047/