UC知道javascript alert 问题
来源：百度知道 编辑：UC知道 时间：2024/05/09 16:34:31
<%@page import="java.io.*"%>
<%@page import="java.util.*"%>
<%@page import="java.sql.*"%>
<%@page language="java" contentType="text/html" pageEncoding="UTF-8"%>
<html>
<% String student_no=request.getParameter("student_no");%>
<%
try
{
Class.forName("org.gjt.mm.mysql.Driver").newInstance();
Connection con=DriverManager.getConnection("jdbc:mysql://localhost/Fees","root","123456");
Statement stmt=con.createStatement();
ResultSet rs=stmt.executeQuery("select student_no,student_chinesename,student_engfirstname,student_englastname,student_status from student where student_no='"+student_no+"'");
out.println("<table border=0 width=400");
if(rs.next())
{
String col1=rs.getString(1);
String col2
<%@page import="java.util.*"%>
<%@page import="java.sql.*"%>
<%@page language="java" contentType="text/html" pageEncoding="UTF-8"%>
<html>
<% String student_no=request.getParameter("student_no");%>
<%
try
{
Class.forName("org.gjt.mm.mysql.Driver").newInstance();
Connection con=DriverManager.getConnection("jdbc:mysql://localhost/Fees","root","123456");
Statement stmt=con.createStatement();
ResultSet rs=stmt.executeQuery("select student_no,student_chinesename,student_engfirstname,student_englastname,student_status from student where student_no='"+student_no+"'");
out.println("<table border=0 width=400");
if(rs.next())
{
String col1=rs.getString(1);
String col2
else
{
%>
<script language="javascript"> alert("请输入主设备号！");</script>
<%
}
不晓得楼上的是否可以用!如果觉得这样不行,你就写到JS中去做判断.然后返回出来
else
{
out.println("<script> alert('请输入主设备号！')</script>;");
}
else
{
out.println("<script language='javascript'> alert('请输入主设备号！'); </script>");
}
上面的方法，应该都可行呀
你是不是直接直else里了?