引入包
<script type="text/javascript" src="js/jquery-1.8.3.min.js"></script>
頁面代碼
光標離開時觸發條件
MessageServle
id和parame爲提交的參數名
<script type="text/javascript">
$(function(){
$("[id=ids]").blur(function(){
var idss=$(this).val();
$.post("MessageServlet",{"id":idss,"parame":"logintemp"},function(xt){
$("[id=ids]").next().html(xt);
});
});
})
</script>
後臺代碼
private void logintemp(HttpServletRequest request, HttpServletResponse response) {
String id=request.getParameter("id");
User user=null;
user=userdao.findById(Integer.parseInt(id));
System.out.println("登陸檢測:"+user);
String str="";
if(user==null){
str="該用戶名不存在";
}
response.setContentType("text/html;charset=utf-8");
try {
PrintWriter out=response.getWriter();
out.write(str);
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}