📄 checkuser.jsp~2~
字号:
<%@ page contentType="text/html; charset=gb2312" language="java" import="java.sql.*" errorPage="" %><!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"><html><head><meta http-equiv="Content-Type" content="text/html; charset=gb2312"><title>检测帐户</title></head><body><jsp:useBean id="dbconn" scope="page" class="photo.DBConnection"/><jsp:useBean id="decode" scope="page" class="photo.DecodeQueryString"/><%try{String user_name= request.getQueryString();user_name = decode.getQueryStringValue(user_name, "account"); out.print(user_name); Connection conn=dbconn.getConnection(); Statement stmt = conn.createStatement(ResultSet.TYPE_SCROLL_INSENSITIVE,ResultSet.CONCUR_READ_ONLY);String sql="select * from users where user_name='"+user_name+"'"; //String sql="select * from users where user_name='aaa'"; ResultSet rs=stmt.executeQuery(sql); int i = 0; while(rs.next()) {i++;}if ((user_name==null)||(user_name=="")) { out.print("<title>检测帐号</title>"); out.print("<body bgcolor=#0099cc>"); out.print("<font color=white size=2> 页面错误!</font>"); } else { if (i!=0) { out.print("<title>检测帐号</title>"); out.print("<body bgcolor=#0099cc>"); out.print("<font color=white size=2> 帐户已存在</font>"); } else { out.print("<title>检测帐号</title>"); out.print("<body bgcolor=#0099cc>"); out.print("<font color=white size=2> 帐户可以使用</font>"); } }}catch(Exception e){e.printStackTrace();}%></body></html>⌨️ 快捷键说明
复制代码
Ctrl + C
搜索代码
Ctrl + F
全屏模式
F11
切换主题
Ctrl + Shift + D
显示快捷键
?
增大字号
Ctrl + =
减小字号
Ctrl + -