每日总结 4.23

今天进行代码的优化问题，对查询的语句进行更改。

进行金额的保留小数。

out.print(String.format("%.2f", jiage));

<!DOCTYPE HTML>
<html>
  <head>
    <title>登录界面</title>
    <meta charset="utf-8">
    <meta http-equiv="pragma" content="no-cache">
    <meta http-equiv="cache-control" content="no-cache">
    <meta http-equiv="expires" content="0">    
    <meta http-equiv="keywords" content="keyword1,keyword2,keyword3">
    <meta http-equiv="description" content="This is my page">
<link rel="stylesheet" type="text/css" href="css.css" />
  </head>
  <body>
          <form name="form1" action="" method="post">
              <h1>供货商登录</h1>
            <input class=input_1 id=username size=15  name="username"  placeholder=用户名><br />
              <input class=input_1 id=password type=text size=15 name="password" placeholder=密码><br />

               <br/>
            <input class=input_3 type="button" onclick="login()" value="登录" />
            <input class=input_3 type="button"  onclick=document.form1.reset() value="重置" /> 
            <input class=input_3 type="button"  onclick="zhucea()" value="注册" /> 
         </form>
        <script type="text/javascript" src="script.js"></script>        
  </body>
</html>