java的一些东西你懂的。-优快云博客

本文汇总了多种网页开发实用技巧，包括使用Dreamweaver进行批量替换、设置文本框宽度随输入内容变化、实现文件后缀名获取等功能，并介绍了如何通过JavaScript弹出对话框及MVC模式下Servlet的具体应用。

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在新窗口打开页面需这样设置超链接<a target="_blank">链接</a>
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dreamweav 可用作整个工程替换先在站点配置项目所在路径，然后按CTRL+F全部替换
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只读文本框<input type="text" name="txtNo" size="20" disabled>

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获取文件后缀名：(.jpg/.txt)
String ext=filename.substring(filename.lastIndexOf(".")).toLowerCase();
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使文本框根据输入的字数去增长
<!Doctype HTML PUBLIC "-//W3c//DTD Html 1.0 Transitional//EN">
<html>
<head>
<title>文本框宽度自动适应文本宽度 </title>
</head>
<script type="text/javascript">
function changeInputlength(cursor)
{
var getcount=document.getElementById("countFont");
var getText=document.getElementById("text");
getcount.innerHTML='<font>第'+(parseInt(getText.value.length)+1)+'个字符</font>';
cursor.size=getText.value.length+2;
}
</script>
<body>
请输入字符：<input type="text" size="3" id="text" onkeydown="changeInputlength(this);"/>
<span id="countFont"></span>
</body>
</html>
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复选框取值
String[] name=request.getParameterValues("name");//取值，字符串数组存值
String str=name[0].toString();
for(int i=1;i<name.length;i++){
str=str+","+name[i]; //转化为字符串，添加逗号
}
out.print("str=");
out.print(str);
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truncate table ap_member;删除表格记录ID从1开始
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confirm(" ")； JS确定与取消对话框
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MVC servelt方法

public class Test extends HttpServlet {
    public void doGet(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {

        String username = request.getParameter("username");
        request.setAttribute("username", username);
        request.getRequestDispatcher("b.jsp").forward(request, response);
    }
    public void doPost(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        this.doGet(request, response);
    }

}
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js脚本里探出框框
out.print("<script language='javascript'>");
out.print("window.location.href='/yourwin/puka.jsp?id=109';");
out.print("</script>");
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获取 out 对象 PrintWriter out = response.getWriter();

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层的显示和隐藏
document.getElementById("news").style.display="none/block";
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Oracle关于时间段的查询方法

if(!"".equals(beginDate)&&!"".equals(endDate))
{
sql+=" and regdate between to_date('"+beginDate+" 00:00:00','yyyy-mm-dd hh24:mi:ss') and to_date('"+endDate+" 23:59:59','yyyy-mm-dd hh24:mi:ss')";
}
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