form表单提交后,后台怎么处理数据
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推荐于2017-11-23
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java中使用request.getParameter("参数名")方法来获取form表单传过来的数据。
具体代码如下:
jsp代码:
<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<title>Demo</title>
<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">
</head>
<body>
<form action="demoServlet" method="post">
<table>
<tr>
<td>
<input type="text" name="name" id="name"/>
</td>
</tr>
<tr>
<td>
<input type="submit" value="提交"/>
</td>
</tr>
</table>
</form>
</body>
</html>
Servlet代码:
public class DemoServlet extends HttpServlet {
public void doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
String name = request.getParameter("name");
System.out.println(name);
}
public void doPost(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
doGet(request, response);
}
}
其中DemoServlet是一个继承了HttpServlet类的Servlet类,当表单提交(点击提交按钮)时,回去调用这个类的doPost()方法,执行对应的代码,通过request.getParameter("name")来获取表单的值。
具体代码如下:
jsp代码:
<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<title>Demo</title>
<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">
</head>
<body>
<form action="demoServlet" method="post">
<table>
<tr>
<td>
<input type="text" name="name" id="name"/>
</td>
</tr>
<tr>
<td>
<input type="submit" value="提交"/>
</td>
</tr>
</table>
</form>
</body>
</html>
Servlet代码:
public class DemoServlet extends HttpServlet {
public void doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
String name = request.getParameter("name");
System.out.println(name);
}
public void doPost(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
doGet(request, response);
}
}
其中DemoServlet是一个继承了HttpServlet类的Servlet类,当表单提交(点击提交按钮)时,回去调用这个类的doPost()方法,执行对应的代码,通过request.getParameter("name")来获取表单的值。
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