Web Dev Notes - 7 - Checkbox示例

最新推荐文章于 2024-04-22 13:05:22 发布

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#web #input #stylesheet #server #equals #string

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本文展示了一个HTML页面实现多选框提交功能，并通过Java Servlet处理客户端提交的数据。

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.html

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
	<head>
		<title>多变量提交</title>

		<meta http-equiv="keywords" content="keyword1,keyword2,keyword3">
		<meta http-equiv="description" content="this is my page">
		<meta http-equiv="content-type" content="text/html; charset=gb2312">

		<!--<link rel="stylesheet" type="text/css" href="./styles.css">-->

	</head>

	<body bgcolor="#FFFFFF">
		选出你喜欢吃的水果：
		<form name="form1" method="post" action="multichoice">
			<input type="checkbox" name="checkbox1" value="苹果">
			苹果
			<input type="checkbox" name="checkbox1" value="西瓜">
			西瓜
			<input type="checkbox" name="checkbox1" value="桃子">
			桃子
			<input type="checkbox" name="checkbox1" value="葡萄">
			葡萄
			<input type="reset" name="Reset" value="重置">
			<input type="submit" name="Submit" value="提交">
		</form>
	</body>
</html>

web.xml

	<servlet>
		<servlet-name>multichoice</servlet-name>
		<servlet-class>lily.test.MultiChoiceServlet</servlet-class>
	</servlet>

	<servlet-mapping>
		<servlet-name>multichoice</servlet-name>
		<url-pattern>/ex/multichoice</url-pattern>
	</servlet-mapping>

.java

package lily.test;

import java.io.IOException;
import java.io.PrintWriter;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

public class MultiChoiceServlet extends HttpServlet {

	protected void processRequest(HttpServletRequest request,
			HttpServletResponse response) throws ServletException, IOException {

		response.setContentType("text/html; charset=gb2312");
		request.setCharacterEncoding("gb2312");
		PrintWriter out = response.getWriter();
		String[] paramValues = request.getParameterValues("checkbox1");
		String temp = new String("");
		for (int i = 0; i < paramValues.length; i++) {
			temp += paramValues[i] + " ";
		}
		out.println(temp);
		out.close();
	}

	/**
	 * The doGet method of the servlet. <br>
	 * 
	 * This method is called when a form has its tag value method equals to get.
	 * 
	 * @param request
	 *            the request send by the client to the server
	 * @param response
	 *            the response send by the server to the client
	 * @throws ServletException
	 *             if an error occurred
	 * @throws IOException
	 *             if an error occurred
	 */
	public void doGet(HttpServletRequest request, HttpServletResponse response)
			throws ServletException, IOException {

		processRequest(request, response);
	}

	/**
	 * The doPost method of the servlet. <br>
	 * 
	 * This method is called when a form has its tag value method equals to
	 * post.
	 * 
	 * @param request
	 *            the request send by the client to the server
	 * @param response
	 *            the response send by the server to the client
	 * @throws ServletException
	 *             if an error occurred
	 * @throws IOException
	 *             if an error occurred
	 */
	public void doPost(HttpServletRequest request, HttpServletResponse response)
			throws ServletException, IOException {

		processRequest(request, response);
	}

}

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