servlet取参数 servlet为什么接收到form表单单选按钮的值为空 解决方案 » 免费领取超大流量手机卡,每月29元包185G流量+100分钟通话, 中国电信官方发货 html页面如下:<html> <head> <title>用户信息表单提交</title> <script type="text/javascript"> function chk(){ var sex; var sexV=userInfoFrm.userSex; if(sexV[0].checked==false && sexV[1].checked==false){ alert("请选择性别!"); return false; }else if(sex[0].checked==true){ sex="男"; }else{ sex="女"; } //document.userInfoFrm.action="userinfoservlet"; } </script> <style type="text/css"> body{ color:#000000; font-size:14px; } input{ border:#9933CC 1px solid; background-color:#FFFF00; color:blue; font-size:12px; } </style> </head> <body bgcolor="ffddcc"> <center> <p align="center"><font size="6">用户注册表</font></p> <form action="userinfoservlet" name="userInfoFrm" method="POST" onsubmit="return chk()" > <table width="455"> <tr> <td width="96">用户ID:</td> <td width="347"><label> <input name="userID" type="text" id="txtUserID" size="25" maxlength="20" /> </label></td> </tr> <tr> <td>密码:</td> <td><label> <input name="txtPwd" type="password" id="txtpwd" size="25" maxlength="20" /> </label></td> </tr> <tr> <td>姓名:</td> <td><input name="txtName" type="text" id="txtName" size="25" maxlength="20" /></td> </tr> <tr> <td>性别:</td> <td><p> <label> <input type="radio" name="userSex" value="男" /> 男</label> <label> <input type="radio" name="userSex" value="女" /> 女</label> <br /> </p></td> </tr> <tr> <td>年龄:</td> <td><input name="txtAge" type="text" id="txtAge" size="15" maxlength="3" /> 岁</td> </tr> <tr> <td colspan="2" align="center" valign="middle"><label> <input type="submit" name="Submit" value=" 提交 " /> <input name="reset" type="reset" id="reset" value=" 重置 " /> </label></td> </tr> </table> </form> </center> </body></html>servlet的代码如下:package showuserinfo;import javax.servlet.*;import javax.servlet.jsp.*;import javax.servlet.http.*;import java.io.*;import java.util.*;public class UserInfoServlet extends HttpServlet { public UserInfoServlet() { } private static final String CONTENT_TYPE = "text/html; charset=GBK"; //Initialize global variables public void init() throws ServletException { } //Process the HTTP Get request public void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { //设置响应客户端请求的内容类型 response.setContentType(CONTENT_TYPE); //获取字符输法对象 PrintWriter out= response.getWriter(); //获取客户端请求的各个参数 String userID = request.getParameter("userID"); if (userID == null) { userID = ""; } String userPwd = request.getParameter("txtPwd"); if (userPwd == null) { userPwd = ""; } String userName = request.getParameter("txtName"); if (userName == null) { userName = ""; } //******取到的值为空? String userSex = request.getParameter("userSex"); System.out.println(userSex); String userAge = request.getParameter("txtAge"); if (userAge == null) { userAge = ""; } //向客户端输出用户信息 out.println("<html>"); out.println("<head><title>UserInfoServlet</title></head>"); out.println("<body bgcolor=\"#ffddcc\"><center>"); out.println("<p align=center><font size=6 color=red>用户详细信息</font><br><br>"); out.println("<table border=0>"); out.println("<tr><td>用户ID:</td><td>" + userID+"</td></tr>"); out.println("<tr><td>密码:</td><td>" + userPwd+"</td></tr>"); out.println("<tr><td>姓名:</td><td>" +userName +"</td></tr>"); out.println("<tr><td>性别:</td><td>" + userSex+"</td></tr>"); out.println("<tr><td>年龄:</td><td>" +userAge +"</td></tr>"); out.println("</table></center></body>"); out.println("</html>"); out.close(); } //Process the HTTP Post request public void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { doGet(request, response); } //Clean up resources public void destroy() { }} <input type="radio" name="userSex" value="男" onclick="alert(value)"/> 男</label> <label> <input type="radio" name="userSex" value="女" onclick="alert(value)"/> 女</label>我试了, 这样也能显示啊。Servlet里面这样能得到啊。 有点晕、 我帮你测试了下,没有问题servlet打印出页面单选按钮的值无误 谢谢,我把工程重新make就Ok了! 获取外网的IP地址 想卖个6000左右的笔记本,大家帮忙推荐一下 请教高手.....charset=GBK 乱码问题 请教问题:servlet的dopost方法返回异常 自定义标签的问题 入门问题:JSP一般用什么数据库? executeUpdate不能将数据提交给SQLServer 高分求教!已开一贴!关于spring tiles! 这个bean为什么跑不起来,一跑就死!请大家看看! 连接提示问题 上传文件时的问题,谢谢! 本地的java程序放到服务器后,传值乱码
<head>
<title>用户信息表单提交</title>
<script type="text/javascript">
function chk(){
var sex;
var sexV=userInfoFrm.userSex;
if(sexV[0].checked==false && sexV[1].checked==false){
alert("请选择性别!");
return false;
}else if(sex[0].checked==true){
sex="男";
}else{
sex="女";
}
//document.userInfoFrm.action="userinfoservlet";
}
</script>
<style type="text/css">
body{
color:#000000;
font-size:14px;
}
input{
border:#9933CC 1px solid;
background-color:#FFFF00;
color:blue;
font-size:12px;
}
</style>
</head>
<body bgcolor="ffddcc">
<center>
<p align="center"><font size="6">用户注册表</font></p>
<form action="userinfoservlet" name="userInfoFrm" method="POST" onsubmit="return chk()" >
<table width="455">
<tr>
<td width="96">用户ID:</td>
<td width="347"><label>
<input name="userID" type="text" id="txtUserID" size="25" maxlength="20" />
</label></td>
</tr>
<tr>
<td>密码:</td>
<td><label>
<input name="txtPwd" type="password" id="txtpwd" size="25" maxlength="20" />
</label></td>
</tr>
<tr>
<td>姓名:</td>
<td><input name="txtName" type="text" id="txtName" size="25" maxlength="20" /></td>
</tr>
<tr>
<td>性别:</td>
<td><p>
<label>
<input type="radio" name="userSex" value="男" />
男</label>
<label>
<input type="radio" name="userSex" value="女" />
女</label>
<br />
</p></td>
</tr>
<tr>
<td>年龄:</td>
<td><input name="txtAge" type="text" id="txtAge" size="15" maxlength="3" />
岁</td>
</tr>
<tr>
<td colspan="2" align="center" valign="middle"><label>
<input type="submit" name="Submit" value=" 提交 " />
<input name="reset" type="reset" id="reset" value=" 重置 " />
</label></td>
</tr>
</table>
</form>
</center>
</body>
</html>servlet的代码如下:
package showuserinfo;import javax.servlet.*;
import javax.servlet.jsp.*;
import javax.servlet.http.*;
import java.io.*;
import java.util.*;public class UserInfoServlet extends HttpServlet {
public UserInfoServlet() { } private static final String CONTENT_TYPE = "text/html; charset=GBK"; //Initialize global variables
public void init() throws ServletException {
} //Process the HTTP Get request
public void doGet(HttpServletRequest request, HttpServletResponse response) throws
ServletException, IOException {
//设置响应客户端请求的内容类型
response.setContentType(CONTENT_TYPE);
//获取字符输法对象
PrintWriter out= response.getWriter();
//获取客户端请求的各个参数
String userID = request.getParameter("userID");
if (userID == null) {
userID = "";
}
String userPwd = request.getParameter("txtPwd");
if (userPwd == null) {
userPwd = "";
}
String userName = request.getParameter("txtName");
if (userName == null) {
userName = "";
}
//******取到的值为空?
String userSex = request.getParameter("userSex");
System.out.println(userSex);
String userAge = request.getParameter("txtAge");
if (userAge == null) {
userAge = "";
}
//向客户端输出用户信息
out.println("<html>");
out.println("<head><title>UserInfoServlet</title></head>");
out.println("<body bgcolor=\"#ffddcc\"><center>");
out.println("<p align=center><font size=6 color=red>用户详细信息</font><br><br>");
out.println("<table border=0>");
out.println("<tr><td>用户ID:</td><td>" + userID+"</td></tr>");
out.println("<tr><td>密码:</td><td>" + userPwd+"</td></tr>");
out.println("<tr><td>姓名:</td><td>" +userName +"</td></tr>");
out.println("<tr><td>性别:</td><td>" + userSex+"</td></tr>");
out.println("<tr><td>年龄:</td><td>" +userAge +"</td></tr>");
out.println("</table></center></body>");
out.println("</html>");
out.close();
} //Process the HTTP Post request
public void doPost(HttpServletRequest request, HttpServletResponse response) throws
ServletException, IOException {
doGet(request, response);
} //Clean up resources
public void destroy() {
}}
男</label>
<label>
<input type="radio" name="userSex" value="女" onclick="alert(value)"/>
女</label>
我试了, 这样也能显示啊。
Servlet里面这样能得到啊。
有点晕、