无法在Servlet中解析参数 [英] Parameters cannot be resolved in servlets

问题描述

我正在尝试从jsp page-index.jsp获取凭证 在我的servlet-LoginServlet中，当使用dao软件包时，使用

I am tryin to get the credentials from jsp page-index.jsp In my servlet-LoginServletwhen under package dao i use

String userName = request.getParameter(usrnm_gtalk);
String password = request.getParameter(password_gtalk);

说usrnm_gtalk和password_gtalk无法解析.

在我的jsp中

<form name="LoginForm" method="post" action="/dao/LoginServlet>   
<input type="text" name="usrnm_gtalk"/>
<input type="password" name="password_gtalk" />

web.xml

<welcome-file-list>
    <welcome-file>index.jsp</welcome-file>
  </welcome-file-list>
  <servlet>
    <description></description>
    <display-name>LoginServlet</display-name>
    <servlet-name>LoginServlet</servlet-name>
    <servlet-class>dao.LoginServlet</servlet-class>
  </servlet>
  <servlet-mapping>
    <servlet-name>LoginServlet</servlet-name>
    <url-pattern>/Login</url-pattern>
  </servlet-mapping>

我在库中有servlet-api jar以及构建路径

i have the servlet-api jar in the lib as well as build path

谁能指出point是问题所在 谢谢

can anyone point out wat is the problem Thanks

推荐答案

您需要将它们表示为带双引号的字符串，而不是不存在的变量(因为编译器试图告诉您).

You need to represent them as strings, with doublequotes, not as non-existing variables (as the compiler is trying to tell you).

String userName = request.getParameter("usrnm_gtalk"); 
String password = request.getParameter("password_gtalk");

另请参见:

• Java教程-字符串
• "Servlet信息"页面-包含一个小小的问候世界

See also:

• The Java Tutorials - Strings
• Servlets info page - contains a little hello world

这篇关于无法在Servlet中解析参数的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！