Servlets I';我收到一个404错误,don';我不知道我在做什么;我失踪了
我有以下servlet:Servlets I';我收到一个404错误,don';我不知道我在做什么;我失踪了,servlets,http-status-code-404,Servlets,Http Status Code 404,我有以下servlet: import java.io.*; import javax.servlet.*; import javax.servlet.http.*; public class MailServlet extends HttpServlet { @Override public void doGet(HttpServletRequest request, HttpServletResponse response) throws Serv
import java.io.*;
import javax.servlet.*;
import javax.servlet.http.*;
public class MailServlet extends HttpServlet {
@Override
public void doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
response.setContentType("text/html");
PrintWriter out = response.getWriter();
String m = request.getParameter("mail");
String sub = request.getParameter("subject");
String messg = request.getParameter("message");
SendMail.send(m, sub, messg);
out.print("Your Mail has been sent successfully");
out.close();
}
}
我试图通过以下形式调用它:
<html>
<head>
<title></title>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<meta name="viewport" content="width=device-width">
</head>
<body bgcolor="pink">
<form action="MailServlet">
<table>
<tr>
<td>To:</td>
<td><input type="text" name="mail"/><br/></td>
</tr>
<tr>
<td>Subject:</td>
<td><input type="text" name="subject"><br/></td>
</tr>
<tr>
<td>Message Text:</td>
<td><textarea rows="12" cols="80" name="message"></textarea><br/></td>
</tr>
<tr>
<td><input type="submit" value="Send"></td>
<td><input type="reset" value="Reset"></td>
</tr>
</table>
</form>
</body>
致:
主题:
信息文本:
但是,它返回HTTP状态404:
需要映射servlet才能访问它们 如果您使用的是Servlet 3.0,则可以使用:
@WebServlet("/MailServlet") // /MailServlet is the partial URL of the servlet.
public class MailServlet extends HttpServlet {
[...]
}
如果未使用Servlet 3.0,则必须在web.xml
中映射Servlet,方法是将以下行放入webapp
元素中:
<servlet>
<servlet-name>MailServlet</servlet-name>
<servlet-class>com.yourpackage.MailServlet</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>MailServlet</servlet-name>
<url-pattern>/MailServlet</url-pattern>
</servlet-mapping>
MailServlet
com.yourpackage.MailServlet
MailServlet
/MailServlet
您是否在web.xml中映射了servlet?没有。您能给我一些指导吗@反斜杠谢谢你节省了我的时间。它起作用了。