我有一个简单的Servlet，用于发送电子邮件和一个html-form:
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>A form</title>
</head>
<body>
<form action="feedback" method="post">
<!-- Simple text field -->
<label for="name">Name </label>
<input type="text" name="name"/>
<br/>
<!-- Email -->
<label for="email">Email </label>
<input type="email" name="email"/>
<br/>
<!-- Textarea -->
<label for="description">Description </label>
<textarea name="description" cols="50" rows="5">Type your comment here</textarea>
<br/>
<input type="submit" name="submit" value="Send Request"/>
</form>
</body>
</html>
在 web.xml 文件夹中，我注册并映射了 servlet。 但是当我按下发送按钮时，我得到:
HTTP 错误 404
访问/反馈时出现问题。原因:
NOT_FOUND
我的问题还出在哪里？
--更新-- http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd” 版本=“2.5”xmlns=“http://java.sun.com/xml/ns/javaee”>
<!-- Servlets -->
<servlet>
<servlet-name>FeedbackServlet</servlet-name>
<servlet-class>org.wunderapps.mailservice.server.FeedbackServlet</servlet-class>
</servlet>
<servlet>
<servlet-name>TestAppServlet</servlet-name>
<servlet-class>org.wunderapps.mailservice.server.TestAppServlet</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>FeedbackServlet</servlet-name>
<url-pattern>/wunderapps_mail_service/mail</url-pattern>
</servlet-mapping>
<servlet-mapping>
<servlet-name>TestAppServlet</servlet-name>
<url-pattern>/wunderapps_mail_service/test</url-pattern>
</servlet-mapping>
<!-- Default page to serve -->
<welcome-file-list>
<welcome-file>Wunderapps_mail_service.html</welcome-file>
</welcome-file-list>
Servlet:
package org.wunderapps.mailservice.server;
import java.io.IOException;
import java.util.Properties;
import javax.mail.Message;
import javax.mail.Session;
import javax.mail.Transport;
import javax.mail.internet.InternetAddress;
import javax.mail.internet.MimeMessage;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
@SuppressWarnings("serial")
public class FeedbackServlet extends HttpServlet {
@Override
protected void doPost(HttpServletRequest req, HttpServletResponse resp)
throws ServletException, IOException {
String name = req.getParameter("name");
String description = req.getParameter("description");
String email = req.getParameter("email");
Properties props = new Properties();
Session session = Session.getDefaultInstance(props, null);
String msgBody = name + " :Name" + "\n" + description + " :Description" + "\n" + email + " :EMAIL";
try {
Message msg = new MimeMessage(session);
msg.setFrom(new InternetAddress("apps@gmail.com",
"it works"));
msg.addRecipient(Message.RecipientType.TO, new InternetAddress("testtesttest@gmail.com", "Your name"));
msg.setSubject("Bestellung");
msg.setText(msgBody);
Transport.send(msg);
} catch (Exception e) {
resp.setContentType("text/plain");
resp.getWriter().println("Something went wrong. Please try again.");
throw new RuntimeException(e);
}
resp.setContentType("text/plain");
resp.getWriter().println(
"Thank you for your feedback. An Email has been send out.");
}
}
最佳答案
来自您的web.xml看来 url 模式存在一些问题，因此只会给出 404 错误。更改<form action="feedback" method="post">至<form action="/wunderapps_mail_service/mail" method="post">或者您也可以更改 web.xml。
<servlet-mapping>
<servlet-name>FeedbackServlet</servlet-name>
<url-pattern>/feedback</url-pattern>
</servlet-mapping>
关于java - 谷歌应用引擎: How to send a Form POST?，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/11473228/