错误1：
描述资源路径位置类型未构建项目 因为它的构建路径不完整。找不到类文件 java.util.Map $条目。修复构建路径，然后尝试构建此项目 EmailSendingWebApp未知Java问题
错误2：
描述资源路径位置类型类型java.util.Map $ Entry 无法解决。它是从必需的.class中间接引用的 文件EmailUtility.java / EmailSendingWebApp / src / net / codejava / email 第29行Java问题
这是我的代码：
code 1 : package net.codejava.email;
import java.util.Date;
import java.util.Properties;
import javax.mail.Authenticator;
import javax.mail.Message;
import javax.mail.MessagingException;
import javax.mail.PasswordAuthentication;
import javax.mail.Session;
import javax.mail.Transport;
import javax.mail.internet.AddressException;
import javax.mail.internet.InternetAddress;
import javax.mail.internet.MimeMessage;
/**
* A utility class for sending e-mail messages
* @author www.codejava.net
*
*/
public class EmailUtility {
public static void sendEmail(String host, String port,
final String userName, final String password, String toAddress,
String subject, String message) throws AddressException,
MessagingException {
// sets SMTP server properties
Properties properties = new Properties();
properties.put("mail.smtp.host", host);
properties.put("mail.smtp.port", port);
properties.put("mail.smtp.auth", "true");
properties.put("mail.smtp.starttls.enable", "true");
// creates a new session with an authenticator
Authenticator auth = new Authenticator() {
public PasswordAuthentication getPasswordAuthentication() {
return new PasswordAuthentication(userName, password);
}
};
Session session = Session.getInstance(properties, auth);
// creates a new e-mail message
Message msg = new MimeMessage(session);
msg.setFrom(new InternetAddress(userName));
InternetAddress[] toAddresses = { new InternetAddress(toAddress) };
msg.setRecipients(Message.RecipientType.TO, toAddresses);
msg.setSubject(subject);
msg.setSentDate(new Date());
msg.setText(message);
// sends the e-mail
Transport.send(msg);
}
}
code 2 :
package net.codejava.email;
import java.io.IOException;
import javax.servlet.ServletContext;
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
/**
* A servlet that takes message details from user and send it as a new e-mail
* through an SMTP server.
*
* @author www.codejava.net
*
*/
@WebServlet("/EmailSendingServlet")
public class EmailSendingServlet extends HttpServlet {
private String host;
private String port;
private String user;
private String pass;
public void init() {
// reads SMTP server setting from web.xml file
ServletContext context = getServletContext();
host = context.getInitParameter("host");
port = context.getInitParameter("port");
user = context.getInitParameter("user");
pass = context.getInitParameter("pass");
}
protected void doPost(HttpServletRequest request,
HttpServletResponse response) throws ServletException, IOException {
// reads form fields
String recipient = request.getParameter("recipient");
String subject = request.getParameter("subject");
String content = request.getParameter("content");
String resultMessage = "";
try {
EmailUtility.sendEmail(host, port, user, pass, recipient, subject,
content);
resultMessage = "The e-mail was sent successfully";
} catch (Exception ex) {
ex.printStackTrace();
resultMessage = "There were an error: " + ex.getMessage();
} finally {
request.setAttribute("Message", resultMessage);
getServletContext().getRequestDispatcher("/Result.jsp").forward(
request, response);
}
}
}
我是eclipse的新手，所以我不知道如何链接这两个文件，请帮忙。感谢。
答案 0 :(得分：0)
Eclipse可以针对不同的已安装JRE编译Java项目。除非小心，否则项目对其JRE的引用是不可移植的。验证已安装的JRE 首选项页面是否指向有效的内容，然后编辑项目的 Java构建路径，以便它引用有效的JRE