Question

我正在创建一个wepage，我希望使用gsp smtp.i发送邮件尝试使用jsp页面，但我没有工作，所以我已经在核心java中成功发送了email.now我想使用这个java我的jsp页面中的代码.i尝试了我但是出现了错误

java代码：

import java.util.Properties;
import javax.mail.Message;
import javax.mail.MessagingException;
import javax.mail.PasswordAuthentication;
import javax.mail.Session;
import javax.mail.Transport;
import javax.mail.internet.InternetAddress;
import javax.mail.internet.MimeMessage;

public class SSL {
    public static void main(String [] args){
        Properties props = new Properties();
        props.put("mail.smtp.host", "smtp.gmail.com");
        props.put("mail.smtp.socketFactory.port", "465");
        props.put("mail.smtp.socketFactory.class",
                "javax.net.ssl.SSLSocketFactory");
        props.put("mail.smtp.auth", "true");
        props.put("mail.smtp.port", "465");

        Session session = Session.getDefaultInstance(props,
            new javax.mail.Authenticator() {
                protected PasswordAuthentication getPasswordAuthentication() {
                    return new PasswordAuthentication("prakash.d2222","password");
                }
            });

        try {

            Message message = new MimeMessage(session);
            message.setFrom(new InternetAddress("from@no-spam.com"));
            message.setRecipients(Message.RecipientType.TO,
                    InternetAddress.parse("prakash_d22@rediffmail.com"));
            message.setSubject("hi");
            message.setText("12345" +
                    "\n\n No spam to my email, please!");

            Transport.send(message);

            System.out.println("Done");

        } catch (MessagingException e) {
            throw new RuntimeException(e);
        }
    }
}

我的jsp代码

<%@ page contentType="text/html; charset=iso-8859-1" language="java" import="java.sql.*" errorPage="" %>

                <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

                <html>
                <body>
                <jsp:useBean id="link" scope="application" class = "SSL.class" />
<jsp:setProperty name="link" property="*" />

                </body>
                </html>

并显示错误

type Exception report

message

description The server encountered an internal error () that prevented it from fulfilling this request.

exception

org.apache.jasper.JasperException: /pizza/page/ssl.jsp(7,4) The value for the useBean class attribute SSL.class is invalid.
    org.apache.jasper.compiler.DefaultErrorHandler.jspError(DefaultErrorHandler.java:40)
    org.apache.jasper.compiler.ErrorDispatcher.dispatch(ErrorDispatcher.java:407)
    org.apache.jasper.compiler.ErrorDispatcher.jspError(ErrorDispatcher.java:148)
    org.apache.jasper.compiler.Generator$GenerateVisitor.visit(Generator.java:1233)
    org.apache.jasper.compiler.Node$UseBean.accept(Node.java:1178)
    org.apache.jasper.compiler.Node$Nodes.visit(Node.java:2361)
    org.apache.jasper.compiler.Node$Visitor.visitBody(Node.java:2411)
    org.apache.jasper.compiler.Node$Visitor.visit(Node.java:2417)
    org.apache.jasper.compiler.Node$Root.accept(Node.java:495)
    org.apache.jasper.compiler.Node$Nodes.visit(Node.java:2361)
    org.apache.jasper.compiler.Generator.generate(Generator.java:3459)
    org.apache.jasper.compiler.Compiler.generateJava(Compiler.java:231)
    org.apache.jasper.compiler.Compiler.compile(Compiler.java:354)
    org.apache.jasper.compiler.Compiler.compile(Compiler.java:334)
    org.apache.jasper.compiler.Compiler.compile(Compiler.java:321)
    org.apache.jasper.JspCompilationContext.compile(JspCompilationContext.java:592)
    org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:328)
    org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:313)
    org.apache.jasper.servlet.JspServlet.service(JspServlet.java:260)
    javax.servlet.http.HttpServlet.service(HttpServlet.java:717

所以请帮助我，因为我是jsp的新手。

Answer 1

考虑以下建议：

.class个文件必须放在WEB-INF / classes
从不在默认包中创建类。

package com.me;

public class SSL { 
    public void show(){
         ///
    }
}

我不能在您的班级中查看任何getter/setter方法，因此无需在jsp页面中使用<jsp:setProperty/>操作，也不包含{{1属性。

class

编辑：

如果您使用IDE（netbeans / eclipse） NOT ，则必须在<jsp:useBean id="link" scope="application" class="com.me.SSL" />下创建文件夹结构。

/tomcat x.x/webapps/

你必须在JSP页面中调用show（）方法：

/webapp   <--- This is known as `context` folder
|
|-------/WEB-INF
|       |
|       |-----------/classes
|       |                  |---/com/me/SSL.class
|       | 
|       |-----------/lib
|                    mail.jar
| sample.jsp

OR

<jsp:useBean id="link" scope="application" class="com.me.SSL" />
<%
  link.show();
%>

Answer 2

Firslt修改您的课程 SSL

public class SSL {

 public  void SendMail(){
        Properties props = new Properties();
        props.put("mail.smtp.host", "smtp.gmail.com");
        props.put("mail.smtp.socketFactory.port", "465");
        props.put("mail.smtp.socketFactory.class",
                "javax.net.ssl.SSLSocketFactory");
        props.put("mail.smtp.auth", "true");
        props.put("mail.smtp.port", "465");

        Session session = Session.getDefaultInstance(props,
            new javax.mail.Authenticator() {
                protected PasswordAuthentication getPasswordAuthentication() {
                    return new PasswordAuthentication("prakash.d2222","password");
                }
            });

        try {

            Message message = new MimeMessage(session);
            message.setFrom(new InternetAddress("from@no-spam.com"));
            message.setRecipients(Message.RecipientType.TO,
                    InternetAddress.parse("prakash_d22@rediffmail.com"));
            message.setSubject("hi");
            message.setText("12345" +
                    "\n\n No spam to my email, please!");

            Transport.send(message);

            System.out.println("Done");

        } catch (MessagingException e) {
            throw new RuntimeException(e);
        }
    }
}

只需创建一个可与您合作的自定义bean类 SSL ，并将其命名为 SSLImpelmenter

你的班级

public class SSLImpelmenter
{
   private SSL objSSL = new SSL();

   //getter setter methods for objSSL
}

现在在你的JSP中

//Add import for SSL Class
//Now Use useBean tag
<jsp:useBean id="link" scope="application" class = "SSLImpelmenter" />

SSL objSSLJSP = link.getObjSSL(); 
objSSLJSP.SendMail();

Answer 3

当前的问题是您在“class = ...”属性中使用文件名而不是类名。由于您的类在默认包中声明（因为您的类中没有package声明），您应该将useBean写为：

<jsp:useBean id="link" scope="application" class="SSL" />

如果您还没有这样做，则应确保“SSL.class”文件位于您的webapp的类路径中。例如，它可以位于“/ WEB-INF / classes /”目录中，也可以位于“/ WEB-INF / lib /".

中的JAR文件中。

在jsp中调用java文件

3 个答案: