java发邮件接口（java 怎么实现发送邮件例子）

本文目录

• java 怎么实现发送邮件例子
• 怎样用java实现邮件的发送
• java中如何实现公司邮箱发送邮件配置
• 怎样用java发送邮件

java 怎么实现发送邮件例子

第一个类：MailSenderInfo.java

[java] view plain copy
package com.util.mail;
/**
* 发送邮件需要使用的基本信息
*author by wangfun

怎样用java实现邮件的发送

import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.OutputStreamWriter;
import java.net.Socket;
import java.net.SocketException;
import java.rmi.UnknownHostException;
import java.util.StringTokenizer;

import sun.misc.BASE64Encoder;

public class Sender {
//private boolean debug = true;
BASE64Encoder encode=new BASE64Encoder();//用于加密后发送用户名和密码
static int dk=25;

private Socket socket;

public Sender(String server, int port) throws UnknownHostException,
IOException {
try {
socket = new Socket(server, dk);
} catch (SocketException e) {
System.out.println(e.getMessage());
} catch (Exception e) {
e.printStackTrace();
} finally {
//System.out.println(“已经建立连接!“);
}

}

// 注册到邮件服务器
public void helo(String server, BufferedReader in, BufferedWriter out)
throws IOException {
int result;
result = getResult(in);
// 连接上邮件服务后,服务器给出220应答
if (result != 220) {
throw new IOException(“连接服务器失败“);
}
result = sendServer(“HELO “ + server, in, out);
// HELO命令成功后返回250
if (result != 250) {
throw new IOException(“注册邮件服务器失败！“);
}
}

private int sendServer(String str, BufferedReader in, BufferedWriter out)
throws IOException {
out.write(str);
out.newLine();
out.flush();
/*
if (debug) {
System.out.println(“已发送命令:“ + str);
}
*/
return getResult(in);
}

public int getResult(BufferedReader in) {
String line = ““;
try {
line = in.readLine();
/*
if (debug) {
System.out.println(“服务器返回状态:“ + line);
}
*/
} catch (Exception e) {
e.printStackTrace();
}
// 从服务器返回消息中读出状态码,将其转换成整数返回

StringTokenizer st = new StringTokenizer(line, “ “);
return Integer.parseInt(st.nextToken());
}

public void authLogin(MailMessage message, BufferedReader in,
BufferedWriter out) throws IOException {
int result;
result = sendServer(“AUTH LOGIN“, in, out);

if (result != 334) {
throw new IOException(“用户验证失败！“);
}

result=sendServer(encode.encode(message.getUser().getBytes()),in,out);
//System.out.println(“用户名： “+encode.encode(message.getUser().getBytes()));
if (result != 334) {
throw new IOException(“用户名错误！“);
}
result=sendServer(encode.encode(message.getPassword().getBytes()),in,out);
//result=sendServer(message.getPassword(),in,out);
//System.out.println(“密码： “+encode.encode(message.getPassword().getBytes()));
if (result != 235) {
throw new IOException(“验证失败！“);
}
}

// 开始发送消息，邮件源地址
public void mailfrom(String source, BufferedReader in, BufferedWriter out)
throws IOException {
int result;
result = sendServer(“MAIL FROM:《“ + source + “》“, in, out);
if (result != 250) {
throw new IOException(“指定源地址错误“);
}
}

// 设置邮件收件人
public void rcpt(String touchman, BufferedReader in, BufferedWriter out)
throws IOException {
int result;
result = sendServer(“RCPT TO:《“ + touchman + “》“, in, out);
if (result != 250) {
throw new IOException(“指定目的地址错误！“);
}
}

// 邮件体
public void data(String from, String to, String subject, String content,
BufferedReader in, BufferedWriter out) throws IOException {
int result;
result = sendServer(“DATA“, in, out);
// 输入DATA回车后,若收到354应答后,继续输入邮件内容
if (result != 354) {
throw new IOException(“不能发送数据“);
}
out.write(“From: “ + from);
out.newLine();
out.write(“To: “ + to);
out.newLine();
out.write(“Subject: “ + subject);
out.newLine();
out.newLine();
out.write(content);
out.newLine();
// 句号加回车结束邮件内容输入
result = sendServer(“.“, in, out);
//System.out.println(result);
if (result != 250) {
throw new IOException(“发送数据错误“);
}
}

// 退出
public void quit(BufferedReader in, BufferedWriter out) throws IOException {
int result;
result = sendServer(“QUIT“, in, out);
if (result != 221) {
throw new IOException(“未能正确退出“);
}
}

// 发送邮件主程序
public boolean sendMail(MailMessage message, String server) {
try {
BufferedReader in = new BufferedReader(new InputStreamReader(
socket.getInputStream()));
BufferedWriter out = new BufferedWriter(new OutputStreamWriter(
socket.getOutputStream()));
helo(server, in, out);// HELO命令
authLogin(message, in, out);// AUTH LOGIN命令
mailfrom(message.getFrom(), in, out);// MAIL FROM
rcpt(message.getTo(), in, out);// RCPT
data(message.getDatafrom(), message.getDatato(),
message.getSubject(), message.getContent(), in, out);// DATA
quit(in, out);// QUIT
} catch (Exception e) {
e.printStackTrace();
return false;

}
return true;
}
}
再写一个MailMessage.java，set/get方法即可。

java中如何实现公司邮箱发送邮件配置

Java中可以通过Javamail API实现公司邮箱邮件发送配置，Java mail是利用现有的邮箱账户发送邮件的工具，具体步骤如如下：
1、通过JavamailAPI设置发送者邮箱用户名及密码
2、通过JavamailAPI设置邮件主题、邮件内容、附件及邮件发送时间
3、通过JavamailAPI设置发送者邮箱地址及接收者邮箱地址，接收者地址可以是多个及抄送
4、邮件的需基本元素都设置完毕后，即可通过Javamail API的发送接口执行发送操作。

怎样用java发送邮件

1. 首先下载 JavaMail jar 包，并导入到项目中。下载地址

2. 编写代码，代码如下：

3. 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;
   
   public class App45 {
   
   public static void main(String args) throws AddressException, MessagingException {
   
   Properties properties = System.getProperties();
   
   properties.setProperty(“mail.smtp.host“, “邮件发送服务器“);
   
   properties.setProperty(“mail.smtp.auth“, “true“);
   
   Session session = Session.getDefaultInstance(properties, new Authenticator() {
   @Override
   protected PasswordAuthentication getPasswordAuthentication() {
   
   // 设置发件人邮件帐号和密码
   return new PasswordAuthentication(“邮件帐号“, “密码“);
   }
   });
   
   MimeMessage message = new MimeMessage(session);
   
   // 设置发件人邮件地址
   message.setFrom(new InternetAddress(“发件人邮件地址“));
   
   // 设置收件人邮件地址
   message.addRecipient(Message.RecipientType.TO, new InternetAddress(“收件人邮件地址“));
   
   message.setSubject(“这里是邮件主题。“);
   
   message.setText(“这里是邮件内容。“);
   
   Transport.send(message);
   }
   }