java mail使用qq邮箱发邮件的配置方法

程序入口：
test_email_n.java

import java.io.ioexception;
import java.util.date;
import java.util.properties;

import javax.mail.authenticator;
import javax.mail.bodypart;
import javax.mail.message;
import javax.mail.messagingexception;
import javax.mail.multipart;
import javax.mail.transport;
import javax.mail.internet.addressexception;
import javax.mail.internet.internetaddress;
import javax.mail.internet.mimebodypart;
import javax.mail.internet.mimemessage;
import javax.mail.internet.mimemultipart;

public class test_email_n {
    public static void  main(string args[]){
        try {
            send_email();
        }catch (exception e) {
            e.printstacktrace();
        }
    }

    public static void send_email() throws ioexception, addressexception, messagingexception{

        string to = "[e-mail]";
        string subject = "subject";
        string content = "content";
        properties properties = new properties();
        properties.put("mail.smtp.host", "smtp.qq.com");
        properties.put("mail.smtp.port", "25");
        properties.put("mail.smtp.auth", "true");
        authenticator authenticator = new email_authenticator("[e-mail]", "password");
        javax.mail.session sendmailsession = javax.mail.session.getdefaultinstance(properties, authenticator);
        mimemessage mailmessage = new mimemessage(sendmailsession);
        mailmessage.setfrom(new internetaddress("[e-mail]"));
        // message.recipienttype.to属性表示接收者的类型为to
        mailmessage.setrecipient(message.recipienttype.to, new internetaddress(to));
        mailmessage.setsubject(subject, "utf-8");
        mailmessage.setsentdate(new date());
        // minimultipart类是一个容器类，包含mimebodypart类型的对象
        multipart mainpart = new mimemultipart();
        // 创建一个包含html内容的mimebodypart
        bodypart html = new mimebodypart();
        html.setcontent(content.trim(), "text/html; charset=utf-8");
        mainpart.addbodypart(html);
        mailmessage.setcontent(mainpart);
        transport.send(mailmessage);
    }
}

其中依赖的jar包为javax.mail,我这里是maven管理的，直接用maven去下载jar包,也可以到https://java.net/projects/javamail/pages/home直接下载jar包.

<dependency>
            <groupid>javax.mail</groupid>
            <artifactid>mail</artifactid>
            <version>1.5.0-b01</version>
        </dependency>

email_authenticator.java,这里继承了authenticator 类，用来封装name,和password的：

package com.infomorrow.webtest.juxinlitest.restdetect;

import javax.mail.authenticator;
import javax.mail.passwordauthentication;
public class email_authenticator extends authenticator {
    string username = null;
    string password = null;
    public email_authenticator() {
    }
    public email_authenticator(string username, string password) {
        this.username = username;
        this.password = password;
    }
    protected passwordauthentication getpasswordauthentication() {
        return new passwordauthentication(username, password);
    }
}

配置就这么多，把邮箱密码改成自己的就可以了，否则会报错。程序到这就可以运行了！

下面介绍的是配置properties文件来管理账号密码:

新建一个email.propertis文件。

email.propertis:

mail.smtp.host=smtp.qq.com
mail.smtp.port=25
username=[e-mail]
password=password

test_email.java 代码改为如下：

package com.infomorrow.webtest.juxinlitest.restdetect;

import java.io.ioexception;
import java.io.inputstream;
import java.util.date;
import java.util.properties;

import javax.mail.authenticator;
import javax.mail.bodypart;
import javax.mail.message;
import javax.mail.messagingexception;
import javax.mail.multipart;
import javax.mail.transport;
import javax.mail.internet.addressexception;
import javax.mail.internet.internetaddress;
import javax.mail.internet.mimebodypart;
import javax.mail.internet.mimemessage;
import javax.mail.internet.mimemultipart;

public class test_email {

　　public static void main(string args[]){
        try {
            send_email();
        }catch (exception e) {
            e.printstacktrace();
        }
    }

    public static void send_email() throws ioexception, addressexception, messagingexception{

        string to = "[e-mail]";
        string subject = "subject";//邮件主题
        string content = "content";//邮件内容
        properties properties = new properties();
        inputstream resourceasstream = null;
        try {
             resourceasstream = object.class.getresourceasstream("/email.properties");
            properties.load(resourceasstream);
        } finally{
            if (resourceasstream!=null) {
                resourceasstream.close();
            }
        }
        system.err.println("properties:"+properties);
        properties.put("mail.smtp.host", properties.get("mail.smtp.host"));
        properties.put("mail.smtp.port", properties.get("mail.smtp.port"));
        properties.put("mail.smtp.auth", "true");
        authenticator authenticator = new email_authenticator(properties.get("username").tostring(), properties.get("password").tostring());
        javax.mail.session sendmailsession = javax.mail.session.getdefaultinstance(properties, authenticator);
        mimemessage mailmessage = new mimemessage(sendmailsession);
        mailmessage.setfrom(new internetaddress(properties.get("username").tostring()));
        // message.recipienttype.to属性表示接收者的类型为to
        mailmessage.setrecipient(message.recipienttype.to, new internetaddress(to));
        mailmessage.setsubject(subject, "utf-8");
        mailmessage.setsentdate(new date());
        // minimultipart类是一个容器类，包含mimebodypart类型的对象
        multipart mainpart = new mimemultipart();
        // 创建一个包含html内容的mimebodypart
        bodypart html = new mimebodypart();
        html.setcontent(content.trim(), "text/html; charset=utf-8");
        mainpart.addbodypart(html);
        mailmessage.setcontent(mainpart);
        transport.send(mailmessage);
    }
}

ok,到此为止。