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通过开源代码EasySMTPConnection了解SMTP工作流程,sun公司的实现中屏蔽了这个流程

monster — Fri, 15 Jun 2007 06:52:00 GMT

现贴出主要类,主要流程都在这个类中:
package com.blankenhorn.net.mail;

import java.io.*;
import java.net.InetAddress;
import java.net.Socket;
import java.net.SocketTimeoutException;
import java.util.Date;
import java.util.StringTokenizer;

/**
* Provides a simple way to send emails to an SMTP server.
*
* @author Kai Blankenhorn <pub01@bitfolge.de>
*/
public class EasySMTPConnection {

    private String server = null;
    private BufferedReader in = null;
    private BufferedWriter out = null;
    private Socket socket = null;

    /**
    * Usage example.
    */
    public static void main(String[] args) {
        try {
            EasySMTPConnection smtp = new EasySMTPConnection("127.0.0.1");
            Message msg = new Message();
            msg.setTo("");

            String[] source = {
                "From: Test User ",
                "To: Kai Blankenhorn , Somebody ",
                "Subject: EasySMTPConnection Test",
                "Date: insertdate",
                "Content-Type: text/plain; charset=iso-8859-1",
                // you may set the message ID, but you don't have to
                // "Message-ID: "+EasySMTPConnection.createMessageID("yourserver.com"),
                "",
                "first line,",
                "second line",
                "as you can see, no need for newlines (\\n)",
                ""
            };
            msg = new Message(source);
            smtp.sendMessage(msg);
        } catch(MailProtocolException e) {
            e.printStackTrace();
        }
        catch(InstantiationException e) {
            e.printStackTrace();
        }
    }

    /**
    * Creates a unique message ID for an email message.
    *
    * @param hostName the internet name of the computer the mail is being sent from
    */
    public static String createMessageID(String hostName) {
        String msgID = new Date().getTime() + ".";
        msgID += Thread.currentThread().hashCode();
        msgID += hostName;
        msgID = "<"+msgID+">";
        return msgID;
    }

    /**
    * Establishes a connection to the specified SMTP server.
    *
    * @param server the SMTP server to connect to
    */
    public EasySMTPConnection(String server) throws InstantiationException {
        this.server = server;

        try {
            this.open();
        } catch(SocketTimeoutException e) {
            throw new InstantiationException("Timeout: " + e.getMessage());
        }
        catch(IOException e) {
            throw new InstantiationException("IO error: " + e.getMessage());
        }
    }

    /**
    * Opens the connection to the server stored in server.
    */
    protected void open() throws SocketTimeoutException, IOException {
        socket = new Socket(server, 25);
        socket.setSoTimeout(5000);
        socket.setKeepAlive(true);
        in = new BufferedReader(new InputStreamReader(socket.getInputStream()));
        out = new BufferedWriter(new OutputStreamWriter(socket.getOutputStream()));

        String response = read();

        if(!response.startsWith("220")) {
            throw new IOException(response);
        }

        writeln("HELO " + InetAddress.getByName(InetAddress.getLocalHost().getHostAddress())
           .getHostName());
        response = read();

        if(!response.startsWith("2")) {
            throw new IOException(response);
        }
    }

    /**
    * Close the connection.
    */
    public void close() {
        try {
            writeln("QUIT");
            socket.close();
        } catch(SocketTimeoutException e) {
        }
        catch(IOException e) {
        }
    }

    private String read() throws SocketTimeoutException, IOException {
        String line = in.readLine();

        return line;
    }

    private void writeln(String line) throws SocketTimeoutException, IOException {
        out.write(line);
        out.newLine();
        out.flush();
    }

    /**
    * Reads the server's response and checks the response code.
    *
    * @throws MailProtocolException if the code from the server is an error code (4xx or 5xx)
    * @throws SocketTimeoutException if there was a timeout while reading from the server
    * @throws IOException if there was some sort of network error
    */
    protected void checkResponse() throws MailProtocolException, SocketTimeoutException, IOException {
        String response = read();
        if(response.startsWith("4") || response.startsWith("5")) {
            throw new MailProtocolException(response);
        }
    }

    /**
    * Sends an array of Strings to the server. This method just constructs a new Message object
    * based on msgSource and then calls {@link #sendMessage(Message)}
    *
    * @param msgSource An array of Strings, each element containing one line of the message source.
    *                     Note that there has to be an empty line to seperate header and body of the message.
    *                     You don't have to (and you're not able to) end your message with a "." line, though.
    */
    public void send(String[] msgSource) throws MailProtocolException {
        Message msg = new Message(msgSource);
        this.sendMessage(msg);
    }

    /**
    * Sends a Message through the server corresponding to this instance of EasySMTPConnection.
    *
    * @param msg the Message to send
    * @throws MailProtocolException if the server replied an error to one of the commands
    */
    public void sendMessage(Message msg) throws MailProtocolException {
        if (msg.getMessageID()==null || msg.getMessageID().equals("")) {
            msg.setMessageID(EasySMTPConnection.createMessageID("yourserver.com"));
        }
        try {
            socket.setSoTimeout(10000);
            writeln("MAIL FROM:" + extractEmail(msg.getFrom()));
            checkResponse();

            StringTokenizer t = new StringTokenizer(msg.getTo(), ";,");
            while(t.hasMoreTokens()) {
                writeln("RCPT TO:" + extractEmail(t.nextToken()));
                checkResponse();
            }

            t = new StringTokenizer(msg.getCC(), ";,");
            while(t.hasMoreTokens()) {
                writeln("RCPT TO:" + extractEmail(t.nextToken()));
                checkResponse();
            }

            t = new StringTokenizer(msg.getBCC(), ";,");
            while(t.hasMoreTokens()) {
                writeln("RCPT TO:" + extractEmail(t.nextToken()));
                checkResponse();
            }

            writeln("DATA");
            checkResponse();
            for(int i = 0; i < msg.getHeader().length; i++) {
                writeln(encodeDot(msg.getHeader()[i]));
            }
            writeln("X-Sent-Through: EasySMTPConnection Java class (http://www.bitfolge.de/en)");
            writeln("");
            for(int i = 0; i < msg.getBody().length; i++) {
                writeln(encodeDot(msg.getBody()[i]));
            }
            writeln(".");
            checkResponse();
        } catch(IOException io) {
            throw new MailProtocolException(io);
        }
    }

    protected String extractEmail(String nameAndEmail) {
        String result = nameAndEmail;
        if(nameAndEmail.indexOf('<') > -1) {
            result = nameAndEmail.substring(nameAndEmail.indexOf('<') + 1, nameAndEmail.indexOf('>'));
        }
        return result;
    }

    protected String encodeDot(String line) {
        String result = line;
        if(line.startsWith(".")) {
            result = "." + result;
        }
        return result;
    }

    /**
    * Closes the connection to the server upon finalization.
    */
    public void finalize() {
        this.close();
    }
}

monster 2007-06-15 14:52 发表评论

一些JFreeChart设置

monster — Fri, 15 Jun 2007 06:47:00 GMT

只有注册用户登录后才能阅读该文。阅读全文

monster 2007-06-15 14:47 发表评论

log4j配置文件的位置(class文件的根目录下,或者源文件根根目录下)

monster — Fri, 15 Jun 2007 06:32:00 GMT

log4j配置文件的位置应该放在class文件的根目录下(或者源文件根根目录下),不要放在子目录下,否则会由于找不到log4j配置文件而出错.
一个quartz用的log4j配置文件内容如下:

#DEBUG用来定义输出级别，比DEBUG高的都可以输出，后面的stdout，File为输出日志的输出地方
log4j.rootLogger=DEBUG, stdout,FILE
#定义stdout输出的格式
log4j.appender.stdout=org.apache.log4j.ConsoleAppender
log4j.appender.stdout.layout=org.apache.log4j.PatternLayout
log4j.appender.stdout.layout.ConversionPattern=%c{1} - %m%n
#定义文件输出的格式
log4j.appender.FILE=org.apache.log4j.FileAppender
log4j.appender.FILE.File=d:\\log.txt
log4j.appender.FILE.Append=true
log4j.appender.FILE.layout=org.apache.log4j.PatternLayout
log4j.appender.FILE.layout.ConversionPattern=[send mail info] %d - %c -%-4r [%t] %-5p %c %x - %m%n

#其中，Log4j提供的appender有以下几种：
#org.apache.log4j.ConsoleAppender（控制台），
#org.apache.log4j.FileAppender（文件），
#org.apache.log4j.DailyRollingFileAppender（每天产生一个日志文件），
#org.apache.log4j.RollingFileAppender（文件大小到达指定尺寸的时候产生一个新的文件），
#org.apache.log4j.WriterAppender（将日志信息以流格式发送到任意指定的地方）

#其中，Log4j提供的layout有以下几种：
#org.apache.log4j.HTMLLayout（以HTML表格形式布局），
#org.apache.log4j.PatternLayout（可以灵活地指定布局模式），
#org.apache.log4j.SimpleLayout（包含日志信息的级别和信息字符串），
#org.apache.log4j.TTCCLayout（包含日志产生的时间、线程、类别等等信息）

# 下面是步骤，共10步

#1 定义了两个输出端
#log4j.rootLogger = debug, A1, A2
#2 定义A1输出到控制器
#log4j.appender.A1 = org.apache.log4j.ConsoleAppender
#3 定义A1的布局模式为PatternLayout
#log4j.appender.A1.layout = org.apache.log4j.PatternLayout
#4 定义A1的输出格式
#log4j.appender.A1.layout.ConversionPattern = %-4r [%t] %-5p %c - %m%n
#5 定义A2输出到文件
#log4j.appender.A2 = org.apache.log4j.RollingFileAppender
#6 定义A2要输出到哪一个文件
#log4j.appender.A2.File = D:\\hello.log
#7 定义A2的输出文件的最大长度
#log4j.appender.A2.MaxFileSize = 1KB
#8 定义A2的备份文件数
#log4j.appender.A2.MaxBackupIndex = 3
#9 定义A2的布局模式为PatternLayout
#log4j.appender.A2.layout = org.apache.log4j.PatternLayout
#10 定义A2的输出格式
#log4j.appender.A2.layout.ConversionPattern = %d{yyyy-MM-dd hh:mm:ss}:%p %t %c


#log4j.appender.R=org.apache.log4j.RollingFileAppender   //指定以文件的方式输出日志
#log4j.appender.R.File=c:/sys.html   //文件位置
#log4j.appender.R.MaxFileSize=500KB   //文件最大尺寸
#log4j.appender.R.MaxBackupIndex=1   //备份数
#log4j.appender.R.layout=org.apache.log4j.HTMLLayout   //文件的格式为Html格式
#log4j.appender.R.layout=org.apache.log4j.PatternLayout
#log4j.appender.R.layout.ConversionPattern=%d{yyyy-MM-dd   HH:mm:ss,SSS}   [%t]   [%c]   [%p]   -   %m%n

#输出格式
#%m 输出代码中指定的消息
#%p 输出优先级，即DEBUG，INFO，WARN，ERROR，FATAL
#%r 输出自应用启动到输出该log信息耗费的毫秒数
#%c 输出所属的类目，通常就是所在类的全名
#%t 输出产生该日志事件的线程名
#%n 输出一个回车换行符，Windows平台为“\r\n”，Unix平台为“\n”
#%d 输出日志时间点的日期或时间，默认格式为ISO8601，也可以在其后指定格式，比如：%d{yyy MMM dd HH:mm:ss,SSS}，输出类似：2002年10月18日 22：10：28，921
#%l 输出日志事件的发生位置，包括类目名、发生的线程，以及在代码中的行数。举例：Testlog4.main(TestLog4.java:10)

#一个教程网址：http://www.solol.org/technologic/java/j-log4j/

monster 2007-06-15 14:32 发表评论

java发送邮件,举例http://jakarta.apache.org/commons/email/userguide.html(zz),注意要设置字符集

monster — Fri, 15 Jun 2007 03:33:00 GMT

http://jakarta.apache.org/commons/email/userguide.html.
注意要设置字符集
email.setCharset("gb2312");

monster 2007-06-15 11:33 发表评论

java设置代理

monster — Fri, 15 Jun 2007 02:58:00 GMT

Properties props = System.getProperties();
props.setProperty("proxySet", "true");
props.setProperty("http.proxyHost", "192.168.0.200");
props.setProperty("http.proxyPort", "3128");

monster 2007-06-15 10:58 发表评论