java POP3
package com.skyzoo.Jutil;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.PrintStream;
import java.net.Socket;
import java.util.Vector;
public class Jpop3 {
// 用户名
private String username = "";
// 密码
private String password = "";
// Pop服务器名
private String pop3Host = "";
// 设置标志位
public Vector recvMails = new Vector();
private boolean delete = true;
private boolean secure = false;
public void setPop3Host(String pop3Host) throws Exception
{
this.pop3Host = pop3Host.trim();
};
public void setUser(String username, String password) throws
Exception {
this.username = username.trim();
this.password = password.trim();
};
private void log(String log) {
System.out.println(log);
}
public void setDelete(boolean delete) {
this.delete = delete;
}
public static void main(String argv[]) {
Jpop3 jpop3 = new Jpop3();
try {
jpop3.setPop3Host("pop.ym.163.com");
jpop3.setUser("saicmotor@mynms.cn", "abcd1234");
jpop3.setDelete(false);
jpop3.recvin();
} catch (Exception e) {
e.printStackTrace();
}
}
public boolean recvin() {
BufferedReader in; // 从套接字中读取文本
PrintStream out; // 将文本写入套接字
Socket s;
String line;
String numberMessages;
try {
if (pop3Host.equals("")) {
return false;
}
if (username.equals("")) {
return false;
}
log("Connecting to " + pop3Host + " ...");
// Pop3服务默认使用110端口
// 建立TCP连接
s = new Socket(pop3Host, 110);
log("Connected\nAuthentication in progress...");
// 连接建立成功，获得关联的输入流和输出流
in = new BufferedReader(new
InputStreamReader(s.getInputStream()));
out = new PrintStream(s.getOutputStream());
// 着一行响应是服务器的欢迎信息，可抛弃
line = readFromInputStream(in);
// 发送用户名
printToOutputStream(out, "USER " + username);
// 如果用户不存在，则响应信息开头有+OK字样。否则退出
if (!readFromInputStream(in).startsWith("+OK")) {
log("Wrong user name， disconnecting");
s.close();
return false;
}
// 用户名存在，则发送密码
out.println("PASS " + password);
log("R: PASS ********");
// 读服务器响应信息
line = readFromInputStream(in);
// 如果密码核对成功，响应信息中开头+OK字样
if (!line.startsWith("+OK")) {
// 密码不正确，无法继续
log("Wrong password， disconnecting");
s.close();
return false;
}
// 命令STAT
printToOutputStream(out, "STAT");
// 读取响应
line = readFromInputStream(in);
if (!line.startsWith("+OK")) {
// 如果命令执行失败，则退出
System.out.println("Error:" + line);
s.close();
return false;
}
// 从统计信息中抽取消息个数
int i = line.lastIndexOf(' ');
numberMessages = line.substring(4, i);
log("You have " + numberMessages + " message(s) in your
mailbox");
// 获取消息个数
int n = Integer.parseInt(numberMessages);
int numberBytes;
// 取出服务器上的每一个消息
for (int msg = 1; msg <= n; msg++) {
mail_t one_mail = new mail_t();
log("Retreaving message " + msg);
// 命令RETR 用于收取消息
printToOutputStream(out, "RETR " + msg);
// 从服务器读取消息
line = readFromInputStream(in);
if (!line.startsWith("+OK")) {
System.out.println("Error: " + line);
s.close();
return false;
}
// 消息已“.”号结束，一行中连续两个"."代表"."
log(line);
line = "";
log("**************---------------------------");
line = in.readLine();
while (line.compareTo(".") != 0) {
if (line.compareTo("..") == 0)
log(".");
else {
log(line);
processLine(one_mail, line);
log("---------------------------**************");
}
// 读取下一行
line = in.readLine();
}
// 消息已读取到本地，从服务器删除消息
// 删除消息的命令是DELE [messagenumber]
if (this.delete == true) {
printToOutputStream(out, "DELE " + msg);
readFromInputStream(in);
}
one_mail.echo();
recvMails.add(one_mail);
}
// 准备退出，使用QUIT命令
printToOutputStream(out, "QUIT");
readFromInputStream(in);
// 关闭套接字
s.close();
} catch (IOException e) {
e.printStackTrace();
} catch (Exception e) {
e.printStackTrace();
}
return true;
}
void processLine(mail_t one_mail, String line) {
line = line.trim();
if (line.startsWith("Received:")) {
one_mail.Received = line.substring(9).trim();
} else if (line.startsWith("Date:")) {
one_mail.Date = line.substring(5).trim();
} else if (line.startsWith("From:")) {
one_mail.From = line.substring(5).trim();
} else if (line.startsWith("To:")) {
one_mail.To = line.substring(3).trim();
} else if (line.startsWith("Message-ID:")) {
} else if (line.startsWith("Subject:")) {
one_mail.Subject = line.substring(8).trim();
} else if (line.startsWith("MIME-Version:")) {
} else if (line.startsWith("Content-Type:")) {
}
}
// 方法printToOutputStream()向SMTP服务器发送命令
void printToOutputStream(PrintStream out, String s) throws
IOException {
log("S : " + s);
out.println(s);
return;
}
// 方法readFromInputStream()接收从SMTP服务器发回的响应信息
String readFromInputStream(BufferedReader in) throws
IOException {
String s = in.readLine();
if (s != null)
log("R :" + s);
return s;
}
public boolean isContainSubject(String subject){
for(int i=0;i
if(this.recvMails.get(i).Subject.equals(subject)){
return true;
}
}
return false;
}
}
class mail_t {
String Received = "";
String Date = "";
String From = "";
String To = "";
String Subject = "";
String Text = "";
String Html = "";
String all = "";
public void echo() {
String line = "";
line += "Received==='" + Received + "'\n";
line += "Date==='" + Date + "'\n";
line += "From==='" + From + "'\n";
line += "To==='" + To + "'\n";
line += "Subject==='" + Subject + "'\n";
System.out.println(line);
}
}
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