###一个带有客户端和服务器的简单聊天程序####用java编写
汇编：
javac *.java
服务器使用：
java Server
客户端使用：
java Client
为了支持多个并发客户端，客户端被视为线程。 每次新客户端连接时，都会创建一个新的并发线程来支持该客户端的任何活动。
我使用的 Server 的初始实现没有同步任何共享数据，主要是存储消息的 ArrayList。 这导致服务器出现问题，并间接导致客户端出现问题。 如果客户端尝试在另一个客户端获取或发送消息的同时获取其消息，则消息将被锁定。 用于访问消息的同步块修复了该问题。
完成任务，如张贴。
2021-06-11 11:05:57
4KB
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/*
* JCatalog Project
*/
package com.hexiang.utils;
import java.util.List;
import java.util.ArrayList;
import java.util.Date;
import java.util.Iterator;
import java.util.Properties;
import javax.mail.Session;
import javax.mail.Transport;
import javax.mail.Message;
import javax.mail.internet.InternetAddress;
import javax.mail.internet.MimeMessage;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import com.hexiang.exception.CatalogException;
/**
* Utility class to send email.
*
* @author hexiang
*/
public class EmailUtil {
//the logger for this class
private static Log logger = LogFactory.getLog("com.hexiang.util.EmailUtil");
/**
* Send email to a single recipient.
*
* @param smtpHost the SMTP email server address
* @param senderAddress the sender email address
* @param senderName the sender name
* @param receiverAddress the recipient email address
* @param sub the subject of the email
* @param msg the message content of the email
*/
public static void sendEmail(String smtpHost, String senderAddress, String senderName,
String receiverAddress, String sub, String msg) throws CatalogException {
List recipients = new ArrayList();
recipients.add(receiverAddress);
sendEmail(smtpHost, senderAddress, senderName, recipients, sub, msg);
}
/**
* Send email to a list of recipients.
*
* @param smtpHost the SMTP email server address
* @param senderAddress the sender email address
* @param senderName the sender name
* @param recipients a list of receipients email addresses
* @param sub the subject of the email
* @param msg the message content of the email
*/
public static void sendEmail(String smtpHost, String senderAddress, String senderName,
List recipients, String sub, String msg) throws CatalogException {
if (smtpHost == null) {
String errMsg = "Could not send email: smtp host address is null";
logger.error(e
2021-05-25 17:37:55
1KB
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