File list (Check if you may need any files):
chat3
.....\.classpath
.....\.project
.....\.settings
.....\.........\org.eclipse.jdt.core.prefs
.....\bin
.....\...\com
.....\...\...\shengsiyuan
.....\...\...\...........\chat
.....\...\...\...........\....\client
.....\...\...\...........\....\......\ChatClient$1.class
.....\...\...\...........\....\......\ChatClient$2.class
.....\...\...\...........\....\......\ChatClient$3.class
.....\...\...\...........\....\......\ChatClient.class
.....\...\...\...........\....\......\Client$1.class
.....\...\...\...........\....\......\Client.class
.....\...\...\...........\....\......\ClientConnection.class
.....\...\...\...........\....\server
.....\...\...\...........\....\......\Server$1.class
.....\...\...\...........\....\......\Server$2.class
.....\...\...\...........\....\......\Server.class
.....\...\...\...........\....\......\ServerConnection.class
.....\...\...\...........\....\......\ServerMessageThread.class
.....\...\...\...........\....\util
.....\...\...\...........\....\....\CharacterUtil.class
.....\...\...\...........\....\....\XMLUtil.class
.....\...\...\...........\....\....\XMLUtilTest.class
.....\src
.....\...\com
.....\...\...\shengsiyuan
.....\...\...\...........\chat
.....\...\...\...........\....\client
.....\...\...\...........\....\......\ChatClient.java
.....\...\...\...........\....\......\Client.java
.....\...\...\...........\....\......\ClientConnection.java
.....\...\...\...........\....\server
.....\...\...\...........\....\......\Server.java
.....\...\...\...........\....\......\ServerConnection.java
.....\...\...\...........\....\......\ServerMessageThread.java
.....\...\...\...........\....\util
.....\...\...\...........\....\....\CharacterUtil.java
.....\...\...\...........\....\....\XMLUtil.java
.....\test
.....\....\com
.....\....\...\shengsiyuan
.....\....\...\...........\chat
.....\....\...\...........\....\util
.....\....\...\...........\....\....\XMLUtilTest.java