基于Android的简单聊天工具-服务器端

博观而约取，厚积而薄发。这篇文章主要讲述基于Android的简单聊天工具-服务器端相关的知识，希望能为你提供帮助。
1、数据库用的mysql，一共有3张表，一张用户表user、一张朋友列表friend和一张消息表message。

1 User table用户表 uid主键自动生成 userName昵称 userPwd密码 userSex性别 userPho用户头像，有默认头像 2 Friend table好友列表 fid主键自动生成 uid --> fk用户id，外键 fuid --> 朋友的id fName好友名称 3 Messages table消息表 mid消息id，主键自动生成 fromid --> fk from id发送者id tofid --> fk to id接收者id msg消息内容 mtime发送时间

2、服务器端架构

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3、model包解析

public class User{//1 用户类 private String userName; //用户名 private String userPwd; //用户密码 private String userSex; //用户性别 private String userPho; //用户照片 ... public class Friend {//2 朋友类 private int uid; //用户id private int fuid; //friend id private String fName; //用户的朋友名字 ... public class FriendList extends ArrayList< Friend> {//3 朋友列表类 /** * */ private static final long serialVersionUID = 1L; privateFriendList friendlist; public FriendList() { friendlist = null; } }

public class Messages{//4 消息类 private int fromId; private int toId; private String msg; private String mtime; public Messages() {}

4、db包解析
主要作用是加载类，获取mysql数据库的连接

public class DBConnection { public static final String DBURL = "jdbc:mysql://localhost:3306/qq"; public static final String DBUSER = "root"; public static final String DBPASS = "root"; public static final String DBDRIVER = "com.mysql.jdbc.Driver"; static { try { Class.forName(DBDRIVER); //加载类 } catch (ClassNotFoundException e) { e.printStackTrace(); } } //返回Connection public Connection getConnect() throws SQLException{ return DriverManager.getConnection(DBURL,DBUSER,DBPASS); } //关闭资源 public void close(Connection con, Statement sta, ResultSet rs) { try { rs.close(); if(con != null) { con.close(); } if(sta != null) { sta.close(); } } catch (SQLException e) { e.printStackTrace(); } } }

5、util包解析
第一个类Packager

public class Packager { //用于登录数据包的分析 public String loginPackager(String operate,String friends,String result) { StringBuffer mes = new StringBuffer(""); mes.append("operate:" + operate + "\\n"); mes.append("content:" + friends); mes.append("result:" + result + "\\n"); return mes.toString(); } //用于发送数据包的分析 public String sendPackager(String operate,String msg,String result) { StringBuffer mes = new StringBuffer(""); mes.append("operate:" + operate + "\\n"); mes.append("content:" + "\\n"); mes.append("result:" + result + "\\n"); return mes.toString(); } }

第二个类Parser

public class Parser { //解析类 //用于解析获取的请求类型是什么，比如登录、发送消息 public String getOperate(String request) { String[] message = request.split("\\n"); String operate = message[0].substring(8,message[0].length()); return operate; } //获取内容 public String getContent(String request) { String[] message = request.split("\\n"); String content = message[1].substring(8,message[1].length()); return content; } //获取发送的消息 public Messages parseMessages(String content) { String[] mes = content.split("#"); int toId = Integer.parseInt(mes[0]); String message = mes[1]; Messages msg = new Messages(); msg.setToId(toId); msg.setMsg(message); return msg; } //将字符串解析为用户类，返回用户类 public User parseUser(String content) { //分隔符为# String[] mes = content.split("#"); //第一个是用户名，第二个是密码 String userName = mes[0]; String userPwd = mes[1]; User user = new User(); user.setUserName(userName); user.setUserPwd(userPwd); return user; } }

6、controll包解析
controller类解析

//控制器 public class Controller { //无参构造函数 public Controller() { } //相应请求 public String doResponse(String request,String ip) { Parser parser = new Parser(); String operate = parser.getOperate(request); //用于解析用户的请求操作是什么 String content = parser.getContent(request); //获取请求的内容 String response = null; //相应字符串 String friends = null; //朋友 if("login".equals(operate)) {//判断是否是登录请求 intuid = login(content); //返回该用户的id，如果没有该用户返回0 String result = null; if(uid != 0) { //将该用户的主键和ip地址加入管理客户端类中 ManageClients.addIps(new Integer(uid), ip); result = "success"; //如果登陆成功，那么获得该用户的所有朋友列表 friends = getFriends(uid); }else{ result = "fail"; //登录失败 } Packager packager = new Packager(); response = packager.loginPackager(operate,friends,result); }else if("sendMessage".equals(operate)) {//如果是发送消息 Messages msg = parser.parseMessages(content); int toId = msg.getToId(); //找到要接受者的id String ipaddress = ManageClients.ips.get(new Integer(toId)).toString(); //通过id 获得ip地址 ServerThread sendto = (ServerThread)ManageClients.clients.get(ipaddress); //通过ip地址获取接受者的线程 sendto.send(msg.getMsg()); //向发送端发送信息 Packager packager = new Packager(); String result = "success"; response = packager.sendPackager(operate,null,result); } return response; } public String getFriends(int uid) { String sql = "select fid,uid,fuid,fName from friend where uid=" + uid; DBConnection dbc = new DBConnection(); Connection con = null; Statement sta = null; ResultSet rs = null; StringBuilder sb = new StringBuilder(""); try { con = dbc.getConnect(); con = dbc.getConnect(); sta = con.createStatement(); rs = sta.executeQuery(sql); while(rs.next()) { sb.append(rs.getInt(1)+"#" + rs.getInt(2) + "#" + rs.getInt(3) + "#" + rs.getString(4) + "\\n"); } } catch (SQLException e) { e.printStackTrace(); } return sb.toString(); } public int login(String content) {//登录操作，登陆成功，返回朋友列表，否则返回错误原因 Parser parser = new Parser(); User user = parser.parseUser(content); //获取用户类 //然后去数据库中查询是否有该用户，如果有该用户，那么返回该用户的主键id String sql = "select uid,userPwd from user where userName=\'" + user.getUserName() +"\'"; DBConnection dbc = new DBConnection(); Connection con = null; Statement sta = null; ResultSet rs = null; String dbpwd = null; int uid = 0; try { con = dbc.getConnect(); sta = con.createStatement(); rs = sta.executeQuery(sql); while(rs.next()) { uid = rs.getInt(1); dbpwd = rs.getString(2); } } catch (SQLException e) { e.printStackTrace(); }finally{ dbc.close(con, sta, rs); } if(dbpwd != null & & dbpwd.equals(user.getUserPwd()) & & uid != 0) { return uid; }else{ uid = 0; return uid; } }

7、server包解析
7.1 Server类开启监听端口，不断监听请求的用户

public class Server { public static void main(String[] args) { new Server(); } public Server() { ServerSocket serversocket = null; Socket socket = null; try { serversocket = new ServerSocket(5000); System.out.println("服务器已经启动，正在监听5000端口"); while(true) { socket = serversocket.accept(); String ip = socket.getLocalAddress().getHostAddress(); ServerThread st = new ServerThread(socket,ip); //服务器端线程 st.start(); ManageClients.addClients(ip, st); //将该线程添加到ManageClients类中 int port = socket.getPort(); System.out.println("连接上的客户端ip:" + ip + ",端口号:" + port); } } catch (IOException e) { e.printStackTrace(); } } }

7.2 ServerThread类，用于转发消息

public class ServerThread extends Thread{ private Socket socket; private String ip; private InputStream in; private OutputStream out; private static final int SIZE = 1024; public Socket getSocket(){ return socket; } public ServerThread(Socket socket,String ip) { this.socket = socket; this.ip = ip; try { in = socket.getInputStream(); out = socket.getOutputStream(); } catch (IOException e) { e.printStackTrace(); } } public void send(String mes) { try { out.write(mes.getBytes()); out.flush(); } catch (IOException e) { e.printStackTrace(); } } public void close() { try { if(in != null){ in.close(); in = null; } if(out != null) { out.close(); out = null; } if(socket != null) { socket.close(); socket = null; } } catch (IOException e) { e.printStackTrace(); } } public void run() { while(true) { try { byte[] buffer = new byte[SIZE]; int index = in.read(buffer); String message = new String(buffer,0,index); //获取客户端发送过来的请求 Parser parser = new Parser(); String operate = parser.getOperate(message); Controller controller = new Controller(); if(operate.equals("exit")) { break; }String response = controller.doResponse(message,ip); //服务器处理发送过来的消息，如果不是收获 //的操作不是exit if(response != null) send(response); //向客户端发送请求操作的结果 } catch (IOException e) { e.printStackTrace(); }finally{ close(); } } }

7.3 ManageClients

public class ManageClients { //管理客户端，用HashMap存储用户ip和线程的键值对 publicstatic HashMap< String,ServerThread> clients = new HashMap< String,ServerThread> (); //string sender //用于用户主键和ip之间的键值对 publicstatic HashMap< Integer,String> ips = new HashMap< Integer,String> (); public staticvoid addClients(String senderip, ServerThread st) { clients.put(senderip, st); } public static void addIps(Integer i, String ip) { ips.put(i, ip); } }

服务器端结束，启动Server中的main 函数，监听是否有客户端请求
【基于Android的简单聊天工具-服务器端】