www.pudn.com > zhanglongChat.zip > CharacterUtil.java

package com.project.util; 
 
import java.util.*; 
import java.net.*; 
 
public class CharacterUtil 
{ 
    public static final String ERROR = "ERROR"; 
    public static final String SUCCESS = "SUCCESS"; 
    public static final int PORT = generatePort(); 
    public static final int PORT2 = generatePort(); 
    public static String CLIENT_NAME; 
    public static String SERVER_PORT;  //服务器端口号信息 
    public static String SERVER_HOST;  //服务器地址信息 
    public static int randomPort = generatePort();   //接收消息的端口号 
    public static int randomPort2 = generatePort();  //接收用户列表的端口号 
    /** 
     *判断是否为空,为空返回true，否则返回false 
     */ 
    public static boolean isEmpty(String str) 
    { 
        if("".equals(str.trim())) 
        { 
            return true; 
        } 
        return false; 
    } 
     
   /** 
    *判断字符串中是否包含@与/符号 
    */ 
     
    public static boolean isCorrect(String str) 
    { 
        for(int i = 0 ; i < str.length() ; i++) 
        { 
            char ch = str.charAt(i); 
            if('@' == ch || '/' == ch) 
            { 
                return false; 
            } 
           
        } 
        return true; 
    } 
     
    /** 
     *判断服务器端口号是否在正确范围内 
     * 
     */ 
     
    public static boolean isPortCorrect(String port) 
    { 
        int temp = Integer.parseInt(port); 
        if(temp <= 1024 || temp > 65535) 
        { 
            return false; 
        } 
        return true; 
    } 
     
     
    /** 
     *判断是否为数字，是数字返回true，否则返回false 
     */ 
    public static boolean isNumber(String str) 
    { 
        for(int i = 0 ; i < str.length() ; i++) 
        { 
            if(!Character.isDigit(str.charAt(i))) 
            { 
                return false; 
            } 
        } 
        return true; 
    } 
     
    /** 
     *判断服务器上的用户列表是否有重名，有返回true，没有返回false 
     * 
     */ 
     
    public static boolean isUsernameDuplicated(Map map,String username) 
    { 
        for(Iterator i = map.keySet().iterator();i.hasNext();) 
        { 
            String temp = (String)i.next(); 
            if(username.equals(temp)) 
            { 
                return true; 
            } 
             
        } 
        return false; 
    } 
     
     
     
    /** 
     * 产生随机的端口号,该随机端口号大于等于1025 
     */ 
     
     
    public static int generatePort() 
    { 
        int port = (int)(Math.random() * 50000 + 1025); 
        return port; 
    } 
     
    public static int[] string2Array(String str) 
    { 
        int[] result = new int[2]; 
        int index =  str.indexOf("_"); 
        result[0] = Integer.parseInt(str.substring(0,index)); 
        result[1] = Integer.parseInt(str.substring(index + 1)); 
         
        return result; 
         
    } 
}