package com.yanek.test;

import java.util.ArrayList;

import java.util.Collections; import java.util.HashMap; import java.util.HashSet; import java.util.Iterator; import java.util.List; import java.util.Map; import java.util.Set;

public class Test {

 /**

  * @param args   */  public static void main(String[] args) {

        //去掉重复的数字,返回list

     String ids="5;4;11;5;2;3;4;1;5;3";   List idlist=getIdList1(ids,";");   Collections.sort(idlist);   System.out.println("idlist1:"+idlist);   List idlist2=getIdList2(ids,";");   Collections.sort(idlist2);   System.out.println("idlist2:"+idlist2);

 }

     /**   * 获取ID列表   * @param param   * @param regex   *   * Exception   */  public static List getIdList1(String param, String regex) {      if (param == null || regex == null)    return null;      Set idSet = null;      String[] ids = param.split(regex);   if (ids != null) {    for (int i = 0; i < ids.length; i++) {     String id = ids[i];     if (id != null && id.trim().length() > 0) {      if (idSet == null) {       idSet = new HashSet();      }      idSet.add(new Integer(id.trim()));     }    }   }   return idSet == null ? null : Collections.list(Collections.enumeration(idSet));  }        /**   * 获取ID列表   * @param param   * @param regex   *   * Exception   */  public static List getIdList2(String param, String regex) {      if (param == null || regex == null)    return null;   List list=new ArrayList();   Map idmap=new HashMap();      String[] ids = param.split(regex);   if (ids != null) {    for (int i = 0; i < ids.length; i++) {     String id = ids[i];     if (id != null && id.trim().length() > 0) {                           if (!idmap.containsKey(id))                     {          list.add(new Integer(id.trim()));          idmap.put(id,new Integer(id.trim()));                     }                     else                     {                      continue;                     }     }    }   }   return list;  }

}