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  • 2016.3.16_ArrayList与String()【笔记】

        if( null != temUserName ){ 
                //需要增加的用户名称
                String[] userNamesArr = temUserName.split(",");  
                //将他们放进一个ArrayList
                List<String> addnew = new ArrayList<String>();
                for(int i=0;i<userNamesArr.length;i++){
                String userName = userNamesArr[i];
                addnew.add(userName); 
                }  
                 
                //取得已有的用户名称
                List<GroupUserEntity> existNamesArr = groupUserManagementServiceImpl.queryExistGroupUsersListPage(groupId); 
                //将他们放进一个ArrayList
                List<String> alreadyexist = new ArrayList<String>();
                  for(int j=0;j<existNamesArr.size();j++){ 
                    String existName = existNamesArr.get(j).getUserName();
                    alreadyexist.add(existName); 
                 } 
                  //两个数组对比去重
                  addnew.removeAll(alreadyexist); 
                  String[] userNamesArr1 = (String[])addnew.toArray(new String[addnew.size()]); 
                  
                this.groupUserManagementServiceImpl.InsertUsesToGroup(userNamesArr1, groupId);
                return Constants.SUCCESS_CODE;
            }
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  • 原文地址:https://www.cnblogs.com/fieldcatalog/p/5282153.html
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