List 集合转换为String

开发中会用到把 List<string>  的内容拼接成以逗号分隔的字符串的形式,现总结如下:

 

方法一:

public String listToString(List list, char separator) {    
    StringBuilder sb = new StringBuilder();    
    for (int i = 0; i < list.size(); i++) {                
                 sb.append(list.get(i)).append(separator);    
           }    
            return sb.toString().substring(0,sb.toString().length()-1);
     }    

 

 

方法二:

public String listToString(List list, char separator) {    
    StringBuilder sb = new StringBuilder();    
    for (int i = 0; i < list.size(); i++) {        
        if (i == list.size() - 1) {            
           sb.append(list.get(i));        
        } else {            
          sb.append(list.get(i));            
          sb.append(separator);        
        }   
     }    
  return sb.toString();}

 

 

方法三:

public String listToString(List list, char separator) {    
  return org.apache.commons.lang.StringUtils.join(list.toArray(),separator);
}

 

posted @ 2017-10-26 21:11  Mr_伍先生  阅读(49420)  评论(0编辑  收藏  举报