java List转换为字符串并加入分隔符的一些方法总结

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);}public String listToString(List list, ch