這篇寫的挺全
http://www.cnblogs.com/hui-blog/p/6375174.html
實際項目經常用到的
方法1
String symbol = Joiner.on(",").join(symbolList);
方法2:
String symbol = StringUtils.join(symbolList.toArray(), ",");
用來代替下面的方法
StringBuffer sb = new StringBuffer();
for(Object _symbol : symbolList){
sb.append("'").append(_symbol).append("',");
}