问题描述给一个使用Arrays.asList转换过来的list添加东西： String[] array = "aa,bb,cc".split(",");List<String> list = Arrays.asList(array);list.add("dd"); // 这里会报错 结果： java.lang.UnsupportedOperationException ... 阅读全文

现象描述报错： Caused by: com.mysql.jdbc.PacketTooBigException: Packet for query is too large (2662 > 1024). You can change this value on the server by setting the max_allowed_packet' variable. at com... 阅读全文