摘要：
这种问题最好的解决方案就是看文档和源码！在目前的JDK实现中HashMap和Hashtable是很相似的(The HashMap class is roughly equivalent to Hashtable, except that it is unsynchronized and permit 阅读全文
摘要：
对应的DAO层 int insertOrderBatch(List<Order> list); 批量插入mapper: <insert id="insertOrderBatch" parameterType="java.util.List"> insert into table_order (id, 阅读全文