一、有什么问题吗 java.util.Date？ java.util.Date（Date 从现在开始）是一个糟糕的类型，这解释了为什么它的大部分内容在 Java 1.1 中被弃用（但不幸的是仍在使用）。 设计缺陷包括： 它的名称具有误导性：它并不代表一个日期，而是代表时间的一个瞬间。所以它 ...

MySQL provides connectivity for client applications developed in the Java programming language with MySQL Connector/J, a driver that implements the Java Database Connectivity (JDBC) API and also MySQL ...

A set of Java annotations which can be used in JVM-based languages. They serve as an additional documentation and can be interpreted by IDEs and static analysis tools to improve code analysis.