其他

知识

1. ThreadLocalMap里Entry为何声明为WeakReference

类型

1. 值类型(long)和引用类型(Long)的区别。值类型比较用==，引用类型比较必须用equal。
2. Boolean的变量定义不要有is，如isOn用on。表结构字段还是要有is.参考
3. BigDecimal的相等比较。 scale(小数点后数量)的不同，compareTo忽略scale，equals要比较scale

   BigDecimal bd1 = new BigDecimal("1.00");
   Assert.assertFalse(BigDecimal.ONE.equals(bd1));
   Assert.assertTrue(BigDecimal.ONE.compareTo(bd1) == 0);
   

技术

RSA与AES混合加密算法的实现

CSV(excel)

• http://opencsv.sourceforge.net/
• https://www.callicoder.com/java-read-write-csv-file-opencsv/
• http://zetcode.com/articles/opencsv/
• https://www.geeksforgeeks.org/writing-a-csv-file-in-java-using-opencsv/

SCP

• https://github.com/hierynomus/sshj/blob/762d088388667ec29eb7c81c725b33f0f3cffe78/src/main/java/net/schmizz/sshj/SSHClient.java

  client.authPassword(username, password);
  final Session session = client.startSession();
  try {
  final Command cmd = session.exec(true);
  cmd.join(1, TimeUnit.SECONDS);
  } finally {
  session.close();
  }
  

FTP

• https://www.jianshu.com/p/d4c6f3ec56d5
• https://blog.csdn.net/u012506466/article/details/73558134
• https://blog.csdn.net/weixin_36907025/article/details/77152446