Many real-world Java2Platform, Enterprise Edition (J2EE) applications need to use persistent data at some point.
许多投入使用的,J2EE WEB 应用程序在一些时候需要进行数据的持久化.
2
Println statements are quick and convenient but they do not offer the power of a full-featured logging system. Table 2 lists logging libraries for the Javaplatform