In the process of Java application development, developers may come across massive structured data computing. These structured data is not stored in database but in Excel, text or other sources. In order to perform such computing, developers can import the data into database manually and then compute with SQL database. Or they can automatically import data to database at a specified time with ETL tool. Another method is using the Java language directly. But these are all not ideal methods and bring a lot of workload.
Jul 10, 13