java swing 多线程下载数据库blob文件。（这是工作中的自己写的，下载后自己要修改。）-Java Swing multi thread download blob file. (this is the work of his writing, download after they have to change.

java代码，连接mysql数据库，并对大数据类型(CLOB和BLOB进行处理)-Java code, connect to the MySQL , and the large data types (BLOB and CLOB for processing)