The first thing you do is instantiate a Persister object.
第一件事就是实例化一个Persister对象。
The persister calls the batcher to perform the JDBC prepare and execute operations.
持续程序调用批处理程序来执行JDBC准备和执行操作。
The current version of the Integration Module does not support heterogeneous batching of SELECT statements, so they do not flow through the custom batcher and persister.