动态调用 JAVA CLASS/JAR，不是难事。只是随便搜索了一下，没有完整的过程。於是，综合了一下，写不个综合的范例，以便提供参考 -Dynamic invocation JAVA CLASS/JAR, not be difficult. Just search a little, did not complete the process. Thus, a combination of what is written is not an example of integrated so