摘要:
java.lang.ExceptionInInitializerError at cn.itcast.a_one2many.Demo.fun1(Demo.java:17) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) a 阅读全文
摘要:
1,MySQL中是char类型时,在java中要用Character包装类 2,MySQL中是varchar类型时,在java中要用String型 3,MySQL中是bigint类型时,在java中要用Long型 阅读全文