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原创 t_user is not mapped [from t_user as u where u.loginname = :loginname and u.password =:password]
错误:Struts Problem ReportStruts has detected an unhandled exception: Messages:t_user is not mapped [from t_user as u where u.loginname = :loginname and u.password =:password]Fil
2016-10-01 02:23:10 3844
原创 ==和equals比较
public class Test{public static void main(String[] args) {String s1="abc";String s2="abc";String s3=new String("abc");String s4=new String("abc");System.out.println(s1==s2);System.out
2016-01-23 00:43:11 193
原创 if相关训练
If语句相关训练 1. (标识符命名)下面几个变量中,那些是对的?那些是错的?错的请说明理由 (CDF)A. ILoveJava B. $20 C. learn@java D. antony.lee E. Hello_World F. 2tigers 答:标识符中不能有@,不能含有点号,开头只能是字母和$ 2. (Java 程序的编译与运行)假设有
2015-04-13 21:22:26 828
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