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接口中可以含有 变量和方法。但是要注意,接口中的变量会被隐式地指定为 public static final 变量(并且只能是 public static final变量,用 private 修饰会报编译错误),而方法会被隐式地指定为 public abstract 方法且只能是 public ab 阅读全文
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sqlselect * from StnInfo,ClassInfo where StnInfo.cid=ClassInfo.Id gocreate proc del_class @id int as begin tran declare @error int=0 delete from StnIn 阅读全文
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public class DBHelper { //连接数据库 static SqlConnection conn = new SqlConnection("Data Source=DESKTOP-H22HG80\\SQL2014;Initial Catalog=Unity6;Integrated 阅读全文
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document.getElementById() id document.getElementsByClassName() class document.getElementsByName() name document.getElementsByTagName() < document.quer 阅读全文