摘要： 如果tar不支持j这个参数就先用bzip2 -d xxx.tar.bz2把它解压成.tar文件，然后再用tar xvf xxx.tar拆包。压缩解压linux下怎么解后缀名是gzip的文件？1.以.a为扩展名的文件:#tar xv file.a2.以.z为扩展名的文件:#uncompress file.Z3.以.gz为扩展名的文件:#gunzip file.gz4.以.bz2为扩展名的文件:#bunzip2 file.bz25.以.tar.Z为扩展名的文件:#tar xvZf file.tar.Z或 #compress -dc file.tar.Z | tar xvf -6.以.tar.gz/ 阅读全文

摘要： 今天在做报表查询的时候Oracle报错：信息为 ORA-01810: format code appears twice原因：由于想java一样转化时间格式，但是Oracle中是不区分大小写的，所以格式最终为select count(*) as k2 ,t.cityid as k1 fromportal_user t wheret.createtime >= to_date(#YbeginTime#,'yyyy-mm-dd HH24:mi:ss')and to_date(#YendTime#,'yyyy-mm-dd HH24:mi:ss')>=t.c 阅读全文

摘要： Here Mudassar Ahmed Khan has explained how to pass value from child popup window to parent page window using JavaScript.The child popup window must be opened using JavaScript window.open function. And in such case we can access the parent page controls using JavaScript window.opener instance.In this 阅读全文

摘要： In this tutorial we will discuss about different types of questions that can be used in a Java interview, in order for the employer to test your skills in Java and object-oriented programming in general.In the following sections we will discuss about object-oriented programming and its characteristi 阅读全文