<?xml version="1.0" encoding="utf-8" ?><rss version="2.0"><channel><title><![CDATA[FJJJ8的专栏]]></title><description><![CDATA[]]></description><link>https://blog.youkuaiyun.com/FJJJ8</link><language>zh-cn</language><generator>https://blog.youkuaiyun.com/</generator><copyright><![CDATA[Copyright &copy; FJJJ8]]></copyright><item><title><![CDATA[12个数组操作方法]]></title><link>https://blog.youkuaiyun.com/FJJJ8/article/details/84884467</link><guid>https://blog.youkuaiyun.com/FJJJ8/article/details/84884467</guid><author>FJJJ8</author><pubDate>Fri, 05 May 2017 17:39:05 +0800</pubDate><description><![CDATA[下面是stackoverflow中关于数组方法的相关问题中，获得最多票数的12个数组操作方法。 

1.  声明一个数组 




Java代码 复制代码
1.String[] aArray = new String[5];  
2.String[] bArray = {&quot;a&quot;,&quot;b&quot;,&quot;c&quot;, &quot;d&quot;, &quot;e&quot;};  
3.String[] cArray = new Stri...]]></description><category></category></item><item><title><![CDATA[Shell中 done 后接一个重定向< ]]></title><link>https://blog.youkuaiyun.com/FJJJ8/article/details/84770470</link><guid>https://blog.youkuaiyun.com/FJJJ8/article/details/84770470</guid><author>FJJJ8</author><pubDate>Tue, 15 Mar 2016 10:39:31 +0800</pubDate><description><![CDATA[[code=&quot;java&quot;]Shell中while循环的done 后接一个重定向&lt; means that the While读文件的方法：

第一步： 将文件的内容通过管道（|）或重定向（]]></description><category></category></item><item><title><![CDATA[Oracle 相应时间计算]]></title><link>https://blog.youkuaiyun.com/FJJJ8/article/details/84767164</link><guid>https://blog.youkuaiyun.com/FJJJ8/article/details/84767164</guid><author>FJJJ8</author><pubDate>Fri, 26 Feb 2016 15:01:28 +0800</pubDate><description><![CDATA[[code=&quot;java&quot;]
1、获得时间差毫秒数： 
select ceil((To_date('2008-05-02 00:00:00' , 'yyyy-mm-dd hh24-mi-ss') - To_date('2008-04-30 23:59:59' , 'yyyy-mm-dd hh24-mi-ss')) * 24 * 60 * 60 * 1000) 相差豪秒数 FROM DUAL; ...]]></description><category></category></item><item><title><![CDATA[ORACLE 中DECODE和 CASE WHEN函数使用方式]]></title><link>https://blog.youkuaiyun.com/FJJJ8/article/details/84767161</link><guid>https://blog.youkuaiyun.com/FJJJ8/article/details/84767161</guid><author>FJJJ8</author><pubDate>Fri, 26 Feb 2016 14:56:52 +0800</pubDate><description><![CDATA[
decode是pl/sql语法,只能在oracle中使用,
case when是标准SQL的语法,哪儿都能用,也就是说移植性更强.

decode像是case when的精简版,
DECODE只能用做相等判断,但是可以配合sign函数进行大于，小于，等于的判断；CASE可用于=,&gt;=,...]]></description><category></category></item><item><title><![CDATA[Get details about long running operations]]></title><link>https://blog.youkuaiyun.com/FJJJ8/article/details/84745471</link><guid>https://blog.youkuaiyun.com/FJJJ8/article/details/84745471</guid><author>FJJJ8</author><pubDate>Mon, 19 Oct 2015 11:38:01 +0800</pubDate><description><![CDATA[[code=&quot;java&quot;]
http://stackoverflow.com/questions/23071771/how-to-create-a-slow-sql-query

http://www.oraclerecipes.com/monitoring/monitor-long-running-oracle-operations/

https://community.oracle...]]></description><category></category></item><item><title><![CDATA[Logger.getLogger()和LogFactory.getLog() and logging.Logger]]></title><link>https://blog.youkuaiyun.com/FJJJ8/article/details/84714500</link><guid>https://blog.youkuaiyun.com/FJJJ8/article/details/84714500</guid><author>FJJJ8</author><pubDate>Fri, 24 Apr 2015 11:32:21 +0800</pubDate><description><![CDATA[Logger来自log4j自己的包。如果用Logger.getLogger，需要一个log4j的jar包.

LogFactory来自common-logging包。如果用LogFactory.getLog，你可以用任何实现了通用日志接口的日志记录器替换log4j，而程序不受影响。apache的common-logging包是通用日志接口，通过这个中间层，你可以随便指定到底用哪个日志系统。增加...]]></description><category></category></item><item><title><![CDATA[ssh logon without password in Linux servers]]></title><link>https://blog.youkuaiyun.com/FJJJ8/article/details/84697578</link><guid>https://blog.youkuaiyun.com/FJJJ8/article/details/84697578</guid><author>FJJJ8</author><pubDate>Thu, 22 Jan 2015 11:00:29 +0800</pubDate><description><![CDATA[[code=&quot;java&quot;]ssh 无密码登录要使用公钥与私钥。linux下可以用用ssh-keygen生成公钥/私钥对。

有机器A(192.168.1.100)，B(192.168.1.151)。现想A通过ssh免密码登录到B。

1.在A机下生成公钥/私钥对,使用ssh-keygen生成一对密钥，存放在用户目录的~/.ssh下。

[chabc@A ~]$ ssh-keygen -...]]></description><category></category></item><item><title><![CDATA[Log4j knowledge note]]></title><link>https://blog.youkuaiyun.com/FJJJ8/article/details/84696370</link><guid>https://blog.youkuaiyun.com/FJJJ8/article/details/84696370</guid><author>FJJJ8</author><pubDate>Thu, 15 Jan 2015 14:58:47 +0800</pubDate><description><![CDATA[[code=&quot;java&quot;]
Log4j pattern format explain:
  %m 输出代码中指定的消息
  %p 输出优先级，即DEBUG，INFO，WARN，ERROR，FATAL 
  %r 输出自应用启动到输出该log信息耗费的毫秒数 
  %c 输出所属的类目，通常就是所在类的全名 
  %t 输出产生该日志事件的线程名 
  %n 输出一个回车换行符，Win...]]></description><category></category></item><item><title><![CDATA[BAT read file and write file]]></title><link>https://blog.youkuaiyun.com/FJJJ8/article/details/84696215</link><guid>https://blog.youkuaiyun.com/FJJJ8/article/details/84696215</guid><author>FJJJ8</author><pubDate>Wed, 14 Jan 2015 18:17:05 +0800</pubDate><description><![CDATA[[code=&quot;java&quot;]@echo off
setlocal enableextensions
setlocal enabledelayedexpansion
for /f &quot;tokens=1 delims= &quot; %%m in (sys.out) do (
	set num=%%m
	if /i !num! equ 5 (            
		echo 1 &gt;nsys.out...]]></description><category></category></item><item><title><![CDATA[Linux shell 查看系统开机时间]]></title><link>https://blog.youkuaiyun.com/FJJJ8/article/details/84684685</link><guid>https://blog.youkuaiyun.com/FJJJ8/article/details/84684685</guid><author>FJJJ8</author><pubDate>Mon, 10 Nov 2014 10:54:26 +0800</pubDate><description><![CDATA[[code=&quot;java&quot;]1： who 命令查看

      who -b 查看最后一次系统启动的时间。

      who -r 查看当前系统运行时间

[root@Server ~]# who -b

         system boot May 11 09:27

		 
2： last  reboot
[root@Server ~]# last reboot...]]></description><category></category></item><item><title><![CDATA[Insert characters Into a string in bash]]></title><link>https://blog.youkuaiyun.com/FJJJ8/article/details/84656690</link><guid>https://blog.youkuaiyun.com/FJJJ8/article/details/84656690</guid><author>FJJJ8</author><pubDate>Thu, 25 Sep 2014 11:23:30 +0800</pubDate><description><![CDATA[[code=&quot;java&quot;]
echo &quot;2013abcd07&quot; | sed 's/^\(.\{8\}\)/\1-/'

output:  2013abcd-07
it will insert character '-' after 8 characters
[/code]

[code=&quot;java&quot;]
time=125959  ## expected : 12:59:59
ech...]]></description><category></category></item><item><title><![CDATA[Oracle block and session]]></title><link>https://blog.youkuaiyun.com/FJJJ8/article/details/84654691</link><guid>https://blog.youkuaiyun.com/FJJJ8/article/details/84654691</guid><author>FJJJ8</author><pubDate>Fri, 19 Sep 2014 18:31:51 +0800</pubDate><description><![CDATA[For reference only.
[code=&quot;java&quot;]If you've ever gotten a phone call from an annoyed user whose transaction just won't go through, or from a developer who can't understand why her application sessions...]]></description><category></category></item><item><title><![CDATA[Oracle basic]]></title><link>https://blog.youkuaiyun.com/FJJJ8/article/details/84650732</link><guid>https://blog.youkuaiyun.com/FJJJ8/article/details/84650732</guid><author>FJJJ8</author><pubDate>Tue, 09 Sep 2014 15:46:11 +0800</pubDate><description><![CDATA[[code=&quot;java&quot;]一、运算符 
算术运算符：+ - * /   可以在select 语句中使用 
除法： 
select MOD(65,50) from dual     --取余 
select  trunc( 65/33) from dual  -- 取整 trunc (1.9) = 1 
select ceil(65/60) from dual          -- 取整...]]></description><category></category></item><item><title><![CDATA[linux shell获取当前文件的时间]]></title><link>https://blog.youkuaiyun.com/FJJJ8/article/details/84613742</link><guid>https://blog.youkuaiyun.com/FJJJ8/article/details/84613742</guid><author>FJJJ8</author><pubDate>Fri, 11 Jul 2014 14:14:41 +0800</pubDate><description><![CDATA[[code=&quot;java&quot;]stat -c %y  filename | awk '{print $1 $2 $3}' | cut -d &quot;.&quot; -f1 | sed -e 's/-//g' -e 's/://g'

stat filename | grep Modify | awk '{print $2 $3}' | cut -d &quot;.&quot; -f1 | sed -e 's/-//g' -e 's/...]]></description><category></category></item><item><title><![CDATA[linux tar命令]]></title><link>https://blog.youkuaiyun.com/FJJJ8/article/details/84606615</link><guid>https://blog.youkuaiyun.com/FJJJ8/article/details/84606615</guid><author>FJJJ8</author><pubDate>Mon, 16 Jun 2014 11:58:00 +0800</pubDate><description><![CDATA[[code=&quot;java&quot;]打包：把多个文件变成一个文件，常用tar。　
　
　　# tar -cf all.tar *.jpg
　　这条命令是将所有.jpg的文件打成一个名为all.tar的包。
   -c是表示产生新的包，
   -f指定包的文件名。

　　# tar -rf all.tar *.gif
　　这条命令是将所有.gif的文件增加到all.tar的包里面去。
   ...]]></description><category></category></item><item><title><![CDATA[Java程序打包成jar包]]></title><link>https://blog.youkuaiyun.com/FJJJ8/article/details/84606174</link><guid>https://blog.youkuaiyun.com/FJJJ8/article/details/84606174</guid><author>FJJJ8</author><pubDate>Fri, 13 Jun 2014 15:47:39 +0800</pubDate><description><![CDATA[[code=&quot;java&quot;]jar命令的用法：

下面是jar命令的帮助说明：

用法：jar {ctxui}[vfm0Me] [jar-file] [manifest-file] [entry-point] [-C dir] files ...

选项包括：
    -c  创建新的归档文件
    -t  列出归档目录
    -x  解压缩已归档的指定（或所有）文件
   ...]]></description><category></category></item><item><title><![CDATA[使用SAX或者DOM或者XmlPullParser解析XML文件]]></title><link>https://blog.youkuaiyun.com/FJJJ8/article/details/84569084</link><guid>https://blog.youkuaiyun.com/FJJJ8/article/details/84569084</guid><author>FJJJ8</author><pubDate>Thu, 24 Apr 2014 12:09:35 +0800</pubDate><description><![CDATA[使用SAX或者DOM或者pull解析XML文件
在Android平台上可以使用Simple API for XML(SAX) 、 Document Object Model(DOM)和Android附带的pull解析器解析XML文件。 下面是本例子要解析的XML文件：


文件名称：csdn.xml







李明

30





李向梅

25...]]></description><category></category></item><item><title><![CDATA[Log4j initialize]]></title><link>https://blog.youkuaiyun.com/FJJJ8/article/details/84531837</link><guid>https://blog.youkuaiyun.com/FJJJ8/article/details/84531837</guid><author>FJJJ8</author><pubDate>Thu, 27 Feb 2014 10:37:04 +0800</pubDate><description><![CDATA[[code=&quot;java&quot;]DOMConfigurator.config(filename);
适用于xml配置文件
如果是properties配置文件则用
PropertyConfigurator.configure(filename); [/code]
[code=&quot;java&quot;]import java.net.URL;  
  
import org.apache.log4j.xml...]]></description><category></category></item><item><title><![CDATA[在shell脚本中判断当天是否是当月最后一天]]></title><link>https://blog.youkuaiyun.com/FJJJ8/article/details/84511109</link><guid>https://blog.youkuaiyun.com/FJJJ8/article/details/84511109</guid><author>FJJJ8</author><pubDate>Tue, 10 Dec 2013 16:12:41 +0800</pubDate><description><![CDATA[[code=&quot;java&quot;]if [ $(date +%e) -eq $(cal|xargs|awk '{print $NF}') ]; then

echo  &quot;last day&quot;

else

echo &quot;not last day&quot;

fi

if [ &quot;$(date +%m)&quot; != &quot;$(date +%m -d &quot;+1day&quot;)&quot; ]; then

echo ]]></description><category></category></item><item><title><![CDATA[shell 中取当天的前一天的日期  ]]></title><link>https://blog.youkuaiyun.com/FJJJ8/article/details/84505647</link><guid>https://blog.youkuaiyun.com/FJJJ8/article/details/84505647</guid><author>FJJJ8</author><pubDate>Thu, 21 Nov 2013 14:21:46 +0800</pubDate><description><![CDATA[[code=&quot;java&quot;]
find -mtime -1
N * 24
+1 内表示 1 * 24 +24小时以外..
+0 才表示 0 * 24 +24小时以外
1 表示 1*24 + 24 到 24 之间..
0 表示 0*24 + 24 到 0 之间..
-1 表示 0*24 +24 内,甚至为未来时间

==================================...]]></description><category></category></item></channel></rss>