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top cpu分析按shift+H 可按线程查看查出us高的线程id ，用kill -3 javapid 或jstack方式 dump出线程信息，将线程id转为十六进制jstack pid|grep nid=16进制pidjstack -l javapid dump出java线程信息iostat 或iostat -x xvda 当iowait过高时，就...

1[code="java"]package com.fuyou.concurrency;import java.util.Collections;import java.util.HashMap;import java.util.Map;import net.jcip.annotations.GuardedBy;import net.jcip.annotatio...

java 双重检查模式的演变[url]http://www.ibm.com/developerworks/cn/java/j-dcl.html[/url]

stack1[code="java"]// Generic stack using E[] - Pages 125-127import java.util.Arrays;public class Stack < E >{ private E[] elements; private int size = 0; private static final ...

[code="java"] var text = encodeURI(encodeURI('中国')); alert(decodeURI(decodeURI(text))); //js 解码 alert(text); var imgLog = new Image(); imgLog.src='comment.jsp...

[code="java"]package com.fuyou.effect;// Enum type with data and behavior - Pages 149-150public enum Planet { MERCURY(3.302e+23, 2.439e6), VENUS(4.869e+24, 6.052e6), EARTH(5.975e+24,6.37...

[code="java"]package com.fuyou.demo;import java.sql.Connection;import java.sql.PreparedStatement;import java.sql.SQLException;import java.sql.Statement;import com.fuyou.jdbc.JRunstats;im...

[code="java"]log4j.rootLogger=Error,rootLoglog4j.logger.com.fuyou.log.test2=debug,test2loglog4j.logger.com.fuyou.log.test=debug,testloglog4j.appender.A1=org.apache.log4j.ConsoleAppender ...

[code="java"]## yubaofu #### APP_HOME="..."FILE_NAME="..."MAIN_CLASS_NAME="..."PORT=8888CLASSPATH=$APP_HOME/$FILE_NAMEfor i in $APP_HOME/lib/*.jardo CLASSPATH="$i:$CLASSPATH"d...

[url]http://www.slideshare.net/tednaleid/redis-and-groovy-and-grails-gr8conf-2011[/url][url]http://blog.mjrusso.com/2010/10/17/redis-from-the-ground-up.html#heading_toc_j_1[/url][url]http://ti...

文档　　　　http://kenai.com/projects/btrace/pages/UserGuide#btrace_anno下载btrace http://kenai.com/projects/btrace/downloads/directory/releases/release-1.2.1btrace-bin.tar.gz 文件tar xvf btrace-b...

我按照官网的说明 [url]http://download.oracle.com/javase/6/docs/technotes/tools/share/jstatd.html[/url]配置，但最后没有成功相关信息在附件里配置信息 配置图:[url]http://www.yupoo.com/photos/fuyou001/82192935/[/url]本地连拉...

[i]URL编码[/i]: [color=olive]a-z A-Z 0-9 - _ . * 等字符保持不变[/color] 用+替换所用的空格，用%替换所有非数字和数字的字符，后面再跟一个两位数的十六进制这种编码使得在任何程序中都不会混入空格，并且也不需要对其他特殊字符进行转换--这叫URL编码[i]Base64编码[/i]: 用于编码将字节流编码成可打印的ASCII字符...

NioServerSocketPipelineSinkNioWorker SocketReceiveBufferPoolDefaultChannelPipeline

在看代码时，看到有这样的用法：插入一条记录，然后用 [code="java"]SELECT LAST_INSERT_ID() [/code] 取这条记录的id(此id是AUTO_INCREMENT)当时第一反应会不会有线程安全的问题查看MySQL文档 [url]http://dev.mysql.com/doc/refman/5.0/en/information-function...