JDK6 Http server的设置
地球人都知道sun在jdk中六种自带了一个轻量级http server.
用它可以很容易实现一些轻量级的http服务，用来做测试和辅助工具很方便。
不过关于其的文档很少，参数调节等都没有文档说明，一切只能去看其源代码。
今天遇到一个问题：当客户端超过一定时间未发送数据，则连接被服务端自动关闭。
必须调整连接时间才行。
经过查找，JDK中，有个叫做ServerConfig的类，这里面设置了这个http server的一些必要参数,比如读取等待时间，写入等待时间等。
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class ServerConfig { static int clockTick; static int defaultClockTick = 10000 ; // 10 sec. /* These values must be a reasonable multiple of clockTick */ static long defaultReadTimeout = 20 ; // 20 sec. static long defaultWriteTimeout = 60 ; // 60 sec. static long defaultIdleInterval = 300 ; // 5 min static long defaultSelCacheTimeout = 120 ; // seconds static int defaultMaxIdleConnections = 200 ; static long defaultDrainAmount = 64 * 1024; static long readTimeout; static long writeTimeout; static long idleInterval; static long selCacheTimeout; static long drainAmount;// max # of bytes to drain from an inputstream static int maxIdleConnections; static boolean debug = false; static {idleInterval = ((Long)java.security.AccessController.doPrivileged(new sun.security.action.GetLongAction("sun.net.httpserver.idleInterval", defaultIdleInterval))).longValue() * 1000;clockTick = ((Integer)java.security.AccessController.doPrivileged(new sun.security.action.GetIntegerAction("sun.net.httpserver.clockTick", defaultClockTick))).intValue();maxIdleConnections = ((Integer)java.security.AccessController.doPrivileged(new sun.security.action.GetIntegerAction("sun.net.httpserver.maxIdleConnections", defaultMaxIdleConnections))).intValue();readTimeout = ((Long)java.security.AccessController.doPrivileged(new sun.security.action.GetLongAction("sun.net.httpserver.readTimeout", defaultReadTimeout))).longValue()* 1000;selCacheTimeout = ((Long)java.security.AccessController.doPrivileged(new sun.security.action.GetLongAction("sun.net.httpserver.selCacheTimeout", defaultSelCacheTimeout))).longValue()* 1000;writeTimeout = ((Long)java.security.AccessController.doPrivileged(new sun.security.action.GetLongAction("sun.net.httpserver.writeTimeout", defaultWriteTimeout))).longValue()* 1000;drainAmount = ((Long)java.security.AccessController.doPrivileged(new sun.security.action.GetLongAction("sun.net.httpserver.drainAmount", defaultDrainAmount))).longValue();debug = ((Boolean)java.security.AccessController.doPrivileged(new sun.security.action.GetBooleanAction("sun.net.httpserver.debug"))).booleanValue(); } static long getReadTimeout () {return readTimeout; } static long getSelCacheTimeout () {return selCacheTimeout; } static boolean debugEnabled () {return debug; } static long getIdleInterval () {return idleInterval; } static int getClockTick () {return clockTick; } static int getMaxIdleConnections () {return maxIdleConnections; } static long getWriteTimeout () {return writeTimeout; } static long getDrainAmount () {return drainAmount; }}?从代码可知，修改这些细节参数，只要添加必要的java启动变量即可。