{"rsdb":{"rid":"87971","subhead":"","postdate":"0","aid":"65326","fid":"76","uid":"1","topic":"1","content":"
\n Java\u7f51\u7edc\n \u7f16\u7a0b<\/a> \n
\n InetAddress\u7c7b\n <\/div> \n
\n InetAddress\u7c7b\u662f\u4e2a\u8868\u793aip\u5730\u5740\u7684\u7c7b\u3002\n <\/div> \n
\n InetAddress\u6ca1\u6709\u6784\u9020\u51fd\u6570\uff0c\u662f\u7528\u5b83\u7684static\u65b9\u6cd5\u7c7b\u8fd4\u56deInetAddress\u5bf9\u8c61\u7684\u3002\n <\/div> \n
\n getByAddress\n <\/div> \n
\n public static InetAddress getByAddress(byte[] addr) throws UnknownHostException\n <\/div> \n
\n public static InetAddress getByAddress(String host, byte[] addr) throws UnknownHostException\n <\/div> \n
\n \u65e0\u8bba\u53c2\u6570addr\u6240\u8868\u793a\u7684ip\u662f\u5426\u5b58\u5728\uff0c\u90fd\u4f1a\u521b\u5efa\u4e00\u4e2a\u8fd9\u4e2aip\u5730\u5740\u7684InetAddress\u5bf9\u8c61\u3002\u7b2c\u4e8c\u4e2a\u65b9\u6cd5\u4e2d\u7684host\u4e3b\u673a\u540d\u4e5f\u4e0d\u4e00\u5b9a\u8981\u662faddr\u6240\u8868\u8fbe\u7684ip\u4e3b\u673a\u7684\u771f\u6b63\u540d\u5b57\u3002\u8fd9\u4e2ahost\u53ea\u662f\u7528\u6765\u8868\u793a\u522b\u540d\u3002\n <\/div> \n
\n getByName\n <\/div> \n
\n public static InetAddress getByName(String host) throws UnknownHostException\n <\/div> \n
\n public static InetAddress[] getAllByName(String host) throws UnknownHostException\n <\/div> \n
\n isReachable\u65b9\u6cd5\n <\/div> \n
\n public boolean isReachable(int timeout) throws IOException\n <\/div> \n
\n public boolean isReachable(NetworkInterface netif, int ttl, int timeout) throws IOException\n <\/div> \n
\n \u7b2c\u4e00\u4e2a\u91cd\u8f7d\u5f62\u5f0f\u6709\u4e00\u4e2atimeout\u53c2\u6570\uff0c\u53ef\u4ee5\u901a\u8fc7\u8fd9\u4e2a\u53c2\u6570\u8bbe\u7f6e\u8fde\u63a5\u8d85\u65f6\uff08\u5355\u4f4d\uff1a\u6beb\u79d2\uff09\u3002\u7b2c\u4e8c\u4e2a\u91cd\u8f7d\u5f62\u5f0f\u591a\u4e86\u4e24\u4e2a\u53c2\u6570\uff1anetif\u548cttl\u3002\u901a\u8fc7netif\u53c2\u6570\u53ef\u4ee5\u4f7f\u7528\u4e00\u4e2aNetworkInterface\u5bf9\u8c61\u6765\u786e\u5b9a\u5ba2\u6237\u7aef\u4f7f\u7528\u54ea\u4e2a\u7f51\u7edc\u63a5\u53e3\u6765\u6d4b\u8bd5\u4e3b\u673a\u7684\u8fde\u901a\u6027\u3002ttl\u662f\u6307\u6d4b\u8bd5\u8fde\u901a\u6027\u8fc7\u7a0b\u4e2d\u7684\u6700\u5927\u8fde\u63a5\u8dc3\u70b9\u6570\uff08\u4ece\u5ba2\u6237\u673a\u5230\u8fbe\u8fdc\u7a0b\u4e3b\u673a\u6240\u7ecf\u8fc7\u7684\u6700\u5927\u8def\u7531\u6570\u5c31\u662f\u6700\u5927\u8fde\u63a5\u8dc3\u70b9\u6570\u3002\n <\/div> \n
\n isReachable\u65b9\u6cd5\u662f\u901a\u8fc7\u8fde\u63a5\u4e3b\u673a\u7684echo\u7aef\u53e3\u6765\u786e\u5b9a\u5ba2\u6237\u7aef\u548c\u670d\u52a1\u7aef\u662f\u5426\u53ef\u8fde\u901a\u3002\u4f46\u5728Internet\u4e0a\u4f7f\u7528\u8fd9\u4e2a\u65b9\u6cd5\u53ef\u80fd\u4f1a\u56e0\u4e3a\u653e\u706b\u5899\u7b49\u56e0\u7d20\u800c\u65e0\u6cd5\u8fde\u901a\u8fdc\u7a0b\u4e3b\u673a\uff08\u5b9e\u9645\u4e0a\uff0c\u8fdc\u7a0b\u4e3b\u673a\u662f\u53ef\u4ee5\u8fde\u901a\u7684\uff09\uff0c\u56e0\u6b64\uff0cisReachable\u5728Internet\u4e0a\u5e76\u4e0d\u53ef\u9760\u3002\u4f46\u6211\u4eec\u53ef\u4ee5\u5c06isReachable\u65b9\u6cd5\u5e94\u7528\u3002\n <\/div> \n
\n \u62d2\u7edd\u901a\u8fc7ip\u5730\u5740\u8bbf\u95ee\u7f51\u7ad9\uff08HTTP\u72b6\u6001\u53f7:403\uff09\n <\/div> \n
\n \u6709\u4e9b\u7f51\u7ad9\u660e\u660e\u8f93\u5165\u7684ip\u662f\u5bf9\u7684\uff0c\u4f46\u662f\u5374\u8bbf\u95ee\u4e0d\u4e86\u7f51\u7ad9\uff0c\u8fd9\u662f\u56e0\u4e3a\u670d\u52a1\u5668\u901a\u8fc7\u68c0\u9a8cHTTP\u534f\u8bae\u7684\u8bf7\u6c42\u5934\u4e2d\u7684Host\u5b57\u6bb5\u9632\u6b62\u7528\u6237\u76f4\u63a5\u901a\u8fc7ip\u5730\u5740\u6765\u8bbf\u95ee\u7f51\u7ad9\u3002\n <\/div> \n
\n DNS\u7f13\u5b58\n <\/div> \n
\n \/\/\u628aDNS\u7f13\u5b58\u8d85\u65f6\u8bbe\u7f6e\u4e3aargs[1]\u79d2\n <\/div> \n
\n java<\/a>.security.Security.setProperty(\"networkaddress.cache.ttl\",args[1]);\n <\/div> \n
\n Security\u7c7bwww.2cto.com\n <\/div> \n
\n Thisclass centralizes all security properties and common securitymethods. One of its primary uses is to manage providers.\n <\/div> \n
\n networkaddress.cache.ttl\u5c5e\u6027\n <\/div> \n
\n \u5728jdk\u7684\/usr\/lib\/jvm\/jdk7\/jre\/lib\/security\/java<\/a>.security\u6587\u4ef6\u4e2d\n <\/div> \n
\n \u53c2\u6570args[1]\uff1a\u8868\u793a\u7f13\u5b58\u65f6\u95f4\uff0c-1\u8868\u793a\u6c38\u4e45\u7f13\u5b58\u3002\n <\/div> \n
\n NetworkInterface\u7c7b\uff08\u7f51\u7edc\u63a5\u53e3\u4fe1\u606f\uff09\n <\/div> \n
\n \u8fd9\u4e2a\u7c7b\u4e5f\u6ca1\u6709\u6784\u9020\u51fd\u6570\u3002\n <\/div> \n
\n public static NetworkInterface getByInetAddress(InetAddress addr) throws SocketException\n <\/div> \n
\n public static NetworkInterface getByName(String name) throws SocketException\n <\/div> \n
\n Socket\u7f16\u7a0b\n <\/div> \n
\n \u5728\u5ba2\u6237\u7aef\u53ef\u4ee5\u901a\u8fc7\u4e24\u79cd\u65b9\u5f0f\u6765\u8fde\u63a5\u670d\u52a1\u7aef\uff1aip\u548c \u57df\u540d\n <\/div> \n
\n \u5728java\u4e2d\uff0c\u5df2\u7ecf\u5c06\u57df\u540d\u89e3\u6790\u529f\u80fd\u5305\u542b\u5728Socket\u7c7b\u4e2d\uff0c\u6240\u4ee5\u6211\u4eec\u53ef\u4ee5\u60f3\u4f7f\u7528ip\u4e00\u6837\u4f7f\u7528\u57df\u540d\u3002\n <\/div> \n
\n \n <\/div> \n<\/dd>","orderid":"0","title":"\u9ed1\u9a6c\u7a0b\u5e8f\u5458 java \u7f51\u7edc\u7f16\u7a0b","smalltitle":"","mid":"0","fname":"JAVA","special_id":"0","bak_id":"0","info":"0","hits":"538","pages":"1","comments":"0","posttime":"2014-11-24 12:04:54","list":"1416801894","username":"admin","author":"","copyfrom":"","copyfromurl":"","titlecolor":"","fonttype":"0","titleicon":"0","picurl":"https:\/\/www.cppentry.com\/upload_files\/","ispic":"0","yz":"1","yzer":"","yztime":"0","levels":"0","levelstime":"0","keywords":"\u9ed1\u9a6c<\/A> \u7a0b\u5e8f\u5458<\/A> java<\/A> \u7f51\u7edc\u7f16\u7a0b<\/A>","jumpurl":"","iframeurl":"","style":"","template":"a:3:{s:4:\"head\";s:0:\"\";s:4:\"foot\";s:0:\"\";s:8:\"bencandy\";s:0:\"\";}","target":"0","ip":"114.215.104.12","lastfid":"0","money":"0","buyuser":"","passwd":"","allowdown":"","allowview":"","editer":"","edittime":"0","begintime":"0","endtime":"0","description":"\u9ed1\u9a6c\u7a0b\u5e8f\u5458 java \u7f51\u7edc\u7f16\u7a0b","lastview":"1711687566","digg_num":"1898","digg_time":"0","forbidcomment":"0","ifvote":"0","heart":"","htmlname":"","city_id":"0"},"page":"1"}