isr 1921

public class Cmdexec{private Boolean programflag = false;private static final Logger Logger = Logger.getlogger (cmdexec.cla SS); private static CmdExec CmdExec =null; public static CmdExec Getcmdexec () {if (cmdexec==null) {CmdExec = new CmdExec (); } return cmdExec; }/** * @Title: CmdExec * @Description: Execute cmd command * @param @param cmdstr * @return void * @throw S */public void cmdExec (String cmd,string programname) {Desktop desktop = desktop.getdesktop (); Runtim

.propertiesEdit copy: Config/server-1.properties: broker.id=1 listeners=plaintext://:9093 log.dir=/tmp/kafka-logs-1 Config/server-2.properties: broker.id=2 listeners=plaintext://:9094 log.dir=/tmp/kafka-logs-2The Broker.id attribute must be unique for each node. Using a different log directory is for each node to store its own log files and not overwrite each other. Start these two nodes: > bin/kafka-server-start.sh config/server-1.properties ... > bin/kafka-server-

clearly, which is no longer described here. In addition, the operation of HDFS files requires the use of Core-site.xml and Hdfs-site.xml files in the Hadoop directory. 　 Code Snippets Configuration: Configuration conf = new configuration (); FileSystem HDFs = Filesystem.get (Uri.create ("Hdfs://nameservice/path"), conf, "username"); HDFs file read and write operations: public void Writercontenttohdfs (string hdfsfile, string content) {OutputStream OS = null; OutputStreamWriter OSW = null;

Cmsis-rtos2 Universal RTOs Interface Cmsis-rtos2 is a generic API that is independent of the underlying RTOS kernel. The programmer calls the Cmsis-rtos2 API function in user code to ensure maximum portability from one RTOs to another. Use the middleware of the Cmsis-rtos2 API to avoid unnecessary porting efforts. The typical CMSIS-RTOS2 API is implemented with an existing real-time kernel interface. The Cmsis-rtos2 API provides the following properties and features:Thread management allows

/*** Data requests using the Get method of HTTP*/ protected voidHttpGet () {/*** Make asynchronous requests*/ NewAsynctask() {@OverrideprotectedVoid doinbackground (String ... params) {System.err.println ("HttpGet Start"); //data processing is only possible in this method and cannot interact with UI Try{URL URL=NewURL (params[0]); URLConnection Connection=url.openconnection (); InputStream is=Connection.getinputstream (); //data stream conversion using UTF-8, from byte f

/** * Json:javascript Object Notation (JavaScript object Notation). @author wangzhu * */1. Reading JSON objects from a file/*** Read JSON object*/ Private voidReadjsonobject () {String json=ReadFile (); Try{jsonobject root=NewJsonobject (JSON); System.err.println ("Cat=" + root.getstring ("Cat")); Jsonarray Array= Root.getjsonarray ("Language"); for(inti = 0; I ) {System.err.println ("------------"); Jsonobject Object=Array.getjsonobject (i); System.err.println ("Id=" + object.getint ("id"

Search on the web, and find it inappropriate.Final Rewrite code:FileInputStream FIS =NULL; InputStreamReader ISR=NULL; BufferedReader BR=NULL;Try{FIS=Newfileinputstream (file); ISR=NewInputStreamReader (FIS, "GBK"); BR=NewBufferedReader (ISR); String line1=NULL; while((line1 = Br.readline ())! =NULL) {System.out.println (line1); } br.close (); Isr.clo

;import Java.io.ioexception;import Java.io.inputstream;import Java.io.inputstreamreader;import java.net.HttpURLConnection ; Import Java.net.url;import Java.net.urlconnection;import java.util.arraylist;import Java.util.list;import Org.jsoup.connection;import Org.jsoup.jsoup;import Org.jsoup.nodes.document;import Org.jsoup.nodes.Element;import Org.jsoup.select.elements;public class Myspider {/** * networking, get web page source code, parse source code */public static string gethtmlfromurl (string

the encoding method, the underlying operating system uses the default encoding method, such as GBK. When using FileReader to read files. FileReader fr = new FileReader ("ming.txt "); Int ch = 0; While (ch = fr. read ())! =-1) { System. out. print (char) ch ); } The read () method returns the read to get the next character. Of course, you can also use read (char [] ch, int off, int length), which is similar to processing binary files. If you use InputStreamReader to read files While (ch =

(char [] ch, int off, int length), which is similar to processing binary files. If you use InputStreamReader to read filesWhile (ch = isr. read ())! =-1){System. out. print (char) ch );}This is no different from FileReader. In fact, the methods in FileReader are inherited from InputStreamReader. The read () method is time-consuming. To improve the efficiency, we can use BufferedReader to package the Reader. In this way, the read speed can be improved

=" + url. getPort ());System. out. println ("path =" + url. getPath ());System. out. println ("query =" + url. getQuery ());System. out. println ("filename =" + url. getFile ());System. out. println ("ref =" + url. getRef ());} Catch (MalformedURLException e ){// TODO Auto-generated catch blockE. printStackTrace ();}} } Download webpage information through URL [Java]Package net. csdn. web;Import java. io. BufferedReader;Import java. io. FileOutputStream;Import java. io. IOException;Import java