java perf tool

For a long time did not summarize some things, at the same time the collection part of the knowledge point of learning is relatively early, but never take time to study and study, today just have a moment to summarize the map commonly used traversal method:Package Runningwhile;import Java.util.hashmap;import Java.util.iterator;import Java.util.map;public class hashmaptest {public static void main (string[] args) {map　　The list also has its own iterator, with the following examples:Iterator it =

The oneinstack contains the following combinations:Lnmp(Linux + nginx+ mysql+ PHP)lamp(Linux + apache+ mysql+ PHP)Lnmpa(Linux + nginx+ mysql+ php+ Apache): Nginx handles Static, Apache (mod_php) handles dynamic PHPLNMT(Linux + nginx+ mysql+ tomcat): Nginx processing Static, Tomcat (JDK) processing Javalnmh(Linux + nginx+ mysql+ HHVM)Oneinstack Support System version (includes 32 and 64-bit systems): CentOS 5~7 (including Redhat) Debian 6~8 Ubuntu 12~16 Aliyun Linux 5.7, 15.1

2016 doomed to be a year of change, busy, net red, project financing failure, now a bit of time full post ~ ~Goal:Improve work efficiency and quality, can support the platform full-scale interface regression testing and iterative testing to meet the single interface test.People used:testing, developmentToolkit Catalog:Use:1. Fill in the test case2. Modify the execution configuration file3. Executing the JAR classTool Advanced:Rough version: The implementation of cryptographic decryption package,

) { Pattern p = pattern.compile ("^[0-9]{11}$"); Matcher m = p.matcher (value); Boolean IsOK = M.find (); return IsOK; }4. Create a random numberpublic static int Buildrandom (int length) {int num = 1;double random = Math.random (); if (Random 5. Get the model, browser type public static String Gettypeas (httpservletrequest request) { string typeas= request.getheader ("User-agent" ); if (Typeas.equals ("") | | Typeas==null) {typeas= "nothing";} return typeas; }5. Get the IP

obj) {byte[] ba =NULL; Bytearrayoutputstream BAOs=NULL; ObjectOutputStream Oos=NULL; Try{BAOs=NewBytearrayoutputstream (); Oos=NewObjectOutputStream (BAOs); Oos.writeobject (obj); BA=Baos.tobytearray (); } Catch(IOException e) {System.out.println ("Serialization failed!" "); } finally { Try { if(BAOs! =NULL) {baos.close (); } if(Oos! =NULL) {oos.close (); } } Catch(IOException e) {e.printstacktrace (); } } returnBA = =

;?Web:userid> web:getopenfunddataset> soap:body>soap:envelope>Operation response issoap:envelope xmlns:soap="Http://www.w3.org/2003/05/soap-envelope" xmlns: Web="http://WebXml.com.cn/" xmlns:xs="Http://www.w3.org/2001/XMLSchema"> soap:header/> soap:body> web:getopenfunddatasetresponse> web:getopenfunddatasetresult> xs:schema> Xs:schema> you could enter any elements at this point--> web:getopenfunddatasetre

but show out, certainly with Simpledateformart, mode for YYYY-MM-DD HH:mm:ss EE4. Set the valueCal.set (2013, 5, 4, 13, 44, 51);//Date and time (month 0 stands for January)Cal.set (Calendar.year, 2014);//yearCal.set (Calendar.month, 7);//month (month 0 stands for January)Cal.set (Calendar.date, 11);//dayCal.set (Calendar.hour_of_day, 15);//Cal.set (Calendar.minute, 33);//minCal.set (Calendar.second, 32);//sec5. Operation ValueCal.add (calendar.year, 1);//yearCal.add (Calendar.month, 1);//monthC

") Public voidsessiondestroyed (Httpsessionevent event) {HttpSession session=event.getsession (); ServletContext Application=Session.getservletcontext (); HashSet Sessions= (HashSet) application.getattribute ("Sessions"); //the destroyed session is removed from the hashset set.Sessions.remove (session); } /*** Access to the number of online users and number of users logged in *@paramrequest current Requested Object *@paramflag=1 Current Online users flag=2 number of currently logged on u

from a bit, but printed out 2. That is, thread 2 before and after the operation of the data, the data has been modified by thread 3, once again to prove that Semaphere does not realize the synchronization of the common data, in the operation of public data, we need to implement ourselves.Semaphere If the semaphore is set to 1, then it means that only one thread at a time to operate the task, then there is no thread safety problem, so if the set signal volume of 1, you can remove the synchronize

over, take the heroin and run!" "); } } }); } }From the code, I seem to see two people trading drugs in the scene ... Take a look at how the trading results are: Thread pool-1-thread-1 is taking heroin out of the drug.Thread pool-1-thread-2 is taking 3 million out.Thread pool-1-thread-2 got heroin in 3 million.Thread Pool-1-thread-1 3 million in heroin.Finish the deal, run with heroin!The deal's over, take the money and run! Run fast, from the run

1. Get timestamp of N days ago1 Calendar cl = calendar.getinstance (); 2 Cl.add (Calendar.day_of_year,-7); 3 Date date = cl.gettime (); 4 long time = date.gettime (); 5 New Timestamp (time);2. Program start current time and task execution time1 /*2 Delegate Time3 */4String time= "20:00";5 6 /*7 SimpleDateFormat can parse string to Date, format Date to string8 */9DateFormat DateFormat =NewSimpleDateFormat ("Yy-mm-dd hh:mm");TenDateFormat DayFormat =NewSimpleDateFormat ("Yy-mm-dd"); One ADate cur

=NewProperties (); $InputStream is =NULL; $ Try { -is = Propertiesutil.class. getClassLoader (). getResourceAsStream ( - properiesname); the P.load (IS); -}Catch(IOException e) {Wuyi //TODO auto-generated Catch block the e.printstacktrace (); -}finally { Wu Try { - is.close (); About}Catch(IOException e) { $ //TODO auto-generated Catch block - e.printstacktrace (); - } - } A returnp; + } the - Public voidWrite

Java report tool FineReport Common Errors and solutions (1), javafinereportCommon Errors encountered during use of FineReport and solutions (1) I hope that you can solve your own problems and solve them. Mark them to benefit yourself. If any problem occurs, first search for the document, and then check whether du Niang is there, and then check whether there is a forum. If an error is reported, the log must

buffer blockingqueue, there is a link between the intermediate dealers (buffer), if there is a dealer, the producers directly wholesale the product to the dealer, regardless of the dealer will eventually sell these products to those consumers, because the dealer can stock a part of the goods, Therefore, compared to the direct trading model, the overall use of intermediate dealer mode will be higher throughput (can be sold in bulk); On the other hand, because of the introduction of the dealer, t

Gson-2.7.jar Package Required PackageCn.java.gson;Importcom.google.gson.JsonElement;ImportCom.google.gson.JsonObject;ImportCom.google.gson.JsonParser; Public classTest { Public Static voidMain (string[] args) {dataType (); Dataobj (); DataArray (); } Public Static voidDataType () {String jsonstr= "{\" code\ ": 200,\" message\ ": \" message\ ", \" Data\ ": []}"; Jsonobject Jsonobject= (Jsonobject)NewJsonparser (). Parse (JSONSTR); System.out.println (Jsonobject.get ("Code")); System

"); if(File.endswith ("Learnio.java") ) {System. out. println ("****** Locate the target file learnio.java******"); returnFilevisitresult.terminate;//Stop when you find it. } returnFilevisitresult.continue;//I can't find it. } }); ; }Monitor file changes with WatchservicePrivate Static voidWatchservicetest () throws IOException, interruptedexception {//TODO auto-generated Method StubWatchservice Watchservice =Filesystems.getdefault (). Newwatc

Tag: The source null pointer will add technology sharing using the Main method class to load. comThe trouble I have: Start directly on the video to do, directly is also introduced to his jar above, but I only introduced one, that is, the above Junit-4.4.jar, then will be error, will appear, null pointer errors,I followed the online tutorialWhat should be said here is to try to use the JUnit jar package from Eclipse, the result is error in workplace, and then I find that the source is empty when

= Md.digest (); for (byte b:digest) {//to convert each byte to 16 binary int d = b 0xff;//0x000000ffstring He xstring = integer.tohexstring (d); if (hexstring.length () = = 1) {//bytes high 4 bits is 0hexString = "0" + hexstring;} hexstring = Hexstring.touppercase (); Mess.append (hexstring);//the 2-bit hexadecimal number corresponding to each byte as string concatenation}} catch (NosuchalgoritHmexception e) {//Todo auto-generated catch Blocke.printstacktrace ();} catch (FileNotFoundException

Package Com.sh.xrsite.common.utils;import Java.io.file;import Java.util.hashmap;import java.util.Locale;import Java.util.map;import Java.util.regex.matcher;import Java.util.regex.pattern;import Org.apache.commons.mail.htmlemail;import Org.springframework.ui.freemarker.freemarkertemplateutils;import Freemarker.template.configuration;import freemarker.template.template;/** * Send email */public class SendMailUtil {//PRI vate static final String smtphost = "192.168.1.70"; Private static final

Java report tool finereport common functions usage Summary (Array Function), javafinereport ADD2ARRAY ADDARRAY (array, insertArray, start): inserts all elements in insertArray at the start position of the array and returns the array. Example: ADDARRAY ([3, 4, 1, 5, 7], [23, 43, 22], 3) Returns [3, 4, 23, 43, 22, 1, 5, 7]. ADDARRAY ([3, 4, 1, 5, 7], "test", 3) Returns [3, 4, "test", 1, 5, 7]. Note: If start