elasticsearch java client example

Description: This is "Dahua design pattern" a Book of Learning abstracts and online related information Digest, the original book code examples in C # write, the following Java rewrite. 1. Agent mode: Provides a proxy for other objects to control access to this object. In some cases, an object may not fit or directly refer to another object, and the proxy object can act as a mediator between the client

1. Simple Factory Model IntroductionThe Simple factory pattern (simply Factory) is also called the "static factory method pattern." It belongs to the "Create pattern" (the schema that creates the object) and is a special implementation of the "factory method" pattern.Typically, we use a simple factory pattern to create a class. For example, getting a thread pool object is done through a simple factory pattern. Its structure diagram looks like this:

intData_len = 4096; - Private Static FinalString dest_ip = "127.0.0.1"; - //byte array that accepts network data the byte[] Inbuff =New byte[Data_len]; - //Receive Data - PrivateDatagrampacket Inpacket =NewDatagrampacket (Inbuff, inbuff.length); - //Send Data + PrivateDatagrampacket Outpacket; - + Public voidInit ()throwsIOException { A Try { at //create a socket using a random port -Datagramsocket socket =NewDatagramsocket (); -Outpacke

Simple application of the Java NIO socket to the AS3 socket connection application instance of the Java NiO socket to the AS3 socket connection. RAR (9.61 KB, download count: 1691) This from the basic to get up too complex, I got a Mina with flash communication, communication Data mode is datalength+data (data length + data content), for socket byte throttle communication, I used this way, convenient sticky

;ImportKafka.javaapi.consumer.ConsumerConnector;ImportKafka.serializer.StringDecoder;Importkafka.utils.VerifiableProperties; Public classKafkaconsumer {Private FinalConsumerconnector Consumer; PublicKafkaconsumer () {Properties props=NewProperties (); //Zookeeper ConfigurationProps.put ("Zookeeper.connect", "192.168.91.231:2181"); //Group represents a consumer groupProps.put ("Group.id", "Jd-group"); //ZK Connection timed outProps.put ("zookeeper.session.timeout.ms", "4000"); Props.put ("Zookee

View code Package RegEx;Import java. Io. ioexception;Import java. util. RegEx. matcher;Import java. util. RegEx. pattern;/*** Note: matcher is the main operation class of the regular expression. It contains the most important method for extraction and replacement. pattern is not the main class.* Replaceall is used to replace all. replacefirst or replaceend can b

Package Kenny. Remote;IMP ORT Lotus. Domino. database;IMP ORT Lotus. Domino. Document;IMP ORT Lotus. Domino. notesexception;IMP ORT Lotus. Domino. notesfactory;IMP ORT Lotus. Domino. Session;IMP ORT Lotus. Domino. view;/*** @ Author Kenny* Example: Java Program Remote access to the Domino server*/Public class connectdomino {// The domain name of the Domino server to be accessed. You can also use an IP

Java remote Debugging is the principle of two VM communication between the debug protocol, and then to achieve the purpose of remote debugging. You can communicate between the two by using a socket.First, the virtual machine of the debug program starts debug mode on startup and starts the debug listener. JDWP is the abbreviation for the Java Debug Wire protocol. When you start a program, the following pa

() {DB = dataoperatefactory. getinstance (); // get a single instance, people P = dB. getpeople ("123"); // get a record DB. insertpeople (p); // insert back} we found that sampleclass does not have any shadows such as canceldataoperate and mysqldataoperate, which is the power of the interface. The client does not have to write different code for canceldataoperate. It only cares about dataoperate. dataoperatefactory is responsible for the specific lo

This way, if you do not log in and access commonuser.jsp directly, you will jump to the login interface. 3, the use of special documents to verify Because many pages have to write validated code, you can put this code in a file to share, need to use the call to share files. The following still takes commonuser.jsp as an example of how to implement the sharing of validation code. Use specialized files to store shared code: Check.jsp Code:

Service side:ServerSocket service = new ServerSocket (7777); Socket socket = service.accept (); InputStream input = Socket.getinputstream (); OutputStream out = Socket.getoutputstream ( ); Bufferedinputstream bufinput = new Bufferedinputstream (input); Bufferedoutputstream bufout = new Bufferedoutputstream (out); byte [] buf = new Byte[1024];int len = 0; StringBuffer sb = new StringBuffer (); String message = new String (Buf,0,bufinput.read (BUF)); SYSTEM.OUT.PRINTLN (message);

Example of downloading attachments using java and javascript In web development, you often need to develop the "Download" module. The following is a simple example. On the server side, use java for development: 01 @ RequestMapping (value = "download.html", method = RequestMethod. GET)

RMI is an RPC framework in the Java language, this article gives the following basic examples:1. Implement the interface: Public Interface extends Remote { publicint Add (intintthrows java.rmi.RemoteException;}2, the server to implement the interface: Public classCalcimplextendsUnicastRemoteObjectImplementsIcalc {protectedCalcimpl ()throwsRemoteException {Super(); } @Override Public intAddintPARAM1,intparam2) { returnParam1 +param2; } P

Use Java IO, Java NIO, Netty to implement a simple echoserver (that is, returning the client's input information as is).Java IOint port = 9000; ServerSocket ss = new ServerSocket (port), while (true) {final socket socket = ss.accept (), New Thread (new Runnable () {public void Run () {while (true) {try {bufferedinputstream in = new Bufferedinputstream (Socket.get

protected void doget (HttpServletRequest request, HttpServletResponse response) throws Servletexception, IOException {//TODO auto-generated Method Stub //Set server side to output UTF-8 encoding response.setcharacterencoding ("UTF-8 "); //Set the browser to receive UTF-8 encoding to solve the Chinese garbled problem Response.setcontenttype ("Text/html;charset=utf-8"); PrintWriter out = Response.getwriter (); //Get the array of cookies passed by the browser when accessing the server cookie[]

Responsibility chain Pattern: Multiple objects are linked by the reference of their objects to the next, and the request is passed on this chain until one of the receiving objects on the chain processes the request. Because the requesting client does not know who is ultimately on the chain to process the request, the system can dynamically rearrange and assign responsibilities without affecting the client,

the basic structure of the state pattern:in the main () function, the first implementation is used, and then the second implementation is transferred. When you implement state mode yourself, you encounter a lot of detail, and you have to choose the right implementation method based on your needs , such as whether it is exposed to the calling client and how the state changes. In some cases (such as Swing's LayoutManager), the

clientDos.writeutf ("Accept connection request, connection successful!")); //when you do not need to continue using this connection, close the connectionSocket.close ();　　 Ss.close (); } Catch(IOException e) {e.printstacktrace (); }}}2. Client code PackageCom.lanber.socket;import Java.io.DataInputStream;ImportJava.io.dataoutputstream;import java.io.IOException;ImportJava.io.OutputStream;ImportJava.net.Socket;Importjava.net.UnknownHostException; Pu

Colleagues use Java to do a crawl of any page title, because the HTML of any page in the head of the meta-specified charset a variety of, such as commonly used utf-8,gbk,gb2312.Write their own code processing, in a short time, found a variety of situations too difficult to think about, always crawl garbled. Challenges: There may also be meta or meta, even if there is meta may also be uppercase or lowercase, even if the case is done with white space ch

serverBufferedReader br =NewBufferedReader (NewInputStreamReader (Socket.getinputstream ())); String msg=NULL; while(msg = Br.readline ())! =NULL) System. out. println (msg); } Catch(IOException e) {e.printstacktrace (); } } }; }}Package Org.merit.test.socket;import java.io.ioexception;import java.net.serversocket;import java.net.Socket; Import Java.util.concurrent.executorservice;import java.util.concurrent.Executors; Public classMultithreadserver {Private intPort =8821;