kafka java example

Java uses Metro to generate WebService, publish WebService in Tomcat, and how to use WebService A simple example: Download and install Metro.(This example uses 1.5)Http://java.net/projects/metroAfter downloading the package for the metro-1.5.jar, run the Java-jar metro-1.5.jarA Metro folder is generated under the dire

This article will discuss about Thread pool with fixed number of thread. From Java 5.0 + one can get such pool from Executors using following method-Public static ExecutorServiceNewFixedThreadPool (int nThreads)Creates a thread pool that reuses a fixed number of threads operating off a shared unbounded queue. at any point, at most nThreads threads will be active processing tasks. if additional tasks are submitted when all threads are active, they will

= keystore.getinstance ("JKS"); Clientkeystore.load (New FileInputStream (Clientkeystorefile), Clientkeystorepwd.tochararray ()); KeyStore Clienttrustkeystore = keystore.getinstance ("JKS"); CliEnttrustkeystore.load (New FileInputStream (Clienttrustkeystorefile), Clienttrustkeystorepwd.tochararray ()); Keymanagerfactory KMF = keymanagerfactory.getinstance (Keymanagerfactory.getdefaultalgorithm ()); Kmf.init (Clientkeystore, Foxclientkeypwd.tochararray ()); Tru

Step1: Select the interface "National Weather forecast Interface" aggregated data url:http://www.juhe.cn/docs/api/id/39/aid/87 The example in this article Step2: Each interface needs to pass in a parameter key, which is equivalent to the user's token, so the first step is to apply for a key. step3: The students who have studied Java know that when we do not understand a class or method of their intentions

Java NIO mainly involves the relationship among the Channel, SelectionKey, and Selector classes. The following example shows how to use NIO to process requests :/****/Package dongzi.nio.exe rcise. nio; Import java. io. IOException;Import java.net. InetSocketAddress;Import java.net. ServerSocket;Import java. nio. ByteBu

Struts 2 The default expression language is OGNL, because it has the following advantages over other expression languages:1. Support Object method invocation, such as xxx.dosomespecial ();2. Support class static method invocation and value access, expression format is @[class full name (including package path)]@[Method name | Value name], for example: @java. Lang.string@format (' foo%s ', ' Bar ') or @tutor

Java database connection pool configuration methods (take MySQL database as an example), database connection mysqlSeveral configuration methods for Java Database Connection Pool (taking MySQL database as an example) 1. Tomcat configuration data source: Prerequisites: You need to put the jar package for connecting to th

The first time I wrote a blog, a simple example: Reading and Writing txt files in java, I hope this is a good start ., Javatxt As a beginner developer, I search for others' code on the Internet every day, and then repair, modify, and apply the Code to the project. Without knowing it, I became the code Porter. The fun of programming is to find the code you want in the vast ocean of knowledge, share informati

Introduction to Annotations1.5 The introduction of annotations can be understood as a data that describes data, or as a method of describing metadata. Default annotations provided by Java: @Override, @Deprecated. Annotations are only meta data, and business logic-independent definition methods are in the Java.lang.annotation package Meta Annotations Java provides 4-element annotations to define our annotat

in the parameter when outputting the file:Note: If the path error, such as the deletion of a folder will be an error, as long as the error, even if the folder is set up will still report the directory error (as if there is memory function), then must be restarted Kettle to run correctly. l Use parameters and regular expressions to mix the scenes with the output file:Application of 1.1.3 kettle.properties parameters in Java codeUse variables in 1.1.4

is more thorough, and there is basically no need to make any changes, and there is a corresponding method for the background language. If you know this, it's easy to do. For example, if you want to change this example to a Java version, if the Java architecture does not support authentication, split the homepage into

permissions (these constructors are used for tuning). */Package Org.rui.pattern2;import Java.util.*;import junit.framework.*;/** * In the above example, the static factory () method causes all operations that create objects to be concentrated in one place , which is the only place where you need to change the code. This is certainly a good solution, which encapsulates the process of creating objects. However, the design pattern emphasizes the use of

In the previous article we talked about MongoDB's command to get started, this blog will be based on the database and table established in the previous blog to complete a simple Java MongoDB CRUD Example, the use of Java to connect MongoDB database, and the implementation of database creation, get the table, Routines such as traversing objects in a table, CRUD op

. Reflect. proxy; Public class demodynamicproxy { Public static final void main (final string [] ARGs ){ Someclass proxy = someclassfactory. getdynamicsomeclassproxy (); Proxy. somemethod (); Proxy. someothermethod ("Our proxy works! "); /* Get the handler associated with this proxy instance */Invocationhandler handler = proxy. getinvocationhandler (proxy ); If (handler instanceof methodcountinghandler ){System. Out. println (methodcountinghandler) handler). getinvocationcount ());}} }

Start the code.The first is tag, which is rarely used after college. I didn't expect it to be used again now. The code is as follows:Copy code To write tags, you need to introduce the jstl package. Google will have it. Two packages, one jstl and one standard, are required before 1.2. After 1.2, it seems to be merged into one. To use ajax requests, you need to introduce the jquery package. This is also introduced when echarts is introduced.In the above code, the most important thing is th

development process based on these three major elements. Now let's take a look at a life example, if one day you walk on the road accidentally by a drop in the sky Vase hit, and fainted dead past. The whole process is actually an event-handling process, and we can easily analyze the three major elements of the event-driven model that we just mentioned. 1. The person who is stunned is actually the source of the event, because he is the source of the

parameter constructor that uses the standard JAXP DOMJava code Instead of XPP3 and xmlpull libraries, the XML is parsed using the standard JAXP dom. XStream XStream = new XStream (new Domdriver ()); c) A parameter constructor that uses Stax to parse XMLJava code You don't need a XPP3 library here, but you need to use Java 6. XStream XStream = new XStream (new Staxdriver ()); 3 to convert a

: Public object[] ToArray (); This method returns all the elements in the list to an array of the same size, and all elements in the array are of type object. Public This method returns all the elements in the list to an array of the same size, and all elements in the array are of type T. The list is so designed because the Java compiler does not allow us to new generic arrays. Which means you can't define an array like this: T Arr=new T[size];

Example of remotely calling PHPRPCforJava in java nbsp; PHPRPC is a lightweight, secure, cross-Internet, cross-language, cross-platform, cross-environment, cross-domain, support for transmission of complex objects, support for parameter reference, and support example of remote calls to PHPRPC for java for content-outp

It is an important feature to determine whether a DBMS is powerful and whether external stored procedures are easy to create and use. The ASA database has long been supporting the use of C, CLR (. NET), Java and other programming languages to create stored procedures. The following is a simple example to create a Java-based ASA stored procedure, database (asa11.0