java ee 7 tutorial

action to judge whether there is ink is not human, it is contrary to the idea of object-oriented program design.If you use spring's AOP, it is to write the action as a facet, before each call different pen to write the method, call to determine whether there is ink method. It is defined by the label in the spring configuration file, in the form of:Here, Com.baidu.dao all the way to the beginning of the write to do a tangent, do the operation is to do with the following pointcut-ref= "Allmanager

ZENGXM on 2014/11/4. */@ServerEndpoint ("/websocket/test") public class Hostwebsocketservlet {private static mapIn the HTML page, you can connect to the WebSocket defined above:var url = "ws://" +document.location.host+ "${base}/websocket/test"; var ws = new WebSocket (URL); Ws.onopen = function (e) { console.log ("WS connect success!"); Hostutil.start (); Hostconsole.init (); Listeners.push (Hostconsole); } Ws.onmessage = function (evt) { console.

1. Jdk5.0-jdk. JDK5 annotation, generics, variable parameters and autoboxing, it is difficult to give up after. and annotation more and more applications, if Springside still cling to JDK1.4, will be more and more limitations. If the user's application server only supports JDK1.4, you can use the Retrotranslator compatibility scheme. 2. Spring 2-j2ee Framework. The Java EE full-stack Framework for the te

1. Download the latest Eclipse Java EE version, as: http://www.eclipse.org/downloads/, note that you must choose Java EE version,2.Tomcat download, link to: http://tomcat.apache.org/3. Download the Eclipse Tomcat plugin as: http://download.csdn.net/detail/longshengguoji/78727834. Unzip the downloaded plugin and copy th

J2ee|web|web Services This article discusses how to reference Web services in the Java EE component and find Web services through Jndi. On the content organization, a EJB2.1 stateless session Bean is first published as a Web service, then a Web service client based on JSP is developed, and finally, it focuses on how to reference the Web service in JSP deployment, and discusses how to find and invoke Web ser

J2ee| e-commerce Summary:In this paper, an example is given to analyze the whole process of using the technology architecture of Java EE to build an enterprise-Class e-commerce website, and to analyze the key parts and related technologies, and to put forward a lot of valuable ideas and methods combined with the author's experience. 　　 one. Preface: In recent years, with the rapid development of Interne

);//set the current date ACalendar.add (Calendar.day_of_month, 1);//days plus One - returnFormat.format (Calendar.gettime ()); -}Seven: Convert a JSON string to a Java object1 　　 /** 2 * Get an array of Java objects from a JSON array, such as:3 * [{"id": Idvalue, "name": Namevalue}, {"id": Idvalue, "name": Namevalue}, ...] 4 * @paramObject5 * @paramClazz6 * @return

j2ee| Concept Java Basics: 1, scope public,protected,private, and the difference when not written The difference between 2,arraylist and vectors, HashMap and Hashtable. Can 3,char variable be defined as one Chinese? Why? 4, there are several ways to express multithreading, what is it? There are several ways to achieve synchronization. 5, the Inheritance time class execution order question, generally is the choice question, asks you to be able to

Definition of JDBC:Java Data Base Connectivity,java database connection; is a Java API for executing SQL statements;The steps of the JDBC operation:　1. Registration DriverClass.forName ();2. Get the connectionConnection xxx=drivermanager.getconnection ();3. Writing SQLString sql= "";4. Create PRECOMPILED statement performersPreparestatement yyy=xxx.preparestatement (Sql,username,password);5. Setting paramet

space will occupy a lot of communication bandwidth, so the appropriate time also to compress the data. The separator parameter can play the role of a tuple that contains a string that splits the object.Print Json.dumps ([1,2,3,{' 4 ': 5, ' 6 ': 7}],separators= (', ', ': '))#indent参数是缩进的意思, it can make the format of data storage more elegant.Print Json.dumps ([1,2,3,{' 4 ': 5, ' 6 ': 7}],separators= (', ',

1. Work Flow(1) The Java server creates the WebSocket instance and maintains and waits in the Tomcat container.(2) A client WebSocket instance is created in the browser, then the server is connected and if the connection succeeds, the server triggers the OnOpen event, and the client triggers the OnOpen event.(3) The WebSocket instance in the browser sends a message, websocket.send (' * * * * * * *);(4) The server OnMessage event trigger, parse the mes

First, we open MyEclipse, enter preferences window-perference: as shown:Second, in the upper left corner of the search bar to enter Tomcat, the following will show a few versions of Tomcat, according to your own download version to choose Tomcat, the latest version of MyEclipse has tomcat7.x, this is version 6.x, decisive Click to choose Tomcat 6.x:Three, to choose to start this function, the default is off, that is, the Disable button modified to enable on the line, and then on the above mentio

relationships to achieve cascading saving7 customer.getorders (). Add (order);8 //the order object must be associated with the customer object for inverse to work9 Order.setcustomer (customer);Ten One ATransaction trans =session.begintransaction (); - Session.save (customer); - trans.commit (); the hibernateutils.closesession (); - - } -}In the preceding code, the statement "Order.setcustomer (Customer)" is used to implement the Association of order to the Customer object, and hi

With search, you find a file named Org.eclipse.wst.common.project.facet.core.xml in the. Setting folder under Project, which is configured with various version information. At this point, the problem is solved by modifying the file according to the native configuration.For bugs like me, you can download Tomcat 7. 0 solve, but I am busy trouble, simply in the configuration file Tomcat 6 supports only 1.2, 1.3, 1.4, and

); String SQL = "SELECT * from user" ; Map new Maphandler ()); // The result of the execution encapsulates only the first row. System.out.println (map); /* {id=0001, name=, age=12} */ Ix. Maplisthandler: Encapsulates each row of data into a map and saves it to a list. (Key to Master) Public voidTestselect_maplisthandler ()throwsSQLException {Queryrunner run=NewQueryrunner (DS); String SQL= "SELECT * from User"; ListNewMaplisthandler ()); /*** The result of this statem

1. Prepare tools Eclipse 4.2 (to the official website download: http://www.eclipse.org/downloads/ to download Eclipse IDE for Java EE developers Tomcat 7.x (Tomcat on my machine comes with XAMPP) JDK 7 2. Eclipse 4.2 Configuration Similarly, open the menu window-> preferences and expand server-> runtime environmen

7 Free Java ebooks and tutorials1.Thinking in Java (third Edition)The author of this book is Bruce Eckel, which has always been the best-selling free ebook in Java. This book can help you learn Java in the system, which contains a lot of good code examples. The third edition

installing the JDK. Note: If you need to develop a Java program, you should choose to install the JDK, and of course, after the JDK is installed, the JRE is included, and the Java program can be run, but if you just run Java programs, you need to install the JRE on your computer. Installing only the JVM is not enough. In fact, the download of the JRE is provided

Basic java tutorial-object-oriented (1), Basic java tutorial 1. Object-oriented 1.1 java keyboard input 1.1.1 In my opinion, this method is the simplest and most powerful, that is, using the struct class. Import java. util. secret

Java beginners (Unit 7; Summary of the first six chapters), java Chapter 6 Chapter 1 Summary: 1. java is an advanced programming language launched by sun (Oracle Ltd.) in 1995. java technology can be applied to almost all types and sizes of devices, computer chips, cell phon