java ee 7 certification

another page in a JSP: 1, use the Include indicator ( Method 7: Correctly determine the life cycle of the JavaBean A powerful place for JSP is the support of JavaBean. By using the label in a JSP page, you can insert JavaBean directly into a JSP page. It is used in the following ways: "Package.classname" type= "TypeName" The scope attribute indicates the life cycle of the bean. The default life cycle is page. If you don't choose your

First, SVNSVN server: https://subversion.apache.org/1. What is version control: Versioning is the standard way to maintain a blueprint for a project that tracks the process from birth to finalization. is a system that records changes in several file contents so that a specific revision of the system can be consulted in the future.2. What are the bad things that happen without versioning:(1) Code Management Confusion(2) Backing up multiple versions, consuming large disk space(3) Difficulty in res

connection 7. Applets cannot act as a network server, listening to or receiving connection requests from remote systems 8. Applets are not allowed to load dynamic libraries or to define local method call 9. Applets cannot manipulate any thread that is not in their own thread group 10. Applets cannot shut down the JVM. 3 Development Steps Applet program Development main steps are as follows: 1) Choose Edit or Windows Notepad as editor to build

bitwise operators 2 and interview questions) A: Use of case presentation >>,>>>, >>: The right shift is 0, the left side is 0, the maximum is 1, the left side is 1 >>>: Unsigned right shift whether the highest bit is 0 or 1, the left side is 0 The results of 2 * 8 are calculated most efficiently 6. Java Language Basics (basic usage of ternary operators) A: The format of the ternary operator (R

Core technology in Java EE 13 (1)extensible Markup Language (XML)XML is a language that can be used to define other markup languages (2) JavaServer Pages (JSPs)used to create dynamic Web pages (3)Java servlets Most of the features offered are similar to JSPs, but are implemented in different ways (4)Java Datab

Overall understanding of Java EE TechnologyOutline1. Overview2, the design purpose of Java EE3. Java EE architecture4. Specific understanding of Java EEResources1, https://www.cnblogs.com/android-blogs/p/5632260.html, here are the

In the process of configuring the Java EE development environment encountered a lot of problems, in this system to tidy up my previous configuration processNote: The configuration process is learned from the Jspservlet study notes (second Edition) detailed process can read this book. All my development tools will be posted at the end of the articlefirst, prepare the development environment1. Install TomcatH

file is as follows: 1Resourcepatternresolver RP =Newpathmatchingresourcepatternresolver ();2 3 //Empty 1, here can be filled in classpath or File,classpath is the project SRC directory as the starting point, file is the drive letter as the starting point. 4 //empty 2, is the path + name of the file. 5Resource Resource = Rp.getresource ("Empty 1: Empty 2");6 7 8 //classpath*9 //empty 1 after adding *, such as classpath*, this means, in

class can make public, protected, and default types, but the abstract methods in an interface can only be of the public type, and the default adornment is the public abstract type. 5. Abstract classes can contain static methods, and interfaces cannot contain static method 6. Both abstract classes and interfaces can contain static member variables, and the access types of static member variables in an abstract class can be arbitrary, but the variables defined in the interface can only be public

JMeter is an Apache Jakarta project that is used for software stress testing (Load test), which allows for stress testing not only for HTTP, but also for databases (via JDBC), FTP, Web Service, Java objects, and more. Recently, it was used in our project. Our project is based on the BEA WebLogic, a Java EE project that deploys 3

, really thank Wang Jian teacher. Do not repeat. See the previous Baseservlet principle.6.STRUTS2 's first small project: hello,world!(1) The basic packages that should be added include: Asm-3.3.jar, Asm-commons-3.3.jar, Asm-tree-3.3.jar, Commons-fileupload-1.3.1.jar, Commons-io-2.2.jar , Commons-lang-2.4.jar, Commons-lang3-3.2.jar, Commons-logging-1.1.3.jar, Freemarker-2.3.22.jar, Javassist-3.11.0.ga.jar, Ognl-3.0.6.jar, Struts2-core-2.3.24.jar, Xwork-core-2.3.24.jar a total of 13 bags.(2) Modi

Struts is one of the three most famous SSH frameworks, still playing an important role in the Java Web today, in the MVC mode, which is responsible for the various JSP pages and action scheduling control (Controller), the following is the basic configuration of Struts2 under Eclipse.First, the preparatory work1. Before the struts configuration, the Eclipse environment variables are configured by default and the Tomcat server is deployed;2. Download th

page, but the variables defined in the method are only valid in the method.Example:1 2 3 String SayHello () {4 return "Hello"; 5 } %>6 ③, declaring classSyntax: Note: The classes declared in the JSP page are valid throughout the page.Example:123 Public classsayhello{4 BooleanCounty;5SayHello (BooleanCounty) {6 This. county=County;7 }8 String Hello () {9 if(county)Ten return"Hello"; One Else A

Java EE session mechanismHTTP protocol: before you talk about the session, you must say the HTTP protocol, HTTP is a standard (TCP) for client and server-side requests and responses. A request is initiated by an HTTP client to establish a TCP connection to the server-specified port (by default, port 80). The HTTP server listens on that port for requests sent by the client. Once the request is received,

1. Click File->new->other to select Maven Project2. Select Maven Project, click Next, and then click Next to enter the following screenSelect the last one and click Next3. See the following interfaceEnter the group ID and artifact ID, click Finish to complete the basic creation4. Create a good project structure (Java view)If it is a Java EE view, the project stru

methods here. The default is to load the profile in the SRC Directory///3, create a level cache based on profile information, Sessionfactory heavyweight objects, and do not create sessionfactory factory=config.buildsessionfactory frequently ( );//4, create session open sessions session=factory.opensession ();//5, open transaction transaction transaction= Session.begintransaction (); Student student=new Student (null, "Mikyou", 22, "male"), Session.save (Student);//6, transaction commit transact

USER ' root ' @ ' localhost ' identified by ' new password '; Note: My.ini is encoded as ANSI when saved, otherwise the following error is reported: Error:found option without preceding group in config File:d:\program files\ Mysql-5.6.25-winx64\my.ini at Line:1 Fatal error in defaults handling. Program aborted. Click to download configuration file7. Maven Configuration7.1. Open environment variable 7.2, new M2_home, Maven_home, value C:\Soft\Develop\apache-maven-3.5.07.3, modify path, append%m2

System integration Weak. Minimal need to integrate with other systems 7 User interaction Weak. The interaction is not many, the expression way is simple, more is the data deletion and modification to investigate. 8 Development process Emphasis on agile, rapid development, and basically do not need version control. By simple comparison, it is obvious that Internet development empha

that I not only with the old man guerrilla, sometimes sleep in the computer City Square bench, in the morning to look at the first sight is security and his side to me overlooking the unequaled wolf Dog. After understanding the ASP and the website, began to consider to learn more things, at this time I have given up my dream of writing a game program, because I do not know how to pursue this dream. I also gave up my more good SCM development (now should be called embedded). I turned to

() {while (true) {synchronized (obj) {if (tickets 19, multi-threaded (railway station ticket sales example with the implementation of the Runnable interface)20. Multi-threaded (deadlock) If synchronization code is nested and the same lock is used, the deadlock may occur Try not to nest using private static String S1 = "Chopsticks Child Left ";p rivate static String s2 =" chopstick right ";p ublic static void Main (string[] args) {new Thread () {public