head first j2ee

Differences in concepts of JDK, J2EE, j2se, and J2EE 1. JDK is a Java development toolkit, which is equivalent to a Java library function. Is to compile and run JavaProgram. So what is JDK? What is the difference between it and SDK? The SDK is the abbreviation of software development kit ". This is a widely used term. It can be said that the collection of documents, examples, and tools used to assist in

Why do we need to distinguish J2EE containers from J2EE application systems? We know that a J2EE application system can run only when deployed in a J2EE container. Why is it divided into a J2EE container and a J2EE application

Author: Weng Chi original Email: wcy@email.com published forum: www.javaresearch.org [Editor's note] I wrote this article to help beginners of J2EE in China, hoping to help Java enthusiasts. If you need to reprint the content, contact the author. This article will teach J2EE beginners step by step to configure a standard J2EE environmentI tried to configure the

After learning J2EE videos, the three series of videos feel so difficult to understand, during the video, the general framework of J2EE and EJB has been recorded and organized. next we will summarize some key points in the learning process! What is J2EE? To know what J2EE is, first understand what Java is? Java isSimpl

What is J2EE (1) and J2EE (1)1. J2EE Concept Currently, the Java 2 Platform has three versions. These are the Micro version of Java 2 Platform (Java 2 Platform Micro Edition, j2_based) applicable to small devices and smart cards) java 2 Platform Standard Edition (J2SE) for desktop systems and Java 2 Platform Enterprise Edition (Java 2 Platform Enterprise Editi

Java has developed into three main parts by application: j2se, j2-and J2EE. These three modules complement each other and have different application scopes.J2se is the standard version of Java2 and is mainly used for programming desktop applications;Mainly used for embedded system development, such as mobile phone and PDA programming;J2EE is the Enterprise Edition of Java2. It is mainly used for the develop

J2EE development framework construction (2) and j2ee development framework construction 1. Open the pom. xml file under the hqhop-framework-parent Project, add springmvc4, spring4, hibernate4, and the dependent packages and plug-ins of the druid data source. The dependent package version number Add the maven-compiler-plugin plug-in to the pom. xml file: Add the previous version information to the pom.

Need to understand the j2ee framework and j2ee framework As long as you use java for WEB applications, you must use the j2ee framework. L \ 5qa _ {zY (/VW K :) Zt * am;1) struts 2) spring 3) hibernate 4) ibatis 5) other similar frameworks such as spirngMvc, as well as cache frameworks frequently used in the project architecture, such as memcached, ehcache, o

Unveil J2EE and unveil J2EEFor beginners who first started learning java, they should first know the java version. java has introduced three versions: J2SE, J2EE, and J2SE, which contain the original core class library. J2EE features are comprehensive and used for data processing and server-side applications. It is mainly used for embedded devices such as mobile

J2EE file upload and download summary, j2ee File Upload SummaryI. File Upload Upload process: 1. upload files on jsp pages 2. Obtain the file stream in the background (the principles are the same and the implementation methods are different. Sevelet is generally obtained from HttpServletRequest using ServletFileUpload; Struts2 will automatically encapsulate the File stream as a File object; springmvc will b

Use Maven to write j2ee projects, and maven to write j2ee ProjectsStep 1: Use Maven to create a web project Is it easy?Step 2 Many people do not have source files in src/main/java after the creation. solution: 1. Directly new ResourceFloder, src/main/java, src/main/Resource, src/test/java, src/test/Resource are basic folders. 2. You can also directly modify the content of. classpath. Note: Use maven

J2EE Notes 2, j2ee notes 1. Deploy and start the tomcat server.1). Extract the apache-tomcat-6.0.16.zip to a non-Chinese directory2) configure an environment variable. java_home (pointing to the JDK installation root directory) or jre_home3) double-click startup. bat in the apache-tomcat-6.0.16 \ bin directory to start the server.4). Enter localhost: 8080 in the browser to check whether Tomcat is correctly

As mentioned above, different vendors provide their own J2EE solutions, such as IBM WebSphere and BEA WebLogic. All the examples in this book are run in a reference implemention) the reference implementation is provided by Sun free of charge, which fully complies with J2EE specifications. It should be noted that this reference implementation is just a working model and is not suitable for enterprise-level d

after JDK, tomcat, and eclipse are installed, and tomcat-plugin and lomboz-plugin required for JSP development are installed, the J2EE development environment has been set up. However, in case of computer poisoning, the system needs to be reinstalled once and for all, this complicated process has to be re-launched. Therefore, it is best to install these systems in the same root directory from the very beginning, for example, E: \

In my experience as a developer, Senior developer, or architect, I have encountered good, bad, or even ugly enterprise-level Java projects. When I ask myself what makes a project succeed and another failure, I find it difficult to get a perfect answer, as if it is difficult to define all software projects with success. The J2EE project is no exception. Therefore, projects are divided into different levels of success or failure. In this article, I main

J2EE development framework (6) and j2ee development framework There are many orm frameworks, such as guzz, hibernate, and mybaits ...., when encapsulating a framework, we can choose one or more implementations for future use. Here I only implement hibernate, And the directory structure is as follows: 1. first, query the BaseRepository interface. This interface is generic: T indicates the object type, and I

How to deploy the j2ee Project Server ?, J2ee project deployment 1. Right-click the Project and choose "1"> "Project"> "Add 1: Figure 1 2. Click Add> Server (Tomcat 7.x)> Finish 2: Figure 2 3. OK! The J2EE project needs to run through the Deployment Server. What are common deployment servers? In java, tomcat or wbelogic is generally used (less)This i

In my experience as a developer, senior developer, or architect, I have encountered good, bad, or even ugly enterprise-level JAVA projects. When I ask myself what makes a project succeed and another failure, I find it difficult to get a perfect answer, as if it is difficult to define all software projects with success. The J2EE project is no exception. Therefore, projects are divided into different levels of success or failure. In this article, I main

J2EE includes the following technologies:EJB: Enterprise JavaBeans Enterprise JavaBean ComponentIDL: Interface Definition LanguageJMS: Java Message ServiceJNDI: Java Naming and Directory Interface Java Naming Directory InterfaceRMI: Remote Method Invocation Remote Method callJTA: Java Transaction APIJTS: Java Transaction ServiceObject Serialization: Object SerializationJavaMail: Java Mail ServiceJDBC: database access APIJSP: Java Server PagesServlet:T

Digress: It was just half a year ago when I got started with java. When I first learned java well, I forgot cpp. Now I have put the hot cpp in my hand and picked it up again, can I remember these two OOP languages clearly? All of the following are from Teacher Liu Yan of Tongji University (EnterpriseJavaProgramming) 1. What is Servlet? When I learned J2EE for almost a month, I suddenly began to ask myself, but what is the role of Servlet in MVC Patter