learn j2ee

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 and is mainly used for distribu

execution page turns to forward request processing to the next page (for example, JSP: Param: used to pass parameters. It must be used with tags of other supported parameters. JSP: include: Used to dynamically introduce a JSP page (dynamic loading, loading only when page requests) JSP: Plugin: used to download JavaBean or applet to the client for execution JSP: usebean: Create a JavaBean instance JSP: setproperty: Set the attribute value of the JavaBean instance JSP: getproperty: o

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

. Summary J2EE is a set of technical architecture completely different from traditional application development. It contains many components, which can simplify and standardize the development and deployment of application systems, thereby enhancing portability, security, and reuse value. The core of J2EE is a set of technical specifications and guidelines, which contain various components, service arc

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

beginning. Check all ideas in the design and consider whether your application can run properly when it is running on multiple servers. This rule is applicable not only to the application code in the preceding situations, but also to MBean and other management interfaces. Avoiding stateful usage is not just a recommendation for IBM/WebSphere, it is a basic J2EE design principle. 8. Use transactions managed by containers.

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

very beginning. Check all ideas in the design and consider whether your application can run properly when it is running on multiple servers. This rule is applicable not only to the application code in the preceding situations, but also to MBean and other management interfaces. Avoiding stateful usage is not just a recommendation for IBM/WebSphere, it is a basic J2EE design principle. 8. Use transactions managed by containers.

At present, there are more and more J2EE learners. With the continuous development of J2EE technology, various new concepts have emerged. I hereby write this article, the purpose is to explain these concepts to beginners from an easy-to-understand perspective, so that everyone can learn the J2EE learning direction and

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.

preceding situations, but also to mbean and other management interfaces. Avoiding stateful usage is not just a recommendation for IBM/websphere, it is a basic J2EE design principle. 8. Use transactions managed by containers. Learn about the two-phase commit transactions in J2EE and use this method instead of opening up your own transaction management. Containers

allows programmers to quickly develop, publish, and manage cross-platform, component-based enterprise-level applications.2. assumerver pages, JSP technology provides a simple and fast way to create dynamic web pages. With this feature, you can quickly develop web-based applications that are irrelevant to the platform. Because JSP is very similar to ASP, it is easy for people familiar with ASP to learn it.3. java servlet provides application interface

12 most important J2EE best practices (1) -- Linux general technology-Linux programming and kernel information. The following is a detailed description. Best practices 1. Always use the MVC framework. 2. apply automatic unit testing and test management at each layer. 3. develop according to the specifications, rather than the application server. 4. Plan to use J2EE Security from the very beginning. 5. crea

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

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

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