head first j2ee

What is J2EE? In enterprise applications, there are some general enterprise requirement modules, such as database connection, mail service, and transaction processing. since many enterprise applications need these modules, some large companies have developed their own general module services, that is, middleware. this avoids repeated development, long development cycle, and poor code reliability. however, the middleware incompatibility problems of var

The problem of Java Chinese has been plagued by many beginners. If we understand the Chinese problem principle of the Java System, we can take a fundamental solution to the Chinese problem. The oldest solution is to use string bytecode conversion, which is inconvenient. We need to break the object encapsulation and perform bytecode conversion. Another method is to encode the J2EE container. If the J2EE appl

This article is written in my research on J2SE and J2EE in the last three years. In the past three years, I have studied J2SE Swing, Applet, Net, RMI, Collections, IO, JNI ...... The JDBC, Sevlet, JSP, and JNDI of J2EE are studied ..... Soon I found out that this seems too superficial: first, I found that I only know a large number of Apis provided by java and cannot use it well. Second, I have never learne

Original technical experts-CompetitionArticle Title: J2EE-based blog platform [Comment] Author: xuefengl (dev2dev ID) Abstract: This article describes how to create a blog system on the J2EE platform. the text function and interface are prototype, and springframework is the framework to implement a flexible multi-layer blog pl

I do not know basic J2EE knowledge, 2016-09-06j2ee 1. middleware, containers, and Web Servers 1.1 Middleware Middleware is the software that provides the connection between system software and application software, so as to facilitate communication between various software components. Middleware is located between the operating system and higher-level applications. Background of J2EE: 1) requirements for en

Aside: a few days ago, the author's question and worries about a JavaFans were welcomed. Thank you very much! This article is titled "question and worry", which is naturally due to the anxiety generated by the author during his learning process. Therefore, we look forward to your insights to clarify your thoughts and strengthen your faith. In fact, the author is mainly engaged in maintenance work, programming is just a hobby, coupled with a half way out of the house, so I would lik

Standards (OASIS) guidance. The four key criteria define how to create, deploy, discover, and use Web services:Web service standard descriptionSimple Object Access Protocol (SOAP) 1.1 defines transmission and data encodingWeb Services Definition Language (WSDL) 1.1 defines how to describe remote ServicesUniversal Description, Discovery, Integration (UDDI) 2.0 defines how to discover remote servicesExtensible Markup Language (XML) 1.0 and XML Schema define Extensible Markup Language (XML) and X

Debian4 architecture J2EE-Linux Enterprise Application-Linux server application information. The following is a detailed description. I haven't played linux for a while. This time, the customer said that he prefers debian, so I have practiced it now. I have summarized some online materials and shared them with you. I. System Installation Install with CD1, ROOT Password dongjunbiao, new user webuser, password webuser Ii. System Configuration 1. insta

Application of MVC pattern in the J2EE Project (2)Author: FavoYang Email: favoyang@yahoo.com welcomeKeywords: MVC case modelAbstract:If you want to test your knowledge, the best way is to practice her. Using a project named "NOTE" (Notepad) and the MVC pattern to build it, we can see the strength and flexibility of MVC. Note that the term MVC is not used in this article. Instead, it is called boundary class, control class, entity class, and lifecycle

component fields in the Observer mode like listerner, and Struts is a form submission submit trigger mechanism. If the former is more linguistic (the conventional programming language is similar to swing programming); the latter is web-based because it comes from HTML forms. If you start from Perl/PHP, instead, it is easy to accept the struts style. Basic Configuration Struts and JSF are both a framework. JSF must have two packages: JSF core package and jstl package (TAG library). In addition,

Resolve all paths in the J2EE WEB Project The paths used in Java are divided into absolute paths and relative paths. In essence, Java can only use absolute paths to find resources. All relative paths are just some convenient methods to find resources. However, the API helps us build an absolute path at the underlying level to find resources! When developing Web applications, you often need to obtain the physical path of the current webroot on the serv

In the afternoon, my colleague found a problem: After logging on to the same application system and on the same computer with different users, the subsequent users will overwrite the previous user information! The Code is as follows: .................................... _ Request. getsessioncontext (). Add ("user", user ); .................................... At first, I did not agree: it should be so! Otherwise, it would be abnormal! My colleague then asked: What should I do if the cust

This section describes the query condition interfaces in the framework. 1. the entire structure of the condition Query Class 2. the directory structure of the query conditions under the hqhop-framework-common project: 3. Open searchoperator. java. This class contains all query operators and is an enumeration type: Public Enum searchoperator {eq ("equal to", "="), NE ("not equal ","! = "), GT (" greater than ","> "), GTE (" greater than or equal to ","> = "), LT (" less than "," 4. The main im

After a common MVC servlet application is deployed on the sun application server. Migrate to IBM WebSphere 5. Encountered various problems .. To record. 1. For WebSphere J2EE applications, it is best to use WebSphere Studio for deployment. : P 2. Note that the properties file must be placed in the % was_root %/appserver/properties directory to load: S 3. Pay attention to the jdbc jndi. MSSQL datasource is com. Microsoft. jdbcx. sqlserver. sqlserv

Recently, some articles on using eclipse + lomboz + JBoss to develop J2EE on csdn have also searched for related content on Google, and I always think they do not quite understand it. Finally, an old man gave an important link: Http://www.tusc.com.au/tutorial/html/index.html This is a step by step tutorial. Although the software version introduced here is outdated, it does not change much. This tutorial is written in English. After reading the first c

Source: csdn blog published on reading: 5243 recommendations: 5 original article link [favorites] Abstract: the text will show the author's experience in integrated development of Android + J2EE, and hope to be inspired. A long time ago, I heard people say that android will get angry in the future. As a forward-looking person, it will be a good opportunity for transformation to understand it. Javaweb is too mature and saturated. Now there are endless

session to save the temporary-> persistent state 2. the object returned by the load () and get () Methods of the session 3. objects in the list set returned by the find () Operation of the session 4. session Update (), saveorupdate () to make free-> persistent 3. detached features: 1. no longer in session cache 2. the free object changes from the persistent state, and there may be corresponding records in the database. Java: how to enter the Persistence State-> free state 1. session close () me

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

(mod_attrs.size() != 0) initial_ctx.modifyAttributes(dn, DirContext.REPLACE_ATTRIBUTE, mod_attrs); Summary The idea of JNDI is to provide a common interface. The underlying name service time limit can be of various types, and the JNDI uses the SPI time limit code to shield the differences between various names and Directory Service implementations. JNDI can solve the problem of data sharing, distributed applications, and tight coupling. Therefore, it can be applied to a large number