head first j2ee

Create a J2EE applicationYou cannot directly deploy enterprise components (EJBs) to a J2EE Server. You must add the components to a J2EE application before deploying them. In this section, you will create a new J2EE application called ConverterApp and save it as ConverterApp. ear.1. Start the

To build a high-performance J2EE application, you must understand common implementation skills. The following describes the 10 most commonly used effective methods to help architects quickly become experts in this field. Java performance basics-memory management The performance of any Java application, standalone or J2EE can be attributed to how your application manages memory. Java memory management inclu

Picking a Winner:. NET vs. J2EE Although both frameworks stand on a foundation of programming versions, object models and virtual machines, they are strikingly different when you consider the design goals of their runtime environment. The Java 2 Enterprise Edition (J2EE) framework has captured significant mindshare among online application developers and their organizations, as a powerful, portable and wid

The spring + easyjweb + ibatis J2EE online shopping jpetstore system is developed by the easyjf team. The business layer and persistence layer use the jpetsotre source code on springframework, and the presentation layer uses easyjweb, this system is a simple J2EE online store system, including product list, shopping cart, user management, online order and other functions. Source code: http://dl.easyjf.co

In distributed enterprise applications, asynchronous messaging is used to effectively coordinate the work of each part. J2EE provides JMS and message-driven bean for asynchronous message transmission between various components of the application. 1. What is a message system? Generally, a messaging system allows reliable asynchronous communication between separate uncoupled applications. In enterprise applications, an asynchronous, non-blocking messag

I,Description During large-scale J2EE project development, middleware such as Weblogic is often used as the application server to facilitate database connection pools, tuxedo services, and server cluster configuration.However, eclipse does not have WebLogic by default for server support. Therefore, you need to manually install the configuration. I personally do not like the huge and inflexibility of myeclipse.Describe my ide configuration. II,Oracle E

with ALT + shift) Alt + Shift + R Rename (one of my favorite ones, especially the rename of variables and classes, which saves a lot of labor compared with manual methods) Alt + Shift + M extraction method (this is one of the most common methods in refactoring, especially useful for a lot of mud code) Alt + Shift + C modify the function structure (more practical. N functions call this method and modify it once) Alt + Shift + L extract local variables (you can directly extract some magic

Complete version with link: Http://files.cnblogs.com/lovecindywang/.net.pdf Http://files.cnblogs.com/lovecindywang/j2ee.pdf The open-source and non-open-source platforms (of course, Many of Microsoft's products are also open-source) differ greatly from the following: There are indeed many good open-source products, but the quality is also uneven. The compatibility of different products in different versions is also a problem. Non-Open SourceCommunityThe contribution is relatively smal

I used to encounter this error when I used to patch Bi java. If there are different solutions on the Internet, I 'd like to share my solutions with you: Cannot login to the SAP J2EE Engine UsingUser and password as provided in the filesystem secure store. Enter valid loginInformation in the filesystem secure store usingSAP J2EE engine config tool. For more information, see sap note 701654. In fact, you on

Document directory Transaction Introduction JDBC transactions JTA (xa) Transaction Transaction Introduction 　　Generally, the J2EE Application Server supports JDBC transactions and JTA (Java transaction API) Transactions (usually managed by containers ). Generally, it is better not to use the above three transaction types in the program at the same time, such as nesting JDBC transactions in JTA transactions. Second, the transaction should be compl

data types provided in Oracle: Blob, clob, and nclob: three large objects (LOB) are used to save large image files or formatted text files, such as Word documents and non-text files such as audio and video files, the maximum length is 4 GB. Dizzy data is stored in the database. Bfile: A large binary object file stored outside the database. The maximum length is 4 GB. This type of LOB is used to record changes in the database, however, data is stored outside the database. Raw data types provided

technical options; now it is important to start using more practical, technical products and purchasing tools (especially if we need more training ). Although we have not yet begun to enter the architecture stage, we know that the system must be web-based and cross-platform. At the same time, from prototype to enterprise-level solutions can be expanded. We have learned J2EE, and the IT manager hired by ASDI is also the preferred technology platform.

label: des style blog Io for sp c on CTI 常用的J2EE应用服务器包括Weblogic、WebSphere和Tomcat等，以下是以WebLogic为例给出的计数器。 类别 计数器名称 计数器描述 JVM Heap Size JVM堆大小，该计数器的值是一个实时值 Heap Free JVM可用堆大小，该计数器的值是一个实时值 JDBC Connection Pool Waiting For ConnectionCurrent Count 等待的连接数量。如果该计数器的值持续较大，可能需要考虑增加应用服务器的JDBC连接池 Connections Total Count 总的JDBC连接数 Max Capacity JDBC连接池的总容量。可以通过该计数器和上两个计数器值的比较，获得连接池设置是

For the latest project, record it. First, let the J2EE brothers pass the interface classes implemented by the server Hessian and the public methods of this interface class into and return the classes that need to be serialized to themselves, and copy will also work, you can also compress it into a jar package. The package name and Class Name of the interface-related classes must also be the same as that of the server. The rest is that the client ha