Learning without thinking is not the case, but thinking without learning is dangerous.

The first blog post, to encourage themselves, is to remind themselves that perseverance is the key to success, do not be confused by other material eyes blinded by the mind, thus Wanwusangzhi.

When I was a child, I was always forced to write a diary, and nothing was always written about boring things. Now it is the initiative to write a diary, because the thought matured a lot more than the year. A child should forget one day and be carefree.

Morning to the company also early, read the history and origins of Java EE, summed up with the development of computer technology javase has not been full of people's needs, in the development of large-scale system is very troublesome, not convenient, so Sun developed the Java EE this set of APIs. Among them are JSF,JSP,EJB and other technologies ...

　　 The full name of the JSP is Java Server Pages, which is a simplified Servlet design, called the Java Servers page, which is advocated by Sun Microsystems Company, Many companies are involved in the development of a Dynamic Web page technology standard. JSP technology is a bit like ASP technology, it is in the traditional Web page HTML ( Standard Universal Markup Language subset) file (*.htm,*. HTML), insert the Java Program segment (scriptlet) and the JSP tag (tag) to form a JSP file with the suffix (*.jsp). Web applications developed with JSP are cross-platform and can run on Linux and other operating systems. it implements the Java extension in HTML syntax (in <%,%> form). JSP, like a servlet, is executed on the server side. Usually returned to the client is an HTML text, so the client can browse as long as there is a browser. JSP Technology uses the Java programming language to write tags and scriptlets of class XML to encapsulate the processing logic that produces dynamic Web pages. Web pages can also access the application logic of resources that exist on the server through tags and scriptlets. JSP separates the Web page logic from the display of the web design, supports reusable component-based design, and makes the development of Web-based applications quick and easy. JSP (JavaServer pages) is a dynamic page technology whose main purpose is to separate the presentation logic from the Servlet . Java servlet is the technical foundation of JSP, and the development of a large Web application requires Java servlet and JSP mates to complete. JSP has the simple and easy-to-use Java technology, completely object-oriented, platform-independent and safe and reliable, mainly for the internet all the characteristics. --Quote from Baidu EncyclopediaJSF,EJB are both frame Struts 2 and JSF belong to the presentation framework, but their frame nature is different, the Struts 2 framework is just a simple MVC design pattern implementation Framework, and JSF is essentially an event-driven component model. JSF is more similar to Microsoft's ASP. JSF applications, which make developing Web applications more similar to traditional C/s designs such as Visual Basic, can handle click-button events in Web pages or select drop-down box events, as the core of JSF is event-driven. Using JSF to develop applications, developers can even not care about the traditional Web development details (such as HTTP), the content of the page, or the JavaBean implementation class that the operation can directly correspond to the server side, and the JSF framework automatically encapsulates the interaction.　　The Struts 2 framework is a very traditional MVC design pattern, but the framework is familiar and used by a wide range of programmers, and Struts 2 integrates JSF to make the Web development model acceptable to developers while leveraging JSF's complete package performance. EJB is the Sun's Java EE server-side component model, and the design goal and core application is to deploy distributed applications. In simple terms, a program that has already been written (that is, a class) is packaged and placed on the server for execution. With the advantages of Java cross-platform, distributed systems deployed with EJB technology can be limited to specific platforms. EJB (Enterprise JavaBean) is part of the Java EE, which defines a standard for developing component-based enterprise multi-application applications. Features include network service support and core development tools (SDKs). In Java EE, Enterprise Java Beans (EJB) is called Java Business Bean, which is the core code of the kernel, namely the session bean, the entity bean Bean) and the message-driven bean (Messagedriven bean).

Summary is the JSF used to do the Web server, EJB background, database short server, JSP is nested in the Web page. Because different systems have different layers, some three layers, some four layers, some multilayer ...

Basic can be divided into: 1. Web page 2. Web server 3. Background, database server 4. Database

Summarize today's work: The task today is to do a data deposition, that is, to read the JSON string and then write the data in the JSON string into the database. creat table TableName (F1 char (8), F2 varchar (+) NOT null), using Plsql Right-click to indicate that editing is convenient (write notes, or modify data). However, finally there is a problem, the program run has no error, but the read out of the characters are not written to the database ... This question will be written out after tomorrow's resolution.

　　

Learning without thinking is not the case, but thinking without learning is dangerous.