The pros and cons of Struts Hibernate and Springframeworks.docx

1、The pros and cons of Struts Hibernate and Spring frameworksThe pros and cons of Struts, Hibernate, and Spring 3 frameworksThe struts framework has the advantages of modularity, flexibility and reuse, while simplifying the development of MVC based web applications.Advantages:Struts, like many Apache

2、projects such as Tomcat and Turbine, is open source software, which is one of its great advantages. Enable developers to learn more about their internal implementation mechanisms.Beyond that, the benefits of Struts are primarily focused on two aspects: the Taglib and the page navigation. The Taglib

3、is a tag library for Struts that is flexible enough to greatly improve development efficiency. In addition, as far as the current domestic JSP developers are concerned, it is very rare to develop your own tags in addition to the commonly used tags brought in by JSP, and perhaps Struts is a good star

4、ting point.As for page navigation, I think thats going to be a development in the future, in fact, to make the context of the system clearer. By using a configuration file, you can grasp the connection between the parts of the system, which is of great benefit to later maintenance. This is especiall

5、y true when another developer takes over the project.In addition, struts is an industry standard (many successful cases), rich in learning resources, and excellent HTML tagsDisadvantages:Taglib is one of the advantages of Struts, but for beginners, but need a process of continuous learning, can even

6、 disrupt your web page in the habit of writing, but, when you get used to it, you will feel its really good.Struts split the Controller of MVC into three, adding to the complexity of the system while gaining clarity.ActionForms is not used for unit testing (StrutsTestCase can only be used for integr

7、ation)Struts, like many Apache projects such as Tomcat and Turbine, is open source software, which is one of its great advantages. Enable developers to learn more about their internal implementation mechanisms. The Struts open source framework was created to make it easier for developers to build We

8、b applications based on Java servlets and JavaServer Pages (JSP) technologies. The Struts framework provides a unified standard framework for the open, which allows developers to focus more on the business logic of the application by using Struts as a foundation. The Struts framework itself is a mod

9、el-view-controller (MVC) implementation using Java servlets and JavaServer Pages technology.Specifically, the advantages of Struts are:Implement the MVC pattern, and the structure is clear, allowing developers to focus on the implementation of the business logic.Rich tags can be used, and the Struts

10、 tag library (Taglib), if flexible, can greatly improve development efficiency. In addition, as far as the current domestic JSP developers are concerned, it is very rare to develop your own tags in addition to the commonly used tags brought in by JSP, and perhaps Struts is a good starting point.Page

11、 navigation is going to be a development in the future, in fact, to make the context of the system clearer. By using a configuration file, you can grasp the connection between the parts of the system, which is of great benefit to later maintenance. This is especially true when another developer take

12、s over the project.Provide Exception handling mechanisms.Database connection pool management6. Support the I18NA, go to display layer, need to configure forward, every time go to the show layer, that most are directly transferred to the JSP, and involves turning, need to configure forward, if there

13、are ten shows the JSP layer, need to configure the struts, ten times and does not include directory and file changes, sometimes need to modify the forward, note that every change configuration, request to redeploy the whole project, and tomcate this server, also have to restart the server, if the bu

14、siness change complex frequent system, such as simple operation unthinkable. Now thats it, dozens of people are using our system online at the same time, and you can imagine how big my worries are.The Action of Struts must be thread-safe, which allows only one instance to handle all requests. So all

15、 the resources that action USES must be synchronized, which raises the issue of thread-safety.Each Action of Struts is coupled with the Web layer, so that its tests depend on the Web container, and unit tests are difficult to implement. However, a Junit extension tool, Struts TestCase, can implement

16、 its unit tests.Four, type conversion. Strutss FormBean USES all the data as a String type, which can be transformed using the tool Commons - Beanutils.But its transformation is at the Class level, and the type of transformation is unconfigurable. The error message returned to the user is also very

17、difficult.5, the dependency on servlets is too strong. Struts needs to rely on ServletRequest and ServletResponse to handle Action, and all it cant get rid of the Servlet container.The front-end expression language aspect. Struts integrates JSTL, so it mainly USES the expression language of the JSTL

18、 to get the data. However, the expression language of the JSTL is very weak in the Collection and index properties.7, the control of Action execution is difficult. Struts creates an Action and it will be very difficult to control its execution order. You may even want to rewrite the Servlet to imple

19、ment your functional requirements.Eight, to Action before and after treatment. The Struts processing when the Action is based on the class hierarchies, it is difficult to operated in Action before and after processing.Nine, support for events is not enough. In the struts, is actually a Form the Form

20、 corresponding to an Action class (or DispatchAction), in other words: in the struts is actually a Form corresponding to an event, only the struts this event is called application event, application event and component compared to the event is a coarse-grained events.Struts important actionforms for

21、m object is an object, it represents a kind of application, this object contains at least a few fields, these fields are the Jsp page in the form input field, as a form corresponding to an event, so that when we need to refine the event granularity to form in the field, that is, a field correspondin

22、g to an event, simply use the Struts is unlikely, of course, by combining turn JavaScript can be implemented.2. HibernateHibernate is an open source object-relational mapping framework, it is very lightweight for JDBC object encapsulation, make the use of Java programmers can follow ones inclination

23、s to manipulate the database object programming thinking.Hibernate can be used in any situation, using the JDBC can in the Java client program, practical, and can also be used in the Servlet/JSP Web application, the most revolutionary significance is that Hibernate can replace the CMP in EJB of J2EE

24、 application architecture, to complete the important task of data persistence.Most development organizations often adopt data persistence layers that create separate data. Once the underlying data structure changes, the cost of adapting the rest of the application to this change will be enormous. Hi

25、bernate duly fills this gap, providing an easy-to-use, efficient object-relational mapping framework for Java applications. Hibernate is a lightweight persistence framework that is rich in functionality.Advantages:A.h.ibernate USES the Java reflection mechanism instead of the bytecode enhancement pr

26、ogram to achieve transparency.B.H ibernates performance is excellent because its a lightweight framework. The flexibility of mapping is excellent.It supports a variety of relational databases from one-to-one to many-to-many complex relationships.Cons: it limits the object model you use. (for example

27、, a persistence classes cannot be mapped into multiple tables) its unique interface and poor market share also disturbing, nonetheless, Hibernate or with its powerful momentum to mitigate these risks. Other open source persistence frameworks also have some, but none of them have a market impact like

28、 Hibernate.Above post a little passion, in the hope that understanding, I love you not because of some people criticize the Hibernate and uncomfortable, but because of who I am inside the post view really made me feel ridiculous. No matter what you think of Hibernate as a good thing, the only thing

29、Im sorry about is that you cant find a really high-level evaluation of Hibernate in the Chinese BBS. On TSS has a hot about Hibernate thread, with hundreds of paste, including Hibernate author Gavin and LiDO JDO CTO, for JDO and Hibernate had some heated argument, I have the patience to see it again

30、, still have not found to Hibernate really powerful attack, the so-called attack just to Hibernate without a GUI configuration tool, no commercial company support, not standardized, and so on these untenable reason.Here are some Suggestions:One, Hibernate is the lightweight object encapsulation of J

31、DBC, an independent object persistence layer framework, and App Server, which is not necessarily associated with ejbs. Hibernate can be used in any situation where JDBC can be used,For example, the database access code for the Java application, the implementation class for the DAO interface, and eve

32、n the code for accessing the database in BMP. In that sense, Hibernate and EB are not a category thing, and there is no such thing as an either/or relationship.Second, Hibernate is a closely associated and JDBC framework, Hibernate compatibility and JDBC driver, and the database has a certain relationship, and the Java program that USES it, however, doesnt have anything to do with the App Server, there is no compatibility problems.Hibernate cant be used to compare directly with Entity beans, only in the framework of the entire J2EE project. And even in the whole software framework, Hiberna