SPRINGMVC Environment Construction

MyBatis Framework---Persistence layer Framework-->object "objects" relation[relational database]mapping[in MyBatis which mapping file China <resultMap> tags] Framework For the encapsulation of JDBC, a custom SQL statement is required. Dealing with dataaccessobjecT data Access objects

Springmvc It's part of the spring framework, it's just a small module in the Big Spring Framework, and SPRINGMVC is replacing the servlet we learned before.

How do you learn a framework first?

1. Find Jar

2. Configure the core configuration file

3. Read the core configuration file

4. Test Hello World

Read Core profile : MyBatis, it is up to us to read the Mybatis-config.xml Java

SPRINGMVC framework, Web layer, Dynamic Web project

Step one: Find jar[19]

Step two : Set up the core configuration file

The Dispatcherservlet is a actual Servlet (it inherits from the HttpServlet base class), and as such are declared in the c0>web.xml[ Deployment descriptor ] of your Web application. You need to map requests so want the dispatcherservlet to handle, by using a URL of mapping in the same Web. xml file. This is the standard Java EE Servlet configuration; The following example shows such a dispatcherservlet declaration and mapping:

The life cycle of the servlet

Send Request --If you are the first access to get initialization using the server init () method instantiation

--"service method", Judge with Doget, Dopost

<load-on-startup>1</load-on-startup>

<load-on-startup> When the server starts, it is true to the Servlet , and the smaller the value, the higher the priority load </load-on-startup>

The life cycle of JSP [Baidu]

Upon initialization of a dispatcherservlet, Spring MVC looks for a file named [Servlet-name]-servlet.xml In the web-inf Directory of your WEB application and creates the beans defined there, overriding the De Finitions of any beans defined and the same name in the global scope.

Jump:

Request Forwarding : The Address bar path does not change [ default jump mode ]

Redirect: Address bar Change

Configuring the View resolver

caused by:java.lang.IllegalStateException:Ambiguous mapping. Cannot map ' HomeController ' method

SPRINGMVC Environment Construction