Shulou(Shulou.com)06/03 Report--

This article introduces the relevant knowledge of "how to use Spring family buckets". Many people will encounter such a dilemma in the operation of actual cases, so let the editor lead you to learn how to deal with these situations. I hope you can read it carefully and be able to achieve something!

Create a PersonDao interface

Create a package named com.mengma.ioc under the src directory of the project, download: play with the Spring family bucket, then create an interface named PersonDao in the package, and add an add () method to the interface

Package com.mengma.ioc

Public interface PersonDao {

Public void add ()

}

3. Create an interface implementation class PersonDaoImpl

Create the PersonDao implementation class PersonDaoImpl under the com.mengma.ioc package, as shown below after editing.

Package com.mengma.ioc

Public class PersonDaoImpl implements PersonDao {

@ Override

Public void add () {

System.out.println ("save () executed...")

}

}

In the above code, the PersonDaoImpl class implements the add () method in the PersonDao interface and executes the output statement when the method is called.

4. Create a Spring profile

Create the core configuration file applicationContext.xml for Spring under the src directory, and edit it as shown below.

In the above code, line 2-5 is the constraint configuration for Spring, and line 7 represents the creation of an instance of bean with id as personDao in the Spring container, where id represents the unique identifier in the file, and the class attribute indicates the actual fully qualified class name (package name + class name) that specifies the Bean to be instantiated.

It is important to note that the name of the configuration file for Spring is customizable and is usually named applicationContext.xml (or bean.xml).

5. Write test classes

Create the test class FirstTest under the com.mengma.ioc package, and add a method named test1 () to the class, as shown below after editing.

Package com.mengma.ioc

Import org.junit.Test

Import org.springframework.context.ApplicationContext

Import org.springframework.context.support.ClassPathXmlApplicationContext

Public class FirstTest {

@ Test

Public void testl () {

/ / define the path to the Spring configuration file

String xmlPath = "applicationContext.xml"

/ / initialize the Spring container and load the configuration file

ApplicationContext applicationContext = new ClassPathXmlApplicationContext (

XmlPath)

/ / obtain the personDao instance through the container

PersonDao personDao = (PersonDao) applicationContext

.getBean ("personDao")

/ / call the add () method of personDao

PersonDao.add ()

}

}

In the above code, you first define the path to the Spring configuration file, then create the Spring container, then get the personDao instance through the Spring container, and finally call the save () method of the instance.

This is the end of "how to use Spring buckets". Thank you for reading. If you want to know more about the industry, you can follow the website, the editor will output more high-quality practical articles for you!

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