Xml for spring Injection

Xml for spring Injection

1. Inject xml into xml for configuration

 

Note: The spring container is executing code

ApplicationContext ctx = new ClassPathXmlApplicationContext (beans. xml );

Key Note: bean name is unique and described in xml file

 

Type 2 diagram

The directory structure is shown in. Here we only test studentService.

 

Dao level

PackageCom. bjsxt. dao;

ImportCom. bjsxt. model .*;

Public interfaceStudentDao {

Public voidStudentSave (Student s );

}

Impl Layer

PackageCom. bjsxt. dao. impl;

ImportCom. bjsxt. dao .*;

ImportCom. bjsxt. model. Student;

 

Public classStudentDaoImplImplementsStudentDao {

 

@ Override

Public voidStudentSave (Student s ){

System.Out. Println (student saved !);

 

}

}

PackageCom. bjsxt. model;

Public classStudent {

Private intId;

PrivateStringname;

Public voidInit ()

{

System.Out. Println (initialization ......);

}

Public intGetId (){

ReturnId;

}

Public voidSetId (IntId ){

This. Id = id;

}

PublicString getName (){

ReturnName;

}

Public voidSetName (String name ){

This. Name = name;

}

Public voidDestroy ()

{

System.Out. Println (destroy ....);

}

}

PackageCom. bjsxt. service;

ImportCom. bjsxt. dao .*;

Import Com. bjsxt. dao. impl.*;

ImportCom. bjsxt. model .*;

Public classStudentService {

PrivateStudentDaostudentDao;

// Reduces coupling: StudentService does not know who will save the student'sIocContainer to control assembly

 

PublicStudentDao getStudentDao (){

ReturnStudentDao;

}

 

Public voidSetStudentDao (StudentDao studentDao ){

This. StudentDao = studentDao;

}

Public voidAdd (Student s)

{

This. StudentDao. StudentSave (s );

}

}

Test class

PackageCom. bjsxt. service;

 

ImportOrg. junit. Test;

ImportOrg. springframework. context. ApplicationContext;

ImportOrg. springframework. context. support. ClassPathXmlApplicationContext;

ImportCom. bjsxt. model. Student;

Public classStudentServiceTest {

@ Test

Public voidTest (){

System.Out. Println (before running the program ....);

ApplicationContext ctx =NewClassPathXmlApplicationContext (beans. xml );

System.Out. Println (program running starts ....);

StudentService sService = (StudentService) ctx. getBean (studentService );

Student student = (Student) ctx. getBean (student );

Student student2 = (Student) ctx. getBean (student );

System.Out. Println (student2 = student );

SService. add (student );

}

}