Spring全注解实例化Bean-----Spring框架

「爱情、让人受尽委屈。」 2024-03-23 23:24 42阅读 0赞

>     package cn.powernode.service;
>     
>     import cn.powernode.dao.StudentDao;
>     import cn.powernode.dao.impl.StudentDaoImplForMySQL;
>     import jakarta.annotation.Resource;
>     import org.slf4j.Logger;
>     import org.slf4j.LoggerFactory;
>     import org.springframework.stereotype.Service;
>     
>     @Service("studentService")
>     public class StudentService
>     {
>     //    @Resource(name = "studentDaoImplForMySQL")
>         private StudentDao studentDao;
>     //    @Resource(name = "studentDaoImplForMySQL")
>         public void setStudentDao(StudentDao studentDao) {
>             this.studentDao = studentDao;
>         }
>         //不能出现在构造方法上,只能出现在类上方法上属性上
>     //    @Resource(name = "studentDaoImplForMySQL")
>         public StudentService(StudentDao studentDao) {
>             this.studentDao = studentDao;
>         }
>     
>         public void deleteStudent()
>         {
>             studentDao.deleteById();
>         }
>     }
> 
> package cn.powernode.service;  
>   
> import cn.powernode.dao.StudentDao;  
> import cn.powernode.dao.impl.StudentDaoImplForMySQL;  
> import jakarta.annotation.Resource;  
> import org.slf4j.Logger;  
> import org.slf4j.LoggerFactory;  
> import org.springframework.stereotype.Service;  
>   
> @Service("studentService")  
> public class StudentService  
> \{  
> // @Resource(name = "studentDaoImplForMySQL")  
> private StudentDao studentDao;  
> // @Resource(name = "studentDaoImplForMySQL")  
> public void setStudentDao(StudentDao studentDao) \{  
> this.studentDao = studentDao;  
> \}  
> //不能出现在构造方法上,只能出现在类上方法上属性上  
> // @Resource(name = "studentDaoImplForMySQL")  
> public StudentService(StudentDao studentDao) \{  
> this.studentDao = studentDao;  
> \}  
>   
> public void deleteStudent()  
> \{  
> studentDao.deleteById();  
> \}  
> \}  
>

>     package cn.powernode;
>     
>     import org.springframework.context.annotation.ComponentScan;
>     import org.springframework.context.annotation.Configuration;
>     
>     @Configuration
>     @ComponentScan
>     public class Spring6Config
>     {
>         //编写一个类代替Spring框架的配置文件
>     
>     }
> 
> package cn.powernode;  
>   
> import org.springframework.context.annotation.ComponentScan;  
> import org.springframework.context.annotation.Configuration;  
>   
> @Configuration  
> @ComponentScan  
> public class Spring6Config  
> \{  
> //编写一个类代替Spring框架的配置文件  
>   
> \}

>     package cn.powernode.dao.impl;
>     
>     import cn.powernode.dao.StudentDao;
>     import org.slf4j.Logger;
>     import org.slf4j.LoggerFactory;
>     import org.springframework.stereotype.Repository;
>     
>     //@Repository("studentDao")
>     public class StudentDaoImplForMySQL implements StudentDao
>     {
>         private static final Logger logger = LoggerFactory.getLogger(StudentDaoImplForMySQL.class);
>         @Override
>         public void deleteById()
>         {
>             logger.info("MySQL数据库正在删除学生信息");
>         }
>     }
> 
> package cn.powernode.dao.impl;  
>   
> import cn.powernode.dao.StudentDao;  
> import org.slf4j.Logger;  
> import org.slf4j.LoggerFactory;  
> import org.springframework.stereotype.Repository;  
>   
> //@Repository("studentDao")  
> public class StudentDaoImplForMySQL implements StudentDao  
> \{  
> private static final Logger logger = LoggerFactory.getLogger(StudentDaoImplForMySQL.class);  
> @Override  
> public void deleteById()  
> \{  
> logger.info("MySQL数据库正在删除学生信息");  
> \}  
> \}

>     package cn.powernode.dao.impl;
>     
>     import cn.powernode.dao.StudentDao;
>     import org.slf4j.Logger;
>     import org.slf4j.LoggerFactory;
>     import org.springframework.stereotype.Repository;
>     
>     @Repository("studentDaoImplForOracle")
>     public class StudentDaoImplForOracle implements StudentDao
>     {
>         private static final Logger logger = LoggerFactory.getLogger(StudentDaoImplForOracle.class);
>         @Override
>         public void deleteById()
>         {
>             logger.info("Oracle数据库正在删除学生信息");
>         }
>     }
> 
> package cn.powernode.dao.impl;  
>   
> import cn.powernode.dao.StudentDao;  
> import org.slf4j.Logger;  
> import org.slf4j.LoggerFactory;  
> import org.springframework.stereotype.Repository;  
>   
> @Repository("studentDaoImplForOracle")  
> public class StudentDaoImplForOracle implements StudentDao  
> \{  
> private static final Logger logger = LoggerFactory.getLogger(StudentDaoImplForOracle.class);  
> @Override  
> public void deleteById()  
> \{  
> logger.info("Oracle数据库正在删除学生信息");  
> \}  
> \}

>     package cn.powernode.dao;
>     
>     import org.springframework.stereotype.Repository;
>     
>     @Repository("studentDao")
>     public interface StudentDao
>     {
>         void deleteById();
>     }
> 
> package cn.powernode.dao;  
>   
> import org.springframework.stereotype.Repository;  
>   
> @Repository("studentDao")  
> public interface StudentDao  
> \{  
> void deleteById();  
> \}

>     @Test
>         public void TestNoXML()
>         {
>             AnnotationConfigApplicationContext annotationConfigApplicationContext = new AnnotationConfigApplicationContext(Spring6Config.class);
>             StudentService StudentService = annotationConfigApplicationContext.getBean("studentService", StudentService.class);
>             StudentService.deleteStudent();
>         }
> 
> @Test  
> public void TestNoXML()  
> \{  
> AnnotationConfigApplicationContext annotationConfigApplicationContext = new AnnotationConfigApplicationContext(Spring6Config.class);  
> StudentService StudentService = annotationConfigApplicationContext.getBean("studentService", StudentService.class);  
> StudentService.deleteStudent();  
> \}