If you do not use Bean annotations, you need to configure the java classes that need to be injected in the Spring configuration file applicationContext.xml, such as
<bean id="userService" class="org.example.test.service.impl.UserServiceImpl">
<property name="sqlSessionTemplate" ref="sqlSessionTemplate"></property>
</bean>
If you inject UserServiceImpl through the Bean method,
first, configure the package in applicationContext.xml to automatically scan the java classes that need to be injected
<context:component-scan base-package="org.example.test.service.impl"/>-
Then configure the @Configuration annotation before the java class that needs to be injected, and then write a method that returns the class, and configure the Bean annotation
UserServiceImpl.java
package org.example.test.service.impl;
import org.mybatis.spring.SqlSessionTemplate;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.stereotype.Service;
import javax.annotation.Resource;
@Configuration
@Service("userService")
public class UserServiceImpl implements UserService {
@Bean(initMethod = "init",destroyMethod = "destroy")
public UserServiceImpl userServiceImpl(){
return new UserServiceImpl();
}
public void init() {
System.out.println("init ............");
}
public void destroy() {
System.out.println(" destroy ...............");
}
@Resource
private SqlSessionTemplate sqlSessionTemplate;
}
You're done