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| 实现InitializingBean |
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File: context.xml
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE beans PUBLIC "-//SPRING//DTD BEAN//EN"
"http://www.springframework.org/dtd/spring-beans.dtd">
<beans>
<bean id="nameClass"
class="InitializingBeanNameClass"/>
</beans>
File: Main.java
import org.springframework.beans.factory.BeanFactory;
import org.springframework.beans.factory.InitializingBean;
import org.springframework.beans.factory.xml.XmlBeanFactory;
import org.springframework.core.io.ClassPathResource;
public class Main {
public static void main(String[] args) throws Exception {
BeanFactory beanFactory = new XmlBeanFactory(new ClassPathResource("context.xml"));
InitializingBeanNameClass nameClass = (InitializingBeanNameClass) beanFactory
.getBean("nameClass");
System.out.println(nameClass.getFirstName());
}
}
class InitializingBeanNameClass implements InitializingBean {
private String firstName;
public String getFirstName() {
return this.firstName;
}
public void setFirstName(String firstName) {
this.firstName = firstName;
}
public void afterPropertiesSet() throws Exception {
if (this.firstName == null) {
throw new Exception("firstName property is required.");
}
}
}
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 Spring-RequiredPropertyNotSetException.zip( 2,599 k) |
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