@ImportResource in spring imports application xml in configuration file which is using @Configuration. All the beans and other properties defined in application xml can be imported. @ImportResource helps when we are moving our application from old style of defining bean in xml to modern way of defining bean in java file with the help of @Configuration.

 In the below example we have one bean defined in xml and one bean defined in java file. We will import the xml with help of @ImportResource and will fetch both beans. 

app-conf.xml

AppConfig.java

package com.concretepage;import org.springframework.context.annotation.Bean;import org.springframework.context.annotation.Configuration;import org.springframework.context.annotation.ImportResource;@Configuration@ImportResource("classpath:/app-conf.xml")public class AppConfig  {    @Bean(name="entitlement")    public Entitlement entitlement(){        Entitlement ent= new Entitlement();        ent.setName("Entitlement");        ent.setTime(20);        return ent;    }}

Entitlement.java

package com.concretepage;public class Entitlement {    private String name;    private int time;    public String getName() {        return name;    }    public void setName(String name) {        this.name = name;    }    public int getTime() {        return time;    }    public void setTime(int time) {        this.time = time;    }}

Subscription.java

package com.concretepage;public class Subscription {    private String name;    private String type;    public String getName() {        return name;    }    public void setName(String name) {        this.name = name;    }    public String getType() {        return type;    }    public void setType(String type) {        this.type = type;    }    }

AppTest.java

package com.concretepage;import java.sql.SQLException;import org.springframework.context.annotation.AnnotationConfigApplicationContext;public class AppTest {    public static void main(String[] args) throws SQLException {        AnnotationConfigApplicationContext ctx = new AnnotationConfigApplicationContext();        ctx.register(AppConfig.class);        ctx.refresh();        Entitlement ent= (Entitlement)ctx.getBean("entitlement");            System.out.println(ent.getName());                    System.out.println(ent.getTime());        Subscription sub= (Subscription)ctx.getBean("subscription");            System.out.println(sub.getName());                    System.out.println(sub.getType());    }}

Output

Entitlement20Subscription Weekly

 

参考文献：

【1】http://www.concretepage.com/spring/example_importresource_spring