JAVA annotationÈëÃÅ
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Ò». ×î³£¼ûµÄannotation
@Override:ÓÃÔÚ·½·¨Ö®ÉÏ£¬ÓÃÀ´¸æËß±ðÈËÕâÒ»¸ö·½·¨ÊǸÄд¸¸ÀàµÄ
@Deprecated:½¨Òé±ðÈ˲»ÒªÊ¹ÓþɵÄAPIµÄʱºòÓõÄ,±àÒëµÄʱºò»áÓòúÉú¾¯¸æÐÅÏ¢,¿ÉÒÔÉ趨ÔÚ³ÌÐòÀïµÄËùÓеÄÔªËØÉÏ.
@SuppressWarnings:ÔÝʱ°ÑһЩ¾¯¸æÐÅÏ¢ÏûÏ¢¹Ø±Õ
@Entity:±íʾ¸ÃÀàÊǿɳ־û¯µÄÀà
¶þ. Éè¼ÆÒ»¸ö×Ô¼ºµÄAnnotation
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1. Ö»ÓÐÒ»¸ö²ÎÊýµÄAnnotationʵÏÖ
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package chb.test.annotation;
import java.lang.annotation.Documented;
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
@Target(ElementType.TYPE)
@Retention(RetentionPolicy.RUNTIME)
@Documented
public @interface MyAnnotation1 {
String value();
}
package chb.test.annotation;
import java.lang.annotation.Documented;
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
@Target(ElementType.TYPE)
@Retention(RetentionPolicy.RUNTIME)
@Documented
public @interface MyAnnotation1 {
String value();
}
2. ÓÐÁ½¸ö²ÎÊýµÄAnnotationʵÏÖ
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package chb.test.annotation;
import java.lang.annotation.Documented;
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
@Target(ElementType.METHOD)
@Retention(RetentionPolicy.RUNTIME)
@Documented
public @interface MyAnnotation2 {&
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