com.gitee.huanminabc.utils_common.obj.reflect.AnnotationUtil Maven / Gradle / Ivy
package com.gitee.huanminabc.utils_common.obj.reflect;
import java.lang.annotation.Annotation;
import java.lang.reflect.Field;
import java.lang.reflect.Method;
import java.util.HashMap;
import java.util.Map;
public class AnnotationUtil {
//获取类中全部注解和注解对应的方法
public static Map> getAnnotationAll(Class clazz) {
Map> map=new HashMap<>();
//类
Map mapClass=new HashMap<>();
mapClass.put(clazz,clazz.getAnnotations());
map.put("class",mapClass);
//属性
Map mapFields=new HashMap<>();
for (Field declaredField : clazz.getDeclaredFields()) {
declaredField.setAccessible(true);
mapFields.put(declaredField,declaredField.getAnnotations());
}
map.put("fields",mapFields);
//方法
Map mapMethods=new HashMap<>();
for (Method declaredMethod : clazz.getDeclaredMethods()) {
declaredMethod.setAccessible(true);
mapMethods.put(declaredMethod,declaredMethod.getAnnotations());
}
map.put("methods",mapMethods);
return map;
}
//获取指定范围(class,fields,methods)内是否包含指定注解,返回范围对象和注解对象
public static Map getAnnotations(Class clazz,Class annotationType,String scope) {
Map result=new HashMap<>();
Map> annotationAll = getAnnotationAll(clazz);
Map objectMap = annotationAll.get(scope);
for (Map.Entry objectEntry : objectMap.entrySet()) {
for (Annotation annotation : objectEntry.getValue()) {
if (annotation.annotationType()==annotationType) {
result.put(objectEntry.getKey(),annotation);
break;
}
}
}
return result;
}
//获取类指定注解
public static Map getAnnotationsClass(Class clazz,Class annotationType) {
Map map=new HashMap<>();
Map aClass = getAnnotations(clazz, annotationType, "class");
for (Map.Entry objectAnnotationEntry : aClass.entrySet()) {
map.put( (Class)objectAnnotationEntry.getKey(),objectAnnotationEntry.getValue());
}
return map;
}
//获取类中方法指定注解
public static Map getAnnotationsMethods(Class clazz, Class annotationType) {
Map map = new HashMap<>();
Map aClass = AnnotationUtil.getAnnotations(clazz, annotationType, "methods");
for (Map.Entry objectAnnotationEntry : aClass.entrySet()) {
map.put((Method) objectAnnotationEntry.getKey(), objectAnnotationEntry.getValue());
}
return map;
}
//获取类中属性指定注解
public static Map getAnnotationsFields(Class clazz, Class annotationType) {
Map map=new HashMap<>();
Map aClass = AnnotationUtil.getAnnotations(clazz, annotationType, "fields");
for (Map.Entry objectAnnotationEntry : aClass.entrySet()) {
map.put( (Field)objectAnnotationEntry.getKey(),objectAnnotationEntry.getValue());
}
return map;
}
}