com.zhuang.data.util.ReflectionUtils Maven / Gradle / Ivy
package com.zhuang.data.util;
import java.lang.annotation.Annotation;
import java.lang.reflect.Field;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
import java.util.ArrayList;
import java.util.List;
/**
* @author zhuang
**/
public class ReflectionUtils {
public static Object getFieldValue(Object target, Class clazz, String fieldName) {
try {
Field field = getDeclaredField(clazz, fieldName);
field.setAccessible(true);
return field.get(target);
} catch (Exception e) {
throw new RuntimeException(clazz.getName() + "." + fieldName, e);
}
}
public static Object invokeMethod(Object target, Class clazz, String methodName, Object... args) {
try {
Method method = clazz.getMethod(methodName);
return method.invoke(target, args);
} catch (Exception e) {
throw new RuntimeException(clazz.getName() + "." + methodName, e);
}
}
public static Field getDeclaredField(Class clazz, String fieldName) {
for (Class tempClazz = clazz; tempClazz != Object.class; tempClazz = tempClazz.getSuperclass()) {
try {
Field field = tempClazz.getDeclaredField(fieldName);
if (field != null) return field;
} catch (Exception e) {
}
}
return null;
}
public static Field[] getDeclaredFields(Class clazz) {
List fieldList = new ArrayList<>();
for (Class tempClazz = clazz; tempClazz != Object.class; tempClazz = tempClazz.getSuperclass()) {
try {
Field[] fields = tempClazz.getDeclaredFields();
for (Field field : fields) {
if (!fieldList.stream().anyMatch(c -> c.getName().equals(field.getName()))) {
fieldList.add(field);
}
}
} catch (Exception e) {
}
}
Field[] result = new Field[fieldList.size()];
return fieldList.toArray(result);
}
public static A getAnnotation(Class clazz, Class annotationClass) {
for (Class tempClazz = clazz; tempClazz != Object.class; tempClazz = tempClazz.getSuperclass()) {
try {
A annotation = tempClazz.getAnnotation(annotationClass);
if (annotation != null) {
return annotation;
}
} catch (Exception e) {
}
}
return null;
}
}