com.neko233.toolchain.common.reflect.ReflectUtils233 Maven / Gradle / Ivy
package com.neko233.toolchain.common.reflect;
import java.lang.reflect.Field;
import java.lang.reflect.Method;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;
/**
* 反射工具
*
* @author SolarisNeko on 2022-02-22
*/
public class ReflectUtils233 {
public static Object getValueByField(Object data, String fieldName) {
Object value;
Field field;
Class aClass = data.getClass();
try {
field = aClass.getDeclaredField(fieldName);
} catch (NoSuchFieldException e) {
field = null;
}
Class superclass = aClass.getSuperclass();
if (field == null) {
// 获取最近的 field
field = getFieldShortly(superclass, fieldName);
}
if (field == null) {
return null;
}
field.setAccessible(true);
try {
value = field.get(data);
} catch (IllegalAccessException e) {
return null;
}
return value;
}
/**
* 递归获取 field, 最近的
*
* @param clazz 类
* @param fieldName 字段名
* @return 最近的 field / null
*/
private static Field getFieldShortly(Class clazz, String fieldName) {
Class tempClass = clazz;
while (!"Object".equals(tempClass.getSimpleName())) {
Field field;
try {
field = tempClass.getDeclaredField(fieldName);
} catch (NoSuchFieldException e) {
field = null;
}
if (field != null) {
return field;
}
tempClass = tempClass.getSuperclass();
}
return null;
}
public static List getAllFieldsRecursive(Object obj) {
if (obj == null) {
return new ArrayList<>();
}
return getAllFieldsRecursive(obj.getClass());
}
/**
* 递归获取所有 field
*
* @param schema clazz
* @return 所有字段
*/
public static List getAllFieldsRecursive(Class schema) {
List fields = new ArrayList<>();
Class temp = schema;
while (!"Object".equals(temp.getSimpleName())) {
Field[] declaredFields = temp.getDeclaredFields();
fields.addAll(Arrays.asList(declaredFields));
temp = temp.getSuperclass();
}
return fields;
}
public static Method getMethodByName(Class handlerClass, String methodName) {
for (Method method : handlerClass.getDeclaredMethods()) {
if (method.getName().equals(methodName)) {
return method;
}
}
return null;
}
}