java反射获取父类和子类字段值、赋值

import org.springframework.util.ReflectionUtils;

import java.lang.reflect.Field;
import java.util.*;


public static void setValueByPropName(String tar, Object o, Object val, Class clazz) {
    Field field = getFiled(tar, clazz);
    field.setAccessible(true);
    ReflectionUtils.setField(field, o, val);
}

public static Field getFiled(String tar, Class clazz) {
    String error = null;
    Field field = null;
    while (clazz != null) {
        try {
            field = clazz.getDeclaredField(tar);
            error = null;
            break;
        } catch (Exception e) {
            clazz = clazz.getSuperclass();
            error = e.getMessage();
        }
    }
    if (error != null || field == null) {
        throw new RuntimeException("无法获取源字段:" + tar);
    }
    return field;
}


public static Object getValueByPropName(String filedName, Object o, Class clazz) {
    Field field = getFiled(filedName, clazz);
    field.setAccessible(true);
    return ReflectionUtils.getField(field, o);
}

调用方式：

// 获取id的值

Object var = getValueByPropName("id", a, clazz);

// 赋值name -> lisi

setValueByPropName("name", a, "lisi", clazz);