1   遇到这样的需求，在baseservice类中处理数据权限，子类可能使用QueryWrapper或者LambdaQueryWrapper调用base类的方法进行查询。

2  可以拿到的:PO的类，数据权限属性的属性名(是固定的)

   直接上代码：

public static SFunction getSFunction(Class<?> entityClass, String fieldName) {
        if (functionMap.containsKey(entityClass.getName() + fieldName)) {
            return functionMap.get(entityClass.getName() + fieldName);
        }
        Field field = getDeclaredField(entityClass, fieldName);
        if(field == null){
            throw ExceptionUtils.mpe("This class %s is not have field %s ", entityClass.getName(), fieldName);
        }
        SFunction func = null;
        final MethodHandles.Lookup lookup = MethodHandles.lookup();
        MethodType methodType = MethodType.methodType(field.getType(), entityClass);
        final CallSite site;
        String getFunName = "get" + fieldName.substring(0, 1).toUpperCase() + fieldName.substring(1);
        try {
            site = LambdaMetafactory.altMetafactory(lookup,
                    "invoke",
                    MethodType.methodType(SFunction.class),
                    methodType,
                    lookup.findVirtual(entityClass, getFunName, MethodType.methodType(field.getType())),
                    methodType, FLAG_SERIALIZABLE);
            func = (SFunction) site.getTarget().invokeExact();
            functionMap.put(entityClass.getName() + field, func);
            return func;
        } catch (Throwable e) {
            throw ExceptionUtils.mpe("This class %s is not have method %s ", entityClass.getName(), getFunName);
        }
    }