判断两个对象某些字段的值是否相同

1、借助mybatis plus的方法

import com.baomidou.mybatisplus.core.toolkit.LambdaUtils;
import com.baomidou.mybatisplus.core.toolkit.support.SFunction;
import com.baomidou.mybatisplus.core.toolkit.support.SerializedLambda;
import lombok.SneakyThrows;
import org.apache.ibatis.reflection.property.PropertyNamer;import java.lang.reflect.Field;
import java.util.Objects;public class ObjectUtil {/*** 判断两个对象的某些字段的值是否相等* @param newObj 新对象* @param oldObj 旧对象* @param functions 函数式接口数组* @param <T> 泛型T* @return 两个对象某些字段的值是否相等*/@SafeVarargs@SneakyThrowspublic static <T> boolean isSame(Object newObj,Object oldObj,SFunction<T,?>... functions){for(SFunction<T,?> function:functions){Field newField=newObj.getClass().getField(getField(function));Field oldField=oldObj.getClass().getField(getField(function));newField.setAccessible(true);oldField.setAccessible(true);if(!Objects.equals(newField.get(newObj),oldField.get(oldObj))){return false;}}return true;}/*** 判断两个对象的某些字段的值是否相等* @param newObj 新对象* @param oldObj 旧对象* @param fields 字段数组* @return 是否相等*/@SneakyThrowspublic static boolean isSame(Object newObj,Object oldObj,String... fields){for(String filed:fields){Field newField=newObj.getClass().getField(filed);Field oldField=oldObj.getClass().getField(filed);newField.setAccessible(true);oldField.setAccessible(true);if(!Objects.equals(newField.get(newObj),oldField.get(oldObj))){return false;}}return true;}/*** 根据函数式接口的方法获取字段名称* @param sFunction 函数式接口* @param <T> 泛型T* @return 字段名称*/public static <T> String getField(SFunction<T,?> sFunction){return getColumn(LambdaUtils.resolve(sFunction));}/**** @param serializedLambda 函数式接口的Lambda表达式* @return 字段名*/public static String getColumn(SerializedLambda serializedLambda){return PropertyNamer.methodToProperty(serializedLambda.getImplMethodName());}}

既可以直接输入字段名，也可以输入Lambda表达式获取字段名

2、自己手写函数式接口完成从Lambda表达式到字段名的解析

   2.1 先定义可以序列化的函数式接口

import java.io.Serializable;
import java.util.function.Function;@FunctionalInterface
public interface MFunction<T, R> extends Function<T, R>, Serializable {}

  2.2 根据可以序列化的函数式接口解析字段名

         

import lombok.SneakyThrows;
import lombok.extern.slf4j.Slf4j;
import org.apache.ibatis.reflection.property.PropertyNamer;
import java.lang.invoke.SerializedLambda;
import java.lang.reflect.Method;@Slf4j
public class LambdaUtil {/**** @param serializedLambda 函数式接口的Lambda表达式* @return 字段名*/public static String getColumn(SerializedLambda serializedLambda) {return PropertyNamer.methodToProperty(serializedLambda.getImplMethodName());}/*** 根据函数式接口获取字段名成* @param func 函数式接口，例：User::getId()* @param <T> 泛型T* @param <R> 泛型R* @return 字段名*/@SneakyThrowsprivate static <T, R> String getColumn(MFunction<T, R> func) {// 直接调用writeReplaceMethod writeReplace = func.getClass().getDeclaredMethod("writeReplace");writeReplace.setAccessible(true);//反射调用Object sl = writeReplace.invoke(func);return getColumn((java.lang.invoke.SerializedLambda) sl);}}