MyBatis拦截器执行流程！！！

前提：将自定义的拦截器注入IOC容器。

1、创建自定义拦截器，实现Interceptor接口，重写interceptor()方法

2、在自定义拦截器上使用@Interceptors注解，在该注解中使用@Signature指定拦截的接口类型，方法名与参数类型。

实例：

/*
 * Copyright (c) 2020, 2024,  All rights reserved.
 *
 */
package com.by.config;

import cn.hutool.core.util.ReflectUtil;
import cn.scl.core.threadlocal.LocalUserUtil;
import lombok.Singular;
import org.apache.ibatis.executor.parameter.ParameterHandler;
import org.apache.ibatis.plugin.Interceptor;
import org.apache.ibatis.plugin.Intercepts;
import org.apache.ibatis.plugin.Invocation;
import org.apache.ibatis.plugin.Signature;
import org.springframework.stereotype.Component;

import java.lang.reflect.Field;
import java.sql.PreparedStatement;
import java.time.LocalDateTime;

/**
 * <p>Project: wms-root - ParameterPlugin</p>
 * <p>Powered by scl On 2024-03-13 10:14:21</p>
 * <p>描述：<p>
 *
 * @author 孙臣龙 [[email protected]]
 * @version 1.0
 * @since 17
 */
@Component
@Intercepts({@Signature(type = ParameterHandler.class,
        method = "setParameters",
        args = {PreparedStatement.class})})
public class ParameterPlugin implements Interceptor {

    /**
     * 统一设置lastUpdateBy的值
     * @param invocation
     * @return
     * @throws Throwable
     */
    @Override
    public Object intercept(Invocation invocation) throws Throwable {
        ParameterHandler parameterHandler = (ParameterHandler) invocation.getTarget();
        Object parameterObject = parameterHandler.getParameterObject();
        Field lastUpdateBy = ReflectUtil.getField(parameterObject.getClass(), "lastUpdateBy");
        if (lastUpdateBy != null) {
            ReflectUtil.setFieldValue(parameterObject, lastUpdateBy, LocalUserUtil.getLocalUser().getNickName());
        }
        return invocation.proceed();
    }
}