解决tk mapper 通用mapper的bug问题


Posted in Java/Android onJune 16, 2021

如下所示:

<bean class="tk.mybatis.spring.mapper.MapperScannerConfigurer">
            <property name="basePackage" value="com.isea533.mybatis.mapper"/>
            <property name="properties">
                <value>
                    mappers=tk.mybatis.mapper.common.Mapper
                </value>
            </property>
        </bean>

basePackage的属性值 不能包含通用mapper所在的包

Error starting ApplicationContext. To display the auto-configuration report re-run your application with 'debug' enabled.
2018-03-14 12:39:21.741 ERROR [main] [hio-sys] o.s.boot.SpringApplication - Application startup failed
org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'tk.mybatis.mapper.autoconfigure.MapperAutoConfiguration': Invocation of init method failed; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'baseMapper' defined in file []: Invocation of init method failed; nested exception is tk.mybatis.mapper.MapperException: tk.mybatis.mapper.MapperException: java.lang.ClassCastException: sun.reflect.generics.reflectiveObjects.TypeVariableImpl cannot be cast to java.lang.Class
    at org.springframework.beans.factory.annotation.InitDestroyAnnotationBeanPostProcessor.postProcessBeforeInitialization(InitDestroyAnnotationBeanPostProcessor.java:137)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.applyBeanPostProcessorsBeforeInitialization(AbstractAutowireCapableBeanFactory.java:409)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1620)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:555)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:483)
    at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:306)
    at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:230)
    at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:302)
    at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:197)
    at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:761)
    at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:867)
    at org.springframework.context.support.AbstractApplicationContext.__refresh(AbstractApplicationContext.java:543)
    at org.springframework.context.support.AbstractApplicationContext.jrLockAndRefresh(AbstractApplicationContext.java)
    at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java)
    at org.springframework.boot.context.embedded.EmbeddedWebApplicationContext.refresh(EmbeddedWebApplicationContext.java:122)
    at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:693)
    at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:360)
    at org.springframework.boot.SpringApplication.run(SpringApplication.java:303)
    at com.jzy.hio.HioSysApplication.main(HioSysApplication.java:35)
Caused by: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'baseMapper' defined in file [C:\Users\coffee\OneDrive\workspace\v2r1-hio-base\target\classes\com\jzy\hio\base\mapper\BaseMapper.class]: Invocation of init method failed; nested exception is tk.mybatis.mapper.MapperException: tk.mybatis.mapper.MapperException: java.lang.ClassCastException: sun.reflect.generics.reflectiveObjects.TypeVariableImpl cannot be cast to java.lang.Class
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1628)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:555)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:483)
    at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:306)
    at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:230)
    at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:302)
    at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:202)
    at org.springframework.beans.factory.support.DefaultListableBeanFactory.getBeansOfType_jrOrig(DefaultListableBeanFactory.java:519)
    at org.springframework.beans.factory.support.DefaultListableBeanFactory.getBeansOfType(DefaultListableBeanFactory.java)
    at org.springframework.beans.factory.support.DefaultListableBeanFactory.getBeansOfType_jrOrig(DefaultListableBeanFactory.java:508)
    at org.springframework.beans.factory.support.DefaultListableBeanFactory.getBeansOfType(DefaultListableBeanFactory.java)
    at org.springframework.context.support.AbstractApplicationContext.getBeansOfType(AbstractApplicationContext.java:1188)
    at tk.mybatis.mapper.autoconfigure.MapperAutoConfiguration.addPageInterceptor(MapperAutoConfiguration.java:71)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    at sun.reflect.DelegatingMethodAccessorImpl.__invoke(DelegatingMethodAccessorImpl.java:43)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java)
    at java.lang.reflect.Method.invoke(Method.java:498)
    at org.springframework.beans.factory.annotation.InitDestroyAnnotationBeanPostProcessor$LifecycleElement.invoke(InitDestroyAnnotationBeanPostProcessor.java:366)
    at org.springframework.beans.factory.annotation.InitDestroyAnnotationBeanPostProcessor$LifecycleMetadata.invokeInitMethods(InitDestroyAnnotationBeanPostProcessor.java:311)
    at org.springframework.beans.factory.annotation.InitDestroyAnnotationBeanPostProcessor.postProcessBeforeInitialization(InitDestroyAnnotationBeanPostProcessor.java:134)
    ... 18 common frames omitted
Caused by: tk.mybatis.mapper.MapperException: tk.mybatis.mapper.MapperException: java.lang.ClassCastException: sun.reflect.generics.reflectiveObjects.TypeVariableImpl cannot be cast to java.lang.Class
    at tk.mybatis.mapper.mapperhelper.MapperHelper.setSqlSource(MapperHelper.java:248)
    at tk.mybatis.mapper.mapperhelper.MapperHelper.processConfiguration(MapperHelper.java:311)
    at tk.mybatis.spring.mapper.MapperFactoryBean.checkDaoConfig(MapperFactoryBean.java:54)
    at org.springframework.dao.support.DaoSupport.afterPropertiesSet(DaoSupport.java:44)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.invokeInitMethods(AbstractAutowireCapableBeanFactory.java:1687)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1624)
    ... 39 common frames omitted
Caused by: tk.mybatis.mapper.MapperException: java.lang.ClassCastException: sun.reflect.generics.reflectiveObjects.TypeVariableImpl cannot be cast to java.lang.Class
    at tk.mybatis.mapper.mapperhelper.MapperTemplate.setSqlSource(MapperTemplate.java:258)
    at tk.mybatis.mapper.mapperhelper.MapperHelper.setSqlSource(MapperHelper.java:245)
    ... 44 common frames omitted
Caused by: java.lang.ClassCastException: sun.reflect.generics.reflectiveObjects.TypeVariableImpl cannot be cast to java.lang.Class
    at tk.mybatis.mapper.mapperhelper.MapperTemplate.getEntityClass(MapperTemplate.java:290)
    at tk.mybatis.mapper.provider.base.BaseSelectProvider.selectOne(BaseSelectProvider.java:50)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    at sun.reflect.DelegatingMethodAccessorImpl.__invoke(DelegatingMethodAccessorImpl.java:43)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java)
    at java.lang.reflect.Method.invoke(Method.java:498)
    at tk.mybatis.mapper.mapperhelper.MapperTemplate.setSqlSource(MapperTemplate.java:246)
    ... 45 common frames omitted

(通用mapper)项目升级通用Mapper引发的一连串问题以及问题解决

项目环境

通用Mapper版本

<dependency>
  <groupId>tk.mybatis</groupId>
  <artifactId>mapper-spring-boot-starter</artifactId>
  <version>1.1.5</version>
 </dependency>

Spring boot版本

<parent>
  <groupId>org.springframework.boot</groupId>
  <artifactId>spring-boot-starter-parent</artifactId>
  <version>1.5.9.RELEASE</version>
  <relativePath />
 </parent>

公司统一封装了三个核心包(kemean-aid、kemean-third、kemean-web),平时技术开发都是把三核心包下载源码到本地启动运行,这个星期把三个核心包打包成jar,让项目依赖jar启动,但启动的时候报了一个maven错误(问题一)。

问题一

Caused by: java.lang.LinkageError: loader constraint violation: loader (instance of org/springframework/boot/devtools/restart/classloader/RestartClassLoader) previously initiated loading for a different type with name "tk/mybatis/mapper/common/Mapper"

maven报了一个重复引用通用Mapper Jar错误,但反复查看maven引用,并没有发现有重复引用通用Mapper jar包,而且项目引用源码启动是正常运行的,这个问题着实报得有点诡异!因为经验问题,重复就maven报的这个问题寻找重复引用的jar,然而处理了很久也并没有解决。后来查看通用mapper的版本maven仓库(https://mvnrepository.com/artifact/tk.mybatis/mapper-spring-boot-starter) ,发现公司现在使用的版本已经更新好多个版本了,第一直觉认为是公司用的1.1.5这个版本有问题,于是乎升级了通用mapper版本到2版本(当前最新2.0.4),就这样掉大坑了,开始一系列的问题解决的路程。

<dependency>
     <groupId>tk.mybatis</groupId>
     <artifactId>mapper-spring-boot-starter</artifactId>
     <version>2.0.4</version>
 </dependency>

以下的问题都是在2版本的通用mapper中遇到的

问题二

tk.mybatis.mapper.MapperException: 无法获取实体类com.kemean.bean.KemeanAdminUser对应的表名!

github也有此问题的讨论:https://github.com/abel533/MyBatis-Spring-Boot/issues/18

问题解决

修改启动类@MapperScan注解

2版本的通用Mapper提供了@MapperScan注解,之前我们使用的是org.mybatis.spring.annotation.MapperScan,现需把@MapperScan改为tk.mybatis.spring.annotation.MapperScan

添加spring-devtools.properties文件

在项目src/main/resources目录新建一个文件夹META-INF(项目右键-new-Source Folder),添加热部署配置文件spring-devtools.properties,在文件里面添加restart.include.companycommonlibs=tk/mybatis.*

问题三

tk.mybatis.mapper.MapperException: tk.mybatis.mapper.provider.EmptyProvider中缺少selectOne方法!

github也有此问题的讨论:

https://github.com/abel533/MyBatis-Spring-Boot/issues/92

https://github.com/abel533/MyBatis-Spring-Boot/issues/53

问题解决:把项目热部署去掉

<dependency>
 <groupId>org.springframework.boot</groupId>
 <artifactId>spring-boot-devtools</artifactId>
 <scope>runtime</scope>
</dependency>

在处理完问题二、三,通用Mapper就升级成功了,项目也能够正常启动访问,但是,咱们在处理问题三的时候,把spring boot的热部署给去掉了,这就意味着咱们日后每改动一点,都需要重新启动部署服务,这是士可忍,叔不可忍;叔可忍,婶也不能忍的操作啊。

尝试过好多方式,都不能“升级通用mapper2版本”与“保留Spring boot热部署”两个兼得,后来看到这哥们的一句话,给了我一个提醒,于是乎在刚才添加的spring-devtools.properties文件再补充一行restart.include.companycommonlibs=kemean.*

spring-devtools.properties内容(kemean.*是公司jar的前缀)

restart.include.companycommonlibs=tk/mybatis.*
restart.include.companycommonlibs=kemean.*

https://github.com/abel533/MyBatis-Spring-Boot/issues/53

解决tk mapper 通用mapper的bug问题

再启动服务,服务正常使用,热部署也能够保留

问题一的最终解决

结合问题三的解决思路,那么咱们在不升级通用mapper的前提下,让项目依赖打包出来的jar运行,则仅需在

项目src/main/resources目录新建一个文件夹META-INF(项目右键-new-Source Folder),添加热部署配置文件spring-devtools.properties,在文件里面添加

restart.include.companycommonlibs=kemean.*

问题一就在不升级通用mapper下完美解决了~

以上为个人经验,希望能给大家一个参考,也希望大家多多支持三水点靠木。

Java/Android 相关文章推荐
Win10系统下配置Java环境变量
Jun 13 Java/Android
Spring Data JPA使用JPQL与原生SQL进行查询的操作
Jun 15 Java/Android
Java Optional<Foo>转换成List<Bar>的实例方法
Jun 20 Java/Android
SpringBoot读取Resource下文件的4种方法
Jul 02 Java/Android
Lombok的详细使用及优缺点总结
Jul 15 Java/Android
Java数据开发辅助工具Docker与普通程序使用方法
Sep 15 Java/Android
SpringBoot2零基础到精通之异常处理与web原生组件注入
Mar 22 Java/Android
spring注解 @PropertySource配置数据源全流程
Mar 25 Java/Android
Java 写一个简单的图书管理系统
Apr 26 Java/Android
SpringCloud中分析讲解Feign组件添加请求头有哪些坑梳理
Jun 21 Java/Android
Spring boot实现上传文件到本地服务器
Aug 14 Java/Android
Java获取字符串编码格式实现思路
Sep 23 Java/Android
一篇带你入门Java垃圾回收器
Java实现简易的分词器功能
Java用自带的Image IO给图片添加水印
java Nio使用NioSocket客户端与服务端交互实现方式
JVM入门之类加载与字节码技术(类加载与类的加载器)
Spring Cache和EhCache实现缓存管理方式
浅析NIO系列之TCP
You might like
基于php上传图片重命名的6种解决方法的详细介绍
2013/04/28 PHP
ThinkPHP3.1新特性之Action参数绑定
2014/06/19 PHP
linux下编译安装memcached服务
2014/08/03 PHP
PHP中模拟链表和链表的基本操作示例
2016/02/27 PHP
php使用GD2绘制几何图形示例
2017/02/15 PHP
PHP接口继承及接口多继承原理与实现方法详解
2017/10/18 PHP
一个多次搜索+多次传值的解决方案
2007/01/20 Javascript
jquery利用event.which方法获取键盘输入值的代码
2011/10/09 Javascript
js选取多个或单个元素的实现代码(用class)
2012/08/22 Javascript
js给onclick事件赋值,动态传参数实例解说
2013/03/28 Javascript
jQuery插件实现屏蔽单个元素使用户无法点击
2013/04/12 Javascript
用js实现输入提示(自动完成)的实例代码
2013/06/14 Javascript
js为什么不能正确处理小数运算?
2015/12/29 Javascript
AngularJS中update两次出现$promise属性无法识别的解决方法
2017/01/05 Javascript
利用jQuery实现一个简单的表格上下翻页效果
2017/03/14 Javascript
vue使用v-for实现hover点击效果
2018/09/29 Javascript
详解Angular模板引用变量及其作用域
2018/11/23 Javascript
jQuery实现放大镜案例
2020/10/19 jQuery
深入理解NumPy简明教程---数组3(组合)
2016/12/17 Python
python实现员工管理系统
2018/01/11 Python
Windows下安装Django框架的方法简明教程
2018/03/28 Python
python实现在IDLE中输入多行的方法
2018/04/19 Python
pandas使用apply多列生成一列数据的实例
2018/11/28 Python
Python中栈、队列与优先级队列的实现方法
2019/06/30 Python
python不使用for计算两组、多个矩形两两间的iou方式
2020/01/18 Python
Python面向对象程序设计之私有变量,私有方法原理与用法分析
2020/03/23 Python
Python 如何反方向迭代一个序列
2020/07/28 Python
HTML5组件Canvas实现图像灰度化(步骤+实例效果)
2013/04/22 HTML / CSS
乌克兰第一的珠宝网上商店:Gold.ua
2019/11/29 全球购物
实习生自荐信范文
2013/11/13 职场文书
学校群众路线专项整治方案
2014/10/31 职场文书
学生检讨书范文
2015/01/27 职场文书
员工离职通知函
2015/04/25 职场文书
小时代观后感
2015/06/10 职场文书
酒店厨房管理制度
2015/08/06 职场文书
A22国内电台短波广播频率表
2022/05/10 无线电