今天遇到一个问题，原来是mapper.xml文件出了问题,是使用MyBatis最常见的一种错误

报错的结果是这样的：

 A query was run and no Result Maps were found for the Mapped Statement 'cn.zrgk.dao.RoleMapper.getRoleList'.  

　　It's likely that neither a Result Type nor a Result Map was specified.
	
org.apache.ibatis.executor.ExecutorException: A query was run and no Result Maps were found for the Mapped Statement 'cn.zrgk.dao.RoleMapper.getRoleList'. 
　　 It's likely that neither a Result Type nor a Result Map was specified.

    org.apache.ibatis.executor.resultset.FastResultSetHandler.validateResultMapsCount(FastResultSetHandler.java:177)

    org.apache.ibatis.executor.resultset.FastResultSetHandler.handleResultSets(FastResultSetHandler.java:150)

    org.apache.ibatis.executor.statement.PreparedStatementHandler.query(PreparedStatementHandler.java:57)

    org.apache.ibatis.executor.statement.RoutingStatementHandler.query(RoutingStatementHandler.java:70)

    org.apache.ibatis.executor.SimpleExecutor.doQuery(SimpleExecutor.java:57)

    org.apache.ibatis.executor.BaseExecutor.queryFromDatabase(BaseExecutor.java:259)

    org.apache.ibatis.executor.BaseExecutor.query(BaseExecutor.java:132)

    org.apache.ibatis.executor.CachingExecutor.query(CachingExecutor.java:105)

    org.apache.ibatis.executor.CachingExecutor.query(CachingExecutor.java:81)

    sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)

    sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)

    sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)

    java.lang.reflect.Method.invoke(Method.java:606)

我的mapper.xml文件中有个查询语句是这样写的：

　　大家看看图一，好像根本没有错误，对吗？再看看

　　是的，没错，我没有指定这个方法的返回类型，系统无法识别，于是就这样改了一下，发现不报错了

所以平时啊，我们要多多注意这些细节，更要去多加理解

A query was run and no Result Maps were found for...原来是mapper.xml文件出了问题,是使用MyBatis最常见的一种错误的更多相关文章

  1. A query was run and no Result Maps were found for the Mapped Statement 'user.insertUser!selectKey'. It's likely that neither a Result Type nor a Result Map was specified.

    使用mybatis时出现异常问题: 有如下的错误 Error querying database. Cause: org.apache.ibatis.executor.ExecutorExceptio ...

  2. mybatis配置文件xxxx.xml中缺失返回类型的后果A query was run and no Result Maps were found

    使用mybatis时出现异常问题: 有如下的错误 Error querying database.  Cause: org.apache.ibatis.executor.ExecutorExcepti ...

  3. 出错：Cause: org.apache.ibatis.executor.ExecutorException: A query was run and no Result Maps were found for the Mapped Statement 'cn.mgy.mapper.UserMapper.findById'.

    详细出错代码: org.apache.ibatis.exceptions.PersistenceException: ### Error querying database. Cause: org.a ...

  4. A query was run and no Result Maps were found for the Mapped Statement

    mybatis测试方法报错: org.mybatis.spring.MyBatisSystemException: nested exception is org.apache.ibatis.exec ...

  5. mybatis使用map传递多参数报错：A query was run and no Result Maps were found for the Mapped Statement

    在使用mybatis进行多参数传递时,报错: A query was run and no Result Maps were found for the Mapped Statement 'xx.xx ...

  6. ExecutorException: A query was run and no Result Maps were found for the Mapped Statement ‘com.win.mall.dao.CartMapper.test’. It’s likely that neither a Result Type nor a Result Map was specified.

    ExecutorException: A query was run and no Result Maps were found for the Mapped Statement 'com.win.m ...

  7. mybatis报错：A query was run and no Result Maps were found for the Mapped Statement、、Property [login_ip] not found on type [com.thinkgem.jeesite.common.permission.entity.PremissUser]问题解决

    今天在做ssm项目的时候出现了: 先是出现 了错误: mybatis报错:A query was run and no Result Maps were found for the Mapped St ...

  8. mybatis报错：A query was run and no Result Maps were found for the Mapped Statement

    转自:https://blog.csdn.net/u013399093/article/details/53087469 今天编辑mybatis的xml文件,出现如下错误: 程序出现异常[A quer ...

  9. mybatis mapper xml文件配置resultmap时，id行和result行有什么区别？

    mybatis mapper xml文件配置resultmap时,id行和result行有什么区别? <resultMap id = "CashInvoiceMap" typ ...

随机推荐

  1. 【译】优雅的停止docker容器

    1. 介绍 Docker的大部分重点是在隔离的容器中打包和运行应用程序的过程.有无数的教程说明了如何在Docker容器中运行应用程序,但是很少有教程讨论如何正确停止容器化的应用程序.这似乎是一个愚蠢的 ...

  2. Linux学习—mysql安装配置及远程连接

    安装前准备 1.检查是否已经安装过mysql 执行命令 [root@localhost /]# rpm -qa | grep mysql  从执行结果,可以看出我们已经安装了mysql-libs-5. ...

  3. 使用robotframework做接口测试5——一个用例中调多个接口

    凡是涉及一点点有接口关联的,都可能下一个接口需要上一个接口的某个返回值作为入参,最直接的例子,就是登录依赖.用接口做业务性的测试,也绝对离不开接口依赖的,业务都是一系列接口串联的结果,有时候一个接口操 ...

  4. docker MySQL官方版本使用记录

    docker MySQL官方版本使用记录 使用记录 拉取官方镜像:docker pull mysql 运行镜像:docker run --name mysql -p 3306:3306 -e MYSQ ...

  5. python3 速查参考- python基础 9 -> MySQL基础概念、数据库create、alter、insert、update、delete、select等基础命令

    前置步骤: 下载一个绿色版的mysql数据库客户端连接工具 :http://wosn.net/821.html mysql平台为win7(以后会有CentOS上的) 学习目的: 掌握数据库的基本概念, ...

  6. Django组件-admin

    一. admin组件的使用 Django 提供了基于 web 的管理工具. Django 自动管理工具是 django.contrib 的一部分.你可以在项目的 settings.py 中的 INST ...

  7. dockerfile文件命令详解

    Dockerfile 一般分为四部分:基础镜像信息.维护者信息.镜像操作指令和容器启动时执行指令,’#’ 为 Dockerfile 中的注释: Dockerfile的指令根据作用可以分为两种:构建指令 ...

  8. 安装heat

    在控制节点上执行 controller-heat(){mysql -uroot -p${MYSQL_PASSWD} << EOF DROP DATABASE IF EXISTS heat; ...

  9. 【VS开发】【计算机视觉】OpenCV读写xml文件《C++版本》

    OpenCV FileStorage类读写XML/YML文件 在OpenCV程序中,需要保存中间结果的时候常常会使用.xml / .yml文件,opencv2.0之前都是使用C风格的代码,当时读写XM ...

  10. python之函数形参、实参、可变长参数整体使用和分类

    形参与实参 '''def fn(形参们): pass fn(实参们)'''# 形参:定义函数,在括号内声明的变量名,用来结束外界传来的值# 实参:调用函数,在括号内传入的实际值,值可以为常量.变量.表 ...