mybatis报错：java.lang.IllegalArgumentException: Mapped Statements collection does not contain

在做mybatis案例的时候发现了一个问题，报错如下：

org.apache.ibatis.exceptions.PersistenceException:
### Error querying database. Cause: java.lang.IllegalArgumentException: Mapped Statements collection does not contain value for org.dao.UserMapper.count
### Cause: java.lang.IllegalArgumentException: Mapped Statements collection does not contain value for org.dao.UserMapper.count
   at org.apache.ibatis.exceptions.ExceptionFactory.wrapException(ExceptionFactory.java:23)
   at org.apache.ibatis.session.defaults.DefaultSqlSession.selectList(DefaultSqlSession.java:107)
   at org.apache.ibatis.session.defaults.DefaultSqlSession.selectList(DefaultSqlSession.java:98)
   at org.apache.ibatis.session.defaults.DefaultSqlSession.selectOne(DefaultSqlSession.java:62)
   at org.apache.ibatis.session.defaults.DefaultSqlSession.selectOne(DefaultSqlSession.java:57)
   at org.test.UserMapperTest.test(UserMapperTest.java:55)
   at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
   at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
   at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
   at java.lang.reflect.Method.invoke(Method.java:606)
   at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:44)
   at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:15)
   at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:41)
   at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:20)
   at org.junit.internal.runners.statements.RunBefores.evaluate(RunBefores.java:28)
   at org.junit.runners.BlockJUnit4ClassRunner.runNotIgnored(BlockJUnit4ClassRunner.java:79)
   at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:71)
   at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:49)
   at org.junit.runners.ParentRunner$3.run(ParentRunner.java:193)
   at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:52)
   at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:191)
   at org.junit.runners.ParentRunner.access$000(ParentRunner.java:42)
   at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:184)
   at org.junit.runners.ParentRunner.run(ParentRunner.java:236)
   at org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.run(JUnit4TestReference.java:50)
   at org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:38)
   at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:467)
   at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:683)
   at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:390)
   at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:197)
Caused by: java.lang.IllegalArgumentException: Mapped Statements collection does not contain value for org.dao.UserMapper.count
   at org.apache.ibatis.session.Configuration$StrictMap.get(Configuration.java:775)
   at org.apache.ibatis.session.Configuration.getMappedStatement(Configuration.java:615)
   at org.apache.ibatis.session.Configuration.getMappedStatement(Configuration.java:608)
   at org.apache.ibatis.session.defaults.DefaultSqlSession.selectList(DefaultSqlSession.java:103)
   ... 28 more

首先一看到错，对于英语不好的我来说，脑海里瞬间闪过一句话：TMD，这是什么鬼东西。。。然后仔细的看了看，看到了个关键字collection ，于是想想是不是没有连接上数据库，错误原因要么在数据库资源文件里面，要么就在UserMapper.xml里面。回去看了看资源文件：

driver=com.mysql.jdbc.Driver
url=jdbc\:mysql\://localhost\:3306/smbms?useUnicode\=true&characterEncoding\=utf-8
user=root
password=123

没毛病，那就是在UserMapper.xml里面，于是跳转到UserMapper.xml里面看了看，还真在这里面，注意看下面的内容

<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE mapper
PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN"
"http://mybatis.org/dtd/mybatis-3-mapper.dtd"><mapper namespace="org.dao.UserMapper.xml"><!-- 查询用户表的记录数 --><select id="count" resultType="int">select count(*) from user</select>
</mapper>

注意看着一行代码：

<mapper namespace="org.dao.UserMapper.xml">

我迷糊的居然在后面加了个.xml,于是乎把它去掉就可以了！，正确的映射文件如下：

<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE mapper
PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN"
"http://mybatis.org/dtd/mybatis-3-mapper.dtd"><mapper namespace="org.dao.UserMapper"><!-- 查询用户表的记录数 --><select id="count" resultType="int">select count(*) from user</select>
</mapper>

问题完美解决！

mybatis报错：java.lang.IllegalArgumentException: Mapped Statements collection does not contain相关推荐

报错java.lang.IllegalArgumentException: Result Maps collection does not contain value解决
使用mybatis报错 java.lang.IllegalArgumentException: Result Maps collection does not contain value for co ...
Caused by: java.lang.IllegalArgumentException: Mapped Statements collection already contains valu...
在使用mybatis的时候遇到这个问题报错信息 Caused by: java.lang.IllegalArgumentException: Mapped Statements collection ...
java.lang.IllegalArgumentException: Mapped Statements collection already contains value for ...
java.lang.IllegalArgumentException: Mapped Statements collection already contains value for: 这个一般是参数 ...
java.lang.IllegalArgumentException: Mapped Statements collection does not contain value for com.stud
最近使用Mybatis报了如下错误: org.apache.ibatis.exceptions.PersistenceException: ### Error querying database. C ...
Cause java lang IllegalArgumentException Mapped Statements
分享一下我老师大神的人工智能教程!零基础,通俗易懂!http://blog.csdn.net/jiangjunshow 也欢迎大家转载本篇文章.分享知识,造福人民,实现我们中华民族伟大复兴! 1.错误 ...
Cookie报错java.lang.IllegalArgumentException
项目中做自动登录和保存密码时,Cookie报错Java.lang.IllegalArgumentException,上google查了下在http://hi.baidu.com/xtxycy/blo ...
客户端启动报错java.lang.IllegalArgumentException: no server available的解决方案 SpringCloud中 Nacos做注册中心
客户端启动报错java.lang.IllegalArgumentException: no server available的解决方案 SpringCloud中 Nacos做注册中心(谷粒) 报错内容 ...
myeclipse 修改项目名Tomcat启动项目报错java.lang.IllegalArgumentException: Can't convert argument: null...
一.Tomcat启动报错: 有时候我们会避免项目重名,在导入项目时会修改项目名称. 修改项目名称后启动该项目至tomcat,报错:java.lang.IllegalArgumentException: ...
报错: java.lang.IllegalArgumentException: mapper [categoryName] of different type, current_type [text]
Elasticsearch报错: 非法参数异常 Caused by: java.lang.IllegalArgumentException: mapper [categoryName] of diff ...

mybatis报错：java.lang.IllegalArgumentException: Mapped Statements collection does not contain

mybatis报错：java.lang.IllegalArgumentException: Mapped Statements collection does not contain相关推荐

最新文章

热门文章