mybatis 查询用户总个数时
报错

org.apache.ibatis.exceptions.PersistenceException: 
### Error querying database.  Cause: com.mysql.jdbc.exceptions.jdbc4.MySQLSyntaxErrorException: FUNCTION eesy_mybatis.count does not exist. Check the 'Function Name Parsing and Resolution' section in the Reference Manual
### The error may exist in com/itheima/dao/IUserDao.xml
### The error may involve defaultParameterMap
### The error occurred while setting parameters
### SQL: SELECT count (id) FROM user
### Cause: com.mysql.jdbc.exceptions.jdbc4.MySQLSyntaxErrorException: FUNCTION eesy_mybatis.count does not exist. Check the 'Function Name Parsing and Resolution' section in the Reference Manualat org.apache.ibatis.exceptions.ExceptionFactory.wrapException(ExceptionFactory.java:30)at org.apache.ibatis.session.defaults.DefaultSqlSession.selectList(DefaultSqlSession.java:150)at org.apache.ibatis.session.defaults.DefaultSqlSession.selectList(DefaultSqlSession.java:141)at org.apache.ibatis.session.defaults.DefaultSqlSession.selectOne(DefaultSqlSession.java:77)at org.apache.ibatis.binding.MapperMethod.execute(MapperMethod.java:82)at org.apache.ibatis.binding.MapperProxy.invoke(MapperProxy.java:59)at com.sun.proxy.$Proxy5.findUserCount(Unknown Source)at com.itheima.test.mybatis.testFindUserCount(mybatis.java:131)at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:45)at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:15)at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:42)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.internal.runners.statements.RunAfters.evaluate(RunAfters.java:30)at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:263)at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:68)at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:47)at org.junit.runners.ParentRunner$3.run(ParentRunner.java:231)at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:60)at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:229)at org.junit.runners.ParentRunner.access$000(ParentRunner.java:50)at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:222)at org.junit.runners.ParentRunner.run(ParentRunner.java:300)at org.junit.runner.JUnitCore.run(JUnitCore.java:157)at com.intellij.junit4.JUnit4IdeaTestRunner.startRunnerWithArgs(JUnit4IdeaTestRunner.java:74)at com.intellij.rt.execution.junit.JUnitStarter.prepareStreamsAndStart(JUnitStarter.java:211)at com.intellij.rt.execution.junit.JUnitStarter.main(JUnitStarter.java:67)at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)at com.intellij.rt.execution.application.AppMain.main(AppMain.java:134)
Caused by: com.mysql.jdbc.exceptions.jdbc4.MySQLSyntaxErrorException: FUNCTION eesy_mybatis.count does not exist. Check the 'Function Name Parsing and Resolution' section in the Reference Manualat sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)at java.lang.reflect.Constructor.newInstance(Constructor.java:423)at com.mysql.jdbc.Util.handleNewInstance(Util.java:406)at com.mysql.jdbc.Util.getInstance(Util.java:381)at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:1030)at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:956)at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:3491)at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:3423)at com.mysql.jdbc.MysqlIO.sendCommand(MysqlIO.java:1936)at com.mysql.jdbc.MysqlIO.sqlQueryDirect(MysqlIO.java:2060)at com.mysql.jdbc.ConnectionImpl.execSQL(ConnectionImpl.java:2542)at com.mysql.jdbc.PreparedStatement.executeInternal(PreparedStatement.java:1734)at com.mysql.jdbc.PreparedStatement.execute(PreparedStatement.java:995)at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)at org.apache.ibatis.logging.jdbc.PreparedStatementLogger.invoke(PreparedStatementLogger.java:59)at com.sun.proxy.$Proxy7.execute(Unknown Source)at org.apache.ibatis.executor.statement.PreparedStatementHandler.query(PreparedStatementHandler.java:63)at org.apache.ibatis.executor.statement.RoutingStatementHandler.query(RoutingStatementHandler.java:79)at org.apache.ibatis.executor.SimpleExecutor.doQuery(SimpleExecutor.java:63)at org.apache.ibatis.executor.BaseExecutor.queryFromDatabase(BaseExecutor.java:324)at org.apache.ibatis.executor.BaseExecutor.query(BaseExecutor.java:156)at org.apache.ibatis.executor.CachingExecutor.query(CachingExecutor.java:109)at org.apache.ibatis.executor.CachingExecutor.query(CachingExecutor.java:83)at org.apache.ibatis.session.defaults.DefaultSqlSession.selectList(DefaultSqlSession.java:148)... 34 more

原因：：：

SELECT COUNT (id) FROM user

在SQL语句中 COUNT (id) count与（id）之间存在空格，去掉空格！！！！
即：

<select id="findUserCount" resultType="int">SELECT COUNT(id) FROM user</select>

解决！！