这个错是为什么啊？怎么改啊？？？？

[忍不住去回忆]

下面是报错信息。。。
Exception in thread "main" org.apache.ibatis.exceptions.PersistenceException:
### Error querying database. Cause: org.apache.ibatis.binding.BindingException: Parameter 'tname' not found. Available parameters are [Teacher, Student, param1, param2]
### Cause: org.apache.ibatis.binding.BindingException: Parameter 'tname' not found. Available parameters are [Teacher, Student, param1, param2]
at 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.binding.MapperMethod.executeForMany(MapperMethod.java:137)
at org.apache.ibatis.binding.MapperMethod.execute(MapperMethod.java:75)
at org.apache.ibatis.binding.MapperProxy.invoke(MapperProxy.java:53)
at com.sun.proxy.$Proxy2.findAllStudent(Unknown Source)
at com.stu.test.Test.main(Test.java:21)
Caused by: org.apache.ibatis.binding.BindingException: Parameter 'tname' not found. Available parameters are [Teacher, Student, param1, param2]
at org.apache.ibatis.binding.MapperMethod$ParamMap.get(MapperMethod.java:195)
at org.apache.ibatis.scripting.xmltags.DynamicContext$ContextAccessor.getProperty(DynamicContext.java:115)
at org.apache.ibatis.ognl.OgnlRuntime.getProperty(OgnlRuntime.java:2663)
at org.apache.ibatis.ognl.ASTProperty.getValueBody(ASTProperty.java:114)
at org.apache.ibatis.ognl.SimpleNode.evaluateGetValueBody(SimpleNode.java:212)
at org.apache.ibatis.ognl.SimpleNode.getValue(SimpleNode.java:258)
at org.apache.ibatis.ognl.ASTNotEq.getValueBody(ASTNotEq.java:50)
at org.apache.ibatis.ognl.SimpleNode.evaluateGetValueBody(SimpleNode.java:212)
at org.apache.ibatis.ognl.SimpleNode.getValue(SimpleNode.java:258)
at org.apache.ibatis.ognl.Ognl.getValue(Ognl.java:494)
at org.apache.ibatis.ognl.Ognl.getValue(Ognl.java:458)
at org.apache.ibatis.scripting.xmltags.OgnlCache.getValue(OgnlCache.java:44)
at org.apache.ibatis.scripting.xmltags.ExpressionEvaluator.evaluateBoolean(ExpressionEvaluator.java:32)
at org.apache.ibatis.scripting.xmltags.IfSqlNode.apply(IfSqlNode.java:34)
at org.apache.ibatis.scripting.xmltags.MixedSqlNode.apply(MixedSqlNode.java:33)
at org.apache.ibatis.scripting.xmltags.TrimSqlNode.apply(TrimSqlNode.java:55)
at org.apache.ibatis.scripting.xmltags.MixedSqlNode.apply(MixedSqlNode.java:33)
at org.apache.ibatis.scripting.xmltags.DynamicSqlSource.getBoundSql(DynamicSqlSource.java:41)
at org.apache.ibatis.mapping.MappedStatement.getBoundSql(MappedStatement.java:292)
at org.apache.ibatis.executor.CachingExecutor.query(CachingExecutor.java:81)
at org.apache.ibatis.session.defaults.DefaultSqlSession.selectList(DefaultSqlSession.java:148)
... 6 more

[鱿鱼ing]

Cause: org.apache.ibatis.binding.BindingException: Parameter 'tname' not found. Available parameters are [Teacher, Student, param1, param2] 数据库表 贴出来看看

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[Louis0531]

你传入的参数是两个对象Teacher, Student, 你的tname是哪里来的?

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Exception in thread "main" org.apache.ibatis.exceptions.PersistenceException: ### Error querying database. Cause: org.apache.ibatis.binding.BindingException: Parameter 'tname' not found. Available parameters are [0, 1, param1, param2] ### Cause: org.apache.ibatis.binding.BindingException: Parameter 'tname' not found. Available parameters are [0, 1, param1, param2]

[忍不住去回忆]

tname是Teacher里的啊

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[鱿鱼ing]

Xml后面的tname 全部改成t.tname