處理Mybatis框架的時候，出現下面錯誤時Error querying database. Cause: java.lang.IllegalArgumentException: Mapped Sta

Error querying database. Cause: java.lang.IllegalArgumentException: Mapped Statements collection does not contain value for mapper.UserMapper.selAll ### Cause: java.lang.IllegalArgumentException: Mapped Statements collection does not contain value for mapper.UserMapper.selAll at org.apache.ibatis.exceptions.ExceptionFactory.wrapException(ExceptionFactory.java:26) at org.apache.ibatis.session.defaults.DefaultSqlSession.selectList(DefaultSqlSession.java:111) at org.apache.ibatis.session.defaults.DefaultSqlSession.selectList(DefaultSqlSession.java:102) at org.apache.ibatis.session.defaults.DefaultSqlSession.selectOne(DefaultSqlSession.java:66) at org.apache.ibatis.session.defaults.DefaultSqlSession.selectOne(DefaultSqlSession.java:61) at com.zyq.mapper.impl.UserMapperImpl.selAll(UserMapperImpl.java:27) at test.TestM.main(TestM.java:17) Caused by: java.lang.IllegalArgumentException: Mapped Statements collection does not contain value for mapper.UserMapper.selAll at org.apache.ibatis.session.Configuration$StrictMap.get(Configuration.java:797) at org.apache.ibatis.session.Configuration.getMappedStatement(Configuration.java:631) at org.apache.ibatis.session.Configuration.getMappedStatement(Configuration.java:624) at org.apache.ibatis.session.defaults.DefaultSqlSession.selectList(DefaultSqlSession.java:107) … 5 more## 標題

在處理調用SQL方法時如下面selectOne(“com.zyq.mapper.UserMapper.selAll”);

inputStream=Resources.getResourceAsStream(strxml);
            sqlSessionFactory=new SqlSessionFactoryBuilder().build(inputStream);
            sqlSession=sqlSessionFactory.openSession();
            //一定要寫方法的全類名
            int count=sqlSession.selectOne("com.zyq.mapper.UserMapper.selAll");代碼片
``

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//這里要寫全類名，不能mapper.UserMapper.selAll這樣寫，要把包名com.zyq 寫上，這樣就可以啦com.zyq.mapper.UserMapper.selAll

這里需要在mapper接口中有具體對應的方法，