Exception in thread "main" org.apache.ibatis.exceptions.PersistenceException:
### Error querying database. Cause: org.apache.ibatis.reflection.ReflectionException:Error instantiating class domain.User with invalid types () or values (). Cause: java.lang.NoSuchMethodException: domain.User.<init>()
### The error may exist in mapper/UserMapper.xml
### The error may involve mapper.UserMapper.selectUser-Inline
### The error occurred while setting parameters
### SQL: SELECT * FROM TB_USER WHERE id=?
### Cause: org.apache.ibatis.reflection.ReflectionException: Error instantiating class domain.User with invalid types () or values (). Cause: java.lang.NoSuchMethodException: domain.User.<init>()
### Error querying database. Cause: org.apache.ibatis.reflection.ReflectionException:Error instantiating class domain.User with invalid types () or values (). Cause: java.lang.NoSuchMethodException: domain.User.<init>()
### The error may exist in mapper/UserMapper.xml
### The error may involve mapper.UserMapper.selectUser-Inline
### The error occurred while setting parameters
### SQL: SELECT * FROM TB_USER WHERE id=?
### Cause: org.apache.ibatis.reflection.ReflectionException: Error instantiating class domain.User with invalid types () or values (). Cause: java.lang.NoSuchMethodException: domain.User.<init>()
at org.apache.ibatis.exceptions.ExceptionFactory.wrapException(ExceptionFactory.java:26)
黑体部分提示的问题在于，你的POJO对象没有空参构造器，一定要申明你的普通对象加入空参构造器
（你需要知道，在JAVA中，如果你设置了有参构造器，默认提供的空参构造器就默认没有了）