mybatis报错invalid types () or values ()解决方法

原因： Pojo类User没提供无参数构造方法， 加上该构造方法后，问题解决

### Cause: org.apache.ibatis.reflection.ReflectionException:
Error instantiating class com.chry.browserServer.db.model.User with invalid types () or values ().
cause: java.lang.NoSuchMethodException: com.chry.browserServer.db.model.User.<init>()] with root cause

java.lang.NoSuchMethodException: com.chry.browserServer.db.model.User.<init>()
    at java.lang.Class.getConstructor0(Class.java:) ~[na:1.7.0_67]
    at java.lang.Class.getDeclaredConstructor(Class.java:) ~[na:1.7.0_67]
    at org.apache.ibatis.reflection.factory.DefaultObjectFactory.instantiateClass(DefaultObjectFactory.java:) ~[mybatis-3.2..jar:3.2.]
    at org.apache.ibatis.reflection.factory.DefaultObjectFactory.create(DefaultObjectFactory.java:) ~[mybatis-3.2..jar:3.2.]
    at org.apache.ibatis.reflection.factory.DefaultObjectFactory.create(DefaultObjectFactory.java:) ~[mybatis-3.2..jar:3.2.]
    at org.apache.ibatis.executor.resultset.FastResultSetHandler.createResultObject(FastResultSetHandler.java:) ~[mybatis-3.2..jar:3.2.]
    at org.apache.ibatis.executor.resultset.FastResultSetHandler.createResultObject(FastResultSetHandler.java:) ~[mybatis-3.2..jar:3.2.]
    at org.apache.ibatis.executor.resultset.FastResultSetHandler.getRowValue(FastResultSetHandler.java:) ~[mybatis-3.2..jar:3.2.]
    at org.apache.ibatis.executor.resultset.FastResultSetHandler.handleRowValues(FastResultSetHandler.java:) ~[mybatis-3.2..jar:3.2.]
    at org.apache.ibatis.executor.resultset.FastResultSetHandler.handleResultSet(FastResultSetHandler.java:) ~[mybatis-3.2..jar:3.2.]
    at org.apache.ibatis.executor.resultset.FastResultSetHandler.handleResultSets(FastResultSetHandler.java:) ~[mybatis-3.2..jar:3.2.]
    at org.apache.ibatis.executor.statement.PreparedStatementHandler.query(PreparedStatementHandler.java:) ~[mybatis-3.2..jar:3.2.]
    at org.apache.ibatis.executor.statement.RoutingStatementHandler.query(RoutingStatementHandler.java:) ~[mybatis-3.2..jar:3.2.]
    at org.apache.ibatis.executor.SimpleExecutor.doQuery(SimpleExecutor.java:) ~[mybatis-3.2..jar:3.2.]
    at org.apache.ibatis.executor.BaseExecutor.queryFromDatabase(BaseExecutor.java:) ~[mybatis-3.2..jar:3.2.]
    at org.apache.ibatis.executor.BaseExecutor.query(BaseExecutor.java:) ~[mybatis-3.2..jar:3.2.]
    at org.apache.ibatis.executor.CachingExecutor.query(CachingExecutor.java:) ~[mybatis-3.2..jar:3.2.]
    at org.apache.ibatis.executor.CachingExecutor.query(CachingExecutor.java:) ~[mybatis-3.2..jar:3.2.]
    at org.apache.ibatis.session.defaults.DefaultSqlSession.selectList(DefaultSqlSession.java:) ~[mybatis-3.2..jar:3.2.]
    at org.apache.ibatis.session.defaults.DefaultSqlSession.selectList(DefaultSqlSession.java:) ~[mybatis-3.2..jar:3.2.]
    at org.apache.ibatis.session.defaults.DefaultSqlSession.selectOne(DefaultSqlSession.java:) ~[mybatis-3.2..jar:3.2.]
。。。 。。。。