org.apache.ibatis.exceptions.PersistenceException: 

### Error querying database.  Cause: com.mysql.jdbc.exceptions.jdbc4.MySQLSyntaxErrorException: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 't_goods g, t_category c

        where g.category_id=c.category_id' at line 1

### The error may exist in mappers/goods.xml

### The error may involve defaultParameterMap

### The error occurred while setting parameters

### SQL: select g.* , c.category_name form t_goods g, t_category c         where g.category_id=c.category_id

### Cause: com.mysql.jdbc.exceptions.jdbc4.MySQLSyntaxErrorException: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 't_goods g, t_category c

        where g.category_id=c.category_id' at line 1

上面时报错信息

<select id="selectGoodsMap" resultType="java.util.Map">
   select g.* , c.category_name form t_goods g, t_category c
   where g.category_id=c.category_id
</select>

这是查询语句代码，用的老师视频里面的

@Test
public void testSelectGoodsMap() throws Exception {
   SqlSession session=null;
   try{
       session=MyBatisUtils.openSession();
       List<Map> list=session.selectList("goods.selectGoodsMap");
       for (Map map:list){
           System.out.println(map);
       }
   }catch (Exception e){
       throw e;
   }finally {
       MyBatisUtils.closeSession(session);
   }
}

这是测试用例的代码，另外确认了数据库连接是对的，表用的源代码导入的，表里面字段category_id也是对的