source is null for getProperty(null, "parentId")
2018-02-17 22:01
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其根本原因还是我们常见的：java.lang.NullPointerException只不过该异常被Mybatils封装了，就像Spring把常见的SqlException封装成org.springframework.dao.XXXException一样，解决方法如下：
1.第一种办法在实体类中把对象New出来public class Report{
private String reportId;
private String videoId;
private Video video=new Video();
} 2.在mybatis中的sql语句进行逐层判断
①. 错误的写法
②. 正确的写法
1.第一种办法在实体类中把对象New出来public class Report{
private String reportId;
private String videoId;
private Video video=new Video();
} 2.在mybatis中的sql语句进行逐层判断
①. 错误的写法
②. 正确的写法
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