还是报错

Question

Servlet.service() for servlet [dispatcherServlet] in context with path [/business] threw exception [Request processing failed; nested exception is java.lang.ClassCastException: com.course.server.dto.ChapterDto cannot be cast to com.course.server.domain.Chapter] with root cause
java.lang.ClassCastException: com.course.server.dto.ChapterDto cannot be cast to com.course.server.domain.Chapter
at com.course.server.service.ChapterService.list(ChapterService.java:30)
at com.course.business.controller.admin.ChapterController.chapter(ChapterController.java:20)

Answer 1

甲蛙 2021-08-04 18:01:44

30行： Chapter chapter=chapterList.get(i); 这行报错没啥道理，看不出来问题。

ChapterMapper.xml和ChapterMapper.java这两个文件是生成器生成的，没动过吧。截图看下你的ChapterMapper.xml

Answer 2

甲蛙 2021-08-03 16:56:21

这个30行是哪一行呢？会不会是Maven缓存，试试Maven clean下

• 提问者 慕标9206503 #1

  30行： Chapter chapter=chapterList.get(i);
  20行：       return chapterService.list();
  还是不行，报的转换类型错误ClassCastException: com.course.server.dto.ChapterDto cannot be cast to com.course.server.domain.Chapter