MyBatis: $的用法（字符串直接替换）

1. Mapper

@Select("select * from book where id=${id}")
  Book selectBook(@Param("id") int id);
  
  @Select("select * from book where bookName=${yyy}")
  Book selectBook2(@Param("yyy") String yyy);

2.调用

Book book=xingmingMapper.selectBook(1);
    System.out.println(book);
    
    Book book2=xingmingMapper.selectBook2("'cppp'");
    System.out.println(book2);