public class BookService {
  //注入dao
    @Autowired
    private BookDao bookDao;
  //修改的方法
    public void update(Book book){
        bookDao.updateBook(book);
    }
}

public interface BookDao {
  //修改的方法
    void updateBook(Book book);
}

@Repository
public class BookDaoImpl implements  BookDao{
    //注入jdbcTemplate
    @Autowired
    private JdbcTemplate jdbcTemplate;
    //修改的方法
    @Override
    public void updateBook(Book book) {
        String sql = "update t_book set username=?,ustatus=? where user_id=?";
        Object[] args = {book.getUsername(),book.getUstatus(),book.getUserId()};
        int update = jdbcTemplate.update(sql,args);
        System.out.println(update);
    }
 }

public class BookService {
  //注入dao
    @Autowired
    private BookDao bookDao;
  //批量修改
    public void batchUpdate(List<Object[]> batchArgs){
        bookDao.batchUpdateBook(batchArgs);
    }
}

public interface BookDao {
  //批量修改
    void batchUpdateBook(List<Object[]> batchArgs);
}

@Repository
public class BookDaoImpl implements  BookDao{
    //注入jdbcTemplate
    @Autowired
    private JdbcTemplate jdbcTemplate;
   //批量修改
    @Override
    public void batchUpdateBook(List<Object[]> batchArgs) {
        String sql = "update t_book set username=?,ustatus=? where user_id=?";
        int[] ints = jdbcTemplate.batchUpdate(sql,batchArgs);
        System.out.println(Arrays.toString(ints));
    }
 }

public class BookService {
  //注入dao
    @Autowired
    private BookDao bookDao;
    //查询表记录数
    public int findCount(){
       return bookDao.selectCount();
    }
}

public interface BookDao {
  //查询表记录数
    int selectCount();
}

@Repository
public class BookDaoImpl implements  BookDao{
    //注入jdbcTemplate
    @Autowired
    private JdbcTemplate jdbcTemplate;
    //查询表记录数
    @Override
    public int selectCount() {
        String sql = "select count(*) from t_book";
       Integer count =  jdbcTemplate.queryForObject(sql,Integer.class);
        return count;
    }
 }

public class BookService {
  //注入dao
    @Autowired
    private BookDao bookDao;
    //查询返回对象
    public Book findOne(String id){
        return bookDao.findBookInfo(id);
    }
}

public interface BookDao {
    //查询返回对象
    Book findBookInfo(String id);
}

@Repository
public class BookDaoImpl implements  BookDao{
    //注入jdbcTemplate
    @Autowired
    private JdbcTemplate jdbcTemplate;
        //查询返回对象
    @Override
    public Book findBookInfo(String id) {
        String sql = "select * from t_book where user_id=?";
        //调用方法
        Book book = jdbcTemplate.queryForObject(sql,new BeanPropertyRowMapper<Book>(Book.class),id);
        return book;
    }
 }

public class BookService {
  //注入dao
    @Autowired
    private BookDao bookDao;
    //查询返回集合
    public List<Book> findAll(){
        return bookDao.findAllBook();
    }
}

public interface BookDao {
   //查询返回集合
    List<Book> findAllBook();
}

@Repository
public class BookDaoImpl implements  BookDao{
    //注入jdbcTemplate
    @Autowired
    private JdbcTemplate jdbcTemplate;
    //查询返回集合
    @Override
    public List<Book> findAllBook() {
        String sql = "select * from t_book";
        List<Book> bookList = jdbcTemplate.query(sql, new BeanPropertyRowMapper<Book>(Book.class));
        return bookList;
    }
 }