spring boot 常见问题

1、整合hibernate

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APPLICATION FAILED TO START
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Description:

Field userRepository in boottest.MainController required a bean of type 'withhibernate.UserRepository' that could not be found.


Action:

Consider defining a bean of type 'withhibernate.UserRepository' in your configuration.

问题描述：根据spring boot官网做些小东西，spring boot使用hibernate与mysql整合时，按照例子做好之后，没问题，当我把User、UserRepository单独放入一个withhibernate包下时，发生这种错误，字面意思就是找不到这个bean，基本定位是scan（扫描）没有找到，判定少注解

解决方式：

在注入方，添加注解扫描

@Controller
@RequestMapping(path="/demo")
@ComponentScan({"withhibernate"})
@EntityScan("withhibernate")
@EnableJpaRepositories("withhibernate")
public class MainController {
    @Autowired
    private UserRepository userRepository;

2、整合mybatis时

controller上面添加@MapperScan ("withmybatis")