mybaits spring boot 嵌套jar包中的@mapper 扫描不到

Question

dao项目里是可以的，dao.jar被别的项目引用，就扫描不到

日志如下:

main] o.m.s.mapper.ClassPathMapperScanner      : No MyBatis mapper was found in '[com.zhangjian.cache]' package. Please check your configuration.

application.yml

spring:
  datasource:
    type: com.mysql.jdbc.jdbc2.optional.MysqlDataSource
    url: jdbc:mysql://192.168.56.4:3306/mytest
    username: test
    password: test
    driver-class-name: com.mysql.jdbc.Driver
#    schema: classpath:import.sql
mybatis:
  mapper-locations: classpath*:database/mappers/*.xml
  type-aliases-package: com.zhangjian.entity
#  config-location: classpath:database/mybatis-config.xml
#  typeHandlersPackage:
#  check-config-location:
#  executorType:
#logging:
#  level:
#    root: WARN
#    com.zhangjian.dao: TRACE

DemoDao.java:

package com.zhangjian.dao;

import com.zhangjian.entity.DemoEntity;
import org.apache.ibatis.annotations.Mapper;
import org.springframework.stereotype.Repository;

/**
 * Created by zhangjian on 2017/5/21.
 */
@Mapper
public interface DemoDao extends BaseDao<DemoEntity>{
}

demoMapper.xml:

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN"
        "http://mybatis.org/dtd/mybatis-3-mapper.dtd">
<mapper namespace="com.zhangjian.dao.DemoDao">
。。。。。

Answer 1

启动类加注解 @MapperScan(basePackages = "com.zhangjian.dao")

Answer 2

配置有问题，可以把配置贴出来

Answer 3

我也遇到同的问题，一模一样，不知道楼主解决没有，如果解决，望回复一下

Answer 4

service层加@AutoWired或@@Resourcele了吗？

Answer 5

遇到同样的问题，还是没有解决，请问楼主现在解决了吗，能给点建议吗？

Answer 6

这个好像是mybatis+spring boot的一个bug
https://www.jianshu.com/p/63f... 有一个解决方案

Answer 7

我目前用的是2.2.2的starter。可以关注一下这个配置org.mybatis.spring.boot.autoconfigure.MybatisAutoConfiguration.MapperScannerRegistrarNotFoundConfiguration。其中代码为

  @org.springframework.context.annotation.Configuration
  @Import(AutoConfiguredMapperScannerRegistrar.class)
  @ConditionalOnMissingBean({ MapperFactoryBean.class, MapperScannerConfigurer.class })
  public static class MapperScannerRegistrarNotFoundConfiguration implements InitializingBean {

    @Override
    public void afterPropertiesSet() {
      logger.debug(
          "Not found configuration for registering mapper bean using @MapperScan, MapperFactoryBean and MapperScannerConfigurer.");
    }

  }

大概意思只要有了MapperFactoryBean.class, MapperScannerConfigurer.class这两个bean，那么就不会 @Import(AutoConfiguredMapperScannerRegistrar.class).其中AutoConfiguredMapperScannerRegistrar刚好就是注册扫描@Mapper的相关内容。

但是想要没有MapperFactoryBean.class, MapperScannerConfigurer.class这两个bean好像不可能。不过我发现在2.0.1的starter中的代码写法就不一样了。