一:問題描述

1:前言

無論你是將mapper.xml文件是和resources建造在一塊，還是將mapper.xml文件和mapper放在一塊,我們只要修改在yaml當中的mapper-locations的相對路徑即可。（前提是你在pom文件中導入了相關的resources路徑）

2:下方是將mapper.xml和mapper寫在了一塊

3:mapper.xml在resources路徑下

4:需要在pom中導入的resources路徑

<resources><resource><directory>src/main/java</directory><includes><include>**/*.xml</include></includes><filtering>true</filtering></resource><resource><directory>src/main/resources</directory></resource><resource><directory>src/main/resources</directory><includes><include>**/*.yaml</include><include>**/*.xml</include><include>**/*.properties</include></includes><filtering>true</filtering></resource> </resources>

二:整合小demo過程

(1):導入場景啟動器

org.mybatis.spring.boot mybatis-spring-boot-starter 2.1.4 ## (2):寫全局配置文件 在reources路徑下  <?xml version="1.0" encoding="UTF-8" ?> <!DOCTYPE configurationPUBLIC "-//mybatis.org//DTD Config 3.0//EN""http://mybatis.org/dtd/mybatis-3-config.dtd"> <configuration> <!--方便在mapper.xml中全限定名的簡寫--> <typeAliases><typeAlias alias="TextUser" type="com.wyj.Pojo.TextUser"/> </typeAliases></configuration>

(3):寫mapper接口

注意我們的注解@mapper 相當于將其注入到IOC容器中 package com.wyj.mapper;import com.wyj.Pojo.TextUser; import org.apache.ibatis.annotations.Mapper;@Mapper public interface TextUserMapper {TextUser getUser(int id); }

(4):mapper.xml

<?xml version="1.0" encoding="UTF-8" ?> <!DOCTYPE mapperPUBLIC "-//mybatis.org//DTD Mapper 3.0//EN""http://mybatis.org/dtd/mybatis-3-mapper.dtd"> <mapper namespace="com.wyj.mapper.TextUserMapper"><select id="getUser" resultType="TextUser" parameterType="_int">select * from text where id = #{id}</select></mapper>

(5):service層

package com.wyj.Service;import com.wyj.mapper.TextUserMapper; import com.wyj.Pojo.TextUser; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.stereotype.Service;@Service public class TextUserService {@Autowiredprivate TextUserMapper textUserMapper;public TextUser getUser(int id) {return textUserMapper.getUser(id);} }

(6):Controller層

@Autowired private TextUserService textUserService;@ResponseBody @RequestMapping("/text") public TextUser getUser(Integer id){return textUserService.getUser(id);}

(7):yaml配置文件

#Mybatis配置
mybatis:
#全局配置文件的路徑
config-location: classpath:mybatis/mybatis-config.xml
#指明.xml文件的路徑
mapper-locations: classpath:com/wyj/mapper/*.xml

(8):在pom文件中需要引入的resources路徑

<resources><resource><directory>src/main/java</directory><includes><include>**/*.xml</include></includes><filtering>true</filtering></resource><resource><directory>src/main/resources</directory></resource><resource><directory>src/main/resources</directory><includes><include>**/*.yaml</include><include>**/*.xml</include><include>**/*.properties</include></includes><filtering>true</filtering></resource> </resources> 創作挑戰賽新人創作獎勵來咯，堅持創作打卡瓜分現金大獎

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