文章目录
前言:我们在平常工作中用到mybatis去加载Mapper.xml文件,可能mapper文件放的路径不一样,由此我们需要配置多个路径,幸运的是Mybatis支持我们配置多个不同路径。现在介绍两种方法。
一、配置文件方式
SpringBoot和Mybatis整合已经天然支持这种方式,只需要在配置文件添加多个路径用逗号隔开。
mybatis:
mapper-locations: classpath*:com/pab/cc/fas/mapper/*Mapper*.xml,classpath*:com/pab/cc/ces/mapper/*Mapper*.xml,classpath*:com/pab/cc/ams/mapper/*Mapper*.xml
type-aliases-package: com.urthink.upfs.springbootmybatis.entity
#IDENTITY: MYSQL #取回主键的方式
#notEmpty: false #insert和update中,是否判断字符串类型!=''
configuration:
#进行自动映射时,数据以下划线命名,如数据库返回的"order_address"命名字段是否映射为class的"orderAddress"字段。默认为false
map-underscore-to-camel-case: true
# 输出SQL执行语句 (log4j2本身可以输出sql语句)
二、Javabean配置
主要用到的是SqlSessionFactoryBean的setMapperLocations(),这个方法需要传入resource数组。
public SqlSessionFactory sqlSessionFactory() {
SqlSessionFactoryBean sqlSessionFactoryBean = new SqlSessionFactoryBean();
sqlSessionFactoryBean.setDataSource(dataSourceOne());
sqlSessionFactoryBean.setMapperLocations(resolveMapperLocations());
return sqlSessionFactoryBean.getObject();
}
public Resource[] resolveMapperLocations() {
ResourcePatternResolver resourceResolver = new PathMatchingResourcePatternResolver();
List<String> mapperLocations = new ArrayList<>();
mapperLocations.add("classpath*:com/pab/cc/fas/mapper/*Mapper*.xml");
mapperLocations.add("classpath*:com/pab/cc/ces/mapper/*Mapper*.xml");
mapperLocations.add("classpath*:com/pab/cc/ams/mapper/*Mapper*.xml");
List<Resource> resources = new ArrayList();
if (mapperLocations != null) {
for (String mapperLocation : mapperLocations) {
try {
Resource[] mappers = resourceResolver.getResources(mapperLocation);
resources.addAll(Arrays.asList(mappers));
} catch (IOException e) {
// ignore
}
}
}
return resources.toArray(new Resource[resources.size()]);
}