Mybatis 不支持通配符扫包起别名问题

typeAliasesPackage 默认只能扫描某一个路径下，或以逗号等分割的 几个路径下的内容，不支持通配符和正则，采用重写的方式解决

 

package com.xxxx.xxx.util.common;  
  
import com.xxxx.xxx.util.LogUtil;  
import org.apache.commons.lang3.StringUtils; //注意:不一定非得是lang3包 lang包也可以  
import org.mybatis.spring.SqlSessionFactoryBean;  
import org.slf4j.Logger;  
import org.springframework.core.io.Resource;  
import org.springframework.core.io.support.PathMatchingResourcePatternResolver;  
import org.springframework.core.io.support.ResourcePatternResolver;  
import org.springframework.core.type.classreading.CachingMetadataReaderFactory;  
import org.springframework.core.type.classreading.MetadataReader;  
import org.springframework.core.type.classreading.MetadataReaderFactory;  
import org.springframework.util.ClassUtils;  
  
import java.io.IOException;  
import java.util.ArrayList;  
import java.util.List;  
  

/**
* @ClassName: PackagesSqlSessionFactoryBean
* @Description: mybatis自动扫描别名路径（新增通配符匹配功能）
* @author wzf
* @date 2019年1月21日
*/

public class PackagesSqlSessionFactoryBean extends SqlSessionFactoryBean { // org.mybatis.spring包中的类
  
    static final String DEFAULT_RESOURCE_PATTERN = "**/*.class";  
  
    private static Logger logger = LogUtil.get();  
  
    @Override  
    public void setTypeAliasesPackage(String typeAliasesPackage) {  
        ResourcePatternResolver resolver = (ResourcePatternResolver) new PathMatchingResourcePatternResolver();  
        MetadataReaderFactory metadataReaderFactory = new CachingMetadataReaderFactory(resolver);  
        typeAliasesPackage = ResourcePatternResolver.CLASSPATH_ALL_URL_PREFIX +  
                ClassUtils.convertClassNameToResourcePath(typeAliasesPackage) + "/" + DEFAULT_RESOURCE_PATTERN;  
  
        //将加载多个绝对匹配的所有Resource  
        //将首先通过ClassLoader.getResource("META-INF")加载非模式路径部分  
        //然后进行遍历模式匹配  
        try {  
            List<String> result = new ArrayList<String>();  
            Resource[] resources =  resolver.getResources(typeAliasesPackage);  
            if(resources != null && resources.length > 0){  
                MetadataReader metadataReader = null;  
                for(Resource resource : resources){  
                    if(resource.isReadable()){  
                       metadataReader =  metadataReaderFactory.getMetadataReader(resource);  
                        try {  
                            result.add(Class.forName(metadataReader.getClassMetadata().getClassName()).getPackage().getName());  
                        } catch (ClassNotFoundException e) {  
                            e.printStackTrace();  
                        }  
                    }  
                }  
            }  
            if(result.size() > 0) {  
                super.setTypeAliasesPackage(StringUtils.join(result.toArray(), ","));  
            }else{  
                logger.warn("参数typeAliasesPackage:"+typeAliasesPackage+"，未找到任何包");  
            }  
            //logger.info("d");  
        } catch (IOException e) {  
            e.printStackTrace();  
        }  
    }  
  
}  

然后在spring-mybatis的配置文件中修改
改造前：spring-mybatis.xml配置：绿色为修改前关键部分

<bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">  
    <property name="dataSource" ref="dataSource" />  
    <property name="configLocation" value="classpath:/SqlMapConfig.xml"></property>  
    <property name="mapperLocations" value="classpath*:/sqlmaps/**/*-sql.xml"></property>  
    <property name="typeAliasesPackage" value="com.demo.domain" />  
</bean>  

改造后：spring-mybatis.xml配置：黄色为修改前关键部分

<bean id="sqlSessionFactory" class="com.demo.core.mybatis.PackagesSqlSessionFactoryBean">  
    <property name="dataSource" ref="dataSource" />  
    <property name="configLocation" value="classpath:/SqlMapConfig.xml"></property>  
    <property name="mapperLocations" value="classpath*:/sqlmaps/**/*-sql.xml"></property>

　　 <!--默认别名为对应报下的类名首字母小写 如需自定义可用注解:@Alias("别名") [必须在对应包历使用注解才生效]-->

　　 <property name="typeAliasesPackage" value="com.demo.**.domain" />  

</bean>  

 

 参考自:https://blog.csdn.net/bian1729183741/article/details/52193882