@ConfigurationProperties(prefix = MybatisProperties.MYBATIS_PREFIX)
public class MybatisProperties {  

  /**
   * Packages to search type aliases. (Package delimiters are ",; 	
")
   */
  private String typeAliasesPackage;

mybatis:
	typeAliasesPackage: com.example.system.domain,com.example.common.domain

mybatis:
	# 規(guī)則是，新加的包的名字必須是 com.example.xxx.domain
	typeAliasesPackage: com.example.**.domain

import java.io.IOException;
import java.util.ArrayList;
import java.util.HashSet;
import java.util.List;
import javax.sql.DataSource;

import org.apache.ibatis.io.VFS;
import org.apache.ibatis.session.SqlSessionFactory;
import org.mybatis.spring.SqlSessionFactoryBean;
import org.mybatis.spring.boot.autoconfigure.SpringBootVFS;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.core.env.Environment;
import org.springframework.core.io.DefaultResourceLoader;
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;

/**
 * Mybatis支持*匹配掃描包
 *
 * @author ruoyi
 */
@Configuration
public class MyBatisConfig {
    @Autowired
    private Environment env;

    static final String DEFAULT_RESOURCE_PATTERN = "**/*.class";

    /**
     * 自定義typeAliasesPackage
     * 在application.yml中typeAliasesPackage的值等于com.ruoyi.**.domain
     * 但是mybatis是無法識別**通配符的
     * 需要我們自己實(shí)現(xiàn)通過**通配符匹配到所有的domain包
     *
     * @param typeAliasesPackage
     * @return
     */
    public static String setTypeAliasesPackage(String typeAliasesPackage) {
        ResourcePatternResolver resolver = (ResourcePatternResolver) new PathMatchingResourcePatternResolver();
        MetadataReaderFactory metadataReaderFactory = new CachingMetadataReaderFactory(resolver);
        List<String> allResult = new ArrayList<String>();
        try {
            for (String aliasesPackage : typeAliasesPackage.split(",")) {
                List<String> result = new ArrayList<String>();
                aliasesPackage = ResourcePatternResolver.CLASSPATH_ALL_URL_PREFIX
                        + ClassUtils.convertClassNameToResourcePath(aliasesPackage.trim()) + "/" + DEFAULT_RESOURCE_PATTERN;
                Resource[] resources = resolver.getResources(aliasesPackage);
                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) {
                    HashSet<String> hashResult = new HashSet<String>(result);
                    allResult.addAll(hashResult);
                }
            }
            if (allResult.size() > 0) {
                typeAliasesPackage = String.join(",", (String[]) allResult.toArray(new String[0]));
            } else {
                throw new RuntimeException("mybatis typeAliasesPackage 路徑掃描錯(cuò)誤,參數(shù)typeAliasesPackage:" + typeAliasesPackage + "未找到任何包");
            }
        } catch (IOException e) {
            e.printStackTrace();
        }
        return typeAliasesPackage;
    }

    @Bean
    public SqlSessionFactory sqlSessionFactory(DataSource dataSource) throws Exception {
        // 獲取配置文件中定義的 mybatis.typeAliasesPackage 的值
        String typeAliasesPackage = env.getProperty("mybatis.typeAliasesPackage");
        // 獲取配置文件中定義的 mybatis.mapperLocations 的值
        String mapperLocations = env.getProperty("mybatis.mapperLocations");
        // 獲取配置文件中定義的 mybatis.configLocation 的值
        String configLocation = env.getProperty("mybatis.configLocation");
        typeAliasesPackage = setTypeAliasesPackage(typeAliasesPackage);
        VFS.addImplClass(SpringBootVFS.class);

        final SqlSessionFactoryBean sessionFactory = new SqlSessionFactoryBean();
        sessionFactory.setDataSource(dataSource);
        sessionFactory.setTypeAliasesPackage(typeAliasesPackage);
        // 在所有jar包的classpath下查找所有以Mapper.xml結(jié)尾的xml文件
        sessionFactory.setMapperLocations(new PathMatchingResourcePatternResolver().getResources(mapperLocations));
        sessionFactory.setConfigLocation(new DefaultResourceLoader().getResource(configLocation));
        return sessionFactory.getObject();
    }
}