MyBatis扫描通过VFS来实现

在Spring Boot中，由于是嵌套Jar，导致Mybatis默认的VFS实现DefaultVFS无法扫描嵌套Jar中的类。

解决办法，实现自定义的VFS，参考DefaultVFS增加对Spring Boot嵌套JAR的处理。

1。

import java.io.IOException;import java.net.MalformedURLException;import java.net.URL;import java.util.ArrayList;import java.util.List;import java.util.jar.JarEntry;import java.util.jar.JarInputStream;import org.springframework.util.ResourceUtils;import lombok.extern.slf4j.Slf4j;import net.sourceforge.stripes.vfs.DefaultVFS;@Slf4jpublic class SpringBootVfs extends DefaultVFS {	@Override	protected URL findJarForResource(URL url) throws MalformedURLException {		url = ResourceUtils.extractJarFileURL(url);		return (isJar(url)) ? url : null;	}		@Override	protected boolean isJar(URL url) {		return url.getPath().toLowerCase().endsWith(ResourceUtils.JAR_FILE_EXTENSION)				|| url.getPath().toLowerCase().endsWith(".war");	}	/**	 * List the names of the entries in the given {@link JarInputStream} that	 * begin with the specified {@code path}. Entries will match with or without	 * a leading slash.	 * 	 * @param jar The JAR input stream	 * @param path The leading path to match	 * @return The names of all the matching entries	 * @throws IOException If I/O errors occur	 */	@Override	protected List
    
      listResources(JarInputStream jar, String path) throws IOException {		// Include the leading and trailing slash when matching names		if (!path.startsWith("/"))			path = "/" + path;		if (!path.endsWith("/"))			path = path + "/";		// Iterate over the entries and collect those that begin with the		// requested path		List
     
       resources = new ArrayList
      
       ();		for (JarEntry entry; (entry = jar.getNextJarEntry()) != null;) {			if (!entry.isDirectory()) {				// Add leading slash if it's missing				String name = entry.getName();				if (!name.startsWith("/"))					name = "/" + name;				// Check file name				if (name.startsWith(path) || name.startsWith("/WEB-INF/classes" + path)) {					log.trace("Found resource: ", name);					resources.add(name.substring(1)); // Trim leading slash				}			}		}		return resources;	}}
      
     
    

2在创建sqlSessionFactoryBean时

 加入

VFS.addImplClass(SpringBootVFS.class);

@Bean(name = "sqlSessionFactory")    public SqlSessionFactory sqlSessionFactoryBean() {    	//解决myBatis下 不能嵌套jar文件的问题    	VFS.addImplClass(SpringBootVFS.class);        SqlSessionFactoryBean bean = new SqlSessionFactoryBean();        bean.setDataSource(dataSource);        bean.setTypeAliasesPackage("org.weichai");        // 分页插件        PageHelper pageHelper = new PageHelper();        Properties props = new Properties();        props.setProperty("reasonable", "true");        props.setProperty("supportMethodsArguments", "true");        props.setProperty("returnPageInfo", "check");        props.setProperty("params", "count=countSql");        pageHelper.setProperties(props);        //添加XML目录        ResourcePatternResolver resolver = new PathMatchingResourcePatternResolver();        try {        	  // 添加插件            bean.setPlugins(new Interceptor[] { pageHelper });            bean.setMapperLocations(resolver.getResources("classpath*:mapper/**/*.xml"));            return bean.getObject();        } catch (Exception e) {            e.printStackTrace();            throw new RuntimeException(e);        }    }