mybaits3.2.8 别名包扫描通配符

<mybatis.version>3.2.8</mybatis.version>
<mybatis.spring.version>1.2.2</mybatis.spring.version>
<mybatis.generator.version>1.3.2</mybatis.generator.version>

MBG

http://www.mybatis.org/spring/apidocs/reference/org/mybatis/spring/SqlSessionFactoryBean.html

这几天搭建了spring4.1.2+mybatis3.2.8一个简单的框架。

发现mybatis的SqlSessionFactoryBean可以配置typeAliasesPackage属性，自动为domain起别名。

如果我的domain在不同包下面，那么这个配置不支持通配符扫描包路径？如下改造：

改造前：applicationContext.xml配置：

<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：applicationContext.xml配置：

<bean id="sqlSessionFactory" class="com.demo.core.mybatis.TQSqlSessionFactoryBean">
    <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>

com.demo.core.mybatis.TQSqlSessionFactoryBean类源码：

package com.demo.core.mybatis;

import java.io.File;
import java.io.IOException;

import org.mybatis.spring.SqlSessionFactoryBean;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.core.io.Resource;
import org.springframework.core.io.support.PathMatchingResourcePatternResolver;
import org.springframework.core.io.support.ResourcePatternResolver;

import com.demo.core.utils.StringUtil;

/**
 * @ClassName: TQSqlSessionFactoryBean
 * @Description: mybatis自动扫描别名路径（新增通配符匹配功能）
 * @author wangxiaohu wsmalltiger@163.com
 * @date 2014年12月9日 上午9:36:23
 */
public class TQSqlSessionFactoryBean extends SqlSessionFactoryBean {
    Logger logger = LoggerFactory.getLogger(getClass());
    private static final String ROOT_PATH = "com" + File.separator + "demo"
            + File.separator;
    private static final String ROOT_PATH_SPLIT = ",";
    private static final String[] PATH_REPLACE_ARRAY = { "]" };

    public void setTypeAliasesPackage(String typeAliasesPackage) {
        if (!StringUtil.isStringAvaliable(typeAliasesPackage)) {
            super.setTypeAliasesPackage(typeAliasesPackage);
            return;
        }
        ResourcePatternResolver resolver = new PathMatchingResourcePatternResolver();
        StringBuffer typeAliasesPackageStringBuffer = new StringBuffer();
        try {
            for (String location : typeAliasesPackage.split(",")) {
                if (!StringUtil.isStringAvaliable(location)) {
                    continue;
                }
                location = "classpath*:"
                        + location.trim().replace(".", File.separator);
                typeAliasesPackageStringBuffer.append(getResources(resolver,
                        location));
            }
        } catch (IOException e) {
            logger.error(e.getMessage(), e);
        }
        if ("".equals(typeAliasesPackageStringBuffer.toString())) {
            throw new RuntimeException(
                    "mybatis typeAliasesPackage 路径扫描错误！请检查applicationContext.xml@sqlSessionFactory配置！");
        }
        typeAliasesPackage = replaceResult(
                typeAliasesPackageStringBuffer.toString()).replace(
                File.separator, ".");
        super.setTypeAliasesPackage(typeAliasesPackage);
    }

    private String getResources(ResourcePatternResolver resolver,
            String location) throws IOException {
        StringBuffer resourcePathStringBuffer = new StringBuffer();
        for (Resource resource : resolver.getResources(location)) {
            String description = resource == null ? "" : resource
                    .getDescription();
            if (!StringUtil.isStringAvaliable(resource.getDescription())
                    || description.indexOf(ROOT_PATH) == -1) {
                continue;
            }
            resourcePathStringBuffer.append(
                    description.substring(description.indexOf(ROOT_PATH)))
                    .append(ROOT_PATH_SPLIT);
        }
        return resourcePathStringBuffer.toString();
    }

    private String replaceResult(String resultStr) {
        for (String replaceStr : PATH_REPLACE_ARRAY) {
            resultStr = resultStr.replace(replaceStr, "");
        }
        return resultStr;
    }
}

题外话：

typeAliasesPackage配置路径下的domain中可以添加@org.apache.ibatis.type.Alias(value = "user")注解；如果添加此注解，则别名使用此注解所指定的名称。如果没有配置，则默认为类名首字母小写。

http://blog.csdn.net/wsmalltiger/article/details/41825375