mybatis 运行时加载自定义mapper文件方式

package com.springmvc.mybatis.dao;
import java.util.List;
public interface DatabaseObjectQueryDao { 
 List<String> getAllSequence(); 
}

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN"  
"http://mybatis.org/dtd/mybatis-3-mapper.dtd">
<mapper namespace="com.springmvc.mybatis.dao.DatabaseObjectQueryDao">
 <select id="getAllSequence" resultType="String">
  select sysdate from dual
 </select> 
</mapper>

package com.springmvc.mybatis.dao;
/**
 * Discript：
 *
 * @author 
 * @date 创建时间：2018/10/11 15:33
 */
public interface LoadMapperFileDao {
    String getAllSequence();
}

package com.springmvc.mybatis.test;
import org.apache.ibatis.builder.xml.XMLMapperBuilder;
import org.apache.ibatis.session.Configuration;
import org.apache.ibatis.session.SqlSessionFactory;
import org.springframework.beans.factory.InitializingBean;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import java.io.ByteArrayInputStream;
import java.io.InputStream;
/**
 * Discript：
 *
 * @author  
 * @date 创建时间：2018/10/11 15:01
 */
@Service
public class LoadMapperFileTest implements InitializingBean{
    @Autowired
    private SqlSessionFactory sqlSessionFactory;
    private Configuration mapperConfig;
    public void afterPropertiesSet() throws Exception {
    //mapper文件的实际内容，此处可根据业务需求进行拼装文件内容
        String contextXml = "<?xml version=\"1.0\" encoding=\"UTF-8\"?>\n" +
                "<!DOCTYPE mapper PUBLIC \"-//mybatis.org//DTD Mapper 3.0//EN\"  \n" +
                "\"http://mybatis.org/dtd/mybatis-3-mapper.dtd\">\n" +
                "<mapper namespace=\"com.springmvc.mybatis.dao.LoadMapperFileDao\">\n" +
                "\t<select id=\"getAllSequence\" resultType=\"String\">\n" +
                "\t\tselect sysdate from dual \n" +
                "\t</select>\n" +
                "</mapper>";
         //一般与namespace相同
        String mapperId = "com.springmvc.mybatis.dao.LoadMapperFileDao";
        mapperConfig = sqlSessionFactory.getConfiguration();
        try {
            InputStream is = new ByteArrayInputStream(contextXml.getBytes());
            XMLMapperBuilder xmlMapperBuilder = new XMLMapperBuilder(is, this.mapperConfig, mapperId, this.mapperConfig.getSqlFragments());
            xmlMapperBuilder.parse();
            System.out.println("自定义加载完毕!");
        }catch (Exception e){
        }
    }
}

<mappers>
	<mapper resource="com/yangtao9898/jungle_war_server/mapper/UserDao.xml"/>
</mappers>

<mappers>
	<mapper class="com.yangtao9898.jungle_war_server.dao.UserDao"/>
</mappers>

<mappers>
	<package name="com.yangtao9898.jungle_war_server.dao"/>
</mappers>