匹配session

package dl.zhang.test.util;

import java.io.IOException;
import java.io.Reader;
import org.apache.ibatis.io.Resources;
import org.apache.ibatis.session.SqlSession;
import org.apache.ibatis.session.SqlSessionFactory;
import org.apache.ibatis.session.SqlSessionFactoryBuilder;

public class SessionUtil {

    private static ThreadLocal<SqlSession> th_session = new ThreadLocal<SqlSession>();

    private static SqlSessionFactory ssf = null;

    static {
        try {
            //mybatis.cfg.xml是核心配置的名字要根据自己核心配置名字去填写
            Reader reader = Resources.getResourceAsReader("mybatis.cfg.xml");

            ssf = new SqlSessionFactoryBuilder().build(reader);

        } catch (IOException e) {

            e.printStackTrace();
        }
    }

    public static SqlSession getCurrentSession() {
        SqlSession session = th_session.get();
        if (session == null) {
            session = ssf.openSession();
            th_session.set(session);
        }
        return session;
    }

    public static void closeSession() {
        SqlSession session = th_session.get();
        if (session != null) {
            session.close();
            th_session.set(null);
        }

    }
}