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);
         }

     }
 }