力所能及之关于Mybatis SqlSession工具类

标签：sqlsession   mybatis   util   

小狼最近在做mybatis的CURD,发现一个小狼不能接受的问题，当然，小狼是比较懒的，见不得冗余代码

每一个CURD操作，小狼都得写一遍下面的代码，一口老血吐出来了...

SqlSessionFactoryBuilder sqlSessionFactoryBuilder = new SqlSessionFactoryBuilder();
			InputStream config = Resources
					.getResourceAsStream("mybatities-config.xml");
			SqlSessionFactory sqlSessionFactory = sqlSessionFactoryBuilder
					.build(config);
			SqlSession sqlSession = sqlSessionFactory.openSession();

为了小狼后半生幸福，决定了，写一个工具类

public class GetSqlSession {

	private static SqlSessionFactory sqlSessionFactory;
    
	private static ThreadLocal<SqlSession> tl = new ThreadLocal<SqlSession>();

	
	synchronized public static SqlSessionFactory getSqlSessionFactory() {

		try {
			InputStream isRef=GetSqlSession.class.getResourceAsStream("/DBMysql.properties");
			Properties properties=new Properties();
			properties.load(isRef);
			//Log.getLog().info("properties="+properties);
			if (sqlSessionFactory == null) {
				String resource = "mybatis-config.xml";
				InputStream inputStream = Resources
						.getResourceAsStream(resource);
				sqlSessionFactory = new SqlSessionFactoryBuilder()
						.build(inputStream,properties);
			} else {
			}
		} catch (IOException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}

		return sqlSessionFactory;
	}
	
	public static SqlSession getSqlSession() {
		SqlSession sqlSession = tl.get();
		if (sqlSession == null) {
			sqlSession = getSqlSessionFactory()
					.openSession();
			tl.set(sqlSession);
		} else {

		}
		//System.out.println("获得的sqlSession对象的hashCode：" + sqlSession.hashCode());
		return sqlSession;
	}

	public static void commit() {
		if (tl.get() != null) {
			tl.get().commit();
			tl.get().close();
			tl.set(null);
			//System.out.println("提交了");
		}
	}

	public static void rollback() {
		if (tl.get() != null) {
			tl.get().rollback();
			tl.get().close();
			tl.set(null);
			//System.out.println("回滚了");
		}
	}
}

SqlSession sqlSession = GetSqlSession.getSqlSession();

synchronized public static SqlSessionFactory getSqlSessionFactory() {

        try {
            InputStream isRef=GetSqlSession.class.getResourceAsStream("/DBMysql.properties");
            Properties properties=new Properties();
            properties.load(isRef);
            //Log.getLog().info("properties="+properties);
            if (sqlSessionFactory == null) {
                String resource = "mybatis-config.xml";
                InputStream inputStream = Resources
                        .getResourceAsStream(resource);
                sqlSessionFactory = new SqlSessionFactoryBuilder()
                        .build(inputStream,properties);
            } else {
            }
        } catch (IOException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }

        return sqlSessionFactory;
    }

这个小狼可以解释一下，小狼用的property，属性配置mybatis-config.xml，里面的参数，所以得读出property的文件内容，并与已经读出的mybatis-config.xml文件内容匹配，得到值，注入

写完了这么多，一口老血又咽回去了。。。

力所能及之关于Mybatis SqlSession工具类

标签：sqlsession   mybatis   util   

原文地址：http://blog.csdn.net/zhanglu1236789/article/details/45007685