¸ÃÖø×÷ÊÇpdf¸ñʽÎļþÁ¢¼´ÏÂÔØ ¸£ê¿pdfÔĶÁÈí¼þ

MyBatis ÊÇÊÊÓÃÒ»°ã SQL ²é¿´£¬sqlÓï¾äºÍ¸ß¼‰Ó³ÉäµÄ³öÉ«³Ö¾Ã²ã¼Ü¹¹¡£MyBatis Çå³ý

Á˽üºõÈÎºÎµÄ JDBC ±àÂëºÍÖ÷Òª²ÎÊýµÄÊÖ¹¤ÖÆ×÷É趨¼°Æä½Y¹û¼¯µÄ²éÕÒ¡£MyBatis Ó¦Óõ¥Ò»µÄ XML

»ò×¢ÊÍÓÃÒÔÅ䱸ºÍ³õʼӳÉ䣬½«²å¿ÚºÍ Java µÄ POJOs£¨Plan Old Java Objects£¬Ò»°ãµÄ Java

¶ÔÏó£©Ó³Éä³ÉÊý¾ÝÖеļͼ¡£

ÐÂÊÖÈëÃÅ

ÿһ¸ö MyBatis µÄÓ¦ ÓóÌÐòÁ÷³Ì ¶¼ÒÔÒ» ¸ö SqlSessionFactory ¶ÔÏóµÄ ʵÀýΪ ¹Ø¼ü¡£

SqlSessionFactory ¶Ô Ïó µÄ ʵ Àý ¿É ÒÔ Í¨ ¹ý SqlSessionFactoryBuilder

¶Ô Ïó À´ »ñ µÃ ¡£

SqlSessionFactoryBuilder ¶ÔÏó¿ÉÒÔ´Ó XML ÅäÖÃÎļþ£¬»ò´Ó Configuration ÀàµÄÏ°¹ßÐÔÌáÇ°×¼±¸µÄʵ

ÀýÖд SqlSessionFactory ¶ÔÏó¡£

´Ó XML Öд SqlSessionFactory

´Ó XML ÎĵµÖд SqlSessionFactory µÄʵÀý±È½Ï¼òµ¥¡£Õâ¶ùÌáÒéÄãÓ¦ÓÃÀà;¾¶ÏµÄ×Ê

Ô´´úÂëÀ´Å䱸£¬¿ÉÊÇÄãÄÜÓ¦ÓÃËæÒâµÄ Reader ʵÀý£¬ÕâһʵÀý°üº¬ÓÉÎı¾·½Ê½µÄÎļþ·¾¶

»ò URL ·½Ê½µÄÎļþ·¾¶ file://À´½¨Á¢¡£MyBatis °üº¬ÁËһЩjava¹¤¾ß£¬³Æ×öΪÙYÔ´£¬ÕâÖÖרÓù¤¾ß

Àà°üº¬Ò»Ð©·½Ê½£¬ÕâÖÖ·½Ê½´Ùʹ´ÓÀà;¾¶»ò±ðµÄ²¿Î»ÔØÈëÙYÔ´Îĵµ¸üΪ¼òÒס£

String resource = org/mybatis/example/Configuration.xml;

Reader reader = Resources.getResourceAsReader(resource);

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

XML ÅäÖÃÎļþ°üº¬¶Ô MyBatis ϵͳÈí¼þµÄ¹Ø¼üÉ趨£¬°üº¬»ñµÃÁ¬½ÓÊý¾Ý¿âʵÀýµÄÊý¾Ý¿âºÍ

¾ö²ßÊÂÎñ¹ÜÀí·¶³ëºÍ²Ù×ݵÄÊÂÎñ¹ÜÀí¹ÜÀí¹¤¾ß¡£ÓÐ¹Ø XML ÅäÖÃÎļþµÄÏ꾡ƒÈÈÝ¿ÉÒÔÔÚÎı¾Îĵµºó±ßÑ°ÕÒ£¬

Õâ¶ùµÃ³öÒ»¸ö¼ò½àµÄʵÀý£º

lt;?xml version=1.0 encoding=UTF-8 ?gt;

lt;!DOCTYPE configuration PUBLIC Config 3.0//EN

http://mybatis.org/dtd/mybatis-3-config.dtdgt;

lt;configurationgt;

lt;environments default=developmentgt;

lt;environment id=developmentgt;

lt;transactionManager type=JDBC/gt;

lt;dataSource type=POOLEDgt;

lt;property name=driver value=${driver}/gt;

lt;property name=url value=${url}/gt;

lt;property name=username value=${username}/gt;

lt;property name=password value=${password}/gt;

lt;/dataSourcegt;

lt;/environmentgt;

lt;/environmentsgt;

lt;mappersgt;

lt;mapper resource=org/mybatis/example/BlogMapper.xml/gt;

lt;/mappersgt;

lt;/configurationgt;

×ÔÈ»£¬ÔÚXMLÅäÖÃÎļþÖÐÒ²ÓÐÐí¶à¿ÉÒÔÅ䱸µÄ£¬ÉϱߵÄʵÀýÇ¿µ÷µÄÔòÊÇ×îºËÐĵÄÒ»²¿·Ö¡£

ÒªÁôÒâ XML Í·¶¥²¿µÄÉêÃ÷£¬±ØÐëÓÃÓÚÈÏÖ¤ XML Îı¾Îĵµ×¼È·ÐÔ¡£environment Ô­ËØÌåÀï°üº¬¶ÔÊÂ

Îñ¹ÜÀí·½·¨ºÍÊý¾Ý¿âÁ¬½Ó³ØµÄ×ÔÈ»»·¾³Å䱸¡£mappers Ô­ËØÊÇ°üº¬È«²¿ mapper £¨Ó³ÉäÆ÷£©µÄĿ¼£¬ÕâÖÖ mapper

µÄ XML Îĵµ°üº¬ SQL ±àÂëºÍÓ³Éä½ç¶¨ÐÅÏ¢ÄÚÈÝ¡£