spring集成ibatis，涉及到的一些核心类

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近期研究了下spring集成ibatis，涉及到的一些核心类，下面一个图大体的描述了这些类之间的一些关系：

1、ibatis通过SqlMapClient接口提供了访问数据库的相关操作。Spring的org.springframework.orm.ibatis.SqlMapClientFactoryBean类，负责创建SqlMapClient实体，具体的创建代码如下：

protected SqlMapClient buildSqlMapClient(Resource[] configLocations, Resource[] mappingLocations, Properties properties)throws IOException {if (ObjectUtils.isEmpty(configLocations)) {throw new IllegalArgumentException("At least 1 'configLocation' entry is required");}SqlMapClient client = null;SqlMapConfigParser configParser = new SqlMapConfigParser();for (int i = 0; i < configLocations.length; i++) {InputStream is = configLocations[i].getInputStream();try {client = configParser.parse(is, properties);}catch (RuntimeException ex) {throw new NestedIOException("Failed to parse config resource: " + configLocations[i], ex.getCause());}}if (mappingLocations != null) {SqlMapParser mapParser = SqlMapParserFactory.createSqlMapParser(configParser);for (int i = 0; i < mappingLocations.length; i++) {try {mapParser.parse(mappingLocations[i].getInputStream());}catch (NodeletException ex) {throw new NestedIOException("Failed to parse mapping resource: " + mappingLocations[i], ex);}}}return client;}

2、从上面的代码可以看出，ibatis通过SqlMapConfigParser类的parse方法，解析对应的XML配置文件，从而构造出SqlMapClient的实体。

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