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一、解析xml: > org.apache.ibatis.session.SqlSessionFactoryBuilder.build(java.io.InputStream, java.lang.String, java.util.Properties) > org.apache.ibatis.builder.xml.XMLConfigBuilder.parse > org.apache.ibatis.builder.xml.XMLConfigBuilder.parseConfiguration > org.apache.ibatis.builder.xml.XMLConfigBuilder.environmentsElement "environments" > org.apache.ibatis.builder.xml.XMLConfigBuilder.mapperElement "mappers" "package/resource/url/class" > org.apache.ibatis.builder.xml.XMLMapperBuilder.parse > org.apache.ibatis.builder.xml.XMLMapperBuilder.configurationElement > org.apache.ibatis.builder.xml.XMLMapperBuilder.parameterMapElement "/mapper/parameterMap" > org.apache.ibatis.builder.xml.XMLMapperBuilder.resultMapElements "/mapper/resultMap" > org.apache.ibatis.builder.xml.XMLMapperBuilder.sqlElement(java.util.List<org.apache.ibatis.parsing.XNode>) "/mapper/sql" > org.apache.ibatis.builder.xml.XMLMapperBuilder.buildStatementFromContext(java.util.List<org.apache.ibatis.parsing.XNode>) "select|insert|update|delete" 构建statement > org.apache.ibatis.builder.xml.XMLStatementBuilder.parseStatementNode 将mapper里写的sql转化为statement ↓创建statement sql语句RawSqlSource对象,将#{}转为?,并将#{}里的参数名存在对象中 ↓关于${}:封装为DynamicSqlSource > org.apache.ibatis.scripting.LanguageDriver.createSqlSource(org.apache.ibatis.session.Configuration, org.apache.ibatis.parsing.XNode, java.lang.Class<?>) > org.apache.ibatis.scripting.xmltags.XMLScriptBuilder.parseScriptNode > org.apache.ibatis.builder.MapperBuilderAssistant.addMappedStatement(java.lang.String, org.apache.ibatis.mapping.SqlSource, org.apache.ibatis.mapping.StatementType, org.apache.ibatis.mapping.SqlCommandType, java.lang.Integer, java.lang.Integer, java.lang.String, java.lang.Class<?>, java.lang.String, java.lang.Class<?>, org.apache.ibatis.mapping.ResultSetType, boolean, boolean, boolean, org.apache.ibatis.executor.keygen.KeyGenerator, java.lang.String, java.lang.String, java.lang.String, org.apache.ibatis.scripting.LanguageDriver, java.lang.String) ↑以上是解析xml文件,解析出statement,SqlSource ↓以下是将mapper接口和命名空间绑定 > org.apache.ibatis.builder.xml.XMLMapperBuilder.bindMapperForNamespace > 二、openSession操作: > org.apache.ibatis.session.defaults.DefaultSqlSessionFactory.openSessionFromDataSource > org.apache.ibatis.transaction.TransactionFactory.newTransaction(javax.sql.DataSource, org.apache.ibatis.session.TransactionIsolationLevel, boolean) > org.apache.ibatis.session.Configuration.newExecutor(org.apache.ibatis.transaction.Transaction, org.apache.ibatis.session.ExecutorType) > org.apache.ibatis.session.defaults.DefaultSqlSession new 三、getMapper: > org.apache.ibatis.binding.MapperRegistry.getMapper > org.apache.ibatis.binding.MapperProxyFactory.newInstance(org.apache.ibatis.session.SqlSession) ↓jdk动态代理 > org.apache.ibatis.binding.MapperProxy > org.apache.ibatis.binding.MapperProxyFactory.newInstance(org.apache.ibatis.binding.MapperProxy<T>) 四、查询: > org.apache.ibatis.session.defaults.DefaultSqlSession.selectOne(java.lang.String, java.lang.Object) > org.apache.ibatis.session.defaults.DefaultSqlSession.selectList(java.lang.String, java.lang.Object, org.apache.ibatis.session.RowBounds) > org.apache.ibatis.session.defaults.DefaultSqlSession.wrapCollection ↑封装参数 ↓关于绑定参数名@Param: > org.apache.ibatis.session.Configuration.getMappedStatement(java.lang.String) > org.apache.ibatis.executor.BaseExecutor.query(org.apache.ibatis.mapping.MappedStatement, java.lang.Object, org.apache.ibatis.session.RowBounds, org.apache.ibatis.session.ResultHandler, org.apache.ibatis.cache.CacheKey, org.apache.ibatis.mapping.BoundSql) ↓通过SqlSource,解析出sql,解析成?,得到参数 > org.apache.ibatis.mapping.MappedStatement.getBoundSql > org.apache.ibatis.executor.BaseExecutor.queryFromDatabase > org.apache.ibatis.executor.SimpleExecutor.doQuery > org.apache.ibatis.executor.SimpleExecutor.prepareStatement 拼装sql的parameter查询条件 **** > org.apache.ibatis.scripting.defaults.DefaultParameterHandler.setParameters 将得到的参数设置到对应的顺序,还包括JdbcType等 **** > org.apache.ibatis.executor.statement.StatementHandler.query 执行查询 > java.sql.Statement.execute(java.lang.String) 提交查询 > org.apache.ibatis.executor.resultset.DefaultResultSetHandler.handleResultSets 处理结果集
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