ibatis

本文是原创文章，转载请注明出处： http://my.oschina.net/fqt/blog/52431 一直以来ibatis的分页都是通过滚动ResultSet实现的，应该算是逻辑分页吧。逻辑分页虽然能很干净地独立于特定数据库，但效率在多数情况下不及特定数据库支持的物理分页，而hibernate的分页则是直接组装sql，充分利用了特定数据库的分页机制，效率相对较高。 网上已有 《使ibatis支持hibernate式的物理分页》等类似的文章以 继承 SqlExecutor的方式 实现了物理分页， 但是 侵入性非常强，还得实现数据库方言 ，方法非常复杂。同时 SqlExecutor不是接口，对它的方法继承也不能保证版本稳定。本文中将介绍的方式是实现queryWithSqlHandler方法，在查询前将通过SqlHandler接口把sql传给调用者，再用处理后的sql进行最终查询，从而实现物理分页等功能： //用queryWithSqlHandler方法实现物理分页的例子： public Page queryPage(String statementId, param, final Page page){ final int pageNum = page.getPageNum(); final int pageSize = page.getPageSize(); List list

I have read the book and documentation about Mybatis, both XML and Annotation does what I want, but from myBatis official website, they claim XML is a better way of doing Mappers, because Java annotation has limitations. I personally prefer Annotations e.g public interface PersonDAO { String INSERT_PERSON = "insert into person (title,firstName,surName,jobTitle,dob,email,mobile,landPhone,fax,twitter,facebook,linkedin) VALUES (#{title},#{firstName},#{surName},#{jobTitle},#{dob},#{email},#{mobile},#{landPhone},#{fax},#{twitter},#{facebook},#{linkedin})"; String UPDATE_PERSON = "update person set

这两天做SpringBoot整合Mybatis项目的时候，插入时报错： 3:45:59.936 DEBUG [http-nio-8080-exec-8] o.s.w.s.m.m.a.ExceptionHandlerExceptionResolver 133 - Resolving exception from handler [public java.lang.String com.yooli.sale.html.controller.reduce.ReduceController.saveApply()]: java.lang.RuntimeException: org.apache.ibatis.binding.BindingException: Invalid bound statement (not found): com.yooli.sale.dao.reduce.ReduceMapper.insert org.apache.ibatis.binding.BindingException: Invalid bound statement (not found): com.yooli.sale.dao.reduce.ReduceMapper.insert at org.apache.ibatis.binding.MapperMethod$SqlCommand.<init>

转： SqlSession [org.apache.ibatis.session.defaults.DefaultSqlSession@4529fa91] 2018-12-25 13:41:00 木林森淼 阅读数 13904 更多 分类专栏： Mybatis 版权声明：本文为博主原创文章，遵循 CC 4.0 BY-SA 版权协议，转载请附上原文出处链接和本声明。 本文链接： https://blog.csdn.net/yangfengjueqi/article/details/85246411 控制台日志如下 DEBUG - Creating a new SqlSession DEBUG - SqlSession [org.apache.ibatis.session.defaults.DefaultSqlSession@ 4529fa91] was not registered for synchronization because synchronization is not active DEBUG - Closing non transactional SqlSession [org.apache.ibatis.session.defaults.DefaultSqlSession@ 4529fa91] 并没有看出错误原因是什么，可以断定是SQL语句那里的

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 问题: For our new product re-engineering, we are in the process of selecting the best framework from Java. As the consideration is to go for database agnostic approach for model, we are working on options between Struts + Spring with iBATIS or Hibernate. Please advice which is best as both offer persistence. 回答1: Ibatis and Hibernate are quite different beasts. The way I tend to look at it is this: Hibernate works better if your view is more object-centric . If however you view is more database-centric then Ibatis is a much stronger choice. If you

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 由 翻译 强力驱动 问题: I have a list of object where I want to iterate and access a particular field in ibatis sql. Ex. public Class Student { String id ; String name ; } I will pass as parameter a List of Student object(List(Student)) and do iteration accessing the id for each object bean. How do I do this? 回答1: The foreach -tag is what you are looking for. Example: SELECT * FROM POST P WHERE ID in #{item} See the user guide for more info, chapter "dynamic sql". By the way, iBatis is no longer developed and is frozen, it is now called "MyBatis" and the

I like the XML notation for specifying global parameters such as connection strings. I also like Mapper annotations. When I try to combine the two, I get this exception . Is there a way to combine the two? I would like to use an XML file for the global configurations, but have mybatis take Mapper interfaces into account. The problem is that SqlSessionFactoryBuilder().build() takes either a Reader (which I want to use to pass the XML config), or a Configuration object (which I see has the addMappers() method that can help me) - but I don't understand how to combine the two. Atilio Ranzuglia

我这里的报错信息显示： org.apache.ibatis.binding.BindingException: Parameter ‘reqUsername‘ not found. Available parameters are [0, 1, param1, param2] 原因：当只有一个参数时，Mapper中可以不使用@Param，但是当有多个参数的时候，要使用@Param。 原来的代码： @Select("select * from tz_user where " + GlobalConfigure.USER_AUTH_SQL_SUFFIX) List<User> getAllUser(String reqUsername, String reqPasswd); 改成： @Select("select * from tz_user where " + GlobalConfigure.USER_AUTH_SQL_SUFFIX) List<User> getAllUser(@Param("reqUsername") String reqUsername, @Param("reqPasswd") String reqPasswd); 就成功返回结果了。 原文：https://www.cnblogs.com/zifeiy/p/9279121.html

项目切换为K8S的时候访问出现异常，路过的伙伴可以帮忙分析一下哈： Caused by: org.apache.ibatis.exceptions.PersistenceException: ### Error querying database. Cause: org.springframework.jdbc.CannotGetJdbcConnectionException: Could not get JDBC Connection; nested exception is java.sql.SQLException: Connections could not be acquired from the underlying database! ### The error may exist in class path resource [firsthand-core-sqlmap/cdm/YlQuarzRegisterPHKXMapper.xml] ### The error may involve com.yooli.cdm.dao.YlQuarzRegisterPHKXMapper.selectIsSuccess ### The error occurred while executing a query ### Cause: org.springframework

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