ibatis | 易学教程

Pass and return custom array object in ibatis and oracle in java

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问题 I've looked around for a good example of this, but I haven't run into one yet. I want to pass a custom string array from java to oracle and back, using the IBATIS framework. Does anyone have a good link to an example? I'm calling stored procs from IBATIS. Thanks 回答1: You've got to start with a custom instance of TypeHandler . We'd prefer to implement the simpler TypeHandlerCallback , but in this scenario we need access to the underlying Connection . public class ArrayTypeHandler implements

ibatis/Mybatis 配备调用存储过程，jdbctype配置

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ibatis 配置调用存储过程，jdbctype配置数据库存储过程如下： procedure p_project_details_stat ( i_date_start in varchar2, i_date_end in varchar2, i_range_start in number, i_range_end in number, i_org_id in number, i_species_id IN VARCHAR2, i_query_user_id in number, o_report_id out number ) 配置调用如下： <parameterMap id="proMap" class="map"> <parameter property="complainDateStart" javaType="java.lang.String" mode="IN" jdbcType="VARCHAR" /> <parameter property="complainDateEnd" javaType="java.lang.String" mode="IN" jdbcType="VARCHAR" /> <parameter property="priceOne" javaType="java.math.BigDecimal" mode="IN" jdbcType=

Unable to convert MySQL date/time value to System.DateTime

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问题 I am using ibatis and C#. i get a result from a select query that has CreatedDate as one of the field. The Datatype of CreatedDate in Mysql is Date. I assign the result set of the select query to a Ilist< DeliveryClass>. Here the DeliveryClass CreatedDate as DateTime. When i run the application, i get Unable to convert MySQL date/time value to System.DateTime . What could be the problem? 回答1: The problem in the format, actually mysql have a different format (yyyy-mm-dd) for the date/time data

How to use an IN clause in iBATIS?

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问题 I'm using iBATIS to create select statements. Now I would like to implement the following SQL statement with iBATIS: SELECT * FROM table WHERE col1 IN ('value1', 'value2'); With the following approach, the statement is not prepared correctly and no result returns: SELECT * FROM table WHERE col1 IN #listOfValues#; iBATIS seems to restructure this list and tries to interpret it as a string. How can I use the IN clause correctly? 回答1: Here's a blog post that answers your question: iBatis:

Return HashMap in mybatis and use it as ModelAttribute in spring MVC

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I want to display list of categories in my Jsp page using spring mvc @modelAttribute. In my mapper.xml file is <select id="selectAllCategories" resultMap="BaseResultMap"> select id, name from categories </select> In my Mapper.java class I have method List<Map<String, String>> selectAllCategories(); I want to have a method like this: Map<Integer, String>`selectAllCategories(); instead of List<Map<>> , is that possible? quux00 You want to get a Map<Integer,String> where the Integer is the id and the String is the name . If there were 200 categories in your table, you would want 200 entries in

How to use Annotations with iBatis (myBatis) for an IN query?

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We'd like to use only annotations with MyBatis; we're really trying to avoid xml. We're trying to use an "IN" clause: @Select("SELECT * FROM blog WHERE id IN (#{ids})") List<Blog> selectBlogs(int[] ids); MyBatis doesn't seem able to pick out the array of ints and put those into the resulting query. It seems to "fail softly" and we get no results back. It looks like we could accomplish this using XML mappings, but we'd really like to avoid that. Is there a correct annotation syntax for this? I believe this is a nuance of jdbc's prepared statements and not MyBatis. There is a link here that

mybatis框架学习-延迟加载

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罗里吧嗦延迟加载：就是在需要用到数据时才进行加载，不需要用到数据时就不加载数据。延迟加载也称懒加载，按需加载。延迟加载对应的是立即加载：不管用不用，只要一调用方法，马上发起查询。好处：先从单表查询，需要时再从关联表去关联查询，大大提高数据库性能，因为查询单表要比关联查询多张表速度要快。坏处：因为只有当需要用到数据时，才会进行数据库查询，这样在大批量数据查询时，因为查询工作也要消耗时间，所以可能造成用户等待时间变长，造成用户体验下降实际开发过程中很多时候我们并不需要总是在加载用户信息时就一定要加载他的账户信息。此时就是我们所说的延迟加载。在对应的四种表关系中：一对多，多对一，一对一，多对多一对多，多对多：通常情况下我们都是采用延迟加载。多对一，一对一：通常情况下我们都是采用立即加载。概要 1.打开延迟加载 <configuration> <settings>  <setting name="lazyLoadingEnabled" value="true"></setting>   <

Howto return ids on Inserts with Ibatis ( with RETURNING keyword )

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问题 I'm using iBatis/Java and Postgres 8.3. When I do an insert in ibatis i need the id returned. I use the following table for describing my question: CREATE TABLE sometable ( id serial NOT NULL, somefield VARCHAR(10) ); The Sequence sometable_id_seq gets autogenerated by running the create statement. At the moment i use the following sql map: <insert id="insertValue" parameterClass="string" > INSERT INTO sometable ( somefield ) VALUES ( #value# ); <selectKey keyProperty="id" resultClass="int">

org.apache.ibatis.ognl.MethodFailedException: Method "size" failed for object

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1 问题描述 mybatis3.2.x版本，做压力测试，并发200用户，出现了如下异常. org.apache.ibatis.builder.BuilderException: Error evaluating expression 'size() > 0'. Cause: org.apache.ibatis.ognl.MethodFailedException: Method "size" failed for object [one, two] [java.lang.IllegalAccessException: Class org.apache.ibatis.ognl.OgnlRuntime can not access a member of class java.util.Collections$UnmodifiableCollection with modifiers "public"] at org.apache.ibatis.scripting.xmltags.OgnlCache.getValue(OgnlCache.java:47) at org.apache.ibatis.scripting.xmltags.ExpressionEvaluator.evaluateBoolean(ExpressionEvaluator.java:29) at

nested exception is org.apache.ibatis.builder.BuilderException: Error parsing Mapper XML.

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写完Mapper后，AJ项目运行报错 nested exception is org.apache.ibatis.builder.BuilderException: Error parsing Mapper XML. 百度翻译：嵌套的异常是org.apache.ibatis.builder.builderException:分析映射器XML时出错。解决方法：参考https://blog.csdn.net/weixin_39881983/article/details/88324706 尝试解决：　　1：说是mybatis的MapperScan和通用mapper的MapperScan，查看了自己项目的注解，发现application上有@MapperScan,并且dao接口上也有@Mapper,去掉dao接口上的@Mapper;【没解决】　　2：查看自己的mapper.xml文件　　　　去掉resultMap的JdbcType属性　　　　cloum中的字段大写不报错了自己写的东西要负责的啊。来源： https://www.cnblogs.com/LearnSB/p/11347277.html