SpringBoot-Mybatis插入Oracle数据库
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前端数据
有如下需求,前端提交一个对象cabinData,保存到数据表中,对象结构如下:
{ "shipId":"424", "shipName":"大唐2号", "ballastCabinData":["艏尖舱","双层底1左","双层底1右","双层底2左","双层底2右","双层底3左","双层底3右","双层底4左","双层底4右","双层底5左","双层底5右","顶边5左","顶边5右","尾尖舱"], "freshCabinData":["淡水舱1左","淡水舱1右"] }
数据表结构
数据表是oracle,表结构为:
后端Controller:
@PostMapping("/savecabin") public AjaxResult savecabin(@RequestBody Map<String,Object> postCabinData){ // 获取map中的参数 String shipIdStr = (String) postCabinData.get("shipId"); Integer shipId = Integer.valueOf(shipIdStr); String shipName = (String) postCabinData.get("shipName"); List<String> ballastCabinData = (List<String>) postCabinData.get("ballastCabinData"); List<String> freshCabinData = (List<String>) postCabinData.get("freshCabinData"); // 获取shipid下的所有的船舱记录 List<DraftCabin> list = draftCabinService.selectCabinByShipId(shipId); // 船舱记录大于0时,执行批量删除;船舱 if (list.size()>0){ List<Long> idcards= list.stream().map(DraftCabin::getCabinId).collect(Collectors.toList()); Long[] ids = idcards.toArray(new Long[idcards.size()]); draftCabinService.deleteDraftCabinByIds(ids); } // 批量插入船舱 draftCabinService.insertDraftCabins(ballastCabinData,shipId,"压舱水",shipName); draftCabinService.insertDraftCabins(freshCabinData,shipId,"淡水",shipName); return AjaxResult.success(); }
解析:
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使用Map<String,Object> 来接收前端cabinData的JSON对象:
使用map.get("shipId")方法来解析JSON获得对应的值。
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批量删除时,使用list.stream().map(DraftCabin::getCabinId).collect(Collectors.toList())方法,使用类中的getCabinId方法来将结果集中的cabbinId形成数组参数,入参批量删除方法deleteDraftCabinByIds
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批量插入时,调用service的insertDraftCabins方法,传入四个参数(ballastCabinData,shipId,"压舱水",shipName)
mapper:
public int insertDraftCabins(@Param("DraftCabin")List DraftCabin, @Param("shipId")Integer shipId, @Param("cabinType")String cabinType,@Param("shipName")String shipName) ;
解析:
mapper中,多个参数使用@Param注解来接收,在mybaits的xml中,调用注解名称。
xml
<!--批量新增--> <insert id="insertDraftCabins" useGeneratedKeys="false"> INSERT ALL <foreach collection="DraftCabin" item="item" index="index"> INTO draft_cabin (cabin_name,ship_id,cabin_type,ship_name) values(#{item},#{shipId},#{cabinType},#{shipName,jdbcType=VARCHAR}) </foreach> SELECT 1 FROM DUAL </insert>
解析:
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批量新增insertDraftCabins,接收多个参数,这时不要添加parameterType属性,useGeneratedKeys="false",一定要添加;
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foreach的collection是要遍历的对象,这里填写mapper中的注解名称;
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orcale的批量插入方法与mysql有很大区别,这里需要注意以下:
insert all into <tableName>[(<table_column1>,<table_column2>...)] values([<column_value1>,<column_value2>...]) [into <tableName>[(<table_column1>,<table_column2>...)] values([<column_value1>,<column_value2>...])]... select <table_value1>[,<table_value2>...] from dual;
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