??????????? 上次写[简单]Spring_Mybatis_CRUD简单示例(带数据库),遇到一个问题,在返回Map类型时候没有解析正确,不得不返回一个JavaBean,趁着有空,重新看了下,现在可以用Mybatis返回Map,List<Map>了。
??????????? 返回Map,Mybatis配置如下:
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class="sql"><select id="getCountyHashMap" resultType="java.util.HashMap"> select name,id from tsql_test_region where id=#{id} </select>
??? ServiceImpl如下:
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public Map<String, Long> getCountyHashMap(long id) { Map<String, Object> regionMap = regionInfoMapper.getCountyHashMap(id); Map<String, Long> resultMap = new HashMap<String, Long>(); String region = null; Long vid = null; for (Map.Entry<String, Object> entry : regionMap.entrySet()) { if ("NAME".equals(entry.getKey())) { region = (String) entry.getValue(); } else if ("ID".equals(entry.getKey())) { vid = ((java.math.BigDecimal) entry.getValue()).longValue(); } } resultMap.put(region, vid); return resultMap; }
??? Controller如下:
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@RequestMapping(value = "/region3", method = RequestMethod.GET) public @ResponseBody Map<String, Long> getCountyMap(@RequestParam(required = true) int regionId) { return regionInfoService.getCountyHashMap(regionId); }
??? 结果为:
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???
???? 返回List<Map>类似:
???? Mybatis配置:
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<select id="getRegionHashMap" resultType="java.util.HashMap"> select name,id from tsql_test_region order by id </select>
?? ServiceImpl如下:
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public Map<String, Long> getRegionHashMap() { List<Map<String, Object>> regionMap = regionInfoMapper .getRegionHashMap(); Map<String, Long> resultMap = new HashMap<String, Long>(); for (Map<String, Object> map : regionMap) { String region = null; Long id = null; for (Map.Entry<String, Object> entry : map.entrySet()) { if ("NAME".equals(entry.getKey())) { region = (String) entry.getValue(); } else if ("ID".equals(entry.getKey())) { id = ((java.math.BigDecimal) entry.getValue()).longValue(); } } resultMap.put(region, id); } return resultMap; }
?? Controller如下:
??
@RequestMapping(value = "/region2", method = RequestMethod.GET) public @ResponseBody Map<String, Long> getRegionMap() { return regionInfoService.getRegionHashMap(); }
??? 结果为:
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???
????? 本文系原创,转载请注明出处,谢谢。
????? 全文完。
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