Mybatis 結果對映下劃線轉駝峰
阿新 • • 發佈:2019-01-09
mybatis 結果對映下劃線轉駝峰
Spring Boot 配置:
#下劃線轉駝峰
mybatis.configuration.map-underscore-to-camel-case=true
mybatis XML 配置
<configuration> <!-- 全域性配置 --> <settings> <!-- 是否開啟自動駝峰命名規則(camel case)對映,即從資料庫列名 A_COLUMN 到屬性名 aColumn 的類似對映 --> <setting name="mapUnderscoreToCamelCase" value="true"/> </settings> </configuration>
當resultTpye=map時,以上的配置無效
通過實現ObjectWrapperFactory
介面,可以判斷當object 是 Map 型別時,返回 true,然後在下面的 getWrapperFor 中返回一個可以處理 key 為駝峰的 Wrapper 類即可。
實現ObjectWrapperFactory
Spring boot 配置
@Configuration public class MybatisConfig { /** * mybatis resultType為map時下劃線鍵值轉小寫駝峰形式插 */ @Bean public ConfigurationCustomizer configurationCustomizer() { return configuration -> configuration.setObjectWrapperFactory(new MapWrapperFactory()); } static class MapWrapperFactory implements ObjectWrapperFactory { @Override public boolean hasWrapperFor(Object object) { return object != null && object instanceof Map; } @Override public ObjectWrapper getWrapperFor(MetaObject metaObject, Object object) { return new MyMapWrapper(metaObject, (Map) object); } } static class MyMapWrapper extends MapWrapper { MyMapWrapper(MetaObject metaObject, Map<String, Object> map) { super(metaObject, map); } @Override public String findProperty(String name, boolean useCamelCaseMapping) { if (useCamelCaseMapping && ((name.charAt(0) >= 'A' && name.charAt(0) <= 'Z') || name.contains("_"))) { return underlineToCamelhump(name); } return name; } /** * 將下劃線風格替換為駝峰風格 * * @param inputString * @return */ private String underlineToCamelhump(String inputString) { StringBuilder sb = new StringBuilder(); boolean nextUpperCase = false; for (int i = 0; i < inputString.length(); i++) { char c = inputString.charAt(i); if (c == '_') { if (sb.length() > 0) { nextUpperCase = true; } } else { if (nextUpperCase) { sb.append(Character.toUpperCase(c)); nextUpperCase = false; } else { sb.append(Character.toLowerCase(c)); } } } return sb.toString(); } } }
還需要配置
#下劃線轉駝峰
mybatis.configuration.map-underscore-to-camel-case=true
mybatis XML配置
<objectWrapperFactory type="tk.mybatis.MapWrapperFactory"/>
還需要
<settings>
<setting name="mapUnderscoreToCamelCase" value="true"/>
<!-- 其他配置 -->
</settings>