Mybatis 結果映射下划線轉駝峰

Spring Boot 配置:

#下划線轉駝峰
mybatis.configuration.map-underscore-to-camel-case=true

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mybatis XML 配置

<configuration> <!-- 全局配置 --> <settings> <!-- 是否開啟自動駝峰命名規則（camel case）映射，即從數據庫列名 A_COLUMN 到屬性名 aColumn 的類似映射 --> <setting name="mapUnderscoreToCamelCase" value="true"/> </settings> </configuration>

當resultTpye=map時，以上的配置無效

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通過實現ObjectWrapperFactory接口，可以判斷當object 是 Map 類型時，返回 true，然后在下面的 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時下划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; } /** * 將下划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

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#下划線轉駝峰
mybatis.configuration.map-underscore-to-camel-case=true

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mybatis XML配置

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<objectWrapperFactory type="tk.mybatis.MapWrapperFactory"/>

還需要

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<settings> <setting name="mapUnderscoreToCamelCase" value="true"/> <!-- 其他配置 --> </settings>