Mybatis 返回resultType=“map“映射下划线转驼峰
Mybatis 返回resultType=“map“映射下划线转驼峰示例
<select id="getMyList" parameterType="map" resultType="map">1、增加如下配置类：
@Configuration
public class MybatisConfig {
/**
* mybatis resultType为map时下划线键值转小写驼峰形式插
*/
@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;
}
/**
* 将下划线风格替换为驼峰风格
*
* @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();
}
}
}