mybatis 返回Map类型key改为小写的操作

<select id="getStudentList" resultType="java.util.Map">
select t.name as "sName",t.sex as "sSex"
 from student
</select>

package org.springframework.util;
 
import java.util.HashMap;
import java.util.Iterator;
import java.util.LinkedHashMap;
import java.util.Locale;
import java.util.Map;
import java.util.Map.Entry;
 
public class LinkedCaseInsensitiveMap<V> extends LinkedHashMap<String, V> {
 private Map<String, String> caseInsensitiveKeys;
 private final Locale locale;
 
 public LinkedCaseInsensitiveMap() {
 this((Locale)null);
 }
 
 public LinkedCaseInsensitiveMap(Locale locale) {
 this.caseInsensitiveKeys = new HashMap();
 this.locale = locale != null?locale:Locale.getDefault();
 }
 
 public LinkedCaseInsensitiveMap(int initialCapacity) {
 this(initialCapacity, (Locale)null);
 }
 
 public LinkedCaseInsensitiveMap(int initialCapacity, Locale locale) {
 super(initialCapacity);
 this.caseInsensitiveKeys = new HashMap(initialCapacity);
 this.locale = locale != null?locale:Locale.getDefault();
 }
 
 public V put(String key, V value) {
 String oldKey = (String)this.caseInsensitiveKeys.put(this.convertKey(key), key);
 if(oldKey != null && !oldKey.equals(key)) {
  super.remove(oldKey);
 }
 
 return super.put(key, value);
 }
 
 public void putAll(Map<? extends String, ? extends V> map) {
 if(!map.isEmpty()) {
  Iterator var2 = map.entrySet().iterator();
 
  while(var2.hasNext()) {
  Entry entry = (Entry)var2.next();
  this.put((String)entry.getKey(), entry.getValue());
  }
 
 }
 }
 
 public boolean containsKey(Object key) {
 return key instanceof String && this.caseInsensitiveKeys.containsKey(this.convertKey((String)key));
 }
 
 public V get(Object key) {
 if(key instanceof String) {
  String caseInsensitiveKey = (String)this.caseInsensitiveKeys.get(this.convertKey((String)key));
  if(caseInsensitiveKey != null) {
  return super.get(caseInsensitiveKey);
  }
 }
 
 return null;
 }
 
 public V getOrDefault(Object key, V defaultValue) {
 if(key instanceof String) {
  String caseInsensitiveKey = (String)this.caseInsensitiveKeys.get(this.convertKey((String)key));
  if(caseInsensitiveKey != null) {
  return super.get(caseInsensitiveKey);
  }
 }
 
 return defaultValue;
 }
 
 public V remove(Object key) {
 if(key instanceof String) {
  String caseInsensitiveKey = (String)this.caseInsensitiveKeys.remove(this.convertKey((String)key));
  if(caseInsensitiveKey != null) {
  return super.remove(caseInsensitiveKey);
  }
 }
 
 return null;
 }
 
 public void clear() {
 this.caseInsensitiveKeys.clear();
 super.clear();
 }
 
 public Object clone() {
 LinkedCaseInsensitiveMap copy = (LinkedCaseInsensitiveMap)super.clone();
 copy.caseInsensitiveKeys = new HashMap(this.caseInsensitiveKeys);
 return copy;
 }
 
 protected String convertKey(String key) {
 return key.toLowerCase(this.locale);
 }
}