剛接收一個項目,項目原先是基於oracle的,項目裏面有一個webservice 直接經過sqlmapclient 來獲取數據庫的,可是oracle ,經過ibatis調用取得的map,元數據都是大寫的,如今項目要支持多種數據庫,例如MySQL、postgresql等數據庫,元數據是小寫的,經過參考spring框架,採用map進行轉換成 LinkedCaseInsensitiveMap 來實現,原先框架用xfire實現的webservice,想直接引入spring的包,發現有衝突,後面把這個LinkedCaseInsensitiveMap的源媽引入,解決了。java
@SuppressWarnings("serial")
public class LinkedCaseInsensitiveMap<V> extends LinkedHashMap<String, V> {web
private final Map<String, String> caseInsensitiveKeys;spring
private final Locale locale;sql
/**
* Create a new LinkedCaseInsensitiveMap for the default Locale.
* @see java.lang.String#toLowerCase()
*/
public LinkedCaseInsensitiveMap() {
this(null);
}數據庫
/**
* Create a new LinkedCaseInsensitiveMap that stores lower-case keys
* according to the given Locale.
* @param locale the Locale to use for lower-case conversion
* @see java.lang.String#toLowerCase(java.util.Locale)
*/
public LinkedCaseInsensitiveMap(Locale locale) {
super();
this.caseInsensitiveKeys = new HashMap<String, String>();
this.locale = (locale != null ? locale : Locale.getDefault());
}oracle
/**
* Create a new LinkedCaseInsensitiveMap that wraps a {@link LinkedHashMap}
* with the given initial capacity and stores lower-case keys according
* to the default Locale.
* @param initialCapacity the initial capacity
* @see java.lang.String#toLowerCase()
*/
public LinkedCaseInsensitiveMap(int initialCapacity) {
this(initialCapacity, null);
}框架
/**
* Create a new LinkedCaseInsensitiveMap that wraps a {@link LinkedHashMap}
* with the given initial capacity and stores lower-case keys according
* to the given Locale.
* @param initialCapacity the initial capacity
* @param locale the Locale to use for lower-case conversion
* @see java.lang.String#toLowerCase(java.util.Locale)
*/
public LinkedCaseInsensitiveMap(int initialCapacity, Locale locale) {
super(initialCapacity);
this.caseInsensitiveKeys = new HashMap<String, String>(initialCapacity);
this.locale = (locale != null ? locale : Locale.getDefault());
}ide
@Override
public V put(String key, V value) {
String oldKey = this.caseInsensitiveKeys.put(convertKey(key), key);
if (oldKey != null && !oldKey.equals(key)) {
super.remove(oldKey);
}
return super.put(key, value);
}post
@Override
public void putAll(Map<? extends String, ? extends V> map) {
if (map.isEmpty()) {
return;
}
for (Map.Entry<? extends String, ? extends V> entry : map.entrySet()) {
put(entry.getKey(), entry.getValue());
}
}this
@Override
public boolean containsKey(Object key) {
return (key instanceof String && this.caseInsensitiveKeys.containsKey(convertKey((String) key)));
}
@Override
public V get(Object key) {
if (key instanceof String) {
return super.get(this.caseInsensitiveKeys.get(convertKey((String) key)));
}
else {
return null;
}
}
@Override
public V remove(Object key) {
if (key instanceof String ) {
return super.remove(this.caseInsensitiveKeys.remove(convertKey((String) key)));
}
else {
return null;
}
}
@Override
public void clear() {
this.caseInsensitiveKeys.clear();
super.clear();
}
/** * Convert the given key to a case-insensitive key. * <p>The default implementation converts the key * to lower-case according to this Map's Locale. * @param key the user-specified key * @return the key to use for storing * @see java.lang.String#toLowerCase(java.util.Locale) */ protected String convertKey(String key) { return key.toLowerCase(this.locale); }}