java，map工具类

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import java.util.Hashtable;
import java.util.Iterator;
import java.util.Map;
import java.util.Set;

public class MapUtil {
	public static String getString(Map<?, ?> paramMap, String paramString) {
		paramString = paramString.toLowerCase();
		Set localSet = paramMap.keySet();
		Iterator localIterator = localSet.iterator();
		Hashtable localHashtable = new Hashtable();
		while (localIterator.hasNext()) {
			String localObject = (String) localIterator.next();
			localHashtable.put(((String) localObject).toLowerCase(), localObject);
		}
		paramString = (String) localHashtable.get(paramString);
		Object localObject = paramMap.get(paramString);
		return localObject != null ? localObject.toString().trim() : "";
	}

	public static long getLong(Map<?, ?> paramMap, String paramString) {
		String str = getString(paramMap, paramString);
		if (str.equals("")) {
			return -1L;
		}
		return Long.parseLong(str);
	}

	public static int getInt(Map<?, ?> paramMap, String paramString) {
		String str = getString(paramMap, paramString);
		if (str.equals("")) {
			return -1;
		}
		return Integer.parseInt(str);
	}

	public static float getFloat(Map<?, ?> paramMap, String paramString) {
		String str = getString(paramMap, paramString);
		if (str.equals("")) {
			return -1.0F;
		}
		return Float.parseFloat(str);
	}

	public static double getDouble(Map<?, ?> paramMap, String paramString) {
		String str = getString(paramMap, paramString);
		if (str.equals("")) {
			return -1.0D;
		}
		return Double.parseDouble(str);
	}
}