收集的工具方法

package org.codehaus.jackson.util;import java.util.Map;import java.util.LinkedHashMap;/** * Singleton class that adds a simple first-level cache in front of * regular String.intern() functionality. This is done as a minor * performance optimization, to avoid calling native intern() method * in cases where same String is being interned multiple times. *<p> * Note: that this class extends {@link LinkedHashMap} is an implementation * detail -- no code should ever directly call Map methods. */@SuppressWarnings("serial")public final class InternCache    extends LinkedHashMap<String,String>{    /**     * Size to use is somewhat arbitrary, so let's choose something that's     * neither too small (low hit ratio) nor too large (waste of memory)     */    private final static int MAX_ENTRIES = 192;    public final static InternCache instance = new InternCache();    private InternCache() {        super(MAX_ENTRIES, 0.8f, true);    }    @Override    protected boolean removeEldestEntry(Map.Entry<String,String> eldest)    {        return size() > MAX_ENTRIES;    }    public synchronized String intern(String input)    {        String result = get(input);        if (result == null) {            result = input.intern();            put(result, result);        }        return result;    }}

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import java.util.HashMap;import java.util.Map;public class URLParamAnalysis {private Map<String, String> paramMap = new HashMap<String, String>();public void analysis(String url) {paramMap.clear();if (!"".equals(url)) {url = url.substring(url.indexOf('?') + 1);String paramaters[] = url.split("&");for (String param : paramaters) {String values[] = param.split("=");paramMap.put(values[0], values[1]);}}}public String getParam(String name) {return paramMap.get(name);}public static void main(String[] args) {String test = "name=helddlo&id=100";URLParamAnalysis urlAnalysis = new URLParamAnalysis();urlAnalysis.analysis(test);System.out.println("name = " + urlAnalysis.getParam("name"));System.out.println("id = " + urlAnalysis.getParam("id"));}}

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