java国际化代码(jsp)

      package com.fgr.cc;

import java.util.*;
	/**
	 * <p>Title: </p>
	 *
	 * <p>Description: 管理缓存</p>
	 * Deep blue 2008-11-28 think
	 * 可扩展的功能：当chche到内存溢出时必须清除掉最早期的一些缓存对象，这就要求对每个缓存对象保存创建时间
	 * <p>Copyright: Copyright (c) 2008</p>
	 *
	 * <p>Company: </p>
	 *
	 * @author Deepblue  2008-11-11
	 * @version 1.0
	 */
	public class CacheManager {
	    private static HashMap cacheMap = new HashMap();

	    //单实例构造方法
	    private CacheManager() {
	        super();
	    }
	    //获取布尔值的缓存
	    public static boolean getSimpleFlag(String key){
	        try{
	            return (Boolean) cacheMap.get(key);
	        }catch(NullPointerException e){
	            return false;
	        }
	    }
	    public static long getServerStartdt(String key){
	        try {
	            return (Long)cacheMap.get(key);
	        } catch (Exception ex) {
	            return 0;
	        }
	    }
	    //设置布尔值的缓存
	    public synchronized static boolean setSimpleFlag(String key,boolean flag){
	        if (flag && getSimpleFlag(key)) {//假如为真不允许被覆盖
	            return false;
	        }else{
	            cacheMap.put(key, flag);
	            return true;
	        }
	    }
	    public synchronized static boolean setSimpleFlag(String key,long serverbegrundt){
	        if (cacheMap.get(key) == null) {
	            cacheMap.put(key,serverbegrundt);
	            return true;
	        }else{
	            return false;
	        }
	    }


	    //得到缓存。同步静态方法
	    private synchronized static Cache getCache(String key) {
	        return (Cache) cacheMap.get(key);
	    }

	    //判断是否存在一个缓存
	    private synchronized static boolean hasCache(String key) {
	        return cacheMap.containsKey(key);
	    }

	    //清除所有缓存
	    public synchronized static void clearAll() {
	        cacheMap.clear();
	    }

	    //清除某一类特定缓存,通过遍历HASHMAP下的所有对象，来判断它的KEY与传入的TYPE是否匹配
	    public synchronized static void clearAll(String type) {
	        Iterator i = cacheMap.entrySet().iterator();
	        String key;
	        ArrayList<String> arr = new ArrayList<String>();
	        try {
	            while (i.hasNext()) {
	                java.util.Map.Entry entry = (java.util.Map.Entry) i.next();
	                key = (String) entry.getKey();
	                if (key.startsWith(type)) { //如果匹配则删除掉
	                    arr.add(key);
	                }
	            }
	            for (int k = 0; k < arr.size(); k++) {
	                clearOnly(arr.get(k));
	            }
	        } catch (Exception ex) {
	            ex.printStackTrace();
	        }
	    }

	    //清除指定的缓存
	    public synchronized static void clearOnly(String key) {
	        cacheMap.remove(key);
	    }

	    //载入缓存
	    public synchronized static void putCache(String key, Cache obj) {
	        cacheMap.put(key, obj);
	    }

	    //获取缓存信息
	    public static Cache getCacheInfo(String key) {

	        if (hasCache(key)) {
	            Cache cache = getCache(key);
	            if (cacheExpired(cache)) { //调用判断是否终止方法
	                cache.setExpired(true);
	            }
	            return cache;
	        }else
	            return null;
	    }

	    //载入缓存信息
	    public static void putCacheInfo(String key, Cache obj, long dt,boolean expired) {
	        Cache cache = new Cache();
	        cache.setKey(key);
	        cache.setTimeOut(dt + System.currentTimeMillis()); //设置多久后更新缓存
	        cache.setValue(obj);
	        cache.setExpired(expired); //缓存默认载入时，终止状态为FALSE
	        cacheMap.put(key, cache);
	    }
	    //重写载入缓存信息方法
	    public static void putCacheInfo(String key,Cache obj,long dt){
	        Cache cache = new Cache();
	        cache.setKey(key);
	        cache.setTimeOut(dt+System.currentTimeMillis());
	        cache.setValue(obj);
	        cache.setExpired(false);
	        cacheMap.put(key,cache);
	    }

	    //判断缓存是否终止
	    public static boolean cacheExpired(Cache cache) {
	        if (null == cache) { //传入的缓存不存在
	            return false;
	        }
	        long nowDt = System.currentTimeMillis(); //系统当前的毫秒数
	        long cacheDt = cache.getTimeOut(); //缓存内的过期毫秒数
	        if (cacheDt <= 0||cacheDt>nowDt) { //过期时间小于等于零时,或者过期时间大于当前时间时，则为FALSE
	            return false;
	        } else { //大于过期时间 即过期
	            return true;
	        }
	    }

	    //获取缓存中的大小
	    public static int getCacheSize() {
	        return cacheMap.size();
	    }

	    //获取指定的类型的大小
	    public static int getCacheSize(String type) {
	        int k = 0;
	        Iterator i = cacheMap.entrySet().iterator();
	        String key;
	        try {
	            while (i.hasNext()) {
	                java.util.Map.Entry entry = (java.util.Map.Entry) i.next();
	                key = (String) entry.getKey();
	                if (key.indexOf(type) != -1) { //如果匹配则删除掉
	                    k++;
	                }
	            }
	        } catch (Exception ex) {
	            ex.printStackTrace();
	        }

	        return k;
	    }

	    //获取缓存对象中的所有键值名称
	    public static ArrayList<String> getCacheAllkey() {
	        ArrayList a = new ArrayList();
	        try {
	            Iterator i = cacheMap.entrySet().iterator();
	            while (i.hasNext()) {
	                java.util.Map.Entry entry = (java.util.Map.Entry) i.next();
	                a.add((String) entry.getKey());
	            }
	        } catch (Exception ex) {} finally {
	            return a;
	        }
	    }

	    //获取缓存对象中指定类型 的键值名称
	    public static ArrayList<String> getCacheListkey(String type) {
	        ArrayList a = new ArrayList();
	        String key;
	        try {
	            Iterator i = cacheMap.entrySet().iterator();
	            while (i.hasNext()) {
	                java.util.Map.Entry entry = (java.util.Map.Entry) i.next();
	                key = (String) entry.getKey();
	                if (key.indexOf(type) != -1) {
	                    a.add(key);
	                }
	            }
	        } catch (Exception ex) {} finally {
	            return a;
	        }
	    }

	}