锘??xml version="1.0" encoding="utf-8" standalone="yes"?>亚洲欧洲第一a在线观看,香蕉视频在线观看亚洲,亚洲专区中文字幕http://www.tkk7.com/human2008/archive/2008/01/11/174507.html鐏?鐏?Fri, 11 Jan 2008 01:47:00 GMThttp://www.tkk7.com/human2008/archive/2008/01/11/174507.htmlhttp://www.tkk7.com/human2008/comments/174507.htmlhttp://www.tkk7.com/human2008/archive/2008/01/11/174507.html#Feedback0http://www.tkk7.com/human2008/comments/commentRss/174507.htmlhttp://www.tkk7.com/human2008/services/trackbacks/174507.htmlhttp://lucene.apache.org.鐩稿叧鐨勪竴涓」鐩槸杞︿笢鐨刉ebLucene: http://sourceforge.net/projects/weblucene.

 棣栧厛,鍩轟簬涓涓畝鍗曠殑鏂伴椈緋葷粺,瑕佹兂鍋氬叏鏂囨绱?鏂伴椈緋葷粺鐨勭鐞嗙瓑鍦ㄨ繖閲屼笉鍦ㄥ叿浣撴彁鍑?涓嬮潰鍒楀嚭鏂伴椈瀵硅薄鐨勭被:
 
 娉?紼嬪簭鐢ㄤ細鍒頒竴浜涘伐鍏風被,涓嶅湪姝ゅ垪鍑?鐢ㄦ埛鍙互鑷繁瀹炵幇.
 
 

  package com.jscud.website.newsinfo.bean;
  
  
  import java.sql.Timestamp;
  
  import com.jscud.util.DateTime;
  import com.jscud.util.StringFunc;
  import com.jscud.website.newsinfo.NewsConst;
  
  
  /**
   * 涓涓柊闂?
   *
   * @author scud(椋炰簯灝忎緺) http://www.jscud.com
   * 
   */
  public class NewsItem
  {
  
      private int nid; //鏂伴椈緙栧彿
  
      private int cid; //綾誨埆緙栧彿
  
      private String title;//鏍囬
  
      private int showtype; //鍐呭綾誨瀷:鐩墠鏀寔url鍜宧tml
  
      private String content;//鍐呭
  
      private String url;//瀵瑰簲緗戝潃,濡傛灉鍐呭綾誨瀷鏄痷rl鐨勮瘽
  
      private Timestamp addtime; //澧炲姞鏃墮棿
  
      private int click; //鐐瑰嚮鏁?br />      
      //瀵瑰簲鐨刧et,set鍑芥暟,杈冨涓嶅湪鍒楀嚭,鍙互浣跨敤宸ュ叿鐢熸垚
      //......
  
     
      /**
       * 鎸夌収綾誨瀷鏍煎紡鍖?br />        */
      public String getShowContent()
      {
          String sRes = content;
          if(showtype == NewsConst.ShowType_HTML)
          {
          }  
          return sRes;
      }
     
      public String getTarget()
      {
          if(showtype == NewsConst.ShowType_URL)
          {
              return "_blank";
          }
          else
              return "";       
      }
     
      /**
       * 闈欐丠tml鏂囦歡鐨勮礬寰勫強鍏跺悕瀛?br />        */
      public String getHtmlFileName()
      {
          int nYear = DateTime.getYear_Date(getAddtime());
          int nMonth =  DateTime.getMonth_Date(getAddtime());
             
          String sGeneFileName =
             "/news/" + getCid() + "/" + nYear + "/" + nMonth +"/" + getNid() + ".htm";
         
          return sGeneFileName;
      }
     
      /**
       * 闈欐丠tml鏂囦歡鐨勮礬寰?br />        */
      public String getHtmlFilePath()
      {
          int nYear = DateTime.getYear_Date(getAddtime());
          int nMonth =  DateTime.getMonth_Date(getAddtime());
             
          String sGeneFilePath =
             getCid() + "_" + nYear + "_" + nMonth;
         
          return sGeneFilePath;
      }     
  } 


 
 鍙互鐪嬪埌,鎴戜滑闇瑕佸鏍囬鍜屽唴瀹硅繘琛屾绱?涓轟簡榪欎釜鐩殑,鎴戜滑棣栧厛闇瑕佹潵鐮旂┒涓涓媗ucene.
 
 鍦↙ucene涓?濡傛灉瑕佽繘琛屽叏鏂囨绱?蹇呴』瑕佸厛寤虹珛绱㈠紩鐒跺悗鎵嶈兘榪涜媯绱?褰撶劧瀹為檯宸ヤ綔涓繕浼氭湁鍒犻櫎绱㈠紩鍜屾洿鏂扮儲寮曠殑宸ヤ綔.
 
 鍦ㄦ涔嬪墠,浠嬬粛涓涓渶鍩烘湰鐨勭被(鎽樻妱鑷?a href="http://www.tkk7.com/cap/archive/2005/07/17/7849.html">http://www.tkk7.com/cap/archive/2005/07/17/7849.html):
 
 Analyzer 鏂囦歡鐨勫垎鏋愬櫒錛堝惉璧鋒潵鍒壄錛岃繕鏄彨Analyzer濂戒簡)鐨勬娊璞★紝榪欎釜綾葷敤鏉ュ鐞嗗垎璇?瀵逛腑鏂囧挨鍏墮噸瑕侊紝杞崲澶у皬鍐?Computer->computer,瀹炵幇鏌ヨ澶у皬鍐欐棤鍏?錛岃漿鎹㈣瘝鏍?computers->computer),娑堥櫎stop words絳?榪樿礋璐ｆ妸鍏朵粬鏍煎紡鏂囨。杞崲涓虹函鏂囨湰絳?
 
 鍦╨ucene涓?涓鑸細浣跨敤StandardAnalyzer鏉ュ垎鏋愬唴瀹?瀹冩敮鎸佷腑鏂囩瓑澶氬瓧鑺傝璦,褰撶劧鍙互鑷繁瀹炵幇鐗規畩鐨勮В鏋愬櫒.StandardAnalyzer鐩墠瀵逛腑鏂囩殑澶勭悊鏄寜鐓у崟瀛楁潵澶勭悊鐨?榪欐槸鏈綆鍗曠殑鍔炴硶,浣嗘槸涔熸湁緙虹偣,浼氱粍鍚堝嚭涓浜涙病鏈夋剰涔夌殑緇撴灉鏉? 
 
 
 棣栧厛鎴戜滑鏉ヤ簡瑙ｅ緩绔嬬儲寮?寤虹珛绱㈠紩鍖呭惈2縐嶆儏鍐?涓縐嶆槸緇欎竴鏉℃柊闂誨緩绔嬬儲寮?鍙﹀鐨勬儏鍐墊槸鍦ㄥ紑濮嬫垨鑰呬竴瀹氱殑鏃墮棿緇欐壒閲忕殑鏂伴椈寤虹珛绱㈠紩,鎵浠ヤ負浜嗛氱敤,鎴戜滑鍐欎竴涓氱敤鐨勫緩绔嬬儲寮曠殑鍑芥暟:
 
 (涓鑸竴綾葷殑绱㈠紩閮芥斁鍦ㄤ竴涓洰褰曚笅,榪欎釜閰嶇疆鍙互鍦ㄥ嚱鏁頒腑瀹氫箟,涔熷彲浠ュ啓鍦ㄩ厤緗枃浠朵腑,閫氳繃鍙傛暟浼犻掔粰鍑芥暟.)

    /**
     * 鐢熸垚绱㈠紩.
     *
     * @param doc 鐩爣鏂囨。
     * @param indexDir 绱㈠紩鐩綍
     */
    public static void makeIndex(Document doc, String indexDir)
    {
        List aList = new ArrayList();
        aList.add(doc);
        makeIndex(aList, indexDir);
    }
 
    /**
     * 鐢熸垚绱㈠紩.
     *
     * @param doc 鐢熸垚鐨刣ocument.
     * @param indexDir 绱㈠紩鐩綍
     */
    public static void makeIndex(List docs, String indexDir)
    {
        if (null == docs)
        {
            return;
        }       
        boolean indexExist = indexExist(indexDir);

        IndexWriter writer = null;
        try
        {
            StandardAnalyzer analyzer = new StandardAnalyzer();
           
            //濡傛灉绱㈠紩瀛樺湪,灝辮拷鍔?濡傛灉涓嶅瓨鍦?灝卞緩绔嬫柊鐨勭儲寮?lucene瑕佹槸鑷姩鍒ゅ喅灝卞ソ浜?
            if(indexExist)
            {
                writer = new IndexWriter(indexDir, analyzer, false);
            }
            else
            {
                writer = new IndexWriter(indexDir, analyzer, true);
            }

            //娣誨姞涓鏉℃枃妗?br />             for (int i = 0; i < docs.size(); i++)
            {
                Document doc = (Document) docs.get(i);
                if (null != doc)
                {
                    writer.addDocument(doc);
                }
            }

            //绱㈠紩瀹屾垚鍚庣殑澶勭悊
            writer.optimize();
        }
        catch (IOException e)
        {
            LogMan.warn("Error in Make Index", e);
        }
        finally
        {
            try
            {
                if (null != writer)
                {
                    writer.close();
                }
            }
            catch (IOException e)
            {
                LogMan.warn("Close writer Error");
            }
        }
    }



 鍙互鐪嬪埌,寤虹珛绱㈠紩鐢ㄥ埌綾繪槸IndexWrite,瀹冨彲浠ユ柊寤虹儲寮曟垨鑰呰拷鍔犵儲寮?浣嗘槸闇瑕佽嚜宸卞垽鏂?鍒ゆ柇鏄氳繃IndexReader榪欎釜綾繪潵瀹炵幇鐨?鍑芥暟濡備笅:

 

  /**
     * 媯鏌ョ儲寮曟槸鍚﹀瓨鍦?
     * @param indexDir
     * @return
     */
    public static boolean indexExist(String indexDir)
    {
        return IndexReader.indexExists(indexDir);
    }
 


 濡傛灉姣忔閮芥槸鏂板緩绱㈠紩鐨勮瘽,浼氭妸鍘熸潵鐨勮褰曞垹闄?鎴戝湪浣跨敤鐨勬椂鍊欎竴寮濮嬪氨娌℃湁娉ㄦ剰鍒?鍚庢潵瑙傚療浜嗕竴涓嬬儲寮曟枃浠?鎵嶅彂鐜拌繖涓棶棰?
 
 
 榪樺彲浠ョ湅鍒?寤虹珛绱㈠紩鏄粰鐢ㄦ埛鐨凞ocument瀵硅薄寤虹珛绱㈠紩,Document琛ㄧず绱㈠紩涓殑涓鏉℃枃妗ｈ褰?閭ｄ箞鎴戜滑濡備綍寤虹珛涓涓枃妗ｉ偅?浠ユ柊闂葷郴緇熶負渚?浠ｇ爜濡備笅:
 

     /**
      * 鐢熸垚鏂伴椈鐨凞ocument.
      *
      * @param aNews 涓鏉℃柊闂?
      *
      * @return lucene鐨勬枃妗ｅ璞?br />       */
     public static Document makeNewsSearchDocument(NewsItem aNews)
     {
         Document doc = new Document();
 
         doc.add(Field.Keyword("nid", String.valueOf(aNews.getNid())));
 
         doc.add(Field.Text("title", aNews.getTitle()));
        
         //瀵笻tml榪涜瑙ｆ瀽,濡傛灉涓嶆槸html,鍒欎笉闇瑕佽В鏋?鎴栬呮牴鎹牸寮忚皟鐢ㄨ嚜宸辯殑瑙ｆ瀽鏂規硶
         String content = parseHtmlContent(aNews.getContent());
 
         doc.add(Field.UnStored("content", content));
 
         doc.add(Field.Keyword("addtime", aNews.getAddtime()));
 
         //鍙互鍔犲叆鍏朵粬鐨勫唴瀹?渚嬪鏂伴椈鐨勮瘎璁虹瓑
         doc.add(Field.UnStored("other", ""));
 
         //璁塊棶url
         String newsUrl = "/srun/news/viewhtml/" + aNews.getHtmlFilePath() + "/" + aNews.getNid()
                         + ".htm";
 
         doc.add(Field.UnIndexed("visiturl", newsUrl));
 
         return doc;
     }


 
 閫氳繃涓婇潰鐨勪唬鐮?鎴戜滑鎶婁竴鏉℃柊闂昏漿鎹負lucene鐨凞ocument瀵硅薄,浠庤岃繘琛岀儲寮曞伐浣?鍦ㄤ笂闈㈢殑浠ｇ爜涓?鎴戜滑鍙堝紩鍏ヤ簡lucene涓殑Field(瀛楁)綾?Document鏂囨。灝卞儚鏁版嵁搴撲腑鐨勪竴鏉¤褰?瀹冩湁寰堝瀛楁,姣忎釜瀛楁鏄竴涓狥ield瀵硅薄.
 
 浠庡埆鐨勬枃绔犳憳鎶勪竴孌靛叧浜嶧ield鐨勮鏄?鎽樻妱鑷?a href="http://www.tkk7.com/cap/archive/2005/07/17/7849.html">http://www.tkk7.com/cap/archive/2005/07/17/7849.html):
 [quote]
    綾誨瀷                               Analyzed Indexed Stored 璇存槑
    Field.Keyword(String,String/Date)  N Y Y                    榪欎釜Field鐢ㄦ潵鍌ㄥ瓨浼氱洿鎺ョ敤鏉ユ绱㈢殑姣斿(緙栧彿,濮撳悕,鏃ユ湡絳?
    Field.UnIndexed(String,String)     N N Y                    涓嶄細鐢ㄦ潵媯绱㈢殑淇℃伅,浣嗘槸媯绱㈠悗闇瑕佹樉紺虹殑,姣斿,紜歡搴忓垪鍙?鏂囨。鐨剈rl鍦板潃
    Field.UnStored(String,String)      Y Y N                    澶ф鏂囨湰鍐呭,浼氱敤鏉ユ绱?浣嗘槸媯绱㈠悗涓嶉渶瑕佷粠index涓彇鍐呭,鍙互鏍規嵁url鍘籰oad鐪熷疄鐨勫唴瀹?
    Field.Text(String,String)          Y Y Y                    媯绱?鑾峰彇閮介渶瑕佺殑鍐呭,鐩存帴鏀緄ndex涓?涓嶈繃榪欐牱浼氬澶ndex
    Field.Text(String,Reader)          Y Y N                    濡傛灉鏄竴涓猂eader, lucene鐚滄祴鍐呭姣旇緝澶?浼氶噰鐢║nstored鐨勭瓥鐣?
 [/quote]
 
 鎴戜滑鍙互鐪嬪埌鏂伴椈鐨勭紪鍙鋒槸鐩存帴鐢ㄦ潵媯绱㈢殑,鎵浠ユ槸Keyword綾誨瀷鐨勫瓧孌?鏂伴椈鐨勬爣棰樻槸闇瑕佹绱㈠拰鏄劇ず鐢ㄧ殑,鎵浠ユ槸Text綾誨瀷,鑰屾柊闂葷殑鍐呭鍥犱負鏄疕tml鏍煎紡鐨?鎵浠ュ湪緇忚繃瑙ｆ瀽鍣ㄧ殑澶勭悊鐢?浣跨敤鐨刄nStored鐨勬牸寮?鑰屾柊闂葷殑鏃墮棿鏄洿鎺ョ敤鏉ユ绱㈢殑,鎵浠ユ槸KeyWord綾誨瀷.涓轟簡鍦ㄦ柊闂葷儲寮曞悗鐢ㄦ埛鍙互璁塊棶鍒板畬鏁寸殑鏂伴椈欏甸潰,榪樿緗簡涓涓猆nIndexed綾誨瀷鐨勮闂湴鍧瀛楁.
 
 (瀵笻tml榪涜瑙ｆ瀽鐨勫鐞嗙◢鍚庡湪榪涜璁茶В)
 
 涓轟竴鏉℃柊闂誨緩绔嬬儲寮曢渶瑕佷袱涓楠?鑾峰彇Document,浼犵粰makeIndex鍑芥暟,浠ｇ爜濡備笅:

    public static void makeNewsInfoIndex(NewsItem aNews)
    {
        if (null == aNews)
        {
            return;
        }
        makeIndex(makeNewsSearchDocument(aNews),indexDir);
    }  


 

 
 
 寤虹珛绱㈠紩鐨勫伐浣滃氨榪涜瀹屼簡,鍙鍦ㄥ鍔犳柊闂誨悗璋冪敤 makeNewsInfoIndex(newsitem); 灝卞彲浠ュ緩绔嬬儲寮曚簡.
 
 濡傛灉闇瑕佸垹闄ゆ柊闂?閭ｄ箞涔熻鍒犻櫎瀵瑰簲鐨勭儲寮?鍒犻櫎绱㈠紩鏄氳繃IndexReader綾繪潵瀹屾垚鐨?
 


    /**
     * 鍒犻櫎绱㈠紩.
     * @param aTerm 绱㈠紩鍒犻櫎鏉′歡
     * @param indexDir 绱㈠紩鐩綍
     */
    public static void deleteIndex(Term aTerm, String indexDir)
    {
        List aList = new ArrayList();
        aList.add(aTerm);
        deleteIndex(aList, indexDir);
    }

    /**
     * 鍒犻櫎绱㈠紩.
     *
     * @param aTerm 绱㈠紩鍒犻櫎鏉′歡.
     * @param indexDir 绱㈠紩鐩綍
     * 
     */
    public static void deleteIndex(List terms, String indexDir)
    {
        if (null == terms)
        {
            return;
        }
       
        if(!indexExist(indexDir)) { return; }

        IndexReader reader = null;
        try
        {
            reader = IndexReader.open(indexDir);
            for (int i = 0; i < terms.size(); i++)
            {
                Term aTerm = (Term) terms.get(i);
                if (null != aTerm)
                {
                    reader.delete(aTerm);
                }
            }
        }
        catch (IOException e)
        {
            LogMan.warn("Error in Delete Index", e);
        }
        finally
        {
            try
            {
                if (null != reader)
                {
                    reader.close();
                }
            }
            catch (IOException e)
            {
                LogMan.warn("Close reader Error");
            }
        }
    } 


 
 鍒犻櫎绱㈠紩闇瑕佷竴涓潯浠?綾諱技鏁版嵁搴撲腑鐨勫瓧孌墊潯浠?渚嬪鍒犻櫎涓鏉℃柊闂葷殑浠ｇ爜濡備笅:
 

     public static void deleteNewsInfoIndex(int nid)
     {
         Term aTerm = new Term("nid", String.valueOf(nid));
         deleteIndex(aTerm,indexDir);
     }   




 閫氳繃鏂伴椈鐨処D,灝卞彲浠ュ垹闄や竴鏉℃柊闂?
 
 濡傛灉闇瑕佹洿鏂版柊闂?濡備綍鏇存柊绱㈠紩鍝? 鏇存柊绱㈠紩闇瑕佸厛鍒犻櫎绱㈠紩鐒跺悗鏂板緩绱㈠紩2涓楠?鍏跺疄灝辨槸鎶婁笂闈㈢殑浠ｇ爜緇勫悎璧鋒潵,渚嬪鏇存柊涓鏉℃柊闂?

     public static void updateNewsInfoIndex(NewsItem aNews)
     {
         if (null == aNews)
         {
             return;
         }
         deleteNewsInfoIndex(aNews.getNid());
         makeNewsInfoIndex(aNews);
     } 
 



 
 鑷蟲,绱㈠紩鐨勫緩绔嬫洿鏂板拰鍒犻櫎灝卞憡涓孌佃惤浜?鍏朵腑鎵歸噺鏇存柊鏂伴椈鐨勪唬鐮佸涓?
 (鎵歸噺鏇存柊搴旇鍦ㄨ闂漢鏁板皯鎴栬呭悗鍙扮▼搴忓湪澶滈棿鎵ц)

    public static void makeAllNewsInfoIndex(List newsList)
    {
        List terms = new ArrayList();
        List docs = new ArrayList();

        for (int i = 0; i < newsList.size(); i++)
        {
            NewsItem aitem = (NewsItem) newsList.get(i);
            if (null != aitem)
            {
                terms.add(new Term("nid", String.valueOf(aitem.getNid())));
                docs.add(makeNewsSearchDocument(aitem));
            }
        }

        deleteIndex(terms,indexDir);
        makeIndex(docs,indexDir);
    } 



鐏? 2008-01-11 09:47 鍙戣〃璇勮
]]>姹夊瓧緙栫爜杞崲 http://www.tkk7.com/human2008/archive/2008/01/10/174233.html鐏?鐏?Thu, 10 Jan 2008 03:46:00 GMThttp://www.tkk7.com/human2008/archive/2008/01/10/174233.htmlhttp://www.tkk7.com/human2008/comments/174233.htmlhttp://www.tkk7.com/human2008/archive/2008/01/10/174233.html#Feedback0http://www.tkk7.com/human2008/comments/commentRss/174233.htmlhttp://www.tkk7.com/human2008/services/trackbacks/174233.html

姹夊瓧緙栫爜杞崲

鐩稿叧錛?/span>

UNICODE 鏄負浜嗗鐞嗗寘鎷腑鏂囷紝鏃ユ枃絳夊瓧絎﹁屾彁鍑虹殑涓縐嶉氱敤鐨勫瓧絎﹂泦銆傛渶鍒濈殑UNICODE涓哄弻瀛楄妭瀛楃闆嗭紝鍗?6浣嶇紪鐮侊紝鑳藉鍖呮嫭65錛?36涓瓧絎︺備絾榪欐牱鐨勫閲忓茍涓嶈兘婊¤凍鎵鏈夐渶瑕侊紝鍥犳錛岀幇鍦ㄧ殑UNICODE宸茬粡鎵╁睍鍒?涓瓧鑺傦紝鑳藉瀹圭撼1,112,064 涓瓧絎︼紝鑰岃繖浜涘湪16浣嶄箣鍚庣殑鎵╁睍鑳岀О涓哄琛ュ瓧絎︺?/span>

UTF-32 銆?/span> UTF-16 鍜?/span> UTF-8 鏄?/span> Unicode 鏍囧噯鐨勭紪鐮佸瓧絎﹂泦鐨勫瓧絎︾紪鐮佹柟妗堛?/span>

UTF-8 浣跨敤涓鑷沖洓涓瓧鑺傜殑搴忓垪瀵圭紪鐮?/span> Unicode 浠ｇ爜鐐硅繘琛岀紪鐮?/span>

UTF-8 浣跨敤涓鑷沖洓涓瓧鑺傜殑搴忓垪瀵圭紪鐮?Unicode 浠ｇ爜鐐硅繘琛岀紪鐮併俇+0000 鑷?U+007F 浣跨敤涓涓瓧鑺傜紪鐮侊紝U+0080 鑷?U+07FF 浣跨敤涓や釜瀛楄妭錛孶+0800 鑷?U+FFFF 浣跨敤涓変釜瀛楄妭錛岃?U+10000 鑷?U+10FFFF 浣跨敤鍥涗釜瀛楄妭銆俇TF-8 璁捐鍘熺悊涓猴細瀛楄妭鍊?0x00 鑷?0x7F 濮嬬粓琛ㄧず浠ｇ爜鐐?U+0000 鑷?U+007F錛圔asic Latin 瀛楃瀛愰泦錛屽畠瀵瑰簲 ASCII 瀛楃闆嗭級銆傝繖浜涘瓧鑺傚兼案榪滀笉浼氳〃紺哄叾浠栦唬鐮佺偣錛岃繖涓鐗規т嬌 UTF-8 鍙互寰堟柟渚垮湴鍦ㄨ蔣浠朵腑灝嗙壒孌婄殑鍚箟璧嬩簣鏌愪簺 ASCII 瀛楃銆?/span>

銆 GB2312(1980 騫?/span> ) 涓鍏辨敹褰曚簡 7445 涓瓧絎︼紝鍖呮嫭 6763 涓眽瀛楀拰 682 涓叾瀹冪鍙楓傛眽瀛楀尯鐨勫唴鐮佽寖鍥撮珮瀛楄妭浠?/span> B0-F7 錛屼綆瀛楄妭浠?/span> A1-FE 錛屽崰鐢ㄧ殑鐮佷綅鏄?/span> 72*94=6768 銆傚叾涓湁 5 涓┖浣嶆槸 D7FA-D7FE 銆傚綋鐒朵篃鍙互琛ㄧず鏁板瓧鍜屽瓧絎︼紙涓涓瓧鑺傦紝涓?/span> ASCII 琛ㄧず鐩稿悓錛夈?/span>

瑕佽鍙栦竴涓互 GB2312 緙栫爜鐨勫寘鍚眽瀛椼佹暟瀛椼佸瓧姣嶇殑浜岃繘鍒舵枃浠躲?/span>

String strName =Encoding.GetEncoding("gb2312").GetString(name,0,i) ;

鏄鍙栫殑浜岃繘鍒舵暟緇勩?/span>

姹夊瓧銆佹暟瀛楁垨瀛楁瘝

鍚屾牱錛氫篃鍙互灝嗗寘鍚眽瀛椼佹暟瀛椼佸瓧姣嶇殑瀛楃涓茶漿鎹負 浜岃繘鍒舵枃浠躲?/span>

Byte[] encodedBytes = Encoding.GetEncoding("gb2312").GetBytes(unicodeString);

褰撶劧涔熷彲浠ヨ繘琛屼簩榪涘埗鏁扮粍涓嶶NICODE錛孶TF-8絳夌紪鐮佹柟寮忕殑杞崲

Byte[] encodedBytes = utf8.GetBytes(unicodeString);

String decodedString = utf8.GetString(encodedBytes);

UnicodeEncoding unicode = new UnicodeEncoding();

Byte[] encodedBytes = unicode.GetBytes(unicodeString);



鐏? 2008-01-10 11:46 鍙戣〃璇勮
]]>JAVA鏁版嵁綾誨瀷杞崲 http://www.tkk7.com/human2008/archive/2008/01/10/174224.html鐏?鐏?Thu, 10 Jan 2008 03:38:00 GMThttp://www.tkk7.com/human2008/archive/2008/01/10/174224.htmlhttp://www.tkk7.com/human2008/comments/174224.htmlhttp://www.tkk7.com/human2008/archive/2008/01/10/174224.html#Feedback0http://www.tkk7.com/human2008/comments/commentRss/174224.htmlhttp://www.tkk7.com/human2008/services/trackbacks/174224.html鍩烘湰綾誨瀷鏈変互涓嬪洓縐嶏細
int闀垮害鏁版嵁綾誨瀷鏈夛細byte(8bits)銆乻hort(16bits)銆乮nt(32bits)銆乴ong(64bits)銆?br /> float闀垮害鏁版嵁綾誨瀷鏈夛細鍗曠簿搴︼紙32bits float錛夈佸弻綺懼害錛?4bits double錛?br /> boolean綾誨瀷鍙橀噺鐨勫彇鍊兼湁錛歵ure銆乫alse
char鏁版嵁綾誨瀷鏈夛細unicode瀛楃,16浣?br /> 瀵瑰簲鐨勭被綾誨瀷錛?br /> Integer銆丗loat銆丅oolean銆丆haracter銆丏ouble銆丼hort銆丅yte銆丩ong


杞崲鍘熷垯錛?br /> 浠庝綆綺懼害鍚戦珮綺懼害杞崲
byte 銆乻hort銆乮nt銆乴ong銆乫loat銆乨ouble銆乧har
娉細涓や釜char鍨嬭繍綆楁椂錛岃嚜鍔ㄨ漿鎹負int鍨嬶紱褰揷har涓庡埆鐨勭被鍨嬭繍綆楁椂錛屼篃浼氬厛鑷姩杞崲涓篿nt鍨嬬殑錛屽啀鍋氬叾瀹冪被鍨嬬殑鑷姩杞崲

鍩烘湰綾誨瀷鍚戠被綾誨瀷杞崲

姝ｅ悜杞崲錛?br /> 閫氳繃綾誨寘瑁呭櫒鏉ew鍑轟竴涓柊鐨勭被綾誨瀷鐨勫彉閲?br /> Integer a= new Integer(2);

鍙嶅悜杞崲錛?br /> 閫氳繃綾誨寘瑁呭櫒鏉ヨ漿鎹?br /> int b=a.intValue();
綾葷被鍨嬪悜瀛楃涓茶漿鎹?/p>


姝ｅ悜杞崲錛?br /> 鍥犱負姣忎釜綾婚兘鏄痮bject綾葷殑瀛愮被錛岃屾墍鏈夌殑object綾婚兘鏈変竴涓猼oString()鍑芥暟錛屾墍浠ラ氳繃toString()鍑芥暟鏉ヨ漿鎹㈠嵆鍙?/p>

鍙嶅悜杞崲錛?br /> 閫氳繃綾誨寘瑁呭櫒new鍑轟竴涓柊鐨勭被綾誨瀷鐨勫彉閲?br /> eg1: int i=Integer.valueOf(“123”).intValue()
璇存槑錛氫笂渚嬫槸灝嗕竴涓瓧絎︿覆杞寲鎴愪竴涓狪nteger瀵硅薄錛岀劧鍚庡啀璋冪敤榪欎釜瀵硅薄鐨刬ntValue()鏂規硶榪斿洖鍏跺搴旂殑int鏁板箋?br /> eg2: float f=Float.valueOf(“123”).floatValue()
璇存槑錛氫笂渚嬫槸灝嗕竴涓瓧絎︿覆杞寲鎴愪竴涓狥loat瀵硅薄錛岀劧鍚庡啀璋冪敤榪欎釜瀵硅薄鐨刦loatValue()鏂規硶榪斿洖鍏跺搴旂殑float鏁板箋?br /> eg3: boolean b=Boolean.valueOf(“123”).booleanValue()
璇存槑錛氫笂渚嬫槸灝嗕竴涓瓧絎︿覆杞寲鎴愪竴涓狟oolean瀵硅薄錛岀劧鍚庡啀璋冪敤榪欎釜瀵硅薄鐨刡ooleanValue()鏂規硶榪斿洖鍏跺搴旂殑boolean鏁板箋?br /> eg4:Double d=Double.valueOf(“123”).doubleValue()
璇存槑錛氫笂渚嬫槸灝嗕竴涓瓧絎︿覆杞寲鎴愪竴涓狣ouble瀵硅薄錛岀劧鍚庡啀璋冪敤榪欎釜瀵硅薄鐨刣oubleValue()鏂規硶榪斿洖鍏跺搴旂殑double鏁板箋?br /> eg5: long l=Long.valueOf(“123”).longValue()
璇存槑錛氫笂渚嬫槸灝嗕竴涓瓧絎︿覆杞寲鎴愪竴涓狶ong瀵硅薄錛岀劧鍚庡啀璋冪敤榪欎釜瀵硅薄鐨刲ongValue()鏂規硶榪斿洖鍏跺搴旂殑long鏁板箋?br /> eg6: char=Character.valueOf(“123”).charValue()
璇存槑錛氫笂渚嬫槸灝嗕竴涓瓧絎︿覆杞寲鎴愪竴涓狢haracter瀵硅薄錛岀劧鍚庡啀璋冪敤榪欎釜瀵硅薄鐨刢harValue()鏂規硶榪斿洖鍏跺搴旂殑char鏁板箋?/p>


鍩烘湰綾誨瀷鍚戝瓧絎︿覆鐨勮漿鎹?/p>

姝ｅ悜杞崲錛?br /> 濡傦細int a=12;
String b;
b=a+””;

鍙嶅悜杞崲錛?br /> 閫氳繃綾誨寘瑁呭櫒
eg1:
int i=Integer.parseInt(“123”)
璇存槑錛氭鏂規硶鍙兘閫傜敤浜庡瓧絎︿覆杞寲鎴愭暣鍨嬪彉閲?br /> eg2: float f=Float.valueOf(“123”).floatValue()
璇存槑錛氫笂渚嬫槸灝嗕竴涓瓧絎︿覆杞寲鎴愪竴涓狥loat瀵硅薄錛岀劧鍚庡啀璋冪敤榪欎釜瀵硅薄鐨刦loatValue()鏂規硶榪斿洖鍏跺搴旂殑float鏁板箋?br /> eg3: boolean b=Boolean.valueOf(“123”).booleanValue()
璇存槑錛氫笂渚嬫槸灝嗕竴涓瓧絎︿覆杞寲鎴愪竴涓狟oolean瀵硅薄錛岀劧鍚庡啀璋冪敤榪欎釜瀵硅薄鐨刡ooleanValue()鏂規硶榪斿洖鍏跺搴旂殑boolean鏁板箋?br /> eg4:Double d=Double.valueOf(“123”).doubleValue()
璇存槑錛氫笂渚嬫槸灝嗕竴涓瓧絎︿覆杞寲鎴愪竴涓狣ouble瀵硅薄錛岀劧鍚庡啀璋冪敤榪欎釜瀵硅薄鐨刣oubleValue()鏂規硶榪斿洖鍏跺搴旂殑double鏁板箋?br /> eg5: long l=Long.valueOf(“123”).longValue()
璇存槑錛氫笂渚嬫槸灝嗕竴涓瓧絎︿覆杞寲鎴愪竴涓狶ong瀵硅薄錛岀劧鍚庡啀璋冪敤榪欎釜瀵硅薄鐨刲ongValue()鏂規硶榪斿洖鍏跺搴旂殑long鏁板箋?br /> eg6: char=Character.valueOf(“123”).charValue()
璇存槑錛氫笂渚嬫槸灝嗕竴涓瓧絎︿覆杞寲鎴愪竴涓狢haracter瀵硅薄錛岀劧鍚庡啀璋冪敤榪欎釜瀵硅薄鐨刢harValue()鏂規硶榪斿洖鍏跺搴旂殑char鏁板箋?/p>

鐏? 2008-01-10 11:38 鍙戣〃璇勮
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