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鏈変簺鏈嬪弸璇㈤棶浣跨敤 JSP Smart 涓嬭澆鏂囦歡鐨勬椂鍊欐姤閿? 杩欓噷缁欏嚭涓€涓祴璇曡繃鐨勪笉聽聽
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闇€瑕佷嬌鐢?JSP Smart 鐨?JSP 椤甸潰涓繘琛屾枃浠朵笅杞界殑浠ｇ爜(鏀?Servlet 鎴栬€吢犅?
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JavaBean 鐨勮瘽鑷繁鏀瑰惂), 鏀寔涓枃闄勪歡鍚?鍋氫簡杞唴鐮佸鐞?. 浜嬪疄涓婂彧瑕佸悜聽聽
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out 杈撳嚭瀛楄妭灏辮璁や負鏄檮浠跺唴瀹? 涓嶄竴瀹氶潪瑕佷粠鏂囦歡璇誨彇鍘熷鏁版嵁, 浠庢暟鎹犅?
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搴撲腑璇誨彇涔熷彲浠ョ殑.聽聽
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娴嬭瘯缁撴灉: Tomcat 5.0, 5.5, Resin 3.0.18 , Weblogic 8.1, 9.2 娴嬭瘯閫氳繃, 鏃犲紓甯鎬駭鐢熉犅犅?
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<% @ page contentType = " text/html; charset=GBK "聽 pageEncoding = " GBK "聽聽 %>聽聽聽
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<% @ page聽 import = " java.io.*, java.util.*, java.text.* "聽聽 %>聽聽聽
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聽聽聽聽 public聽聽 static聽聽 boolean聽 checkFor304( HttpServletRequest req,聽聽
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聽聽聽 {聽聽
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聽聽聽聽聽聽聽聽 //聽聽聽
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聽聽聽聽聽聽聽聽 //聽聽 We'll do some handling for CONDITIONAL GET (and return a 304)聽聽
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聽聽聽聽聽聽聽聽 //聽聽 If the client has set the following headers, do not try for a 304.聽聽
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聽聽聽聽聽聽聽聽 //聽聽聽
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聽聽聽聽聽聽聽聽 //聽聽聽聽 pragma: no-cache聽聽
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聽聽聽聽聽聽聽聽 //聽聽聽聽 cache-control: no-cache聽聽
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聽聽聽聽聽聽聽聽 //聽聽
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聽聽聽聽聽聽聽聽 if (聽 " no-cache " .equalsIgnoreCase(req.getHeader( " Pragma " ))聽聽
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聽聽聽聽聽聽聽 {聽聽
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聽聽聽聽聽聽聽聽聽聽聽聽 //聽 Wants specifically a fresh copy聽聽聽
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聽聽聽聽聽聽聽 }聽聽
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聽聽聽聽聽聽聽聽 else聽聽聽
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聽聽聽聽聽聽聽 {聽聽
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聽聽聽聽聽聽聽聽聽聽聽聽 //聽聽聽
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聽聽聽聽聽聽聽聽聽聽聽聽 //聽聽 HTTP 1.1 ETags go first聽聽
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聽聽聽聽聽聽聽聽聽聽聽聽 //聽聽
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聽聽聽聽聽聽聽聽聽聽聽 String thisTag聽 =聽 Long.toString(file.lastModified());聽聽
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聽聽聽聽聽聽聽聽聽聽聽 String eTag聽 =聽 req.getHeader(聽 " If-None-Match "聽 );聽聽
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聽聽聽聽聽聽聽聽聽聽聽聽 if ( eTag聽 !=聽聽 null聽 )聽聽
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聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽 if ( eTag.equals(thisTag) )聽聽
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聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽 return聽聽 true ;聽聽
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聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽 }聽聽
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聽聽聽聽聽聽聽聽聽聽聽 }聽聽
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聽聽聽聽聽聽聽聽聽聽聽聽 //聽聽聽
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聽聽聽聽聽聽聽聽聽聽聽聽 //聽聽 Next, try if-modified-since聽聽
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聽聽聽聽聽聽聽聽聽聽聽聽 //聽聽
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聽聽聽聽聽聽聽聽聽聽聽 DateFormat rfcDateFormat聽 =聽聽 new聽 SimpleDateFormat( " EEE, dd MMM yyyy HH:mm:ss z " );聽聽
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聽聽聽聽聽聽聽聽聽聽聽 Date lastModified聽 =聽聽 new聽 Date(file.lastModified());聽聽
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聽聽聽聽聽聽聽聽聽聽聽聽 try聽聽聽
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聽聽聽聽聽聽聽聽聽聽聽 {聽聽
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聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽 long聽 ifModifiedSince聽 =聽 req.getDateHeader( " If-Modified-Since " );聽聽
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聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽 // log.info("ifModifiedSince:"+ifModifiedSince);聽聽聽
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聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽 if ( ifModifiedSince聽 !=聽聽 - 1聽 )聽聽
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聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽 {聽聽
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聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽 long聽 lastModifiedTime聽 =聽 lastModified.getTime();聽聽
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聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽 // log.info("lastModifiedTime:" + lastModifiedTime);聽聽聽
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聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽 if ( lastModifiedTime聽 <=聽 ifModifiedSince )聽聽
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聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽 return聽聽 true ;聽聽
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聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽 }聽聽
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聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽 }聽聽
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聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽 else聽聽聽
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聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽 {聽聽
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聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽 try聽聽聽
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聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽 {聽聽
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聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽 String s聽 =聽 req.getHeader( " If-Modified-Since " );聽聽
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聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽 if ( s聽 !=聽聽 null聽 )聽聽
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聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽 {聽聽
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聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽 Date ifModifiedSinceDate聽 =聽 rfcDateFormat.parse(s);聽聽
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聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽 // log.info("ifModifiedSinceDate:" + ifModifiedSinceDate);聽聽聽
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聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽 if ( lastModified.before(ifModifiedSinceDate) )聽聽
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聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽 }聽聽
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聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽 }聽聽
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聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽 }聽聽
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聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽 catch聽 (ParseException e)聽聽
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聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽 {聽聽
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聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽 // log.warn(e.getLocalizedMessage(), e);聽聽聽
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聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽 }聽聽
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聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽 }聽聽
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聽聽聽聽聽聽聽聽聽聽聽 }聽聽
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聽聽聽聽聽聽聽聽聽聽聽聽 catch ( IllegalArgumentException e )聽聽
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聽聽聽聽聽聽聽聽聽聽聽 {聽聽
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聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽 //聽 Illegal date/time header format.聽聽
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聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽 //聽 We fail quietly, and return false.聽聽
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聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽 //聽 FIXME: Should really move to ETags.聽聽聽
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聽聽聽聽聽聽聽聽聽聽聽 }聽聽
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聽聽聽聽聽聽聽 }聽聽
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聽聽聽聽聽聽聽聽 return聽聽 false ;聽聽
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聽聽聽 }聽聽
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%>聽聽聽
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<%聽聽聽
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聽聽聽聽 //聽 String filePath = "c:/鏂囨。.doc";聽聽
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聽聽聽聽 //聽 濡傛灉鏄?WEB APP 涓嬬殑鐩稿璺緞鏂囦歡, 璇蜂嬌鐢ㄤ笅鍒椾唬鐮?聽聽聽
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聽聽聽 String filePath聽 =聽 application.getRealPath( " 娴嬭瘯鏂囨。.htm " );聽聽
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聽聽聽聽 boolean聽 isInline聽 =聽聽 false ; //聽 鏄惁鍏佽鐩存帴鍦ㄦ祻瑙堝櫒鍐呮墦寮€(濡傛灉娴忚鍣ㄨ兘澶熼瑙堟鏂囦歡鍐呭,聽聽
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聽聽聽聽 //聽 閭ｄ箞鏂囦歡灏嗚鎵撳紑, 鍚﹀垯浼氭彁绀轟笅杞?聽聽
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聽聽聽聽 //聽 娓呯┖缂撳啿鍖? 闃叉椤甸潰涓殑绌鴻, 绌烘牸娣誨姞鍒拌涓嬭澆鐨勬枃浠跺唴瀹逛腑鍘宦犅?
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聽聽聽聽 //聽 濡傛灉涓嶆竻绌虹殑璇濆湪璋冪敤 response.reset() 鐨勬椂鍊?Tomcat 浼氭姤閿櫬犅?
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聽聽聽聽 //聽 java.lang.IllegalStateException: getOutputStream() has already been called for聽聽
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聽聽聽聽 //聽 this response,聽聽聽
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聽聽聽 out.clear();聽聽
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聽聽聽聽 //聽 {{{ BEA Weblogic 蹇呰聽聽
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聽聽聽聽 //聽 淇 Bea Weblogic 鍑虹幇 "getOutputStream() has already been called for this response"閿欒鐨勯棶棰樎犅?
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聽聽聽聽 //聽 鍏充簬鏂囦歡涓嬭澆鏃堕噰鐢ㄦ枃浠舵祦杈撳嚭鐨勬柟寮忓鐞嗭細聽聽
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聽聽聽聽 //聽 鍔犱笂response.reset()锛屽苟涓旀墍鏈夌殑锛?gt;鍚庨潰涓嶈鎹㈣锛屽寘鎷渶鍚庝竴涓紱聽聽
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聽聽聽聽 //聽 鍥犱負Application Server鍦ㄥ鐞嗙紪璇慾sp鏃跺浜庯紖>鍜?lt;锛呬箣闂寸殑鍐呭涓€鑸槸鍘熸牱杈撳嚭锛岃€屼笖榛樿鏄疨rintWriter锛屄犅?
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聽聽聽聽 //聽 鑰屼綘鍗磋杩涜娴佽緭鍑猴細ServletOutputStream锛岃繖鏍峰仛鐩稿綋浜庤瘯鍥懼湪Servlet涓嬌鐢ㄤ袱绉嶈緭鍑烘満鍒訛紝聽聽
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聽聽聽聽 //聽 灏變細鍙戠敓锛歡etOutputStream() has already been called for this response鐨勯敊璇犅?
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聽聽聽聽 //聽 璇︾粏璇瘋銆奙ore Java Pitfill銆嬩竴涔︾殑绗簩閮ㄥ垎 Web灞侷tem 33锛氳瘯鍥懼湪Servlet涓嬌鐢ㄤ袱绉嶈緭鍑烘満鍒?270聽聽
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聽聽聽聽 //聽 鑰屼笖濡傛灉鏈夋崲琛岋紝瀵逛簬鏂囨湰鏂囦歡娌℃湁浠€涔堥棶棰橈紝浣嗘槸瀵逛簬鍏跺畠鏍煎紡锛屾瘮濡侫utoCAD銆乄ord銆丒xcel绛夋枃浠堵犅?
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聽聽聽聽 // 涓嬭澆涓嬫潵鐨勬枃浠朵腑灏變細澶氬嚭涓€浜涙崲琛岀0x0d鍜?x0a锛岃繖鏍峰彲鑳藉鑷存煇浜涙牸寮忕殑鏂囦歡鏃犳硶鎵撳紑锛屾湁浜涗篃鍙互姝ｅ父鎵撳紑銆偮犅?
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聽聽聽聽 //聽 鍚屾椂杩欑鏂瑰紡涔熻兘娓呯┖缂撳啿鍖? 闃叉椤甸潰涓殑绌鴻绛夎緭鍑哄埌涓嬭澆鍐呭閲屽幓聽聽聽
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聽聽聽 response.reset();聽聽
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聽聽聽聽 //聽 }}}聽聽聽
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聽聽聽聽 try聽 {聽聽
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聽聽聽聽聽聽聽 java.io.File f聽 =聽聽 new聽 java.io.File(filePath);聽聽
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聽聽聽聽聽聽聽聽 if聽 (f.exists()聽 &&聽 f.canRead()) {聽聽
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聽聽聽聽聽聽聽聽聽聽聽聽 //聽 鎴戜滑瑕佹鏌ュ鎴風鐨勭紦瀛樹腑鏄惁宸茬粡鏈変簡姝ゆ枃浠剁殑鏈€鏂扮増鏈? 杩欐椂鍊欏氨鍛婅瘔聽聽
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聽聽聽聽聽聽聽聽聽聽聽聽 //聽 瀹㈡埛绔棤闇€閲嶆柊涓嬭澆浜? 褰撶劧濡傛灉涓嶆兂妫€鏌ヤ篃娌℃湁鍏崇郴聽聽聽
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聽聽聽聽聽聽聽聽聽聽聽聽 if ( checkFor304( request, f ) )聽聽
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聽聽聽聽聽聽聽聽聽聽聽 {聽聽
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聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽 //聽 瀹㈡埛绔凡缁忔湁浜嗘渶鏂扮増鏈? 杩斿洖 304聽聽聽
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聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽 response.sendError( HttpServletResponse.SC_NOT_MODIFIED );聽聽
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聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽 return ;聽聽
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聽聽聽聽聽聽聽聽聽聽聽 }聽聽
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聽聽聽聽聽聽聽聽聽聽聽聽 //聽 浠庢湇鍔″櫒鐨勯厤缃潵璇誨彇鏂囦歡鐨?contentType 骞惰缃contentType, 涓嶆帹鑽愯缃負聽聽
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聽聽聽聽聽聽聽聽聽聽聽聽 //聽 application/x-download, 鍥犱負鏈夋椂鍊欐垜浠殑瀹㈡埛鍙兘浼氬笇鏈涘湪娴忚鍣ㄩ噷鐩存帴鎵撳紑,聽聽
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聽聽聽聽聽聽聽聽聽聽聽聽 //聽 濡?Excel 鎶ヨ〃, 鑰屼笖 application/x-download 涔熶笉鏄竴涓爣鍑嗙殑 mime type,聽聽
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聽聽聽聽聽聽聽聽聽聽聽聽 //聽 浼間箮 FireFox 灏變笉璁よ瘑杩欑鏍煎紡鐨?mime type聽聽聽
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聽聽聽聽聽聽聽聽聽聽聽 String mimetype聽 =聽聽 null ;聽聽
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聽聽聽聽聽聽聽聽聽聽聽 mimetype聽 =聽 application.getMimeType( filePath );聽聽
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聽聽聽聽聽聽聽聽聽聽聽聽 if ( mimetype聽 ==聽聽 null聽 )聽聽
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聽聽聽聽聽聽聽聽聽聽聽 {聽聽
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聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽 mimetype聽 =聽聽 " application/octet-stream;charset=ISO8859-1 " ;聽聽
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聽聽聽聽聽聽聽聽聽聽聽 }聽聽
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聽聽聽聽聽聽聽聽聽聽聽 response.setContentType( mimetype );聽聽
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聽聽聽聽聽聽聽聽聽聽聽聽 //聽 IE 鐨勮瘽灏卞彧鑳界敤 IE 鎵嶈璇嗙殑澶存墠鑳戒笅杞?HTML 鏂囦歡, 鍚﹀垯 IE 蹇呭畾瑕佹墦寮€姝ゆ枃浠?聽聽聽
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聽聽聽聽聽聽聽聽聽聽聽 String ua聽 =聽 request.getHeader( " User-Agent " ); //聽 鑾峰彇缁堢绫誨瀷聽聽聽
聽
聽聽聽聽聽聽聽聽聽聽聽聽 if (ua聽 ==聽聽 null ) ua聽 =聽聽 " User-Agent: Mozilla/4.0 (compatible; MSIE 6.0;) " ;聽聽
聽
聽聽聽聽聽聽聽聽聽聽聽聽 boolean聽 isIE聽 =聽 ua.toLowerCase().indexOf( " msie " )聽 !=聽聽 - 1 ; //聽 鏄惁涓?IE聽聽聽
聽
聽
聽
聽聽聽聽聽聽聽聽聽聽聽聽 if (isIE聽 &&聽聽 ! isInline) {聽聽
聽
聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽 mimetype聽 =聽聽 " application/x-msdownload " ;聽聽
聽
聽聽聽聽聽聽聽聽聽聽聽 }聽聽
聽
聽
聽
聽
聽
聽聽聽聽聽聽聽聽聽聽聽聽 //聽 涓嬮潰鎴戜滑灏嗚娉曡瀹㈡埛绔繚瀛樻枃浠剁殑鏃跺€欐樉绀烘纭殑鏂囦歡鍚? 鍏蜂綋灏辨槸灏嗘枃浠跺悕聽聽
聽
聽聽聽聽聽聽聽聽聽聽聽聽 //聽 杞崲涓?ISO8859-1 缂栫爜聽聽聽
聽
聽聽聽聽聽聽聽聽聽聽聽 String downFileName聽 =聽聽 new聽 String(f.getName().getBytes(),聽 " ISO8859-1 " );聽聽
聽
聽
聽
聽聽聽聽聽聽聽聽聽聽聽 String inlineType聽 =聽 isInline聽 ?聽聽 " inline "聽 :聽 " attachment " ; //聽 鏄惁鍐呰仈闄勪歡聽聽
聽
聽
聽
聽聽聽聽聽聽聽聽聽聽聽聽 //聽 or using this, but this header might not supported by FireFox聽聽
聽
聽聽聽聽聽聽聽聽聽聽聽聽 // response.setContentType("application/x-download");聽聽聽
聽
聽聽聽聽聽聽聽聽聽聽聽 response.setHeader ( " Content-Disposition " , inlineType聽 +聽聽 " ;filename=/ ""聽聽
聽
聽聽聽聽聽聽聽聽聽聽聽聽 +聽 downFileName聽 +聽聽 " / "" );聽聽聽
聽
聽
聽
聽聽聽聽聽聽聽聽聽聽聽 response.setContentLength(( int ) f.length()); //聽 璁劇疆涓嬭澆鍐呭澶у皬聽聽聽
聽
聽
聽
聽聽聽聽聽聽聽聽聽聽聽聽 byte [] buffer聽 =聽聽 new聽聽 byte [ 4096 ]; //聽 缂撳啿鍖郝犅犅?
聽
聽聽聽聽聽聽聽聽聽聽聽 BufferedOutputStream output聽 =聽聽 null ;聽聽
聽
聽聽聽聽聽聽聽聽聽聽聽 BufferedInputStream input聽 =聽聽 null ;聽聽
聽
聽
聽
聽聽聽聽聽聽聽聽聽聽聽聽 //聽聽
聽
聽聽聽聽聽聽聽聽聽聽聽聽 try聽 {聽聽
聽
聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽 output聽 =聽聽 new聽 BufferedOutputStream(response.getOutputStream());聽聽
聽
聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽 input聽 =聽聽 new聽 BufferedInputStream( new聽 FileInputStream(f));聽聽
聽
聽
聽
聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽 int聽 n聽 =聽 ( - 1 );聽聽
聽
聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽 while聽 ((n聽 =聽 input.read(buffer,聽 0 ,聽 4096 ))聽 >聽聽 - 1 ) {聽聽
聽
聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽 output.write(buffer,聽 0 , n);聽聽
聽
聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽 }聽聽
聽
聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽 response.flushBuffer();聽聽
聽
聽聽聽聽聽聽聽聽聽聽聽 }聽聽
聽
聽聽聽聽聽聽聽聽聽聽聽聽 catch聽 (Exception e) {聽聽
聽
聽聽聽聽聽聽聽聽聽聽聽 }聽 //聽 鐢ㄦ埛鍙兘鍙栨秷浜嗕笅杞鉸犅犅?
聽
聽聽聽聽聽聽聽聽聽聽聽聽 finally聽 {聽聽
聽
聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽 if聽 (input聽 !=聽聽 null ) input.close();聽聽
聽
聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽 if聽 (output聽 !=聽聽 null ) output.close();聽聽
聽
聽聽聽聽聽聽聽聽聽聽聽 }聽聽
聽
聽
聽
聽聽聽聽聽聽聽 }聽聽
聽
聽聽聽聽聽聽聽聽 return ;聽聽
聽
聽聽聽 }聽 catch聽 (Exception ex) {聽聽
聽
聽聽聽聽聽聽 // ex.printStackTrace();聽聽聽
聽
聽聽聽 }聽聽
聽
聽聽聽聽 //聽 濡傛灉涓嬭澆澶辮觸浜嗗氨鍛婅瘔鐢ㄦ埛姝ゆ枃浠朵笉瀛樺湪聽聽聽
聽
聽聽聽 response.sendError( 404 );聽聽
聽
%>聽聽
<%--
鏈変簺鏈嬪弸璇㈤棶浣跨敤 JSP Smart 涓嬭澆鏂囦歡鐨勬椂鍊欐姤閿? 杩欓噷缁欏嚭涓€涓祴璇曡繃鐨勪笉
闇€瑕佷嬌鐢?JSP Smart 鐨?JSP 椤甸潰涓繘琛屾枃浠朵笅杞界殑浠ｇ爜(鏀?Servlet 鎴栬€?
JavaBean 鐨勮瘽鑷繁鏀瑰惂), 鏀寔涓枃闄勪歡鍚?鍋氫簡杞唴鐮佸鐞?. 浜嬪疄涓婂彧瑕佸悜
out 杈撳嚭瀛楄妭灏辮璁や負鏄檮浠跺唴瀹? 涓嶄竴瀹氶潪瑕佷粠鏂囦歡璇誨彇鍘熷鏁版嵁, 浠庢暟鎹?
搴撲腑璇誨彇涔熷彲浠ョ殑.
娴嬭瘯缁撴灉: Tomcat 5.0, 5.5, Resin 3.0.18 , Weblogic 8.1, 9.2 娴嬭瘯閫氳繃, 鏃犲紓甯鎬駭鐢?
--%>
<% @ page contentType = " text/html; charset=GBK "聽 pageEncoding = " GBK "聽聽 %>
<% @ page聽 import = " java.io.*, java.util.*, java.text.* "聽聽 %>
聽
<%!
聽聽聽聽
聽聽聽聽 public聽聽 static聽聽 boolean聽 checkFor304( HttpServletRequest req,
聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽 File file )
聽聽聽 {
聽聽聽聽聽聽聽聽 //
聽聽聽聽聽聽聽聽 //聽聽 We'll do some handling for CONDITIONAL GET (and return a 304)
聽聽聽聽聽聽聽聽 //聽聽 If the client has set the following headers, do not try for a 304.
聽聽聽聽聽聽聽聽 //
聽聽聽聽聽聽聽聽 //聽聽聽聽 pragma: no-cache
聽聽聽聽聽聽聽聽 //聽聽聽聽 cache-control: no-cache
聽聽聽聽聽聽聽聽 //
聽
聽聽聽聽聽聽聽聽 if (聽 " no-cache " .equalsIgnoreCase(req.getHeader( " Pragma " ))
聽聽聽聽聽聽聽聽聽聽聽聽 ||聽聽 " no-cache " .equalsIgnoreCase(req.getHeader( " cache-control " )))
聽聽聽聽聽聽聽 {
聽聽聽聽聽聽聽聽聽聽聽聽 //聽 Wants specifically a fresh copy
聽聽聽聽聽聽聽 }
聽聽聽聽聽聽聽聽 else
聽聽聽聽聽聽聽 {
聽聽聽聽聽聽聽聽聽聽聽聽 //
聽聽聽聽聽聽聽聽聽聽聽聽 //聽聽 HTTP 1.1 ETags go first
聽聽聽聽聽聽聽聽聽聽聽聽 //
聽聽聽聽聽聽聽聽聽聽聽 String thisTag聽 =聽 Long.toString(file.lastModified());
聽
聽聽聽聽聽聽聽聽聽聽聽 String eTag聽 =聽 req.getHeader(聽 " If-None-Match "聽 );
聽
聽聽聽聽聽聽聽聽聽聽聽聽 if ( eTag聽 !=聽聽 null聽 )
聽聽聽聽聽聽聽聽聽聽聽 {
聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽 if ( eTag.equals(thisTag) )
聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽 {
聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽 return聽聽 true ;
聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽 }
聽聽聽聽聽聽聽聽聽聽聽 }
聽
聽聽聽聽聽聽聽聽聽聽聽聽 //
聽聽聽聽聽聽聽聽聽聽聽聽 //聽聽 Next, try if-modified-since
聽聽聽聽聽聽聽聽聽聽聽聽 //
聽聽聽聽聽聽聽聽聽聽聽 DateFormat rfcDateFormat聽 =聽聽 new聽 SimpleDateFormat( " EEE, dd MMM yyyy HH:mm:ss z " );
聽聽聽聽聽聽聽聽聽聽聽 Date lastModified聽 =聽聽 new聽 Date(file.lastModified());
聽
聽聽聽聽聽聽聽聽聽聽聽聽 try
聽聽聽聽聽聽聽聽聽聽聽 {
聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽 long聽 ifModifiedSince聽 =聽 req.getDateHeader( " If-Modified-Since " );
聽
聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽 // log.info("ifModifiedSince:"+ifModifiedSince);
聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽 if ( ifModifiedSince聽 !=聽聽 - 1聽 )
聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽 {
聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽 long聽 lastModifiedTime聽 =聽 lastModified.getTime();
聽
聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽 // log.info("lastModifiedTime:" + lastModifiedTime);
聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽 if ( lastModifiedTime聽 <=聽 ifModifiedSince )
聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽 {
聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽 return聽聽 true ;
聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽 }
聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽 }
聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽 else
聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽 {
聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽 try
聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽 {
聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽 String s聽 =聽 req.getHeader( " If-Modified-Since " );
聽
聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽 if ( s聽 !=聽聽 null聽 )
聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽 {
聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽 Date ifModifiedSinceDate聽 =聽 rfcDateFormat.parse(s);
聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽 // log.info("ifModifiedSinceDate:" + ifModifiedSinceDate);
聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽 if ( lastModified.before(ifModifiedSinceDate) )
聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽 {
聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽 return聽聽 true ;
聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽 }
聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽 }
聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽 }
聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽 catch聽 (ParseException e)
聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽 {
聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽 // log.warn(e.getLocalizedMessage(), e);
聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽 }
聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽 }
聽聽聽聽聽聽聽聽聽聽聽 }
聽聽聽聽聽聽聽聽聽聽聽聽 catch ( IllegalArgumentException e )
聽聽聽聽聽聽聽聽聽聽聽 {
聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽 //聽 Illegal date/time header format.
聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽 //聽 We fail quietly, and return false.
聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽 //聽 FIXME: Should really move to ETags.
聽聽聽聽聽聽聽聽聽聽聽 }
聽聽聽聽聽聽聽 }
聽
聽聽聽聽聽聽聽聽 return聽聽 false ;
聽聽聽 }
%>
聽
<%
聽聽聽聽 //聽 String filePath = "c:/鏂囨。.doc";
聽聽聽聽 //聽 濡傛灉鏄?WEB APP 涓嬬殑鐩稿璺緞鏂囦歡, 璇蜂嬌鐢ㄤ笅鍒椾唬鐮?
聽聽聽 String filePath聽 =聽 application.getRealPath( " 娴嬭瘯鏂囨。.htm " );
聽聽聽聽 boolean聽 isInline聽 =聽聽 false ; //聽 鏄惁鍏佽鐩存帴鍦ㄦ祻瑙堝櫒鍐呮墦寮€(濡傛灉娴忚鍣ㄨ兘澶熼瑙堟鏂囦歡鍐呭,
聽聽聽聽 //聽 閭ｄ箞鏂囦歡灏嗚鎵撳紑, 鍚﹀垯浼氭彁绀轟笅杞?
聽
聽聽聽聽 //聽 娓呯┖缂撳啿鍖? 闃叉椤甸潰涓殑绌鴻, 绌烘牸娣誨姞鍒拌涓嬭澆鐨勬枃浠跺唴瀹逛腑鍘?
聽聽聽聽 //聽 濡傛灉涓嶆竻绌虹殑璇濆湪璋冪敤 response.reset() 鐨勬椂鍊?Tomcat 浼氭姤閿?
聽聽聽聽 //聽 java.lang.IllegalStateException: getOutputStream() has already been called for
聽聽聽聽 //聽 this response,
聽聽聽 out.clear();
聽
聽聽聽聽 //聽 {{{ BEA Weblogic 蹇呰
聽聽聽聽 //聽 淇 Bea Weblogic 鍑虹幇 "getOutputStream() has already been called for this response"閿欒鐨勯棶棰?
聽聽聽聽 //聽 鍏充簬鏂囦歡涓嬭澆鏃堕噰鐢ㄦ枃浠舵祦杈撳嚭鐨勬柟寮忓鐞嗭細
聽聽聽聽 //聽 鍔犱笂response.reset()锛屽苟涓旀墍鏈夌殑锛?gt;鍚庨潰涓嶈鎹㈣锛屽寘鎷渶鍚庝竴涓紱
聽聽聽聽 //聽 鍥犱負Application Server鍦ㄥ鐞嗙紪璇慾sp鏃跺浜庯紖>鍜?lt;锛呬箣闂寸殑鍐呭涓€鑸槸鍘熸牱杈撳嚭锛岃€屼笖榛樿鏄疨rintWriter锛?
聽聽聽聽 //聽 鑰屼綘鍗磋杩涜娴佽緭鍑猴細ServletOutputStream锛岃繖鏍峰仛鐩稿綋浜庤瘯鍥懼湪Servlet涓嬌鐢ㄤ袱绉嶈緭鍑烘満鍒訛紝
聽聽聽聽 //聽 灏變細鍙戠敓锛歡etOutputStream() has already been called for this response鐨勯敊璇?
聽聽聽聽 //聽 璇︾粏璇瘋銆奙ore Java Pitfill銆嬩竴涔︾殑绗簩閮ㄥ垎 Web灞侷tem 33锛氳瘯鍥懼湪Servlet涓嬌鐢ㄤ袱绉嶈緭鍑烘満鍒?270
聽聽聽聽 //聽 鑰屼笖濡傛灉鏈夋崲琛岋紝瀵逛簬鏂囨湰鏂囦歡娌℃湁浠€涔堥棶棰橈紝浣嗘槸瀵逛簬鍏跺畠鏍煎紡锛屾瘮濡侫utoCAD銆乄ord銆丒xcel绛夋枃浠?
聽聽聽聽 // 涓嬭澆涓嬫潵鐨勬枃浠朵腑灏變細澶氬嚭涓€浜涙崲琛岀0x0d鍜?x0a锛岃繖鏍峰彲鑳藉鑷存煇浜涙牸寮忕殑鏂囦歡鏃犳硶鎵撳紑锛屾湁浜涗篃鍙互姝ｅ父鎵撳紑銆?
聽聽聽聽 //聽 鍚屾椂杩欑鏂瑰紡涔熻兘娓呯┖缂撳啿鍖? 闃叉椤甸潰涓殑绌鴻绛夎緭鍑哄埌涓嬭澆鍐呭閲屽幓
聽聽聽 response.reset();
聽聽聽聽 //聽 }}}
聽
聽聽聽聽 try聽 {
聽聽聽聽聽聽聽 java.io.File f聽 =聽聽 new聽 java.io.File(filePath);
聽聽聽聽聽聽聽聽 if聽 (f.exists()聽 &&聽 f.canRead()) {
聽聽聽聽聽聽聽聽聽聽聽聽 //聽 鎴戜滑瑕佹鏌ュ鎴風鐨勭紦瀛樹腑鏄惁宸茬粡鏈変簡姝ゆ枃浠剁殑鏈€鏂扮増鏈? 杩欐椂鍊欏氨鍛婅瘔
聽聽聽聽聽聽聽聽聽聽聽聽 //聽 瀹㈡埛绔棤闇€閲嶆柊涓嬭澆浜? 褰撶劧濡傛灉涓嶆兂妫€鏌ヤ篃娌℃湁鍏崇郴
聽聽聽聽聽聽聽聽聽聽聽聽 if ( checkFor304( request, f ) )
聽聽聽聽聽聽聽聽聽聽聽 {
聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽 //聽 瀹㈡埛绔凡缁忔湁浜嗘渶鏂扮増鏈? 杩斿洖 304
聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽 response.sendError( HttpServletResponse.SC_NOT_MODIFIED );
聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽 return ;
聽聽聽聽聽聽聽聽聽聽聽 }
聽
聽聽聽聽聽聽聽聽聽聽聽聽 //聽 浠庢湇鍔″櫒鐨勯厤缃潵璇誨彇鏂囦歡鐨?contentType 骞惰缃contentType, 涓嶆帹鑽愯缃負
聽聽聽聽聽聽聽聽聽聽聽聽 //聽 application/x-download, 鍥犱負鏈夋椂鍊欐垜浠殑瀹㈡埛鍙兘浼氬笇鏈涘湪娴忚鍣ㄩ噷鐩存帴鎵撳紑,
聽聽聽聽聽聽聽聽聽聽聽聽 //聽 濡?Excel 鎶ヨ〃, 鑰屼笖 application/x-download 涔熶笉鏄竴涓爣鍑嗙殑 mime type,
聽聽聽聽聽聽聽聽聽聽聽聽 //聽 浼間箮 FireFox 灏變笉璁よ瘑杩欑鏍煎紡鐨?mime type
聽聽聽聽聽聽聽聽聽聽聽 String mimetype聽 =聽聽 null ;
聽聽聽聽聽聽聽聽聽聽聽 mimetype聽 =聽 application.getMimeType( filePath );
聽聽聽聽聽聽聽聽聽聽聽聽 if ( mimetype聽 ==聽聽 null聽 )
聽聽聽聽聽聽聽聽聽聽聽 {
聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽 mimetype聽 =聽聽 " application/octet-stream;charset=ISO8859-1 " ;
聽聽聽聽聽聽聽聽聽聽聽 }
聽
聽聽聽聽聽聽聽聽聽聽聽 response.setContentType( mimetype );
聽
聽聽聽聽聽聽聽聽聽聽聽聽 //聽 IE 鐨勮瘽灏卞彧鑳界敤 IE 鎵嶈璇嗙殑澶存墠鑳戒笅杞?HTML 鏂囦歡, 鍚﹀垯 IE 蹇呭畾瑕佹墦寮€姝ゆ枃浠?
聽聽聽聽聽聽聽聽聽聽聽 String ua聽 =聽 request.getHeader( " User-Agent " ); //聽 鑾峰彇缁堢绫誨瀷
聽聽聽聽聽聽聽聽聽聽聽聽 if (ua聽 ==聽聽 null ) ua聽 =聽聽 " User-Agent: Mozilla/4.0 (compatible; MSIE 6.0;) " ;
聽聽聽聽聽聽聽聽聽聽聽聽 boolean聽 isIE聽 =聽 ua.toLowerCase().indexOf( " msie " )聽 !=聽聽 - 1 ; //聽 鏄惁涓?IE
聽
聽聽聽聽聽聽聽聽聽聽聽聽 if (isIE聽 &&聽聽 ! isInline) {
聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽 mimetype聽 =聽聽 " application/x-msdownload " ;
聽聽聽聽聽聽聽聽聽聽聽 }
聽
聽
聽聽聽聽聽聽聽聽聽聽聽聽 //聽 涓嬮潰鎴戜滑灏嗚娉曡瀹㈡埛绔繚瀛樻枃浠剁殑鏃跺€欐樉绀烘纭殑鏂囦歡鍚? 鍏蜂綋灏辨槸灏嗘枃浠跺悕
聽聽聽聽聽聽聽聽聽聽聽聽 //聽 杞崲涓?ISO8859-1 缂栫爜
聽聽聽聽聽聽聽聽聽聽聽 String downFileName聽 =聽聽 new聽 String(f.getName().getBytes(),聽 " ISO8859-1 " );
聽
聽聽聽聽聽聽聽聽聽聽聽 String inlineType聽 =聽 isInline聽 ?聽聽 " inline "聽 :聽 " attachment " ; //聽 鏄惁鍐呰仈闄勪歡
聽
聽聽聽聽聽聽聽聽聽聽聽聽 //聽 or using this, but this header might not supported by FireFox
聽聽聽聽聽聽聽聽聽聽聽聽 // response.setContentType("application/x-download");
聽聽聽聽聽聽聽聽聽聽聽 response.setHeader ( " Content-Disposition " , inlineType聽 +聽聽 " ;filename=/ ""
聽聽聽聽聽聽聽聽聽聽聽聽 +聽 downFileName聽 +聽聽 " / "" );
聽
聽聽聽聽聽聽聽聽聽聽聽 response.setContentLength(( int ) f.length()); //聽 璁劇疆涓嬭澆鍐呭澶у皬
聽
聽聽聽聽聽聽聽聽聽聽聽聽 byte [] buffer聽 =聽聽 new聽聽 byte [ 4096 ]; //聽 缂撳啿鍖?
聽聽聽聽聽聽聽聽聽聽聽 BufferedOutputStream output聽 =聽聽 null ;
聽聽聽聽聽聽聽聽聽聽聽 BufferedInputStream input聽 =聽聽 null ;
聽
聽聽聽聽聽聽聽聽聽聽聽聽 //
聽聽聽聽聽聽聽聽聽聽聽聽 try聽 {
聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽 output聽 =聽聽 new聽 BufferedOutputStream(response.getOutputStream());
聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽 input聽 =聽聽 new聽 BufferedInputStream( new聽 FileInputStream(f));
聽
聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽 int聽 n聽 =聽 ( - 1 );
聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽 while聽 ((n聽 =聽 input.read(buffer,聽 0 ,聽 4096 ))聽 >聽聽 - 1 ) {
聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽 output.write(buffer,聽 0 , n);
聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽 }
聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽 response.flushBuffer();
聽聽聽聽聽聽聽聽聽聽聽 }
聽聽聽聽聽聽聽聽聽聽聽聽 catch聽 (Exception e) {
聽聽聽聽聽聽聽聽聽聽聽 }聽 //聽 鐢ㄦ埛鍙兘鍙栨秷浜嗕笅杞?
聽聽聽聽聽聽聽聽聽聽聽聽 finally聽 {
聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽 if聽 (input聽 !=聽聽 null ) input.close();
聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽 if聽 (output聽 !=聽聽 null ) output.close();
聽聽聽聽聽聽聽聽聽聽聽 }
聽
聽聽聽聽聽聽聽 }
聽聽聽聽聽聽聽聽 return ;
聽聽聽 }聽 catch聽 (Exception ex) {
聽聽聽聽聽聽 // ex.printStackTrace();
聽聽聽 }
聽聽聽聽 //聽 濡傛灉涓嬭澆澶辮觸浜嗗氨鍛婅瘔鐢ㄦ埛姝ゆ枃浠朵笉瀛樺湪
聽聽聽 response.sendError( 404 );
%> 鍙戣〃浜?@ 2008骞?6鏈?6鏃ャ€€11:31:00 | 璇勮( 2 ) | 缂栬緫| 涓炬姤| 鏀惰棌
鏃т竴绡?JSP涓殑涓枃瀛楃澶勭悊(杞創) | 鏂頒竴绡?java缁忓吀棰樼洰---1(杞創) fulianglove 鍙戣〃浜?008骞?鏈?6鏃?12:40:50聽 IP:涓炬姤
绠€鍗曠偣鐨勶細
<%
response.setContentType(fileminitype);
response.setHeader("Location",filename);
response.setHeader("Cache-Control", "max-age=" + cacheTime);
response.setHeader("Content-Disposition", "attachment; filename=" + filename); //filename搴旇鏄紪鐮佸悗鐨?utf-8)
response.setContentLength(filelength);
OutputStream outputStream = response.getOutputStream();
InputStream inputStream = new FileInputStream(filepath);
byte[] buffer = new byte[1024];
int i = -1;
while ((i = inputStream.read(buffer)) != -1) {
outputStream.write(buffer, 0, i);
}
outputStream.flush();
outputStream.close();
inputStream.close();
outputStream = null;
%>
鏈枃鏉ヨ嚜CSDN鍗氬锛岃漿杞借鏍囨槑鍑哄锛歨ttp://blog.csdn.net/fulianglove/archive/2008/06/26/2588085.aspx
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