-
UID:2537
-
- 注册时间2006-05-09
- 最后登录2020-05-29
- 在线时间3小时
-
- 发帖8
- 搜Ta的帖子
- 精华
0
- 铜板1641
- 人品值95
- 贡献值0
- 交易币0
- 好评度8
- 信誉值0
- 金币0
-
访问TA的空间加好友用道具
- 发帖
- 8
- 铜板
- 1641
- 人品值
- 95
- 贡献值
- 0
- 交易币
- 0
- 好评度
- 8
- 信誉值
- 0
- 金币
- 0
- 所在楼道
|
/* !5j3gr~ **SiteFileFetch.java `tG_O */ s8[9YfuW package NetFox; 4C%>/*%8> import java.io.*; ^-u HdafP import java.net.*; w<Cmzkf rcx;3Vne S I7B6c public class SiteFileFetch extends Thread { P|4E1O ]$*{< 1H=wl=K SiteInfoBean siteInfoBean = null; //文件信息Bean e@=[+iJc long[] nStartPos; //开始位置 7omGg~!k( long[] nEndPos; //结束位置 i4n
b# FileSplitterFetch[] fileSplitterFetch; //子线程对象 Oq,.Kz long nFileLength; //文件长度 ]7kGHIJ| boolean bFirst = true; //是否第一次取文件 s ;s-6%p boolean bStop = false; //停止标志
|WU`p File tmpFile; //文件下载的临时信息 nnL$m_K~ DataOutputStream output; //输出到文件的输出流 tR*W-% _]UDmn[C //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) 9*;isMkq< public SiteFileFetch(SiteInfoBean bean) throws IOException O'-Zn]@.] { m5w9l"U]H siteInfoBean = bean; 9K46>_TyH //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); Czr4
-#2 tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); MLBg_< if(tmpFile.exists ()) kA%OF*%|6 { x7Rq|NQ bFirst = false; t;dQ~e20 read_nPos(); s}#[*WOc } IS2Ij else s~Wu0%])Q { ; axaZV nStartPos = new long[bean.getNSplitter()]; K#UA M. nEndPos = new long[bean.getNSplitter()]; -`dxx)x } u rXb!e{l fslk7RlSKg NzAtdcwR mK40 f } ^la i!uZVa LnTe_Q7_ 90iW-"l+[ public void run() l ~4e2xoT { /;nO<X:XV //获得文件长度 {0vbC/?] //分割文件 EO/cW<uV' //实例FileSplitterFetch RO$@>vL //启动FileSplitterFetch线程 (
ssH=a //等待子线程返回 y'!p>/%v try{ <]Pix) if(bFirst) ?PE1aB+{: { IEoR7: nFileLength = getFileSize(); ;}eEG{`Y if(nFileLength == -1) >\7RIy3 { &lh_-@Xz System.err.println("File Length is not known!"); |:=b9kv } 2x`xyR_Q.R else if(nFileLength == -2) -{8Q= N { pmW6~%}* System.err.println("File is not access!"); _X%6 +0M
} H"FflmUO else I"cQ5gF?A { x-V' 0-#U> for(int i=0;i<nStartPos.length;i++) /ik)4]> { jO&f*rxN nStartPos = (long)(i*(nFileLength/nStartPos.length)); E8iadf49 } Gp ^ owr for(int i=0;i<nEndPos.length-1;i++) ;h-G3>Il { DtF![0w/ nEndPos = nStartPos[i+1]; =o{: -EKQF } 0(9I\j5`TT nEndPos[nEndPos.length-1] = nFileLength; e(n2+S#N } RM^?&PM85 } or!D ZU|V+yT >OKS/(I0 //启动子线程 `!,\kc1 fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; BBU84s[ for(int i=0;i<nStartPos.length;i++) R5NRCI { 7<R6T9g fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), C*{15!d:G siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), ##`;Eh0a nStartPos,nEndPos,i); U/3e,`c Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); nF. ;LM fileSplitterFetch.start(); yo?g"vbE } &Qtp"#{ // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), f=_Bx2ub siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); UYcyk
$da // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", dWW-tHv# nEndPos = " + nFileLength); PK-}Ldj
// fileSplitterFetch[nPos.length-1].start(); )-Mn"1ia do=x9k@Q UPVO~hB; //等待子线程结束 'TK$ndy;7} //int count = 0; KM_)7?` //是否结束while循环 []=FZ`4 boolean breakWhile = false; C NzSBm cy& (}*\ { while(!bStop) F;?TR[4!k { AF*ni~ write_nPos(); Lt;.Nw Utility.sleep(500); ~4=]%XYz breakWhile = true; ,<;l"v( K4?t' dd] JO&;bT< for(int i=0;i<nStartPos.length;i++) aR="5{en{: { uGP[l`f|FQ if(!fileSplitterFetch.bDownOver) 9LqMQv"xW { Ypn%[sSOp breakWhile = false; >tmnj/=& break; S<y>Y } F;d%@E_Bc } .`p<hA)%[C if(breakWhile) CzzUi]*Ac{ break; w|
-0@ lnS\5J R<y Nv //count++; ,`%k'ecN //if(count>4) q19k<BqR // siteStop(); `r~`N`o5A } 8`AcS|k 9&[)(On74 fR]p+\#8u* System.err.println("文件下载结束!"); E,*JPK-A x } mc0sdb,c$ catch(Exception e){e.printStackTrace ();} 3ZW/$KP/ } nJldz; [0% yJH NSMjr_ //获得文件长度 @b::6n/u public long getFileSize() OQytgXED { |aI|yq) int nFileLength = -1; IL+#ynC try{ 4DQ07w URL url = new URL(siteInfoBean.getSSiteURL()); bK_0NrXP HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); 9D{u,Q V httpConnection.setRequestProperty("User-Agent","NetFox"); KA|&Q<<{@
g( ]b\rj
nR,Qm=; int responseCode=httpConnection.getResponseCode(); u|_LR5S!j if(responseCode>=400) kz7vbY { 2cs?("8e% processErrorCode(responseCode); dJdD"xj return -2; //-2 represent access is error ys&"r":I } g^s+C Z wq:b j=j '|YtNhWZ? String sHeader; K:>NGGY8r L<f-Ed9| tl{]gz for(int i=1;;i++) ')AByD}Hi] { _%A/ ) //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); '\ph`Run //Utility.log(in.readLine()); -vv
sHeader=httpConnection.getHeaderFieldKey(i); $:%*gY4~76 if(sHeader!=null) iN:G/ss4O { T!m42EvIvE if(sHeader.equals("Content-Length")) $\0cJCQ3 { -{yDk$" nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); DHh+%|e break; SBCL1aM } v?Z'[l } i>ESEmb- else k9*J*7l-m break; ax-=n ( } ^;V}l?J_s } QE7+rBa catch(IOException e){e.printStackTrace ();} 0=N4O!X9 catch(Exception e){e.printStackTrace ();} vbr~<JT= 'P@=/ ucQezmie Utility.log(nFileLength); G*)s%2c>h zrLhQ3V#> YYTO,4 return nFileLength; &GXtdO>;Zv } pj!k|F9 W@:^aH ]h #WkcXQ //保存下载信息(文件指针位置) GIl:3iB49 private void write_nPos() |RHO+J { H/cs_i try{ EsT0"{ output = new DataOutputStream(new FileOutputStream(tmpFile)); ggrI>vaw output.writeInt(nStartPos.length); j G+T. for(int i=0;i<nStartPos.length;i++) R19'|TJ { qJ\X~5{ // output.writeLong(nPos); Z7`5x output.writeLong(fileSplitterFetch.nStartPos); B*9 output.writeLong(fileSplitterFetch.nEndPos); fswZM\@ } Eem 2qKj output.close(); Ix( 6 } i
FC"!23f catch(IOException e){e.printStackTrace ();} =^BqWC2~ catch(Exception e){e.printStackTrace ();} o8w-$
Qb } Nawp t% $@_YdZ! l0gH(28K //读取保存的下载信息(文件指针位置) 6tOP}X private void read_nPos() "AT&!t[J {
bZxv/\ try{ o:Ln._bj DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); 4qqF v?O[r int nCount = input.readInt(); a^@+%?X nStartPos = new long[nCount]; y' 2<qj nEndPos = new long[nCount]; I|$'Q$m~ for(int i=0;i<nStartPos.length;i++)
=Ov9Kf { \V._Z>] nStartPos = input.readLong(); 9 1BY]N nEndPos = input.readLong(); BfX%|CWh } 0Wa#lkn$I input.close(); g;$E1U=R-E } HkW/G[7x& catch(IOException e){e.printStackTrace ();} lTn;3' catch(Exception e){e.printStackTrace ();} 5fU!'ajaN7 } )URwIe{ g+:$X- r #N; $ private void processErrorCode(int nErrorCode) cB{%u
' { %rFP#L System.err.println("Error Code : " + nErrorCode); .8-PB*vb } )8:n}w <inl{CX/ %wOOzp` //停止文件下载 k"t>He public void siteStop() C,[L/! { P~&O4['< bStop = true; TLy;4R2Nn for(int i=0;i<nStartPos.length;i++) &q.)2o#Q. fileSplitterFetch.splitterStop(); O ,l\e3; &u&2D$K,tp
}K?F7cD } )sqaR^ } 8^i[j\Y;6 //负责部分文件的抓取 5@K\c6 **FileSplitterFetch.java bC6X?m= */ c qv.dC package NetFox; L%f-L.9`u ,KT<4 6tX.(/+L import java.io.*; QI.t&sCh5 import java.net.*; I`lDWL [S%J*sz~ HP#ki !' public class FileSplitterFetch extends Thread { 9 _eS`,' `Rrr>vj 0"hiCGm' String sURL; //File URL Ec+22X long nStartPos; //File Snippet Start Position ?.8<- long nEndPos; //File Snippet End Position DQcWq'yY^ int nThreadID; //Thread's ID 0(\p<qq boolean bDownOver = false; //Downing is over .hxin[Y boolean bStop = false; //Stop identical q{/*n]K FileAccessI fileAccessI = null; //File Access interface X+@s] =<Hy"4+?. ZHz^S)o\[s public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException B.El a { FZeP<Ban this.sURL = sURL; U8E0~[y' this.nStartPos = nStart; *jGPGnSo this.nEndPos = nEnd; (yfXMp,x nThreadID = id; ]XY0c6
< fileAccessI = new FileAccessI(sName,nStartPos);//定位 4AJ9`1d4 } P>|Ef~j v< Ty|(gd K@HLIuz4t public void run() W.IH#`-9E { cFw3Iw"JJ while(nStartPos < nEndPos && !bStop) B+|IZoR { 2f `&WUe -W9gH 9g96 d- try{ $-Cy URL url = new URL(sURL); #o~[1K+Yq HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); YjX*)Q_sl? httpConnection.setRequestProperty("User-Agent","NetFox"); *g*VCO String sProperty = "bytes="+nStartPos+"-"; FbmsN)mv!% httpConnection.setRequestProperty("RANGE",sProperty); u9BjgK(M Utility.log(sProperty); f0OgK<.>T s~=g*99H KLW&bJ$|j InputStream input = httpConnection.getInputStream(); S3QaYq"v //logResponseHead(httpConnection); 1}`2\3, rJX\6{V!_ !F-sA: xq byte[] b = new byte[1024]; _;#9!"& int nRead; 2av*o~|J*: while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) Zct!/u9 Q { z1#oWf{* nStartPos += fileAccessI.write(b,0,nRead); ,^HS`!s[ E //if(nThreadID == 1) (N7O+3+G // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); ve6x/ PD } SijS5irfk $ND90my
|g+! Utility.log("Thread " + nThreadID + " is over!"); } +1'{B"I bDownOver = true; sx:Hv1d //nPos = fileAccessI.write (b,0,nRead); uQWp+}>ZJy } 4AuH1m)< catch(Exception e){e.printStackTrace ();} O hi D } v O PMgEI } !n:uiwh ]b> pI; (ZS/@He //打印回应的头信息 wz h.$?~ public void logResponseHead(HttpURLConnection con) ~+=E"9Oo { UUGe"]V^g: for(int i=1;;i++) YlrB@mE0n$ { sLZ>v String header=con.getHeaderFieldKey(i); Et.j1M|g if(header!=null)
] ;&"1A //responseHeaders.put(header,httpConnection.getHeaderField(header)); VJ*\pM@no Utility.log(header+" : "+con.getHeaderField(header)); $3]b>v else ~x\Cmu9` break; lf6|. } -(
(Z@T1k } Y|:YrZSC ,&[7u9@ $M39 #a public void splitterStop() fy`+Efuj { ![).zi+m bStop = true; o _(0 } oE6|Zw 4
A5t*e >IBTBh_ka } z,avQR& X% X$Y6 P2t_T'R} /* 1#q^uqO0 **FileAccess.java 3(C :X1 *//文件访问(定位,写) *<xrp*O package NetFox; |_, /u_ import java.io.*; =q5@,wN^ vlu$!4I /'\;8A$J` public class FileAccessI implements Serializable{ +YuzpuxjJ j %H`0 //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 SOs,) RandomAccessFile oSavedFile; iE=P'"I long nPos; 3p&jLFphL Dp`HeSKU^ ?&xlT+JM public FileAccessI() throws IOException V~[:*WOX { ^SAq^3^P! this("",0); "$DldHC } :/i~y $t =zOeb/ +6oG@ public FileAccessI(String sName,long nPos) throws IOException MJ\r 4n { pC^2Rzf oSavedFile = new RandomAccessFile(sName,"rw"); B=dseeG[To this.nPos = nPos; hiN/S|JN8y oSavedFile.seek(nPos); :3 y_mf> } C\A49q !k-` eJ| n,sY\=vB public synchronized int write(byte[] b,int nStart,int nLen) `.8UKSH+ { vhpvO>Q int n = -1; (6clq:c7j try{ K$ AB} Fvc oSavedFile.write(b,nStart,nLen); cix36MR_ n = nLen; "{ FoA3g| } :,^>d3k catch(IOException e) C_Gzv'C"L { r.<JDdj e.printStackTrace (); h)@InYwu7 } { 8p\Y 7wi%j! az2Xch] return n; {(Fe7,.S3 } W+hV9 ;RHNRVP Ia7D F' } 4|f}F N,|r1u 9X# 7=3O^=Q^Q /* IT&i,`cJ~F **SiteInfoBean.java 1.0J2nZpt */ 9^\hmpP@D package NetFox; J3IRP/*z K'Spbn!nC 75AslL?t public class SiteInfoBean { ~6HDW -l[jEJS} k FLT!k private String sSiteURL; //Site's URL U&Ab#m; private String sFilePath; //Saved File's Path oIxH 3T private String sFileName; //Saved File's Name 7P*Z0%Q private int nSplitter; //Count of Splited Downloading File \O? u* |_nC6; +nQ!4 public SiteInfoBean() <T4(H[9B {//nSplitter的缺省值为5 *8UYS A~v //default value of nSplitter is 5 yoU2AMH2D^ this("","","",5); [pR)@$"k' } Nb1J ~v O9e.=l Spo+@G public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) TPK@*9rI { OZT^\Ky_l sSiteURL= sURL; m^A]+G#/ sFilePath = sPath; i~8DSshA sFileName = sName; jsdBd2Gdc this.nSplitter = nSpiltter; :o$@F-$k WIG=D{\Yx qiU5{} } xFwXW) ETm]o
^IgS public String getSSiteURL() H%C\Uz"o { m}pL`:e! return sSiteURL; ~p^7X2% ! } _[JkJwPTx LzE/g)> i@6wO?Tv public void setSSiteURL(String value) 1J'pB;.]s { v
F[CWV. sSiteURL = value; _.=`>%, } bg1un@%!l A$<>JVv 4 l1 i>_R public String getSFilePath() QT;Va#a { |z+9km7, return sFilePath; Q"'V9m7
i } c _mq n}:t< NQR^%<hU public void setSFilePath(String value) a[ i>;0 { lC2?sD$ sFilePath = value; sX5sL } !&JiNn(' J|q^+K r w\D>}\ public String getSFileName() yZ~b+=UM { <tW:LU(! return sFileName; s ^3[W0hL } RpAiU avy=0Jmj ENyAF%6 public void setSFileName(String value) 0T0/fg(o { N33AcV!*8 sFileName = value; ~?-qZ<9/ } FF3&Y^+^" RF!'K
ko tIp{},bQ^ public int getNSplitter() 4(8<w cL { "qgu$N4/> return nSplitter; hv{87`L'K( } &D)2KD"N 5}7ISNP;f k#?|yP: public void setNSplitter(int nCount) #Z!#;%S { k{{hZ/om nSplitter = nCount; jiq2 x\\! } C/y(E|zC$ } *:[b'D!A ]<q'U> N c(E,&{+E /* |mvM@V;^8{ **Utility.java B#:E?a;{ */ i3d y package NetFox; gZ*hkKN6 EU9[F b]
aH public class Utility { M2L0c? `yx56 ([tG y public Utility() N"K\ick6J { p&uCp7]U #?Wo <]i "5h_8k~sQ } Y6a$gXRT );!dg\U //线程睡眠 0H<4+
*`K public static void sleep(int nSecond) Qj:{p5H' { ^^eV4Y5`+ try{ GeVc\$K- Thread.sleep(nSecond); boIVU`F-! } VT
Vm7l catch(Exception e) [*tU}9 { L*v93;|s e.printStackTrace (); a 1NCVZ } ,;c{9H } [{?;c+[ %~G0[fG //日志 7fUi?41XA public static void log(String sMsg) K# /Ch5? { _En]@xK3& System.err.println(sMsg); \k4M{h6 } `k!UjO72 VSx%8IM+X 5qeT4|
Ol public static void log(int sMsg) z}D#WWSxf { a~6ztEhGm System.err.println(sMsg); WVinP(#nfM } C9G U6Ao } FU'^n6[<B ]gEu.Nth` H RWZ0 ' /* Qf"6PJ **TestMethod.java 9*f2b.Aj */ JE/l#Q! package NetFox; 7L1\1E:! V2lp7" Z"4VHrA public class TestMethod { %}\ vW 3LT+9ad2d Wn2Ny jX public TestMethod() :~-)Sm+^ { ///xx/weblogic60b2_win.exe C:WtCAm( try{ \YjB+[. SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); _!|=AIX //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); |+>%o.M&i SiteFileFetch fileFetch = new SiteFileFetch(bean); UUZ6N ZQI fileFetch.start(); 0c%@e2(N } *;>V2!N=U catch(Exception e){e.printStackTrace ();} -WQ_[t9l z<FV1niE Z3LQl( } +#^sy> #rqyy0k0'h f_^ix public static void main(String[] args) Z $ p^v*y { }G"r3*
new TestMethod(); mrhsKmH } Wm];p qN } 5d)'`hACe 点击下载更多相关资料
|