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/* ees^O{ 8 **SiteFileFetch.java IM2/(N.% */ Bzwx0c2VY8 package NetFox; t-a`.y import java.io.*; *@=fq|6l 2 import java.net.*; @YbZ8Uc TyyRj4> k@lXXII ? public class SiteFileFetch extends Thread { 4jPwL|# N+[}Gb"8q Xd5!
Ti} SiteInfoBean siteInfoBean = null; //文件信息Bean %!#rrt,F long[] nStartPos; //开始位置 MgSp.<! long[] nEndPos; //结束位置 ~|J*E38 FileSplitterFetch[] fileSplitterFetch; //子线程对象 FW5*_%J long nFileLength; //文件长度 G-Zr M boolean bFirst = true; //是否第一次取文件 Ed8U;U b boolean bStop = false; //停止标志 FK?mS>G6 File tmpFile; //文件下载的临时信息 +KYxw^k}"7 DataOutputStream output; //输出到文件的输出流 Ig='a"% B1up^(? //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) yg.\^C public SiteFileFetch(SiteInfoBean bean) throws IOException 6Eij>{v { ,5`."-0} siteInfoBean = bean; 20S9/9ll //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); #.RG1-L tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); Kn3YI9 if(tmpFile.exists ()) zT2F&y
q { 3/yt*cr bFirst = false; `mh-pBVD1 read_nPos(); `,hW;p>- } /[p?_EX@ else ZJ)3GF}4 { []sB^UT nStartPos = new long[bean.getNSplitter()]; jcT{ugpq nEndPos = new long[bean.getNSplitter()]; M^!C?(Hx^x } I%.jc2kK Ki&WS<,0Z L5i#Kh_ >;T$#LZ } nEeQL~: 2D\x-!l/ BLsdx} public void run() ^\Ue7,H- { EIy]qAE:f //获得文件长度 U4
go8 //分割文件 G
"c&C //实例FileSplitterFetch %N?W]vbra
//启动FileSplitterFetch线程 *FI5z[8, //等待子线程返回 Xs.$2 try{ /*mFP.en if(bFirst) GgZEg
?@ { 4w?]dDyc% nFileLength = getFileSize(); E.WNykF- if(nFileLength == -1) i`ZHjW~` { ly[\mGr System.err.println("File Length is not known!"); {d*qlztO } 5Xq.=/eX else if(nFileLength == -2) 5 O{Ip- { 0k .# System.err.println("File is not access!"); `% #zMS } ouu-wQ|(mM else 7><*
9iOW { Ot4; ,UZ for(int i=0;i<nStartPos.length;i++) *cI6&;y {
?fqkM nStartPos = (long)(i*(nFileLength/nStartPos.length)); K"t:B } |P[D2R} for(int i=0;i<nEndPos.length-1;i++) \M3NasZ { _z"ci$[ nEndPos = nStartPos[i+1]; C4X{Ps\ } y<Z#my$`|n nEndPos[nEndPos.length-1] = nFileLength; -h^} jP8 } k8t Na@H } X<@y*?D9D :g]HB,78 pyb}ha //启动子线程 =^%Pwkz fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; eiNk]KXAYX for(int i=0;i<nStartPos.length;i++) :n%sU*'T { qkR,<"C|` fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), *9U4^lJjn siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), uq#h\p| nStartPos,nEndPos,i); 51FK~5 Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); "8j;k5< fileSplitterFetch.start(); xhVq } s+\qie // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), l2KxZteXY0 siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); g`f6gxc // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", QWQ6j#` nEndPos = " + nFileLength); Kt&$Si // fileSplitterFetch[nPos.length-1].start(); GXvo't@N 9rvxp; V
n!az} //等待子线程结束 :QhEu%e //int count = 0; ur"e
F //是否结束while循环 ;0_J7 boolean breakWhile = false; %` uRUex odT7Gq d_?Zr`: while(!bStop) 3M:B?2 { x2IU PM write_nPos(); _F$t#.o Utility.sleep(500); m^u&g&^ breakWhile = true; lO[jf6gB < $?}^
0R V;+$/>J`vB for(int i=0;i<nStartPos.length;i++) )k%drdY{J' { JU,ROoz( if(!fileSplitterFetch.bDownOver) CCvBE, ux { `/j|Rb|eow breakWhile = false; ,8 -_=* break;
'jl XLb } [ BC%$Sj } 1AkHig, if(breakWhile) N(/<qv break; 8&[<pbN) "Ohpb!J9 $j2)_(<A%Q //count++; ua>~$`@gX //if(count>4) 3V!&y/c< // siteStop(); F^bQ- } 5z mHb d"`>&8*
ex!wY System.err.println("文件下载结束!"); Vwg|? sG_ } cb&In<q catch(Exception e){e.printStackTrace ();} kITmo"$K } _eeX]xSSl ?-& D' +dpj? //获得文件长度 Gqb-3ngH public long getFileSize() i1\ /\^ { QN8Hz/}\ int nFileLength = -1; W_n.V" hN try{ 72.IhBNtT URL url = new URL(siteInfoBean.getSSiteURL()); 4zDAfi#0 HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); 9NXiCP9A httpConnection.setRequestProperty("User-Agent","NetFox"); _llaH l0 :xQV` \@"
.
GM% int responseCode=httpConnection.getResponseCode(); BcO2* 3 if(responseCode>=400) i4Cb&h^ { KKJ [ processErrorCode(responseCode); t|"d#5' return -2; //-2 represent access is error ghR]$SG } PBnn,# 7%}}m&A7h HCy} '}d String sHeader; *fX)=?h56 <
l ^ Z;. =9MH for(int i=1;;i++) (pNng"/ { FLOJ //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); u<2sb;a //Utility.log(in.readLine()); 5E(P,!-. sHeader=httpConnection.getHeaderFieldKey(i); L%Hm#eFx if(sHeader!=null) yKhzymS}T { @= 9y5r if(sHeader.equals("Content-Length")) }#^F'%zf { oIgj)AY< nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); tC~itU=V break; :|Ty 0>k } h"S/D[ } l'f!za0 else mmK_xu~f28 break; q0<`XDD` } =Bx~'RYl1d } KPqI( catch(IOException e){e.printStackTrace ();} E/ )+hK& catch(Exception e){e.printStackTrace ();} IGQ8-#= <3CrCEPC :]jtV~E\ Utility.log(nFileLength); __npX_4%S w!M ^p&T7 6*Qpq7Ml return nFileLength; ^Y |s^N } [i _x
1 Ca|;8ggf C(hg"_W ou //保存下载信息(文件指针位置) \)WjkhG<w# private void write_nPos() X2Mj|_#u { n4,J#h/ try{ | w -W=v output = new DataOutputStream(new FileOutputStream(tmpFile)); +(0eOO'\M output.writeInt(nStartPos.length); =G6@:h= for(int i=0;i<nStartPos.length;i++) %4J?xhd { V:18]: // output.writeLong(nPos); :f:C*mYvu output.writeLong(fileSplitterFetch.nStartPos); RPwSo.c4 output.writeLong(fileSplitterFetch.nEndPos); `!N?#N:b) } 471}'3 output.close(); Y.J$f<[R } {wySH[V catch(IOException e){e.printStackTrace ();} vD t?N9 catch(Exception e){e.printStackTrace ();} s]UeDZ<a } )1le- SC 6yqp<D0SP) 7dZ!GX?\y //读取保存的下载信息(文件指针位置) T8LwDqio private void read_nPos() >E3OYa?G { `N+ P, try{ u#<]>EtbB DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); PoZBiw@ int nCount = input.readInt(); t|%ul6{gz nStartPos = new long[nCount]; A\>qoR!Y nEndPos = new long[nCount]; '1<QK for(int i=0;i<nStartPos.length;i++) gqd#rjtfz { 4j5plm= nStartPos = input.readLong(); XOMWqQr| nEndPos = input.readLong(); gC_U7a w } IV76#jL input.close(); ,O(uuq } %|Vq"MW,I catch(IOException e){e.printStackTrace ();}
Ox RzKT catch(Exception e){e.printStackTrace ();} K9c:K/H } [/FIY!nC? \oyr[so(i u56cT/J1 private void processErrorCode(int nErrorCode) cVN|5Y { qmhHHFjQ System.err.println("Error Code : " + nErrorCode); ?]S*=6 } LvS` >Uz3F7nHi t+t&eg //停止文件下载 Y&nY]VV public void siteStop() U<$ |ET' { -4.+&' bStop = true; {.v+ iSM for(int i=0;i<nStartPos.length;i++) h8Gp>b fileSplitterFetch.splitterStop(); YvonZ HjrCX>v o&zeOJW } -O\`G<s% } 5 Jd,]~KAP //负责部分文件的抓取 0oD?4gn **FileSplitterFetch.java 'Q# KjY */ /) N[tv2 package NetFox; 72aj4k]^ "Mth<%i rLVS#M#&e> import java.io.*; 278
6tZF, import java.net.*; ."${.BPn~ dbw`E"g \%UA6uj public class FileSplitterFetch extends Thread { _|3n h;-m }JS?42CTaV H'+P7*k#M String sURL; //File URL I%|W
O*x long nStartPos; //File Snippet Start Position >>p3#~/ long nEndPos; //File Snippet End Position >k"/:g^t int nThreadID; //Thread's ID k z<We/ boolean bDownOver = false; //Downing is over f5AK@]4G boolean bStop = false; //Stop identical e(cctC|l FileAccessI fileAccessI = null; //File Access interface Lf3:' n ACs?m\$Q :*1bhk8~ public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException -rUn4a { 99vm7"5 hQ this.sURL = sURL; {/N4/gu this.nStartPos = nStart; $Ad 5hkz this.nEndPos = nEnd; ~b*f2UVs
nThreadID = id; VHJOj fileAccessI = new FileAccessI(sName,nStartPos);//定位 in$Pk$ c } C,.$g>)MZK w[t!?(![> Drz#D1-2 public void run() jT%k{"+>+? { r\Zz=~![< while(nStartPos < nEndPos && !bStop) vk&C'&uV9@ { ~]3y667 O.Z<dy+ }sZme3*J[ try{ Q
u{#4qToA URL url = new URL(sURL); f3h^R20qmO HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); 46Vx)xX httpConnection.setRequestProperty("User-Agent","NetFox"); qdWsP9}q String sProperty = "bytes="+nStartPos+"-"; q<dZy? f httpConnection.setRequestProperty("RANGE",sProperty); %&0_0BU Utility.log(sProperty); ND77(I$3s a~jM^b;VN L'M'I0"/ InputStream input = httpConnection.getInputStream(); n]jZ2{g+ //logResponseHead(httpConnection); D=i)AZqMPp C;QIp6"1 QE1DTU byte[] b = new byte[1024]; ?VmEbl int nRead; 1--_E,Su> while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) -AWL :< {
Lj`MFZ nStartPos += fileAccessI.write(b,0,nRead); bdEc? //if(nThreadID == 1) NBU[> P // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); W{B)c?G] } k` cz$> n$&xVaF| (
E;!.=% Utility.log("Thread " + nThreadID + " is over!"); b;A(6^V bDownOver = true; C7:;<<"P //nPos = fileAccessI.write (b,0,nRead); R-5EztmLae } .93B@u catch(Exception e){e.printStackTrace ();} N{w)}me[YY } &]~Vft
l } qRC-+k:
I@ "%iYL $ReoIU^< //打印回应的头信息 5'*v-l,[ public void logResponseHead(HttpURLConnection con) `tZ m { h' #C$i for(int i=1;;i++) tj<a , l { 2?J[D7 String header=con.getHeaderFieldKey(i); tgz if(header!=null) 2vbm=~)$F //responseHeaders.put(header,httpConnection.getHeaderField(header)); A"ApWJ3 Utility.log(header+" : "+con.getHeaderField(header)); " b?1Yc- else MhT.Zg\ break; _ljdo`j#N } 8y:c3jzP_ } /-J12 O ]m&cVy& A 9\]y%! public void splitterStop() [R-&5 G!x { J)yNp,V bStop = true; }fzv9$]$ } !LDuCz
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kgU5 VkKq<`t< } 'Ll,HgU; $;@LPE --X1oC52A /* @!;EW
R] **FileAccess.java e(t,~( *//文件访问(定位,写) O:K={#Xj package NetFox; ~x}/>-d import java.io.*; #A&(b}#:o ? dD<KCbP, 39j "z8n public class FileAccessI implements Serializable{ %(72+B70R {Vg8pt //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 ze5Hg'f RandomAccessFile oSavedFile; kaK0'l2% long nPos; P8Nzz(JF <[N"W82p 7F=Xn@ _ public FileAccessI() throws IOException Y%1J[W { +1`Zu$| this("",0); !%pY)69gv } X^pxu6nm- DBUhqRfl =v(MdjwFl public FileAccessI(String sName,long nPos) throws IOException Z33&FUU { !`S`%\" oSavedFile = new RandomAccessFile(sName,"rw"); ,<,ige this.nPos = nPos; lP9XqQ( oSavedFile.seek(nPos); m%mA0r
} >o\s'i[ ]{`
8C rkp 1tv public synchronized int write(byte[] b,int nStart,int nLen) CTqAhL 4} { !>%U8A int n = -1; m~upTQz try{ ?zypF 5a oSavedFile.write(b,nStart,nLen); Y6_%HYI$ n = nLen; ,d^ze = }
l?_h(Cq< catch(IOException e) c^N'g!on { a{?`yO/ 2 e.printStackTrace (); =N_7DT } "K.Xo G4| zvvF9 1KH]l336D" return n; XxN=vL&m } D][e uB ."N`X\ m\3r<*q6 } 3ug|H OokBi 02b H9c /* w"-' **SiteInfoBean.java &e#>%0aS */ 5&&6e` package NetFox; q>$[<TsE&} i Sm5k:7 R@h@@lSf public class SiteInfoBean { n?@3+wG aJnZco6 IaxzkX_48 private String sSiteURL; //Site's URL "8pfLI private String sFilePath; //Saved File's Path Ch`nDIne private String sFileName; //Saved File's Name gq$]jWtCD private int nSplitter; //Count of Splited Downloading File k\:f2%!! ##%R|P3 U}c[oA public SiteInfoBean() x]({Po4 {//nSplitter的缺省值为5 ya+eGD@N': //default value of nSplitter is 5 \\j98(i this("","","",5); fO!S^<9,- } N9W\>hKaeh 5kwDmJy =c)O8 public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) QlbhQkn { !PCw-& sSiteURL= sURL; X%S9H^9 sFilePath = sPath; 8}Pd- .se sFileName = sName; $(2c0S{ 1 this.nSplitter = nSpiltter; w|6;Pf~1y) *fBI),bZa jg
~;s } YF{ KSGq ;pU#3e+P8 |51z&dG public String getSSiteURL() 'E/vE0nN? { <{C oM return sSiteURL; 4|+6a6 } 8aCa(Xu(H d2w;d&2S I,{9vew public void setSSiteURL(String value) >\Qyg>Md] { =rj5 q sSiteURL = value; c;,jb } *iSsGb\M% [CH%(#>i~ )t
G`a ; public String getSFilePath() ~o:lh],~ { ArBgg[i return sFilePath; cad%:%p } f"h{se8C C7%+1w'D8 DU g public void setSFilePath(String value) 89F^I"Im( { 2Y&QJon) sFilePath = value; #vhxW=L`= } @?_<A%hz JLT^0wBB i(q%EMf public String getSFileName() #vJDb |z { zBWn*A[4 return sFileName; MD ~03 } wU_e/+0h DSyfF&uC be `\ O public void setSFileName(String value) y\Z7]LHCqw { V7u;"vD sFileName = value; \p"`!n } *]%{ttR~ SP9_s7LL )*N]Q public int getNSplitter() /jih;J| { XGZ1a/x;s return nSplitter; ;4of7d } z.{T`Pn EBS04]5ul G S-@drZp_ public void setNSplitter(int nCount) }6}Gj8Nb { v\ggFrG] nSplitter = nCount; [E_6n$w } :(,uaX>{ } %fMK^H8{ o
Y_(UIa uW!',"0ER /* ]ERPWW;^ **Utility.java [gFpFz|b< */ kpi)uGvGUA package NetFox; YC4S,fY` )BudV zg H2 7_T]\ public class Utility { s"`uE$6N ^R\0<\' tG(?PmQ public Utility() Qjh5m5e { {E!ie{~ L%9DaK UOH2I+@V } TYW$=p| M >Yx_)<U //线程睡眠 N~g@ public static void sleep(int nSecond) :P<}
bGN { B<(v\=xZ try{ ?UnOi1"v9 Thread.sleep(nSecond); =Y>_b
2 } @ae;& catch(Exception e) IQxY]0\uf6 { ,TaaX I e.printStackTrace (); wQJY,|. } .%;UP7g } ^yg`U( MHmaut# //日志 Se+sgw_" public static void log(String sMsg) hu.c&Q> { %k
@ "* System.err.println(sMsg); szN`"Yi){ } jdiFb~5R 2V7x _3- nw public static void log(int sMsg) $EHAHNL?Lx { p*E_Po System.err.println(sMsg); |&lAt\ } )3PQ|r' } &NiDv =qiX0JT pB;)Hii\ /* J(F]?H **TestMethod.java `G>
6 */ YqwDvJWX package NetFox; *e{d^ fl>*>)6pm :J` *@cDn public class TestMethod { [ah%>&u {t`UV, >:%YAR` public TestMethod() W#!![JDc { ///xx/weblogic60b2_win.exe ZOvMA]Rf try{ v[WbQ5AND SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); 7@al)G;~ //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); 6n37R#( SiteFileFetch fileFetch = new SiteFileFetch(bean); 8" l9W= fileFetch.start(); 1V(tt{ } 6O2 r5F$T catch(Exception e){e.printStackTrace ();} o!EPF-: Tx"}]AyB6 @q2If{Tk } l}B,SkP^ $$8xdv# w
A<JJ_R public static void main(String[] args) =+ `I%>wc { S?*pCJ0 new TestMethod(); 99 /fI } >v^Bn|_/ } H)aeSF5 点击下载更多相关资料
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