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/* :8CYTEc **SiteFileFetch.java @8$3Q,fF( */ V1
:aR3*! package NetFox; /iwL$xQQ import java.io.*; H"n@=DMLm import java.net.*; pRTdP/(OQ nWzGb2Y M,WC+")Z= public class SiteFileFetch extends Thread { 4hLv"R. Rc.8j,] a+_F^ SiteInfoBean siteInfoBean = null; //文件信息Bean }2;{}J long[] nStartPos; //开始位置 Ozo)} long[] nEndPos; //结束位置 km[PbC
FileSplitterFetch[] fileSplitterFetch; //子线程对象 ;A3aUN;"I long nFileLength; //文件长度 3L5o8?[ boolean bFirst = true; //是否第一次取文件 |TE\ ] boolean bStop = false; //停止标志 rf:CB&u File tmpFile; //文件下载的临时信息 noLb DataOutputStream output; //输出到文件的输出流 ~p'DPg4 `
g5S //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) h=`1sfz public SiteFileFetch(SiteInfoBean bean) throws IOException uV'w0`$y { ;^cc-bLvF siteInfoBean = bean; HbUadPr //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); ,VTX7vaH tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); 1r-#QuV# if(tmpFile.exists ()) N:yyDeGyW { (8?5REz bFirst = false; ap%
Y} read_nPos(); FhyA_U%/nF } MY$-D+#/` else SyWLPh { G"'[dL)N> nStartPos = new long[bean.getNSplitter()]; b#2$Pd:( nEndPos = new long[bean.getNSplitter()]; q&y9(ZvI } cYafQyU )b_
GKA
` ^9zFAY.| `Y5{opG7- } G;CB%qXI *G,'V,? V.8pxD5s public void run() aRh1Q=^@(4 { ?7:?OX //获得文件长度 6IQkP9P( //分割文件 @jp}WwC/ //实例FileSplitterFetch wV,l }Xb- //启动FileSplitterFetch线程 fsxZQ=-PW //等待子线程返回 '+Gy)@c try{ nYv`{0S+m if(bFirst) ;%V%6:5 { oF(<}0Z nFileLength = getFileSize(); 1Z+\>~8 if(nFileLength == -1) ?[ts<Ltp { 5jYZ+OB System.err.println("File Length is not known!"); .vbUv3NI } 2'8$I}h else if(nFileLength == -2) ]("5O V5 { BW61WH? System.err.println("File is not access!"); W,[b:[~v } Y8fahQ# else s=uWBh3J { [9O,C-Mk for(int i=0;i<nStartPos.length;i++) Y.<&phv { ^6Std
x_ nStartPos = (long)(i*(nFileLength/nStartPos.length)); &>Ko}?w } VgSk\:t for(int i=0;i<nEndPos.length-1;i++) !/},k"p6 { ^uy2qO4Yw nEndPos = nStartPos[i+1]; 9b0M'x'W5 } oo:(GfO} nEndPos[nEndPos.length-1] = nFileLength; WG_20JdJY } g7|$JevR0 } l5m5H,` aC&ZV}8of l^F%fIRp) //启动子线程 *FwHZZ~U fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; ZL-YoMHc+_ for(int i=0;i<nStartPos.length;i++) l{{wrU` { {c3u!}mW fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), nA\9UD<G. siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), W:8*Z8?7 nStartPos,nEndPos,i); n tfwR#j Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); .o2]ndT/J fileSplitterFetch.start(); nVTCbV } b$24${*' // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), WG{mg/\2(C siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); ;gh#8JkI // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", yvgn}F{} nEndPos = " + nFileLength); -bamNw>| // fileSplitterFetch[nPos.length-1].start(); e*Gm()Vu, }^Unx W ~9:ILCfX //等待子线程结束 ;9{x"" //int count = 0; oH/4opV //是否结束while循环 ">n38:?R boolean breakWhile = false; 5K;vdwSB uh~/ybR [\M=w7 while(!bStop) GnE%C2L- { #nE%.k|R~ write_nPos(); )Tc eNH Utility.sleep(500); ;
)Vro breakWhile = true; 7-oH >OF^ JeR8Mb brkR,(#L3 for(int i=0;i<nStartPos.length;i++) iI[Z|"a 21 { ZD9UE3- if(!fileSplitterFetch.bDownOver) U8Pnt|0 M { H?M#7K~[ breakWhile = false; C*}TY)8 break; %`%xD>![ } 8?GS :+ } rAdYBr=0 if(breakWhile) fq){?hk~O break; M-!eL< A2o;YyF `L(AvSR //count++; g8yWFqE!T //if(count>4) kO:iA0KUX // siteStop(); w#Y<~W& } 8c m,G [?<"SJ,` G
.~Psw# System.err.println("文件下载结束!"); |H.(?!nTb } GNXQD}L?b? catch(Exception e){e.printStackTrace ();} ?Uzs^rsb } uc?QS~H&w f[n#Eu} X[8m76/V //获得文件长度 (lhbH]I public long getFileSize() {m9OgR5U { }Po&6^ int nFileLength = -1; b|T}mn try{ "t+VF4r URL url = new URL(siteInfoBean.getSSiteURL()); G 3P3 HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); (=${@=!z httpConnection.setRequestProperty("User-Agent","NetFox"); ,jyNV<dI 3LZ0EYVL XF1x*zc int responseCode=httpConnection.getResponseCode(); XljiK8q;% if(responseCode>=400) 8jxgSB", { WlVC0& processErrorCode(responseCode); QQKvy0?1 return -2; //-2 represent access is error M:c^[9)y } 0@E[IDmp 7-+X -Y? 5gg_c?Vh/ String sHeader; B`a5%asJn lhAwTOn`Q -^8gZk/(W for(int i=1;;i++) MpM-xz~ { -IJt( X| //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); qFmvc //Utility.log(in.readLine()); KcVCA sHeader=httpConnection.getHeaderFieldKey(i); 4E:HO\ if(sHeader!=null) p"/1Kwqx { OWCd$c_( if(sHeader.equals("Content-Length")) E9{Gaa/{ { .eW}@1+[; nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); %;9f$:U break; G*e/Ft.wf8 } +Ij>\;vM" } .l5y!? else Zb`}/%\7 break; pL>Q'{7s3 } kRnh20I } +L*2 6ar6 catch(IOException e){e.printStackTrace ();} M)6_Tal catch(Exception e){e.printStackTrace ();} GAbX.9[V noa?p&Y1m 2}1(j Utility.log(nFileLength); i NzoDmE* @!^c@ q~.\NKc return nFileLength; _h7! } .Xh ^L \?h + /iNCb&[ //保存下载信息(文件指针位置) #ldNWwvRGj private void write_nPos() 0)-l9V { ^~|P[} try{ S0 M-$ output = new DataOutputStream(new FileOutputStream(tmpFile)); a3ve%b output.writeInt(nStartPos.length); dx}()i\@ for(int i=0;i<nStartPos.length;i++) l%.3hId- { ):jKsP
, // output.writeLong(nPos); =(K;z9OR output.writeLong(fileSplitterFetch.nStartPos); ho
?.\Jq output.writeLong(fileSplitterFetch.nEndPos); EbuOPa } ^%|{>Mz;c output.close(); Lo @mQ } lQ!ukl) catch(IOException e){e.printStackTrace ();} ZU7e1VaZM catch(Exception e){e.printStackTrace ();} yC4JYF]JN } o\1"ux;b *-T3'beg .
[+ObF9= //读取保存的下载信息(文件指针位置) KWCA9.w4q private void read_nPos() YN9ug3O+ { v-Ggf0RF try{ T/MbEqAf DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); 1\{0z3P int nCount = input.readInt(); #* j nStartPos = new long[nCount]; 1C^6'9o nEndPos = new long[nCount]; DY^q_+[V for(int i=0;i<nStartPos.length;i++) jY$Bns&.w { :e ?qm7 cB nStartPos = input.readLong(); [zn`vT nEndPos = input.readLong(); ,'m<um } 0!o&=Qh input.close(); cgc|G } "]JE]n}Ulg catch(IOException e){e.printStackTrace ();} fOm=#:O catch(Exception e){e.printStackTrace ();} ?o$6w(]'' } (ScL C Uc!}D "X's>uM private void processErrorCode(int nErrorCode) [IF3,C { Ti#2D3 System.err.println("Error Code : " + nErrorCode); #q9jFW8 } &48wa^d bk}.^m! Dsw(ti`@ //停止文件下载 ^,
q\S public void siteStop() .AH#D}m { ]MfT5#(6h bStop = true; }ARWR.7Cc for(int i=0;i<nStartPos.length;i++) tmDI2Z%7 fileSplitterFetch.splitterStop(); ~ULuX"n K:c5Yq^ :@KWp{ D7 } _S{HVc } -i:Zi}f //负责部分文件的抓取 Uxn_nh **FileSplitterFetch.java m!er"0 */ ea3AcT6 package NetFox; aDm$^yP *$Aneq0f j0>S)Q import java.io.*; k+5:fB)z import java.net.*; J)oa:Q D*|h
c wWko9h=|mQ public class FileSplitterFetch extends Thread { "KcSOjvJ rOm)s' 2shr&Mfp[ String sURL; //File URL UN'hnqC long nStartPos; //File Snippet Start Position cAM1\3HWT" long nEndPos; //File Snippet End Position
1t+]r:{ int nThreadID; //Thread's ID Jt43+] boolean bDownOver = false; //Downing is over 'C]zB'H= boolean bStop = false; //Stop identical aAh")B2 FileAccessI fileAccessI = null; //File Access interface <8|vj2d2 -A(]",*J bqJL@!T public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException ^6Q(he { f]^(|*6 this.sURL = sURL; y>'^<xk this.nStartPos = nStart; %0YwaxXPn7 this.nEndPos = nEnd; #.$p7] nThreadID = id; _&FcHwRy fileAccessI = new FileAccessI(sName,nStartPos);//定位 Qf6]qJa| } E}-Y@( [ /(8Usu?g. +_|M*% public void run() "[L[*>[9! { yBXdj`bV while(nStartPos < nEndPos && !bStop) B'"C?d<7 { SouPk/-B80 k?0yH$)'t .e!dEF)D try{ - U!:. URL url = new URL(sURL); @QV|<NeH HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); JBtcl#| httpConnection.setRequestProperty("User-Agent","NetFox"); F8$.K*tT String sProperty = "bytes="+nStartPos+"-"; K{B[(]( httpConnection.setRequestProperty("RANGE",sProperty); k {_X%H/ Utility.log(sProperty); sn
'#]yM }o0R`15dA j#$ R. InputStream input = httpConnection.getInputStream(); tH,}_Bp //logResponseHead(httpConnection); zGHP{a1O7 DlC`GZEtqh U=\ZeYK. byte[] b = new byte[1024]; dqwAQ-x int nRead; c}kZx1 while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) R(@B4M2 { }OZ%U2PU nStartPos += fileAccessI.write(b,0,nRead); a FjcyD //if(nThreadID == 1) v:
cO+dQ // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); bccJVwXv } ;:,hdFap |'9%vtbM lCLz!k2di Utility.log("Thread " + nThreadID + " is over!"); N`1:U
4} bDownOver = true; 9G_bM(q'^2 //nPos = fileAccessI.write (b,0,nRead); L}UJ`U } /.9j$iK# catch(Exception e){e.printStackTrace ();} + ObP[F } 6+u}'mSj8 } }J73{ Gl}[1<~o eu@hmR8T //打印回应的头信息 td%]l1 public void logResponseHead(HttpURLConnection con) |b7v(Hx { `[3Iz$K= for(int i=1;;i++) fw$/@31AP? { 3/>T/To&2 String header=con.getHeaderFieldKey(i); 9\ZlRYnc= if(header!=null) &b8Dy=# //responseHeaders.put(header,httpConnection.getHeaderField(header)); nAPSs]D Utility.log(header+" : "+con.getHeaderField(header)); f2ygN6(> else Aw9se"d break; @8E mY,{; } =cI -<0QSn } Tj7OV}: E/2 kX 3} ^
cpQ*Fz public void splitterStop() Dg3Sn|!f { !2R~/Rg bStop = true; Sm(X/P=z } Bd jo3eX 4XpW#> R#gt~]x6k } $*w]]b$Dn -x)Oo` q}P< Ejq} /* DuX7 **FileAccess.java ,rj_P *//文件访问(定位,写) %EkV-%o* package NetFox; hr3RC+ y import java.io.*; 6-#<*Pg tS#=I.ET nAIV]9RAZ% public class FileAccessI implements Serializable{ $I*ye+a*{q j_H"m R //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 8CCd6)cG RandomAccessFile oSavedFile; ERD( qL.J long nPos; 7i^7sT8t K8`Jl=}z%& sjl( public FileAccessI() throws IOException Xq:jp+WSG { Nfe this("",0); _+Tq&,_:o } .m%/JquMFM U8TH} 9Q }]O*
yFR{j public FileAccessI(String sName,long nPos) throws IOException fLkZ'~e! { tuH8!. oSavedFile = new RandomAccessFile(sName,"rw"); #9{N[t this.nPos = nPos; -M=#U\D oSavedFile.seek(nPos); ,36AR|IO) } .U}"ONd9e u /PaXQ @c3GJ'"X public synchronized int write(byte[] b,int nStart,int nLen) DD 8uG`< { Cka&b int n = -1; i,#j@R@.C7 try{ #?=?<"*j oSavedFile.write(b,nStart,nLen); 8{DZew / n = nLen; ;Q YUiR } Iw@ou catch(IOException e) "rxhS;
R1> { +5:Dy,F= e.printStackTrace (); >4I,9TO } poLzgd +=.>9 ,Sz`$'^c return n; IQz"FH? } t<8vgdD `Wc"Ix0 Ug :3)q[O } etnq{tE5 ;/-v4 7kiZFHV /* ^:krfXT **SiteInfoBean.java ~yX8p7qr */ p2m@0ou package NetFox; eXs^YPi \!-IY `.oWmBey\ public class SiteInfoBean { _xKu EU} ^Om0~)"q a7$]"
T 7 private String sSiteURL; //Site's URL JAt$WW{ private String sFilePath; //Saved File's Path [w*t(A private String sFileName; //Saved File's Name m-xnbTcQ private int nSplitter; //Count of Splited Downloading File xi+bBqg<.K X283 . ? R_DstpsT public SiteInfoBean() ot%^FvQ[c {//nSplitter的缺省值为5 2wCSjAWWh( //default value of nSplitter is 5 Gy;>.:n this("","","",5); #'5C*RO } 8-JOfq}s !xE/ 3t4i2] public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) =D>,s)}o3; { c[IT?6J4 sSiteURL= sURL; Etj0k}
A sFilePath = sPath; E{wnhsl{ sFileName = sName; ^uWPbW&/q this.nSplitter = nSpiltter; z`Jcpt |]M|IX8
o ,H)v+lI } }]<Ghns ]2_b_ok &g;&=<#I public String getSSiteURL() (yJY/| { 04j]W]8# return sSiteURL; '!hA!eo>J } `i2:@?Kl9 " jBc5* 7^oO
N+=d public void setSSiteURL(String value) h&|S* {
DXa!"ZU sSiteURL = value; o){\qhLp } a 23XrX Xf YbWR sk%Xf, public String getSFilePath() R9&3QRW| { [yhK4A return sFilePath; Bs3M7zRG } {i^F4A@=Z d}w}VL8l <G_71J`MLC public void setSFilePath(String value) U [R[VY7 { 2JhE`EVH sFilePath = value; `DFo:w!k } h(/& ;\Cr 0'ge}2^
=j"bLX6; public String getSFileName() ?8/T#ox { 3sK^
( return sFileName; 5-RA<d# } .WVIdVO7 hDf!l$e. h
J H public void setSFileName(String value) 96d&vm~m1 { so>jz@!EE sFileName = value; tuslkOE# } rU
|% re xMS m7|S'{+! public int getNSplitter() [y&uc { rNoCmNm return nSplitter; iOB*K)U1 } |vPU]R>6 A
D%9;KQ8 [85b+SKW public void setNSplitter(int nCount) bcYGkvGbO { :I2spBx nSplitter = nCount; (5l'?7 } o&)v{q } w&>*4=^a .^wBv
'Y _/NPXDL /* *pYawT **Utility.java 0C4Os p */ L>n^Q:M package NetFox; T[- %b9h> q\/xx`L .umN>/o[ public class Utility { ge ]Z5E(1 ~cf)wrP a/n~#5- public Utility() `0`#Uf_/$ { -FS!v^ bQ-n<Lx l%
p4.CX } R(s[JH(& sWKv>bx //线程睡眠 %3yrX>Js public static void sleep(int nSecond) 63'L58O { j>3Fwg9V try{ XEUS)X) Thread.sleep(nSecond); l%qfaU2 } R@KWiV catch(Exception e) mr,GHx { I:WPP'L4o e.printStackTrace ();
#!> `$ } F(`Q62o@ } @9lGU# "?6R"Vk?: //日志 iV:\,<8d public static void log(String sMsg) CoV@{Pi { Yc5<Y-W System.err.println(sMsg); }tJMnq/m($ } -|P7e MfraTUxIo/ @ev^e!B public static void log(int sMsg) q)PSHr=Z { I*KJq?R System.err.println(sMsg); #fFD|q } z=4E#y`?U } @"iNjqxh PPh1y;D )O\l3h" /* xOZvQ\% **TestMethod.java &<) _7? */ )+.AgqxI package NetFox; Cyud)BZvm y*8;T v| BbI),iP public class TestMethod { lEpPi@2PK yCv"(fNQ 7KtgR=-Lb public TestMethod() 3ep
L'My$ { ///xx/weblogic60b2_win.exe F|&mxsL try{ VKi3z%kwK SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); *T{KpiuP //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); R~bLEo SiteFileFetch fileFetch = new SiteFileFetch(bean); ik0w\* fileFetch.start(); l4OPzNc' } wDs#1`uTq catch(Exception e){e.printStackTrace ();} }U b "Vb 6uFGq)4p@ JM*rPzp } *oIKddZh v=H!Y"; @T-}\AU public static void main(String[] args) Q1
vse { Bc#6mO- new TestMethod(); w2tkJcQ3 } 16I(S } B^1 Io9 点击下载更多相关资料
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