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/* PX?^v8wlqL **SiteFileFetch.java q'X#F8v */ F^=y+}]= package NetFox; Y$qjQ 1jF+ import java.io.*; YC*`n3D|' import java.net.*; !Uhc jfq`e X-j<fX_ y35e3 public class SiteFileFetch extends Thread { CdtwR0 ^6!8)7b )>;387'Y SiteInfoBean siteInfoBean = null; //文件信息Bean NpGz y`&b long[] nStartPos; //开始位置 bF +d_t long[] nEndPos; //结束位置 PK_2 FileSplitterFetch[] fileSplitterFetch; //子线程对象 Y)M-?|4 long nFileLength; //文件长度 T%YN(f boolean bFirst = true; //是否第一次取文件 4!?4Tc!X boolean bStop = false; //停止标志 a4q02 cV File tmpFile; //文件下载的临时信息 eYv+tjIF DataOutputStream output; //输出到文件的输出流 =v{ R(IX% ksYPF&l //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) A=*6|1w; public SiteFileFetch(SiteInfoBean bean) throws IOException $! g~pV { |CBJ8],mT siteInfoBean = bean; KF`mOSP //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); 8yuTT^ tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); Imo?)dYK if(tmpFile.exists ()) :a( Oc'T { mt-t8~A bFirst = false; =]<X6!0mR read_nPos(); u:^9ZQ+ } ^)3=WD'! else ,^@/I: { ~UsE"5 nStartPos = new long[bean.getNSplitter()]; ,JJ1sf2A nEndPos = new long[bean.getNSplitter()]; )_Iu7b } ;y>}LGG $^#q0Yx ,awkL
: L 1q] } Q:Y`^jP "m}N
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1J;RF public void run() j<L!(6B { O%Qz6R //获得文件长度 sWP_fb1 //分割文件 |j$$0N //实例FileSplitterFetch 8:
VRq //启动FileSplitterFetch线程 h>/L4j*Z //等待子线程返回 N,ZmGzNP) try{ RRGs:h@; if(bFirst) krXU*64 { !nF.whq nFileLength = getFileSize(); pq]>Ep if(nFileLength == -1) (T.g""N~` { ^3Z~RK\} System.err.println("File Length is not known!"); pEb/ yIT" } T<mP.T,$! else if(nFileLength == -2) z_Pq5 { qqu]r System.err.println("File is not access!"); LO)QEUG } zR}vR9Ls else o~VZ%B { `Z
(` for(int i=0;i<nStartPos.length;i++) p.vxrk`c { Q+E)_5_sA nStartPos = (long)(i*(nFileLength/nStartPos.length)); F[0w*i&u5 } z+nq<%"' for(int i=0;i<nEndPos.length-1;i++) SCq3Kh { 08nA}+k nEndPos = nStartPos[i+1]; b.xG' } "s\himoa nEndPos[nEndPos.length-1] = nFileLength; Lo +H&- } H*&!$s. } }wGy#!CSza VS5D)5w# U
H6
Jvt //启动子线程
NF_[q(k' fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; 2K{)8;^ for(int i=0;i<nStartPos.length;i++) !LpFK0rw { ,.uI> fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), .gw6W0\F siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), 8oP"?ew# nStartPos,nEndPos,i); x\5\KGw16 Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); %lGg}9k' fileSplitterFetch.start(); TnPx.mwK\ } 5^36nEoA( // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), F\+!\b*lP siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); a &hj| // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", stOD5yi nEndPos = " + nFileLength); :j;_Xw // fileSplitterFetch[nPos.length-1].start(); 28 ;x5m)N {
b7%Zd3- D(Q=EdlO //等待子线程结束 )AAPT7!U //int count = 0; 6W N(Tw //是否结束while循环 0C0ld!>r boolean breakWhile = false; ~*RBMHs l'"Ici#7Ls ztV%W6 while(!bStop) ^FK-e;J { ZJ|&t write_nPos(); \Jr7Hy1; Utility.sleep(500); OJ)XJL breakWhile = true; o 0H.DeP C.hRL4+;Zm JE[J}-2 for(int i=0;i<nStartPos.length;i++) X@@7Qk { (.9H1aO46| if(!fileSplitterFetch.bDownOver) jp#/]>(9Z { fZ pUnc breakWhile = false; B..> *Xb break; zR }vw{ } [vcSt5R= } uSNlI78D if(breakWhile) 8Y~\:3&1< break; ~G8haN4 *En4~;l -KiI&Q //count++; gPy}.g{tH$ //if(count>4) !F#^Peb // siteStop(); e `IL7$ } &=v5M9GR] 8>ODtKI* e1 P(-V System.err.println("文件下载结束!"); =tqChw
} V%n7h&\% catch(Exception e){e.printStackTrace ();} \Oa11c`6 } .\|}5J9W {tF)%>\# e&F=w`F\ //获得文件长度 vA0f4W 8+ public long getFileSize() Rc`zt7hbJ { EdS7m,d int nFileLength = -1; Hr;\} try{ ~{np G URL url = new URL(siteInfoBean.getSSiteURL()); $R/@%U)-o HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); WD?COUEox httpConnection.setRequestProperty("User-Agent","NetFox"); 4Pr@<S"U -y)g}D% OG2&=~hOz- int responseCode=httpConnection.getResponseCode(); wXU gxa if(responseCode>=400) F!ra$5u { @i@f@.t processErrorCode(responseCode); r_M5:Rz return -2; //-2 represent access is error hE}y/A[ } 9I*`~il>{ NpF)|Ppb{ P<IZ%eS3B String sHeader; 5t[7taLX\ ^
&VN=Y6z
uE3xzF for(int i=1;;i++) bODyJ7=[ { <|4L+?_(& //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); #^bn~ //Utility.log(in.readLine()); 2p8}6y:}7 sHeader=httpConnection.getHeaderFieldKey(i); ,M$J
yda if(sHeader!=null) 5*r5?ne { h>&t``< if(sHeader.equals("Content-Length")) %jj\w> { H.[t&VO nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); @ R;o $n break; 3+WostOx } !i?aRI/6 } ,L^ag&!4 else Y .\<P*iO break; d0N/!; } H4g1@[{|0O } 1_G5uHO catch(IOException e){e.printStackTrace ();} km9@*@) catch(Exception e){e.printStackTrace ();} <5sP%Fs ) E JJW [fr!J?/@ Utility.log(nFileLength); ny[\yj4F uKd79[1 ak]H|D" 9 return nFileLength; >Gxh=**F } %vjfAdC A7sva@}W UpCkB}OhR1 //保存下载信息(文件指针位置) *Au[{sR private void write_nPos() #=aT Sw X { K&/!3vc try{ !yf7y/qY output = new DataOutputStream(new FileOutputStream(tmpFile)); ]ag^~8bG
@ output.writeInt(nStartPos.length); F]`_ak E for(int i=0;i<nStartPos.length;i++) Gque@u { </)QCl' d // output.writeLong(nPos); wVtBH_> output.writeLong(fileSplitterFetch.nStartPos); lyQNE3 output.writeLong(fileSplitterFetch.nEndPos); 3d*wZ9qz } :N
]H"u9X output.close(); 7?"-NrW~ } 2U`g[1 catch(IOException e){e.printStackTrace ();} `NARJ9M catch(Exception e){e.printStackTrace ();} =1Tn~)^O } wb/@g=`d BZAF;j m15> ^i^W //读取保存的下载信息(文件指针位置) 2N}h<Yd9 private void read_nPos() +pJ~<ug] { q
OX=M try{ vy1N,8a DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); R#Hz%/:|A int nCount = input.readInt(); TWTh! nStartPos = new long[nCount]; P_%kYcX' nEndPos = new long[nCount]; yu@u0vlc for(int i=0;i<nStartPos.length;i++) 5{O9<~, { %Y<3v\`_ nStartPos = input.readLong(); "BD$-] nEndPos = input.readLong(); lehuJgz'OO } $BWA=2$ input.close(); fd*<m8 } ;0]s:0WD0P catch(IOException e){e.printStackTrace ();} I vD M2q8f catch(Exception e){e.printStackTrace ();} ]ppws3*Pa } ()%;s2>F &(,-:"{pNR *4RL private void processErrorCode(int nErrorCode) xzOM\Nq?O { `Fs- z System.err.println("Error Code : " + nErrorCode); ^DOQ+ } B5H=# DzE_p-
zs wBIhpiJX0 //停止文件下载 SbN.z public void siteStop() -<M'h { ck K9@RQ bStop = true; W``
-/ for(int i=0;i<nStartPos.length;i++) /D
~UK"} fileSplitterFetch.splitterStop(); } {<L< `*HM5 1U (`FY{]Wz! } - {| } UA}N //负责部分文件的抓取 |t&gyj **FileSplitterFetch.java _/)HAw?k */
_V_GdQ package NetFox; Jw)-6WJ!uO }@Ou]o <CY<-H import java.io.*; V}+Ui]ie|I import java.net.*; #JW~ &; (GXFPEH8 mM)d`br public class FileSplitterFetch extends Thread { K1[(%<Gp !S5_+.U# R\,qL-Br String sURL; //File URL 6T ,'Oz long nStartPos; //File Snippet Start Position d2[R{eNX= long nEndPos; //File Snippet End Position V{yk int nThreadID; //Thread's ID Tl`HFZQ1 boolean bDownOver = false; //Downing is over f4r)g2Zb[ boolean bStop = false; //Stop identical 6`U]%qx_I FileAccessI fileAccessI = null; //File Access interface -Gmg&yQ9 {'1e? muKCCWy# public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException `/L D:R { TwLQ;Q this.sURL = sURL; 7bC)Co#: this.nStartPos = nStart; U#
7K^(E9 this.nEndPos = nEnd; XD$;K$_7 nThreadID = id; ?N(opggiD fileAccessI = new FileAccessI(sName,nStartPos);//定位 ;J&9l
> } <A@qN95m Ul%D}(, '(!U5j public void run() ;iTZzmB { 19 <Lgr while(nStartPos < nEndPos && !bStop) +N:=|u.g { LGPPyKNx LQ3J$N ^muPjM+D try{ ^P}c0}^ URL url = new URL(sURL); NG?- dkD HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection ();
D/] httpConnection.setRequestProperty("User-Agent","NetFox"); W@FRKDixG String sProperty = "bytes="+nStartPos+"-"; ~Op~~
m httpConnection.setRequestProperty("RANGE",sProperty); |]'0z0> Utility.log(sProperty); C}8 3t~Q Yi+$g &n-)Alx InputStream input = httpConnection.getInputStream(); e<1)KqG //logResponseHead(httpConnection);
uhO-0H 35PIfqm #AUV&pI[ byte[] b = new byte[1024]; CwQRHi int nRead; S^*ME*DDz while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) 3KN>t)A# { g]Fm%iy nStartPos += fileAccessI.write(b,0,nRead); ERZWK //if(nThreadID == 1) d<+@cf_9 // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); /j:fc?yv } wC~LZSTt $KMxq= 6h3TU,$r Utility.log("Thread " + nThreadID + " is over!"); 2(iv+<t bDownOver = true; u RPvo}!=1 //nPos = fileAccessI.write (b,0,nRead); %% A==_b } a<d$P*I(cH catch(Exception e){e.printStackTrace ();} u[~= a5:4 } jpRC6b? } do&0m[x% _5&LV2 P[<EFjE //打印回应的头信息 >nOzz0, public void logResponseHead(HttpURLConnection con) +!Lz]@9K { iDrQ4> for(int i=1;;i++) unN=yeut { F vae lB String header=con.getHeaderFieldKey(i); x!QA* M if(header!=null) Xl\yOMfp //responseHeaders.put(header,httpConnection.getHeaderField(header)); 6
~d\+aV Utility.log(header+" : "+con.getHeaderField(header)); H!vX# else 0V5 {:mzA break; S1D;Xv@ } 'e5,%"5(c } Fb&WwGY,P m?_@.O@] A
^U`c'$ public void splitterStop() 1G62Qu$O { F`U
YgN bStop = true; #xTu { } q;#:nf" Z&Ao;=Gp1 A!.* eIV| } xA {1XS} )!jX$bK <Z^qBM /* ztHEXM. **FileAccess.java ~zD*=h2C *//文件访问(定位,写) 7R5!(g
package NetFox; (043G[H'. import java.io.*; F,>-+~L= tDwj~{a~ aT`. e public class FileAccessI implements Serializable{ 2#g4R to"[r //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 a-Ef$(i_ RandomAccessFile oSavedFile; z }f;_NX long nPos; CY
i{WV(: bf&k:.v'8 c`x[C public FileAccessI() throws IOException /!HFi> { 4,P!D3SH this("",0); qk=0ovUzg } ;|H(_J=6k Hg%8Q@ y_A?}'X public FileAccessI(String sName,long nPos) throws IOException
Jk3V]u { !-Br? oSavedFile = new RandomAccessFile(sName,"rw"); j~VHU89 this.nPos = nPos; `.F+T)G oSavedFile.seek(nPos); PML+$ } j+7ok 5J# ?)V}_%fVv yNkE> public synchronized int write(byte[] b,int nStart,int nLen) kFsq23Ne { U**v'%{s int n = -1; B@@j- try{ Th(F^W9 oSavedFile.write(b,nStart,nLen); Eh*t;J=O n = nLen; Yvbk[Rb } <;.->73E catch(IOException e) PZsq9;P$ { I7/X6^/} e.printStackTrace (); /'g"Ys?3 } y.m;4(( EU@XLm6 .7Lv return n; vspub^;5\ } iJD_qhd7 Q($aN- ?B`Yq\L) } *2tG07kI Gaxa~?ek ZUxlk+o9d /* !ii'hwFm$ **SiteInfoBean.java oHI/tS4
_ */ </B5^} package NetFox; Jb4A!g5C UZq1qn@+ *)H&n>"e public class SiteInfoBean { Vn1hr;i] Wr+1G 8 d[Lr`=L; private String sSiteURL; //Site's URL ,)JSXo private String sFilePath; //Saved File's Path 2r~&+0sBP private String sFileName; //Saved File's Name =-GHs$u%f private int nSplitter; //Count of Splited Downloading File *zR `*hrU{b baVSQtda public SiteInfoBean() J)xc mK {//nSplitter的缺省值为5 U&<Nhh //default value of nSplitter is 5 61^5QHur this("","","",5); ZD'fEqM } 6}EC)j;Fw >HH49cCo 1S26Y|L) public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) SWGD(]}uz { %:
.{?FB_ sSiteURL= sURL; Oor&1 sFilePath = sPath; umo@JWr sFileName = sName; fsDwfwil* this.nSplitter = nSpiltter; >IzUn: 0F ugI9rxT]Kv Xu8_ <% } h&4f9HhS= -n `igC fQB>0RR2 public String getSSiteURL() g@jAIy] { L9=D,C~
return sSiteURL; /\_wDi+# } xE4iey@\} *4tJ|m6"Y6 CNiUHUD public void setSSiteURL(String value) xXktMlI { D/&^Y'|T sSiteURL = value; iS"( }
01nbR+e "7k
82dw -OS&(7 public String getSFilePath() u0(PWCi2 { d* 6 lJT return sFilePath; Pkbx/\ } oe:@7stG @!:~gQ l`vb public void setSFilePath(String value) ByK!r~>Z1Q { Hi 1@ sFilePath = value; E\(dyq/ } _IOt(Zb( <6s?M1J BWct0= public String getSFileName() E .kjYIH8 { uWYI p\NN return sFileName; xjOj1Hv } MxY~(TVPK -U?Udmov Eo$7W5hJ public void setSFileName(String value) %Hk9.1hn5 { x}W,B,q sFileName = value; %\
i 7 } ZgcJxWC< lKd+,< \P;%fN public int getNSplitter() $`Z-,AJc { hwaU;> F return nSplitter; $EB&]t+ } Dg$Z5`%k8 .
_5g<aw; )@xHL]!5m public void setNSplitter(int nCount) &;%z1b>F { o
26R] nSplitter = nCount; <#s=78
g.3 } L*Mt/ } +h}>UK\ +ou
]| P9)E1]Dc$ /* zoV4Gl **Utility.java P,x'1`k~ */ TX96
^EoH package NetFox; G`B e~NU ;/
iBP2 [4NJ]r M% public class Utility { fWx
%?J CfguL@tR. :esHtkyML public Utility() SO#NWa<0| { i+$G=Z#3E BitP?6KX B&~#.<23: } 4L RrrW vps</f! //线程睡眠 v2e*mNK5 public static void sleep(int nSecond) =l_B58wrx { )uvs%hK try{ @_Ko<fKSX Thread.sleep(nSecond); "lcNjyU\O } ZqhCGHy catch(Exception e) #,0PLU3% { *OOi e.printStackTrace (); +/tNd2 } @)A) cBv# } 42a.@JbLQ j@xerY //日志 ]Q Y:t:- public static void log(String sMsg) IJxBPwh { nyyKA_#:5 System.err.println(sMsg); ~C1lbn b } i`3h\ku `ZCeuOH UQ;ymTqdc public static void log(int sMsg) ,m| :U { zo,`Vibx< System.err.println(sMsg); WoVPp*zlX } ,f@$a3}'Lx } "HCJ! cFcn61x- nRYHp7` /* v71j1Q}6 **TestMethod.java "P)f,n */ &vf9Gp+MK package NetFox; !_Z\K$Ns l<5@a
( `0.< public class TestMethod { Y}<w)b1e| ,(H`E?m1w4 J*Dt\[X public TestMethod() c418TjO; { ///xx/weblogic60b2_win.exe _l`d+
\# try{
UF3g]>* SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); ~=$0=)c //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); YP*EDb?f SiteFileFetch fileFetch = new SiteFileFetch(bean); j_::#?o!/ fileFetch.start(); _4eSDO[h } !c}?u_Z/ catch(Exception e){e.printStackTrace ();} ldd|"[Ds ]ZV.@%+ v6Vie o= } J!O{.v a$0,T_wD Gwyjie 9t public static void main(String[] args) [D!-~]5 { KIyhvY~ new TestMethod(); Gk<M@d^hQ } h^yLmRL } ;VhilWaF- 点击下载更多相关资料
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