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/* P8By~f32_ **SiteFileFetch.java EG`AkWy */ lkTA"8d package NetFox; iv +a5 import java.io.*; bH/4f93Nb import java.net.*; 77[TqRLf ;k `51=Wi !;*flr`/ public class SiteFileFetch extends Thread { b_F1?:# )2Sh oFF iTAj${ > SiteInfoBean siteInfoBean = null; //文件信息Bean Ly8=SIZ long[] nStartPos; //开始位置 bHRn}K+<}c long[] nEndPos; //结束位置 0~RD@>] FileSplitterFetch[] fileSplitterFetch; //子线程对象 "%D"h long nFileLength; //文件长度 mwLf)xt0' boolean bFirst = true; //是否第一次取文件 PbZ%[F boolean bStop = false; //停止标志 2?q>yL! Gz File tmpFile; //文件下载的临时信息 gdTW
~b
DataOutputStream output; //输出到文件的输出流 ]R)wBug 8=L"rekV_ //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) {v]L|e%{ public SiteFileFetch(SiteInfoBean bean) throws IOException a5t&{ajJ { 8j70X <R siteInfoBean = bean; o"BED!/ //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); NO[A00m|OL tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); +&VY6(Zj+* if(tmpFile.exists ()) rD <T { H%Vf$1/TF bFirst = false; vA_,TS#Bo read_nPos(); mm+V*L{x } KMy"DVqE else ynM~&]fk#k { &t<gK
D nStartPos = new long[bean.getNSplitter()]; ^uUA41o`eJ nEndPos = new long[bean.getNSplitter()]; }W:Z>vam+ } 8,IF%Z+LI 5|~g2Zz{; qqZ4K:oC, tT)s,R% } -~8PI2 tkk8b6%h?p o"X..m< public void run() pp(09y`] { =Mwuhk|* //获得文件长度 q:)PfP+ //分割文件 G) KI{D //实例FileSplitterFetch hmkb!) //启动FileSplitterFetch线程 ZKEoU! //等待子线程返回 2! ,ndLA try{ H ;=^
W if(bFirst) #6|ve?`I { E3j`e>Yz nFileLength = getFileSize(); ?sdSi-- if(nFileLength == -1) %!A:Ka!m. { t27UlFX System.err.println("File Length is not known!"); 2c[HA } :tO4LEb else if(nFileLength == -2) zuN(~>YH { \\:%++}J System.err.println("File is not access!"); | 8mWR=9fs } akr2Os else G?Gf,{#K { +8Q @R)3 for(int i=0;i<nStartPos.length;i++) CtN\-E- { wg)Bx#>\L: nStartPos = (long)(i*(nFileLength/nStartPos.length)); B/a`5&G] } Xykoq"dbb for(int i=0;i<nEndPos.length-1;i++) ^"|q~2 { #KoI8U" nEndPos = nStartPos[i+1]; |g}r } *GXPN0^Qjo nEndPos[nEndPos.length-1] = nFileLength; HN367j2 e } Ln&~t(7 } Z+U -+eG ',`Qx{tQ) aE)1LP //启动子线程 `)8~/G% fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; _GxC|d for(int i=0;i<nStartPos.length;i++) f9#srIx+ { {'+{ASpO! fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), ,^e2ma|z siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), >2>/
q? nStartPos,nEndPos,i); HN`qMGW^ Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); <& PU%^Ha fileSplitterFetch.start(); sS{Co8EJn } ^wZx=kas // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(),
tM\BO0 siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); =PA?6Bm // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", t|oIzjKE/ nEndPos = " + nFileLength); hzqgsmT) // fileSplitterFetch[nPos.length-1].start(); m,kYE9{ p+?`ru ;Ngk"5 //等待子线程结束 30WOH
'n //int count = 0; "aKlvK:77 //是否结束while循环 .u
ikte boolean breakWhile = false; Y5C kC F \8ZVI98 A/a=)su while(!bStop) CB>W# P% { (|AZO! write_nPos(); X(E`cH
| Utility.sleep(500); #]1jvB breakWhile = true; |)>+&
xk %pxJ2 7Q rlh:|#GTJ for(int i=0;i<nStartPos.length;i++) y-H9fWi8Y& { EZiLXQd_ if(!fileSplitterFetch.bDownOver) P-T@'}lW { +`"Tn`O breakWhile = false; |) ~-Wy break; >G!=lLyR } HP*{1Q@5 } *A48shfO if(breakWhile) o<lmU8xB= break; +UOVD:G 4Dzg r,V P4yUm(@ //count++; {ly <%Q7j //if(count>4) *%jtcno=Y // siteStop(); 9xJtDdy-O } ]Kjt@F"; J?#vL\8 7wW x 8 System.err.println("文件下载结束!"); 5V(#nz } dKEy6C"@ catch(Exception e){e.printStackTrace ();} w2b(,w } (5Q<xJ RgH 6l2 v9@_DlV\ //获得文件长度 Lbrn8,G\ public long getFileSize() (FGy"o%TP' { H1?C:R int nFileLength = -1; #'f5owk>, try{ ddl]!
^IK URL url = new URL(siteInfoBean.getSSiteURL()); $A 5O> HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); Kp7)my httpConnection.setRequestProperty("User-Agent","NetFox"); X4\T=Q?uLx Or$"f3gq ?1r;6 int responseCode=httpConnection.getResponseCode(); QPp31o.!5 if(responseCode>=400) ~eP~c"L { JP"#9f processErrorCode(responseCode); Xsanc@w)^C return -2; //-2 represent access is error HhCFAq"j } KY<
$+/B! $$p +~X jdVj
FCl^# String sHeader; 1Z_w2D* QhTn9S:D {G3Ok++hc for(int i=1;;i++) 5ad@}7& { _-{=Z=?6} //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); 1+3-Z>^ e //Utility.log(in.readLine()); 3TjyKB *! sHeader=httpConnection.getHeaderFieldKey(i); dzbbFvG if(sHeader!=null) :8bq0iqsV { \>"Zn7 if(sHeader.equals("Content-Length")) 7~1Fy{tc {
Rq2bj_ j nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); h*<`ct xL break; .#tA .%
} !a V:T&6 } N@Ap|`Ei else T:%0i8p break; Z?[R;V1j } KMfIp:~ } 4Hyp]07 catch(IOException e){e.printStackTrace ();} )D+eWo catch(Exception e){e.printStackTrace ();} =s:kC`O m7A3i<6p \N|}V.r Utility.log(nFileLength); hB>FJZQ_ e 5(|9*t )~$ejS return nFileLength; @HI@PZ> } ! B` |Om][z hqHk,# //保存下载信息(文件指针位置) K0'p*[yO/j private void write_nPos() @$p6w { Y*lc ~X try{ "IJ1b~j? output = new DataOutputStream(new FileOutputStream(tmpFile)); )2d1@]6# output.writeInt(nStartPos.length); %2'4h(Oq^ for(int i=0;i<nStartPos.length;i++) nip*Y@- F { <ldArZ4C4 // output.writeLong(nPos); "\~>[on output.writeLong(fileSplitterFetch.nStartPos); M`=\ijUwN output.writeLong(fileSplitterFetch.nEndPos); Fm&f } '>bn94$ output.close(); F|VHr@% } i 28TH
Jh catch(IOException e){e.printStackTrace ();} K",Xe> catch(Exception e){e.printStackTrace ();} v'`qn } %,S:^Rvv (IHR {m F!I9)PSj //读取保存的下载信息(文件指针位置) (?T{^Hg private void read_nPos() 3-;<G { SFP?ND+7 try{ .
Z9c.E{ DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); $i3`cX)g int nCount = input.readInt(); bFA
lC nStartPos = new long[nCount]; y~t
e!C nEndPos = new long[nCount]; "f3mi[ for(int i=0;i<nStartPos.length;i++) f@Ve,i { h{~GzrL* nStartPos = input.readLong(); NN:zQ_RT nEndPos = input.readLong(); 2=7[r-*E } :c}PW"0v input.close(); h6`VU`pPI } \Yv44*I` catch(IOException e){e.printStackTrace ();} mH<|.7~0 catch(Exception e){e.printStackTrace ();} Yu[MNX;G } *ZRk) 6khm@}} W8]?dL}| private void processErrorCode(int nErrorCode) Qe9}%k6@E { F5UHkv"K&O System.err.println("Error Code : " + nErrorCode); [
f<g?w } 4w 7vgB .",BLuce b?M. 0{"H //停止文件下载
6|6O|
<o public void siteStop() $`C$|9S { cI7a TLC"s bStop = true; }LWrtmc for(int i=0;i<nStartPos.length;i++) :.-KM7tDI1 fileSplitterFetch.splitterStop(); L&5zr_ m+pK,D~{" 5ry[Lgg } Z\1`(Pq7` } 0!axAvBV //负责部分文件的抓取 mxc^IRj **FileSplitterFetch.java Z0V6cikW6 */ 54s90 package NetFox; 0(uba3z sG|,#XQ gV5mERKs import java.io.*; rb>2l3g* import java.net.*; &MONg=s3 p .~5k `Y '-2Fv public class FileSplitterFetch extends Thread { %3K'[2F ?IO3w{fmH >;xkiO>Y String sURL; //File URL !0X"^VB long nStartPos; //File Snippet Start Position K_X(j$2Xc long nEndPos; //File Snippet End Position h9. Yux int nThreadID; //Thread's ID Sn;q:e3i{A boolean bDownOver = false; //Downing is over nu16L$] boolean bStop = false; //Stop identical BMU#pK;P] FileAccessI fileAccessI = null; //File Access interface pqbKPpG 4]cr1K
^ D_w<igu!3 public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException `V[ hE
r| { q^[SN this.sURL = sURL; 0|rdI,z this.nStartPos = nStart; IPY[x| this.nEndPos = nEnd; q6
4bP4K nThreadID = id; bh5C fileAccessI = new FileAccessI(sName,nStartPos);//定位 y<yU5 } AX{yfL Ojp|/yd^YL iA"H*0 public void run() #vcQ =%;O { SR/
"{\C while(nStartPos < nEndPos && !bStop) s*>B"#En { DK%@[D bde6
;=oM Y$ZDJNz try{ m?1AgsBR URL url = new URL(sURL); uKT\\1Jrq HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); {~=gKZ:-@ httpConnection.setRequestProperty("User-Agent","NetFox"); D rouEm String sProperty = "bytes="+nStartPos+"-"; yyjgPbLN= httpConnection.setRequestProperty("RANGE",sProperty); 61z^(F$@ Utility.log(sProperty); Wb{8WPS **n109R Q>/[*(.Wd InputStream input = httpConnection.getInputStream(); %BkPkQA //logResponseHead(httpConnection); C9`x"$ s:sk`~2<gd ).r04)/ byte[] b = new byte[1024]; g$Nsu:L int nRead; pA5X<)~
while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) YtT:\#D { B o[aiT nStartPos += fileAccessI.write(b,0,nRead); G4f%=Z //if(nThreadID == 1) `]l[p+DO // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); {/qq*0wa } 9q<?xO pH.&OW% I}/-zyx>= Utility.log("Thread " + nThreadID + " is over!"); Z&y9m@ bDownOver = true; /}-LaiS //nPos = fileAccessI.write (b,0,nRead); &?SU3@3| } O#b%&s"o catch(Exception e){e.printStackTrace ();} [PU0!W; } 'A#l$pJp7 } #_fL[j& ,09d"7`X
=Wl}Pgo! //打印回应的头信息 fh}j)*K8 public void logResponseHead(HttpURLConnection con) |uln<nM9 { H:L<gv(rG for(int i=1;;i++) =q*j". < { v6KF0mqA& String header=con.getHeaderFieldKey(i); 4ko(bW#jL if(header!=null) =a./HCF //responseHeaders.put(header,httpConnection.getHeaderField(header)); 7Dx<Sr! Utility.log(header+" : "+con.getHeaderField(header)); E`UEl$($ else nOUF<DNQ break; !\1Pu| } O<qo%fP } 6y)NH 8l7 GMoE,L @EB2I+[ public void splitterStop() C?VNkBJ>\ { d}]jw4 bStop = true; K<ok1g'0 } >[gNQJ6 Q|:qs\6q5 [e`6gGO } THDyb9_g dht*1i3v g%f6D%d)A /* <>6 DPHg~ **FileAccess.java 6J%yo[A(w *//文件访问(定位,写) $#F7C[2N package NetFox; 7
a_99?J import java.io.*; \TXCq@ #R3|nL y j C@ public class FileAccessI implements Serializable{ f^k H[C dn@_\5 //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 Lkl^
` RandomAccessFile oSavedFile; Mi&jl_& long nPos; TbA=bkj[4 \ POQeZ X=i",5; public FileAccessI() throws IOException |4|j5<5 { /%w3(e this("",0); c0u1L@tj } "AUHe6Yv .=<<b| $fl+l5?9 public FileAccessI(String sName,long nPos) throws IOException a EmLf { ,fW%Qv oSavedFile = new RandomAccessFile(sName,"rw"); C{8(ew this.nPos = nPos; z1 P=P%F oSavedFile.seek(nPos); rRzc"W}K+ } OtFGo8 &i?>mt zsuXN * public synchronized int write(byte[] b,int nStart,int nLen) $z5 { r;cILS|Xr int n = -1; }IGoPCV| try{ j$Z:S~* oSavedFile.write(b,nStart,nLen); YPNG9^Y n = nLen; IG=# 2 /$ } :J6lJ8w
? catch(IOException e) $c<NEt_\ { U[t/40W}P e.printStackTrace (); xb~8uD5 } @j|=M7B
c
1o8 6@;
P return n; #:LI,t }
d|
OEZx %d"d<pvx C6{\^kG^j2 } 5>u,Qh NANgV~Y& k~=_]sLn /* *'jI>^o **SiteInfoBean.java 5VR=D\j */ qz6@'1 package NetFox; DA wUG dcbE<W#ss {YigB public class SiteInfoBean { pa8R;A70Dl hX9vtV5L H^r;,Q$9 private String sSiteURL; //Site's URL JOFQyhY0>m private String sFilePath; //Saved File's Path g?i0WS private String sFileName; //Saved File's Name "9bd;Tt: private int nSplitter; //Count of Splited Downloading File vkE a[7 ]<Kkq! "';K$&,[ public SiteInfoBean() *~SanL\ {//nSplitter的缺省值为5 Q.Xs%{B //default value of nSplitter is 5 LZH~VkK@m} this("","","",5); {q1u[T&r } fobnK~2 @Tz}y"VG [H5BIM@{ public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) $~5ax8u&!# { Dlqvz|X/ sSiteURL= sURL; "cD MFu sFilePath = sPath; 5e}adHjM sFileName = sName; q)PLc{NO this.nSplitter = nSpiltter; Bx9v2x. d.Ep#4 GLWEoV9< } $@^*lUw v1}9i3Or# B3g#) public String getSSiteURL() <e'/z3TbRW { L-eO_tTh0 return sSiteURL; <@H`5[R } _2
oZhJ s&7TARd DrA\-G_7 public void setSSiteURL(String value) (j?ckah%V { v@ifB I sSiteURL = value; JpE7"Z"~MS } T7R,6qt n4InZ!) p!>DA?vF public String getSFilePath() /^hc8X { Aa4 DJ return sFilePath; r&3EM[*Iw } %fMFcL#h R1vuf*A5, *%CDQx0} public void setSFilePath(String value) &t:~e" 5< { <N{Y*,^z sFilePath = value; }?^]-`b } d}Xb8SaE%c lsA?|4`mn %sCG}?
y public String getSFileName() sWv!ig_ { keb.%cb= return sFileName; = P$Q;d } W$xW9u8@+( F4PWL|1 t Z@OAPRx public void setSFileName(String value) +vt?3i\^. { :hTmt{LjN sFileName = value; 2@,rIve } EslHml# N"8'=wB Y^tUcBm\ public int getNSplitter() ;a 6Z=LB { [*U.bRs return nSplitter; =z zmz7op } `Z^\<{z [JYy
P&IS$FC.\ public void setNSplitter(int nCount) IoZ_zz0 { bF'Jm*f nSplitter = nCount; DT3"uJTt } ~,7Tj } %>!W+rO, x%W% X`28? /* Yk0/f|>O **Utility.java +CN!3(r */ ~9Qd83`UH package NetFox; M>d^.n 6TDa#k5v _B0C]u3D public class Utility { 'x6rU"e $J GT,1t=|&V '| p"HbJ public Utility() L~Y^O`c { jo'
V.]\ o .*t t:"%d9]
} P'^& SK MM6PaD{ //线程睡眠 -"rANP-UI public static void sleep(int nSecond) ^hcK& { '^`iF,rg try{ wZVLpF+7 Thread.sleep(nSecond); XT?wCb41R }
Clb7=@f catch(Exception e) Nq1YFI>W { ,P%i%YPj e.printStackTrace (); t;`ULp~& } /ke[nr } Z7> Nd$E{ m48Ab` //日志 6O_l;A[=1 public static void log(String sMsg) "B>8on8O { CEAmb[h System.err.println(sMsg); aNBwb9X } qu&p)*M5 $]rC-K:Z 45k.U $<| public static void log(int sMsg) <}T7;knO { Yv.7-DHNl System.err.println(sMsg); g7{:F\S } dQ_hlx!J } EQ.K+d*K][ P *&Cght>0 my0iE: /* 9N<=,!;5~s **TestMethod.java 4'TssRot@h */ Lp(i&A package NetFox; I4KE@H"%7 aW}d=y[ @_wJN Qo` public class TestMethod { P9
HKev?y nG4ZOx.*1g IH=$
wc public TestMethod() XcT!4xG0 { ///xx/weblogic60b2_win.exe (/$-2.@ try{ pnSKIn SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); _D}3`` //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); Ojz'p5d`> SiteFileFetch fileFetch = new SiteFileFetch(bean); T1$p%yQH fileFetch.start(); (" :Dz_ } `Gv\"|Gn catch(Exception e){e.printStackTrace ();} rK'Lvt@w b||usv[or kCD]& } #&)H&H} pW.WJ`Rk octQ[QXo# public static void main(String[] args) qvu1 u
GCc { v)*MgfS new TestMethod(); =&08s(A } 4>oM5Yf8 } TaSS) n 点击下载更多相关资料
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