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/* LUz`P6 **SiteFileFetch.java 1hV&/Qr */ I/v#!`L package NetFox; >SYOtzg% import java.io.*; 5"q{b1 import java.net.*;
>Yv#t.! R_Bf JD. FgPmQ public class SiteFileFetch extends Thread { ^BI&-bR@ Yx ;j Ml+f3#HP SiteInfoBean siteInfoBean = null; //文件信息Bean 09G]t1!, long[] nStartPos; //开始位置 K+yi_n L long[] nEndPos; //结束位置 f)Z'#[A*t7 FileSplitterFetch[] fileSplitterFetch; //子线程对象 T).}~i;! long nFileLength; //文件长度 (.{. " boolean bFirst = true; //是否第一次取文件 "[Tr"nI boolean bStop = false; //停止标志 =Q|s[F File tmpFile; //文件下载的临时信息 A?)(^ DataOutputStream output; //输出到文件的输出流 Tm~jYgJ +yHzp //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) R9+f^o`W public SiteFileFetch(SiteInfoBean bean) throws IOException PM {L}tEQ { *y>| siteInfoBean = bean; y92<(ziaX) //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); ;hFB]/.v tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); jar?"o if(tmpFile.exists ()) W`n_m&Y\ { [FWB bFirst = false; ZQ[s: read_nPos(); -OfAl~ 4 } %u]>K(tU else SC2g5i` { 0XL[4[LdA nStartPos = new long[bean.getNSplitter()]; uuCVI2| nEndPos = new long[bean.getNSplitter()]; v\kd78, } kaCn@$ %g4)f9> 7G_lGV_ ^^)\|kW? } <R#:K7>O ZPY84)A_} N=:xyv public void run() bW'Y8ok[v { 9x9E+DG#( //获得文件长度 `"bp-/ //分割文件 %,) Xi //实例FileSplitterFetch Gv\fF;,R //启动FileSplitterFetch线程 jH4Wu`r;m //等待子线程返回 aII:Pzh]B try{ UAdj[m61 if(bFirst) Q9t.*+ { j !`2Z@ nFileLength = getFileSize(); KhbbGdmfS$ if(nFileLength == -1) u\UI6/ { k${F7I(Tb System.err.println("File Length is not known!"); G@S'_ } ^EKf_w-v else if(nFileLength == -2) g|4v>5Y { :SpPT System.err.println("File is not access!"); B&H
[z } Qp>Q-+e0 else )i>T\B { VnMiZAHR for(int i=0;i<nStartPos.length;i++) gH/k}M7tA# { Ga^k1TQq nStartPos = (long)(i*(nFileLength/nStartPos.length)); gJBk&SDgtP } v#+tu,)V; for(int i=0;i<nEndPos.length-1;i++) .'N#qs_ { rkWW)h(e nEndPos = nStartPos[i+1]; oI%.oP}G } <i1P ~ nEndPos[nEndPos.length-1] = nFileLength; .DHRPel } S8Yh>j8- } @BXV>U2B{ h%@#jvh?4 [p_C?hHO //启动子线程
6@ )bZ| fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; 6T~xjAuJ3T for(int i=0;i<nStartPos.length;i++) u8@>ThPD {
/=7[Q fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), ZCVN+::Y siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), cb~m==G nStartPos,nEndPos,i); 5bKn6O)K Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); mCx6$jz fileSplitterFetch.start(); -n~VMLd?@ } U=bZy,FT$ // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), b}r3x&) siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); [t`QV2um // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", I*K~GXWs# nEndPos = " + nFileLength); %@FTg$ // fileSplitterFetch[nPos.length-1].start(); JEes'H}Y D}Lx9cL XX(;,[(_ //等待子线程结束 0qV!-i //int count = 0; AHR[i%3W //是否结束while循环 Ie?C<(8Ul boolean breakWhile = false; izi=`;=D^ W7"ks( Io&F0~Z;;( while(!bStop) X;0DQnAI8j { NUH# write_nPos(); ~dK)U*Q Utility.sleep(500); K(HP PM\ breakWhile = true; O(PG"c y85/qg)H^ ;[@<
, for(int i=0;i<nStartPos.length;i++) y8un&LP { Ij }RlYQz if(!fileSplitterFetch.bDownOver) nV%1/e"5 { BUcze\+ breakWhile = false; ~V"D|U;i + break; {@oYMO~ } |L4K# } rr#&0`] if(breakWhile) }4kd=]Nk break; \5Jpr'mY5 |,Y(YSg. }cG!93 //count++; g Xvuv^ //if(count>4) t3b%f`D // siteStop(); oToUpkAI } g#1_`gK Cv|ya$}a ,\f!e#d System.err.println("文件下载结束!"); YzSUJ=0/ } { CkxUec catch(Exception e){e.printStackTrace ();} 0zaE?dA] } @U(D&_H,K QOkPliX w Maib3Q //获得文件长度 &V[m{. public long getFileSize() RUmJ=i'4/ {
WLEjRx int nFileLength = -1; s3W )hU) try{ Mjrl KI}f/ URL url = new URL(siteInfoBean.getSSiteURL()); 9Bl_t}0 HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); rm NqS+t httpConnection.setRequestProperty("User-Agent","NetFox"); &CFHH"OsT <DCrYt!1}c t7("geN] int responseCode=httpConnection.getResponseCode(); /z*?:* if(responseCode>=400) BM#cosV7%h { b:Dr_| processErrorCode(responseCode); XS]=sfN return -2; //-2 represent access is error
Q uy5H } rE-Xv.
| qIa|sV\w0 6)kF!/J String sHeader; EaG3:<>J 4,T!zT6& q3B#rje>h for(int i=1;;i++) _* ] ~MQ= { ._"U{
f2V //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); +s
c|PB //Utility.log(in.readLine()); q-3%.<LL sHeader=httpConnection.getHeaderFieldKey(i); -4o6 OkK< if(sHeader!=null) !dYkvoQNn { BDyOX6 if(sHeader.equals("Content-Length")) Sve~-aG { Z+@" nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); ]QM6d(zDA break; `9Zoq=/ } n|Vs2 7 } *[(O&L&0 else PmO utYV break; 1g5%Gr/0$5 } ScYw3i } 9~bje^M catch(IOException e){e.printStackTrace ();} &!vJ3: catch(Exception e){e.printStackTrace ();} ~sshhuF }kdYR#{s 0:R} Utility.log(nFileLength); =xWZJ:UnU hV])\t=yf hWwh`Vw% return nFileLength; }9
N, +* } 11}X2j~Ww [
/w{,+U }x`W+r //保存下载信息(文件指针位置) 2Otd private void write_nPos() i)g=Lew { 8i=J(5= try{ \B8tGog output = new DataOutputStream(new FileOutputStream(tmpFile)); %*lOzC output.writeInt(nStartPos.length); T>e!DOW; for(int i=0;i<nStartPos.length;i++) gEbe6!; q3 { '+N!3r{G // output.writeLong(nPos); 6uW?xB9 output.writeLong(fileSplitterFetch.nStartPos); \dTX%<5D output.writeLong(fileSplitterFetch.nEndPos); &WE| 9 } +',[q output.close(); CTQF+Oe8O } {v+,U} catch(IOException e){e.printStackTrace ();} $As;Tvw. catch(Exception e){e.printStackTrace ();} P7 O$* } Nl,M9 ^EWkJW,Yc T_|%nF-+ //读取保存的下载信息(文件指针位置) >Lx,<sE private void read_nPos() 2W:R{dHE { J^8(h R try{ z %{Z DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); '=K
[3%U int nCount = input.readInt(); {m~.'DU nStartPos = new long[nCount]; O*xC}$OOn nEndPos = new long[nCount]; 16ahU$@- for(int i=0;i<nStartPos.length;i++) h3D~?Iom { mIgc)" nStartPos = input.readLong(); GOuBNaU{ nEndPos = input.readLong(); 6&_"dg" } 9W88_rE'e} input.close(); 4$.$j=Ct." } 'NHtCs=F catch(IOException e){e.printStackTrace ();} g"aWt%
P catch(Exception e){e.printStackTrace ();} nf=*KS\v } 6t/nM .'N:]G@! GSo&$T;B6 private void processErrorCode(int nErrorCode) S`g:zb_ { !=%0 System.err.println("Error Code : " + nErrorCode); )@+lfIE(l } )a"rj5~- Otq`4 5 D#Qfa!=g //停止文件下载 vU,AOK[l{ public void siteStop() :j_OO5b! { !lQGoXQ'4 bStop = true; W <.h@Rz+ for(int i=0;i<nStartPos.length;i++) i4;`dCT|A fileSplitterFetch.splitterStop(); gwVfiXR4 xuBXOr4"P 4Ufx,] } /){F0Zjjt } +/
s2;G //负责部分文件的抓取 EC9D.afy& **FileSplitterFetch.java s}"5uDfn1F */ s&(,_34 package NetFox; d'j8P ,K4*0!TXP !;Hi9,<#7g import java.io.*; x~1.;dBF import java.net.*; r*$$82s HqM>K*XKU CbPCj.MH public class FileSplitterFetch extends Thread { _<Hx1l~ F:$Dz?F0v (EZ34,k'S String sURL; //File URL j5hM|\] long nStartPos; //File Snippet Start Position 5vxKkk&i4l long nEndPos; //File Snippet End Position iMgfF_r int nThreadID; //Thread's ID OPm?kr boolean bDownOver = false; //Downing is over 6AS'MD%& boolean bStop = false; //Stop identical >R|*FYam FileAccessI fileAccessI = null; //File Access interface ?Q$LIoR gkxEy5c[ >y
P`8Oq[ public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException #$\cRLPg { kk`BwRh)d; this.sURL = sURL; #Bo/1G= this.nStartPos = nStart; L|sWSrqd this.nEndPos = nEnd; -
0t
nThreadID = id; 5Gj?'Wov9 fileAccessI = new FileAccessI(sName,nStartPos);//定位 ,p(4OZz5, } WW.\5kBl8 !8 3x,*O i?7%z` public void run() &p?Oo^ { W@S'mxk#* while(nStartPos < nEndPos && !bStop) qF9rY)ifm { @G/':N Bjg 21bw^ &&1q@m,cP try{ 6{O#!o*g URL url = new URL(sURL); >.R6\>N% HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); Bx(+uNQ httpConnection.setRequestProperty("User-Agent","NetFox"); Kd_WN;l String sProperty = "bytes="+nStartPos+"-"; o]NL_SM_ httpConnection.setRequestProperty("RANGE",sProperty); V/j]UK0$ Utility.log(sProperty); -25#Vh +uPN+CgQ@ qZ!1>`B InputStream input = httpConnection.getInputStream(); h6*=Fn7C //logResponseHead(httpConnection); -t9oL3J v}6YbY Tq B3I\= byte[] b = new byte[1024]; qa ![oMKc int nRead; =goZI6 7 while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) MDkIaz\U { :oB4\/(G# nStartPos += fileAccessI.write(b,0,nRead); .?SClTqg //if(nThreadID == 1) ;WIL?[;w // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); c ;3bX6RD* } O$
i6r]j_ >J=x";,D|~ Q, E!Ew3 Utility.log("Thread " + nThreadID + " is over!"); da@y*TO#i bDownOver = true; /,v:!* //nPos = fileAccessI.write (b,0,nRead); Q6S[sTKR } ^_<>o[qE catch(Exception e){e.printStackTrace ();} Q:+Y-&||" } ^v3+w"2 } [BhpfZNKRA }\u~He% +N[dYm //打印回应的头信息 [Hdk=p public void logResponseHead(HttpURLConnection con) @{_PO{=\C { '4sT+q for(int i=1;;i++) m@JU).NKCS { |xzqYu?o String header=con.getHeaderFieldKey(i); 2h&pm if(header!=null) 5q]u: //responseHeaders.put(header,httpConnection.getHeaderField(header)); OxF\Hm)( Utility.log(header+" : "+con.getHeaderField(header)); }jd[>zk else We#*.nr{3Z break; whKr3) } z>j%-3_1 } se_zCS4Y "EpE!jh 6o;lTOes public void splitterStop() !W$3p'8Tu { uMsKF %m bStop = true; E08AZOY&g } +:&(Ag 3|:uIoR{
5, Yk5?l<' } cb%w,yXw {>FA ~}cX. 4BEVG&Ks
/* Wr)%C **FileAccess.java ZJ=C[s!wu *//文件访问(定位,写) V2/+SvB2 package NetFox; rvE!Q=y~ import java.io.*; `ss]\46> Tjs-+$P+ !W$Br\< public class FileAccessI implements Serializable{ nBiSc* q/OraPAB //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 UjKHGsDi4 RandomAccessFile oSavedFile; $E7yJ|p{ long nPos; )%j)*Ymz; qE,%$0g /@#)j(
eY/ public FileAccessI() throws IOException ;
wHuL\ { zx'`'t4~ this("",0); 3al5Vu2: } b1*6) g<.8iW 'c M3z7P.\G public FileAccessI(String sName,long nPos) throws IOException 0>e>G (4(8 { *Mp<4B oSavedFile = new RandomAccessFile(sName,"rw"); 9q8
rf\& this.nPos = nPos; Ej34^*m9k oSavedFile.seek(nPos); S'@"a%EV } -x_iqrB h,p&/oU4U b&_p"8)_ public synchronized int write(byte[] b,int nStart,int nLen) #&8Opo( { i'5bPW int n = -1; Ow^%n(Ezh try{ &0C!P=-p oSavedFile.write(b,nStart,nLen); 73<iK]*c n = nLen; \U-5&,fP } sN?:9J8
catch(IOException e) eqf~5/Z { ud#8`/!mq e.printStackTrace (); <%Rr-, } (CV=0{] v*^2[pf 9(PFd% return n; ~w*ojI } CKR9APkv dk]ro~ [ iLI]aZ } ^}[
N4 H5%I?ZXw4 iGlZFA /* )/pPY **SiteInfoBean.java ^R$dG[Qf */ ZT8j9zs package NetFox; zF$wz1
% N|)V/no 6 OlJj|?z$ public class SiteInfoBean { Dm^kuTIG P3|<K-dFAK _t[%@G>P private String sSiteURL; //Site's URL O^$Zz< private String sFilePath; //Saved File's Path dEp=;b s private String sFileName; //Saved File's Name od fu7P_ private int nSplitter; //Count of Splited Downloading File PWU#`>4 N{yZk"fq:6 6};oLnO public SiteInfoBean() 7(;VUR%%. {//nSplitter的缺省值为5 X[ (J!"+ //default value of nSplitter is 5 D-!%L<< this("","","",5); T{M:)}V } fpi6pcof Jp#cFUa t cOgtBEhn public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) !;a<E: { 5S?yj sSiteURL= sURL; mTgn}rXk sFilePath = sPath; 1hWz%c| sFileName = sName; . gJKr this.nSplitter = nSpiltter; xL"%2nf 2Qj)@&zKe#
}+J@;: } -tdG}Gu QAwj]_ y<b0z\ public String getSSiteURL() y|se^dn { }"Cn kg return sSiteURL; NZ5~\k } -EaZ<d[|0 (c2\:hvy eV0S:mit public void setSSiteURL(String value) U;@jl?jnG { bg}77Y'^ sSiteURL = value; 8|GpfW3p2 } PgAfR:Y! aO%FQ)BT E}=NZqOB! public String getSFilePath() mNel3J3
{ $O8V!R* return sFilePath; ={'($t%|T } BkfBFUDQ
qS|VUy4 9A(K_d-!H public void setSFilePath(String value) auW]rwY { !ei20@ sFilePath = value; OvG0UXRU } ""^BW Re D {B.]w9 2*YXm>|1 public String getSFileName() :<8V2 { -RQQ|:O$ return sFileName; yZ$;O0f&& } @F^L4 N': gDNW~?/ `kSCH; mwP public void setSFileName(String value) @|Bp'`j%J { zEfD{I sFileName = value; U&$]?3? } =Gz>ZWF "Cj#bUw KB*=a public int getNSplitter() {OrE1WHB { $yFuaqG`Wo return nSplitter; F$p*G][ } N|2 RpP[ymMZJ rxp9B>~ public void setNSplitter(int nCount) 7h/Q;P5 { wg_CI,Kq nSplitter = nCount; 72vGfT2HtZ } _hL4@C } TbAdTmW pY>-N *"{Z?< 3 /* @b\_696. **Utility.java .hNw1~Fj */ S{7ik,Gdg package NetFox; P\6T4s ={@ @`yP^$ Ny7=-]N4{" public class Utility { ~LW%lMy;^| ^-*Tn Mqf}Aiqk; public Utility() OrJlHMz { 8yz((?LrDh )K%O/H P^m 6di } Bp{`%86SE maEpT43f //线程睡眠 MGKeD+=5 public static void sleep(int nSecond) %<#3_}"T| { SJc@iffS try{ lrX0c$) Thread.sleep(nSecond); @&xaaqQ- } v[DbhIXU catch(Exception e) -Dq:Y,%q { }%FuL5Tx e.printStackTrace (); SLjf<.S } .C;_4jE } (yAvDyJOn ?&<o_/`-H5 //日志 5~%,u2 public static void log(String sMsg) Y{2d4VoW6 { -YjgS/g System.err.println(sMsg); j484b2uj1 } ;zE5(3x D<3V#Opw z>p`!-'ID public static void log(int sMsg) QT= ,En { ,ibPSN5Ca System.err.println(sMsg); !+DJhw&c, } 1mVVPt^6 } 5-WRv; ?7nr\g"g( =_m9so /* 8u'O`j **TestMethod.java $FusDdCv3 */ @-&(TRbZo package NetFox; o|;eMO- Am4^v?q ;y~{+{{Ow public class TestMethod { 1S(\2{Ylo H9san5{ >g>`!Sf public TestMethod() MYw8wwX0kJ { ///xx/weblogic60b2_win.exe d=Df.H+3 try{ 24jtJC,7 SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); ,s><kHJ //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); 9sU+IT K4 SiteFileFetch fileFetch = new SiteFileFetch(bean); Gkv~e?Kc~^ fileFetch.start(); f7Df %&d } 7*>S;$ catch(Exception e){e.printStackTrace ();} lTr*'fX 9XoQO 9*Q % nmY:}um } 6vgBqn[ `/w\2n &(1H!
public static void main(String[] args) K/2. 1o;9 { 3xzkZ8]/ new TestMethod(); S~k*r{?H}) } Cx+WLD } -.{oqs$ 点击下载更多相关资料
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