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/* </@5>hx/ **SiteFileFetch.java Bha("kG */ 9v;HE{> package NetFox; L N.:>, import java.io.*; 6xwjKh:9 import java.net.*; mpCu,l+lo ]7>#YKH. l6 }+,v@# public class SiteFileFetch extends Thread { f~PS'I_r 7R
m\# NZ&ZK@h}. SiteInfoBean siteInfoBean = null; //文件信息Bean ao=e{R) long[] nStartPos; //开始位置 mqHH1} long[] nEndPos; //结束位置 `LLmdm 6i FileSplitterFetch[] fileSplitterFetch; //子线程对象 /5z,G r long nFileLength; //文件长度 "
DLIx} boolean bFirst = true; //是否第一次取文件 5c(g7N boolean bStop = false; //停止标志 "C&>$h_% File tmpFile; //文件下载的临时信息 LwxJ:Kz. DataOutputStream output; //输出到文件的输出流 Mis B&Ok`k I )vR //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) o|vL:| 8Q public SiteFileFetch(SiteInfoBean bean) throws IOException K3`!0( { l4.ql1BX@y siteInfoBean = bean; =$^90Q,Z; //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); }* }F_Y+ tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); ::'Y07 if(tmpFile.exists ()) q_`j-! {
!bCL/[ bFirst = false; =nc;~u|] read_nPos(); M!mw6';k } K(lSR else OcPgw/
I { H!hd0. nStartPos = new long[bean.getNSplitter()]; BqHqS nEndPos = new long[bean.getNSplitter()]; | 4}Y:d } %4F\#" A \`["IkSg7 X>Q4 4FV! J Eo;Fx] } vnVT0)Lel MzgP@tB "S6";G^I public void run() V|B4lGS& { 64mD%URT //获得文件长度 G4P*U3&p //分割文件 \'[tfSB //实例FileSplitterFetch Ii5U)" //启动FileSplitterFetch线程
!sEhjJV^7 //等待子线程返回 dlCiqY:} try{ D29Lu(f
if(bFirst) `''y,{Fs { }uC]o@/ nFileLength = getFileSize(); 3.hFYA w if(nFileLength == -1) Ayg^<)JWh { SCe$v76p# System.err.println("File Length is not known!"); r-xP6 } lw}7kp4
2F else if(nFileLength == -2) ER~RBzp { k'N``. System.err.println("File is not access!"); S ~h*U2 } nK+ke)'Zv= else 4e
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for(int i=0;i<nStartPos.length;i++) !G[%; d { \,X)!%6kZ nStartPos = (long)(i*(nFileLength/nStartPos.length)); !9YCuHj!p } $ (xdF for(int i=0;i<nEndPos.length-1;i++) 1 n&%L8] { Sw"h!\c` nEndPos = nStartPos[i+1]; .I_<\h7 } 5p}j{f nEndPos[nEndPos.length-1] = nFileLength; _>;MQ)Km~ } $oM>?h_= } 1L'Q;?&2H, U9^1A* @R%qP>_ //启动子线程 IQtQf_"e1 fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; kh=<M{-t for(int i=0;i<nStartPos.length;i++) p4k}B. f { X=abaKl fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), ^,^MW siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), uM_ww6 nStartPos,nEndPos,i); uKXD(lzX Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); "M-';; fileSplitterFetch.start(); U*\K<fw } l4r>#n\yj // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), ];6955I! siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); Ai[@2A yU // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", K$qY^oyQFw nEndPos = " + nFileLength); Ri_2@U- // fileSplitterFetch[nPos.length-1].start(); S2Ez}*plp ,.V<rDwN& .81Y/Gad_ //等待子线程结束 tA< UkPT //int count = 0; kqj)&0|X //是否结束while循环 F:P2:s<d- boolean breakWhile = false; Fp@> (M#3 F7*)u-4Yn ^Mq@} 0 while(!bStop) o@.{|j { qWWt5rJ write_nPos(); cUG^^3! Utility.sleep(500); F@q9UlfB- breakWhile = true; 6s~B2t:Y dm=?o ercXw7{ for(int i=0;i<nStartPos.length;i++) ,<#Rk'y$ { ys`oHSf if(!fileSplitterFetch.bDownOver) BLaNS4e { n-jPb064 breakWhile = false; ,vf#e=Z break; 'm6bfS^T } zT6nC5E } C,eP!_O if(breakWhile) nr
-< mQ break; !DSm[Z1 82EvlmD D QxuV1 //count++; 1Hr1Ir<KR //if(count>4) 7rRI-wZ // siteStop(); i \/'w] } 1_f+!
ns# NNqvjM- k,=<G, System.err.println("文件下载结束!"); ]N'%l]_$ } _Y&.Nw catch(Exception e){e.printStackTrace ();} 6=$<R4B } ]jVE OOXSJE1 2P8wvNDG //获得文件长度 w5PscEc public long getFileSize() oNPvks dC; { P)f8lU^z int nFileLength = -1; Ot\[Ya'' try{ Y
?n4#J< URL url = new URL(siteInfoBean.getSSiteURL()); Q"{Dijc% HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); .(cpYKFX httpConnection.setRequestProperty("User-Agent","NetFox"); &}P#<"Fo8Q =d ;#Nu- PpG;5 int responseCode=httpConnection.getResponseCode(); |36%B7H if(responseCode>=400) d;gs1]E50 { gU|:Y&lFZg processErrorCode(responseCode); #CI0G return -2; //-2 represent access is error \rxjvV4fcZ } FA{Q6fi:2 :X'B K4EN 9^n0<(99b String sHeader; ]*k ~jY, .4"BN<9 I9+h-t for(int i=1;;i++) 80Fa i { \yw5`5g //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); \C>IVz<O //Utility.log(in.readLine()); ;K8}Yq9p9 sHeader=httpConnection.getHeaderFieldKey(i); rm3/R< if(sHeader!=null) {X?1}5ry { !<~.>5UQ if(sHeader.equals("Content-Length")) +
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nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); +8?18@obp break; _p1!8*0] } -['& aey}a }
WZ,k][~ else Un)Xe break; Yq|_6zbYf } ;-py h( }
hO.b?>3NL catch(IOException e){e.printStackTrace ();} Fy E#@ R catch(Exception e){e.printStackTrace ();} e/+.^ '{ GU/P%c/V +3zQ"lLD^ Utility.log(nFileLength); [DeDU: N]iarYc Q) aZ0 Pt return nFileLength; B%Qo6*b } EU:N9oT ] WYub1 >/4[OPB0R //保存下载信息(文件指针位置) #V/{DPz private void write_nPos() 5ta;C G { 0F- +)S?M[ try{ Uq'W<.v5 output = new DataOutputStream(new FileOutputStream(tmpFile)); S{e3aqT#N output.writeInt(nStartPos.length); 9<3}zwJ for(int i=0;i<nStartPos.length;i++) sj/k';#g { JSju4TQ4 // output.writeLong(nPos); ._]Pz6 output.writeLong(fileSplitterFetch.nStartPos); qvy*;
<w output.writeLong(fileSplitterFetch.nEndPos); RiR],Sj } x!s=Nola
output.close(); K7JZUS`C! } iVeH\a catch(IOException e){e.printStackTrace ();} P~!,"rY catch(Exception e){e.printStackTrace ();} MLTS<pW/ } gS[B;+d ;g#nGs> 7w9'xY //读取保存的下载信息(文件指针位置) tx<^PV2 private void read_nPos() !'#
D~ { @UdF6:T try{ d\3 %5Y DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); 5p~5-_JX int nCount = input.readInt(); jf;n* nStartPos = new long[nCount]; )XSHKPTQ1 nEndPos = new long[nCount]; kGnT4R*E for(int i=0;i<nStartPos.length;i++) 1CZO+MB&"$ { d42Y` Wu nStartPos = input.readLong(); \/ri|fm6l# nEndPos = input.readLong(); +\ "NPK@3 } .7Yox1, input.close(); @.k^ 8hc } 9\Ff z& catch(IOException e){e.printStackTrace ();} V73/q catch(Exception e){e.printStackTrace ();} PeiRe } *mj=kJ7(
5-fASN.Lx ipGxi[Vav private void processErrorCode(int nErrorCode) (?(gz#- { ZZHQ?p- System.err.println("Error Code : " + nErrorCode); v\G7V } `q^qe> ' R%2.N!8v 7uw-1F5x7 //停止文件下载 [ t8]'RI% public void siteStop() vmNI$KZM { b5%<},ySq bStop = true; l0t(t*[Mj for(int i=0;i<nStartPos.length;i++) l*wGKg"x3 fileSplitterFetch.splitterStop(); I<<1mEk *K?UWi#$ L;?h)8 } E+<GsN] } M/[_~ //负责部分文件的抓取 ~AaEa,LQ **FileSplitterFetch.java ?ZC!E0] */ Ug0c0z!b package NetFox; ,{(XT7hr V,& OO e#}Fm;|d import java.io.*; Qp:m=f6@ import java.net.*; / s Apj rrgOp5aV" ^%Y-~yB- public class FileSplitterFetch extends Thread { ps` j>vX* t&x\@p9 3jW&S String sURL; //File URL G"(aoy,
co long nStartPos; //File Snippet Start Position W<^t2 j' long nEndPos; //File Snippet End Position *6u2c%^ int nThreadID; //Thread's ID YE*|KL^ boolean bDownOver = false; //Downing is over K7{B!kX4k boolean bStop = false; //Stop identical pQ^V<6z} FileAccessI fileAccessI = null; //File Access interface ct,;V/Dx F}[!OYyg i-wWbZ- public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException x_-V{
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H this.sURL = sURL; mb3aUFxA; this.nStartPos = nStart; 2PeMt^ this.nEndPos = nEnd; tG9C(D`G nThreadID = id; &F7_0iAP( fileAccessI = new FileAccessI(sName,nStartPos);//定位 BL>~~ } d+]= l+& 0cfGI% @U?&1.\ public void run() s%vy^x29 { qW4\t while(nStartPos < nEndPos && !bStop) "D4% A!i { (s|WmSQ x7gd6"10^ (w"(RM~ try{ %}~(%@qB>+ URL url = new URL(sURL); |9FrVO$M HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); ?A .ah httpConnection.setRequestProperty("User-Agent","NetFox"); %c]N- String sProperty = "bytes="+nStartPos+"-"; Dz2Z
(EXI~ httpConnection.setRequestProperty("RANGE",sProperty); }Cfl|t<5f Utility.log(sProperty); |-*50j l S{MB$JA U%BtBPL InputStream input = httpConnection.getInputStream(); E|RC|Sz=u //logResponseHead(httpConnection); ?0sTx6x@ GCr]x ' ld|GY>rH byte[] b = new byte[1024]; 6'uCwAQU int nRead; X$Q.A^9 while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) b-<@3N.9] { 726UO#* nStartPos += fileAccessI.write(b,0,nRead); Tz9 (</y //if(nThreadID == 1) hc0 $mit // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); #E\6:UnT } %8Y+Df;ax 5{DwD{Q 69:-c@L0 Utility.log("Thread " + nThreadID + " is over!"); o F_{oV' bDownOver = true; Y1ca=ewFx //nPos = fileAccessI.write (b,0,nRead); jxhZOLG } x11r iK catch(Exception e){e.printStackTrace ();} j5/|1N } `0_
Y| 4KB } G[_Z|Xi1 OfA+|xT& x\:KfYr4Y; //打印回应的头信息 br k*; public void logResponseHead(HttpURLConnection con) +`mI\+y, { <rui\/4NJ for(int i=1;;i++) :w|=o9J { G^VOA4 String header=con.getHeaderFieldKey(i); bF,.6iKI if(header!=null) F9las#\J //responseHeaders.put(header,httpConnection.getHeaderField(header)); 8gt*`]I Utility.log(header+" : "+con.getHeaderField(header)); Bzt:9hr6BO else qJonzFp7 break; {+{p. } }F9#3W&`c } Q9f5} $txF|Fj]^A uz$p'Q public void splitterStop() {wz_ngQ { EDnZ/)6Gg bStop = true; p__N6a } F)imeu {
JDD"z H;tE= } \K%M.>]vq AkO);4A;Jd :Zob"*T /* [Ne'2z **FileAccess.java ]Z=al`- *//文件访问(定位,写) X$P(8'[9A package NetFox; suLC7x`Z import java.io.*; FQ47j)p; ?0JNaf [^/a`Kda8 public class FileAccessI implements Serializable{ 2_M+o]Z^ }o[<1+W(. //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 q j9q RandomAccessFile oSavedFile; {t|#>UCK long nPos; &^ s8V]^ >mEfd=p @8A[HP public FileAccessI() throws IOException }'>mT,ytgk { *W,[k&;: this("",0); Hmx.BBz } TVSCjI a+~b3 k:@N6K/$P^ public FileAccessI(String sName,long nPos) throws IOException alNn(0MG { %Kp^wf#o9 oSavedFile = new RandomAccessFile(sName,"rw"); :kwDa
a this.nPos = nPos; E
GZiWBr oSavedFile.seek(nPos); 1:@ScHS } $T7 qd
Nvh&=%{g >w.%KVBJ public synchronized int write(byte[] b,int nStart,int nLen) Z6Kp-z(l3 { @B(E&
int n = -1; zh\"sxL try{ 9v3n4=gc oSavedFile.write(b,nStart,nLen); t6\--lk_ n = nLen; #mK?:O\-1 } Gui[/iY,F catch(IOException e) uf (_<~ { hJk:&!M=T e.printStackTrace (); q0vZR"y } X*5N&AJ UVgSO|Tg \l
8_aj return n; `Gl[e4U } ?gvu
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g /* e5 zi "~ **SiteInfoBean.java ) vVf- zU */ WQD:~*C: package NetFox; 'Yc^9;C( hH%fWB2( +qT+iHa|n public class SiteInfoBean { m@w469&<(q RQ^
\|+_ W@'*G*f private String sSiteURL; //Site's URL b^ [ z' private String sFilePath; //Saved File's Path mh SknyqT private String sFileName; //Saved File's Name 1~LfR private int nSplitter; //Count of Splited Downloading File hk
S:_e= UTN[!0[
.P?n<n# public SiteInfoBean() 2Yd@V} {//nSplitter的缺省值为5 [cl+AV " //default value of nSplitter is 5 2cRru]VZ5 this("","","",5); IXm[c@5l } $%
gz ,{ . n)R@&9 ue'dI public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) I'p+9H$ { }4h0{H sSiteURL= sURL; :2C
<;o sFilePath = sPath; >Q[ Z{ sFileName = sName; SB .=x this.nSplitter = nSpiltter; }Ya! [tX 0)
F\aJ4Y Y"yrc0'&T } IA]wO%c 3Lq9pdM>2@ ux|
QGT2LY public String getSSiteURL() G#6Z@|kVw { KT >Y^ return sSiteURL; ?d{O'&|: } #5'@at'1 hdSP#Y'- qfxEo76' public void setSSiteURL(String value) L%QRWhB { &?Q^i">cZ sSiteURL = value; 6 v~nEw } zDbO~.d aIrM-c8.O b0f6p>~q^ public String getSFilePath() C8|# { :eJJL,v return sFilePath; [/VpvQ' } X-,oL.:c @7.7+blS"H ~kSOYvK$' public void setSFilePath(String value) t*A[v { UX<-jY#'V sFilePath = value; NJ-Ji> w } J2!
Q09 }5 iXL^[/}&?M U?5lqq public String getSFileName() dga4|7-MY { BGwD{6`U return sFileName; l"DHG`kb } ,R3TFVV!? m.! M#x2! Di4GaKa/ public void setSFileName(String value) >w,jaQ { M+HhTW;I= sFileName = value; =l${p*ABQ } yG7H>LF?8 ^~7Mv^A :l1-s] public int getNSplitter() g0}jE%) { {x_cgsn return nSplitter; ',t*:GBZCf } ZZTf/s* ]FIIs58IM ~K<h~TNP public void setNSplitter(int nCount) ,r]H+vWS { -38"S;M8 nSplitter = nCount; o^*: } pL`Q+}c} } -;&I S ZX1/6|_ "Y&
/* /~f[># **Utility.java lBs-u h */ ABkDOG2br package NetFox; RjPkH$u'Pj F'|e:h r `n|fD. public class Utility { {#4a}:3 H>;,r, G
kG#+C0L public Utility() [6JDS;MIN { 7
@}`1>97 q9j~|GE| Dykh|" } D M+MBK
I9>vm] //线程睡眠 &0%Zb~ts public static void sleep(int nSecond) F --b,, { SG|AJ9 try{ \ERxr
Thread.sleep(nSecond); F8{gJaP x } ]sL.+.P catch(Exception e) Y;huTZ { t!6uz e.printStackTrace (); a=A12< } pI8z.JD } ]Sa#g&}T> 8]`s&d@GY //日志 GIc q|Pe public static void log(String sMsg) zuW4gJ { HR8YPU5
System.err.println(sMsg); X';qcn_^ } V6HZvuXV! ,Ww}xmq1H <PuY"-`/Oc public static void log(int sMsg) Q<;EQb# { Zy;jp*Q System.err.println(sMsg); F+Qnf'at1 } e7{6<[k3+$ } 3C%|src |9]-_a qK#"uU8B /* zF[Xem **TestMethod.java )xa)$u */ $hcv}<$/ package NetFox; @<pd@Mpf] R8u8jG(4
aY(s
& public class TestMethod { ]?D$n SM
RKEPwp& )D6i {I0 public TestMethod() V*Fy@ { ///xx/weblogic60b2_win.exe 5YNAb/!!F try{ "N=$=Dy> SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); ]wEI*c( //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); C=q&S6/+ SiteFileFetch fileFetch = new SiteFileFetch(bean); h'=)dFw7 fileFetch.start(); { >izfG,\ } g_P98_2f.k catch(Exception e){e.printStackTrace ();} y'odn ; mhhc}dS(H 8~-TN1H } |^UQVNJ )^s>2 1 ;7?oJH; public static void main(String[] args) H,w8+vZ4\ { z[QDJMt> new TestMethod(); &ZC{ _t } 1R~$m } 6O6B8 点击下载更多相关资料
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