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/* sB^ejH **SiteFileFetch.java OjqT5<U */ EQ|Wke package NetFox; L.}sN. import java.io.*; "*(a2k3J import java.net.*; ^=PY6! iW BglbQ'6p {y%@1q%" public class SiteFileFetch extends Thread { .3cD.']% % I2JS gFfKK`)}D' SiteInfoBean siteInfoBean = null; //文件信息Bean .WuSW[g long[] nStartPos; //开始位置 v-Q>I5D;: long[] nEndPos; //结束位置 $+Z2q<UT FileSplitterFetch[] fileSplitterFetch; //子线程对象 (NJ.\m long nFileLength; //文件长度 wwJ s_f\ boolean bFirst = true; //是否第一次取文件 j#Lj<jX!xR boolean bStop = false; //停止标志 #CB Kt, File tmpFile; //文件下载的临时信息 jc#gn&4C DataOutputStream output; //输出到文件的输出流 9RkNRB)8 wx!2/I> //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) 9-24c public SiteFileFetch(SiteInfoBean bean) throws IOException lIO#)> { 5j9%W18 siteInfoBean = bean; lLglF4 //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); m@0> =s~. tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); t=s.w(3t if(tmpFile.exists ()) ziM@@$.F { S;%k?O7v bFirst = false; `9P`f4x read_nPos(); /g!Xe]Ss }
:m/qR74+" else eIN0T;1T { ,Z! I ^ nStartPos = new long[bean.getNSplitter()]; C',uY7}< nEndPos = new long[bean.getNSplitter()]; pr,1pqiAf } h|lH`m^ kXlI*h >Ad`_g6Wew ,Ik~E&Ku2' } r)Ml-r= P.1Z@HC 6VJS
l%X public void run() 40dwp*/! { D>Rlm,U //获得文件长度 U%;E: | //分割文件 {/>uc,8O //实例FileSplitterFetch >*n4j: //启动FileSplitterFetch线程 0W+RVp=TL1 //等待子线程返回 [8oX[oP try{ wL6G&6]</W if(bFirst) S?OCy4dk: { Z/4bxO=m nFileLength = getFileSize(); %5@>
nC?`[ if(nFileLength == -1) :1@jl2, { ];N/KHeZ System.err.println("File Length is not known!"); PpF`0w=1%l } LZE9]Gd else if(nFileLength == -2) jJ,y+o { U:[CcN/~3 System.err.println("File is not access!"); 9JJ6$cLF } fRkx ^u
P else 6k<3,`VV| { x;LO{S4Z for(int i=0;i<nStartPos.length;i++) :
Cli8# { Wc;N;K52 nStartPos = (long)(i*(nFileLength/nStartPos.length)); UDnCHGq } H6`zzH0" for(int i=0;i<nEndPos.length-1;i++) eW}-UeT { sN5Mm8~ nEndPos = nStartPos[i+1]; lZ <D,& } pigu]mj nEndPos[nEndPos.length-1] = nFileLength; SxcE@WM } wub7w# } Be<bBKQb `49!di[ 3Ljj|5.q //启动子线程 Lc "{ePFh fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; ZU2D.Kf_: for(int i=0;i<nStartPos.length;i++) wnQi5P+ { >enP~uW[# fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), ,_=LV siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), ?`6Mfpvj96 nStartPos,nEndPos,i); &>K|F >7q Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); IMpL+W. fileSplitterFetch.start(); ~SsfkM" } |t;Ktl // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), T|
R!Aw. siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); nB5^ // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", g9d/nRX& nEndPos = " + nFileLength); D}-HWJQA3 // fileSplitterFetch[nPos.length-1].start(); P*hYh5a !FB2\hiM 1 CV? //等待子线程结束 :R$v7{1 //int count = 0; XIl#0-E0X //是否结束while循环 'A1y~x#2B boolean breakWhile = false; N4{g[[ T -Y N(j\ !vHCftKel while(!bStop) jW[EjhsH { &?}h)U#: write_nPos(); r|/9'{! Utility.sleep(500); Q
trU_c2k breakWhile = true; XjxI@VXzUV vVsaGW f}?pY"yvO for(int i=0;i<nStartPos.length;i++) ^1aY,6I: { t_(S e if(!fileSplitterFetch.bDownOver) :r{W)(mm { _eH@G(W( breakWhile = false; gb[.Ww break;
;CV' } RtDTcaW/ } g|4>S<uC if(breakWhile) pF}E`U=Z break; N~S#(.}[ 5p3:8G7 hl DU.k //count++; $d&7q5[ //if(count>4) Vgy12dE // siteStop(); 7~QAprwVS } HPo><u /^WawH6)6 c]ga)A( System.err.println("文件下载结束!"); ww'B!Ml>F } ,I,Zl.5 catch(Exception e){e.printStackTrace ();} [g+WL\1 } G,(Xz"`, i"E_nN"V cwQ*P$n //获得文件长度 Kf$6D 79# public long getFileSize() \fYPz }wt { X[?E{[@Z int nFileLength = -1; [:A">eYI try{ 2%`8 URL url = new URL(siteInfoBean.getSSiteURL()); {WeRFiQ?- HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); jX t5.9 t httpConnection.setRequestProperty("User-Agent","NetFox"); \oP ?b(DDQMf M,Lq4 bz int responseCode=httpConnection.getResponseCode(); +hH7|:JQ if(responseCode>=400) &@PAv5iNf { A!$sOp processErrorCode(responseCode); j1ap,<\.k return -2; //-2 represent access is error 90wnwz } =~dsIG ER4#5gd 7EL0!:P p3 String sHeader; X'2%'z< @Qqf4h CwO$EL:[` for(int i=1;;i++) )>;387'Y { CKU)wJ5t //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); S@4bpnhK //Utility.log(in.readLine()); Nvd(Tad sHeader=httpConnection.getHeaderFieldKey(i); .Lm`v0'w if(sHeader!=null) c-Qa0Q { }j\8|UG if(sHeader.equals("Content-Length")) V9`jq$ { !__^M3S,k nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); mxwG~a'_ break; sq8O+AWl } h{?f
uoZj% } 4k6: else H;FzWcm break; P1`YbLER5 } QX.U:p5C } 8yuTT^ catch(IOException e){e.printStackTrace ();} Imo?)dYK catch(Exception e){e.printStackTrace ();} XhOg> mt-t8~A =]<X6!0mR Utility.log(nFileLength); u:^9ZQ+ W:2]d O@LUM{\ return nFileLength; RF\h69]:I } s-l3_210 C"h7'+Kw [-#q'S //保存下载信息(文件指针位置) n+Ng7 private void write_nPos() OoZv\"}!_ { u$ ^r(.EV try{ :QMpp}G output = new DataOutputStream(new FileOutputStream(tmpFile)); 9*CRMkPrd output.writeInt(nStartPos.length); %V-Hy ;V for(int i=0;i<nStartPos.length;i++) C{V,=Fo^ { ;9uDV-" // output.writeLong(nPos); }7qboUG e output.writeLong(fileSplitterFetch.nStartPos); \F7NuG:m, output.writeLong(fileSplitterFetch.nEndPos); W:2j.K9! } 1.a:iweN output.close(); tA
K=W$r } :,'.b|Tl.b catch(IOException e){e.printStackTrace ();} :&s8G* catch(Exception e){e.printStackTrace ();} ]TsmW ob } `O?j -zR W{kTM4 c>#3{}X|x% //读取保存的下载信息(文件指针位置) 1EliR uJ private void read_nPos() y*I,i*iv { <?!%dV{z try{ z,SNJIsx DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); IXR%IggJA int nCount = input.readInt(); jZqCM{ nStartPos = new long[nCount]; \YH*x` nEndPos = new long[nCount]; }y%mG&KSz for(int i=0;i<nStartPos.length;i++) XBTjb { P0-K/_g nStartPos = input.readLong(); \Iz-<:gA' nEndPos = input.readLong(); t
y%Hrw } ,k,+UisG input.close(); LlbE]_Z!U% } VS5D)5w# catch(IOException e){e.printStackTrace ();} Pm|S>r catch(Exception e){e.printStackTrace ();}
NF_[q(k' } 2K{)8;^ tSunO-\y :U'Oc3l#Y private void processErrorCode(int nErrorCode) c+UZ UgP { ~fz9PoC System.err.println("Error Code : " + nErrorCode); I -V=Z: } z*/}rk4i sfCU"O2G ^<Sy{KY //停止文件下载 t\-;n:p- public void siteStop() sTECNY=l { EB5^eNdL bStop = true; (gUxS.zU for(int i=0;i<nStartPos.length;i++) oX6()FR fileSplitterFetch.splitterStop(); <A]
Kg L^jhr>-"; (w/lZt } XC[bEp$ } F2$?[1^f //负责部分文件的抓取 y~rtYI
**FileSplitterFetch.java G 2FD'Sf */ >]?!9@#IH package NetFox; ?"T *{8 dijHi bO+L#Kf import java.io.*; R|!4klb import java.net.*; N-Sjd%Z (.9H1aO46| jp#/]>(9Z public class FileSplitterFetch extends Thread { 3x
E^EXV NMhI0Ix$w ob7hNo# String sURL; //File URL /SJI ~f+$ long nStartPos; //File Snippet Start Position qk!,:T long nEndPos; //File Snippet End Position S~.%G)R int nThreadID; //Thread's ID :ZU-Vi.b boolean bDownOver = false; //Downing is over 7iH%1f boolean bStop = false; //Stop identical gnZc`)z FileAccessI fileAccessI = null; //File Access interface $Q56~AP %Yny/O\e% lAPPng` public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException =b#,OXQ { s^-o_K\*c this.sURL = sURL; o1rH@ D6/- this.nStartPos = nStart; :74G5U8% this.nEndPos = nEnd; ~> 5 nThreadID = id; AF"XsEt.e fileAccessI = new FileAccessI(sName,nStartPos);//定位 R nk&:c } qUG)+~g` QQX7p!~E {3\{aZ8) public void run() XM?C7/^k { ag"Nf-o/Y while(nStartPos < nEndPos && !bStop) $WZHkV { Z`{GjV3%wH Xa&0j&AH 604^~6 try{ 78FK{Cr URL url = new URL(sURL); Cg%}= HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); n,%/cUl httpConnection.setRequestProperty("User-Agent","NetFox"); jg=}l1M" String sProperty = "bytes="+nStartPos+"-"; wXU gxa httpConnection.setRequestProperty("RANGE",sProperty); LKu
,H Utility.log(sProperty); @i@f@.t r_M5:Rz 3>buZ6vh InputStream input = httpConnection.getInputStream(); 4>te>[ //logResponseHead(httpConnection); j79$/ Ol
C:
a</Sl e2MjV8Bs byte[] b = new byte[1024]; k3r<']S^ int nRead; Eilo;-El while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) qJEtB;J' { ~DUOL~E nStartPos += fileAccessI.write(b,0,nRead); ~X1<x4P\ //if(nThreadID == 1) ^97\TmzP{ // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); r[ RO"Ej" } U7d05y' lX%e iLJBiZ+ Utility.log("Thread " + nThreadID + " is over!"); Ox"SQ`nSj' bDownOver = true; %1%@L7wP> //nPos = fileAccessI.write (b,0,nRead); r*W&SU9Z } &W-1W99auE catch(Exception e){e.printStackTrace ();} ]gB:ht } q%8Ck)xz } \Gz
79VW 9c=`Q5 6yXMre)YV //打印回应的头信息 Mg=R**s1x% public void logResponseHead(HttpURLConnection con) 8Z(\iZ5Rgj { ~`o%Y"p%rv for(int i=1;;i++) uZ(,7>0 { t-$Hti7Lk String header=con.getHeaderFieldKey(i); lhduK4u if(header!=null) qre(3,VE5 //responseHeaders.put(header,httpConnection.getHeaderField(header)); IyGW>g6_. Utility.log(header+" : "+con.getHeaderField(header)); _&/2-3]\B else 6eAJ>9@x break; =FXq=x%9+ } t{Gc,S!]5 } yo"!C?82= XFWo"%}w mA0|W#NB public void splitterStop() Gque@u { </)QCl' d bStop = true; @y{
f>nm } wxo{gBq ueV,p?Wo 3\&I7o3V } g2W ZW#a) 7?"-NrW~ F)hUT@ /* 2U`g[1 **FileAccess.java `NARJ9M *//文件访问(定位,写) =1Tn~)^O package NetFox; wb/@g=`d import java.io.*; eAbp5}B }tUr
V uy
oEMT#u public class FileAccessI implements Serializable{ DjQgF=; RS
/*Dp^ //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 =!P$[pN2 RandomAccessFile oSavedFile; @1iH4RE* long nPos; \6K1Z!*; @RFJe$% u13v@<HGc public FileAccessI() throws IOException _$BH.I { Ej/P:nB this("",0); *K2fp=Ns } 8Xk,Nbcqt qBXIR} yc3i> w` public FileAccessI(String sName,long nPos) throws IOException 8VR!
Y0`e { hR%2[lBn!] oSavedFile = new RandomAccessFile(sName,"rw"); 3[}w#n1 this.nPos = nPos; V.Qy4u7m oSavedFile.seek(nPos); #FsoK*F } ,ku3;58O< A!fRpN TrmrA$5f public synchronized int write(byte[] b,int nStart,int nLen) WTQd}f { <<[\
Rv int n = -1; -JfO} DRI try{ A6%~+9 oSavedFile.write(b,nStart,nLen); XZ[3v9?&n n = nLen; MFO1v%m } !DNk!]| catch(IOException e) LXx`Vk>ky { SH#!Y e.printStackTrace (); ]8ob`F`m, } #i0f}& QsH?qI&2jp eCXw8 return n; :}p<Hq 8Z } 8I,/ysT: NGOyd1$7N j`ybz G^ } tboc7Hor4 =y WHm 1i:Q
%E
F /* n`2LGc[rP **SiteInfoBean.java `]4bH,%~ */ T +~
_D package NetFox; AN
'L-
E L(w?.)E =>,X)+O public class SiteInfoBean { px=r~8M9} %6HJM| {H k9 NPC" private String sSiteURL; //Site's URL g RBbL1 private String sFilePath; //Saved File's Path Tl`HFZQ1 private String sFileName; //Saved File's Name f4r)g2Zb[ private int nSplitter; //Count of Splited Downloading File h^=9R6im [V _\SQV0 +DA,|~k_ public SiteInfoBean() sRDxa5<MD {//nSplitter的缺省值为5 rhA>;9\ //default value of nSplitter is 5 "%]vSr this("","","",5); Q 2nqA1sRk } X6k-a; +EE(d/f W+ D{4: public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) RLr^6+v)U { ?-D'xqc sSiteURL= sURL; Spt;m0W90 sFilePath = sPath; +W[NgUrGJ sFileName = sName; mr\C
this.nSplitter = nSpiltter; [3fmhc wA?q/cw C N/i {j.= } o`<ps$yT z<,rE yjj)+eJ(Q public String getSSiteURL() $|pD}
{ )G=hgqy return sSiteURL; w-?|6I}T } "6zf-++% ry!0~ir zaMKwv}BR public void setSSiteURL(String value) o%.0@W { YH/3N(], sSiteURL = value; y(h"0A1lW } yy#4DYht APM!xX=N )2mvW1M=7; public String getSFilePath() xI(Y}> { Yo;Mexo! return sFilePath; _8'z"wF } _W^{,*p 0;avWa)Q wwVg'V; public void setSFilePath(String value) >[a&,gS { !R@s+5P)U sFilePath = value; 2JX@#vQ4 } D~LU3#n VSW"/{Lp Zz@wbhMV public String getSFileName() bFtzwa5Gc { J'#R9NO< return sFileName; vD'YLn%Q } qF57T>v| )9'Zb`n PWbi`qF)r public void setSFileName(String value) N,~"8YSo { %"g; K sFileName = value; 3?:?dy(3z } z((9vi W
)h,-zAnZ
j^qI~|# public int getNSplitter() 3}25=%;[ { n+%tu"e return nSplitter; +#MQ8d } fZF.eRP' Kb,#Ot G0&'B6I> public void setNSplitter(int nCount) Zq\Vq:MX { &=`6- J nSplitter = nCount; z)0%gd| } $mLiEsJ } I^itlQ BOf)27) $ Ov#^wfA /* Z&j?@k,k **Utility.java |VE*_ G */ ^dCSk== package NetFox; TATH,Sz:x FErKr) 3E]IEf public class Utility { V^ 5Z9! w;(B4^? kV:C=MLI public Utility() f+W8Gszi { ruTj#tWSo C8bv%9 W9%B9~\G;+ } '1te(+;e@ n,.t~ //线程睡眠 k%fy public static void sleep(int nSecond) ^#)M,.G^ { EaXDY< try{ ug.'OR Thread.sleep(nSecond); os~}5QJ } k:k!4 catch(Exception e) Kt/Wd { ^":Dk5gl e.printStackTrace (); +KKx\m* } 95X!{\ } k=8L hO ;$>wuc'L //日志 ;_<K>r* public static void log(String sMsg) gP 6`q { c0M>CaKD System.err.println(sMsg); J0a#QvX! } z(d X< Zk#?.z} >HlQ+bl$xw public static void log(int sMsg) v'W`\MKY) { o YNp0Hc System.err.println(sMsg); $dgez#TPL } .?CumaU } lM'yj}:~ RFzMah?Q=j HG)c\b /* 1ps_zn( **TestMethod.java x.-d>8-!]c */ V|mz]H#| package NetFox; \NI0rL 8`S6BkfC| PS${B
public class TestMethod { p&4#9I5 @mu2,% 1[Ffl^\ARp public TestMethod() {P>%l\? { ///xx/weblogic60b2_win.exe XOi[[G} try{ m"RE[dQ SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); >iIUS //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); ":upo/xN SiteFileFetch fileFetch = new SiteFileFetch(bean); Wy.Xx-3W fileFetch.start();
T24?1 } J4;Fk catch(Exception e){e.printStackTrace ();} ?=X_a{}/ maopr$r &$
/}HND } NDaM;` Ap[}[:U baVSQtda public static void main(String[] args) CWk65tcF { b+`mh new TestMethod(); >4lT0~V/ } _Z|3qQ } rJ UXA<:2 点击下载更多相关资料
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