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/* ht)*Ync **SiteFileFetch.java D.CsnfJ */
Dmv package NetFox; $cpQ7 import java.io.*; kkBV;v%a import java.net.*; ?UhAjtYIS W
me1w\0 >,]e[/p public class SiteFileFetch extends Thread { h+u|MdOY\ ez:o9)N4 IV#My9}e SiteInfoBean siteInfoBean = null; //文件信息Bean j%y+W{Q[ long[] nStartPos; //开始位置 l
)V43 long[] nEndPos; //结束位置 vc{]c
} FileSplitterFetch[] fileSplitterFetch; //子线程对象 f I-"8f0_ long nFileLength; //文件长度 l'lDzB+.* boolean bFirst = true; //是否第一次取文件 #_L& boolean bStop = false; //停止标志 #cF8)GC File tmpFile; //文件下载的临时信息 .lj! ~_ DataOutputStream output; //输出到文件的输出流 G]DN!7]@g *>*/| //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) ./*,Thc public SiteFileFetch(SiteInfoBean bean) throws IOException
>Pd23TsN { T:~W.3
siteInfoBean = bean;
(mD:[|. //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); PL_wa(}y]D tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); eKti+n. if(tmpFile.exists ()) 2DqHqq9m { SK}g(X7IWH bFirst = false;
%c2i.E/G read_nPos(); "/-v 9 } x[@3;_'K else ef;="N { c Yn}we}7 nStartPos = new long[bean.getNSplitter()]; N6
(w<b nEndPos = new long[bean.getNSplitter()]; Z5a@fWU } 1% %Tm" 'R5l
=Wf nln[V$ HZ4
^T7G } _7HJ' OiEaVPSI; )g^Ewzy^X public void run() ly5L-=Xb { M@[gT?mv1 //获得文件长度 $
rnr;V //分割文件 q8v!{Os+# //实例FileSplitterFetch ?o'arxCxZn //启动FileSplitterFetch线程 VOOThdR //等待子线程返回 yVv3S[J try{ !)3Su=*R if(bFirst) ):EXh # { PH &ms nFileLength = getFileSize(); $^ dk>Hj>4 if(nFileLength == -1) JN-8\L { ' *C)S System.err.println("File Length is not known!"); (\Zo"x;( } 0DT2qM[, else if(nFileLength == -2) Px&Mi:4tG { boB{Y 7gO4 System.err.println("File is not access!"); *0ntx$M-w } ;| ,Y2?
else 3H%WB| { LB+=?Mz V for(int i=0;i<nStartPos.length;i++) %b4(wn?n:B { I;Y`rGj nStartPos = (long)(i*(nFileLength/nStartPos.length)); EPnB%'l\c } 8gm[Q[
for(int i=0;i<nEndPos.length-1;i++) 6{WT;W>WT: { *heQ@ww nEndPos = nStartPos[i+1]; D];([:+4 } cSDCNc*% nEndPos[nEndPos.length-1] = nFileLength; Z}S tA0F_ } ,OAWGFKOp } d>psqmQ _Hj,;Z Oip..f0 //启动子线程 %=eD)p7l- fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; hKeh9 Bt for(int i=0;i<nStartPos.length;i++) <u/({SZ& { Md{f,,E'^@ fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), tJ=zk3BN~ siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), %,RU)} nStartPos,nEndPos,i); eA^|B zU Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); @eU/g![u fileSplitterFetch.start(); UbH=W(% } $ayD55W4 // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), P*sCrGO% siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); Sd11ZC6 // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", e 3oIoj4o nEndPos = " + nFileLength); VH65=9z // fileSplitterFetch[nPos.length-1].start(); KphEw[4/ El}z^e _%!hkc( //等待子线程结束 F\<i>LWT' //int count = 0; Sp:de,9@ //是否结束while循环 .?:~s8kB boolean breakWhile = false; _zwuK1e M/;g|J
jM .1}(Bywm5 while(!bStop) ?!Gt.
fb { 7|Y8^T
s write_nPos(); t/(j8w Utility.sleep(500); )}5rs breakWhile = true; b7mP~]V &T}e93] -&tiM
v for(int i=0;i<nStartPos.length;i++) =p$ Wo { 1t'\! if(!fileSplitterFetch.bDownOver) Ne_>%P|I_ { ')<$AMy1 breakWhile = false; x|5/#H break; 5Px_vtqP } OD|&qsbL } yRDLg
c if(breakWhile) VvKH]>* break; `#U6`[[ +__Rk1CVh S0yT%V //count++; na)ceN2h //if(count>4) T94$}- 5/) // siteStop(); d0az#Yg! }
)G&OX "'(4l 2. LJx
g System.err.println("文件下载结束!"); ]f?LQCTq<b } 0g\&3EvD catch(Exception e){e.printStackTrace ();} 9
|Y?#oZ1 } Mt>DAk Fjb[Ev d-aF- //获得文件长度 mH"`46 public long getFileSize() Q<qIlNE { @hPbD?)M int nFileLength = -1; <Jz>e}*) try{
XMdYted URL url = new URL(siteInfoBean.getSSiteURL()); 6D<A@DR9J HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); !$HWUxM;p httpConnection.setRequestProperty("User-Agent","NetFox"); jL<.?HE ]gZjV D![Twlll int responseCode=httpConnection.getResponseCode(); :nt%z0_ if(responseCode>=400) ~MX@-Ff { ^y,ip=<5\3 processErrorCode(responseCode); 3ssio-X return -2; //-2 represent access is error p"Y= } T}* '9TB hV)I
C9 MRc^lYj{
String sHeader; *RO ~%g [A47OR CgWj9 [ for(int i=1;;i++) Pcc%VQN { &~8}y+z //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); Z[VKB3Pb8 //Utility.log(in.readLine()); g@L4G?hLn sHeader=httpConnection.getHeaderFieldKey(i); (Lp-3Xx if(sHeader!=null) K^ lVng { Ge x^\gf if(sHeader.equals("Content-Length")) %oo&M; { {T9g\F* nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); kMA>)\ break; tznT*EQr } jWz-7BO } 1N&U{#4 else U&NOf;h$ break; nJnan,`W } FYJB.lAT } '"EOLr\Z, catch(IOException e){e.printStackTrace ();} *HRRv.iQ catch(Exception e){e.printStackTrace ();} t9}XO M* f
W ) ?#'qY6 ^ Utility.log(nFileLength); j.K yPWO ,\M'jV"SK ?g&]*zc^\ return nFileLength; \ gN) GR } |w5#a_adM VF-d^AGt h$!qb'| //保存下载信息(文件指针位置) 2-~oNJqX private void write_nPos() fjb2-K { ]8#{rQ( try{ 5^k#fl2 output = new DataOutputStream(new FileOutputStream(tmpFile)); 9fiZ5\ output.writeInt(nStartPos.length); U6Qeode for(int i=0;i<nStartPos.length;i++) =cQwR:): { ATU@5,9 // output.writeLong(nPos); 1\2 m'o output.writeLong(fileSplitterFetch.nStartPos); [qz6_WOo output.writeLong(fileSplitterFetch.nEndPos); aj\'qRrU$ } #[8gH>7 output.close(); R8E<;^?j } L%DL
n catch(IOException e){e.printStackTrace ();} AYi$LsLhO catch(Exception e){e.printStackTrace ();} hug12Cu } ,ZSuo4 +38t82%YWo VYwaU^ //读取保存的下载信息(文件指针位置) s-*XAnot private void read_nPos() R8KL4g-d { +%yh@X6 try{ [Xrq+O, DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); cE3co(j int nCount = input.readInt(); 5IepVS(>?v nStartPos = new long[nCount]; (#:Si~3 nEndPos = new long[nCount]; ;9~z_orNQZ for(int i=0;i<nStartPos.length;i++) _I9TG.AA. { GHkSU;}) nStartPos = input.readLong(); ,%C$~+xjM nEndPos = input.readLong(); (mEZ4yM } ;(sb^O input.close(); ]8^2(^3ct } WM#!X!Vo catch(IOException e){e.printStackTrace ();} AIeYy-f catch(Exception e){e.printStackTrace ();} 0C7"*H0R } bhI8b/ S$#Awen"@ myo/}58Nv private void processErrorCode(int nErrorCode) )-9/5Z0v { [kXe)dMX8 System.err.println("Error Code : " + nErrorCode); = FE,G* } $$4% .J26Z
4@5<B X>CYKRtb //停止文件下载 DFiexOb public void siteStop() (X8N?tJ { L]VK9qB bStop = true; T&c[m!}X|t for(int i=0;i<nStartPos.length;i++) 7+c@pEU] fileSplitterFetch.splitterStop(); r'8e"pTi PyoLk 4e:hKv,+4 } e' Zg F~ } Wj3H
y4 //负责部分文件的抓取 aV ^2 **FileSplitterFetch.java 8dpVB#]pp, */ -&&mkK
B! package NetFox; P)H%dJ^l TQ BL!w WlY%f}ln import java.io.*; PQ5DTk import java.net.*; -{<%Wt9 B)(A#&nrb #qPk ,a public class FileSplitterFetch extends Thread { C?|gf?1p >!$4nxq2> 3drgB;:g` String sURL; //File URL Y5;:jYk#<_ long nStartPos; //File Snippet Start Position +V) (,f1 long nEndPos; //File Snippet End Position QW!'A`*x int nThreadID; //Thread's ID y0Tb/&xN boolean bDownOver = false; //Downing is over >?kt3.IQ!X boolean bStop = false; //Stop identical YONg1.^!( FileAccessI fileAccessI = null; //File Access interface JmBYD[h, kN_LD- h$k(|/+ public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException T7,tJk,( { ^a(q7ZfY this.sURL = sURL; u]}Xq{ZN this.nStartPos = nStart; |9g*rO this.nEndPos = nEnd; U3Q'ZT nThreadID = id; 4, :D4WYWD fileAccessI = new FileAccessI(sName,nStartPos);//定位 Wc)^@f[~< } w "D"9G X:dj5v Ro1l:P)C` public void run() [)a,rrhj { GY!&H"% while(nStartPos < nEndPos && !bStop) 9uq|
VU5 { A_g'9 3w-0v"j U mF_/Rhu try{ )j$Bo{ URL url = new URL(sURL); -H]svOX HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); $Fn# b|e httpConnection.setRequestProperty("User-Agent","NetFox"); 8xNKVj)@ String sProperty = "bytes="+nStartPos+"-"; (R0 httpConnection.setRequestProperty("RANGE",sProperty); H'Po Utility.log(sProperty); c"|^Lo.
Wbc %G8 mX#T<_=d InputStream input = httpConnection.getInputStream(); zR/ATm]9 //logResponseHead(httpConnection); {c$W-t):U|
$%jV%k M_PL{ byte[] b = new byte[1024]; d BJM?/ int nRead; 3:C *'@ while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) MXhS\vF#m { 9|go`^*. nStartPos += fileAccessI.write(b,0,nRead); /E*P0y~KTW //if(nThreadID == 1) ]M2> %Dvw // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); TKmC/c } UqAvFCy ljk-xC p/ _Q7)FK Utility.log("Thread " + nThreadID + " is over!"); @P8q=j}l9 bDownOver = true;
R)H@'X //nPos = fileAccessI.write (b,0,nRead); ~"LOw_BRh } Wl*\kQ}U catch(Exception e){e.printStackTrace ();} 0!^{V:DtQ } UgUW4x'+ } jW6@U%[!b wOOPuCw? kt@+UK." //打印回应的头信息 h rZ\ O?j public void logResponseHead(HttpURLConnection con) Qdtfi1_Y1 { ";GLX%C!{@ for(int i=1;;i++) 9eV@v { = 7jkW (Q String header=con.getHeaderFieldKey(i); aC:rrS if(header!=null) D3jP hPy. //responseHeaders.put(header,httpConnection.getHeaderField(header)); UH)A n:9 Utility.log(header+" : "+con.getHeaderField(header)); Z(V4"x7F else EswM#D9(4 break; [6c{t } >si<VCO } 2Aff3]-:Gd <|.M]]}j kQj8;LU public void splitterStop() H6~QSe0l { alq>|,\x bStop = true; }e82e } Kr9 @ ;z&p(e 6#.R'O } l
lQ<x jx-W$@ K%Rx5 S /* ' rXkTm1{ **FileAccess.java
LDbo *//文件访问(定位,写) ;ymUMQ%;/ package NetFox; r*kk/$,2 import java.io.*; n9)/(=)>* haY.rH]z ]qrO"X= public class FileAccessI implements Serializable{ <8H`y(S [ jafPi(#g //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 c|I{U[(U RandomAccessFile oSavedFile; xOS4J+' s@ long nPos; LEk
W^Mv ^*Ca+22xO af> i public FileAccessI() throws IOException b|4h2iuM { 2#sE\D this("",0); p[W8XX } 1N2:4|woe d`v]+HK ty(F;M( public FileAccessI(String sName,long nPos) throws IOException br0gB3r { {lqnn n3 oSavedFile = new RandomAccessFile(sName,"rw"); \b'
<q this.nPos = nPos; {At1]> oSavedFile.seek(nPos); ]2v31' } W~gFY#w sYeZ.MacU vZ|m3;X public synchronized int write(byte[] b,int nStart,int nLen) Bm^vKzp { {y :/9 int n = -1; 7|H !( a' try{ 2&P'rmFm oSavedFile.write(b,nStart,nLen); fLPB *y6 n = nLen; 3:S
Ex;d+ } V}3.K\7 catch(IOException e) * \f(E#wa { ;@Ls"+g e.printStackTrace (); uI+h9j$vS } ][D<J0 ?-*_v//g )=8X[<^i return n; _4.fT }
_ 57m] ;& Y]ZOvA5W ='YR; } fNQ.FAK": fU$zG"a_ xpUaFb /* -<qci3Ba} **SiteInfoBean.java rW!P~yk */ \u:xDS( package NetFox; wS8qua nIXq2TzJ :fo%)_Jc! public class SiteInfoBean { 1P&c:n R$NH [Tz YQ2ie>C8 private String sSiteURL; //Site's URL *O+YhoR? private String sFilePath; //Saved File's Path ,HR~oT^ private String sFileName; //Saved File's Name K+PzTGWq^ private int nSplitter; //Count of Splited Downloading File 0E{$u P|c79 +d]} public SiteInfoBean() u|B\@"0 {//nSplitter的缺省值为5 \O`B@!da~ //default value of nSplitter is 5 hE+6z%A8 this("","","",5); %I[(`nb } .-fJ\`^mi hyFq>XFo TRG"fVR public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) GIt;Y { 'V .4Nhd sSiteURL= sURL; Spt[b.4m F sFilePath = sPath; ^[lg1uMW sFileName = sName; _qM'm^z5 this.nSplitter = nSpiltter; ;?bRRW *p p1U>, pT:CvJ } &A]*"lt|w ]MRE^Je\h 8K7zh.E public String getSSiteURL() rB)m{) { 'GS1"rkW<5 return sSiteURL; A\k@9w\Ll; } DBbmM*r -Z)$].~|t 0g~WM public void setSSiteURL(String value) ^=}~ { E.t9F3 sSiteURL = value; { SJ=|L6 } WSKG8JT^| I
Yj\t?,0 WUMx:a0! public String getSFilePath() &YDb/{|CIC { XBdC/DM[ return sFilePath; No!P? } +.mIC:9 !nC Z, NhS0D=v6 public void setSFilePath(String value) ~`u?|+*BO { c-n'F+fZ sFilePath = value; wnN@aO6g* } 9c4 6| dGrOw) 5d<-y2!M public String getSFileName() coiTVDwA { O=G2bdY{, return sFileName; v5RS <?o } !634 8nU: v93+<@Z R1\cAP^0 public void setSFileName(String value) Y:ZI9JK? { X_!Sm sFileName = value; z@{|Y;s } ko>SnE|w# 3JWHyo L5]*ZCDv public int getNSplitter() Gq$9he< { u'<Y#bsR#/ return nSplitter; 2P"@=bYT " } [}+0NGgR (S=::ODU *<OWd'LI public void setNSplitter(int nCount) w[n|Sauy, { 3T|:1Nw nSplitter = nCount; 6WzE'0Nyr } VgN`'
iC`I } #}^ZxEU gh['T, K&Ht37T /* 9L*gxI> **Utility.java &:nWZ!D */ mAX]m 1s package NetFox; -P!vCf^{
t sO~N2 1W"9u public class Utility { Cx}
Yp- oy;N3 WIQt5=- public Utility() kZWc(LwA { iEsI 8n,i5>!d I^qk` 5w } rPZ< 3Yp_k //线程睡眠 O HR9u public static void sleep(int nSecond) ]9]3=;b> { ZL+{?1&- try{ Wu2#r\
Thread.sleep(nSecond); T=A7f6` } LrsP4G catch(Exception e) 1x V~EX { B@63=a*kG e.printStackTrace (); :2
n5;fp } [64K?l0& } C;OU2,c,T tv,^ Q} //日志 vpMNulXb, public static void log(String sMsg) H2zd@l:R { Km'd=B>Jy System.err.println(sMsg); VjMd&>G } fFqK.^Tn .]k(7F!W %Jq(,u public static void log(int sMsg) q}M^i7IE { C'
o4Su# System.err.println(sMsg); 3Nsb@0 } Ni(D[?mZ } @j9yc 3r%I * b,#cc>76\ /* Vj:)w<], **TestMethod.java ygd'Nh!@ */ #D
.H2'_} package NetFox; <T+Pw7X Yc"G="XP; _ _-rP public class TestMethod { qV@xEgW#r F'C]OMBE Yu9Ccj` public TestMethod() g5M-Vu { ///xx/weblogic60b2_win.exe |2
g }i\ try{ Ipb4{A&"\ SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); &julw;E //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); V<\:iNXX{ SiteFileFetch fileFetch = new SiteFileFetch(bean); gA`/t e fileFetch.start(); ?$ Uk[ } <$Q&n{ catch(Exception e){e.printStackTrace ();} 8T&m{s )fA9,yNJ3 -+'{C= } pE^L Qi 5u~Ik c~ deda=%w0 public static void main(String[] args) z=?ainnKx { Nr|.]=K)5n new TestMethod(); ^X)U^Qd } x*}(l%[ } &.K8cphj 点击下载更多相关资料
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