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/* i$6rnS&C **SiteFileFetch.java >1Hv c7DP */ ){'<67dK package NetFox; /d:hW4}<}. import java.io.*; Y_jc *S import java.net.*; D|m3.si /VufL+q1 *>mjUT}cP public class SiteFileFetch extends Thread { "-X8 s2|.LmC3|B S1Od&v[R SiteInfoBean siteInfoBean = null; //文件信息Bean kV T |(Y long[] nStartPos; //开始位置 (Sgsy^|N long[] nEndPos; //结束位置 tD}-&"REP FileSplitterFetch[] fileSplitterFetch; //子线程对象 6B7*|R> long nFileLength; //文件长度 `O0Qtq. boolean bFirst = true; //是否第一次取文件 c^pQitPv boolean bStop = false; //停止标志 6m(? (6+;K File tmpFile; //文件下载的临时信息 _,aFQ^]'9 DataOutputStream output; //输出到文件的输出流 P!IA;i QKts-b[3 //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) 4u%AZ<-C}m public SiteFileFetch(SiteInfoBean bean) throws IOException +75"Q:I { jXALL8[c siteInfoBean = bean; (GpP=lSSeY //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); [M%?[E}> tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); ,]: <l if(tmpFile.exists ()) a:UkVK]MP { r4K9W90 bFirst = false; !9KDdU read_nPos(); W#NZnxOX" } FGyrDRDwC else p_&B+
<z { !z4I-a nStartPos = new long[bean.getNSplitter()]; sZr \mQ~ nEndPos = new long[bean.getNSplitter()]; }[UH1+`L } K\;4;6g 7.ein:M|CB Wex2Fd?DO ED79a: } 4^:dmeMZ` -.MJ3 AA=rjB9 public void run() r*$f^T!| { %k['<BYG< //获得文件长度 E# 8|h( //分割文件 Shy.:XI //实例FileSplitterFetch .$W} //启动FileSplitterFetch线程 @sZ7Ka //等待子线程返回 X@tA+ try{ F
{L# if(bFirst) ocK4Nxs { hFr+K1 nFileLength = getFileSize(); u t4:LHF if(nFileLength == -1) tKLeq( { MnF|'t System.err.println("File Length is not known!"); ILH[q> } 5EI"5&`* else if(nFileLength == -2) mk!8>XvM { w42{)S" System.err.println("File is not access!"); SC4jKm2 } sH2xkUp else XP% _|Q2X { 7_qsVhh]$E for(int i=0;i<nStartPos.length;i++) .|07IH/Di{ { VWK/(>TP nStartPos = (long)(i*(nFileLength/nStartPos.length)); Ank_;jo } dz/fSA for(int i=0;i<nEndPos.length-1;i++) kv2o.q { uuD2O )v nEndPos = nStartPos[i+1]; \I4Uj.'>\ } 1D8S}=5& nEndPos[nEndPos.length-1] = nFileLength; CPcUB4a%# } W=293mME } ~'0n
]Fw 0]'
2i *?uUP //启动子线程 ;'V[8`Z@ fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; DO*6gzW for(int i=0;i<nStartPos.length;i++) 1pDU}rPJ. { 7]5~ml3: fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), P{`fav siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), PyHL`PZZ nStartPos,nEndPos,i); V/"RCqY4 Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); ;Wk3>\nT- fileSplitterFetch.start(); +,ar`:x&a } H\<0{#F // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), C\BKdx5; siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); yY49JZ // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", P(8
u L|^ nEndPos = " + nFileLength); |P|2E~[r // fileSplitterFetch[nPos.length-1].start(); O_th/hl [qkW/qS {6qxg _{ //等待子线程结束 i(.PkYkaq //int count = 0; 9 4lt?|3= //是否结束while循环 (yd(ZY boolean breakWhile = false; p=x&X~
h]z 8.k2n =B;qy7? while(!bStop) P~:^bU^F7 { T8&sPt,f write_nPos(); 7^! zT Utility.sleep(500); Xg_l4!T_l breakWhile = true; s/11TgJ w?nSQBz$ w;AbJCv2 for(int i=0;i<nStartPos.length;i++) $qZ6i { |HY{Q1% if(!fileSplitterFetch.bDownOver) =1|p$@L`% { 55<!H-zt breakWhile = false; )*uo tV break; +/mCYI } <^KW7M}w*c } @RuMo"js if(breakWhile) G}NqVbZ9] break; ><S2o%u~ 5pY|RV6: Ic!x y //count++; saQ
~v@ //if(count>4) #X$s5H // siteStop(); -:45Q{u/ } ^
.A xmC5uT6L3M N z=P1&G' System.err.println("文件下载结束!"); L5KcI } KY%qzq,n catch(Exception e){e.printStackTrace ();} 9X33{ } Tl-%;X<X 7AGUi+!ICl wEI?
9 //获得文件长度 ".#h$ public long getFileSize() ~Cyn w( { ttlMZLX{TJ int nFileLength = -1; Y@MxKK uj try{ 3?_%|;ga URL url = new URL(siteInfoBean.getSSiteURL()); 'BgR01w J HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); ;KmrBNF httpConnection.setRequestProperty("User-Agent","NetFox"); (0_zp`) |{ZdAr.; x*TJYST int responseCode=httpConnection.getResponseCode(); ScVbo3{m*T if(responseCode>=400) j!k$SDA- { r#w 7qEtD processErrorCode(responseCode); Z]k@pR ! return -2; //-2 represent access is error $1zWQJd[- } !SGRK01 TEj"G7]1$A xy&*s\=: String sHeader; wzoT!-_X Rd]<591 NzM ,0q for(int i=1;;i++) L %ifl:K { `}$bJCSF.n //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); Jx`7W1%T //Utility.log(in.readLine()); +eLL)uk sHeader=httpConnection.getHeaderFieldKey(i); L
9cXgd if(sHeader!=null) mC0Dj O { i=P}i8,^= if(sHeader.equals("Content-Length")) P&tw!B { *a{WJbau] nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); tBl(E break; ^x^(Rk}| } l)jP!k } :1gpbfW else #a
tL2(wJ break; [4dX[ } ? `kZ 6$ } W.D>$R2 catch(IOException e){e.printStackTrace ();} t pxk8Ys catch(Exception e){e.printStackTrace ();} JdWav!PYm {'{9B m,]9\0GUd Utility.log(nFileLength); 9p^gF2?k ]8Xip/uE Clap3E|a return nFileLength; Ja/ } [[';Hi^ aZtM
_ (q}LirR //保存下载信息(文件指针位置) }:J-o private void write_nPos() H}CmSo8& { q68m*1?y try{ [!uVo>Q4 output = new DataOutputStream(new FileOutputStream(tmpFile)); ^1_[UG output.writeInt(nStartPos.length); AqaMi for(int i=0;i<nStartPos.length;i++) d(b~s2\i { [io|qLr}\ // output.writeLong(nPos); -m
;n}ECg output.writeLong(fileSplitterFetch.nStartPos); a=9QwEZ output.writeLong(fileSplitterFetch.nEndPos); oQo5y_o~ } ]P>XXE;[ output.close(); BD^1V(
I/ } H(M{hfa| catch(IOException e){e.printStackTrace ();} m"'`$ /_ catch(Exception e){e.printStackTrace ();} IAe/) } qss)5a/x. YGc:84S )_4()#3 //读取保存的下载信息(文件指针位置) MtoOIkQ private void read_nPos() {5d 5Y%& { =2} kiLKO try{ fl2XI=[v4 DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); ga S}>?qk int nCount = input.readInt(); )DlKeiK nStartPos = new long[nCount]; fYh<S nEndPos = new long[nCount]; n:k4t for(int i=0;i<nStartPos.length;i++) +#< Z/ { M1*bT@6 nStartPos = input.readLong(); ###>0(n nEndPos = input.readLong(); AR$SQ_4 } )%n$_N n input.close(); k{UeY[,jb } b&LAk-}[ catch(IOException e){e.printStackTrace ();} l5KO_"hy catch(Exception e){e.printStackTrace ();} 27$,D XD } L<Z,@q` Xw7'I :rjfAe=s private void processErrorCode(int nErrorCode) apfr>L3 { iXvrZofE System.err.println("Error Code : " + nErrorCode); HTvUt*U1 } _)~VKA]"" n}(A4^=4KQ K1]3zLnS //停止文件下载 1Ax;|.KQH public void siteStop() *0Fz." v { dB0
UZirb bStop = true; %k )H7nj for(int i=0;i<nStartPos.length;i++) y%kZ## fileSplitterFetch.splitterStop(); u3pFH( %NC/zqPH~ M:iH7K } e6jA4X+a } |(PS
bu //负责部分文件的抓取 ,_,*I/o>B **FileSplitterFetch.java ae]6F_Qtc* */ d~{$,"!-f package NetFox; X|ZAC!J5> =_ b/g K,%CE
]. import java.io.*; d2-oy5cEB import java.net.*; .V3e>8gw3 W}MN-0 UF*R1{ public class FileSplitterFetch extends Thread { P~iZae
jiLJiYMg "dvo@n| String sURL; //File URL ;YW@ 3F-h long nStartPos; //File Snippet Start Position VYO1qj long nEndPos; //File Snippet End Position 7\R"RH- int nThreadID; //Thread's ID .q[}e);) boolean bDownOver = false; //Downing is over D>HbJCG4^ boolean bStop = false; //Stop identical CgYX^h?Y9 FileAccessI fileAccessI = null; //File Access interface |d*a~T0 lmD[Cn n9`]}bnX public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException .uxM&|0H { aJA( UN45 this.sURL = sURL; R<{Vgy this.nStartPos = nStart; ;z N1Qb this.nEndPos = nEnd; +{I" e,Nk nThreadID = id; %%>nM'4< fileAccessI = new FileAccessI(sName,nStartPos);//定位 $AE5n>ZD$ } x-%RRm<V ftl?x'P% M6Np!0G public void run() e"NP]_vh, { #Nco|v while(nStartPos < nEndPos && !bStop)
:2,NKdD { \hBzP^*"n ~dp f1fP Qx8(w"k* try{ CS(2bj^6D URL url = new URL(sURL); p:W] HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); gt02Csdt httpConnection.setRequestProperty("User-Agent","NetFox"); ;+6><O!G String sProperty = "bytes="+nStartPos+"-"; ctjQBWE httpConnection.setRequestProperty("RANGE",sProperty); &vn2u bauS Utility.log(sProperty); pi/0~ke4" x|G
:;{"+6 1;V_E2?V InputStream input = httpConnection.getInputStream(); ~!8j,Bqs+z //logResponseHead(httpConnection); QKlsBq f86Z #% m_@XoS
yxI byte[] b = new byte[1024]; 0< vJ*z|_ int nRead; q^Oj/ws while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) dIYf}7 P { 9!W$S[ABRB nStartPos += fileAccessI.write(b,0,nRead); +jF2{" //if(nThreadID == 1) q#8yU\J|, // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); Ro"'f7(v. } PoPR34]^J LbRQjwc]W HG?+b Utility.log("Thread " + nThreadID + " is over!"); i$PO#} bDownOver = true; #ye`vD //nPos = fileAccessI.write (b,0,nRead); ljOY;WV3 } kROIVO1|` catch(Exception e){e.printStackTrace ();} mTxqcQc:7 } N!3Tg564j } z8JW iRn 2b^Fz0
w4 rqqd} kA //打印回应的头信息 &0-oi Y public void logResponseHead(HttpURLConnection con) liH#=C8l*% { 'Kbrz for(int i=1;;i++) wL="p) TO. { /W BmR R String header=con.getHeaderFieldKey(i); QDJ
"X if(header!=null)
QSY>8P //responseHeaders.put(header,httpConnection.getHeaderField(header)); $/IFSB9 Utility.log(header+" : "+con.getHeaderField(header)); +,LWyvc' else tO:JB&vO2 break; vszm9Qf } HdB>CVuh } KU9FHN }YFM40H 111A e*U public void splitterStop() 5:f!EMb { f'@ L|&w bStop = true; 2tpu v(H; } C)EP;5k'!\ A`Y^qXFb` It&CM,=t } TPk?MeVy%W Wtcib- SM4`Hys;p /* B\)Te9k' **FileAccess.java TaBya0- *//文件访问(定位,写) DR}I+<*%aD package NetFox; _Tor9Tj import java.io.*; 2*z~'i uMZ~[Sz n>j2$m1[ public class FileAccessI implements Serializable{ :e;6oC*"q DlE, aYB //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 $">j~! ' RandomAccessFile oSavedFile; nf 8V:y4 long nPos; FrXP"U}Y Nn FR; R2sG'<0B0 public FileAccessI() throws IOException [B)! { 5 k3m"* this("",0); /u4RZ|&as } C`g
"Mk8 3rH}/`d4 @GQfBV|3 public FileAccessI(String sName,long nPos) throws IOException P{6$".kIY { jL"V0M]c oSavedFile = new RandomAccessFile(sName,"rw"); '!7>*< this.nPos = nPos; Lxv 4w oSavedFile.seek(nPos); U\?D;ABQ% } 49&i];:%7% +?o!"SJ uo]xC+^ public synchronized int write(byte[] b,int nStart,int nLen) &3Zb? { rBTg"^jsw int n = -1; X_o#! try{ iv *$!\Cd oSavedFile.write(b,nStart,nLen); %0C [v7\ n = nLen; .F 6US<] } },l
i'r#p catch(IOException e) \~E?;q! { D0FX"BY7 e.printStackTrace (); 3P2{M}WIl } P|$n W4^zKnH [:cD return n; ;kk[x8$ } Intuda7e1 b},2A'X G^k'sgy. } 5+M,X kg s;OGb{H7 L?d?O /* }h45j84) **SiteInfoBean.java :C} I6v= */ lK=Is
v+ package NetFox; u_^mN9h IRm}?hHf ,Zn6T"[$ public class SiteInfoBean { H%vfRl3rB >S7t ?pW1}:z
private String sSiteURL; //Site's URL ;um)JCXz private String sFilePath; //Saved File's Path l&+O*=#Hh private String sFileName; //Saved File's Name BJux5Nh private int nSplitter; //Count of Splited Downloading File r{R<J?Y );d 07\V j9>[^t3U public SiteInfoBean() w{*kbGB8s7 {//nSplitter的缺省值为5 KSchgon0V //default value of nSplitter is 5 <!Cjq,Sk7 this("","","",5); h$'6."I } 6U*CR=4
l!x+K& zX_F+"]THt public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) O3o^%0 {
Xs052c|s sSiteURL= sURL; metn& sFilePath = sPath; mxgT}L0i sFileName = sName; t8-Nli*O this.nSplitter = nSpiltter; uAA2G\3 b_~XTWP$l `&D#P% } x*vD^1"'P ~ps,U hAf/&yA@ public String getSSiteURL() Z8$BgP { (uvQ/! return sSiteURL; }( F:U# } z;1dMQ,# T$D(Y`zdn hE {";/}J public void setSSiteURL(String value) QGuqV8 y0 { S=r0tao,!v sSiteURL = value; TxPFl7,r } 9-T<gYl T-a>k.}y e
n~m)r3& public String getSFilePath() Sxq@W8W { ck{S return sFilePath; T5u71C_wmt } 1- s(v)cxh 66pjWS
{X Pjs=n7 public void setSFilePath(String value) (SRY(q { >; MJm sFilePath = value; Q<V(#)* } 61H_o7XXk Xb%Q%"?~ AaYH(2m- public String getSFileName() !ddyJJ^a { Q[#}Oh6$ return sFileName; N4ZV+
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} ({j8|{)+ rgVRF44X{ dHIk3j-! public void setSFileName(String value) Q)0KYKD+@ { Qz[^J sFileName = value; /Ot3[B } $,~Ily7w ;-VZV p}Y r"2lcNE public int getNSplitter() .m]}Ba}J$ { pZ>yBY?R8> return nSplitter; [o<hQ`& } v>wN
O
%!nI]| !vf:mMo public void setNSplitter(int nCount) 8+[Vo_] { &qS%~h%2 nSplitter = nCount; BjfVNF;hk: } I/njyV)H } u"qVT9C$= ]Kq<U%x$ cRf F!EV /* X~jdOaq{F: **Utility.java c`xNTr01 */ ,)[9RgsE package NetFox; b$DiDm U/enq,-F^ 0]SWyC
: public class Utility { ikc1,o eI:[o ? #rXc%F public Utility() oY^I|FEOz { G~5pMyOR |2l-s 1|y )oCL![^pXe } q2E{o)9 3cghg._ //线程睡眠 "6'", public static void sleep(int nSecond) f8lyH'z0
@ { $Lj]NtO try{ <u\Hy0g Thread.sleep(nSecond); b5|*p(7[ } M3-lL;!n catch(Exception e) ,A{Bx`o? { DKt98; e.printStackTrace (); 7=Muq]j2 } our
^J8 } yDqwz[v b iKaX8c,zI //日志
/#Pm'i>B public static void log(String sMsg) u"qu!EY2 { "j_iq"J System.err.println(sMsg); "a[;{s{{. } vSnVq>-q& 3`reXms*{ u9f^wn public static void log(int sMsg) v<v;Z R) { }3: mn System.err.println(sMsg); W$`v^1M2o } *:H,-@ } jz<}9Kze .rk5u4yK s-rc0:I /* o)5zvnu7 **TestMethod.java twr{jdY9 */ v,}C~L3 package NetFox; n0 l|7:Mk ?sQg{1"Zr )r46I$]> public class TestMethod { gg#9I(pX Ll=G+cw6P 6HCg<_j] public TestMethod() q#3T
L< { ///xx/weblogic60b2_win.exe %J1'>nI!q try{ # QwX|x{ SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); 6c]4(%8 //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); @;eH~3P SiteFileFetch fileFetch = new SiteFileFetch(bean); 6 EqN>. fileFetch.start(); 3yRvs;nWS } F\N0<o catch(Exception e){e.printStackTrace ();} 7#C$}1XJ1 \L(jNN0_R bWA_a]G } 9!jF$ I+
|uyc d\#yWY public static void main(String[] args) AVjRhe { f0g/`j@Up new TestMethod(); n@+?tYk*e } sX6\AYF1M } N-2#-poDe 点击下载更多相关资料
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