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/* =gj]R **SiteFileFetch.java ^yX
W.s */ \&cVcAg package NetFox; 3B_S>0H"$ import java.io.*; A(C3kISM import java.net.*; g` Wr3 <l\FHJhjq )S`A+M K] public class SiteFileFetch extends Thread { v\<`" 3:C *'@ hP|5q&wX SiteInfoBean siteInfoBean = null; //文件信息Bean :O{ :;X) long[] nStartPos; //开始位置 xv)7-jlx long[] nEndPos; //结束位置 ~v5tx FileSplitterFetch[] fileSplitterFetch; //子线程对象 n"Ev25% long nFileLength; //文件长度 0
xXAhv-)O boolean bFirst = true; //是否第一次取文件 ]\GGC]:\@
boolean bStop = false; //停止标志 Lrk^<:8; File tmpFile; //文件下载的临时信息 Wl*\kQ}U DataOutputStream output; //输出到文件的输出流 )Ev [o#y U$-FQRM4K //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) &r_:n t public SiteFileFetch(SiteInfoBean bean) throws IOException 8>w/Es5 { O[N{&\$ siteInfoBean = bean; 'al-C;Z //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); u!F3Rh8D tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); gs. K,x ma if(tmpFile.exists ()) Yu8WmX,[ { ZGS=;jM bFirst = false; pIh@!C read_nPos(); ?1[go+56X } 2Aff3]-:Gd else |S.-5CAh4 { j\W+wnAgk nStartPos = new long[bean.getNSplitter()]; ,CCIg9Pt nEndPos = new long[bean.getNSplitter()]; j6Vuj/+} } #$8tBo =7$YBCuF #-@dc WjA)0HL( } 0z,c6MjM+ v!W,h2:J YAO.Cc z public void run() t4,6`d?C { }U8H4B~UtY //获得文件长度 ysSEgC3 //分割文件 f}@]dF r //实例FileSplitterFetch [ jafPi(#g //启动FileSplitterFetch线程 YWm:#{n. //等待子线程返回 V+E2nJ try{ 1tD4I if(bFirst) hLBX,r)u { &oAuh?kTq nFileLength = getFileSize(); d,$[633It} if(nFileLength == -1) [t0gX dU6 { @O4m-Oosi System.err.println("File Length is not known!");
^d!-IL_ } 0C3CqGP else if(nFileLength == -2) c.NAUe_3 { Ii;~ xc System.err.println("File is not access!");
}mX;0qO } u dH7Q&" else :^px1 { FCOSgEU for(int i=0;i<nStartPos.length;i++) ]x~H"<V { eoow]me nStartPos = (long)(i*(nFileLength/nStartPos.length)); "&7v.-Yk( } uI+h9j$vS for(int i=0;i<nEndPos.length-1;i++) #K
]k { *-gS u nEndPos = nStartPos[i+1]; M)Y`u } j#o0y5S nEndPos[nEndPos.length-1] = nFileLength; x@Q}sW92 } Z~$fTW6g } E@t^IGDr tZ4W]od 0hCJovSG% //启动子线程 \O@,v0?R fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; KeY)%{ for(int i=0;i<nStartPos.length;i++) YW}1Mf=_ { :Bda]]Y= fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), t[7YMk siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), *O+YhoR? nStartPos,nEndPos,i); NaLec|6<t Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); 1 vi<@i, fileSplitterFetch.start(); IL`5RZi1 } +d]} // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), 8!E$0^)c| siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); |Q.t]TR'P // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", 6i, d| nEndPos = " + nFileLength); omY%sQ{) // fileSplitterFetch[nPos.length-1].start(); F5:4 B]ZF n
omtP } NSj}?hz //等待子线程结束 c.,eIiL //int count = 0; 61b,+'- //是否结束while循环 A'p"FYlCW boolean breakWhile = false; |$^,e%bE hAKyT~[n0 8K7zh.E while(!bStop) 7DXT1+t { p%_r0 write_nPos(); kR9G;IZ8s Utility.sleep(500); 0g~WM breakWhile = true; ^`Vt<DMT { SJ=|L6 {PWz:\oaD for(int i=0;i<nStartPos.length;i++) I
Yj\t?,0 { ey@y?X= if(!fileSplitterFetch.bDownOver) _hK7hvM> { n-}.Yc breakWhile = false; ,m9Nd "6\ break; &}wKC:LSP } p;U[cGHC } `yNNpSdS1 if(breakWhile) Y)?4OB=n break; I?Hj,lN
|C\g 3N- &X9#{:l= //count++; 7f~DD8 R //if(count>4) 's(0>i // siteStop(); +TfMj1Zx } 0&$e:O'v hnmFhJ !g G]=U=9ZI System.err.println("文件下载结束!"); Lb{~a_c } 9v_gR52vh catch(Exception e){e.printStackTrace ();} 7a->"W } 8HxB\ !0F? {y)s85:t gjk=`lU //获得文件长度 rX{QgyY&
public long getFileSize() gh['T, { [`yiD> int nFileLength = -1; &:nWZ!D try{ A|c :&i URL url = new URL(siteInfoBean.getSSiteURL()); j}X4#{jgC HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); hSQP
'6 httpConnection.setRequestProperty("User-Agent","NetFox"); oy;N3 P5%DvZB$w d]}
7] int responseCode=httpConnection.getResponseCode(); NV^ktln if(responseCode>=400) P>0j]?RB { pIqPIuy processErrorCode(responseCode); rPZ< return -2; //-2 represent access is error D-8%lGS } N`Zm[Sv7 "mSDL:$ 9c}LG5 String sHeader; {Ejv8UdA9 K/,
B P zzX Ds6 for(int i=1;;i++) ;_F iiBk7( { |rq~.cA //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); Go^W\y
//Utility.log(in.readLine()); i('z~ sHeader=httpConnection.getHeaderFieldKey(i); yaa+j8s] if(sHeader!=null) |U8;25Y { {t;Q#Ou. if(sHeader.equals("Content-Length")) '_4u,
\SG { uY5f mM9 nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); *J 7>6N:- break; 'i%Azzv } Z@RAdwjR`p } ePrbG4xv else Fu^^Jex break;
i/y+kL } ^pKC0E[% } '4L
i catch(IOException e){e.printStackTrace ();} F'C]OMBE catch(Exception e){e.printStackTrace ();} 6(ju!pE` |2
g }i\ dWg$yH Utility.log(nFileLength); hh |'Uq3
&j2L-) VS%8f.7ep return nFileLength; u8~.6]Ae } ]Q6,,/nn 4T Gg`$e; "3Ag+>tuRW //保存下载信息(文件指针位置) E IsA2 f private void write_nPos() 4:nmo@K&~ { aS'G&(_ try{ {1#5\t>9yD output = new DataOutputStream(new FileOutputStream(tmpFile)); 1k-^LdDj output.writeInt(nStartPos.length); ]\+bx= for(int i=0;i<nStartPos.length;i++) [77]0V7 { s,]6Lri`\ // output.writeLong(nPos); CImB,AXS output.writeLong(fileSplitterFetch.nStartPos); !r.X. C output.writeLong(fileSplitterFetch.nEndPos); \7$m[h{l } FOquQr1cF output.close(); Mf%/t HK } v9x $` catch(IOException e){e.printStackTrace ();} QI0ARdS catch(Exception e){e.printStackTrace ();} G\*`EM4 } P-7!\[];te !CPv{c`|qg j<"0ym)A //读取保存的下载信息(文件指针位置) i._d^lR\t private void read_nPos() L)y } { U5dJ=G try{ eq(|%]a= DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); U87VaUr int nCount = input.readInt(); No=f&GVg nStartPos = new long[nCount]; h'MX{Wm. nEndPos = new long[nCount]; t{F6+d p for(int i=0;i<nStartPos.length;i++) o!sxfJKl { cK@O)Ko} nStartPos = input.readLong(); unSF;S< nEndPos = input.readLong(); AH`tkPd } >J.a,! input.close(); 9oKRu6]D- } AJCWp4, catch(IOException e){e.printStackTrace ();} h&h]z[r R catch(Exception e){e.printStackTrace ();} yoGE#+|7^ } va~:oA _^#PV} Sn7.KYS private void processErrorCode(int nErrorCode) o1GWcxu*\ { D 67H56[ System.err.println("Error Code : " + nErrorCode); _q3SR[k+` } a9FlzR I".d>]16| F]M3/M //停止文件下载 [M FV:Z public void siteStop() ds5<4SLj { Vxo3RwmR bStop = true; #uu wzE*M_ for(int i=0;i<nStartPos.length;i++) |PI.xl:ch fileSplitterFetch.splitterStop(); q^(A6W I BES$[ 5C#&vYnq } FRs5 Pb1 } :L*CL 8m //负责部分文件的抓取 ^R>&^"oI **FileSplitterFetch.java _.?$~;7 */ rf1-E5 7# package NetFox; V9B $_j4 sAnStS=> M?)>,
!Z) import java.io.*; ;2#7"a^ import java.net.*; B<8Z?:3YS SV6Np?U 8Vl!&j0s^ public class FileSplitterFetch extends Thread { {P1W{| #FTXy>W )oAK)e String sURL; //File URL \-V long nStartPos; //File Snippet Start Position ZLE4XB] long nEndPos; //File Snippet End Position dXrv int nThreadID; //Thread's ID lYQcQ*- boolean bDownOver = false; //Downing is over ME0ivr*=: boolean bStop = false; //Stop identical ,h8)5Mj/J FileAccessI fileAccessI = null; //File Access interface ?>4^e: @105 @9F ZiVT c/b public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException NBUM* Z { CFRo>G this.sURL = sURL; PuUqWW'^ this.nStartPos = nStart; iCc@N|~ this.nEndPos = nEnd; L.+5`& nThreadID = id; T3'dfe U fileAccessI = new FileAccessI(sName,nStartPos);//定位 vERsrg;( } g>VkQos5" G78rpp ;I5HMc_a" public void run() 3<'SnP3mY { l#]Z?zW. while(nStartPos < nEndPos && !bStop) |_!xA/_U'T { /+02BP 7th&C,c& mQo]k try{ |}'}TYX0: URL url = new URL(sURL); 0o`0Td HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); '3%!Gi!g httpConnection.setRequestProperty("User-Agent","NetFox"); Z{u*vUC& String sProperty = "bytes="+nStartPos+"-"; pX6OhwkTK httpConnection.setRequestProperty("RANGE",sProperty); i1|- Utility.log(sProperty); )0qXZgs B-r9\fi, QJOP *<O InputStream input = httpConnection.getInputStream(); D/@:wY //logResponseHead(httpConnection); MEq
()}7P RFQa9Rxk {PYN3\N, byte[] b = new byte[1024]; X$PT-~!a int nRead; 8.]dThaq while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) B6$s*SXNp { 9Z7o?S"; nStartPos += fileAccessI.write(b,0,nRead); %DzS~5$G //if(nThreadID == 1) i"sVk8+o! // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); 3#0nus|=S } G8akMd]2 I?l*GO+pz a/`fJY6rR Utility.log("Thread " + nThreadID + " is over!"); +,c;Dff bDownOver = true; 7m@pdq5Ub //nPos = fileAccessI.write (b,0,nRead); ZNG.W0{p } .+{nfmc,c catch(Exception e){e.printStackTrace ();} Qzb8*;4?FF } UmInAH4 } stoBjDS t-_N|iW' 5 uR@\/6!@ //打印回应的头信息 9OXrz}8C public void logResponseHead(HttpURLConnection con) #r:J,D6* { 1cOp"! for(int i=1;;i++) _RY<-B
{ *C's7O{O String header=con.getHeaderFieldKey(i); B'atwgI0 if(header!=null) H\^5>ccU>V //responseHeaders.put(header,httpConnection.getHeaderField(header)); q0DoR@ Utility.log(header+" : "+con.getHeaderField(header)); tlqDY1 else @oYTJd(v{ break; 6t/})Xv } |~v($ c } ~g>15b3 M}/%t1^g: iT9cw`A^% public void splitterStop() -^\k+4; { +apIp(E+ bStop = true; sOU_j4M{ } .yg"!X otX#}} + O&d(FJZ } D1#E&4 wyAqrf [J-r*t"! /* kDO6:sjR7 **FileAccess.java ~]c^v'k *//文件访问(定位,写) :qgdn,Me package NetFox; G9Azd^3 import java.io.*; ,<pql!B- VJHHC.Kz hO{@!H$l public class FileAccessI implements Serializable{ De:w(Rm },[S 9I`p //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 \mWXr*; RandomAccessFile oSavedFile; G.B^C)guu long nPos; Yn1 U@! [.dNX )-9|3` public FileAccessI() throws IOException j]
M)i:n { TSHp.ABf this("",0); rYm<U!k } ?ADk`ts~,} y<3v/,Y Qyd3e O_ public FileAccessI(String sName,long nPos) throws IOException }1;Ie0l=_e {
4uU(t oSavedFile = new RandomAccessFile(sName,"rw"); 5:n&G[Md this.nPos = nPos; *p.ELI1IC oSavedFile.seek(nPos); >]C;sP } )2rI/=R R+!2 j ]V.9jlXF public synchronized int write(byte[] b,int nStart,int nLen) mO> [kb"V' { A=h`Z^8\B int n = -1; 9h*$P:S;1v try{ QfwGf,0p oSavedFile.write(b,nStart,nLen); E8NIH!dI n = nLen; 9iS3.LCfX } |S>nfL{TQe catch(IOException e) o/=K:5 { *jA%.F e.printStackTrace (); _}JygOew } ;y5cs;s zq1&MXR)l `I
m;@_J return n; Z$WT ~V } wQ[2yq C:
e}}8i UbQeN } BAt2m- 3_Oq4 / xYwbbFGrG /* vv%Di.V **SiteInfoBean.java G9VzVx#T# */ \19XDqf8 package NetFox; h)A+5^:^ Jw
{:1 ?0_i{BvN public class SiteInfoBean { sBSBDjk[ P<2yCovn` 1N#TL"lMS private String sSiteURL; //Site's URL 5l)p5Bb48c private String sFilePath; //Saved File's Path q{ctHs Q(9 private String sFileName; //Saved File's Name 4r5,kOFWb private int nSplitter; //Count of Splited Downloading File mX |AptND \
2".Kb@= 2d1'!B
zDA public SiteInfoBean() n\cP17dr {//nSplitter的缺省值为5 1U"Y'y2 //default value of nSplitter is 5 rx^pGVyg this("","","",5); *O 0* } pl"|NZz
7; 3:=XU9p)x _=}Y
lR public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) 9sT?"(= { Nw|Lrn*h! sSiteURL= sURL; z,]fR sFilePath = sPath; possM'vC sFileName = sName; \sRRLDj% this.nSplitter = nSpiltter; eY&UFe K7_)!=DcX T>?sPq } ;j/ur\37 I=3q#^}[ 1W/=
=+%I public String getSSiteURL() XriVHb { F48`1+ return sSiteURL; 0kCUz } FAQ:0L$G sO(K po9jq I1}{7-_t public void setSSiteURL(String value) ::M/s#-@ { YJ75dXc&& sSiteURL = value; -rH3rKtf~ } C]r$ aa".d[*1 xH'H!
8 public String getSFilePath() -Xd/-,zPY { 4Y)3<=kDG return sFilePath; ipbVQ7 } 5`z{A }RoM N$r {) .=G public void setSFilePath(String value) x]{h$yI { L g%cVSz/C sFilePath = value; wCI.jGSBW } }_gq vgI>p y'zEaL&SI@ +h9CcBd public String getSFileName() G! 87F/ { }e@j(*8 return sFileName; jf$t } zJx<]=] c}{e,t s!+?)bB public void setSFileName(String value) >?tcL * { 3~ZtAgih% sFileName = value; vG } ;N/c 5+ Y{J/Oib ^#Wf public int getNSplitter() @FbzKHdV/ { ?]7ITF return nSplitter; [S<DdTY9hZ } \dfq&oyU\ ->j9(76 " ,3Wa~\/Q public void setNSplitter(int nCount) !IGVN:E { q,*IR*B:a nSplitter = nCount; De^is^{ } H?aB8=) } 4bJ3uIP# WUHx0I nrf%/L /* .<j8>1 **Utility.java A2+t`[w */ 95H`-A package NetFox; r[?rwc^ ", |wG7N
K `b]
NB^/ public class Utility { 5Pr<%}[S^ Z6
aT%7}} iF
67 public Utility() v:vA=R2 { %V+,# K]7@%cS =T\pq8 } gF%ad=xm L@2H>Lh35 //线程睡眠 $GPA6 public static void sleep(int nSecond) ):\pD]e { 7"QcvV@p try{ qQom=x Thread.sleep(nSecond); p,4z;.s$ } 2dq{n.cgs catch(Exception e) Ti'O 2k { ;wN.RPE_^ e.printStackTrace (); 5q)Eed } YJ"gm]Pm } RSnK`N\9jb gWlmQl //日志 *in_Zt3 public static void log(String sMsg) +fwq9I>L { $@U`zy"Y System.err.println(sMsg); :J<S-d= } -meKaQv J[B8sa My[L3KTTp public static void log(int sMsg) QHQj6] { ooD/QZUE System.err.println(sMsg); d6L(Q(:s } dE^'URBiA } U{R*WB b 9S<W~# zz >a0;|;hp /* fkI<RgM **TestMethod.java w"sRK */ I|PiZ1]2Y package NetFox; 7 yi >G {66vdAu&h< :._O.O public class TestMethod { vw!i)JO8M Wm\f:|U5` s+CWyW@ public TestMethod() oZ=e/\[K { ///xx/weblogic60b2_win.exe xCQ<G{;C try{ 7f(UbO@BD SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); 56v<!L5% //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); l p? h~ SiteFileFetch fileFetch = new SiteFileFetch(bean); *$s)p > fileFetch.start(); JLeV@NO } `^6}Dn catch(Exception e){e.printStackTrace ();} ``NjNd C
:e 'wmA c"QI`;D_c } zxj!ihs< x:@e ID 5 i#B?+Y public static void main(String[] args) w
S;(u[W { ?,Hk]Rl3 new TestMethod(); PC3wzJ\\S } |M0TG } wF&\@H 点击下载更多相关资料
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