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/* qd#?8 **SiteFileFetch.java ntbl0Sk */ q`z/ S> package NetFox; F8M&.TE_3 import java.io.*;
WV&T import java.net.*; r_nB-\ e5G)83[= &5puGnTZ public class SiteFileFetch extends Thread { eqbQ,, & P8!ON= -V0_%Smc SiteInfoBean siteInfoBean = null; //文件信息Bean eygmh aE long[] nStartPos; //开始位置 u(l[~r>8W; long[] nEndPos; //结束位置 /a.4atb0 FileSplitterFetch[] fileSplitterFetch; //子线程对象 ITJ{]7N long nFileLength; //文件长度 K
;\~otR^ boolean bFirst = true; //是否第一次取文件 A>WMPe:sSS boolean bStop = false; //停止标志 O O?e8OU File tmpFile; //文件下载的临时信息 m ;-FP 2~ DataOutputStream output; //输出到文件的输出流 MCOiB<L6 zQ3m@x //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) ]&6# {I- public SiteFileFetch(SiteInfoBean bean) throws IOException S:)Aj6>6 { >qj.!npQD siteInfoBean = bean; G165grGFd //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); 0_'(w;!wq: tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); wZ6D\I if(tmpFile.exists ()) 4x7(50hp# { HVO
mM17 bFirst = false; Uytq,3Gj6 read_nPos(); MMlryn||1 } oSVo~F else !5,>[^y3 { hRAI7xk nStartPos = new long[bean.getNSplitter()]; t8X$M;$ nEndPos = new long[bean.getNSplitter()]; ;pe1tp } N(i%Oxp1 EdGA#i3 ?bFP'. (NfP2E|B } l{b<rUh5W +;z^qn :QKxpHi public void run() :"m~tU3& { e7e6b-"_2 //获得文件长度 WgHl.
:R //分割文件 d4ANh+}X"_ //实例FileSplitterFetch @ig'CF%( //启动FileSplitterFetch线程 _N8Tu~lqV //等待子线程返回 0IZaf%zYc try{ L8OW@)| if(bFirst) t][U`1>i { VnlgX\$} nFileLength = getFileSize(); L{`S^'P< if(nFileLength == -1) /V'^$enK!} { :`u?pc27Sm System.err.println("File Length is not known!"); 8yW 8F26 } Y~I$goT else if(nFileLength == -2) 5zk<s`h { ed3d 6/%HR System.err.println("File is not access!"); Skb,cKU } /#mq*kNIM6 else H CBZ*Z- { 'iQ for(int i=0;i<nStartPos.length;i++) EY~b,MIL4 { `As|MYv nStartPos = (long)(i*(nFileLength/nStartPos.length)); ?yAp&Ad } lKVy{X3]* for(int i=0;i<nEndPos.length-1;i++) nsT]Yxo%M { '8%pEl^ nEndPos = nStartPos[i+1]; JA]TO(x } TtZZjeg+V nEndPos[nEndPos.length-1] = nFileLength; '5^$v{ } mM`zA%= } 0[A4k: \R"} =7 {?2jvv //启动子线程 4)]w"z0Pc fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; +f5|qbX/\ for(int i=0;i<nStartPos.length;i++) $? 'JePC { Mn)>G36( fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), @B.;V=8wJ siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), 8PN/*Sa nStartPos,nEndPos,i); |aAu4 Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); :ik$@5wp fileSplitterFetch.start(); 3HtLD5%Q } aJ!(c}N~97 // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), Drn{ucIs siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); b*;zdGX.A9 // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", 8}B*a;d nEndPos = " + nFileLength); ;N+
v x // fileSplitterFetch[nPos.length-1].start(); w)Rtt 9 Vki'pAN JpI(Vcd //等待子线程结束 1/ZvcdYB //int count = 0; F'v3caE //是否结束while循环 C(=$0FIR boolean breakWhile = false; O?p8Gjf t Ye+7s '
91-\en0 while(!bStop) '7'*+sgi$ { D]n"`< Ho write_nPos(); P4\{be>e Utility.sleep(500); \hlQu{q. breakWhile = true; %NyV2W=~X sl5y1W/]] 9EPE.+ns for(int i=0;i<nStartPos.length;i++) 0XkLWl|k { ]q,5'[=~4h if(!fileSplitterFetch.bDownOver) %VV\biO] { 2s^9q9NS" breakWhile = false; t:NYsL break; >AtW } a&sVcsX } ^)JUl!5j]C if(breakWhile) :,<G6"i break; u~uR:E%'C |b
BA0.yS # //count++; ]+U:8* //if(count>4) )aV\=a |A // siteStop(); NmH1*w<A } G}2DZ=&>' 8!R +wy /~8<;N>,+ System.err.println("文件下载结束!"); d`XC._%^J } {6y@;Fd catch(Exception e){e.printStackTrace ();} IInsq } 9_$i.@L1 +qWrm|O] (Xak;Xum1 //获得文件长度 Zb \E!>V public long getFileSize() m
L#%H( { zL^`r)H int nFileLength = -1; 8C[W;&Y= try{ 6~oo.6bA URL url = new URL(siteInfoBean.getSSiteURL()); mY)Y47iL HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); =&!L&M<< httpConnection.setRequestProperty("User-Agent","NetFox"); _,"?R]MO (plsL
vp[;rDsIJ$ int responseCode=httpConnection.getResponseCode(); We8n20wf< if(responseCode>=400) a?d)lnk { |vGb,&3 processErrorCode(responseCode); O<*l"fw3 return -2; //-2 represent access is error tx+KxOt9Y } EMTAl;P %8L>|QOX 6Mh;ld@ String sHeader;
Y , wU"0@^k]< }k{h^!fV for(int i=1;;i++) o 94]:$=~ { Q#h*C
ZT //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); ycD}7 //Utility.log(in.readLine()); z#j)uD sHeader=httpConnection.getHeaderFieldKey(i); $-=QT X if(sHeader!=null) QE#Ar8tU { *GGiSt if(sHeader.equals("Content-Length")) mY'c<>6t { cn3F3@_"\ nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); rw|;?a0 break; id" -eMwp } NCXr$ES{ } TV['"'D&i else 4PcsU HR break; fOHgz,x= } 0DZ}8"2 } MS=zG53y catch(IOException e){e.printStackTrace ();} Y30T>5 catch(Exception e){e.printStackTrace ();} d%EUr9~? eM) I% y-1!@|l0:6 Utility.log(nFileLength); ^p}S5, C&1()U Ch;wvoy return nFileLength; h{5K9$9= } ^W*T~V*8 1FPt%{s3 C3hQT8~ //保存下载信息(文件指针位置) l_MF9.z& private void write_nPos() 45qSt2 { Nr(t5TP^ try{ Rn4Bl8z'> output = new DataOutputStream(new FileOutputStream(tmpFile)); 2BGS$$pP output.writeInt(nStartPos.length); jfOqE*frl! for(int i=0;i<nStartPos.length;i++) PL}c1Ud { <aPbKDF~V // output.writeLong(nPos); N}/|B} output.writeLong(fileSplitterFetch.nStartPos); RP9jZRDbZ output.writeLong(fileSplitterFetch.nEndPos); oR1HJ2>Z1 } Z+%w|Sx output.close(); K!cLEG!G } ;dR4a@ catch(IOException e){e.printStackTrace ();} li +MnLt catch(Exception e){e.printStackTrace ();} iL6Yk @ } 3%0ShMFP@ q-lejVS(g <|kS`y //读取保存的下载信息(文件指针位置) V:Lq>rs#
private void read_nPos() \$B%TY { |RS(QU<QE try{ p7{%0 DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); L#>^R int nCount = input.readInt(); |}07tUq nStartPos = new long[nCount]; !VoAN5#; nEndPos = new long[nCount]; 5X1z^( for(int i=0;i<nStartPos.length;i++) v|K'M,E { `Jv~.EF% nStartPos = input.readLong(); K
K_ nEndPos = input.readLong(); ^K]`ZQjKC } +;|" # input.close(); uA]!y{"}J
} ~5@bWJ catch(IOException e){e.printStackTrace ();} 0g{`Qd catch(Exception e){e.printStackTrace ();} Gkr?M^@K } cmu| d H-g
CY|W 9ZVzIv( private void processErrorCode(int nErrorCode) xRp;y* {
PZ[hH(EX System.err.println("Error Code : " + nErrorCode); ">|G^@|:A } 5%#V>|@e#
oa;vLX$ gbvMS*KQz //停止文件下载 g[%^OT# public void siteStop() DN 0`vl{* { Wq"5-U;:w bStop = true; CEXD0+\q for(int i=0;i<nStartPos.length;i++) "+sl(A3`U fileSplitterFetch.splitterStop(); :+?w> ,3P@5Ef d [f,Nu' } "IuHSjP } *2^+QKDG //负责部分文件的抓取 Po*G/RKu4W **FileSplitterFetch.java qdQQt5Y'm */ AQU^7O package NetFox; PO@b9O L}hc|(: BTAt9Z8qK import java.io.*; l+XTn;cS import java.net.*; /73ANQ" jV 982Y Pu0 <Clh public class FileSplitterFetch extends Thread { J-U5_>S K*sav?c !3;KC"o String sURL; //File URL W&Xm_T[Q long nStartPos; //File Snippet Start Position +zL|j/q ? long nEndPos; //File Snippet End Position DOB#PI[/ int nThreadID; //Thread's ID (`)ZR%i boolean bDownOver = false; //Downing is over ;k fl5 boolean bStop = false; //Stop identical M$$Lsb [ FileAccessI fileAccessI = null; //File Access interface m/bP`-/, h#~\-j9> $VNj0i. Pr public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException U.A:'9K, { 6^VPRp this.sURL = sURL; ~m6b6Aj@6 this.nStartPos = nStart; !4vepa}Y this.nEndPos = nEnd; 2kkqPBc_
nThreadID = id; `)TuZP_) fileAccessI = new FileAccessI(sName,nStartPos);//定位 ]rS:#LK } vT{+Z\LL= &\m=|S FByA4VxB public void run() <X"_S'O { 8Xx4W^*_ while(nStartPos < nEndPos && !bStop) H#:Aby-d} { ^|UD&6 dx =OamN7V= S.R|Bwj}(Y try{ wB+X@AA URL url = new URL(sURL); xRbtiFk9H HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); l>*L
Am5 httpConnection.setRequestProperty("User-Agent","NetFox"); dGG 8k& String sProperty = "bytes="+nStartPos+"-"; SQ
la]% httpConnection.setRequestProperty("RANGE",sProperty); |
{Tq/ Utility.log(sProperty); V:
n\skM P^^WViVX ^^T
xx InputStream input = httpConnection.getInputStream(); jT*?Z:U //logResponseHead(httpConnection); Y6RbRcJw :6jh*,OHZl &a!MT^anA~ byte[] b = new byte[1024]; :YCB23368" int nRead; E RjMe'q4 while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) :$Xvq-#$| { S0w:R:q}L nStartPos += fileAccessI.write(b,0,nRead); g+]o=@ //if(nThreadID == 1) qGdoRrp0Ov // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); ST1c`0e } '0<9+A# 1O2jvt7M !W/"Z!k Utility.log("Thread " + nThreadID + " is over!"); V*gh"gZ< bDownOver = true; a: 2ezxP //nPos = fileAccessI.write (b,0,nRead); pEq }b+- } Jd28/X5& catch(Exception e){e.printStackTrace ();} uc
Ph*M } zALtG<_t } |f3 :9(p IG90mpLX G=PX'dS //打印回应的头信息 tt A'RJ public void logResponseHead(HttpURLConnection con) ?T)M z
q} { s)G?5Gz for(int i=1;;i++) IL{tm0$r { C."\ a_p String header=con.getHeaderFieldKey(i); +!mEP> if(header!=null) AP+%T
//responseHeaders.put(header,httpConnection.getHeaderField(header)); dWP<,Z> Utility.log(header+" : "+con.getHeaderField(header)); .l$U:d else 20/P:; break; o>HU4O} } *iVEO } L&0aS: =wlPm5 "KgNMNep public void splitterStop() *tfD^nctO { ~\+Bb8+hpJ bStop = true; JHa\"h } U(2=fKK; %+oqAYm+s ?5;N=\GQ } sGx3O i aKintb}n gxmY^"Jy /* XTRF IY **FileAccess.java 9.B gsV . *//文件访问(定位,写) .'NTy
R package NetFox; e~geBlLar import java.io.*; G5ShheZd Qna*K7kv mbns%%GJU public class FileAccessI implements Serializable{ f)mOeD*u| _9'hmej //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 QH_Ds,oH= RandomAccessFile oSavedFile; 10xza=a long nPos; )iid9K<HB r7FJqd c
Qe3 public FileAccessI() throws IOException ]Y@_ 2` { fL*+[v4 this("",0); 7Ah } ^7yaMB! Z5
7.+z< }rUAYr~V Z public FileAccessI(String sName,long nPos) throws IOException Tv6y+l { _-rC]iQJ55 oSavedFile = new RandomAccessFile(sName,"rw"); hM[3l1o{| this.nPos = nPos; r&IDTS# oSavedFile.seek(nPos); nw_s: } 5~ZzQG aKE`nA0\B Z}{]/=h public synchronized int write(byte[] b,int nStart,int nLen) qHT73_R { ;WAa4r> int n = -1; EM`'=<)V try{ s6r(\L_Im oSavedFile.write(b,nStart,nLen); sWB@'P:x n = nLen; .FV^hrJxI; } sVGQSJJ5 catch(IOException e) 0
/9 C=v { *Mb'y d/| e.printStackTrace (); @4MQ021( } 9Ofls9]U ><S(n#EB Y]5spqG return n; G:y+yE4 } ,fqM>Q 9gglyoZ% tCm]1ZgRW } y0ObcP.MA z'Z[mrLq &,=FPlTC= /* fFYoZ/\ **SiteInfoBean.java 74N3wi5B */ Dv
L8}dz package NetFox; "RM\<)IF FD&^nJ_{ z@w}+fYO public class SiteInfoBean { #ti%hm l5~O}`gfh 4=EA3`l private String sSiteURL; //Site's URL G
"!v)o private String sFilePath; //Saved File's Path $d!Vx m private String sFileName; //Saved File's Name m(d|TwG{ private int nSplitter; //Count of Splited Downloading File (CgvI*O wW/q#kc c8Ud<M . public SiteInfoBean() Lq1?Y
{//nSplitter的缺省值为5 pPag@L //default value of nSplitter is 5 uv<_.Jq] this("","","",5); f8aY6o"i } Hb::;[bm: 2ZEGE+0 R&&&RI3{ public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) A<"<DDy { \v5;t9uBZ sSiteURL= sURL; &"I csxG sFilePath = sPath; +4Pes sFileName = sName; )p1~Jx( \ this.nSplitter = nSpiltter; W3d+t?28 #.[eZ[ EApbaS}Up } (Nk[ys}%* J 7 G-qF\ OXbShA&1 public String getSSiteURL() u%+k\/Scp. { o kA< return sSiteURL; vJ=Q{_D=\ } FMI1[|:; noL9@It0 o|xZ?#^h public void setSSiteURL(String value) FKz5,PeL { ;RX u}pd sSiteURL = value; `]XI Q\ * } ' h<( R3l{.{3p2 ~6@`;s`[Y public String getSFilePath() uC#@qpzy { q~[sKAh return sFilePath; Z+J4q9^$ } (.V),NKG i,a"5DR8 X~c?C-fV public void setSFilePath(String value) H~nZ=`P9& { C !Srv7 sFilePath = value; <Nqbp }
w:QO@ ;l0dx$w :op_J!; public String getSFileName() _`&l46 { ]VLseF return sFileName; O^row1D_ } j]<K%lwp %kV7 <:y Yg3nT:K_Y& public void setSFileName(String value) @x+2b0 b { ]2qKc sFileName = value; C`ky= } qrw ]4en|Aq ]kTxVe public int getNSplitter() Wu/#}Bw# { A8*zB=C return nSplitter; -|uoxj> } R=LiB+p o!":mJy 60u_,@rV public void setNSplitter(int nCount) o25rKC=o { iI";m0Ny nSplitter = nCount; .E}lAd.Mn } ?V^7`3F } 3yKmuu! pLtw|S'4 mL48L57Z /* zZ8 *a\ **Utility.java "O4A&PJD */ tj[E!
package NetFox; wqF?o 3^+D,)#D^ ;x/eb g
public class Utility { ()?83Xj[c K8_v5 R/ZScOW[ public Utility() ggx_h { "U-jZ5o" 3>aEP5 nJ2x;';lA } ?Z7QD8N
LD}~] //线程睡眠 Zob/H+] public static void sleep(int nSecond) *c94'T cl { SscB&{f try{ Km8aHc]O~ Thread.sleep(nSecond); `Zm6e!dH- } vyIH<@@p7 catch(Exception e) !B}9gT { 73D<wMgZF e.printStackTrace (); dWvVK("Wj } -{xk&EB^$5 } y(p_Unm VWvSt C //日志 J{1H$[W~} public static void log(String sMsg) \:WWrY8& { 0
Uropam System.err.println(sMsg); 'j6O2=1 } $ s/E}X kO}&Oi,? -Lh7!d public static void log(int sMsg) TJO$r6& { tX{yR'Qhu System.err.println(sMsg); 9Ux( } 6:7[>|okQ } 3 !@ lD/9:@q\V k2U*dn"9U /* !mmMAsd, **TestMethod.java ,yYcjs!=o */ FPDTw8" B; package NetFox; aixX/se lir=0oq< Rm} ym9 public class TestMethod { >.iF,[.[F< Wh)D_ 2s\ClT public TestMethod() @%]A,\ { ///xx/weblogic60b2_win.exe #Vq9 =Q2 try{ Yq+1kA SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); Lnr9*dm6q //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); NBYJ'nA%;f SiteFileFetch fileFetch = new SiteFileFetch(bean); 2?JV "O= fileFetch.start(); 5X) 8Nwbc } }e?H(nZS7h catch(Exception e){e.printStackTrace ();} ?h= n5}Y Ax;[ Em?I 6>a6;[ } ,&P
4%N" z0[XI 7KK 3e_tT8 public static void main(String[] args) UerbNz| { k?+ 7%A] new TestMethod(); [n2B6Px } N~v6K}`} } uE-(^u 点击下载更多相关资料
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