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/* 7t`<`BY^ **SiteFileFetch.java 2#&9qGR */ '"QC^Joz package NetFox; YXXUYi~!f import java.io.*; g.aNITjP import java.net.*; 9oS \{[x. bT-(lIU T_ Q/KhLU public class SiteFileFetch extends Thread { f]"][!e!, oQ~Q?o]Ri ,R0@`t1 p SiteInfoBean siteInfoBean = null; //文件信息Bean E>TD` long[] nStartPos; //开始位置 m
s\:^a long[] nEndPos; //结束位置 Q_/{TE/sO5 FileSplitterFetch[] fileSplitterFetch; //子线程对象 *2crhI*@> long nFileLength; //文件长度 >JS\H6 boolean bFirst = true; //是否第一次取文件 JGt4B boolean bStop = false; //停止标志 V`~$|
K[ File tmpFile; //文件下载的临时信息 /tA$'tZ DataOutputStream output; //输出到文件的输出流 M]!\X6<_ w<j6ln+nM //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) ;+K:^*oJ public SiteFileFetch(SiteInfoBean bean) throws IOException kac@yQD { 6}R^L(^M siteInfoBean = bean; vrn IEur //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); TveCy & tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); H? N!F7s if(tmpFile.exists ()) ]7zDdI|
{ &q1(v3cOO bFirst = false; C.@R#a' read_nPos(); z;1tJ } $=iz&{9 else UV)[a%/SB& { =Y|TShKk nStartPos = new long[bean.getNSplitter()]; U6FM`w< nEndPos = new long[bean.getNSplitter()]; l3n* b6 } l0Jpf9Aue NFY,$ KXcG;b[7n K]zBPfx } FB@c
+*1 gqNd@tYI V'pNo&O= public void run() VZYdCZ&l7 { #!h:w //获得文件长度 KJ,{w?p~
) //分割文件 <;#d*&] //实例FileSplitterFetch $y\'j5nk3 //启动FileSplitterFetch线程 g]iWD;61 //等待子线程返回 ru3nnF_I try{ s['F?GWg if(bFirst) JO5~Vj_" { ^C>i(j& nFileLength = getFileSize(); Lcplc"C if(nFileLength == -1) 9C[3w[G~C { Zp@p9][C System.err.println("File Length is not known!"); QpS0iUG } Kr=DoQ."d8 else if(nFileLength == -2) N:0/8jmmO { nk1(/~` System.err.println("File is not access!"); 9%oLv25{) } xBG&ZM4"^f else r$;DA<<|<c { HoymGU`w for(int i=0;i<nStartPos.length;i++) w |>:mQnU { ?A(=%c|,g nStartPos = (long)(i*(nFileLength/nStartPos.length)); )HS|pS: } wGd8q xa for(int i=0;i<nEndPos.length-1;i++) ({Fus@/ { "vH@b_>9| nEndPos = nStartPos[i+1];
}CaL:kY8 } +
}( nEndPos[nEndPos.length-1] = nFileLength; z|}Anc[\ } eL^,-3JA(] } x*i5g`jx ;W?e@ Lgxk 2{"Wa|o` //启动子线程 h(d<':| fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; zdyS"H} for(int i=0;i<nStartPos.length;i++) 6h}f^eJ:K, { ^qiTO`lg fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), LB? evewu siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), T'\lntN nStartPos,nEndPos,i); {4CkF\ Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); eN>=x40 fileSplitterFetch.start(); >~TLgq* } XIJ>\ RF // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), -:pLlN-f siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); itX<! // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", Mz40([{ nEndPos = " + nFileLength); D!J
("~[3 // fileSplitterFetch[nPos.length-1].start(); [rU8%
?.|qRzWL vrGRZa //等待子线程结束 @s2z/h0H //int count = 0; y M , hF //是否结束while循环 |w6:mtaS boolean breakWhile = false; azPFKg+ @]WN|K M <"&$qZ$R while(!bStop) D?qA
aq&4 {
dy,,x write_nPos(); T*J]e|aF Utility.sleep(500); $>OWGueq64 breakWhile = true; Wxb/|?, hX$k8 o0 GpN tvo~ for(int i=0;i<nStartPos.length;i++) } UHuFff, { 76}
N/C if(!fileSplitterFetch.bDownOver) 0mH>fs 4 { oO$a4|&, breakWhile = false; #`);UAf break; m$*dPje } nW{).
P } h<6@&yzp if(breakWhile) ?t'O\n)M break; CO0Nq/@ :v
Pzw! F_zs"ex/ //count++; TaG'? //if(count>4) +MGEO+ // siteStop(); +aEE(u6%E@ } vxZvK0b620 'RTz*CSZ ZR6KE_ System.err.println("文件下载结束!"); &0K
H00l } ,;O+2TX catch(Exception e){e.printStackTrace ();} 4punJg~1 } ;wp)E nF >7@F4a ,X+mXtg. //获得文件长度 j*q]-$ 2E public long getFileSize() p/cVQ { !R[o6V5T int nFileLength = -1; 6@ET3v try{ v#(wc+[ URL url = new URL(siteInfoBean.getSSiteURL()); N#6&t8;kTC HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); 2y,NT|jp httpConnection.setRequestProperty("User-Agent","NetFox"); qdL;Ii<Y0 1;4TA}'H &( b\jyf
int responseCode=httpConnection.getResponseCode(); 8D;>] > if(responseCode>=400) d;
oaG (e { 1
BAnf9
processErrorCode(responseCode); Tr(w~et return -2; //-2 represent access is error ;I:jd") } z./u;/: g.s~Ph- G o D*h@yL String sHeader; km}%7|R? J5mMx)t@ Nf}G
"! for(int i=1;;i++) ]gQgNn? { T,!?+# //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); ,-vbR& //Utility.log(in.readLine()); RoJ{
ou@cs sHeader=httpConnection.getHeaderFieldKey(i); &`Z>z T} if(sHeader!=null)
w6qx { rKg5?. if(sHeader.equals("Content-Length")) <Ktx*(D { R3jhq3F\Y nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); wx>BNlT@? break; 5WP)na6" } \6T&gX } H8mmmt6g else C^2Tql break; \.POb5]p0 } /U`"Xx } $eCxpb.. catch(IOException e){e.printStackTrace ();} {Ymn_ catch(Exception e){e.printStackTrace ();} 2Vr F~+ A]WU*GL2H Zyu4! Utility.log(nFileLength); Eii)zo8Xd KWLI7fTgj$ 7Fh%jRHZ` return nFileLength; G9 ;X=c } \{\*h /m MIsjTKE q#xoM1 //保存下载信息(文件指针位置) GASDkVoij private void write_nPos() $GSn#} yz { fx_7X15 try{ VEkv
JX. output = new DataOutputStream(new FileOutputStream(tmpFile)); quTM|>=_R output.writeInt(nStartPos.length); &
VJ+X|Z for(int i=0;i<nStartPos.length;i++) [W,Ej { i
?%;s5< // output.writeLong(nPos); d!D#:l3; output.writeLong(fileSplitterFetch.nStartPos); >KNiMW^V output.writeLong(fileSplitterFetch.nEndPos); ]t=m } LS}u6\( output.close(); 5hr$tkkL } MXh0 a@*] catch(IOException e){e.printStackTrace ();} K63OjR>H catch(Exception e){e.printStackTrace ();} &u&/t? } c/jU+,_g "iMuA [o<Rgq4 //读取保存的下载信息(文件指针位置) dzjp,c@ private void read_nPos() \'xF\V { /vYuwaWG= try{ l:-$ulAx DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); 3,8<5)ds* int nCount = input.readInt(); ]]Sz|6 P nStartPos = new long[nCount]; %?Yf!)owh nEndPos = new long[nCount]; w<!F& kQB for(int i=0;i<nStartPos.length;i++) V8@VR`!' { 4QARrG% nStartPos = input.readLong(); e4fh<0gX nEndPos = input.readLong(); 2-s ,PQno^ } 66(|3D X input.close(); i+
]3J/J } *39Y1+=)$$ catch(IOException e){e.printStackTrace ();} 3+ %a catch(Exception e){e.printStackTrace ();} S1p4.qJ } [_Fj2nb* 0Dv r:]R dY5 m) ? private void processErrorCode(int nErrorCode) ]0p]
u d& { 7hQXGY,q System.err.println("Error Code : " + nErrorCode); InBnU`(r } v6uR[18 mEeD[dMN 3k(A&]~v //停止文件下载 3q:U0&F public void siteStop() Q'5]E{1<'n { O`j1~o<{ bStop = true; Lp.dF)C\ for(int i=0;i<nStartPos.length;i++) "Rr)1x7 fileSplitterFetch.splitterStop(); w<#/ngI2 !w2J*E\ #Z#rOh } C jISU$O } $9YAq/#Q //负责部分文件的抓取 NX%"_W/W **FileSplitterFetch.java $ @g\wz */ He vZ}. package NetFox; a> qB
k}) [U'I3x, v7gs
$'Q import java.io.*; o 9\J
vJk import java.net.*; ?*cr|G$r[ v+Mi"ZAd hGh91c;4 public class FileSplitterFetch extends Thread { l7 Pn5c 2T 3tKX pse$ S= String sURL; //File URL 0Lb:N]5m8 long nStartPos; //File Snippet Start Position opsjei@ long nEndPos; //File Snippet End Position xl2;DFiYt int nThreadID; //Thread's ID %])U ( boolean bDownOver = false; //Downing is over w_qX~d/ boolean bStop = false; //Stop identical V1di#i: FileAccessI fileAccessI = null; //File Access interface o-i9 :AHs .3>`y L *ThP->&:( public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException 4FQB%3>* { *Tc lcu this.sURL = sURL; e_=TkG1E6 this.nStartPos = nStart; StLFq6BO this.nEndPos = nEnd; O{^8dwg nThreadID = id; ~H`m"4zQ fileAccessI = new FileAccessI(sName,nStartPos);//定位 i&mcM_g32 } USd7gOq( MTXh-9DA ^E~F,]dV= public void run() rf?%- X(V { T,@s.v while(nStartPos < nEndPos && !bStop) *I]/ [d { +2xgMN6B@ 9Xl[AVs:M
R*0]*\C z try{ 7<GC{/^T URL url = new URL(sURL); *!oV?N[eA' HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); HpP82X xj httpConnection.setRequestProperty("User-Agent","NetFox"); ;P
*`v String sProperty = "bytes="+nStartPos+"-"; (yrN-M4~t httpConnection.setRequestProperty("RANGE",sProperty); 1A%0y)] Utility.log(sProperty); lT^/8Z<g -.xiq0 Mc,3j~i InputStream input = httpConnection.getInputStream(); ?_ 476A //logResponseHead(httpConnection); Ef @
r)S:-wP 0:I[;Qt byte[] b = new byte[1024]; sGFvSW int nRead; H^ 'As;R while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) n)|{tb^ { V82HO{ D nStartPos += fileAccessI.write(b,0,nRead); S5o,\wT //if(nThreadID == 1) eWWqK9B.- // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); ] M`%@ps } ylm #Xa bT7+$^NHf e&nE Utility.log("Thread " + nThreadID + " is over!"); f+!k:}K bDownOver = true;
)Fgu' //nPos = fileAccessI.write (b,0,nRead); y0f:N
U } ]A%]W ^G catch(Exception e){e.printStackTrace ();} fn#qcZv? } ) >te|@}o } -w"$[XP ui
RO,B}z \&_pI2X //打印回应的头信息 po\(O8#5U public void logResponseHead(HttpURLConnection con) 2cEvsvw> { RDfvD|}VN for(int i=1;;i++) )x+P9| { j*\oK@ String header=con.getHeaderFieldKey(i); 40%fOu,u` if(header!=null) [*C%u_h //responseHeaders.put(header,httpConnection.getHeaderField(header)); WD55( Utility.log(header+" : "+con.getHeaderField(header)); /:tzSKq} else fUMjLA|*I< break; iGPrWe@. } OxQ 5P;O } &V|kv"Wwj .Hnhd/ c d.|*sZ&3p public void splitterStop() nW)?cQ
I { dGgltY bStop = true; GKc? } 7KesfH? u*f`\vs ~R&rQJJeJ } qj9[mBkP" U&i#cF Z`_x|cU?J /* R_D&"& **FileAccess.java C$p012D1 *//文件访问(定位,写) $DXO7;# package NetFox; 5tyA{&Ao import java.io.*; $K.DLqDt ZC]|s[ inY_cn? public class FileAccessI implements Serializable{ &gJ1*"$9 B(WmJ6e //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 ;>uB$8<_7 RandomAccessFile oSavedFile; ",l6-<s long nPos; !Q WNHL 7t+d+sQ-l mPU}]1*p public FileAccessI() throws IOException Zs(BViTb| { IsmZEVuC this("",0); hraR:l
D } eR4ib-nS :zX^H9'E<( A!,c@Kv
3 public FileAccessI(String sName,long nPos) throws IOException zMRa<G7 { @0]w!q oSavedFile = new RandomAccessFile(sName,"rw"); 0C;Js\>3] this.nPos = nPos; 8 :WN@ oSavedFile.seek(nPos); h/oun2C } Fv7]1EO. [n2zdiiBd Qo:vAv public synchronized int write(byte[] b,int nStart,int nLen) fF(AvMsO { (/2rj[F& int n = -1; t{>#)5Pqv try{ \6 1H(, oSavedFile.write(b,nStart,nLen); )!kt9lK n = nLen; tA^+RO4 } T$`m!mQ4 catch(IOException e) o{>4PZ}=g { X1d{7H8A2 e.printStackTrace (); 5kGQf } w[F})u]E 8nng^ =/}Rnl+c return n; !uit } JNY ?]|= tmOy"mq67 *xJ ]e. } `v@Z|rv, X&HYWH'@, -. o,bg /* Rz&`L8Bz **SiteInfoBean.java Zr1"'+- */ (u^8=# package NetFox; r&Nh>6<&/ YO-B|f e,{k!BXU#' public class SiteInfoBean { ysZ(*K
n(? q_6lD~~q^ sZ~03QvkT private String sSiteURL; //Site's URL |||m5(`S private String sFilePath; //Saved File's Path L*dGo,oN private String sFileName; //Saved File's Name a_bZT4 private int nSplitter; //Count of Splited Downloading File 7TEpjSuF @`)>-k gm
pY[ public SiteInfoBean() `*[\b9> {//nSplitter的缺省值为5 Y#I8gzv //default value of nSplitter is 5 yZ{N$ch5b this("","","",5); O:8
u^TP } S !#5 hxj\ b+q'xnA=> public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) M*bsA/Z { vs$h&o>| sSiteURL= sURL; Qy"%%keV'T sFilePath = sPath; :-#7j}
R& sFileName = sName; GApvRR+Z this.nSplitter = nSpiltter; %TR J Q|P
M6ta W!T[
^+ } ks sRwe%>; VRgckh
m ViyG%Sm public String getSSiteURL() x0>N{ADXQ { /s%-c!o^ return sSiteURL; y`8U0TE3R } WV'u}-v^ 7[='m{{=C :R
+BC2x public void setSSiteURL(String value) </
"Wh4>C { 'v^shGI%Ht sSiteURL = value; x^c,cV+* } }"nm3\Df k&:q|[N ZvQZD=,F public String getSFilePath() uH?4d!G { 5#x[rr{^* return sFilePath; KztQT9kY } `KLr!<i() -hfkF+=U' %scIZCrI~ public void setSFilePath(String value) A@?-"=h} { -6WSYpHV sFilePath = value; i;/;zG^=_ } UroC8Tm =bP<cC=3b Im-qGB0C public String getSFileName() K:qc
"Q=C { b@=H$" return sFileName; Vv5T(~ } kI04<! %Jd!x{a`>A ~ArRD-_t public void setSFileName(String value) ^~TE$i< { R>~I8k9mM sFileName = value; ~.J*_0~Ze } vfj{j=
G 8"NPj0 {/N8[?zML public int getNSplitter() ~*\ *8U@7 { @*L-lx return nSplitter; eJn_gKWb } K?e16; [~cz|C# K0o${%'@7 public void setNSplitter(int nCount) wpC.!T { C8qSoO4Z nSplitter = nCount; MQcIH2 } uTz>I'f } {*g{9` {,6J*v"o P_mP ^L /* `-cw[@uD **Utility.java x[)]u8^A */ 9An\uH)mL package NetFox; U6wy^!_X9 ]Lg~I#/# H/ Ql public class Utility { Y%y
B<Cg_C 2'OY,Ooe public Utility() @qW$un: { 7I]?:%8h 1 |)CQ l O* } tQxxm=> $_eJ@L# //线程睡眠 S=`$w public static void sleep(int nSecond) GcA|JS=> { wL]#]DiE try{ ob9od5Rf Thread.sleep(nSecond); ,afO\oe>MG } @ZJ}lED3 catch(Exception e) |=~mRqG { lfd-!(tXD e.printStackTrace ();
JV4fL~ } #h9Gl@| } t;PG 8'qlg|{!~ //日志 j"pyK@v2B public static void log(String sMsg) 5! +{JTXa { n)D System.err.println(sMsg); 3QVUWhJ }
+O8zVWr u#y)+A2&! T*C
F5S public static void log(int sMsg) Z!fbc#L6
{ =|empv# System.err.println(sMsg); #)48dW!n } *wd=&Z^19 } L*|P' }.WO=IZ Uugq.'> /* R^$EnrY(< **TestMethod.java =b1
y*? */ X&rsWk package NetFox; |yp^T )Spa
F)N8 D^p)`* public class TestMethod { *>Bew PQYJnx} WD[jEWMV7D public TestMethod() luac { ///xx/weblogic60b2_win.exe |f1^&97=+ try{ 2>9..c SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); r~oUln<[ //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); 6CGk*s SiteFileFetch fileFetch = new SiteFileFetch(bean); 3fZoF`<a fileFetch.start(); S5Pn6'w } y@2"[fo3~ catch(Exception e){e.printStackTrace ();} %1{O +;pw^QB q@VIFmqY! } E[zq<&P@ saQo]6# &t_TLV 8T public static void main(String[] args) e} 7!A { =;)=,+V~q new TestMethod(); Buq(L6P9r } E KN<KnU% } K&gE4;> 点击下载更多相关资料
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