-
UID:2537
-
- 注册时间2006-05-09
- 最后登录2020-05-29
- 在线时间3小时
-
- 发帖8
- 搜Ta的帖子
- 精华
0
- 铜板1641
- 人品值95
- 贡献值0
- 交易币0
- 好评度8
- 信誉值0
- 金币0
-
访问TA的空间加好友用道具
- 发帖
- 8
- 铜板
- 1641
- 人品值
- 95
- 贡献值
- 0
- 交易币
- 0
- 好评度
- 8
- 信誉值
- 0
- 金币
- 0
- 所在楼道
|
/* hLb;5u&!kW **SiteFileFetch.java aO8ch */ ]y3pE}R package NetFox; #TMm#?lC import java.io.*; 9=t#5J#O import java.net.*; ,CJAzGBS 4. 1rJa [YC=d1F5 public class SiteFileFetch extends Thread { qbS'|--wH &/Eg2 Lw*;tL<, SiteInfoBean siteInfoBean = null; //文件信息Bean 9[cp7 Rcb long[] nStartPos; //开始位置 uYFMv=>j long[] nEndPos; //结束位置 %1Bn_ FileSplitterFetch[] fileSplitterFetch; //子线程对象 [Q4_WKI0T long nFileLength; //文件长度 wYZT D*A2h boolean bFirst = true; //是否第一次取文件 C=fsJ=a5; boolean bStop = false; //停止标志 LnP3z5d( File tmpFile; //文件下载的临时信息 FH)t:!# DataOutputStream output; //输出到文件的输出流 CzYGq ;wJ~ha C //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) $o]r]#B+ public SiteFileFetch(SiteInfoBean bean) throws IOException :w@F?:C { ^vJ"-{ siteInfoBean = bean; 7OB%A& //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); v# tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info");
}10\K if(tmpFile.exists ()) ,Pn-ZF { (2UW_l bFirst = false; 4L8z>9D read_nPos();
mDE'<c`b4 } "r
u]?{v else EQ4#fAM) { 'eDJ@4Xm nStartPos = new long[bean.getNSplitter()]; 9]"S:{KSCn nEndPos = new long[bean.getNSplitter()]; ac9qj } M70c{s`w5 94\t1fE vt//)*(.$ ujU=JlJ7dl } K&*iw` z9[[C^C [+;qWfs B public void run() {@?G 9UypA { #Mh{<gk%ax //获得文件长度 X*i/A<Y`= //分割文件 / /'Tck //实例FileSplitterFetch dd]?9 //启动FileSplitterFetch线程 {jjSJIV1 //等待子线程返回 >*I N try{ rah,dVE] if(bFirst) 7W"/N#G { x<)G( Xe* nFileLength = getFileSize(); }^9]jSq5 if(nFileLength == -1) l71gf.4g { BT]ua]T+ System.err.println("File Length is not known!"); 0o;O`/x } !=3Rg-'d1 else if(nFileLength == -2) Guh%eR'Wt { rz6uDJ" System.err.println("File is not access!"); {@gAv! } \#CM
<% else &uv0G'"\ { U[R@x` for(int i=0;i<nStartPos.length;i++) 2R]&v;A { J{`eLmTu nStartPos = (long)(i*(nFileLength/nStartPos.length)); Z`Pd2VRp } 6SVqRD<` for(int i=0;i<nEndPos.length-1;i++) j Fma|y { EM@;3.IO nEndPos = nStartPos[i+1]; ibJHU@l } 2#3^skj nEndPos[nEndPos.length-1] = nFileLength; v!H:^!z } #Z\O}< } Cp#)wxi6[y FXV`9uq}Z $J.T$0pFa //启动子线程 nU(DYHc+l fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; I^D0<lHl~ for(int i=0;i<nStartPos.length;i++) M`vyTuO3SO { d t_e fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), m
41t(i siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), 'Hw4j:pS nStartPos,nEndPos,i); nBN&.+3t Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); q@n^ZzTx fileSplitterFetch.start(); AVG>_$< } `2`fiKm // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), +Ng0WS_0 siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); ahJ1n< // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", B<7/,d' nEndPos = " + nFileLength); =oX>Ph+ P // fileSplitterFetch[nPos.length-1].start(); >E:<E'L eWvo,4 @m~RtC-Q //等待子线程结束 ?7jg(`Yh //int count = 0; !"Q}R p //是否结束while循环 _n"Ae?TP boolean breakWhile = false; &.Q8Mi
aT ymWgf6r< fQ+\;iAU while(!bStop) cX:HD+wO { u=r`t(Z1H write_nPos(); [I l~K Utility.sleep(500); -kp swP breakWhile = true; ""{|3XJe )zq.4 y{d^?(- for(int i=0;i<nStartPos.length;i++) ,Q/Ac{C { W2Luz;(U if(!fileSplitterFetch.bDownOver) G^wtE90 { @ {#mpDX breakWhile = false; V-!"%fO.s break; Kmz7c| } 4 =Gph } uS+k^
# if(breakWhile) l&$$w!n0w break; T[?6[,. PUdM[-zjh ;n6b%,s //count++; -x`G2i //if(count>4) 1mH%H*# // siteStop(); R}:KE&tq } uj|BQ`k ~u87H? a%BeqSZh System.err.println("文件下载结束!"); -n5
B)uw= } wGsRS[ catch(Exception e){e.printStackTrace ();} Z5(enTy- } nkDy!"K |3hY6aty {g6Qv- //获得文件长度 ;AJTytE>% public long getFileSize() Ucdj4[/,h { T]T;$ int nFileLength = -1; >dzsQ^Nj try{ E7zm{BX] URL url = new URL(siteInfoBean.getSSiteURL()); (08I HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); ,#]t$mzbQ( httpConnection.setRequestProperty("User-Agent","NetFox"); x3pND ?7MqeR4/E =Gk/k}1 int responseCode=httpConnection.getResponseCode(); \5)h tL1F if(responseCode>=400) :_kAl? eJ { J;$N{"M processErrorCode(responseCode); ,`A?!.K$ return -2; //-2 represent access is error "
=]
-%B } *&Lq!rFS Cx_Q :6T p4K.NdUH String sHeader; o4b~4h{% ]aryV?!6 zTbVp8\pI for(int i=1;;i++) C0*@0~8$9 { 6t'l(E + //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); f~{}zGTM: //Utility.log(in.readLine()); {yA$V0`N{ sHeader=httpConnection.getHeaderFieldKey(i); Q&'}BeUbm if(sHeader!=null) X+k}2HvNG { 8ho[I] if(sHeader.equals("Content-Length")) qU6nJi+-I { US [dkbKo nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); Gfp1mev break; +;}#B~: } L I >(RMv } JPn$FQD else k>jbcSY(z< break; W5L iXM } $_H` } I zbU)ud catch(IOException e){e.printStackTrace ();} eM7Bc4V catch(Exception e){e.printStackTrace ();} `#-P[q<v- fFvF\ CzCQFqXI Utility.log(nFileLength); 6]zd.W =qy=-j] wCf~O'XLw return nFileLength; {O<l[|Ip } r7]zQIE c#IYFTz }N0Qm[R //保存下载信息(文件指针位置) PQKaqv}N private void write_nPos() Cxod[$8 { K$K^=>I"o try{ @H>@[+S# output = new DataOutputStream(new FileOutputStream(tmpFile)); K_?W\Yg output.writeInt(nStartPos.length); >odbOi+X for(int i=0;i<nStartPos.length;i++) me6OPc;:! { cRd0S*QN2 // output.writeLong(nPos); ps
.]N
output.writeLong(fileSplitterFetch.nStartPos); 'J&f%kx" output.writeLong(fileSplitterFetch.nEndPos); v[plT2"s } :0)3K7Q output.close(); {j5e9pg1L| } cKb)VG^ catch(IOException e){e.printStackTrace ();} ]u l$* catch(Exception e){e.printStackTrace ();} x_Jwd^`t! } R" )bDy? %CUGm$nH 'I;!pUfVp //读取保存的下载信息(文件指针位置) ;w|b0V6 private void read_nPos() ]lw|pvtd { Hn>B!Bm* try{ rqPFU6 DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); 7QKr_ int nCount = input.readInt(); K{b(J
Nd nStartPos = new long[nCount]; &[NG]V!Oc nEndPos = new long[nCount]; 8t@p@Td| for(int i=0;i<nStartPos.length;i++) ZCKka0* { bl_H4 nStartPos = input.readLong(); cLPkK3O\= nEndPos = input.readLong(); K7Rpr.p } >9RD_QG7 input.close(); bY}eUL2i4 } 'XY`(3q catch(IOException e){e.printStackTrace ();} YEkh3FrbwH catch(Exception e){e.printStackTrace ();} .<tquswg } W^3uEm&l!) 322jR4QGr ]EwVpvTw private void processErrorCode(int nErrorCode) r]3'74j: { JpsPNa System.err.println("Error Code : " + nErrorCode); O+}qQNe< } _k8A$s<d ebPgYxVZR J!'@ Bd //停止文件下载 yV_4?nh public void siteStop() AU-n&uX { "qc6=:y} bStop = true; d*)CT?d& for(int i=0;i<nStartPos.length;i++) nhIa175' fileSplitterFetch.splitterStop(); kJWN. %dQxJMwj +f*OliMD } 5~mh'<: } Z2im@c67{ //负责部分文件的抓取 ,`ZYvF^% **FileSplitterFetch.java +)2s-A f- */ ^Y-]*8;] package NetFox; T\w?$ s kP/M<X" v1a6?- import java.io.*; asY[8r?U import java.net.*; \(t@1]&jw 0b4R CR6R?R3b public class FileSplitterFetch extends Thread { /dv<qp el:9 wq vjjSKP6B String sURL; //File URL ,+~rd4a long nStartPos; //File Snippet Start Position pb#?l6x$+ long nEndPos; //File Snippet End Position r5!/[_l int nThreadID; //Thread's ID }$bF
5& boolean bDownOver = false; //Downing is over <dW]\h?) boolean bStop = false; //Stop identical %W@v2 FileAccessI fileAccessI = null; //File Access interface wywQ<n Vp>|hj po Oft4-4$E public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException sP^R/z|Y { E;<l(.Ar this.sURL = sURL;
ox+ 3U this.nStartPos = nStart; <7-J0btV this.nEndPos = nEnd; 0P\$2lk nThreadID = id;
Z*-g[8FO fileAccessI = new FileAccessI(sName,nStartPos);//定位 S[7WW$lF } TDd{.8qf 6xD#? s}N#n( public void run() *
S=\l@EW { &3yD_P_3 while(nStartPos < nEndPos && !bStop) %/9
EORdeH { kWdi595 IpP~Uz qhT@;W/X try{ 7O,U?p URL url = new URL(sURL); !9xp cQ> HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); ~ o1x;Y6 httpConnection.setRequestProperty("User-Agent","NetFox"); i\W/C String sProperty = "bytes="+nStartPos+"-"; ` AY_2>7 httpConnection.setRequestProperty("RANGE",sProperty); -eX5z Utility.log(sProperty); C+|b1/N- T0&f8 y#XbJuN/ InputStream input = httpConnection.getInputStream(); }#X8@ //logResponseHead(httpConnection); It{ ;SKeo A^p[52` |g==" byte[] b = new byte[1024]; qL,tYJ<m% int nRead; Y5F]:gs@ while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) :]J Ye* { sP ls
zC[ nStartPos += fileAccessI.write(b,0,nRead); +|tC'gCnV //if(nThreadID == 1) N 5 $c]E // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); }[M`uZ } :UQTEdc{ RIIitgV_ nxr!`^Mne Utility.log("Thread " + nThreadID + " is over!"); ATR!7i\| bDownOver = true; +wkjS r`e //nPos = fileAccessI.write (b,0,nRead); +zy=50, } /{|fyKo\? catch(Exception e){e.printStackTrace ();} F$[ U|%* } o`Ta("9^ } rD*sl} .w]GWL XP@1~$ //打印回应的头信息
8stwg' public void logResponseHead(HttpURLConnection con) =9j8cC5y { F+@5C:<? for(int i=1;;i++) t*?0D\b
2 { %JLk$sP9y` String header=con.getHeaderFieldKey(i); yrR1[aT if(header!=null) !%c'$f/ //responseHeaders.put(header,httpConnection.getHeaderField(header)); .-<k>9S7_ Utility.log(header+" : "+con.getHeaderField(header)); IKi5 v~bE else B9wPU1 break; 8cA~R- } X=>=5' } {RF-sqce &B|D;|7H zD<or&6 public void splitterStop() $]8h $ { $jg*pmR- bStop = true; ;INW`b~ } AZmb!}m+d O9r>E3-q SCz(5[MZJ } 2Y7)WPn +=:#wzK@ #
0Lf<NZ /* ;s52{>&F] **FileAccess.java 9k 6r_G" *//文件访问(定位,写) ^.>jGI%rB package NetFox; i@4~.iZ8 import java.io.*; ?2oHZ%G E<c9#I= Pcw6!xH public class FileAccessI implements Serializable{ LGl2$#x A*um{E+ //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 kS!viJwtT RandomAccessFile oSavedFile; LA`*_|}qcR long nPos; ak;*W Ovj^IjG-` 4)("v-p public FileAccessI() throws IOException !=N"vD* { fXc m|U,ho this("",0); Lliqj1& } N"3b{Qio B`
k\ EL' HB7;0yt`: public FileAccessI(String sName,long nPos) throws IOException 1n@8Kv { PnoPbk[< oSavedFile = new RandomAccessFile(sName,"rw"); Yc'kvj)_M this.nPos = nPos; yfm^?G|sW oSavedFile.seek(nPos); n-%s8aaVf } APO>y &0`)
Q {>F7CT'G6 public synchronized int write(byte[] b,int nStart,int nLen) ^g`&7tX { %wSj%>&-R int n = -1; cra+T+|>Kc try{ U\R}`l oSavedFile.write(b,nStart,nLen); kP?KXT3y n = nLen; et }T%~T } GxKqD;;u?= catch(IOException e) R[;zX(y { V#`fs|e;y e.printStackTrace (); sxt-Vs7+6 } *;Ed*ibf (e[}/hf6 8:/e
GM return n; /IM#.v } ,j$Vvz )'4k|@8| #/Eb*2C`b } W]5USFan P<f5*L#HD 8A+SjJ4$ /* m`FNIY **SiteInfoBean.java UNkCL4N */ Ba/Yl package NetFox; u,w:SM@*( `4~H/'%QB n;:rf 7hGY public class SiteInfoBean { -
h9?1vc7 wy}k1E'M %!PM&zV private String sSiteURL; //Site's URL 9t#S= DP private String sFilePath; //Saved File's Path 2!$gyu6bpG private String sFileName; //Saved File's Name yd?x=| private int nSplitter; //Count of Splited Downloading File &w1P\4?G mljh|[ 4- [J@ public SiteInfoBean() ^)W[l!!<) {//nSplitter的缺省值为5 ()3O=! //default value of nSplitter is 5 iX4Iu3 this("","","",5); z~>pVs } INyk3`FT sn?]n~z _`pD`7:aI^ public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) \}
^E`b { [mPjP%{=@ sSiteURL= sURL; @!8ZPiW< sFilePath = sPath; d:i;z9b@to sFileName = sName; Jyqc2IH this.nSplitter = nSpiltter; #Z<a
6KOlY>m] 1"e)5xI } mI>,.&eo -P]sRl3O; 2[r^M'J public String getSSiteURL() ^tCd L@$AS { ]C:l,I return sSiteURL; <&:=z?30" } E_bO9nRHV Y
"VY%S^ PxfY&;4n! public void setSSiteURL(String value) R?p00 { {4-[r#R<M sSiteURL = value; Yp:KI7 } q.()z(M7 v= N!SaK{ w&x!,yd; public String getSFilePath() QurW/a { ZPD[5)~ return sFilePath; Cj?L@%" } RJ$7XCY%`* NZ3/5%We/ +r<0zh,n. public void setSFilePath(String value) [o<VVtB.Gk { tyDM'|p sFilePath = value; 5T:i9h } I'@Ydt2 Q(\4]i< S IEcf public String getSFileName() kWrp1` { e~"fn*" return sFileName; $]q8,
N|1 } Bk+{RN(w v%RP0%%{s A2nqf^b{# public void setSFileName(String value) is@b&V] { M_%B|S
{ sFileName = value; l3IWoa&sh } >(snII bl'z<S,
' lbuAE% public int getNSplitter() YX_gb/A { v$ub~Q6W return nSplitter;
$/7pYl\n } m-jHze`D3 E~AjK'Z 5P'p2x#U public void setNSplitter(int nCount) c-Pw]Ju { +L5\; nSplitter = nCount; e0$=!QlPr } =dx1/4bZl| } !XzF67 > z^# HdLH2+|P;D /* Ii:>xuF& **Utility.java {iq3|x2[ : */ -<_Ww\%8M package NetFox; {H{X[p8 #-GJ&m8 XduV+$03 public class Utility { E(i[o? +z$pg O%ug@& S{ public Utility() W\L`5CW { R9!Uo TET`b7G _Um d } .%82P( Kn?lHH*w7 //线程睡眠 e*.b3z public static void sleep(int nSecond) VnT>K9&3 { SnYLdwgl try{ H&yD*@ Thread.sleep(nSecond); XB[<;*Iz } 0j_bh,zG# catch(Exception e) gp-T"l { nIvJrAm4k e.printStackTrace (); Z'k|u4ZC } 9Mgq1Z } d|iy#hy"_ Q*XE
h //日志 q}FVzahv public static void log(String sMsg) aBzszp]l+ { @+WQ ^ System.err.println(sMsg); C8L'si } +L=*:e\j y8\S}E0 >~\89E02 public static void log(int sMsg) MJ\ eh>v& { %riK+ System.err.println(sMsg); k'PQ}
,Vb } d;+[i } Zx$ol;Yd W#Qmv^StZ _aPh(qprc /* ]0r|_)s **TestMethod.java 3or\: */ #YSF&*
package NetFox; &ciN@nJ|$z S{K0.<,E 8/"fWm/ public class TestMethod { q-Qxbg[>e Vj!rT
<@ wP/A^Rs public TestMethod() Eaqca{%/^ { ///xx/weblogic60b2_win.exe ?J,AB #+ try{ j.:h5Y^N SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5);
x3zj?- //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); D\ H/ SiteFileFetch fileFetch = new SiteFileFetch(bean);
ayBRWT0 fileFetch.start(); AE@NOM7u } Urgtg37 catch(Exception e){e.printStackTrace ();} TH &qX 5IKL#V`3a 5#E |R } wJlX4cT4YV pN&c(=If m~'? /!! public static void main(String[] args) Yh)Isg|0> { :L
3&FA new TestMethod(); sFDG) } W~Z<1[ } a83g\c5 点击下载更多相关资料
|