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/* qnj'*]ysBC **SiteFileFetch.java zUv#%Q8vw */ '/@wk#, package NetFox; 4sn\UuKyL import java.io.*; 650qG$ import java.net.*; !8cV."~ h"0)spF"d *0eU_*A^zO public class SiteFileFetch extends Thread { +FqE fY4j zhFm2 v*=P SiteInfoBean siteInfoBean = null; //文件信息Bean SZHgXl3: long[] nStartPos; //开始位置 fC*cqc~{@ long[] nEndPos; //结束位置 /9I/^i~ FileSplitterFetch[] fileSplitterFetch; //子线程对象 H;=Fq+ long nFileLength; //文件长度 $#u'XyA boolean bFirst = true; //是否第一次取文件 )S2yU<6oOt boolean bStop = false; //停止标志 A!x &,< File tmpFile; //文件下载的临时信息 NE8W--Cg| DataOutputStream output; //输出到文件的输出流 %%uE^nX> gC/ e]7FNr //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) T+$H[&j public SiteFileFetch(SiteInfoBean bean) throws IOException l&qCgw { c:9n8skE7 siteInfoBean = bean; Q
zaD\^OF //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); wL
4Y%g tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); _J W|3q if(tmpFile.exists ()) 'OziP { 0x!&> bFirst = false; u%)gnj_ read_nPos(); Hn(1_I%zF } o1$u;}^ | else {.{Wl,|7 { Rxd4{L
)n nStartPos = new long[bean.getNSplitter()]; 9 =;mY nEndPos = new long[bean.getNSplitter()]; 4Qfsxg } AT~, >dt*^}* 71c[`h*0{ ~&73f7 } 1Qf}nWy K?!qNK rXX>I;`& public void run() PWpt\g { cu0IFNF}[ //获得文件长度
=
(F //分割文件 2Kz+COP+ //实例FileSplitterFetch P#~B@d //启动FileSplitterFetch线程 YNU}R/u6^ //等待子线程返回 d7X&3L%Oq try{ E6A"Xo if(bFirst) tUJRNEg { b]+F/@h~] nFileLength = getFileSize(); mUh]`/MK$ if(nFileLength == -1) e yJ07 { Yv;s3>r
System.err.println("File Length is not known!"); YZBh}l6t } ((k"*f2% else if(nFileLength == -2) ~.m<`~u { ;hX( /T System.err.println("File is not access!"); I9*cEZ!l=e } RwWg:4 else 8vY-bm,e { RP&bb{Y for(int i=0;i<nStartPos.length;i++) (CmK>"C+ { Ic#xz;elM nStartPos = (long)(i*(nFileLength/nStartPos.length)); @^W`Yg)C } O<gfZ> for(int i=0;i<nEndPos.length-1;i++) #&&T1;z"# { u*l|MIi6J nEndPos = nStartPos[i+1]; Z'JS@dV } S\e&xUA;| nEndPos[nEndPos.length-1] = nFileLength; 9)q3cjP{< } fd\RS1[ } yw3"jdcl x *eU~e_jP \c=I!<9 //启动子线程 HGDrH fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; |cPHl+$nh. for(int i=0;i<nStartPos.length;i++) k9^Hmhjw { D6sw"V# fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), hRcb}>pr siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), \oQ]=dDCd% nStartPos,nEndPos,i); ie}OZM Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); xvr5$x|h fileSplitterFetch.start(); K"}fD;3 } mo0\t#jA // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), p5Q]/DhG siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); .J"N} // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", XH:*J+$O nEndPos = " + nFileLength); !d*[QD8 // fileSplitterFetch[nPos.length-1].start(); "n-'?W! US6_5>/ <#63tN9 //等待子线程结束 AKNx~!%2 //int count = 0; j=_rUc'Me //是否结束while循环 mCtS_"W boolean breakWhile = false; ::L2zVq5V VSj!Gm0LB ));#oQol9 while(!bStop)
PJnC { Gn]36~)*H write_nPos(); ,w
}Po Utility.sleep(500); $6QIYF"" breakWhile = true; H#-3 eE;tiX/ xS18t=" for(int i=0;i<nStartPos.length;i++) e5=d
Ev { @u3`lhUcT if(!fileSplitterFetch.bDownOver) MfTLa)Rz { N!A20Bv breakWhile = false; jXcJ/g(X3 break; ejRK-! } lG*Rw-?a } k#*-<1 if(breakWhile) &{iC:zp break; Vs>Pv$kW b^Hrzn 93-Y(Xx)bY //count++; TFVQfj$r //if(count>4) ffCDO\i({ // siteStop(); 2`yhxO }
fF:57*ys ~/:vr gmTBT#{6yH System.err.println("文件下载结束!"); .@dC]$2= } ;'!x catch(Exception e){e.printStackTrace ();}
D+8d^-: } l,wlxh$}( NgNGq\! " T(hcI //获得文件长度 L
aTcBcI public long getFileSize() V>$( N/1 { <Ij!x`MS+ int nFileLength = -1; -K"'F`;W try{ vwR_2u URL url = new URL(siteInfoBean.getSSiteURL()); CjdM*#9lW HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); FU|brSt httpConnection.setRequestProperty("User-Agent","NetFox"); ]A4=/6`g?b |5@Ra@0 &\zYbGU int responseCode=httpConnection.getResponseCode(); W?7l-k=S if(responseCode>=400) wcHk]mLM { #ydold{F processErrorCode(responseCode); O5dS$[`j\p return -2; //-2 represent access is error Da^q9,| } 4^_6~ YP7 lR(9;3 LPs%^*8(2 String sHeader; j:9M${~ mq:k|w^6 dQX-s=XJ for(int i=1;;i++) $m`Dyu { .Xg.,kW //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); OqGp|` //Utility.log(in.readLine()); I2}W /} sHeader=httpConnection.getHeaderFieldKey(i); ! FcGa if(sHeader!=null) UG1<Xfu| { i Ad&o`C if(sHeader.equals("Content-Length")) ZvY"yl?e { OjU{r N* nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); V:0IBbh)w break; ^`H'LD } M-WSdG[AJ } B=Hd:P| else O[X*F2LC4 break; z$ ^d_) } HOW<IZ^ } PW*Vfjf4 catch(IOException e){e.printStackTrace ();} --HDE c| catch(Exception e){e.printStackTrace ();} 8lQ/cGAc VPCI5mS_ j/v>,MM Utility.log(nFileLength); 4+olyBht bGh&@&dHr ra^</o/ return nFileLength; \Y# } qxRsq&_ e9acI>^w g4W$MI //保存下载信息(文件指针位置) $W._FAAJ# private void write_nPos() ui]iOp { 1q}32^>+o try{ ,#a4P`q'iC output = new DataOutputStream(new FileOutputStream(tmpFile)); NF$6yv9C output.writeInt(nStartPos.length); DpHubqWz for(int i=0;i<nStartPos.length;i++) vbJ<|#|r- { v}>g* @ // output.writeLong(nPos); mF
gqM: output.writeLong(fileSplitterFetch.nStartPos); CKw-HgXG output.writeLong(fileSplitterFetch.nEndPos); LcKc#)'EE } ? [Yn<| output.close(); %6ckau1_; } DLwlA!z catch(IOException e){e.printStackTrace ();} `(W"wC catch(Exception e){e.printStackTrace ();} |dIR v } :GvC#2p e.\>GwM RqROl!6 //读取保存的下载信息(文件指针位置) cGE{dWz private void read_nPos() 1@Ba7>%' { ?M90K)&g{ try{ (JU8F-/9 DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); |\bNFnn( int nCount = input.readInt(); 8;M,l2pmR{ nStartPos = new long[nCount]; #kQ! GMZH nEndPos = new long[nCount]; n%r>W^2j for(int i=0;i<nStartPos.length;i++) ;apLMMsWC { zDg*ds\ nStartPos = input.readLong(); 8hV]t'/; nEndPos = input.readLong(); ( w4XqVT } l(Y32]Z input.close(); Ioe.[&o6B } ~U+<JC Z catch(IOException e){e.printStackTrace ();} kr$)nf catch(Exception e){e.printStackTrace ();} hLfWDf*T| } h5{//0 y +s}!+I8P 7L+Wj }m private void processErrorCode(int nErrorCode) 2?(/$F9X, { M_O$]^I3w System.err.println("Error Code : " + nErrorCode); (,"%fc7<i } J^t0M\ Gb2|e.z %X\J%Fj //停止文件下载 X6sZwb public void siteStop() d%@0xsU1 { !yg &zzP* bStop = true; ,%Pn.E* r; for(int i=0;i<nStartPos.length;i++) Sw$&E fileSplitterFetch.splitterStop(); )fXxkOd D~qi6@Ga qV=O; } ym
p*:lH( } j % MY6" //负责部分文件的抓取 7<kr|- **FileSplitterFetch.java va~:Ivl-) */ y2k's package NetFox; SFzoRI=qG 8<Nz34Y ldG8hK import java.io.*; &WCVdZK: import java.net.*; 7d{xXJ- @#"K6 wV-N\5!r%H public class FileSplitterFetch extends Thread { [)IaXa h1)+QLI sS)tSt{C String sURL; //File URL 7F~Jz*,B*W long nStartPos; //File Snippet Start Position aSm</@tO& long nEndPos; //File Snippet End Position YC{7;=Pf int nThreadID; //Thread's ID Z(E.F,k boolean bDownOver = false; //Downing is over u`L* boolean bStop = false; //Stop identical z:n
JN%Qb FileAccessI fileAccessI = null; //File Access interface "{{@N4^ HDo=W qG N}|1oQkjf public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException $
z+
=lF { JjAO9j% this.sURL = sURL; kSJ:4! lFU this.nStartPos = nStart; <^Q`
y this.nEndPos = nEnd; LQ$dT#z2A nThreadID = id; c1]\.s fileAccessI = new FileAccessI(sName,nStartPos);//定位
?s 0")R& } d{^K8T3 @S012} xH lZ+1A0e public void run() Tq6@
1j6p { |qk%UN< while(nStartPos < nEndPos && !bStop) `Q^Vm3h { {.,y v>% [s!c c:JR [yAR%]i-7 try{ 9/\=6vC| URL url = new URL(sURL); !hPe*pPVV) HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); Bsz;GnD|r httpConnection.setRequestProperty("User-Agent","NetFox"); qr/N ?, String sProperty = "bytes="+nStartPos+"-"; I'cM\^/h httpConnection.setRequestProperty("RANGE",sProperty); !P)7t`X Utility.log(sProperty); _`94CC: XG6UV(' ?@_,_gTQ InputStream input = httpConnection.getInputStream();
XN'X&J //logResponseHead(httpConnection); 20uR? /|@ M7lMOG(\ |}roR{gc| byte[] b = new byte[1024]; X"G3lG int nRead; yIThzyS while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) mCpoaGV_ {
t#g6rh& nStartPos += fileAccessI.write(b,0,nRead); w3IU'(|G //if(nThreadID == 1) uRNc9 // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); 8>jd2'v{ } KK*"s^L hMs}r,* fx4X!(w!B Utility.log("Thread " + nThreadID + " is over!"); .!t'&eV bDownOver = true; Uz!cVs?- //nPos = fileAccessI.write (b,0,nRead); `qsn; } BPKeG0F7 catch(Exception e){e.printStackTrace ();} l>9ZAI\^ } 5G=CvGu } _zO,VL o' DXd[y Z-j%``I?h //打印回应的头信息 {4{ACp public void logResponseHead(HttpURLConnection con) s.I=H^T { HgX4RSU for(int i=1;;i++) A]vQ1*pnk { *%cI,}% String header=con.getHeaderFieldKey(i); -OuMC& if(header!=null)
FyQ^@@ //responseHeaders.put(header,httpConnection.getHeaderField(header)); DI!l.w5P_ Utility.log(header+" : "+con.getHeaderField(header)); AuU:613]W8 else Z;i^h,j?$1 break; Kc\0-3 Z } $y> J= } U07n7`2w BiHBu8< 15gI-Qb public void splitterStop() QTK{JZf { .x1EdfHed/ bStop = true; s\Cl3 } :h3
Gk;u {{=7 mbc +Mv0X%(N } w>rglm& !H,R$3~ )mZ`j. /* 'F[Q E9]* **FileAccess.java
c:~o e *//文件访问(定位,写) ipKkz package NetFox; iygdX2 import java.io.*; D9c8#k9Y. T cSj`- r0j:ll d public class FileAccessI implements Serializable{ TiF$',WMv +V7*vlx- //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 ZT_ EpT=1 RandomAccessFile oSavedFile; F+L q long nPos; ~&4,w9b)j I[<C)IG D@4hQC\ public FileAccessI() throws IOException FQ(=Fnqn { OjeM#s#N! this("",0); -F|(Y1OE } 'n.eCdj ^X0<ZI iAWPE`u4 public FileAccessI(String sName,long nPos) throws IOException t_@%4Wn!1L { D@d/O oSavedFile = new RandomAccessFile(sName,"rw"); bUz7!M$ this.nPos = nPos; &sWq SS oSavedFile.seek(nPos); D
7H$!(F> } Ql\{^s+ cKK 1$x }e9:2 public synchronized int write(byte[] b,int nStart,int nLen) WRFzb0;01 { nKkI int n = -1; o $p*C try{ 4(
^Ht oSavedFile.write(b,nStart,nLen); gnB%/g[_ n = nLen; /_woCLwQ# } zj`!ZY?fv catch(IOException e) OYNs1yB { X )g<F e.printStackTrace (); CQzJ_aSJ( } nvsuF)%9hZ {o5E#<) :)?w2'O return n; ],&WA?>G } d^WVWk K <q%buyQna JyYg)f } SgFyv<6>: *)U=ZO6S p^7ZFUP /* @+:S'mAQC **SiteInfoBean.java }O5c.3 */ ~%k<N/B package NetFox; zpiqJEf|'" ?7/n s>} lySeq^y?Q public class SiteInfoBean { q%"]}@a0 I%b,
H` 4=>/x90y private String sSiteURL; //Site's URL G;qC&7T private String sFilePath; //Saved File's Path Mfuw y private String sFileName; //Saved File's Name I(bH.{1n7 private int nSplitter; //Count of Splited Downloading File $^y6>@~ H)G ^ Y1 @T|mHfQ8 public SiteInfoBean() G?8LYg!- {//nSplitter的缺省值为5 kf~ D m}bV //default value of nSplitter is 5 S;I>W&U this("","","",5); ]ChGi[B~9 } 8kRqF?rbj \>G :mMk/ 3*v&6/K public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) ~MpcVI_K { !GAU?J;<#2 sSiteURL= sURL; SjmWlf, sFilePath = sPath; 3}F{a8iIm sFileName = sName; _rN1(=J this.nSplitter = nSpiltter; ^*$lCUv8p &{R]v/{p] N!Q~?/!d } QnZ7e#@UP Z'<I
Is:J 32S5Ai@Cd" public String getSSiteURL() S 9;:) { &F 3'tf? return sSiteURL; wBJP8wES= } b\.l!v n0 d%(4s~y `,7;2ZG~O public void setSSiteURL(String value) hgU#2`fS { %"gV>E_u sSiteURL = value; g.:b\JE ` } >39\u&) c`M
,KXott v-MrurQ4 public String getSFilePath() BXxl-x { <cUaIb;(4 return sFilePath; ~]l
T>|X } LvcGh `9vCl@"IV &f"kWOe$X public void setSFilePath(String value) OGGuV Y { :&-j{8p- sFilePath = value; j-n-2:Q } =K`]$Og}8 Z{p62|+Ck@ 5n#@,V.O/ public String getSFileName() IPxK$nI^ { UPr8Q^wm return sFileName; e"u89acp } [+_0y[~,tB M?3#XQDvD cpJ(77e public void setSFileName(String value) Ed ,O>( { Uoqt sFileName = value; r)/nx@x } /q\{Os rX m{VC1BkZ >"%}x{| public int getNSplitter() j%TcW!D-_ { >6\rhx> return nSplitter; lr-:o@q{ } ,K 1X/), IHaNg
K2 u^Ss8}d public void setNSplitter(int nCount) t^KoqJ { r!WXD9# nSplitter = nCount; oHvVZ } D8r=Vf } 7O^'?L<C' /'WIgP Im0 #_
\ /* Q ,6[ **Utility.java cUPC8k.1 */ B(l8&
package NetFox; iTpU4Qsj +i1\],7 0*umf.R public class Utility { qt&zo5 %@4/W N !5escR!\D public Utility() ZA!yw7~ { *
U#@M3g. ),#hBB`ZA JAA{5@ST } 2ij/! [tEHr //线程睡眠 kV$$GLD\ public static void sleep(int nSecond) &:MfLDJ { rh%-va9 try{ )VoQ/ch< Thread.sleep(nSecond); !/|^
)d^U } hD I}V1) catch(Exception e) oY$L { ~3F\7%Iqc e.printStackTrace (); z')zVoW, } ]0yYMnqvr } LG6k
KG UvPD/qu$8D //日志 XnCrxj public static void log(String sMsg) #FL\9RXy { |m5 E%E System.err.println(sMsg); fL7u419= } v!b
8_0~u6 P
O{1u%P `4N{x.N public static void log(int sMsg) yk<$XNc { @T6Z3Zj} System.err.println(sMsg); jj&4Sv#> } *w[\(d'T } =e>#oPH ^twJNm{99 QxjX:O /* aTx*6;-PH **TestMethod.java ju= +!nGUa */ AHA4{Zu[ package NetFox; QlFt:?7f xQetAYP` V;V,G+0Re public class TestMethod { =:;KYuTr '\iWp?`$ cIIt ;q[ public TestMethod() Wveba)"$ { ///xx/weblogic60b2_win.exe Z_F}Y2-w9 try{ s, 8a1o SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); 1`X-
O> //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); jW G=k#WN SiteFileFetch fileFetch = new SiteFileFetch(bean); Y^(Sc4 W fileFetch.start(); c T!L+zg } l6C^,xU~IX catch(Exception e){e.printStackTrace ();} ?5oeyBA@ N {$'-[ EpO5_T_ } rkW2_UTZE D<m+M@u 1;4]
HNI public static void main(String[] args) !QB(M@1 { jb~/>I^1 new TestMethod(); Viu+#J;l } +foyPj!% } | Ts0h?"a 点击下载更多相关资料
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