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/* d/B'[Ur **SiteFileFetch.java #M5_em4kN */ OGJ=VQA package NetFox; Y5ogi) import java.io.*; }pMP!%| import java.net.*; "F-Y^ E
&7@#'l c[VrC+e m public class SiteFileFetch extends Thread { ?&znUoB *O@sh 4E=0qbt8 SiteInfoBean siteInfoBean = null; //文件信息Bean "v(G7*2 long[] nStartPos; //开始位置 a`H\-G long[] nEndPos; //结束位置 FUaI2 FileSplitterFetch[] fileSplitterFetch; //子线程对象 8F zHNG long nFileLength; //文件长度 ~->Hlxze'K boolean bFirst = true; //是否第一次取文件 JbE?a[Eg? boolean bStop = false; //停止标志 E-~mOYea File tmpFile; //文件下载的临时信息 8p (!]^z DataOutputStream output; //输出到文件的输出流 fokwW}>B[f vd}*_d //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) x*.Ye5Jb public SiteFileFetch(SiteInfoBean bean) throws IOException Yd'H+r5b { ajn-KG!A siteInfoBean = bean; c 9rVgLqn! //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); F=XF] tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); "7Eo>g if(tmpFile.exists ()) R?
O-x9 { FU%~9NKX bFirst = false; GR,J0LT read_nPos(); Aoj6k\YX } dQ: ?<zZ else K7IyCcdB { Kb}MF9?:e nStartPos = new long[bean.getNSplitter()]; C"w,('~@kW nEndPos = new long[bean.getNSplitter()]; GDF{Lf)/v } U1l0Uke $ye^uu;Z xXF2"+ W_^>MLq } ajW[eyX jFtg.SD $#5klA public void run() Bi]D{m9 { $[,l-[-+ //获得文件长度 vXephR' //分割文件 B4Q79gEh= //实例FileSplitterFetch KiQ(XNx //启动FileSplitterFetch线程 q"S(7xWS //等待子线程返回 SO`dnf try{ U\Ct/U&A? if(bFirst) Hk,lX r { z^r|3; nFileLength = getFileSize(); |K%}}g[<e; if(nFileLength == -1) Rab#7Q16Q8 { '9qn*H`' System.err.println("File Length is not known!"); 2G?$X? } 1t+%Gv^sK else if(nFileLength == -2) tJ"az=? { Yi 6Nw+$ System.err.println("File is not access!"); Rho5s@N 7 } -Q#o)o
else HOfF"QAR$ { Q uB+vL for(int i=0;i<nStartPos.length;i++) Vt'L1Wr0v { jZRh KT nStartPos = (long)(i*(nFileLength/nStartPos.length)); MEEAQd<* } <yZP|_ for(int i=0;i<nEndPos.length-1;i++) 2B^~/T<\ { sxo;/~.p nEndPos = nStartPos[i+1]; u+i (";\ } lX"b N=E?! nEndPos[nEndPos.length-1] = nFileLength; V]rhVMA } ;1v=||V } 0Q'v HZ" &
1[y"S ]u+MTW; //启动子线程 S_2"7 fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; `)$`-Pw* for(int i=0;i<nStartPos.length;i++) L1wZU, o { P.cO6+jGR fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), H'EY)s Hi siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), ZRnL_z~ nStartPos,nEndPos,i); w:}C8WKw Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); 3qtr9NI fileSplitterFetch.start(); vf<UBa;Xm } M ?*Tf& // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), Gg|M+M?+ siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); r0\?WoF2C // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", bj}=8k0 nEndPos = " + nFileLength);
O}C)~GU // fileSplitterFetch[nPos.length-1].start(); ,^ 7 CP zie=2 MLV:U //等待子线程结束 '.Z4 hHX //int count = 0; ^;r+W-MQ //是否结束while循环 4=xq:Tf boolean breakWhile = false; "b]#MO}P dCe X}Z e0 u,zg+m while(!bStop) U'y,YtF@ { :I
\9YzSs@ write_nPos(); (bv,02 Utility.sleep(500); hL!QLiF: breakWhile = true; L,?/'!xV h*3{6X#(/ R"3
M[^ for(int i=0;i<nStartPos.length;i++) 'tm$q/& { {oUAP1V^ if(!fileSplitterFetch.bDownOver) JO=1ivZl { h%TLD[[/jr breakWhile = false; WhFS2Jl0 break; \3zp)J } rQJ"&CapT } K"\MU if(breakWhile) Hm
fXe break; _9@ >;] >.<ooWw YTQps&mD. //count++; -Wc~B3E| //if(count>4) _6MdF<Xb/ // siteStop(); B[F-gq- } KzphNHd :$g8Zm,y DI1(`y System.err.println("文件下载结束!"); __I/F6{ 9V } J[@um: catch(Exception e){e.printStackTrace ();} 3F+Jdr' } cSK&[>i)4 0y~<%`~ f<<rTE6 //获得文件长度 ,%W<O. public long getFileSize() XV>&F{ { >o~Z>lr int nFileLength = -1; eEl.. y try{ T5|c$doQ URL url = new URL(siteInfoBean.getSSiteURL()); |cDszoT
/ HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); 0q,pi qjO httpConnection.setRequestProperty("User-Agent","NetFox"); M T6/2d P`jL]x Wto;bd int responseCode=httpConnection.getResponseCode(); C5@V/vA if(responseCode>=400) :!Ig- +W { l-Nly>~ processErrorCode(responseCode); iev>9j return -2; //-2 represent access is error l&W;b6L } y3eHF^K+$ KrcgIB8X A6{b?aQ String sHeader; B$vr'U
#yW\5) VK:8 Nk_y for(int i=1;;i++) AIRr{Y { FT89*C)oD //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); y(a!YicA? //Utility.log(in.readLine()); eV7u*d? sHeader=httpConnection.getHeaderFieldKey(i); U#
JIs if(sHeader!=null) wO.iKX; { Q@-ovuxi if(sHeader.equals("Content-Length")) ` ;)ZGY\ { o.7{O,v nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); kKiA break; L]d-33.c!H } EQ<RDhC@b } nSx]QREL! else [/ M` break; DmqSQA } . + } A],ooiq< catch(IOException e){e.printStackTrace ();} :+rUBYWx catch(Exception e){e.printStackTrace ();} VDbI-P&c P"_$uO( 5x }
JiSmi6o Utility.log(nFileLength); qO@@8/l bKDA!R2 ][;G=oCT return nFileLength; $`VFdAe } 57,dw-|xi TDt Amk ]N{0:Va@D //保存下载信息(文件指针位置) Anm=*;*M` private void write_nPos() beXNrf=bG { sJG5/w try{ hk>;pU( output = new DataOutputStream(new FileOutputStream(tmpFile)); MJ{%4S{K,p output.writeInt(nStartPos.length); )ChqATKg for(int i=0;i<nStartPos.length;i++) kA wNly { i38[hQR9a // output.writeLong(nPos); [KJ
q output.writeLong(fileSplitterFetch.nStartPos); 5W? v'" output.writeLong(fileSplitterFetch.nEndPos); ,*I@ } gI]GUD- output.close(); H%F>@(U } :G5uocVk catch(IOException e){e.printStackTrace ();} ^dm!)4W catch(Exception e){e.printStackTrace ();} qk/:A+ } %G3(,Qz O) atNE 3AcD,,M>> //读取保存的下载信息(文件指针位置) eqAW+Ptx private void read_nPos() zDTv\3rZ4X { xdvh-%A4 try{ 3< Od0J DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); :4gLjzL int nCount = input.readInt(); bM,1 f/^ nStartPos = new long[nCount]; M~Ttb29{ nEndPos = new long[nCount]; Cq)IayD@ for(int i=0;i<nStartPos.length;i++) O1&b]C# { XFVV},V
nStartPos = input.readLong(); tWeFEVg nEndPos = input.readLong(); >slm$~rv } 5Por "&% input.close(); }J:+{4Yn } 5N[9
vW catch(IOException e){e.printStackTrace ();} Z;l`YK^- catch(Exception e){e.printStackTrace ();} [U@;\V$ } _ *f ``VW;l{ PQN@JaD private void processErrorCode(int nErrorCode) +HT1 ct+dI { -_C#wtC System.err.println("Error Code : " + nErrorCode); vQ}6y } PxS4,`#~ 7JJ/D4uT $Xm6N@ //停止文件下载 I
pzJ# public void siteStop() bg,9@ }"F { Cqii} bStop = true; 6z0@I* for(int i=0;i<nStartPos.length;i++) XQ%4L-rhN fileSplitterFetch.splitterStop(); YKmsQ(q`N azQ D> ev1 W6B-a } 8mT M$#\ } 1NQbl+w#I //负责部分文件的抓取 lKWPTCU **FileSplitterFetch.java ~S,p?I */ mrIh0B:` package NetFox; 7\]E~/g zmj"fN{\ t\P<X^d% import java.io.*; ;5-r_D;9 import java.net.*; "tFxhKf 2*"Fu:a"`I .MQ^( public class FileSplitterFetch extends Thread { qy)_wM BrRL7xX K~=UUB String sURL; //File URL sJwyj D$b long nStartPos; //File Snippet Start Position /sM~Uq? long nEndPos; //File Snippet End Position AfeCK1mC @ int nThreadID; //Thread's ID fXI:Y8T boolean bDownOver = false; //Downing is over DejA4XdW boolean bStop = false; //Stop identical oi}i\:
hI FileAccessI fileAccessI = null; //File Access interface ~qe%Yq 7dsefNPb sGh(#A0Pt public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException Y!iZW { 1f",}qe; this.sURL = sURL; }_=eT] this.nStartPos = nStart; su*Pk|6% this.nEndPos = nEnd; m]i @ +C nThreadID = id; kmzH'wktt fileAccessI = new FileAccessI(sName,nStartPos);//定位 3(C\.oRc } DCqY|4Qc .ERO|$fv ]Q]W5WDe: public void run() f&v9Q97= { 9zYVC[o while(nStartPos < nEndPos && !bStop) ctE\ q { uqz]J$ }D+}DPL{^ X7k.zlH7T try{ aQ:5d3m0 URL url = new URL(sURL); r.7$&BCng HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); )95f*wte httpConnection.setRequestProperty("User-Agent","NetFox"); `+6R0Ch String sProperty = "bytes="+nStartPos+"-"; lHgs;>U$ httpConnection.setRequestProperty("RANGE",sProperty); Xpzfm7CB/ Utility.log(sProperty); cGjPxG; \&U>LwZd? Ft}@1w5 InputStream input = httpConnection.getInputStream(); 9tF9T\jW //logResponseHead(httpConnection); jKt7M>P Eke5Nb 2-Y<4'> byte[] b = new byte[1024]; TB0
5?F int nRead; !K|5bK while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) mI 74x3 [ { <b,~:9*? nStartPos += fileAccessI.write(b,0,nRead); oudxm[/U //if(nThreadID == 1) [eTSZjIN7 // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); 9on@Q_7m } ~69&6C1Ch )1X#*mCxk P.gb1$7< Utility.log("Thread " + nThreadID + " is over!"); '7O3/GDK bDownOver = true; Gea\,{E9xA //nPos = fileAccessI.write (b,0,nRead); 13taFVdU } {<<U^<6} catch(Exception e){e.printStackTrace ();} 6gc>X%d `K } ]+X@
7 } s[UHe{^T / m=HG^! B}^w_C2 //打印回应的头信息 Hh+ 2mkg public void logResponseHead(HttpURLConnection con) eM8}X[ { '-zD for(int i=1;;i++) dAuJXGo { 82l~G;.n3 String header=con.getHeaderFieldKey(i); Bve.C
if(header!=null) HTG%t/S //responseHeaders.put(header,httpConnection.getHeaderField(header)); ~3<>
3p Utility.log(header+" : "+con.getHeaderField(header)); wmTb97o else d3xmtG {i break; F6z%VWU } ;+ "+3 } )ut&@] F w?[lS M3.do^ss public void splitterStop() {.XEL { YPxM<Gfa8 bStop = true; Yw-G' } ov, hI>0!D (!:,+*YY YOcO4
} 7Op>i,HZk\ v?geCe=ng Rb'|EiNPw /* @{25xTt **FileAccess.java 0)gdB'9V_ *//文件访问(定位,写) \kZ? package NetFox; RCpR3iC2 import java.io.*; ff^=Ruf$ W)bLSL]`E 1jcouD5?H public class FileAccessI implements Serializable{ }~L.qG E 7{U|\ //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 H*}y^)x RandomAccessFile oSavedFile; ~A\GT$ long nPos; > ;*b|Ik |!4K!_y o4Om}]Ti public FileAccessI() throws IOException ln6d<;
M5 { a^I\ /&aw' this("",0); F'21jy& } ~nay" g: .:F%_dS D LU!a'H'Q public FileAccessI(String sName,long nPos) throws IOException 9w7n1k. { 4\iOeZRf oSavedFile = new RandomAccessFile(sName,"rw"); oG_~q
w|h this.nPos = nPos; T{-CkHf9Q oSavedFile.seek(nPos); fb e[@#: } \XZ/v*d0
ds<2I,t ``hf=`We public synchronized int write(byte[] b,int nStart,int nLen) ~x1$h#Cx' { !2f[}.6+ int n = -1; asppRL|| try{ R\!2l|_ oSavedFile.write(b,nStart,nLen); I=`U7Bis" n = nLen; Fj2BnM3# } ;~m8;8) catch(IOException e) uxr #QA { #V~me e.printStackTrace (); a.k.n< } 0Qf,@^zL* P/W
XaE4 [M=7M}f; return n; QTk}h_<u } !$gR{XH$] GjvOM y VA#"r!1 } I&x=; 9y"@( 0AL=S$B) /* p8Qk'F=h **SiteInfoBean.java fHx*e'eA */ v dc\R? package NetFox; ek*rp`y] x??+~$}\*- | ATvS2 public class SiteInfoBean { +%h8r5o1 c(xrP/yOwi Ng2twfSl$ private String sSiteURL; //Site's URL Z 2V.3 private String sFilePath; //Saved File's Path L>Fa^jq5 private String sFileName; //Saved File's Name 86=}ZGWd private int nSplitter; //Count of Splited Downloading File Ga^"1TZ x
iu=7O ,/Z%@-rF public SiteInfoBean() ;n*.W|Uph {//nSplitter的缺省值为5 Yi%;|] //default value of nSplitter is 5 ymhtX6] this("","","",5); qN9(S:_Px } Kqb#_hm y51e%n$ NJWA3zz
public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) I-]?"Q7Jz { .ypL=~Rp sSiteURL= sURL; ^ @s1Z7 sFilePath = sPath; Ot_]3:`J~ sFileName = sName; 6]WAUK%h this.nSplitter = nSpiltter; |\pj;XU h+g_rvIG* /NI;P]s. } y.mda:$~= Z&+ g;(g c tZ uA+ public String getSSiteURL() FrGgga$ { hF~n)oQ return sSiteURL; \/r}]Vz } PR#exm& k<CJ{u0< 7rc0yB
public void setSSiteURL(String value) X9W@&zQ { X!TpYUZ' sSiteURL = value; Tztu}t]N } [
)Iv^ U9 ;u_X) l*Gvf_UH public String getSFilePath() @zW]2 c { -A^ _{4X return sFilePath; +SR+gE\s0 } P^~yzI _7Ju ] vHF~|/- public void setSFilePath(String value) g[' ^L+hd { WUn]F~Lt sFilePath = value; u5`u>.! } -:+|zF@f oM>l#><nq ~D j8z+^ public String getSFileName() Cn34b_Sbd { ?Jm^< return sFileName; ].w4$OJ? } v!~fs)cdE| MS~(D.@ZS !GjQPAW public void setSFileName(String value) V(I8=rVH { QOGvC[*`<T sFileName = value; i+ ?^8# } C_}]`[ {H>gtpVy mp1@|*Sn public int getNSplitter() F]O`3e=! { Cw3a0u return nSplitter; ?=sDM& ' } J/y83@ @Md/Q~> yLvDMPj public void setNSplitter(int nCount) < `=j^LU { UERLtSQ nSplitter = nCount; .5_2zat0H } 2`K=Hby } gh]cXuph ZPLm]I\] AofKw /* SwGx?U **Utility.java Mk 6(UXY */ Qz1E 2yJ package NetFox; `r6 ,+& UcHJR"M~c Rsm^Z!sn public class Utility { yS'I[l tCH!my_ rpha!h>w1% public Utility() q"lSZ;
'E { -=Q*Ml#I ~!d\^Z^i 9s
q } V~3a!-m\ N#_H6TfMG //线程睡眠 L,/%f<wd public static void sleep(int nSecond) .W%)*&WH\ { b{&)6M)zo try{ Dcgo%F-W Thread.sleep(nSecond); ?dg[:1R} } Se}c[|8 catch(Exception e) j3V
-LnA { 194)QeoFw e.printStackTrace (); CY5Z{qiX } )mT<MkP } S9y} v@L;x [Q //日志 U?Zq6_M& public static void log(String sMsg) 6<QQ@5_ { @Cyvf5|bL System.err.println(sMsg); 4xje$/_d
} *w\W/ Y $Ds2>G4c B~ GbF*j public static void log(int sMsg) 77f9(~ZnT { N=}A Z{$ System.err.println(sMsg); 83_h J } 013x8!i } #=A)XlZMd e X|m AQvudx)@" /* 6A-|[(NS **TestMethod.java /W<;Z;zk */ G5 WVr$ package NetFox; |u<7?)mp wlqksG[B ^6V[=!& H public class TestMethod { "ze|W\Bv! &j"?\f? db7B^|Di
public TestMethod() g8% &RG { ///xx/weblogic60b2_win.exe #q=Efn' try{ +a+Om73B2 SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); '-~~-}= sJ //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); 1>h]{%I SiteFileFetch fileFetch = new SiteFileFetch(bean); u&7[n_ fileFetch.start(); zRr*7G } #)O65GI catch(Exception e){e.printStackTrace ();} aX'*pK/- sDlO# %P|/A+Mg" } sUQ@7sTj hHnYtq }19\.z&J public static void main(String[] args) \_f(M| { n{mfn*r. new TestMethod(); +ye3HGD } m;QMQeGz } w<(pl% 点击下载更多相关资料
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