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/* ldG$hk' **SiteFileFetch.java EV~?]Kt~ */ HZ\=NDz package NetFox; wJ7Fnj>u% import java.io.*; 73!])!SVI import java.net.*; g#5t8w 'RR,b*Ql z}p*";)A public class SiteFileFetch extends Thread { b+71`aD0 y<y9'tx "VAbUs SiteInfoBean siteInfoBean = null; //文件信息Bean /{Z<!7u;U long[] nStartPos; //开始位置 k:1|Z+CJ long[] nEndPos; //结束位置 {|Fn<&G FileSplitterFetch[] fileSplitterFetch; //子线程对象 f:9qId
;/M long nFileLength; //文件长度 0#F<JsO|u boolean bFirst = true; //是否第一次取文件 "K*^%{ boolean bStop = false; //停止标志 =&vRT;6 File tmpFile; //文件下载的临时信息 @h7
i;Ok DataOutputStream output; //输出到文件的输出流 @OC*:?!4 A@ w9_qo //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) [g:KFbEY public SiteFileFetch(SiteInfoBean bean) throws IOException g^:7mG6C { 7L!q{%} siteInfoBean = bean; "o<&3c4 //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); 8;Df/% tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); x4@IK|CE if(tmpFile.exists ()) X!]p8Q y { *&W1|Qkg_ bFirst = false; 4&E&{<; read_nPos(); 97VS
xhr } K.6xNQl{} else -O[9{`i] { [b@9V_ nStartPos = new long[bean.getNSplitter()]; gUv`G nEndPos = new long[bean.getNSplitter()]; K_BF=C.k } qg8T}y> EA!I&
mBq .^uYr^(|[ xA"7a } ^g
n7DiIPH u_ym=N57` -r6LndQs public void run() %|By ?i { WR4 \dsgCU //获得文件长度 #pp6 ycy //分割文件 =tfS@o/n //实例FileSplitterFetch `T$CUlt6 //启动FileSplitterFetch线程 4031~A8 //等待子线程返回 mybjcsV4
try{ ZCCwx71j if(bFirst) FtxmCIVIV~ { bA3pDt).p nFileLength = getFileSize(); gA:N>w&<X if(nFileLength == -1) Twr<MXa { ~,P." System.err.println("File Length is not known!"); #5W-*?H } ik|iAWy else if(nFileLength == -2) 'B$qq[l]S { E.OL_ \ System.err.println("File is not access!"); n/-d56 } KdkZ-. else )I9W a*I { x-ShY&k for(int i=0;i<nStartPos.length;i++) s4Z5t$0| { -<WQ>mrB& nStartPos = (long)(i*(nFileLength/nStartPos.length)); a$'=a09 } <Q?X'. for(int i=0;i<nEndPos.length-1;i++) HESORa; { -!z,t7! nEndPos = nStartPos[i+1]; [#6Eax,j } &5F@u
IA nEndPos[nEndPos.length-1] = nFileLength; l*C(FPw4 } X3;|h93.a } or1D
6*' Ok&u4'< )mMHwLDwH //启动子线程 q!+m,
!M fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; .ahYjn for(int i=0;i<nStartPos.length;i++) ;.P9t`* { ]za1=~[ fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), +gQoYlso siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), mOvwdRKn nStartPos,nEndPos,i); +c^[[ K" Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); hZ@Wl6FG; fileSplitterFetch.start(); Fi^Q]9.@{ } @.Pe.\Z // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), -Am~CM siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); ]MXeWS( // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", -h<Rby nEndPos = " + nFileLength); SMdQ,n1] // fileSplitterFetch[nPos.length-1].start(); amK.H" b:uMON,H
_A %8oYS //等待子线程结束 >O:j.(*! //int count = 0; @4N@cM0
//是否结束while循环 K)C9)J< boolean breakWhile = false; %l7|+%M.{ n/fMq,<8 1]uHaI( while(!bStop) _n;V iQMu { 3G7Qo write_nPos(); OK}+:Y Utility.sleep(500); Zn`vL52_ breakWhile = true; HXTZ`'Rv ?lYi![.o b{o%`B* for(int i=0;i<nStartPos.length;i++) ]"<
`^ { \Q+<G-Kb. if(!fileSplitterFetch.bDownOver) Gmi$Nl!~ { oX9rpTi breakWhile = false; wv8WqYV break; si nnHQ } *VFUC: } |-c)OS3#D if(breakWhile) /~Q2SrYH break; yI 6AafS~ W c"f 'bpx //count++; *hp3w //if(count>4) <-:gaA`KM // siteStop(); [p+6HF } e!67Na0X( 9
L{JU NyTv~8A`) System.err.println("文件下载结束!"); #Cda8)jl( } nZbfc;da catch(Exception e){e.printStackTrace ();} b[3K:ot+ } :b&O{>M]Y 5X5 &(S\ 8uR4ZE* //获得文件长度 `eat7O public long getFileSize() Vb`m3 { }-:s9Lt int nFileLength = -1; OA??fb,b try{ BiQ7r=Dd. URL url = new URL(siteInfoBean.getSSiteURL()); MXbt`]`_ HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); 0\*6UH httpConnection.setRequestProperty("User-Agent","NetFox"); E5P?(5Nv #
4AyA$t '1[}PmhD int responseCode=httpConnection.getResponseCode(); +IiL(\ew if(responseCode>=400) 'mz
_JM { 0?]*-wvp processErrorCode(responseCode); 7ZbnG@s7 return -2; //-2 represent access is error > !thxG/_ } T=|oZ 'G!w0yF \h DH81L String sHeader; n"'1. Htseu`>_$ 0i2ZgOJ for(int i=1;;i++) DbdxHuKa> { !YlyUHD //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); jj,Y: //Utility.log(in.readLine()); FfnW sHeader=httpConnection.getHeaderFieldKey(i); OQ>r;)/ if(sHeader!=null) >W=
0N( { /h=:heS4$ if(sHeader.equals("Content-Length")) 1'dL8Y { F^Yt\V~T nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); ]~:9b[G2 break; URbu=U } @tvAI2W } ^Tbw#x]2 else 8}FZ1h2
4 break; ZW$PJmz } MXWCYi } 2YD;Gb[8 catch(IOException e){e.printStackTrace ();} v7+f@Z:N* catch(Exception e){e.printStackTrace ();} IG?044Y $*ujX,}xG IT a8*Myj Utility.log(nFileLength); N`7) 88>w LHjGlBy u:r'jb~@ return nFileLength; *xxG@h|5n } z\Vu`Yz w:l/B
'%]Y ^lCys //保存下载信息(文件指针位置) KS($S(Fi private void write_nPos()
9K*yds { +;7Rz_.6f try{ fS50 output = new DataOutputStream(new FileOutputStream(tmpFile)); _{ z.Tu output.writeInt(nStartPos.length); @G0k+ for(int i=0;i<nStartPos.length;i++) !BD+H/A.{ { b&BSigrvou // output.writeLong(nPos); $+eDoI'f output.writeLong(fileSplitterFetch.nStartPos); ViqcJD output.writeLong(fileSplitterFetch.nEndPos); )jbYWR*& } rWKc,A[ output.close(); q.6$-w } h$)},% e catch(IOException e){e.printStackTrace ();} Sr1xG%;|/ catch(Exception e){e.printStackTrace ();} *k:Sg*neVq } KN>U6=WN GQXN1R
V3O<l}ak //读取保存的下载信息(文件指针位置) A+d&aE}3V private void read_nPos() ` z<k7ig { pj. }VF!d try{ gR)T(%W DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); ydOJ^Yty int nCount = input.readInt(); vy?Zz<c; nStartPos = new long[nCount]; <$)F_R~T3 nEndPos = new long[nCount]; 2
F3U,} for(int i=0;i<nStartPos.length;i++) P#5&D*`}h { V=}AFGC85 nStartPos = input.readLong(); {S4^;Va1 nEndPos = input.readLong(); t(FIBf3 } aW-'Jg=@H^ input.close(); >gqM|-uY } J8[N!qDCj catch(IOException e){e.printStackTrace ();} }r:H7&|& catch(Exception e){e.printStackTrace ();} p`ai2`qC` } [UN`~ .c~`{j} ng$`<~=)\ private void processErrorCode(int nErrorCode) dx{ZG'@aH { 9$F '*{8 System.err.println("Error Code : " + nErrorCode); g7G=ga } GmoY~}cg~ "|&xUWJ!) 8Qtd, //停止文件下载 O?|st$g public void siteStop() $ftcYBZa { [ix45xu7 bStop = true; sV{M#UF2 for(int i=0;i<nStartPos.length;i++) HhkubG)\ fileSplitterFetch.splitterStop(); b=<xzvy
V_*TY6 .\1{>A } XKqUbi } o<T_Pjp //负责部分文件的抓取 4OLq **FileSplitterFetch.java QF 2Eg */ ln}2 package NetFox; ^DZ(T+q, @&!HMl ,<]X0;~oB import java.io.*; {bB;TO<b` import java.net.*; lTOO`g S7SD$+fX $agd9z,&m public class FileSplitterFetch extends Thread { noz&4"S.{ 7U_~_yb G&FA~c String sURL; //File URL _\M:h+^ long nStartPos; //File Snippet Start Position OEc$ro=m* long nEndPos; //File Snippet End Position :n36}VG| int nThreadID; //Thread's ID >% a^;gk( boolean bDownOver = false; //Downing is over Wx&gI4~ boolean bStop = false; //Stop identical L$*sv. FileAccessI fileAccessI = null; //File Access interface S0+nQM% $7%e|0jC {L 7O{:J public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException X.V6v4 { kae&,'@JF this.sURL = sURL; nRKh|B) this.nStartPos = nStart;
h"<-^=b this.nEndPos = nEnd; &sJZSrk| nThreadID = id; M7rVH\:[- fileAccessI = new FileAccessI(sName,nStartPos);//定位 Ic_>[E?k } (h;4irfX /$v0Rq9 Ik_u34U public void run() 8RC7Ei { rOC2 S(m while(nStartPos < nEndPos && !bStop) d\Q~L 3x { Zi$v- b*< $@y<.?k>UP EN^C'n try{ A*)G. o: URL url = new URL(sURL); A8bDg:G1i HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); ;E? Z<3{ httpConnection.setRequestProperty("User-Agent","NetFox"); ]=T`8)_r) String sProperty = "bytes="+nStartPos+"-"; k.b->U httpConnection.setRequestProperty("RANGE",sProperty); DpG|Kl|d Utility.log(sProperty); 7;H!F!K] +z/_'DE gc|?$aE InputStream input = httpConnection.getInputStream(); 4Eq$f (QJ //logResponseHead(httpConnection); |fYr*8rH dq$H^BB+> nZ>8r byte[] b = new byte[1024]; dD _(MbTt int nRead; uh`W} n while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) E3X6-J| { NbPv>/r nStartPos += fileAccessI.write(b,0,nRead); 34lt?6%j //if(nThreadID == 1) Qo7]fnnaV // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); /ekeU+j } 1+\ZLy!5: 04eE\%? . e' vc Utility.log("Thread " + nThreadID + " is over!"); $f`\TKlN bDownOver = true; mx`C6G5 //nPos = fileAccessI.write (b,0,nRead); 4c"x&x| } h`X>b/V catch(Exception e){e.printStackTrace ();} vMBF7Jfx } ?2D1gjr } D@:w/W C(( 7 +k=BD s //打印回应的头信息 W-9?|ei public void logResponseHead(HttpURLConnection con) !KiN} p { _&0_@ for(int i=1;;i++) i|zs
Li/ { %au2kG, String header=con.getHeaderFieldKey(i); Uj5%06 if(header!=null) .GG6wL<$? //responseHeaders.put(header,httpConnection.getHeaderField(header)); )m .KV5K! Utility.log(header+" : "+con.getHeaderField(header)); Rlvb@aXgy else g8<Ja (J break; 2, bo } :CH?,x^!@ } 5&}~W)"9 iwJeV J ^{L/) Xy5 public void splitterStop() :Osw4u]JXd { EyJWi< bStop = true; FbxrBM } 3f;W+^NY Jb.
V4 :G+8%pUX] } fJ
\bm $]eU'!2) ^HpUbZpat) /* q/I':a[1 **FileAccess.java 3C8cvi[IS *//文件访问(定位,写) X%iiz package NetFox; Oj6PmUK4 import java.io.*; G[34:J {FV_APL9_ oqu; D'8 public class FileAccessI implements Serializable{ )n8(U%q$ //9M~qHa" //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 kNW}0CDgs RandomAccessFile oSavedFile; U
Ke!zI long nPos; /yRP>CX~ _T,X z_ 1Yj ^N"= public FileAccessI() throws IOException +&t`"lRl& { Jzqv6A3G this("",0); *AEN } QFn .<@ R $vo p#['CqP8 public FileAccessI(String sName,long nPos) throws IOException F(jvdq { :el]IH oSavedFile = new RandomAccessFile(sName,"rw");
{*EA5; this.nPos = nPos; #
tN#_<W oSavedFile.seek(nPos); Q>`|{m } 8t{- @.JhL[f @EPO\\C"f public synchronized int write(byte[] b,int nStart,int nLen) P)VysYb? { %!_okf int n = -1; IhIPy~Hgt try{ KW&5&~)2 oSavedFile.write(b,nStart,nLen); y[ikpp#ozY n = nLen; zq(R !a6 } Q&p'\6~ catch(IOException e) Aw]W- fx { r!DUsE e.printStackTrace (); $JH_ } #0yU
K5J K0681_bp K,pQ11J return n; Tnw0S8M } V\C$/8v Y!M&8;> e!+_U C } HzdtR #;l~Y}7' =&kd|o/i
/* *|Cmm>z"7 **SiteInfoBean.java :?LUv:G */ _FG?zE package NetFox; ^Q)&lxlxpx &y164xn'h s\7]"3:wD public class SiteInfoBean { UOi[#L@N {+n0t1 l!6^xMhYk private String sSiteURL; //Site's URL uif1)y`Q$C private String sFilePath; //Saved File's Path =!@5! private String sFileName; //Saved File's Name gO{XD.s private int nSplitter; //Count of Splited Downloading File Re`'dde= hj~nLgpN I-=H;6w7 public SiteInfoBean() jrOqspv {//nSplitter的缺省值为5 *)+K+J //default value of nSplitter is 5 /hx|KC&:e this("","","",5); '?WKKYD7N } #!a}ZhIt fu}ZOPu VeLuL:4I public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) 6jdNQC$#B { =Zg%& J sSiteURL= sURL; ;@I4[4ph} sFilePath = sPath; ^xB=d S~ sFileName = sName; Gw\-e;, this.nSplitter = nSpiltter; 3&'u7e STfcx]L _{d0Nm } r`t|}m @qszwQav$ TB!z:n public String getSSiteURL() _[eAA4h { ;r**`O return sSiteURL; L=Pz0 } 3,x|w 3,Dc}$t o.)8A8 public void setSSiteURL(String value) s>A!Egmo { ;QRnZqSv sSiteURL = value; SHc<`M'+ } #osP"~{
%Ls5:Z= %xa.{`}`U public String getSFilePath() GI]sE]tZ { XOk0_[ return sFilePath; x/Nh9hh" } ]HpKDb0+ \(S69@f -#9Hb.Q; public void setSFilePath(String value) }"V$li { &}YJ"o[I sFilePath = value; Py&DnG'H } 'G6M:IXno @|N'V"*MT #u<^ public String getSFileName() ;w\7p a { UUE:>[, return sFileName; c^4^z"Mo` } ,wyfMOGLt X {["4 Y,?!" public void setSFileName(String value) CG`s@5y>5 { __F?iRrCM sFileName = value; G`a,(<kT; } 9;fyC= C4Tn
p "J^ public int getNSplitter() T7wy{; { Lc0U-!{G return nSplitter; [<2#C#P:6 } BdK2I!mm xK8n~.T(' n$jOk
|W public void setNSplitter(int nCount) MS_@
Xe { E[z8;A^:0 nSplitter = nCount; B4/0t:^I } ?iX1;c9 } AGH7z tHvc*D HQpw2bdy /* u:6PAVW? **Utility.java li U=&wM> */ 5|4=uoA< package NetFox; stb)Tl^ Ql%0%naq1 h{$mL#J public class Utility { Vy+%sG
q" 4 ^=qc99 X2Z
E9b public Utility() yq?7!X {
R%(ww C4#E N} JTK0#+? } rO_|_nV[ fs43\m4=m //线程睡眠 j-?zB.jAh public static void sleep(int nSecond) %XpYiW#AK { %(9BWO try{ wFgL\[$^| Thread.sleep(nSecond); SP&Y|I$: } wR x5` @ catch(Exception e) 3?}W0dZ$d { X5(S+;v"^ e.printStackTrace (); ^/)!)=? } l7.W2mg } Eyv|~D &TpzJcd" //日志 34@f(^d+^ public static void log(String sMsg) bZ/4O*B { Cb{n4xKW6 System.err.println(sMsg); fnZa IV=H } \:ELO[(#|{ 'CrBxaA]s &$'=SL(Z public static void log(int sMsg) LC!ZeW35 { |o:[*2- System.err.println(sMsg); .^?^QH3 } #rE#lHo } DeMF<)# HjX!a29Wf *\UxdL 22 /* [lSQ? **TestMethod.java Uf:G,%OYi */ V4('}Q! package NetFox; +
lha= Bn[5M[ F(-1m A&- public class TestMethod { ?q68{!{bi U?MKZL7 208 dr*6U public TestMethod() oic}Go { ///xx/weblogic60b2_win.exe m4U7{sE try{ G)I lkA@ SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); ,O9rL :? //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); AYC22( SiteFileFetch fileFetch = new SiteFileFetch(bean); q=o"]
6 fileFetch.start(); OT&mNE4 } X(b"b:j' catch(Exception e){e.printStackTrace ();} E!a5-SrR tRqg')y 2n9E:tc } <lx~/3<m [M^ur%H UE3#(:xA public static void main(String[] args) Dn[iA~ { F-^#EkEGe new TestMethod(); b&Dc DX } jY]hMQ/H } uq}>5 点击下载更多相关资料
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