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/* "i W"NFO **SiteFileFetch.java 4x[S\,20 */ ~gRf:VXX=_ package NetFox; 2P{Gxz<# import java.io.*; T:W4$P import java.net.*; Jma1N;d 3>VL}Ui} >Wg hn:^ public class SiteFileFetch extends Thread { k~
/Nv=D }U5yQ%N &W6^sj*k5U SiteInfoBean siteInfoBean = null; //文件信息Bean gEE\y{y long[] nStartPos; //开始位置 x{WD;$J long[] nEndPos; //结束位置 TBU&6M>{3 FileSplitterFetch[] fileSplitterFetch; //子线程对象 rguC p}r long nFileLength; //文件长度
c=.(!qdH boolean bFirst = true; //是否第一次取文件 TT3|/zwn boolean bStop = false; //停止标志 %FI E\9 File tmpFile; //文件下载的临时信息 fIv* T[ DataOutputStream output; //输出到文件的输出流 1c{DY e'D&8z_; //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) PBkt~=j public SiteFileFetch(SiteInfoBean bean) throws IOException &H:(z4/ { t |A-9^t'! siteInfoBean = bean; WbqWG^W //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); d)f :)Ew tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); ,',o'2=! if(tmpFile.exists ()) S\!ana]) { ;cN{a& bFirst = false; [Nbm|["q~ read_nPos(); (mt k 4 } C/6V9;U else PdtvU-( { X1vd'> nStartPos = new long[bean.getNSplitter()]; j9+w#G]hV nEndPos = new long[bean.getNSplitter()]; #';:2Nyq } K~ehP[^ *N'p~LJ ysf~|r4s :y jKL^G> } ]^K4i)\ ut/=R !(K pOG1jI5<{8 public void run() yFlm[K5YD { ..'_o~Ka //获得文件长度 L"Olwwmk //分割文件 qE3UO<FA //实例FileSplitterFetch +-CtjhoS //启动FileSplitterFetch线程 |T)6yDL //等待子线程返回 =k`Cr0aPF try{ Jd^,] if(bFirst) k%QpegN { KE3;V2Ym f nFileLength = getFileSize(); >{J(>B\ if(nFileLength == -1) q\p:X"j| { 5 -RsnF System.err.println("File Length is not known!"); |f_[\&<* } b-Q>({=i else if(nFileLength == -2) =uYYsC\T { Hm'=aff6A System.err.println("File is not access!"); 6 EC* } 3/W'V,5G6 else q0r>2c-d { :~N-.# for(int i=0;i<nStartPos.length;i++) wLJ:\_Jaf { xx9 g''Q nStartPos = (long)(i*(nFileLength/nStartPos.length)); <oA7'|Bu< } 7f!YoW;1 for(int i=0;i<nEndPos.length-1;i++) y0.8A-2: { 0+ ;bh
{Eu nEndPos = nStartPos[i+1]; F Yzi~L } D}8[bWF nEndPos[nEndPos.length-1] = nFileLength; Tl[!=S }
.Blf5b } po Vx8oO8 ll.N^y;a qUGC"<W //启动子线程 RM]M@%,K fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; 22M1j5 for(int i=0;i<nStartPos.length;i++) A5R<p+t6 { K<qk.~
S fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), OJ5#4qJ[ siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), :hFIl0$,"3 nStartPos,nEndPos,i); }Nm#q@o$P Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); Xi,CV[L\ fileSplitterFetch.start(); %'7lbpy,f } @l jA // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), |G,tlchprs siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); dj7hx"BI // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", p,>5\Zre~ nEndPos = " + nFileLength); J1I ;Jgql( // fileSplitterFetch[nPos.length-1].start(); k_5L4c:" `e|0g"oP :f}9($ //等待子线程结束 Y^7$t^& //int count = 0; !1DKLQ //是否结束while循环 nv%rJy*w[ boolean breakWhile = false; EwC{R` ,3p~w5C/+[ (#Gw1 while(!bStop) IsM}'. { F{Jw^\ write_nPos(); TKY*`?ct Utility.sleep(500); uU <=d breakWhile = true; D=m9fFz Raxrb=7 f'-i o<. for(int i=0;i<nStartPos.length;i++) F6OpN"UM' { ")dH,:#S if(!fileSplitterFetch.bDownOver) 8I8
F/47x { v7jq@#- breakWhile = false; 4UlyxA~ break; 6[LM_eP } XY)&}u. } bRJMYs if(breakWhile) ?_$=l1vf break; gp^5# k*E\B@W> WD2]&g //count++; Y/>&0wj)d //if(count>4) jN>{'TqW4 // siteStop(); [t7]{d* } +!z{5: GCX G/k?w: #Jn_c0 System.err.println("文件下载结束!"); v!P b`LCqK } <2|O:G catch(Exception e){e.printStackTrace ();} =aA+~/~8% } %Nhx;{ 8V)^R(\; ~Ro9up //获得文件长度 65p?Igb public long getFileSize() V7[zAq {
,
GY h9 int nFileLength = -1; ? glSC$b try{ e~@[18 URL url = new URL(siteInfoBean.getSSiteURL()); 6morum HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); f3{MvAy[ httpConnection.setRequestProperty("User-Agent","NetFox"); n\5RAIg ("+}=*?OF3 X4t s)>"d int responseCode=httpConnection.getResponseCode(); #hf
ak if(responseCode>=400) iz?tu: \v& { O.Iu6D processErrorCode(responseCode); Z@&Dki return -2; //-2 represent access is error Xn,v]$M! } 9h%?QC }_;!hdYq *l;B\=KR String sHeader; s]mY*@a% {]_r W/
no]z1D for(int i=1;;i++) IlE_@gS8 { YoLx>8 //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); (85Fv&a //Utility.log(in.readLine()); <Ib[82PU sHeader=httpConnection.getHeaderFieldKey(i); [],1lRYI9_ if(sHeader!=null) !]fQ+ *X0g { w'fT=v) if(sHeader.equals("Content-Length")) B`o]*"xkB { E V^~eTz nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); OhmQ, break; GbA.UM~ } QgD g}\P } W4U@%b do else ^Q ps>A( break; ,4,V4 N } ]f: v,a } 6"t;gSt4 catch(IOException e){e.printStackTrace ();} 5qkH|*Z3 catch(Exception e){e.printStackTrace ();} 7 aYn0_NKp U
uM$~qf/K ZA9sTc[
g Utility.log(nFileLength); aKlUX <ggtjw S +:-57 return nFileLength; UMp/\&0 } ?EpSC&S\ XfE -fH1j %#Z/2<_ //保存下载信息(文件指针位置) zrv#Xa!O\ private void write_nPos() $DC*i-}qFg { kR@Yl Yo try{ #9fWAF output = new DataOutputStream(new FileOutputStream(tmpFile));
uV hCxUMQ output.writeInt(nStartPos.length); `)h6j)xiQ for(int i=0;i<nStartPos.length;i++) TLf9>=
OVh { {d%&zvJnD // output.writeLong(nPos); %Lrd6i_j output.writeLong(fileSplitterFetch.nStartPos); ~i_Tw#} output.writeLong(fileSplitterFetch.nEndPos); gx:;&4AD } 8dOo Q output.close(); c$,_>tcP } <U9/InN0[ catch(IOException e){e.printStackTrace ();} A[dvEb;r catch(Exception e){e.printStackTrace ();} b7\ cxgRq } u@P[Vb NHgjRPz" L~/qGDXC? //读取保存的下载信息(文件指针位置) LaIJ1jf private void read_nPos() lE
;jCN { y3;q_4. try{ ]G}B 0u3 DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); .LRxP#B int nCount = input.readInt(); !lmWb-v%36 nStartPos = new long[nCount]; @l(vYJ:f nEndPos = new long[nCount]; F'?I-jtI for(int i=0;i<nStartPos.length;i++) HFQR
;9] { zggB$5 nStartPos = input.readLong(); KZ:8[d nEndPos = input.readLong(); rba;&D; } |m?vVLq input.close(); 5[9bWB{ } 5NXt$k5 catch(IOException e){e.printStackTrace ();} OAZ#|U catch(Exception e){e.printStackTrace ();} ]Lqt(c } &?p:3%;Dr $O:w(U ?vGffMm private void processErrorCode(int nErrorCode)
0gF!!m { :Ze+%d= System.err.println("Error Code : " + nErrorCode); &Rz,
J] } I#FF*@oeM }98>5%Uv /WnE:3G //停止文件下载 w,j cm; public void siteStop() 1(GHCxA8G { F X1ZG! bStop = true; snp v z1iS for(int i=0;i<nStartPos.length;i++) `Xcirfp fileSplitterFetch.splitterStop(); 4*UP.r@ :Px\qh}K h:Ndzp{ } =j
/hl } tllBCuAe //负责部分文件的抓取 e}cnX`B **FileSplitterFetch.java )Z@-DA*Q- */ fRg=!<#% package NetFox; jV7&Y.$zF] vU/ D7 P-JfV 7(O8 import java.io.*; C@HD(..# import java.net.*; HrqF![_ 8!h'j m<3v)R[> public class FileSplitterFetch extends Thread { Ew^ @Aq
td(M#a- h K}bj String sURL; //File URL ,R-Y~+! long nStartPos; //File Snippet Start Position ^^$vR[7 long nEndPos; //File Snippet End Position DQ=N1pft2v int nThreadID; //Thread's ID mR":z|6 boolean bDownOver = false; //Downing is over D?+
RJs boolean bStop = false; //Stop identical <qiICb)~ FileAccessI fileAccessI = null; //File Access interface /?zW<QUI A1,4kqmE J/4y|8T/y public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException Plz-7fy33 { +
>sci this.sURL = sURL; TIRHT`"i this.nStartPos = nStart; zw:/!MS this.nEndPos = nEnd; r2G*!qK*1 nThreadID = id; | Odu4 Q fileAccessI = new FileAccessI(sName,nStartPos);//定位 =
?N^>zie } &?$\Y,{ ~440#kj< JY4_v>Aob public void run() ye r>
x { |qL;Nu,d while(nStartPos < nEndPos && !bStop) O=O(3Pf> {
o?R,0 - 1e$[p[ fJ :jk6@ try{ 712=rUI%! URL url = new URL(sURL); Z oTNm HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); >7FSH"8[, httpConnection.setRequestProperty("User-Agent","NetFox"); tq E>Zx=X String sProperty = "bytes="+nStartPos+"-"; &8Wlps` httpConnection.setRequestProperty("RANGE",sProperty); px&=((Z7> Utility.log(sProperty); mahi7eU
P Fi{mr*} A1!:BC InputStream input = httpConnection.getInputStream(); byj[u!{ //logResponseHead(httpConnection); zlX!xqHj
'O1.6*K &@'V\5G byte[] b = new byte[1024]; |\p5mh int nRead; pFH?/D/q while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) =w ,(M { ?HxS)Pqq nStartPos += fileAccessI.write(b,0,nRead); xucIjPi] //if(nThreadID == 1) LI$L9eNv;Y // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); 2vXGO|W } s{% fi* &x/k^p= vcD'~)G(* Utility.log("Thread " + nThreadID + " is over!"); IgiqFV{ bDownOver = true; :,=Fx</H //nPos = fileAccessI.write (b,0,nRead); \1khyF' } |x[$3R1@ catch(Exception e){e.printStackTrace ();} v7$9QVze } <lX:eR1 } @>9A$w$H|a =tP$re";o S%P3ek>3 //打印回应的头信息 Lj-{t% } public void logResponseHead(HttpURLConnection con) u>
In(7\ { d TgM"k for(int i=1;;i++) K+t];( { bAdAp W String header=con.getHeaderFieldKey(i); {C, #rj if(header!=null) ees^O{ 8 //responseHeaders.put(header,httpConnection.getHeaderField(header)); A9.;>8!u Utility.log(header+" : "+con.getHeaderField(header)); K;kLQ2) else _.hIv8V break; qFGB'mIrFz } #s/{u
RYQ } aliQ6_ )m> 6hk ="=#5C public void splitterStop() 6;[1Jz]?i { 5]Z] j[8Y bStop = true; DD)mN)
&T } )<tzm'Rc (h%|;9tF 6#/LyzZq| } xQ_:]\EZ >dcqPNDg1^ xg4T` ]) /* 9O2a |
d **FileAccess.java )OS>9
kFH *//文件访问(定位,写) FK?mS>G6 package NetFox; re2Fv:4{ import java.io.*; Zt7hzW ?cA8P.?^A vC s6#PR$ public class FileAccessI implements Serializable{ K7y!s :rg! [k}dES# //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 `8qT['`#R RandomAccessFile oSavedFile; oT$(<$&< long nPos; Bl:{p>-q ]Sk#a-^~ 7v.#o4nPK public FileAccessI() throws IOException DHSU?o#jY { :K!GR this("",0); Uv#>d}P } :H~UyrN dY4 8S{ xop-f#U* public FileAccessI(String sName,long nPos) throws IOException UA1]o5K { {-:4O\/ oSavedFile = new RandomAccessFile(sName,"rw"); " {,\]l&o this.nPos = nPos; 9;r48)5 oSavedFile.seek(nPos); )UxQf37 } f]{1ZU%4 !-
Cs? )F=JkG public synchronized int write(byte[] b,int nStart,int nLen) d"QM;9 { H'j_<R N int n = -1; g]oc(RM try{ ^\Ue7,H- oSavedFile.write(b,nStart,nLen); U4
go8 n = nLen; |>jqH @\P } ;C7BoHB9 catch(IOException e) FB?q/ _ { [esX{6,i e.printStackTrace (); 1( QWt } &Sa_%:*D( +8?R+0P GgZEg
?@ return n; c,{& } fwar8
i1 &-=G9sb, A>ug'. } *_<SWTE xIq"[?m Lv`8jSt\ /* `W.vW8!# **SiteInfoBean.java 0k .# */ >qh>Qm8w package NetFox; Y3sNr)qss :_I
wc= CguU+8]
public class SiteInfoBean { d=c1WK %Hl:nT2M m;$F@JJ private String sSiteURL; //Site's URL o0-fUCmC private String sFilePath; //Saved File's Path KNUMz4 private String sFileName; //Saved File's Name /o}0oo5B private int nSplitter; //Count of Splited Downloading File +Y>cBSO
5K_N GakmROZ@9 public SiteInfoBean() f;_K}23 {//nSplitter的缺省值为5 oto
wvm //default value of nSplitter is 5 EFT02#F_f this("","","",5); jmZ|b6 } #4|i@0n}D O. .@<. !m/Dd0 public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) =^%Pwkz { ^r?sgJ sSiteURL= sURL; ;?Y`e sFilePath = sPath; "*H'bzK sFileName = sName; ]J"+VZ_"I this.nSplitter = nSpiltter; 9DP75 ti Pc\4QvQ8 51FK~5 } U
K]{ ]- uN?O*h/( JQvQm|\nc public String getSSiteURL() VdN+~+A: { {bq-: CZe return sSiteURL; oJz:uv8Pe. } QWQ6j#` Q1>Op$>h 5M.n'* public void setSSiteURL(String value) f'?6D+Yw~ { 7`'fUhB! sSiteURL = value; %>*0.)wG } 1{fwr1b S|5lx7 Xk9r"RmiOb public String getSFilePath() 4Xb}I;rM { gm%bxr@X~ return sFilePath; Q17o5##x7 } 1 0Tg> H 3S2p:\] =g>7|?6>= public void setSFilePath(String value) Qd)cFL"v { HZQ3Ht 3Vh sFilePath = value; ~9ls~$+* } OTjryJ^ YPJx/@Z` $}"Wta public String getSFileName() `F`'b) { o B}G^t return sFileName; -D^y)
} sN`o_q{Q Y`_X@Q GWE0 UO} public void setSFileName(String value)
'jl XLb { aKFA&Xnsl sFileName = value; |>fS"u } 2P>za\ 5Yibv6:3a F p=Q$J| public int getNSplitter() C-b% PgA { Y>!W&Gtu return nSplitter; v+_Y72h*a } 58ZiCvqv TdOWdPvYj yt#;3 public void setNSplitter(int nCount) xgw)`>p,W { 5z mHb nSplitter = nCount; ?g#t3j>zoF } ~5dq5_ } G y7x? 8q[WfD cb&In<q /* 92ww[+RQ@ **Utility.java Saq>o. */ nVA'O package NetFox; \#c+vfq 6uE1&-:L dC|#l?P public class Utility { |}.B!vg(4 }uj'BO2? ~g6[ [ public Utility() h_"/@6 { R6o<p<fTh ewPd hCK rd~W.b_b } kAQ Zj3P] &Zy=vk* //线程睡眠 $ttr_4= public static void sleep(int nSecond) :=7;P) { /1
%0A try{ CKw)J}z Thread.sleep(nSecond); QjbPBk Q } vszAr(
t catch(Exception e) Y]0y
-H { yk6UuI^/ e.printStackTrace (); g' U^fN } 7%}}m&A7h } 717m.t,x T mE4p //日志
3YF]o9 public static void log(String sMsg) zQfxw?~A { m;1e xa System.err.println(sMsg); H
pfI } rmoEc]kt] /k Vc7LC v@SrEmg public static void log(int sMsg) 5E(P,!-. { oob0^}^ System.err.println(sMsg); ," R_ve } FJiP>S[] } \{mJO>x rqo<Xt` Db:WAjU /* \~1+T **TestMethod.java He23<hd! */ P6'I:/V package NetFox; bcs(# ^/,yZ: 7[ji,.7 public class TestMethod { AtYYu =Bx~'RYl1d pU/.|Sh public TestMethod() DZZt%n8J { ///xx/weblogic60b2_win.exe ( mMz]b5 try{ }H.vH SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); ,FO|'l //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); |sAg@kM SiteFileFetch fileFetch = new SiteFileFetch(bean); __npX_4%S fileFetch.start(); !IU*Ayg } ?J-KB3Uv3 catch(Exception e){e.printStackTrace ();} -lEh}r N `MQHQ1 J6P
Tkm}^ } 'M/&bu r 9$i`B>C~ A/aQpEb% public static void main(String[] args) 0<k!F3= { ^f]pK&MAmN new TestMethod(); .ji%%f } #Xly5J } +(0eOO'\M 点击下载更多相关资料
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