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/* Jm3iYR+, **SiteFileFetch.java 3M[5_OK */ ktiC*|fd package NetFox; K~
VUD( import java.io.*; _j?/O)M
c import java.net.*; }>?"bcJ k2DBm q; 4Dv42fO public class SiteFileFetch extends Thread { a WMEo`O% J-Wphc!m J0yo@O SiteInfoBean siteInfoBean = null; //文件信息Bean AjMx \'(C long[] nStartPos; //开始位置 S*a_ long[] nEndPos; //结束位置 $qk(yzY FileSplitterFetch[] fileSplitterFetch; //子线程对象 CDGN}Q2 _ long nFileLength; //文件长度 8EAkM*D w boolean bFirst = true; //是否第一次取文件 ?Q/9aqHe; boolean bStop = false; //停止标志 0
hS(9y40 File tmpFile; //文件下载的临时信息 Jtl[9qe#] DataOutputStream output; //输出到文件的输出流 8\rHSsP Ks.kn7<l //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) LYp=o8JW| public SiteFileFetch(SiteInfoBean bean) throws IOException "hXB_73)V { ]`}R,'P siteInfoBean = bean; WHvxBd //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); e]u3[ao tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); QVQ?a&HYS if(tmpFile.exists ()) ZH=oQV)6 { 28d=-s=[ bFirst = false; y%xn(Bn read_nPos(); dS"%( ?o } ntEf-x< else {9YNv<3 { }~$96|J nStartPos = new long[bean.getNSplitter()]; NTL`9b nEndPos = new long[bean.getNSplitter()]; ccJ!N } y3pr(w9A .RxAYf| [9xUMX^} EFS2 zU } ^FN(wvqb8 ypsT:uLT #ZPy&GIr public void run() ee{8C~ { O;~dao //获得文件长度 Pdw[#X<[` //分割文件 . [5{ //实例FileSplitterFetch "jEf$] //启动FileSplitterFetch线程 'U3+'du^8 //等待子线程返回 w65D;9/; try{ 3*$)9' if(bFirst) nK5FPFz8 { &[4lP~ nFileLength = getFileSize(); K(B|o6[ if(nFileLength == -1) gv,8Wo { :,BKB*a\ System.err.println("File Length is not known!"); }dO^q-t$3 } 4]3(Vyh` else if(nFileLength == -2) 0s8w)%4$ { ZdY)&LJ System.err.println("File is not access!"); "Rv],O" } -% Z?rn2 else 8m;tgMFO { kZ3w 2=x3v for(int i=0;i<nStartPos.length;i++) l:H}Y3_I { Ff@Cs0R nStartPos = (long)(i*(nFileLength/nStartPos.length)); and)>$)| } L.) 0!1 for(int i=0;i<nEndPos.length-1;i++) +$H`/^a. { J)leRR& nEndPos = nStartPos[i+1]; )Y}8)/Pud } GV T[)jS nEndPos[nEndPos.length-1] = nFileLength; 7;;HP`vY } {@w!kl~8 } G@Y!*ZH*f _}(ej&'f E/_I$<,_y //启动子线程 XUp'wP fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; zVU{jmS for(int i=0;i<nStartPos.length;i++) 1y($h< { /vLdm-4 fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), N9A#@c0O siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), 0xQ="aXE nStartPos,nEndPos,i); t\%gP@? Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); /"%(i#<)xs fileSplitterFetch.start(); "`4V^1 } bI"_hvcFp // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), \ tx4bV# siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); 3/q)%Z^= // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", QBI;aG<+b> nEndPos = " + nFileLength); ,aBo
p# // fileSplitterFetch[nPos.length-1].start(); >=Pn\"j :v>Nz7SB t}]R0O.s //等待子线程结束 .V Cfh+*J# //int count = 0; ^yo~C3r~ //是否结束while循环 >MeM boolean breakWhile = false; n6Qsug$z _rU%DL? X|w[:[P while(!bStop) mWPA]g( { l@OY8z-_ write_nPos(); wfXm(RYM Utility.sleep(500);
nW*D breakWhile = true; E 'O[E= zZax![Z t+?m<h6w;l for(int i=0;i<nStartPos.length;i++) 7A mnxFC { F$k^px if(!fileSplitterFetch.bDownOver) ?'$Yj>R6 { @ysc?4% q breakWhile = false; awic9uMH break; BQ7p<{G } H]x-s }
/$ : w8 if(breakWhile) )Z0bMO< break; *VPjBzcH R@8pKCL. dRD t.U!T //count++; b&j}f //if(count>4) RU_wr< // siteStop(); 9_ } +xc1cki_{ 0<";9qN)6 (q]_&%yW System.err.println("文件下载结束!"); |r%NMw #y } (Iz$_( catch(Exception e){e.printStackTrace ();} =h
Lw1~ } +-*Ww5Zti Jb (CH4|7 !RD<" //获得文件长度 3\B28m public long getFileSize() 4ru-qF { ;qN;oSK int nFileLength = -1; cfP9b8JG try{ QU;bDNq,c URL url = new URL(siteInfoBean.getSSiteURL()); qG<3H!Z!ky HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); Lq6R_udp httpConnection.setRequestProperty("User-Agent","NetFox"); UqwU3 CVy\']
nde_%d$ int responseCode=httpConnection.getResponseCode(); W Y] if(responseCode>=400) ~stJO]) a { $,)PO
Z processErrorCode(responseCode); IGQcQ/M return -2; //-2 represent access is error j*'+f~A } p"UdD L<62-+e` o<8('j
String sHeader; l3O!{&~K <1%(%KdN[ Z.l4< for(int i=1;;i++) S<Os\/* { w$##GM=Tq //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); A 6IrA/b //Utility.log(in.readLine()); bQlv b sHeader=httpConnection.getHeaderFieldKey(i); g]Jt (aYK if(sHeader!=null) @?vC4+' { R9z:K_d, if(sHeader.equals("Content-Length")) p.^qB]% {
B8~JUGD nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); X;&Iu{&= break; <c77GimD? } QB.QG!@ } K!,T.qA&= else rLpfybu break; NxW
Dw } ki6Lt } YEPQ/Pc catch(IOException e){e.printStackTrace ();} ZO#f)>s2 catch(Exception e){e.printStackTrace ();} E#!tXO&, kfV}ta'^S .<Rw16O Utility.log(nFileLength); qeUT]*
w QJ,[K_ 5(=5GkE)> return nFileLength; 9,wD } 4^Y{ BS fF e~U]yg5X- ZQk!Ia7 //保存下载信息(文件指针位置) M
'#a.z% private void write_nPos() T T@U_^o { _1,hO?TK try{ +6`+Q2qi output = new DataOutputStream(new FileOutputStream(tmpFile)); fg)VO6Wo& output.writeInt(nStartPos.length); ?:42jp3 for(int i=0;i<nStartPos.length;i++) T!7B0_ { x fa- // output.writeLong(nPos); ?Gl]O3@3 output.writeLong(fileSplitterFetch.nStartPos); "qrde4O output.writeLong(fileSplitterFetch.nEndPos); S"4eS,5L| } @xXVJWEU: output.close(); nZ'-3 } awv$ }EFo catch(IOException e){e.printStackTrace ();} `FGYc catch(Exception e){e.printStackTrace ();} {sfA$ d0 } vh#81}@N7* 4iI4+ :pfLa2f+ //读取保存的下载信息(文件指针位置) ?Kt F!:_C private void read_nPos()
=(]Z%Q-V { @jxP3:s try{ Rb!y(&>v DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); F)Iz: int nCount = input.readInt(); @C|nc&E2s nStartPos = new long[nCount]; ObfRwZh?q nEndPos = new long[nCount]; w^"IR for(int i=0;i<nStartPos.length;i++) v YJ9G"E { ;_=N
YG. nStartPos = input.readLong(); PU,%Y_xR nEndPos = input.readLong(); UCt}\IJ } /go|r ' input.close(); 6CCm1F{` } AP1&TQ,& catch(IOException e){e.printStackTrace ();} rQxiG[0 catch(Exception e){e.printStackTrace ();} "<"m}rE?Q } e }Mf r7,}"Pl e\em;GTy private void processErrorCode(int nErrorCode) B<Q)z5KK { 0NeIQr1N_ System.err.println("Error Code : " + nErrorCode); *`q?`#1&&. } ", p5}}/ %tMx48'N lSg[7lt //停止文件下载 !:PiQ19
'u public void siteStop() -.Blj<2ah { _%[po%] bStop = true; YF)]B |I for(int i=0;i<nStartPos.length;i++) mqj-/DN6* fileSplitterFetch.splitterStop(); ~Pj q3etk (3"N~\9m %.m+6
zaF } ZTibF'\5N } D4b-Y[/" //负责部分文件的抓取 VV{>Kq+&,v **FileSplitterFetch.java RA!q)/+ */ /5<= m: package NetFox; 8t3m$<7 <.mH-Y5i 9Ta0Li import java.io.*; dU#-;/}o import java.net.*; CLTkyS)C ;=7K*npT V)5K/ U{ public class FileSplitterFetch extends Thread { rlaeqG W6Mq:?+ D '4nJ*Xa String sURL; //File URL D#AqZS>B long nStartPos; //File Snippet Start Position Q~tXT_ long nEndPos; //File Snippet End Position m8=n `XI int nThreadID; //Thread's ID ?=ffv]v| boolean bDownOver = false; //Downing is over J#48c' boolean bStop = false; //Stop identical >.6|\{*sG FileAccessI fileAccessI = null; //File Access interface p#CjkL z&WtPSyGj 2E?!Q I\O public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException
[}YUi>NGA { @ 5^nrB this.sURL = sURL; -OSj<m< this.nStartPos = nStart; ^DN:.qQ this.nEndPos = nEnd; 8L,=E ap nThreadID = id; FieDESsX> fileAccessI = new FileAccessI(sName,nStartPos);//定位 >MGWN } c}+*$DeT *5 +GJWKN g@37t @I public void run() <|3%}? { P`ou:M{8 while(nStartPos < nEndPos && !bStop) .%s
U)$bH { ~ney~Pz_ x ZP*%yM +Q[uq!<VJk try{ L;*
s-j6y URL url = new URL(sURL); NNF"si\FE HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); K8aqC{ httpConnection.setRequestProperty("User-Agent","NetFox"); *68 TTBq( String sProperty = "bytes="+nStartPos+"-"; #]x3(}3W httpConnection.setRequestProperty("RANGE",sProperty); *X(:vET Utility.log(sProperty); X%+lgm+ R!%nzL@e&`
0_eqO'" InputStream input = httpConnection.getInputStream(); mwo:+^v( //logResponseHead(httpConnection); !(rAI QXZyiJX} `XhH{*Q"X byte[] b = new byte[1024]; qx'0(q2Ii( int nRead; c7jmzo while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) X+C*+k,z { a8f#q]TyQ nStartPos += fileAccessI.write(b,0,nRead); |82q|@e //if(nThreadID == 1) F?|Efpzow? // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); HJ]xZ83pC } W|7|XO ? Bpnnwx a(|6)w- Utility.log("Thread " + nThreadID + " is over!"); @^<odmM bDownOver = true; 1>OlBp //nPos = fileAccessI.write (b,0,nRead); R(d<PlZ } J(l\VvK catch(Exception e){e.printStackTrace ();} st;iGg } wX0D^)NtF } N<9 c/V @"@|O>KJ
x%l(0K //打印回应的头信息 2ZY$/ public void logResponseHead(HttpURLConnection con) 68XJ`/d { 0&UG=q for(int i=1;;i++) }6@E3z]AMO { 8f9wUPr String header=con.getHeaderFieldKey(i); 2%sZaM if(header!=null) `qc"JB //responseHeaders.put(header,httpConnection.getHeaderField(header)); NX&dJ
6a Utility.log(header+" : "+con.getHeaderField(header)); m ol,iM*l else rx2)uUbR break; TQ]gvi|m } Z)s
!p } gz~oQ
l)zJ J'}+0mln '4 *0Pw public void splitterStop() 9wYm(7M6 { ,`}yJ*7 bStop = true; 7|5kak>= } A0<g8pv zMv`<m% Rn~'S2`u } ;k!.ey$S g8Ex$,\, \J+a7N8m, /* ,`bW(V **FileAccess.java |M;Nq@bRv *//文件访问(定位,写) ?>;aD package NetFox; G'\[dwD,u import java.io.*; ^3dc#5]Xf Mt4 ,Vi_~b public class FileAccessI implements Serializable{ :qdyCsn2 6\.g,>
//RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 Gd
4S7JE RandomAccessFile oSavedFile; p& _Z}Wv long nPos; n+8YTjd 1Vy8eI`4 LO_Xrj public FileAccessI() throws IOException uVqc:Q" { jlBsm'M<m this("",0); M7/5e3 } NCKR<!( D,cD]tB2 v@{y} public FileAccessI(String sName,long nPos) throws IOException Xex7Lr& { X%YZQc9 oSavedFile = new RandomAccessFile(sName,"rw"); `,V&@}&"n this.nPos = nPos; }ppApJT oSavedFile.seek(nPos); !
v![K } b$'%)\('g 5;XC!Gz %$&eC public synchronized int write(byte[] b,int nStart,int nLen) BbX$R`f { -9om,U`t int n = -1; Tv|'6P try{ }ekNZNcuM oSavedFile.write(b,nStart,nLen); k M/:n n = nLen; 0kUhz\"R:q } w~+*Vd~U catch(IOException e) D+!T5)>( { K}cZK e.printStackTrace (); &>c=/]Lop } 7**zb"#y j0L%jz (')t>B1Z return n; s]m]b#1!r } %72# tY (Iv@SiZf( ~aotV1"D } #X)DFAtb 9BakxmAc ,O:4[M !$w /* ()|e
xWW **SiteInfoBean.java YHN6/k7H */ f4S}Nga( package NetFox; oT}$N_gFT d[h=<?E5 efyEzL public class SiteInfoBean { >(2;(TbQm0 q}_8iDO6 OkRb3} private String sSiteURL; //Site's URL
2po8n_ private String sFilePath; //Saved File's Path EZWWvL private String sFileName; //Saved File's Name bzG vnaTt private int nSplitter; //Count of Splited Downloading File J)g
+I :30daKo |~76dxU public SiteInfoBean() I_B%F#X) {//nSplitter的缺省值为5 IYe[IHny1 //default value of nSplitter is 5 &DQ_qOKD this("","","",5); [p4([ef
' } rv{ Wti[ s {*rBX8N -n@,r%`UK public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) t,Tq3zB { =>S[Dh sSiteURL= sURL; v1$}[&/ sFilePath = sPath; \&d1bq sFileName = sName; lGet)/w;c this.nSplitter = nSpiltter; ]#N8e?b, ;-i)}< vo#$xwm1 } \ $TM=Ykj T pCXe\W rE"FN~9P public String getSSiteURL() <DMm
[V{ { l )r^|9{ return sSiteURL; 0]ai*\,W7~ } sfVzVS[ `_&vvJPn@! K
z^.v` public void setSSiteURL(String value) "'+/ax[{ { A/ zAB3 sSiteURL = value; M\ wCZG }
rhF2U Ozqh Jb D{7sfkcJ public String getSFilePath() N/C$8D34 { #x;d+Q@ return sFilePath; An]Vx<PD } = m|<~t 2n"-~'3\ dM"5obEb public void setSFilePath(String value) ,H|K3nh { pw))9~XU sFilePath = value; u$qasII } VaonG]Ues ;Zf7|i`R3 <'T DOYb public String getSFileName() 9AWP`~l` { ']!wc8m1" return sFileName; [$6YPM>Ee } ;Gp9
? 0 2*W|s7cc uKY1AC__ public void setSFileName(String value) L{ej<0 yr { IM,d6lN6s sFileName = value; >z3l@ } nr>Yj?la 0#5&* ZXj*Vu$_4 public int getNSplitter() -f'&JwE0= { [:izej(\ return nSplitter; v)vogtAQa } K6F05h 5S t[HsqnP pgUjje># public void setNSplitter(int nCount) *>GRU8_} {
%U[H`E nSplitter = nCount; B<|Vm.D } 5IgO4 <B } 6!6R3Za$ TCgW^iu {iQ4jJ`n /* \+
Ese-la **Utility.java |]HA@7B */ +Lr`-</VF package NetFox; Eg4&D4TGp Q*f0YjH! Rto/-I0l public class Utility { xgsEe3| /+<G@+( T7Y+ WfYh public Utility() $|@-u0sv { ;iN[du 1yS:` '^Q$:P{G? } *\0h^^|@ x9]vhR/av //线程睡眠 A0ZU #"'/ public static void sleep(int nSecond) ASSe;+yp { X=jD^"- try{ fG@]G9Z Thread.sleep(nSecond); ]P_yN:~ } zq$0 ?vGd catch(Exception e) bdBLfWe { ;e2D} e.printStackTrace (); .8|"@ } qP9`p4c8i } xjYH[PgfX O^~nf% //日志 a0k/R<4 public static void log(String sMsg) q:wz!~(> { (AG((eV System.err.println(sMsg); &jrc] } 7a4Z~r27/ 8qUNh# t#!AfTY$w public static void log(int sMsg) .|:R#VW { 4`sW_
ks System.err.println(sMsg); `Gg,oCQg } 5p7i9"tgn } KO))2GET e[QEOx/-h2 HSACaTVK /* /W{^hVkvC **TestMethod.java w,1*dn */ XCGK&OGI package NetFox; 0Fs2* FS "JgwL_2 _Q*,~ z~ public class TestMethod { MdnapxuS FW4#/H rj29$d?Y9 public TestMethod() rLp0)Go { ///xx/weblogic60b2_win.exe <.
V*]g/; try{ ~T=a]V SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); \O*W/9
+ //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); :?gp}. SiteFileFetch fileFetch = new SiteFileFetch(bean); %y+v0.aWH+ fileFetch.start(); Q^'xVS_. } Om8Sgy? catch(Exception e){e.printStackTrace ();} 3[R[`l]v? \mFgjPz H96|{q= } Jb|dpu/e k7nke^,| cj|Urt public static void main(String[] args) EiPOY' { C jz(-018 new TestMethod(); nKch:g } ?0d#O_la3 } }gQnr;lv 点击下载更多相关资料
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