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/* JL4E` **SiteFileFetch.java ,iYhD-"' */ WA2NjxYz package NetFox; *DIY;)K import java.io.*; 1Z
~C3)T= import java.net.*; |9XoRGgXU JYWoQ[ZO#> B](R(x>L public class SiteFileFetch extends Thread { 3:xx:Jt 4*Hzys[{ &S
xF"pYV SiteInfoBean siteInfoBean = null; //文件信息Bean l F64g long[] nStartPos; //开始位置 Ub
f5: long[] nEndPos; //结束位置 odca? FileSplitterFetch[] fileSplitterFetch; //子线程对象
}&+,y<> long nFileLength; //文件长度
#C }+ boolean bFirst = true; //是否第一次取文件 dBA&NW07 boolean bStop = false; //停止标志 w/
~\NI File tmpFile; //文件下载的临时信息 Q4 &P\V DataOutputStream output; //输出到文件的输出流 >"IG\//I
kntY2FM //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) y@v)kN)Y9\ public SiteFileFetch(SiteInfoBean bean) throws IOException w tGS"L { Fc[vs52 siteInfoBean = bean; 517"x@6Q //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); >}f!. i tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); dH5*% if(tmpFile.exists ()) oJNQdW[ { YGPb8! bFirst = false; rAtCG1Vr read_nPos(); ?8kFAf~ } ?J+jv else 9=$pV== { JtY$AP$ nStartPos = new long[bean.getNSplitter()]; sg-^ oy*^ nEndPos = new long[bean.getNSplitter()]; /-!Fr:Ox> } O)V;na &8f/ 6dq h-"q <eY" *=B<S/0 } e.L&A| 4Ia'Yr ,<+:xl public void run() }l+_KA { |LJv* //获得文件长度 @TW:6v` //分割文件 v&G9HiH //实例FileSplitterFetch ,&3+w~Ua //启动FileSplitterFetch线程 Y(`Bc8h //等待子线程返回 *YH!L{y try{ l'[;q ' if(bFirst) cQLPgE0 { ~pp<
T nFileLength = getFileSize(); q&[G^9 if(nFileLength == -1) i[LnU#+ { ~M*
UMF^ System.err.println("File Length is not known!"); }R}M>^(R4 } L"vk ^>E6 else if(nFileLength == -2) KM)MUPr { IAkQR0fcN
System.err.println("File is not access!"); ~sn3_6{ } [u*7( 4e else #t1? *4.p { jtfC3E,U for(int i=0;i<nStartPos.length;i++) ~0024B[G { :(OV{ u nStartPos = (long)(i*(nFileLength/nStartPos.length)); xcl;~"c* } nm\f$K>Pg for(int i=0;i<nEndPos.length-1;i++) ?>ZrdfTwz, { C$q-WoTM( nEndPos = nStartPos[i+1]; c]VK%zl } Ow1+zltgj- nEndPos[nEndPos.length-1] = nFileLength; .$d:c61X } :T PG~`k( } %r6_['T jQz^)8)B 1Zk1!> ? //启动子线程 %#4;'\'5 fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; G,Yctv for(int i=0;i<nStartPos.length;i++) B^/Cx { _}\KC+n8 fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), HW_2!t_R siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), | 9 *$6Y nStartPos,nEndPos,i); wrCV&2CG Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); bZK`]L[ fileSplitterFetch.start(); GRL42xp'*D } xzMpT ZQ // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), $hk_v~zM siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); nf_(_O= // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", LM"b% nEndPos = " + nFileLength); N8r+Q%ov // fileSplitterFetch[nPos.length-1].start(); "lA$;\& e6jdSn <;b //等待子线程结束 @$QtY(a //int count = 0; e6gj'GmY //是否结束while循环 -jTK3&5 boolean breakWhile = false; @*T8> w+%p4VkA<r z} VCiS0 while(!bStop) fB; o3!y { E9 #o0Di write_nPos(); .$G^c Utility.sleep(500); blbzh';0} breakWhile = true; /oM&29 jy ER]C;DYX z"sv,W for(int i=0;i<nStartPos.length;i++) X~; *zYd5 { lQ.3_{"s if(!fileSplitterFetch.bDownOver) 7BA9zs392 { OJcI0(G breakWhile = false; V3pn@'pr break; Z q}Cl'f } +w3k_^X9c } =)6|lz^ if(breakWhile) C\[g>_J break; }<P%W~ s.}:!fBk !%C&hH\ //count++; 9VTE?, //if(count>4) ##NowO // siteStop(); E"H> [E } @2$iFZq~ Lr(wS { Q#$dp System.err.println("文件下载结束!"); V:4($ } 5HbPS%^. catch(Exception e){e.printStackTrace ();} Vuo 8[h> } {[B` q [SLBA_d P\|i<Ds_M //获得文件长度 }"chm=b public long getFileSize() F
a'2i< { w.0]>/C int nFileLength = -1; h5#V,$ try{ le`_ URL url = new URL(siteInfoBean.getSSiteURL()); gI~jf- w HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); G9\@&= httpConnection.setRequestProperty("User-Agent","NetFox"); lhV'Q]s@6 .7GAGMNS d `+cNKf int responseCode=httpConnection.getResponseCode(); _9zydtw if(responseCode>=400) u%Yr&u { qg@Wzs7c~ processErrorCode(responseCode); )%5T*}j return -2; //-2 represent access is error s*pgR=dZZ } h|'T'l&z IC7S
+v #6<9FY# String sHeader; ]hkway Z)zmT%t {utIaMb]&v for(int i=1;;i++) M%2F7 FY { !23#Bz7 //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); ]LhNP}c //Utility.log(in.readLine()); nMHs5'_y sHeader=httpConnection.getHeaderFieldKey(i); Y;'7Ek) if(sHeader!=null) U8KEg)Msk { k/#& ]8( if(sHeader.equals("Content-Length")) ~m56t5+uw { U= PG0 nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); f[/E $r99J break; ;0 VE* } ;2;Kq)j_= } M-df Gk else \/9uS.Kw break; 29#;;n}p } daZY;_{"o } 7Jm9,4] catch(IOException e){e.printStackTrace ();} lLT;V2=osX catch(Exception e){e.printStackTrace ();}
:RW0< \TrhJ ~WJEH# Utility.log(nFileLength); B/Lx, _6
~/`_(KP vxo iPqo return nFileLength; J,E'F!{ } &6E^<v?] Gu:aSb "rr,P0lgX //保存下载信息(文件指针位置) |!)3[<. private void write_nPos() g9;}?h { }_L@CpG try{ v:<UbuJw output = new DataOutputStream(new FileOutputStream(tmpFile)); KPUc+`cN% output.writeInt(nStartPos.length); &k?Mt#J for(int i=0;i<nStartPos.length;i++) (6G5UwSt { RCq_FY // output.writeLong(nPos); KutR l$, output.writeLong(fileSplitterFetch.nStartPos); ;Q2p~-0Q output.writeLong(fileSplitterFetch.nEndPos); wYS,|=y } QO)Q%K, output.close(); 16YJQ ue } &Fl^&&1C catch(IOException e){e.printStackTrace ();} zTP3JOe( catch(Exception e){e.printStackTrace ();} l
49)Cv/ } 4y+]V~p mMw&{7b: AtA}OY]D/ //读取保存的下载信息(文件指针位置) c;ELAns> private void read_nPos() y?M99Vo4? { Q<r O5 -K try{ d7u"Z5t DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); =1%3".
"n@ int nCount = input.readInt();
8KW}XG nStartPos = new long[nCount]; %?C{0(Z{ nEndPos = new long[nCount]; g R(*lXm5w for(int i=0;i<nStartPos.length;i++) Sj}@5 X6 C { y^:g"|q nStartPos = input.readLong(); >'8.>f nEndPos = input.readLong(); 1DGVAIcD } ~/hP6* input.close(); -X
Bh\w } 7k:}9M~ catch(IOException e){e.printStackTrace ();} ?PSm)
~Oa catch(Exception e){e.printStackTrace ();} rBkf @ } Q4Q*5> 'j!7
O+7y 6pQ#Zg()vp private void processErrorCode(int nErrorCode) ^[8e|,U { ^ow[XEB% System.err.println("Error Code : " + nErrorCode); X{ZBS^M } >GgX-SZ% r 06}@ 7 )D@1V=9, //停止文件下载 BJk\p.BVN public void siteStop() 6A/Nlk. { Zcz)FP# bStop = true; ^gh/$my; for(int i=0;i<nStartPos.length;i++) [cru+c+O: fileSplitterFetch.splitterStop(); 4fZ$&)0& ;vF8V`f "a6
wd } }O@S;[v
S } wr8n*Du //负责部分文件的抓取 %dS7u$Rnh **FileSplitterFetch.java (ZjIwA9> */ ?Gj$$IAe package NetFox; 3b{8c8N^ @=b0>^\m As1Er[> import java.io.*; klKAwC Q, import java.net.*; /%rbXrR4w czb(&>< {`KgyCW: public class FileSplitterFetch extends Thread { PQXyu1 lyIstfRh15 -Z<e`iFQS String sURL; //File URL McxJ C< long nStartPos; //File Snippet Start Position 23y7l=.b/ long nEndPos; //File Snippet End Position :4<+)r26 int nThreadID; //Thread's ID nV
McHN boolean bDownOver = false; //Downing is over Q{H88g^=J boolean bStop = false; //Stop identical Cr4shdN34 FileAccessI fileAccessI = null; //File Access interface }`IN5NdYp c$?qN&X_K eP'e_E public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException Nt&}T { R/b)h P~ this.sURL = sURL; FI*.2rdSR this.nStartPos = nStart; \"_;rJ{!aE this.nEndPos = nEnd; 5cxA,T nThreadID = id; } ~=53$+ fileAccessI = new FileAccessI(sName,nStartPos);//定位 \Q*3/_}G } ]BP/KCjAI< 3oxQ[.o X5qU>'?` public void run() Rh9>iA@fd { 5 &-fX:/ while(nStartPos < nEndPos && !bStop) )(\5Wk9( { \@['V =a?l@dI] ^P:9iu)+]~ try{ `\q4z-<- URL url = new URL(sURL); j"_V+)SD HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); p."pI Bd httpConnection.setRequestProperty("User-Agent","NetFox"); Zj~tUCc String sProperty = "bytes="+nStartPos+"-"; T
{(6*^g<B httpConnection.setRequestProperty("RANGE",sProperty);
?O\n!c Utility.log(sProperty); 11X-X -CT?JB 6O$OM InputStream input = httpConnection.getInputStream(); -YA1Uk //logResponseHead(httpConnection); X LA N~\1yQT _9#4 byte[] b = new byte[1024]; u~1[nH: int nRead; -Qiay/tlu while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) isDBNXV: { )f(#Fn nStartPos += fileAccessI.write(b,0,nRead); Qgo0uuM //if(nThreadID == 1) wR nt$1 // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); /Kwo^Q{ } uzho>p[ae H `),PY2 WSi Utf|g Utility.log("Thread " + nThreadID + " is over!"); q^([ & + bDownOver = true; K}`.?6O //nPos = fileAccessI.write (b,0,nRead); kIrME: } ut& RKr3 catch(Exception e){e.printStackTrace ();} +S^Uw'L$=T } a`q">T%q } cEve70MV h+,zfVJu 2B=yT8 //打印回应的头信息 :~zK0v" public void logResponseHead(HttpURLConnection con) 9i yNR! { d@7
]=P: for(int i=1;;i++) Gow_a' { *vCJTz String header=con.getHeaderFieldKey(i); Xy_+L_h^ if(header!=null) *;Hvx32I //responseHeaders.put(header,httpConnection.getHeaderField(header)); 7$Bq.Lc#z Utility.log(header+" : "+con.getHeaderField(header)); ="d}:Jl else `cy_@Z5A break; +7^%fX;3pW } =MB[v/M59w } mAk)9`f/ >e=tem~/ 6Nj\N oS public void splitterStop() |M)'@s: { ;5PXPpJ bStop = true; xo6-Y=c8 } ,K+K`"Oy .N5}JUj u~bk~3.I } #If}P$! vbmi_[,U <^
@1wg /* la</IpC **FileAccess.java 9,`WQ+OI *//文件访问(定位,写) %%G2w63M package NetFox; A%k@75V@ import java.io.*; l<(MC R* 2%. A{! ht!o_0{~ public class FileAccessI implements Serializable{ }_@*, / /3iai //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 t}c ymX~ RandomAccessFile oSavedFile; VI74{='= long nPos; Al5E :+bQPzL Ra%RcUf~sh public FileAccessI() throws IOException #i%it { ?y>P this("",0); -iR}kP| } ;
"ux{ . 8uP,#D<wZ mHM38T9C% public FileAccessI(String sName,long nPos) throws IOException =$X5O&E3' { Dwj!B;AZ_ oSavedFile = new RandomAccessFile(sName,"rw"); Xjw>Qws this.nPos = nPos; dPc*!xrq oSavedFile.seek(nPos); ]e$mTRi* } )iNMjg yS[:C
2v f7Y0L8D public synchronized int write(byte[] b,int nStart,int nLen) |F=!0Id< { 8`v+yHjG int n = -1; E/v.+m try{ 64%P}On oSavedFile.write(b,nStart,nLen); aHNR0L3$}{ n = nLen; ]>tYU } 0M7Or)qN catch(IOException e) $5yH(Z[[ { )e d5~ok e.printStackTrace (); H!?Av$h` } x4r8^,K3Zn ;PCnEs NoTEbFrV return n; Se.\wkl#Y } #k&"Rv;, VCSHq&p8 i ?&t@"' } twv|,kM 48hu=,)81* =iW!Mq /* 5%BexIk **SiteInfoBean.java [fx1H~T< */ }TY}sr
package NetFox; ,pM~Phmp J -tOO 7I;xRo| public class SiteInfoBean { NRN3*YGo d[E~}Dq3#
o=}}hE\H private String sSiteURL; //Site's URL /j/,@,lw7z private String sFilePath; //Saved File's Path )9I>y2WU~ private String sFileName; //Saved File's Name I@Pp[AyG private int nSplitter; //Count of Splited Downloading File ;\ ^'}S|3Z }(k#,&Fv` 3#N'nhUzA public SiteInfoBean() t5t,(^ ;f {//nSplitter的缺省值为5 RfH.WXi //default value of nSplitter is 5 %:2EoXN" this("","","",5); cq lA"Eof } POvxZU .1n=&d| kt`_n+G public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) <7'`N\a { Tzr_K sSiteURL= sURL; ~tK4C | sFilePath = sPath; rPhx^
QKH2 sFileName = sName; PD #9Z=Hj this.nSplitter = nSpiltter; Dl=9<:6FW W>f q 9 DJ_[{WAV } er@"4R0 ?QA![ < z':_, public String getSSiteURL() ` 9;0Y { N>ncv return sSiteURL; w>#{Nl7gz } ]oT8H?%*Y Dzd[<Qln KLb"_1z public void setSSiteURL(String value) MWdev.m:Z { (LiS9|J! sSiteURL = value; p7{2/mj } I0iTa99K -M]B;[^ hcn$uyP public String getSFilePath() 8;PS>9< { Bd'X~Vj< return sFilePath; Vu`5/QDq } = K)[3mXX Q>q-6/|UX 5hHLC7tT9 public void setSFilePath(String value) 3ey.r%n { cL<,]%SkE sFilePath = value; X
}`o9]y } RWRqu }a sf0\#Q VKtlAfXy~ public String getSFileName() b^STegz { YQ@2p?4m return sFileName; h<Ct[46,S } ? 'qyI^m@ v, CWE xk public void setSFileName(String value) 3RX9LJGX { 0h~{K sFileName = value; (q0vql } M&jlUr&l {!j)j6(NY j/_&]6! public int getNSplitter() Q lA?dXQ { >gs_Bzy] return nSplitter; j74hWz+p4 } BsA'r+ho?H BzzZ.AH~ k$ T public void setNSplitter(int nCount) k0O5c[j { a??8)=0|} nSplitter = nCount; \K~wsu/?` } 1og+(m`BL } G&Dl($ 52 Qr )`(]jx! /* !4cY^4>o **Utility.java ^[r1Dk */ ;gZ/i93:Q package NetFox; GB^ `A W;cYg.W2 Z\U r F0 public class Utility { F81EZ/ A6 .wXv, rX /' public Utility() czU" { :b(W&iBWhI Z)$@1Q4P?1 rm9>gKN;# } uSRhIKy b=xn(HE8| //线程睡眠 9(q(;|;Hp public static void sleep(int nSecond) ZAU#^bEQB { PZJ9f8V try{ K)wWqC. Thread.sleep(nSecond); >;hAw!|# } &mmaoWR catch(Exception e) N)
_24 { OR!W3
@ e.printStackTrace (); e2NK7 } \.O&-oi } w(aHB8T ~=iH*AQR //日志 ;aWk- public static void log(String sMsg) %+Ze$c}X { :o{,F7(P System.err.println(sMsg); Gj-nTN } e%L[bGW' ;*<R~HJt C$PS@4'U public static void log(int sMsg) 'UWkJ2:! { {9}CU~R System.err.println(sMsg); '!`\!=j-` } (^y"'B } eBnx$ &=jPt%7#M ;J TY#)Bh /* bI|G
% **TestMethod.java !pw)sO~ */ &`v?oN9$ package NetFox; UAhWJ$(C kl.; E{PL ;]Q6K9.d8 public class TestMethod { bV&9>fC CAC4A 3MNM<Ih public TestMethod() "W%YsN0 { ///xx/weblogic60b2_win.exe A|
A#|D try{ C&H'?0Y@ SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); J'|=J //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); ,7Hyrx` SiteFileFetch fileFetch = new SiteFileFetch(bean); 4 O8ct,Y fileFetch.start(); zU~ Ff"< } ,GYQ,9: catch(Exception e){e.printStackTrace ();} i83~&Q= Mc asnjC O%\cRn8m } d7vPZ_j^z }-Mg&~e` b~,e(D9DG public static void main(String[] args) Zyz#xMmM { "Esl I new TestMethod(); `/>kN% } M@.S Q@E } jjj<B'zt 点击下载更多相关资料
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