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/* Uligr_c? **SiteFileFetch.java C=Zuy^ */ n%O`K{86 package NetFox; )-sEm`(`I9 import java.io.*; 6jnRC*!? import java.net.*; Pgo5&SQb kBT cND| Sj*H4ZHD<& public class SiteFileFetch extends Thread { ,`wxXU7 Obd! Wqqo8Y~fq SiteInfoBean siteInfoBean = null; //文件信息Bean _%>.t long[] nStartPos; //开始位置 .5T7O_%FP long[] nEndPos; //结束位置 K;Xn!:) V: FileSplitterFetch[] fileSplitterFetch; //子线程对象 BE U[M long nFileLength; //文件长度 Lf,gS*Tg? boolean bFirst = true; //是否第一次取文件 <>R7G)w
F boolean bStop = false; //停止标志
U]P;X~$! File tmpFile; //文件下载的临时信息 *R:nB)(6< DataOutputStream output; //输出到文件的输出流 'R$~U?i8 IEA[]eik> //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) <ImeZ'L7 public SiteFileFetch(SiteInfoBean bean) throws IOException n1LS*-@ {
D?E5p.!A siteInfoBean = bean; Z,2uN!6 //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); ="4jk=on tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); b!N`@m= if(tmpFile.exists ()) C/cyqxVl} { :r6
bw bFirst = false; E6US read_nPos(); Xak~He } '3xSzsDn else ffWvrY;j[ { duM>(y nStartPos = new long[bean.getNSplitter()]; .c',?[S/vH nEndPos = new long[bean.getNSplitter()]; g_q{3PW. } b1^MX).vH &oR&NKk ]l\J"*"aB MdPwuXI } QOO BCNe -V+fQGZe ugL$W@ public void run() [m4<j { d2(n3Xf //获得文件长度 e]5QqM7 //分割文件 n.T
[a //实例FileSplitterFetch }b{N[ //启动FileSplitterFetch线程 1b't"i M //等待子线程返回 p'R}z|d) try{ #A|MNJ%m if(bFirst) y@(U6ZOyx { R` N-^x nFileLength = getFileSize(); N_T;&wibO if(nFileLength == -1) {:"bX~<^ { rj6wKfz System.err.println("File Length is not known!"); :|Z*aI]9 } +Oxl1fDf else if(nFileLength == -2) -PX {W)Aw { FPu,sz8 System.err.println("File is not access!"); {>~|xW } 0>AA-~=- else .qHgQ_% { /2YI!U@A for(int i=0;i<nStartPos.length;i++) i
JQS@2=A { *l5/q\D nStartPos = (long)(i*(nFileLength/nStartPos.length)); sqkPC_;A } ~< k'{ for(int i=0;i<nEndPos.length-1;i++) Z*oGVr
g { (l$bA_F\ nEndPos = nStartPos[i+1]; h-6kf:XP% } Iz ,C!c nEndPos[nEndPos.length-1] = nFileLength; 1c\$ziB } ^c/.D*J[I } O6m}#?Ai/@ WyO10yvR h>fY'r)DAx //启动子线程 -()CgtSR fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; X)'uTf0 for(int i=0;i<nStartPos.length;i++) TT>;!nb { b&0q%tCK fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), >y2gfD siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), 5I@< 6S&X nStartPos,nEndPos,i); -l^ u1z Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); k3u3X~u fileSplitterFetch.start(); lh
.p`^v } /5SBLp}Sy // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), Es)Kw3^a siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); [X;yJ $ // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", l].dOso$` nEndPos = " + nFileLength); }]/"auk // fileSplitterFetch[nPos.length-1].start(); 2x t
8F yv&&x.!.Z CGPPo;RjK //等待子线程结束 t}]=5)9< //int count = 0; =r#of|`Q //是否结束while循环 wOn.m boolean breakWhile = false; LKTIwb> #5=Yg5 QYDSE while(!bStop) >DPC}@Wl { 6"z:s-V write_nPos(); e![n$/E3R Utility.sleep(500); jq%Qc9y breakWhile = true; l7n c8K 7<=xc'*8t >]s|'HTxF for(int i=0;i<nStartPos.length;i++) ;3 O0O { KHI-m9( if(!fileSplitterFetch.bDownOver) }[\l$sS { ;&oS=6$ breakWhile = false; !T!U@e=u break; 2ntL7F<ow } b:SjJA,HM } r".*l?= if(breakWhile) **N{XxdN break; M2l0x @| ]MKW5Kq Uf4A9$R.G //count++; (p>?0h9[ //if(count>4) hxZ5EKBy // siteStop(); !:]CKbG } Nawph 5_ !s\ 5 =^\yE"a System.err.println("文件下载结束!"); zmB6Y
t } H|JPqBNRh catch(Exception e){e.printStackTrace ();} r~nD%H:}P }
\,&,Q {<+B>6^ (E[c-1s //获得文件长度 ~.7/o0'+ public long getFileSize() Ve)P/Zz}^ { \MI2^JN int nFileLength = -1; lY
-2e> try{ uGt}H n URL url = new URL(siteInfoBean.getSSiteURL()); =p{55dR HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); 3b{ 7Z 2 httpConnection.setRequestProperty("User-Agent","NetFox"); =S+*=j A B8.a#@R =>3wI'I int responseCode=httpConnection.getResponseCode(); 1*U)\vK~ if(responseCode>=400) 8z1#Q#5 { BA(erf> processErrorCode(responseCode); &tVIl$e
return -2; //-2 represent access is error 3EkCM_] } h@AKfE!\~ ;YN`E Aqy y\G; String sHeader; 2i0 .x LuW>8K\ yM}~]aQ y for(int i=1;;i++) u1 Z;n { |#(KP //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); (;!92ct[? //Utility.log(in.readLine()); )_C+\K* sHeader=httpConnection.getHeaderFieldKey(i); d?ru8 if(sHeader!=null) cV$an { S@Iza9\|@ if(sHeader.equals("Content-Length")) |qs8(
5z0 { U1ZKJ<pv nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); YuXCRw9p; break; `uP:UQ9S } C]EkVcKFA } yE&WGpT else ThvgYv--B break; Zh } +$}3=n34) } LUs)"ZAi| catch(IOException e){e.printStackTrace ();} *O|_)G catch(Exception e){e.printStackTrace ();} ObPXVqG"? 'kOkwGf! !n7'TM' Utility.log(nFileLength); hv0bs8h 8TBv~Qu S;0z%$y return nFileLength; @
D,]v: } O=[Q>\p ;~-ZN?8
q4#$ca[_ak //保存下载信息(文件指针位置) DFkDlx private void write_nPos() S,Z~-j { Wsb>3J try{ q4ttmL8 output = new DataOutputStream(new FileOutputStream(tmpFile)); 3+l8VX&u! output.writeInt(nStartPos.length); 2YDD`:R
for(int i=0;i<nStartPos.length;i++) "XQ3mi`y { }_Ci3|G>%D // output.writeLong(nPos); ds9U9t output.writeLong(fileSplitterFetch.nStartPos); })+iAxR output.writeLong(fileSplitterFetch.nEndPos); {'Y()p3kl } /a*8z,x output.close(); ?y-@c] } F
EUfskv catch(IOException e){e.printStackTrace ();}
Y\Z6u) catch(Exception e){e.printStackTrace ();} )&DsRA7v } 8J#x B j0=F__H#@ 2"T
b><^" //读取保存的下载信息(文件指针位置) u6 QW*8b4 private void read_nPos() /lC,5y { ^F'~|zc"C try{ <&^[?FdAa DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); mGDy3R90 int nCount = input.readInt(); XuWX@cK nStartPos = new long[nCount]; \QQWh wE nEndPos = new long[nCount]; h3bQ<?m for(int i=0;i<nStartPos.length;i++) deQ { { \2!. nStartPos = input.readLong(); >k
==7#P nEndPos = input.readLong(); ce;$)Ff\ } Oq$-*N input.close(); YZ]}l%e } x+DETRLP catch(IOException e){e.printStackTrace ();} NT2XG&$W> catch(Exception e){e.printStackTrace ();} k.7!)jL7 } qzNXz_#+u n=)LB&
m p TaC$Ne private void processErrorCode(int nErrorCode)
lI%RdA[ { dWi<U4 System.err.println("Error Code : " + nErrorCode); 2}7 _Y6RS* } aS[y\9(** 7IFZK\V >0[:uu,'> //停止文件下载 pHx$ public void siteStop() MLlvsa0 { A9g/At_ bStop = true; "N">RjJ" for(int i=0;i<nStartPos.length;i++) j D*<M/4 fileSplitterFetch.splitterStop(); b)x0;8< ur E7ZKdI m]*a;a'}# } RT3(utwO } =>lX brJ //负责部分文件的抓取 FaWDAL=Vhk **FileSplitterFetch.java o=#ym4hJ% */ ]%I\FefT package NetFox; j'Jb+@W? j/Y]3RSMp u Fw1% import java.io.*; kN3 <l7 import java.net.*; IA&V?{OE@I
0Gc:+c7{ #_x5-?3 public class FileSplitterFetch extends Thread { r73W.& ',!jYh}Uxk {chZ&8)f String sURL; //File URL PH&Qw2(Sx long nStartPos; //File Snippet Start Position j!NXNuy: long nEndPos; //File Snippet End Position
Qe7=6< int nThreadID; //Thread's ID 7.Z- boolean bDownOver = false; //Downing is over b{,v?7^4 boolean bStop = false; //Stop identical (J.Z+s$:2 FileAccessI fileAccessI = null; //File Access interface *U6+b oK-d58 sM ?<BI)[B public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException wkPjMmW+! { 9_d#F'#F this.sURL = sURL; _68vSYr this.nStartPos = nStart; +c!HXX this.nEndPos = nEnd; Y3~z#< nThreadID = id; F!g1.49"" fileAccessI = new FileAccessI(sName,nStartPos);//定位 i$p2am8f } [ `1`E1X h~]e~u V R) :Xs . public void run() ;]0d{ { P_0[spmFU while(nStartPos < nEndPos && !bStop) JFO,Q
-y\ { iZiT/#, H2 jIr\.i /n(0w` try{ 2A@oa9 URL url = new URL(sURL); l'_]0%o] HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); ~E((n httpConnection.setRequestProperty("User-Agent","NetFox"); &L5
)v\z String sProperty = "bytes="+nStartPos+"-"; QW,:'\G httpConnection.setRequestProperty("RANGE",sProperty); _b/zBFa% Utility.log(sProperty); {]8|\CcY? OI6Mx$ eR>8V8@ InputStream input = httpConnection.getInputStream(); MZX)znO //logResponseHead(httpConnection); ZiQ<SSo: oy#(]K3`O +>1?ck byte[] b = new byte[1024]; h%$^s0w int nRead; QwpX3
k6 while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) 1eV&oN# { U^GVz%\ nStartPos += fileAccessI.write(b,0,nRead); I<sUB4T>#W //if(nThreadID == 1) jUNt4 // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); mF~]P8 } ~+0IFJ `} =y@0il+V &v*4AZ[' Utility.log("Thread " + nThreadID + " is over!"); `?R{sNr. bDownOver = true; =^rp=
Az //nPos = fileAccessI.write (b,0,nRead); onRTX|# } hp/pm6 catch(Exception e){e.printStackTrace ();} >KP,67 } Ri`6X_xU } \ +sa[jK elhP!"G 1aIGC9xQ` //打印回应的头信息 +aEm]=3 public void logResponseHead(HttpURLConnection con) ,D }Ka? { PDw+Q for(int i=1;;i++) "|dhmV[; { fPKpV`Hr3 String header=con.getHeaderFieldKey(i); W ).Kq- if(header!=null) Kf[.@_TD<1 //responseHeaders.put(header,httpConnection.getHeaderField(header)); %5zIh[!1$ Utility.log(header+" : "+con.getHeaderField(header)); !e<2o2~. else gt.F[q3
break; 'v0rnIsI? } tF-l=ph}` } Zqe$S
+u !lFNG:&` fgj$
u public void splitterStop() # }}6JM { 1Dhe!
n# bStop = true; @|t]9 } ^swj!da =8tK]lb "\}h } Qb)c>r . 70=xH GT]> /* TW(X#T@Z6I **FileAccess.java +HUy,@^Pa *//文件访问(定位,写) r_Ou\|jU package NetFox; MbInXv$q2/ import java.io.*; n CX{tqy =X5w=(& mejNa(D ^ public class FileAccessI implements Serializable{ #T>?g5I O>nMeU //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 dr&G> RandomAccessFile oSavedFile; s1::\&`za long nPos; cU ?F D rA?<\* y5aPs z public FileAccessI() throws IOException _U4@W+lhX_ { d6[' [dG this("",0); e&T-GL } rf@47H |1A0YjOD 2NjgLXP public FileAccessI(String sName,long nPos) throws IOException R(&3})VOa { GLZ*5kw oSavedFile = new RandomAccessFile(sName,"rw"); i
g7|kl this.nPos = nPos; b|Ge#o oSavedFile.seek(nPos); (91ts$jH } FMF mn| SKNHLE} d&|5Rk
~ public synchronized int write(byte[] b,int nStart,int nLen) owA8hGF { pYAKA1F int n = -1; [!3cWJCt try{ 3$P oSavedFile.write(b,nStart,nLen); I Ij:3HP
n = nLen; wVI_SQ<8V } L.. catch(IOException e) L.-qTh^P { Ho*B<#&(A| e.printStackTrace (); <zTz/Hk` } )[UYCx' XHKLl?- 7CF>cpw return n; 3w p@OF_ } ~rjK*_3/ 8;<aco/62 lg
)xQV } SQU@JKi;g '?.']U,: $ >jTiYJI_M /* Lh-Y5(c
o **SiteInfoBean.java bYem0hzOe */ ZR|s]' package NetFox; e&ZH 1^O 7 u Q +]d l'2vo=IQ public class SiteInfoBean { VE/m|3%t L">jSZW[[ kt_O= private String sSiteURL; //Site's URL ]xb2W~ private String sFilePath; //Saved File's Path Si23w'T private String sFileName; //Saved File's Name wfu`(4 private int nSplitter; //Count of Splited Downloading File GeB-4img XJl
3\* *'M+oi public SiteInfoBean() w&es N$2 {//nSplitter的缺省值为5 E;4d lL`* //default value of nSplitter is 5 OaoHN& " this("","","",5); V^n=@CZT9C } 4~oRcO8!Y 4XiQ8"C MZX@Gi<S[ public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) y9@j-m& { ~K|ha26W sSiteURL= sURL; gth_Sz5!# sFilePath = sPath; t(.vX sFileName = sName; Abmi=]\bx this.nSplitter = nSpiltter; g.8^ )u \7$"i5 ;8e}X6YU } c;yp}k]\ 4 s9^%K\8{ &h6 `hP_ public String getSSiteURL() {m,LpI0wG { ?wIEXKI return sSiteURL; ZN'B@E=p } D^];6\=.i q/@r# { VM^K1 public void setSSiteURL(String value) .]<iRf[\[ { J=O_nup6C sSiteURL = value; nS.qK/.s } A~0yMww:$ 6Rg>h Y~#.otBL& public String getSFilePath() fp 3`O9+em { 4Uwcc):f return sFilePath; G-vkkNj%e } 7}&vEc@w& "1DlusmCCB {[{jlG4H public void setSFilePath(String value) )7E7K%:b, { ,K&L/* sFilePath = value; v806f8 } t|UM2h Kj4L PG 2j{T8F\] public String getSFileName() RO'b)J:j9 { $c+:dO|Fb return sFileName; +J42pSxzoo } ojIGfQV J/Ch
/Sa 69odE+-X. public void setSFileName(String value) HMKogGTTo { IFF1wfC
sFileName = value; 9!Fg1h= } H$zD k !(j<Y0xo: %~lTQCPE public int getNSplitter() /(}YjeS { G{a_\'7 return nSplitter; ~Hb0)M@y7 } Q$yQ^ mG bWZzb& _znn `_N:v public void setNSplitter(int nCount) QT(]S>--n { Jb7^'P nSplitter = nCount; h{ EnS5~ } (S&D } NV2$ >D j4(f1 {^R"V ,) /* ;T>. **Utility.java ?y~"\iP */ T&E'MB package NetFox; LdX'V]ITh U)('}u=b z&.F YGq} public class Utility { srS5-fs (Ii+}Mfp gI+dyoh public Utility() S$GWY^5}{ { )u=a+T <;!#+|L/ 19\
V@d^ } 8;(3fSNC qI2&a$Zb$ //线程睡眠 R w!_j! public static void sleep(int nSecond) -JdNA2P
{ e1R<+`] try{ U/{#~P5s Thread.sleep(nSecond); gt(!I^LHYc } mqQC`Aqx: catch(Exception e) .JWN\\ { {jEEAH) e.printStackTrace (); FBA th
!E } rJCu6 } lnrs4s Km Rw`64 L_ //日志 *7yrm&@nG public static void log(String sMsg) Ce@"+k+w { %Lfy!]Ru System.err.println(sMsg); Q\*zF,ek } mFuHZ)iQG W!b'nRkq |I=GI]I public static void log(int sMsg) <
_<?p& { v}uzUY System.err.println(sMsg); cg}lF9;d } n,b6|Y0 } S 0mt8/ M j
k/-7/r ?s9f}> /* eY'RDQa **TestMethod.java F Xp_`9.zH */ ^J&}C package NetFox; rTA#4.*& q.d
qr< ?l](RI
public class TestMethod { Lz`_&&6 3q0S}<h al
y7.oy" public TestMethod() SM[VHNr,- { ///xx/weblogic60b2_win.exe [LKzH!
try{ O|0,=
5 SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); Z"
dU$,n //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); wI#R\v8(`n SiteFileFetch fileFetch = new SiteFileFetch(bean); x8RiYi+ fileFetch.start(); W-4R;!42 } Eyg F,>.4 catch(Exception e){e.printStackTrace ();} sO8F0@%aH( 23P7%\ aoU5pftC } Ew&|!d |
=tGrHL eZmwF@ public static void main(String[] args) fWl #CI\] { >ToI$~84 new TestMethod(); opon"{ } a- 7RJ. } 2 :&QBwr+; 点击下载更多相关资料
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