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/* "(Mvl1^BT **SiteFileFetch.java ]^Sd9ba */ 0Ulxp package NetFox; 5P-K *C& import java.io.*; $Vo/CZW7 import java.net.*; 8FAT(f//. ^!q 08`0 r5D jCV" public class SiteFileFetch extends Thread { <9=zP/Q X'YfjbGo qsD?dHi7 SiteInfoBean siteInfoBean = null; //文件信息Bean wYZy e^7 long[] nStartPos; //开始位置 W/b"a? wE{ long[] nEndPos; //结束位置 s.f`.o FileSplitterFetch[] fileSplitterFetch; //子线程对象 d&/^34gn long nFileLength; //文件长度 )C'G2RV boolean bFirst = true; //是否第一次取文件 ` 52%XI boolean bStop = false; //停止标志 =9kj?
u~
File tmpFile; //文件下载的临时信息 ]\[m=0K DataOutputStream output; //输出到文件的输出流 -0{T d1UVvyH //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) P
h9Hg' public SiteFileFetch(SiteInfoBean bean) throws IOException oxUE79 { t8L<x siteInfoBean = bean; KDux$V4 //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); += X).X0K tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); v]B0!k&4. if(tmpFile.exists ()) ~sZqa+jB0 { `6|i&w:b bFirst = false; |E46vup read_nPos(); t.3Ct@wK } s]$HkSH else lo\: ]/&6 { JQ~y- lt nStartPos = new long[bean.getNSplitter()]; D=jSh nEndPos = new long[bean.getNSplitter()]; *rS9eej } qFV;n6&V lc\>DH\n6 ;n%]*v TX<e_[$\ } t#fs:A7P?} Xg|8".B)A 17J} uXA public void run() 2z'+1+B' { m-:8jA? //获得文件长度 5}vRo;- //分割文件 vF5wA-3&t //实例FileSplitterFetch 8
m%>:}o //启动FileSplitterFetch线程 \hjk$Gq //等待子线程返回 s-QM6* try{ nAQyxP% if(bFirst) QH@Q\
@, { fG:PdIJ7_ nFileLength = getFileSize(); Xz;et>UD*B if(nFileLength == -1) ;X?Ah { TYs+XJ'Xj System.err.println("File Length is not known!"); ]jHh7> D } >wz;}9v else if(nFileLength == -2) y#hga5 { <;2P._oZ System.err.println("File is not access!"); }"F
?H:\ } 4yA9Ni else ?b!CV
{ ti$oZ4PpF for(int i=0;i<nStartPos.length;i++) N&6_8=3z { b@nri5noBm nStartPos = (long)(i*(nFileLength/nStartPos.length)); .`oJcJ } b&\3ps for(int i=0;i<nEndPos.length-1;i++) jF%)Bhn( { W&fW5af9 nEndPos = nStartPos[i+1]; @4 zi]v } ek<PISlci nEndPos[nEndPos.length-1] = nFileLength; hQgk.$g } ib5;f0Qa } oV0LJ% ga4/, OaD
Alrm //启动子线程 #6Efev fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; _n-VgPRn for(int i=0;i<nStartPos.length;i++) v#Cz&j { W0+gfg fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), 37j\D1Y siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), mQwk!* U nStartPos,nEndPos,i); t9Enk!@ Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); *r)zBr fileSplitterFetch.start(); 21[K[ % } _&k'j)rg // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), 7Y-FUZ.`> siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); &+)+5z_d // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", p9FA_(`^ nEndPos = " + nFileLength); WUE)SVf // fileSplitterFetch[nPos.length-1].start(); N<#S3B?. &&(4n?
KuIt[oM //等待子线程结束 e.)yV'%L //int count = 0; }};j2 //是否结束while循环 1kB'sc3N! boolean breakWhile = false; SQO>}#qm Bi9
N {
4_I7r while(!bStop) d-6sC@PB { ,wwU`
U write_nPos(); f7EIDFX>pt Utility.sleep(500); &^CL]&/ breakWhile = true; 2.fyP"P
L tJ?qcT? `l[6rf_. for(int i=0;i<nStartPos.length;i++) ImUQ*0 { bqw/O`*wfN if(!fileSplitterFetch.bDownOver) /t$+Af,} {
D\45l breakWhile = false; ifJv~asp break; J[j/aDdP } ue6/EN;} } ,$MWk(S if(breakWhile) bm|Jb"T0b break; )1ZJ B|]t\(~$[ ,(@Y%UW: //count++; %fn'iKCB //if(count>4) "k\Ff50 // siteStop(); JEK%yMj } >\6jb&,%O I,],?DQX2) 2- Npw%; System.err.println("文件下载结束!"); x*loACee. } GsP@ B' catch(Exception e){e.printStackTrace ();} `@fhge } XhlI|h-j ()JYN5 !^Z[z[ //获得文件长度 -)y> c public long getFileSize() U(S@1i( { EO o'a int nFileLength = -1; N27K try{ WryW3];0OR URL url = new URL(siteInfoBean.getSSiteURL()); )*^OPVt HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); K]H"qG.K httpConnection.setRequestProperty("User-Agent","NetFox"); z. _C*c ?{@!!te@3v Q8}TNJsU int responseCode=httpConnection.getResponseCode(); \jF" nl if(responseCode>=400) vc>^.#7
{ *7xQp!w^ processErrorCode(responseCode); +YQ)}v return -2; //-2 represent access is error fw(j6:p } MYDf`0{$_a jt'Y(u]2 /H\^l.|vk String sHeader; 4t+/ 323yAF d!}jdt5% for(int i=1;;i++) xVHQ[I% { eu}:Wg2 //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); i
h`y0(< //Utility.log(in.readLine()); Pjj;.c 7_j sHeader=httpConnection.getHeaderFieldKey(i); Pq{YZMr if(sHeader!=null) 26('V `N { ,{`o/F/ if(sHeader.equals("Content-Length")) t(z(-G|& { cjy0s+>> nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); n7`.<*:
break; Sq?6R}q% } >n$EeJ } ;4S
[ba1/ else ?v )"%. break; $X.'W\o| } hIzPy3 } %~B)~|h catch(IOException e){e.printStackTrace ();} \0*yxSg,^ catch(Exception e){e.printStackTrace ();} >PTu*6Z /\3XARt `F-Dd4B Utility.log(nFileLength); \K_!d]I { T,xVQ4J? fr,CH{Uq return nFileLength; VxPTh\O*[ } |j5AU ^)C$8:@ ;K)?: //保存下载信息(文件指针位置) `3>)BV<P private void write_nPos() L!+[]tB { )K\k6HC. try{ P60]ps!M output = new DataOutputStream(new FileOutputStream(tmpFile)); +NzD/.gq output.writeInt(nStartPos.length); My6]k?;}( for(int i=0;i<nStartPos.length;i++) x%:>Ol { !cFE^VM_; // output.writeLong(nPos); ,h^;~|GT output.writeLong(fileSplitterFetch.nStartPos); <2TB9]2. g output.writeLong(fileSplitterFetch.nEndPos); X/;"CM } R<0!?`b output.close(); ,39$iHk } 3$kv%uf{ catch(IOException e){e.printStackTrace ();} x9&tlKKxf catch(Exception e){e.printStackTrace ();} JI[rIL\Ey } *\~kjZ 3 66"ZH,335 9%)& }KK| //读取保存的下载信息(文件指针位置) j_ywG{Jk private void read_nPos() G"UH4n[1ur { I8-&.RE try{ QLpTz"H DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); *> &N
t int nCount = input.readInt(); K_lCDiqG nStartPos = new long[nCount]; 0R%uVJG nEndPos = new long[nCount]; On96N| for(int i=0;i<nStartPos.length;i++) S}xDB { (?&_6B.* nStartPos = input.readLong(); ["#A -S nEndPos = input.readLong(); +DV6oh } o7 -h'b- input.close(); C"m0"O> } tpx3:| catch(IOException e){e.printStackTrace ();} -)vp&- catch(Exception e){e.printStackTrace ();} n]ppO
U|[ } {;z
L[AgCg h> 5~
(n8 kmwrv -W private void processErrorCode(int nErrorCode) K7&8;So
{ GE3U0w6WbK System.err.println("Error Code : " + nErrorCode); $qyM
X[ } >G3J3P( OTFu4"]M o}^vREO //停止文件下载 I3E8vi%B. public void siteStop() iDkWW { `bi_)i6Low bStop = true; ~3-YxCn% for(int i=0;i<nStartPos.length;i++) o j4)7{ fileSplitterFetch.splitterStop(); }HQT@&= ,IVr4#w0= +KwF
U } e[k;SSs } oWaIjU0 //负责部分文件的抓取 HS&uQc a **FileSplitterFetch.java uF.\dY\xv */ r0$9c package NetFox; T I7Ty+s /qQ2@k 1.d9{LO [- import java.io.*; MPEBinE? import java.net.*; 7Hkf7\JY Xi`U`7?D(= [@FeRIu8 public class FileSplitterFetch extends Thread { 1oW]O@R uA}FuOE6 d<cbp[3F String sURL; //File URL Ex s _LN long nStartPos; //File Snippet Start Position +MoxvW6 long nEndPos; //File Snippet End Position !
{o+B^^ int nThreadID; //Thread's ID PM?Ri^55<L boolean bDownOver = false; //Downing is over `
Ehgn?6' boolean bStop = false; //Stop identical }Yl8Q>t FileAccessI fileAccessI = null; //File Access interface "s6_lhu=E7 BRok 89 H><mcah public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException Ky~~Cd$ { eEZlVHM;O this.sURL = sURL; ]A<u eM this.nStartPos = nStart; 8Carg~T@ this.nEndPos = nEnd; @U.}Ei nThreadID = id; F-\8f(\ fileAccessI = new FileAccessI(sName,nStartPos);//定位 tlxjs]{0E } IEsD= e=Tc(Mwn Qc<O; # public void run() Pg8= { iU+,Jeu while(nStartPos < nEndPos && !bStop) -Aym+N9 { ^EBM;&;7 3UtXxL&L` Q+js2?7^ try{ cZ2,
u,4 URL url = new URL(sURL); }~,cCtg:o HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); J3S byI!T httpConnection.setRequestProperty("User-Agent","NetFox"); ;A'17B8 String sProperty = "bytes="+nStartPos+"-"; l#f]KLv4N_ httpConnection.setRequestProperty("RANGE",sProperty); \hD
bv5 Utility.log(sProperty); <EN[s (2(;u1 &$Ip$"H InputStream input = httpConnection.getInputStream(); 2<. /HH*f //logResponseHead(httpConnection); ;}9Ws6#XQs ^p%+r B.j[ q9z!g/,d/ byte[] b = new byte[1024]; zyn =Xv@p int nRead; B-p5;h> while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) w3|.4hS { hfa_M[#Q- nStartPos += fileAccessI.write(b,0,nRead); ' g!_Flk //if(nThreadID == 1) NP`ll0s // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); en6AAr:U} } {ZI6!zh' NbMH@6%E tJfN6 Utility.log("Thread " + nThreadID + " is over!"); bD[W~ku bDownOver = true; \bmboNe //nPos = fileAccessI.write (b,0,nRead); t4W0~7 } 2Sd6b 2- catch(Exception e){e.printStackTrace ();} &`y_R' } {YLJKu!M } p.Yg-CA U1tPw`0h f5XcBW9E //打印回应的头信息 WSccR public void logResponseHead(HttpURLConnection con) 1,D
^, { aL6 5t\2 for(int i=1;;i++) %31K*i/] { ?O^:j!C6 String header=con.getHeaderFieldKey(i); qGUe0( if(header!=null) <.XoC?j //responseHeaders.put(header,httpConnection.getHeaderField(header)); ,(?4T~ Utility.log(header+" : "+con.getHeaderField(header)); RwHXn]1 else Os]M$c_88 break; j~>
#{"C } %Ne>'252y } XE%6c3s I}3K,w/7mi *Z(C')7r public void splitterStop() 9
f/tNQ7W { e';c8WF3E bStop = true; EB<tX`Wp } f3|=T8"t Q#bo!]H{t *3oQS"8 } oQB1fs 'B:De"_(N Q%d[U4@ /* *#9kFz- **FileAccess.java Ykq }9 *//文件访问(定位,写) +a@SdWf package NetFox; X2 kLbe import java.io.*; bTKxv< g{{SY5qDj m5g: Q public class FileAccessI implements Serializable{ oK[,xqyA e+aQ$1^t //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 FJ.
:*K[ RandomAccessFile oSavedFile; jH/%Z5iu long nPos; LM`#S/h
0$uS)J\;K ur5n{0# public FileAccessI() throws IOException WL]'lSHa { o?8j*] this("",0); .v8=zi:7Y } N=x,96CF N/.9Aj/h~& GY :IORuA4 public FileAccessI(String sName,long nPos) throws IOException Ghe=hhZ { JYUKs~Qt oSavedFile = new RandomAccessFile(sName,"rw"); *xKR;?. this.nPos = nPos; 6-}9m7# Y oSavedFile.seek(nPos); -^N '18: } %"B$I>h ^el:)$ Pk2"\y@q/ public synchronized int write(byte[] b,int nStart,int nLen) Z)4P>{ { YZD]<ptR int n = -1; 9LRY try{ aa!c>"g6 oSavedFile.write(b,nStart,nLen); pp _ddk n = nLen; Etk<`GRfA } bsVOO9.4- catch(IOException e) L2tmo-]nw { % QkvBg* e.printStackTrace (); ?os0JQVB } EaL+}/q& P0<uF`87 \hX^Cn=6 return n; evP`&23tP } Ric$Xmu #SOe&W5 4QDzG~N4)| } 9`b3=&i\ .!! yj,bQz sk/Mh8z /* bZJiubBRI **SiteInfoBean.java dD!SgK [Jv */ N9Vcp~; package NetFox; **[p{R]8o b*7i&q'H z""(M4 public class SiteInfoBean { !b_IH0]U _l<"Qqt "b;?2_w:E private String sSiteURL; //Site's URL bSzb! hT` private String sFilePath; //Saved File's Path `WL*Jb private String sFileName; //Saved File's Name a WC
sLH private int nSplitter; //Count of Splited Downloading File ujBADDwOg) lnUy?0( =n&83MYX
public SiteInfoBean() P'';F}NwfX {//nSplitter的缺省值为5 V00zk`PH //default value of nSplitter is 5 4|UIyDt8 this("","","",5); #{a <{HX } (C|%@6 1S zyE yZc? v%w]Q B public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) fk_i~K { _9dV
3I sSiteURL= sURL; Adm`s . sFilePath = sPath; 9`{cX sFileName = sName; hCrgN?Mz this.nSplitter = nSpiltter; *G38N]|u6 JJr<cZ4] O5w\oDhMb } *{bqHMd4L [; bLlS, 12E"6E) public String getSSiteURL() }K\_N]#6n { u-$AFSt return sSiteURL; +iR;D$w } aJts >#Yq&@G )sr]}S0 public void setSSiteURL(String value) Qy%/+9L { :A[/;|& sSiteURL = value; H#:Yw|t } 70Am]L&M 9v A`\\9 4+0Zj+
q"; public String getSFilePath() 62q-7nV { Y;WrfO$J return sFilePath; - K{ID$!p } 0ni5 :tYy R_&>iu'[ 1vr/|RWW public void setSFilePath(String value) gkjZX
wp { n >^?BU sFilePath = value; S_atEmQ } ZL
Aq8X uo^>95lkv )_ y{^kn3^ public String getSFileName() V l%k: { aap:~F{]X return sFileName; i8]r}a } !WmpnPr1 w@4+&v>O @9L9c public void setSFileName(String value) k dqH36&< { @NF8?>! sFileName = value; f{J7a1 `_ } "(5}=T@, >;Bhl|r~z d$ /o\G public int getNSplitter() 0WFZx
Ad" { U8dwb return nSplitter; )]}*oO } 2;3q](d =[$*PTe kF5}S8B public void setNSplitter(int nCount) xiiZ'U { p ,!`8c6 nSplitter = nCount; ;Mc}If* } 9f
"*Oj } CfAqMH*ip 0t~--/lA x8H)m+AW /* qy!G& **Utility.java l/]P6 @N */ Kfi A 7W package NetFox; cb+!H>+ R#t~i&v/ psMagzr&)e public class Utility { 4xlsdq8`t P_;oSN|> LZeR.8XM> public Utility() ;rFa I^ { srCjq 1yo@CaW[\ ;RrfE8mGj } # a3Q<%V H/b(dbs //线程睡眠 yP@=x!$ public static void sleep(int nSecond) }E=mZZ) { m=R4A4Y7 try{ U>>J_2 Thread.sleep(nSecond); o)$sZ{` =" } 67e1Y@Xu catch(Exception e) 3|A"CU/z@ { 6 3HxQH e.printStackTrace (); 0YS*=J"7z } q*T+8O } cc>h=%s` -{O2Nv- ]] //日志 qAU]}Et/ public static void log(String sMsg) f7`y*9^ { sU8D;ML7 System.err.println(sMsg); \nLO., } \3KCZ `@ObM[0p( {>i'Pb0mG| public static void log(int sMsg) l6O2B/2j { 71~V* System.err.println(sMsg); wxoBq{r; } L3/ua
} U{ Y)\hR- A_2ppEG i,~{{XS< /* (<f[$ |% **TestMethod.java N>/U%01a */ wC[J=:]tA5 package NetFox; -0W;b"]+A 6 2LZ}yn_" 0]Li"Wb public class TestMethod { ]t,ppFC# qn<~
LxQ ^Ab|\5^3 public TestMethod() Oz+>I^Q { ///xx/weblogic60b2_win.exe ]!f=b\-Av try{ _ K9jj SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); A_[65'*b //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); =.uE(L`]NA SiteFileFetch fileFetch = new SiteFileFetch(bean); }NUP[% fileFetch.start(); 8T%z{ A1T } old}}>_ catch(Exception e){e.printStackTrace ();} +pE-Yn`YS O9qEKW)a vX{]_ } $GcVC (] lAoH@+dyA+ DukCXyB*l public static void main(String[] args) 5r.{vQ { K(_nfE{ new TestMethod(); -JcfP+{wS } ;}r#08I } )37|rB E 点击下载更多相关资料
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