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/* Z0 IxYEp **SiteFileFetch.java +s(IQt */ } .H Fm'p package NetFox; &J/4J import java.io.*; 3auJ^B} import java.net.*; 9H, &nET &G@-yQ Kg TGxCH public class SiteFileFetch extends Thread { kl3S~gE4@ xAd>",=~ OQL09u SiteInfoBean siteInfoBean = null; //文件信息Bean Vkvb= long[] nStartPos; //开始位置 :Nj`_2 long[] nEndPos; //结束位置 h;ol" FileSplitterFetch[] fileSplitterFetch; //子线程对象 *v
nxP9< long nFileLength; //文件长度 ogc('HqF^' boolean bFirst = true; //是否第一次取文件 ks%7W
- boolean bStop = false; //停止标志 a[74%L? File tmpFile; //文件下载的临时信息 ['OCw {< DataOutputStream output; //输出到文件的输出流 q'Pz3/mk Ux)p%- //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) t3#H@0< public SiteFileFetch(SiteInfoBean bean) throws IOException 'f?&EsIV? { tC@zM.v% siteInfoBean = bean; mQ^@ \s //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); o&XMgY~ tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); w^'?4M! if(tmpFile.exists ()) .xLF}{u { C=dx4U~
bFirst = false; *n*N|6+ read_nPos(); PZ!dn%4jy } yhtvr5z1 else bhqq { I~]Q55 nStartPos = new long[bean.getNSplitter()]; (XG[_ nEndPos = new long[bean.getNSplitter()]; Q+!0)pG5# } Oa\ `; rTsbP40 Zu0;/_rN 5e/qgI)M5 } l@tyg7CwY MCi` TXr ZH;y>Z public void run() kToVBU$ { @`kiEg'Q //获得文件长度 +i`Q 7+d //分割文件 -#S)}NEn //实例FileSplitterFetch 8G5)o` //启动FileSplitterFetch线程 Nr]8P/[~ //等待子线程返回 )pZekh]v try{ te\h?H if(bFirst) 7dlKdKH { N7~)qqb nFileLength = getFileSize(); EOBs}M; if(nFileLength == -1) jI{~s]Q { /[20e1 w! System.err.println("File Length is not known!"); &weY8\HD } d@D;'2}Yc else if(nFileLength == -2) X@yr$3vC { e:$7^Y,U/ System.err.println("File is not access!"); /Oggt^S } %7NsBR!y else K{zCp6 { 2GiUPtO&Gj for(int i=0;i<nStartPos.length;i++) FM9X}%5nu9 { :PFx& nStartPos = (long)(i*(nFileLength/nStartPos.length)); %l8*t$8 } 4#@W;' for(int i=0;i<nEndPos.length-1;i++) UKKSc>D1 { sw41wj nEndPos = nStartPos[i+1]; UBhciZ } Y3P.| nEndPos[nEndPos.length-1] = nFileLength; ];pf } p- "Z'$A` } Vedyy\TU $*AC>i\ FI1THzW4J //启动子线程 GJIWG&C03 fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; %_b^!FR for(int i=0;i<nStartPos.length;i++) {*?sVAvj { @q> ktE_ fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), V\@jC\-5Vt siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), N;Z`%& nStartPos,nEndPos,i); *?^Z)C> Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); Sg. +`xww3 fileSplitterFetch.start(); }xkLD! } ?~aZ#%*i8 // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), $Wr\[P: siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); tLD~ // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", *t#s$Ga nEndPos = " + nFileLength); poXLy/K // fileSplitterFetch[nPos.length-1].start(); @%EE0)IA XOysgX0g 5!'R'x5e //等待子线程结束 HDF!` //int count = 0; o%Be0~n' //是否结束while循环 AezvBY0'`z boolean breakWhile = false; ~|CJsD/ F-BJe] N+CXOI=6x while(!bStop) HY jMNj0 { b&lN%+%} write_nPos(); f{y] Utility.sleep(500); /OQK/
t63 breakWhile = true; :vc[/< <i_>
y~v` x],8yR)R for(int i=0;i<nStartPos.length;i++) [!1)mR { Fw_
(q! if(!fileSplitterFetch.bDownOver) KqM! ! { -A/ds1=; breakWhile = false; K<@[_W+ break; zVM4BT( } le7
`uz!% } ?xtt7*'D if(breakWhile) kAZC"qM%i break; R*s* +I V#ndyUM; kCima/+_ //count++; 8G 0 //if(count>4) .MDYGWKt // siteStop(); nE/=:{~Ws } uy/y wm/?= .A3DFm3 t gw_|C|!P System.err.println("文件下载结束!"); p=!#],[ } BRQ"A, catch(Exception e){e.printStackTrace ();} aB6Ye/Io } 1<xcMn0et KxO/] )46
0Ed //获得文件长度 rkxW UDl public long getFileSize() :{[<g]( { u5Qp/ag?N int nFileLength = -1; `S"W8_m try{ # v.L$7O URL url = new URL(siteInfoBean.getSSiteURL()); \'n$&PFe HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); X'cf&>h httpConnection.setRequestProperty("User-Agent","NetFox"); r%0pQEl [NYj.#,oR IE&_!ce int responseCode=httpConnection.getResponseCode(); JXpoCCe if(responseCode>=400) 3c c1EQ9 { f?,-j>[.=f processErrorCode(responseCode); ~O \}/I28 return -2; //-2 represent access is error ?n!lUr$:y } f#@S*^%V$ ;aq `N}d vG Y!4@[ String sHeader; Y4QLs^IdB p3g4p Xo2^N2I for(int i=1;;i++) hlX>K { ($c`s8mp //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); 9160L qY //Utility.log(in.readLine()); r=h8oUNEJ* sHeader=httpConnection.getHeaderFieldKey(i); cp$.,V if(sHeader!=null) :@.C4oq { :~yzDk\I"- if(sHeader.equals("Content-Length")) CE)*qFs { H{ZLk, nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); L>SZgmV+ break; 5v"Y\k+1 } _-n Y2) } Z;hyi'rPJ else A:/}` break; hQXxG/yFm } /T,zZ9= } zVdKYs i^ catch(IOException e){e.printStackTrace ();} VsEGX@;tO catch(Exception e){e.printStackTrace ();} 4<u;a46Z#M DlDB=N0@S MFv
Si Utility.log(nFileLength); VSh !4z1 bZiyapM +4Q[N;[+* return nFileLength; XTV0Le\f } B$ui:R/ t ;TtaH XJUEwX //保存下载信息(文件指针位置) b7bSTFZxC private void write_nPos() bZ/
hgqS { oew|23Ytb try{ qmEoqU output = new DataOutputStream(new FileOutputStream(tmpFile)); z
OtkC3hY output.writeInt(nStartPos.length); f3!n$lj for(int i=0;i<nStartPos.length;i++) h6g:(3t6m { L/BHexOB // output.writeLong(nPos); kfXS_\@iW1 output.writeLong(fileSplitterFetch.nStartPos); >rKhlUD output.writeLong(fileSplitterFetch.nEndPos); 0C]4~F x~ } V7:\q^$ output.close(); r&SO:#rOSM } I:F
<vE catch(IOException e){e.printStackTrace ();} Twx{' S catch(Exception e){e.printStackTrace ();} H<,bq*@ } Uj,g]e8e *6XRjq^# EY~7oNfc`R //读取保存的下载信息(文件指针位置) !
tGiTzzp private void read_nPos() UxeL
cUP { y1iX!m~) try{ ?;^5ghY$ DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); (k8Z=/N~ int nCount = input.readInt(); /_q#ah nStartPos = new long[nCount]; M|k&TTV nEndPos = new long[nCount]; hfg
O for(int i=0;i<nStartPos.length;i++) (etUEb^}T { 45)D+ nStartPos = input.readLong(); };rm3;~ eg nEndPos = input.readLong(); )6=gooe] } wlr Ign% input.close(); 7H%_sw5S. } uJY.5w catch(IOException e){e.printStackTrace ();} S6GMUaR catch(Exception e){e.printStackTrace ();} Wab.|\c } [t{](- .a:Z!KF VD/&%O8n private void processErrorCode(int nErrorCode) 9<l-NU9 _ { 088C| System.err.println("Error Code : " + nErrorCode); Jn*Nao_) } 9:-T@u 0R|K0XH#$ Z(HZB //停止文件下载 D-pX<0-y public void siteStop() >!
oF0R_< { :G}DAUFN bStop = true; 4[1k\ for(int i=0;i<nStartPos.length;i++) 333u] fileSplitterFetch.splitterStop();
%}h`+L
4{Udz! 9 #Y2`pT } ;g9% & } E?Cj/o //负责部分文件的抓取 n+?- **FileSplitterFetch.java :_Fxy5} */ Hd0Xx}3& package NetFox; IBET'!j4" ufPCx|x~ >)^NJ2Fd import java.io.*; <Y>3 import java.net.*; ,eXFN?CB W`x)=y]Z 1~@|eWr| public class FileSplitterFetch extends Thread { RM,'o[% > rw"Rd' OR;&TbWF(R String sURL; //File URL _R74/| long nStartPos; //File Snippet Start Position p+[}Hxx= long nEndPos; //File Snippet End Position >A($8=+#x int nThreadID; //Thread's ID U
Du~2% boolean bDownOver = false; //Downing is over t8vc@of$c, boolean bStop = false; //Stop identical ;&kn"b}G; FileAccessI fileAccessI = null; //File Access interface iNJAZ6@+ 6vobta^w \Yq0 zVol public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException "0-y*1/m { qlUzr.^- this.sURL = sURL; B+46.bIH this.nStartPos = nStart; !
=WcF5 this.nEndPos = nEnd; h<Wg 3o nThreadID = id; ,QvYTJ{ fileAccessI = new FileAccessI(sName,nStartPos);//定位 F7T E|LZ } TatMf;?h& KO&:06V{ H&bh<KPMh public void run() 7/"@yVBW { 6m[9b*s7 while(nStartPos < nEndPos && !bStop) P}@*Z>j:# { a#y{pT2 b =dGKF`tR s}(X]Gx1 try{ El
(/em URL url = new URL(sURL); 8l23%iWxe HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); JZ=5Bpw httpConnection.setRequestProperty("User-Agent","NetFox"); )%VCzye*{ String sProperty = "bytes="+nStartPos+"-"; GV8)Kor% httpConnection.setRequestProperty("RANGE",sProperty); {eR9 ;2! Utility.log(sProperty); {|6z+vR v[&'k\ ,I`_F, InputStream input = httpConnection.getInputStream(); m*oc)x7' //logResponseHead(httpConnection); rzu
s tpYa?ZCM
eYEc^nC,c) byte[] b = new byte[1024]; Hk u=pr3Gn int nRead; ZEGd4_ux while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) /{X_
.fv<v { 85z;Zt0{ nStartPos += fileAccessI.write(b,0,nRead); cZi[(K //if(nThreadID == 1) w>vH8f // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); KlUqoJ;" } d#\W hRE A[H;WKn0 C9jbv/c Utility.log("Thread " + nThreadID + " is over!"); 0H[L S bDownOver = true; pjN:Y] //nPos = fileAccessI.write (b,0,nRead); 5pJ*1pfeo } L~eAQR catch(Exception e){e.printStackTrace ();} bUs|t } t5)J;0/ } TyOH`5D #DUh(:E'` |C D}<r(N
//打印回应的头信息 _M5Xk? e= public void logResponseHead(HttpURLConnection con) *]x_,:R6Ow { a)S7}0|R for(int i=1;;i++) C) .2gQ
G { ce' TYkPM String header=con.getHeaderFieldKey(i); 0JXqhc9' if(header!=null) TpP8=8_Lh //responseHeaders.put(header,httpConnection.getHeaderField(header)); <AUWby," Utility.log(header+" : "+con.getHeaderField(header)); /s[DI;M$o else 'ere!:GJD break; ^,V[nfQR } xvDI 4x& } uvB1VV4 Y=Hz;Ni xR908+>5 public void splitterStop() uRQ_'l { o:UXPAj bStop = true; `^##b6jH } te'*<HM |4Ha?W C4NRDwU|. } If'2rE7J n93zD*;5 6[?}6gQ /* sX:lE^)-z **FileAccess.java XnXb&@Y *//文件访问(定位,写) !Iq{ 5: package NetFox; &1GUi{I import java.io.*; |(ocDmd Z;b+>2oL iP "EA8 public class FileAccessI implements Serializable{ AyTx' u m;/i<:` //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 FFe)e>bH RandomAccessFile oSavedFile; SLoo:) long nPos; 6c<ezEJ Q6^x8 6fwY$K\X public FileAccessI() throws IOException T=\!2gt { )^
<3\e this("",0); ?63&g{vA } \##`pa(8 +v15[^F R]QpMj%o public FileAccessI(String sName,long nPos) throws IOException nY^Nbh0 { d
4O oSavedFile = new RandomAccessFile(sName,"rw"); ;[6&0!N\ this.nPos = nPos; ($WE=biZ& oSavedFile.seek(nPos); qY# d+F,t } nb+m.X <k]qH-v4 8(xw?|D7 public synchronized int write(byte[] b,int nStart,int nLen) i2`0|8mw' { ;V.vfar int n = -1; r4;Bu<PQN1 try{ !T'X
'Q oSavedFile.write(b,nStart,nLen); nq;#_Rkr n = nLen; X~RH^VYv } z\.1>/Z= catch(IOException e) nyhMnp#< { tWD|qg_ e.printStackTrace (); 9?`RR/w } ,{{SI dr})-R o&-L0]i| return n; T-8J } 77Q}=80GU; (0jr;jv #":a6%0Q } JJf<*j^G (5`T+pAsV N z~"vi(t /* AcC8)xRpk4 **SiteInfoBean.java O&$0&dhc */ Iql5T#K+ package NetFox; 0kLEBoOh vA-PR& 3] 76fF\^[ public class SiteInfoBean { {XnPx?V ((MLM3zJ PXEKV0y private String sSiteURL; //Site's URL V5MO} private String sFilePath; //Saved File's Path 6Rz[?-mkLO private String sFileName; //Saved File's Name GGE[{Gb9 private int nSplitter; //Count of Splited Downloading File _ #'9kx|) oR %agvc^^ i\p:#'zk5 public SiteInfoBean() Q4K+*Fi} {//nSplitter的缺省值为5 {Y_Nj`#BT //default value of nSplitter is 5 (9GbG" this("","","",5); &!1}`4$[T } ;KcFy@ 6q5 ?`P2'i<b K{L.ZH>7 public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) Z?1OdoT- { "#S>I8d sSiteURL= sURL; e@jfIF0=} sFilePath = sPath; _D-Riu>#J sFileName = sName; m6U8)!)T this.nSplitter = nSpiltter; s~$zWx@v E`)Qs[?Gk dlD}Ub } :p-Y7CSSu iJP{|-h Z"tQpJg public String getSSiteURL() qrDcL>Hrn { T[2}p=<% return sSiteURL; )%mAZk-*;^ } 3{3/: 7 `clB43i .~`Y)PON public void setSSiteURL(String value) !F7: i { )N)ljA3] sSiteURL = value; rYGRz#:~+ } hKksVi g42T#p8^ 4v qNule public String getSFilePath() _A-V@%3 { ~3=2=Uf return sFilePath; /DU*M, } kxo.v |)8 \cZfg%PN 8p=>?wG public void setSFilePath(String value) iz`jDa Q|1 { V^En8 sFilePath = value; cU+>|'f& } 93D
\R kZ[mM'u# ]^@0+! public String getSFileName() e@j8T
gI) { I,j3bC return sFileName; hTw}X.<4 } %dmfBf Ev Uu5C%9^s pUL sGb public void setSFileName(String value) |s|/]aD}o { e2Jp'93o' sFileName = value; 8^X]z|[d2 } },PBqWe {!=2<-Aq Hsl{rN
public int getNSplitter() ragSy8M { Dl\d_:+ return nSplitter; Dh`=ydI5 } 3!Bj{;A xOIg|2^8 BKA]G)G7u! public void setNSplitter(int nCount) XGIpUz { wLMvC{5 nSplitter = nCount; bi,mM,N/ } mP!N<K } 0N VI+Z$ : bv|Ah q6&67u0 /* -eL'KO5' **Utility.java /f&By
p */ b *9-}g: package NetFox; `a'`$'j k1iLnza% ('d{t:TsY public class Utility { b42QBTeg XRa#21pQ T} 8CfG_j public Utility() <gcmsiB| { o)!m$Q~v owMmCR oD,C<[(p }
UTX](:TC wlVvxX3% //线程睡眠 BWEv1' v public static void sleep(int nSecond) sVoR?peQ { <[9?Rj@ try{ (nz}J)T& Thread.sleep(nSecond); :c<*%*e } SG`)PW? catch(Exception e) #eLN1q&Z { OPiaG!3< e.printStackTrace (); M.[wKGX( } K;C_Z/<% } P;c0L;/ (H-cDsh;c //日志 {]["6V6W public static void log(String sMsg) *(nJX.7 { 5H!%0LrJg= System.err.println(sMsg); WRM$DA } \n(ROf^' wA",SBGX y.ql#eQ, public static void log(int sMsg) .C?GW1[c~@ { >)y$mc6 System.err.println(sMsg); YkI9d&ib+ } 4k$0CbHx0 } 97]4
:Zv Y?t2,cm
`EVg'?pl /* H9E(\)@ **TestMethod.java R8uj3!3^ */ ~#t*pOC5BR package NetFox; kF2Qv.5! j"6:A >KHp-|0pv public class TestMethod { ,-:a?#f> P57GqT EW9b*r7./ public TestMethod() g? I!OG { ///xx/weblogic60b2_win.exe ?OO%5PSe n try{ ^Po,(iIn SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); )-#i8?y3C //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); `:gYXeR SiteFileFetch fileFetch = new SiteFileFetch(bean); yU!GS- fileFetch.start(); {\Ys@FF } @E(P9zQ/zy catch(Exception e){e.printStackTrace ();} V" }*"P-% _<2RYXBC }Az'Zu4 = } z \^ Se/ss!If N-Z^G<[q. public static void main(String[] args) ^Rk^XQCh { %GVN4y& new TestMethod(); ) H+d.Y } ETg{yBsp } HSC6;~U 点击下载更多相关资料
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