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/* `Hv"^o **SiteFileFetch.java ]"YXa~b */ 78<fbN5}r package NetFox; oz[G'[\}F import java.io.*; ;TwqZw[. import java.net.*; i.eMrzJ| O'.{6H;t sb1tQ=u[ public class SiteFileFetch extends Thread { Ox)_7A xo n^=Wo; wAzaxeV= SiteInfoBean siteInfoBean = null; //文件信息Bean jIHY[yDT long[] nStartPos; //开始位置 322-'S3< long[] nEndPos; //结束位置 ed3wj3@ FileSplitterFetch[] fileSplitterFetch; //子线程对象 }g|9P SbJ long nFileLength; //文件长度 / T_v8{D boolean bFirst = true; //是否第一次取文件 O`N,aYo boolean bStop = false; //停止标志 O#>,vf$ File tmpFile; //文件下载的临时信息 :!fY;c? DataOutputStream output; //输出到文件的输出流 1]A\@( G
Uh<AG*+ //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) V%C'@m(/SZ public SiteFileFetch(SiteInfoBean bean) throws IOException >fkV65w{* { ?[WUix; siteInfoBean = bean; -yu$Mm //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); P=y1qqC tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); 3Q )" if(tmpFile.exists ()) \8vZZ t { `bn@;7`X bFirst = false;
-*-"kzgd read_nPos(); 4$ah~E>,t } LfCgvq6/pO else MI.OOoP3a { U_E t nStartPos = new long[bean.getNSplitter()]; i3Xo6!Q nEndPos = new long[bean.getNSplitter()]; b.}J'?yLm } Eq=JmO'gHs -$@'@U Ywcgt| q6%m .X7 } km`";gUp> Pi,86? iuM ,aF public void run() rsw=a_S { 2n#H%&^?a //获得文件长度 }/IP\1bG //分割文件 oJ#;X R //实例FileSplitterFetch y`/:E<fVk //启动FileSplitterFetch线程 :x^e T //等待子线程返回 e"p){)*$ try{ ec*Ni|`Z' if(bFirst) 9J<vkxG9` { jxYze/I nFileLength = getFileSize(); 1,we:rwX if(nFileLength == -1) 1$:O9{F { mQ<Vwx0 System.err.println("File Length is not known!"); i~5'bSqc } 1:u~T@;" ` else if(nFileLength == -2) XXD4T9Wy { "{~^EQq, System.err.println("File is not access!"); J'L6^-gV } SaRn>n\ else d4A:XNKB { Q#&6J =} for(int i=0;i<nStartPos.length;i++) 0fV}n:4Pq { ?f!&M nStartPos = (long)(i*(nFileLength/nStartPos.length)); e. E$Ej]w } Kv#Q$$)r for(int i=0;i<nEndPos.length-1;i++) `nc=@" 1 { fN9uSnu
nEndPos = nStartPos[i+1]; TIF =fQ } e#WASHZN nEndPos[nEndPos.length-1] = nFileLength; OL@$RTh } {"rL3Lk } zqRps8= ^
7)H;$ |f$gQI!XW //启动子线程 ]9wTAb fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; ogV v 8Xb for(int i=0;i<nStartPos.length;i++) |F qujZz {
?dk)2 fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), ,WAJ&
'^ siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), [EQTrr(
D nStartPos,nEndPos,i); rV*Ri~Vx Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); 9pk-#/ag fileSplitterFetch.start(); s>{\^T7y } zOy_qozk // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), R[QBFL< siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); )L_@l5l // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", /U6ry' nEndPos = " + nFileLength); tvUC d} // fileSplitterFetch[nPos.length-1].start(); vJX0c\e e YiqT Wn: 'HL.W]( //等待子线程结束 $wl_ //int count = 0; '+*'sQvH[ //是否结束while循环 x}{O9LiR boolean breakWhile = false; sy6[%8D$ c68,,rJO]i i\#?M " while(!bStop) r=]$>& { L_M(Lj write_nPos(); [<jU$93E Utility.sleep(500);
Yq{R*HO breakWhile = true; 8RS@YO @R`Ao9n9V 0])[\O`j for(int i=0;i<nStartPos.length;i++) 8}Q2!,9Q { Q0g^% if(!fileSplitterFetch.bDownOver) S2#@j#\ { aeEio;G1 breakWhile = false; R\x3'([A5 break; #f_. } F^?DnZs } E7I$GD if(breakWhile) m+x$LkP break; [&lH[:Y# g]d0B!Ar~ >^ E*7Bfp //count++; 0L d"df* //if(count>4) j&q%@%Gm // siteStop(); =i},$"Bf*% } | _nBiHjNn K :>O X e^N}(Kpy System.err.println("文件下载结束!"); 0="wxB } {??bJRT catch(Exception e){e.printStackTrace ();} ezS@`_pR; } N).'> X]=8Oa RxVZn"" //获得文件长度 u7},+E)+B public long getFileSize() WfYG#!}x { N%)q.'M int nFileLength = -1; l;B try{ `(E$-m-~jH URL url = new URL(siteInfoBean.getSSiteURL()); ,G[Y< ~Hy HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); a&7uRR26 httpConnection.setRequestProperty("User-Agent","NetFox"); VDiW9] &7r a b&9~F6aM int responseCode=httpConnection.getResponseCode(); OMBH[_ if(responseCode>=400) x
}]"jj2x { W<$!H
V$ processErrorCode(responseCode); |FSp`P return -2; //-2 represent access is error F'T.-lEO_d } X3?RwN:P Zb:Z,O(vn D[Q/:_2l String sHeader; 2G_]Y8 /-+hMYe 7j88^59 for(int i=1;;i++) Z,V<&9a; { K87yQOjPv //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); F?qg?1vB| //Utility.log(in.readLine()); RNt9Qdr4y sHeader=httpConnection.getHeaderFieldKey(i); '($$-P\/ if(sHeader!=null) %l!-rXp { ZVrZkd` if(sHeader.equals("Content-Length")) fm!\**Q1 { |OuIQhoE nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); ZX'3qW^D break; `^|l+TJG } 20I/En } e`Co =' else Of}C.N8 break;
?P/73p } 7R5+Q\W } e$&n)>% catch(IOException e){e.printStackTrace ();} 5<P6PHdY catch(Exception e){e.printStackTrace ();}
*U`R<mV\ LCuz_LTFq{ 2rb@Md]dx Utility.log(nFileLength); [GcW*v yq[@Cw ZH~Wn#Wp return nFileLength; DcE4r>8B } |7${E^u 8\jsGN.$JZ &=XK:+ //保存下载信息(文件指针位置) k *>"@ private void write_nPos() 7xfS%'=y" { 3$.#\*s_4 try{ \s!x;nw[ output = new DataOutputStream(new FileOutputStream(tmpFile)); pF(6M3>IN output.writeInt(nStartPos.length); #$F*.vQSs+ for(int i=0;i<nStartPos.length;i++) kdaq_O:s { M`E}1WNQ?] // output.writeLong(nPos); 1MmEP output.writeLong(fileSplitterFetch.nStartPos); Qj$w7*U output.writeLong(fileSplitterFetch.nEndPos); wJ"]H!r0 } nj1PR`AE output.close(); 3eB)X2~ } p|@#IoA/e catch(IOException e){e.printStackTrace ();} fB]NEx|o~ catch(Exception e){e.printStackTrace ();} CTxP3a9] } {qOqtkj CyXaHO }Yc5U,A; //读取保存的下载信息(文件指针位置) lQy-&d|=#^ private void read_nPos() |kTq
&^$ { W Bb*2 try{ +r&:c[ DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); /y6I I$AvM int nCount = input.readInt(); S#<y_w% nStartPos = new long[nCount]; JoZSp"R nEndPos = new long[nCount]; ;lfv.-u:< for(int i=0;i<nStartPos.length;i++) :Gew8G { 12;YxW>[ nStartPos = input.readLong(); )uMv] nEndPos = input.readLong(); UcH#J &r } [ako8 input.close(); wvxsn!Ao&= } ;>S|?M4GZ catch(IOException e){e.printStackTrace ();} Q7i(M >|O catch(Exception e){e.printStackTrace ();} be$']}cP } 9A/bA|$
9%bErMHL *LuRo private void processErrorCode(int nErrorCode) 4C;y2`C { Kr;=4xg= System.err.println("Error Code : " + nErrorCode); G*jq5_6 } +L@\/=;G <lLJf8OK M?GkHJ %! //停止文件下载 R1eWPtWs public void siteStop() z^s\&gix { USS%T<Vk bStop = true; ]Qa|9G,b for(int i=0;i<nStartPos.length;i++) WW2hwB( fileSplitterFetch.splitterStop(); i0J`{PbI :,g]Om^ sZEa8 } B9%%jEH* } dZI["FeO&d //负责部分文件的抓取 ^@{"a **FileSplitterFetch.java *u",-n */ <]X6%LX package NetFox; 9X
+dp FFN Sn L./c#b!{ import java.io.*; g-1j#V`5 import java.net.*; \CVHtV Xo&\~b#- "a3?m) public class FileSplitterFetch extends Thread { H8=:LF !l Egta[Ql F^aD# String sURL; //File URL WtaOf_ long nStartPos; //File Snippet Start Position `j!_tE` long nEndPos; //File Snippet End Position y7%SHYC p[ int nThreadID; //Thread's ID 9NNXj^7 boolean bDownOver = false; //Downing is over i5&,Bpfo- boolean bStop = false; //Stop identical $EEn]y
FileAccessI fileAccessI = null; //File Access interface ST;o^\B `w`F-ke]I =LKM)d=1 public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException E|+<m! { %g{)K)$,ui this.sURL = sURL; {cb<9Fii this.nStartPos = nStart; ;r&Z?B$ this.nEndPos = nEnd; s9OW.i]zX nThreadID = id; 4nQ5zwiV fileAccessI = new FileAccessI(sName,nStartPos);//定位 M ?AX:0 } 1ltW9^cF} p>#q* eU5 DEt!/a{X public void run() K+XUC { %5DM ew while(nStartPos < nEndPos && !bStop) e-[PuJ { SynRi/BRmw qxsHhyB_n; BW}M/ try{ r4DHALu#) URL url = new URL(sURL); qvK/} HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); !n P4S)A httpConnection.setRequestProperty("User-Agent","NetFox"); Q\T?t String sProperty = "bytes="+nStartPos+"-"; ^8J`*R8CL httpConnection.setRequestProperty("RANGE",sProperty); 6EO@Xf7, Utility.log(sProperty); VX>j2Z' 6x=w-32+ y nMfR<%r InputStream input = httpConnection.getInputStream(); }6<5mq)% //logResponseHead(httpConnection); [u37Hy_Gi 6-0sBB9=u BV
}CmU&DA byte[] b = new byte[1024]; ] $r].,& int nRead; yT5OFD|T while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) yU4mS;GX { } .Z` nStartPos += fileAccessI.write(b,0,nRead); 9V[}#(f$ //if(nThreadID == 1) gIusp917 // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); 0@{0#W3R } *Uj;a. k0#s{<I]E h]+;"v6 / Utility.log("Thread " + nThreadID + " is over!"); \E<Qi3W>* bDownOver = true; i/H;4#Bz //nPos = fileAccessI.write (b,0,nRead); H(P]Z~et } >]xW{71F@ catch(Exception e){e.printStackTrace ();} hITYBPqRO } 1 ]
cLbJ } .4tu{\YX P:N>#G~z FfrC/"N //打印回应的头信息 t[|t0y8 public void logResponseHead(HttpURLConnection con) <hiv8/)? { ViMl{3 for(int i=1;;i++) aq8./^ { UnP<`z# String header=con.getHeaderFieldKey(i); D,[Nn_N if(header!=null) ]'M B3@T //responseHeaders.put(header,httpConnection.getHeaderField(header)); ]Y!Fz<-;P Utility.log(header+" : "+con.getHeaderField(header)); \w>Rmf'| else .P/0`A{& break; Ui" {0% } _q4O2Fx0 } $/tj<++W eq(h{*rC 1"75+Q>D public void splitterStop() WFFQxd|Z { ~:o$}`mW bStop = true; 'SoBB: } 5`+9<8V >1;jBx>Qy% ]+3M\ ib } C;K+ITlJ 7pQ5`;P c%^B
' /* \k`9s
q **FileAccess.java unew
XHA *//文件访问(定位,写) |N"K83_pr package NetFox; W Zm8!Y import java.io.*; czpu^BT;;T }2"W0ZdWD w0oTV;yh public class FileAccessI implements Serializable{ CEaAtAM E;x-O)(& //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 , QWus"5H RandomAccessFile oSavedFile; W02z}"# long nPos; v<g=uEpN l~f3J$OkJ oYTLC@98} public FileAccessI() throws IOException ~%g,Uypi { ,d38TN this("",0); zIu/!aw } *jWh4F, f$kbb6juL G'#u!<(^h public FileAccessI(String sName,long nPos) throws IOException fRLA;1va { +hr|$ oSavedFile = new RandomAccessFile(sName,"rw"); l!Xj UnRF this.nPos = nPos; +~aIT=i3 oSavedFile.seek(nPos); `PL}8ydZ } N>"L2E=z$| Z_4%Oi *AW v public synchronized int write(byte[] b,int nStart,int nLen) fW+"Kuw { {d;z3AB int n = -1; a{Y|`*7y try{ 3en67l oSavedFile.write(b,nStart,nLen); l5Ko9CG n = nLen; aF+Lam( } [J}eNprg catch(IOException e) ?HZ^V { Y
z&!0Hfd e.printStackTrace (); d7[^pN } 1G5AL2 G~(\N?2 t,JX6ni return n; R@z` } 2p\xgAW? wn! =G~nB J8r8#Zz } E>tHKNyVTp JfSe;
v ox&?`DO /* eS@j? Y0y **SiteInfoBean.java M.}J SDt */ kBcTXl package NetFox; ]bh%pn cl`Wl/Q# >.`*KQdan public class SiteInfoBean { vr4r,[B6y h+j^VsP zB z{\tn.67 private String sSiteURL; //Site's URL `14@dk
private String sFilePath; //Saved File's Path }BI6dZ~2A private String sFileName; //Saved File's Name y,|2hrj/0E private int nSplitter; //Count of Splited Downloading File s9CmR]C CZu=/8? BQ Vro;#Jc public SiteInfoBean() QJ(%rvn3 {//nSplitter的缺省值为5 =LV-n //default value of nSplitter is 5 U!r8}@ this("","","",5); XK3O,XM } ^O@eyP B!x#|vGXL l+P!I{n public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) b)KEB9w { `MPR-"Z6 sSiteURL= sURL; "q M sFilePath = sPath; i56Rdb sFileName = sName; FsWp>}o this.nSplitter = nSpiltter; WVpx Oj _]` qna!j|90Lp } )M+po-6$1 {!wW,3|Pu HYGd
:SeH public String getSSiteURL() p:y\{k" { =O0A(ca"g return sSiteURL; Vlz\n } Lg!E K=0xR*ll5 4sQm"XgE public void setSSiteURL(String value) '=Zm[P, { DoQ^caa@ sSiteURL = value; ;6pB7N } ):>?N`{V k6ry"W3 YAT@xZs- public String getSFilePath() 7,p.M)t) { ^Z9bA( w8 return sFilePath; Lr:n } B//*hH >F z/4<x?}+hE Uvm.|p_V public void setSFilePath(String value) I@Hx
LEGj { iu8Q &Us0P sFilePath = value; 96~y\X@x } LJPJENtFIs "zY~*3d (BP p2^ public String getSFileName() ZwsQ}5 { {v]L|e%{ return sFileName; B3&C&o.h } ddKP3} BT8)t.+pv :s_.K'4?a public void setSFileName(String value) : H;S"D { iE"]S ) sFileName = value; |}:}14ty } &nr{-][ ^P~,bO&H.Z _|12BVq public int getNSplitter() 8e>B>'nH { jXf@JxQ return nSplitter; )e3w-es~4 } DmuQE~DV p
P@q
` i*:QbMb public void setNSplitter(int nCount) rbdrs { @H#Fzoo. nSplitter = nCount; ,}'8.
f } oH0g>E; } jnOnV1I" Lw[=pe0e 5\h 6"/6Df /* Pv2uZH( **Utility.java RN)XIf$@_ */ r&a}U6k(y package NetFox; Wfd`v SF;\*]["f fn
'n'X| public class Utility { C=o-3w
,i}EGW,9q )-5e Iy public Utility() )-[$m% { WZ6{9/%: SS%Bde&<{ ]N]Fb3 } 9FSa=<0wE mB>0$l y //线程睡眠 9HFEp-" public static void sleep(int nSecond) PZ6R+n8 { Q`8-|(ngw try{ 98u@X:3 Thread.sleep(nSecond); e.MyJ:eL } eC<RM Q4 catch(Exception e) sjLMM_' { OW};i| e.printStackTrace (); Rl cL(HM } +%9Re5R } b`+yNf Ix_w.f=8 //日志 k%~;mu"4} public static void log(String sMsg) Bq)dqLwk { 4Us,DS_/ System.err.println(sMsg); In?+ } v=G*K11@ wX2U
o NA ]G] public static void log(int sMsg) $S<B\\
% { /d|: System.err.println(sMsg); i9Bh<j>:J } j"~"-E(79 } ~{{S<S
v x#SE%j? M.dX;iM< /* ^g(qPtQ **TestMethod.java o%j?}J7y */ C1_0 9Vc package NetFox; [7PC\ fWA#n >F7HKwg}Z public class TestMethod { H%l-@::+$ C;:=r:bth (=u!E+N public TestMethod() bnkZWw'9 { ///xx/weblogic60b2_win.exe *FEJ5x try{ )=gU~UV SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); +p>h` fc //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); BhAT@% SiteFileFetch fileFetch = new SiteFileFetch(bean); 2 ^"j]g>mj fileFetch.start(); H0OO+MCe } 1ED7.#g catch(Exception e){e.printStackTrace ();} IfB .2e` Z}0{FwW"4 M .6BFC } qZ>_{b0f TDk[,4 8 0nu^_ public static void main(String[] args) Zl9 { T&/n.-@nk new TestMethod(); cz/E } Q{S{|.w- } $LuU 点击下载更多相关资料
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