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/* VVP:w%yW **SiteFileFetch.java \>QF(J [8 */ n\z,/'d" package NetFox; Z|"p*5O, import java.io.*; j _L@U2i import java.net.*; ,#?uJTLH T"7~AbgNU y:m_tv0~0 public class SiteFileFetch extends Thread { &0zT I?c a^d8I :j }fC8' SiteInfoBean siteInfoBean = null; //文件信息Bean zOgTQs"ZH long[] nStartPos; //开始位置 L2Pujk long[] nEndPos; //结束位置 uvP2Wgt FileSplitterFetch[] fileSplitterFetch; //子线程对象 6(d }W2GP long nFileLength; //文件长度 Rp7ntI: boolean bFirst = true; //是否第一次取文件 rE9I>|tX boolean bStop = false; //停止标志 G6@M&u5RT File tmpFile; //文件下载的临时信息 =L;] ;i DataOutputStream output; //输出到文件的输出流 I`KQ|h0% _BdE<
!r //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) kHw_ S- public SiteFileFetch(SiteInfoBean bean) throws IOException Bw%Qbs0Q { +5VLw siteInfoBean = bean; *}k;L74| //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); ^sN ( tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); yeDsJ/L if(tmpFile.exists ()) ^V$Ajt { a<}#HfC;' bFirst = false; ]0hrRA` read_nPos(); Mj[f~ } B(xN Gs else >{\7&}gz { ./Q, nStartPos = new long[bean.getNSplitter()]; %NL^WG: nEndPos = new long[bean.getNSplitter()]; ;bHV } _=CZR7:O !aO` AC=5u [(1c<b2r 9z)5Mdf1j } ]BR,M4 U!U$x74D5 sVG(N.y public void run() ?T+q/lt4 { 2^8%>, //获得文件长度 cuy1DDl //分割文件 zg-2C>(6a //实例FileSplitterFetch x#Sqn# //启动FileSplitterFetch线程 F 8B#}%JE //等待子线程返回 g1t0l%_7^ try{ ,U(1NK8o if(bFirst) AL>$HB$ { Jgnhn>dHe nFileLength = getFileSize(); ?QE,;QtpK if(nFileLength == -1) [1.+HyJ} { @v}/zS System.err.println("File Length is not known!"); UTXSeNP } g8PTGz else if(nFileLength == -2) (?nCyHC%g { _h}kp\sps System.err.println("File is not access!"); `ZC<W]WYX/ } EkziAON else jH_JmYd { $56,$K`H for(int i=0;i<nStartPos.length;i++) xyI}y(CN1 { /7gOSwY nStartPos = (long)(i*(nFileLength/nStartPos.length)); As>_J=8} 3 } ?lP':'P for(int i=0;i<nEndPos.length-1;i++) 9K1oZ?)_z { %2v4<icvq nEndPos = nStartPos[i+1]; ,\NFt`]j } lok= nEndPos[nEndPos.length-1] = nFileLength; \L"kV!> } =UV`.d2[ } u*hSj)vr1 >$4d7.^hb/ !"Oh36 //启动子线程 cTG|fdgMW fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; IIbYfPiO for(int i=0;i<nStartPos.length;i++) W*2U="t { |P%Jw,}]9 fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), >y,-v:Vy siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), %n*-VAfE\ nStartPos,nEndPos,i); aA,!<^&} Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); K.0:C`C fileSplitterFetch.start(); Hw4%uS==V } M3q|l7|9 // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), x)@G;nZ siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); w!D|]LoE // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", irfp!(r nEndPos = " + nFileLength); 6fw(T.Pe // fileSplitterFetch[nPos.length-1].start(); DY`kx2e! N0r16# -g [sW3l:^ //等待子线程结束 j:VbrR //int count = 0; b9l;a+]d //是否结束while循环 *6VF
$/rP boolean breakWhile = false; fZoHf\B]{ >Z5gSs0 :\|SQKD while(!bStop) >6?__v]9G { 62zYRs\Y)X write_nPos(); 9gmW&{6q Utility.sleep(500); !_Wi!Vr_ breakWhile = true; a24"yT sfNE68I2 u?}(P_9 for(int i=0;i<nStartPos.length;i++) n^g|Ja { (=om,g} if(!fileSplitterFetch.bDownOver) maNl^i { 3eF-8Z(f breakWhile = false; r [*Vqcz break; va0{>Dc+ } sr{a(4*\ } 6}!#;@D~ if(breakWhile) *+#8mA( break; J|qZ+A[z @"^0%/2- WHj'dodS //count++; 2I,^YWR //if(count>4) 9J2NH|]c // siteStop(); ++^l]8 } fSokm4]vg =Lf,?"S XzEc2)0'v System.err.println("文件下载结束!"); eLfk\kk]Pc } 7Mg=b%IYs catch(Exception e){e.printStackTrace ();} $adbCY\ } 6V7B;tB )!P)U(*v U`2e{>'4t //获得文件长度 #
mV{#B= public long getFileSize() 9[.8cg* { >LOjV0K/
int nFileLength = -1; pu2tY7Ja try{ G?Q3/y( URL url = new URL(siteInfoBean.getSSiteURL()); kH
G"XTL HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); Q$zO83 httpConnection.setRequestProperty("User-Agent","NetFox"); |Uc_G13Y{D xe^Gs]fm ,X`)ct int responseCode=httpConnection.getResponseCode(); sTn<#l6 if(responseCode>=400) hHV";bk {
zem8G2#c processErrorCode(responseCode); "eB$k40- return -2; //-2 represent access is error uM_wjP } hhCrUn" hEKf6# JvVWG'Z" String sHeader; cj$[E]B3V* Ab{ K<:l W04@!_) < for(int i=1;;i++) x|pg"v&[ { RBs-_o+ % //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); Vf]
"L.G //Utility.log(in.readLine()); A#EDkU,
sHeader=httpConnection.getHeaderFieldKey(i); 1H6<[iHW if(sHeader!=null) "@iK'
c^ { :bwjJ}F if(sHeader.equals("Content-Length")) pKpUXfQu { X-K=!pET nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); {zQ8)$CQ break; ChGYTn`X } au:
fw } _Xk.p_uh else -?V-*jI break; bk;?9%TW } H[,i{dD } +BETF;0D catch(IOException e){e.printStackTrace ();}
TQpf Q catch(Exception e){e.printStackTrace ();} dfKF%27 ,!#*GZ.ix C~2F9Pg Utility.log(nFileLength); jB%lB1Q| n<O}hM ZT vHryPl+ return nFileLength; }$SavB#SBP } (l^3Z3zf& ,,%i; <m)$K //保存下载信息(文件指针位置) D$
dfNiCH private void write_nPos() Xg|B \\ { /:~\5}tW try{ 6e9,PS output = new DataOutputStream(new FileOutputStream(tmpFile)); ,)Me output.writeInt(nStartPos.length); MQ5R O;RY for(int i=0;i<nStartPos.length;i++) *>7 >g" { m% -g ~q // output.writeLong(nPos); j*so9M6|c output.writeLong(fileSplitterFetch.nStartPos); HN=V"a output.writeLong(fileSplitterFetch.nEndPos); Pg,b-W?n* } dJJP3}M/ output.close(); Q=;U@k@> } Mo?~_|} catch(IOException e){e.printStackTrace ();} V58wU:li catch(Exception e){e.printStackTrace ();} *|%@6I( } =,spvy'"*C yu!h<nfzA Ugu[|, //读取保存的下载信息(文件指针位置) A9I{2qW9+Z private void read_nPos() 8@i7pBl@ { $HHs ^tW try{ :W!7mna DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); ]m
g)Q:d, int nCount = input.readInt(); G&D7a/G\ nStartPos = new long[nCount]; qE&v ; nEndPos = new long[nCount]; YVQN&|- for(int i=0;i<nStartPos.length;i++) BLfTsNzmt { *scVJ nStartPos = input.readLong(); C7lH]`W|/ nEndPos = input.readLong(); '\Giv!> } {> eXR?s/ input.close(); "c3Grfoz } 0b+Wc43}K catch(IOException e){e.printStackTrace ();} Jj!vh{ catch(Exception e){e.printStackTrace ();} (G zb } "6MVvpy" "& ])lz[u CR8/Ke private void processErrorCode(int nErrorCode) wvO|UP H\ { MLw7}[ System.err.println("Error Code : " + nErrorCode); l~c@^! } sGyeb5c [Y|8\Ph`& ~ELNyI11 //停止文件下载 =XA;[PVx:# public void siteStop() UW N*j_9i { Oft-w)cYz, bStop = true; -I*^-+>H for(int i=0;i<nStartPos.length;i++) qkt0**\ fileSplitterFetch.splitterStop(); =
s>T;| zKw`Md .aO,8M } &+Z,hs9% } !\zWF //负责部分文件的抓取 ?5C!<3gM) **FileSplitterFetch.java LPZF)@|` */ *7CV^mDm package NetFox; :[wsKFaV+ Lm*e5JnV F"&~*m^+ import java.io.*; ]NUl9t*N4 import java.net.*; JlH&?? {G U&a xf<at -> public class FileSplitterFetch extends Thread { `|6'9 WKC.$[T= veMH String sURL; //File URL /qMG=Z long nStartPos; //File Snippet Start Position "@%7 -nu long nEndPos; //File Snippet End Position 0H6(EzN int nThreadID; //Thread's ID i!J8 d" boolean bDownOver = false; //Downing is over S=5<^o^h3 boolean bStop = false; //Stop identical OVm\ FileAccessI fileAccessI = null; //File Access interface X &uTSgN AJh w }+)fMZz public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException wT;0w3.Z { (}{G`N>.{ this.sURL = sURL; uD\?(LM this.nStartPos = nStart; <v)1<*I this.nEndPos = nEnd; DK$X2B"c V nThreadID = id; JLnH&(O fileAccessI = new FileAccessI(sName,nStartPos);//定位 cJ{ Nh;" } I;e=0!9U &ib5*4! ,5i` -OI public void run() W#^2#sjO { 0t Fkd while(nStartPos < nEndPos && !bStop) ^A!Qc=#z} { 4]yOF_8h _"E%xM*r E)TN,@% try{ 6VS4y-N URL url = new URL(sURL); ~D<IB#C HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); D&od?3}E httpConnection.setRequestProperty("User-Agent","NetFox"); "Ue.@> String sProperty = "bytes="+nStartPos+"-"; Mmxlp.l httpConnection.setRequestProperty("RANGE",sProperty); 5*+!+V^?X Utility.log(sProperty); Kf>A\l^X7 C>-aIz!y fmQ_P.c InputStream input = httpConnection.getInputStream(); BcL{se9< //logResponseHead(httpConnection); R9'b-5q Jy)KqdkX+ D ~stM byte[] b = new byte[1024]; kO,zZF& int nRead; V}J)\VZ2# while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) <vUbv { Z3#P,y9@ nStartPos += fileAccessI.write(b,0,nRead); U}6B*Xx' //if(nThreadID == 1) qs1 ?IYD // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); 4A8;tU$& } G'oG</A syWG'(> O#F Utility.log("Thread " + nThreadID + " is over!"); 4,sJE2"[9 bDownOver = true; \DYWy*pe //nPos = fileAccessI.write (b,0,nRead); W }8'Pf } w\(.3W7 catch(Exception e){e.printStackTrace ();} NL!u<6y } ABQa 3{v } OjFLPGRCh /q<__N &:/hrighH //打印回应的头信息 TV<'8L public void logResponseHead(HttpURLConnection con) R%{a1r>9h { Rtb7| for(int i=1;;i++) K@sV\"U(*E { f({Ei`| String header=con.getHeaderFieldKey(i); {{B%f. if(header!=null) ix([mQg //responseHeaders.put(header,httpConnection.getHeaderField(header)); q#T/
Utility.log(header+" : "+con.getHeaderField(header)); Hc>m;[M)l else gG]Eeu+z
break; H| 8Qp* } >d,jKlh^.% } Z1 Bp+a3 6A>dhU 3
^>l\, public void splitterStop() byLft1 { b:Wm8pp? bStop = true; xCg52zkH# } ox(j^x]NC <}E!w_yi pnjXf.g"O } C1jHz /DK"QV!]s qHuZcht /* v-#Q7T **FileAccess.java #pb92kA' *//文件访问(定位,写) e4!:c^? package NetFox; X' d9[). import java.io.*; )\eI;8 %+j8["VEC ]~aF2LJ_q public class FileAccessI implements Serializable{ QWD'!)Zb xD5:RE~g //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 j/fzzI0@ RandomAccessFile oSavedFile; eM$s v9? long nPos; [Jogt#Fj ] 0vtt"f)Y[ %/|9@e r public FileAccessI() throws IOException W+PJZn { HkO7R
` this("",0); *VFf.aPwYi } g+pml*LJ _CmOd-y vbb5f #WZ public FileAccessI(String sName,long nPos) throws IOException )2bvQy8K { 4x oSavedFile = new RandomAccessFile(sName,"rw"); (#Wu#F1; this.nPos = nPos; 1DE1.1 oSavedFile.seek(nPos); ;A]@4*q } {@+Ty]e Yzh"1|O 0\[Chja public synchronized int write(byte[] b,int nStart,int nLen) 2 lj'"nm { MRb-H1+Xf int n = -1; OR%'K2C6S try{ U%<koD[, oSavedFile.write(b,nStart,nLen); d/[;
`ZD+ n = nLen; }s(N6 a&( } ~\Hc,5G catch(IOException e) EdlTdn@A { <kGU,@6PF e.printStackTrace (); 3QG7C{ } K_RjX>q%N +89*)pk 1guJG_;z return n; | N[<x@ } t5y;CxL -( bYEy<7)x } iV&6nh( x4E7X_ )n2 re?S /* %Z):>' **SiteInfoBean.java *=(lyx_O */ gDQ1?N'8{t package NetFox; 9y<*8bI d@5[B0eH L<ue$' public class SiteInfoBean { 1][4.}?F[ !HnXXVW nQ5n-A&[" private String sSiteURL; //Site's URL _F$aUtb%O private String sFilePath; //Saved File's Path VU&7P/\f% private String sFileName; //Saved File's Name U<DZ:ds?T private int nSplitter; //Count of Splited Downloading File Cj{1H([- }+C2I 4lKq{X5< public SiteInfoBean() ?QFpv#4 {//nSplitter的缺省值为5 wVEm:/;z& //default value of nSplitter is 5 AaWs}M this("","","",5); uTKD 4yig } 2QJ{a46} _$
+^q- P_*" dza public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) z^#;~I @M { KX'{[7}m' sSiteURL= sURL; *7ZN]/VRT sFilePath = sPath; a1_GIM0 sFileName = sName; Jl#%uU/sx this.nSplitter = nSpiltter; vb<oi&X Y8-86 *zC f;W|\z' } 7?GIS ' 8B\2Zfe
^,/RO5 public String getSSiteURL() .k%[4:Fe { ?~hHGf\^b6 return sSiteURL; Qo;zHZ' } VJickXA {<R2UI5m5 auK?](U public void setSSiteURL(String value) 'VzP}; { q|!-0B@ sSiteURL = value; e=B|==E10M } 6L"%e!be6 qz0;p=$8Z Y]/%t{Y public String getSFilePath() ,
udTvI { }bdmomV return sFilePath; e?JW } i36eBjT SL#0kc0x _"bHe/'CI public void setSFilePath(String value) &jslyQ# { mID"^NOi# sFilePath = value; 3?V_BUoON } c'%-jG)\ nxWY7hU ]:Nsf|C0 public String getSFileName() Yu)NO\3& { f!I[>&n return sFileName; ^c^#dpn } Fcd3H$Na; ST:A<Da" IC1NKn<k public void setSFileName(String value) @~!wDDS { 8FKXSqhVM sFileName = value; 5=v}W:^v. } RS)tO0 '98VYCL kEOS{C%6R public int getNSplitter() "B3N*R([" { bdC8zDD return nSplitter; mS(fgq6 } UNom- Ta(Y:*Ri S-
pV_Ff public void setNSplitter(int nCount) K/i*w<aPb7 { *h!28Ya(~ nSplitter = nCount; r+":' /[x } v"b+$* } K{|p~B 2R;}y7{ @D{KdyW /* $c]fPt"i **Utility.java 9N@W\DT */ ,z;cbsV-{ package NetFox; &O9 |#YUq H`1{_ bM {s
T" public class Utility { 0ZZZoPo %E#s\B,w Gft%Mq
v public Utility() LhOa{1SY { +jS|2d Sdt`i !W5 ( } qU%/W|LY nuk*.Su //线程睡眠 =Xi07_8Ic< public static void sleep(int nSecond) v|uAzM{73 { ABQ('#78 try{ oW ::hB Thread.sleep(nSecond); s5CXwM6cx } 7
n8"/0kc: catch(Exception e) fI&t] {
coW:DFX e.printStackTrace (); &;^YBW :I } z\K"Rg~J } yE:+Lo`> R=gb' //日志 lR )67a public static void log(String sMsg) ,?>s>bHV { X:HacYqtC System.err.println(sMsg); >/l? g5{ } i,>khc K#6P}tf &J[:awQX public static void log(int sMsg) "i y { %zG;Q@ System.err.println(sMsg); F*IzQ(#HW } &"yx<&c} } t;W0"ci9 \.MR""@y`{ `[f*Zv w /* B3We|oe ! **TestMethod.java rDm~h~u5 */ b*a#<K$T_ package NetFox; yA)/Q
Yge \pPY37l X <f8,n public class TestMethod { [xSF6 B
Wk/DVue l4F%VR4KT public TestMethod() 2BQ
j { ///xx/weblogic60b2_win.exe Cn,d?H try{ z[b@V SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); aS{|uE] //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); BmbyH{4 SiteFileFetch fileFetch = new SiteFileFetch(bean); cqQ#p2<% fileFetch.start(); o_XflzC } g%sluT[# catch(Exception e){e.printStackTrace ();} C'9Cr}cZ. arIf'CG6 a=J^ } my(2;IJ#{ Ro\8ZXUQa 0(eBZdRO public static void main(String[] args) *Fy2BZH%Q { ) pzy new TestMethod(); Fq0i`~L~ } dMh:ulIY> } 3eb%OEMYk 点击下载更多相关资料
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