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/* 4A(h'(^7A **SiteFileFetch.java 2MYez>D */ ls9Y? package NetFox; 3&M0@/ import java.io.*; oPbziB8 import java.net.*; w7pX]<?R" -}oH],C ]qq2VO<b public class SiteFileFetch extends Thread { .Sa=VC?EZ 0Db=/sJ> HEa7!h[a' SiteInfoBean siteInfoBean = null; //文件信息Bean zYdieE\- long[] nStartPos; //开始位置 ,`a8@ long[] nEndPos; //结束位置 Em{;l:;(W FileSplitterFetch[] fileSplitterFetch; //子线程对象 W}zq9|p long nFileLength; //文件长度 3?_%|;ga boolean bFirst = true; //是否第一次取文件 N;!!*3a9= boolean bStop = false; //停止标志 8$iHd File tmpFile; //文件下载的临时信息 |{ZdAr.; DataOutputStream output; //输出到文件的输出流 OuWRLcJ! ScVbo3{m*T //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) j!k$SDA- public SiteFileFetch(SiteInfoBean bean) throws IOException r#w 7qEtD { Z]k@pR ! siteInfoBean = bean; $1zWQJd[- //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); !SGRK01 tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); TEj"G7]1$A if(tmpFile.exists ()) -*T0Cl. { wzoT!-_X bFirst = false; PX/^* read_nPos(); NzM ,0q } L|-|DOgw else ^4\0,> { e(b$LUV nStartPos = new long[bean.getNSplitter()]; r6aIW8 nEndPos = new long[bean.getNSplitter()]; Z:x`][vg } b~YIaD[Z OBF-U]?Y toOdL0hCe wr,+9uK } y
)<+?@sP SXJjagAoML uocFOlU0n public void run() )g3c-W= { SsfC
m C //获得文件长度 CMv8n@ry //分割文件 V;J3lV< //实例FileSplitterFetch Hm|N{ //启动FileSplitterFetch线程 P39oHW //等待子线程返回 ~P~q' try{ OmfHrlA if(bFirst) F1M:"-bda { .We{W{ nFileLength = getFileSize(); c_.Fe'E if(nFileLength == -1) psz0q| { :+
1Wmg System.err.println("File Length is not known!"); >$r o\/ } Qr6PkHU else if(nFileLength == -2) ZUz7h^3@ { Au(oKs< System.err.println("File is not access!"); wPcEvGBN= } 7xG~4N<)] else \,v+ejhw { 2<w vO 9 for(int i=0;i<nStartPos.length;i++) %AWc`D
{ mZM7 4!4X nStartPos = (long)(i*(nFileLength/nStartPos.length)); ,69547#o } Q+QD, for(int i=0;i<nEndPos.length-1;i++) @*UV|$~(Q { c"1Z,M;G nEndPos = nStartPos[i+1]; x1E;dbOZ } 0XqxW\8_l nEndPos[nEndPos.length-1] = nFileLength; gMPp'^g]_ } YZtd IG } M&Ln'BC n:1Ijh
1 H ="I=} //启动子线程 in K;n fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; X2:23j< for(int i=0;i<nStartPos.length;i++) WlGT&m&2 { d 79 2#Dc fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), O;}K7rSc siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), [U"/A1p nStartPos,nEndPos,i); JB.U& Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); uq54+zC fileSplitterFetch.start(); b8vZ^8tBV } 7~k=t!gTY // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), t&EY$'c siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); iY&I?o!Ch // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", E8p,l>6(f nEndPos = " + nFileLength); Mk+G(4p // fileSplitterFetch[nPos.length-1].start(); ?gjx7TQ? tp&|*M3 $P%cdJ T0 //等待子线程结束 ~$"2,& //int count = 0; P4/~_$e //是否结束while循环
j},i=v boolean breakWhile = false; l5KO_"hy 27$,D XD d/~g3n>| while(!bStop) u3tT=5.D { U)aftH
*Pk write_nPos(); iXvrZofE Utility.sleep(500); (vchZn# breakWhile = true; _)~VKA]"" ?~yJ7~3TS< K1]3zLnS for(int i=0;i<nStartPos.length;i++) *-Vr=e<8 { %yk_(3a if(!fileSplitterFetch.bDownOver) _ u~0t`f~ { 've[Mx breakWhile = false; 8~TKiR5 break; lNWP9?X } b>k2@ } LGX+_" if(breakWhile) !7MRHI/0C break; WBm)Q#1: ,_,*I/o>B (hQi { //count++; d~{$,"!-f //if(count>4) 1)zXv // siteStop(); =_ b/g }
j|!t3}(( d2-oy5cEB lmL$0{Yr System.err.println("文件下载结束!"); W}MN-0 } ?A*!rW:l; catch(Exception e){e.printStackTrace ();} G'(rjH>q } ',LC!^:~Nw ?#z<<FR hCd? Kti //获得文件长度 eR6vO5to public long getFileSize() lCl5#L9 { w&Gc#-B int nFileLength = -1; }N$f=:iI try{ Qf}.= ( URL url = new URL(siteInfoBean.getSSiteURL()); 8Gnf_lkI HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection ();
uKvdL
" httpConnection.setRequestProperty("User-Agent","NetFox"); X;l/D},. kLU-4W5t woBx609Aak int responseCode=httpConnection.getResponseCode(); ;DR5?N/a if(responseCode>=400) Fkq^2o
] { _nxH;Za processErrorCode(responseCode); +{I" e,Nk return -2; //-2 represent access is error zR]!g|;f } aW{5m@p{" < *;GJ{ jvL!pEC! String sHeader; %b4tyX:N0 `ZI -1&Y3 a_?b< for(int i=1;;i++) .5}Gt>4XM { |g!d[ct] //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); N2duhI6 //Utility.log(in.readLine()); V %D1Q}X sHeader=httpConnection.getHeaderFieldKey(i); 32%Fdz1S if(sHeader!=null) *h3iAcM8 { ?h%Jb^#9 if(sHeader.equals("Content-Length")) ctjQBWE { &vn2u bauS nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); $u yx break; '=#fELMW } >8=lX`9f{ } 0.w7S6v|& else 9:-7.^`P break; }f?[m&< } /sT?p=[. } ctLNzJes% catch(IOException e){e.printStackTrace ();} 2{vAs catch(Exception e){e.printStackTrace ();} [Z#Sj=z "* F`,I3 ~QxW^DGa7] Utility.log(nFileLength); [w|Klq5 _6ck@ ,$>l[G;Bm return nFileLength; LCtVM70 } '@Rk#=85Z &r4|WM/ec 3,6f}:CG //保存下载信息(文件指针位置) ::$W
.!Uv private void write_nPos() ~?HK,`0h> { m;MJ{"@A' try{ [YHtBM:y output = new DataOutputStream(new FileOutputStream(tmpFile)); (=Kv1
H aD output.writeInt(nStartPos.length); qxu3y+po] for(int i=0;i<nStartPos.length;i++) \U>&W { 3]mprX' // output.writeLong(nPos); T]-MrnO output.writeLong(fileSplitterFetch.nStartPos); [xr^t1 output.writeLong(fileSplitterFetch.nEndPos); L/C~l3 } LR>s2zu- output.close(); !U m9ceK } vIOGDI> catch(IOException e){e.printStackTrace ();} K.Y`/< catch(Exception e){e.printStackTrace ();} G:tY1'5 } P~=yTW dgoAaS2M OoH-E.lp //读取保存的下载信息(文件指针位置) W.jXO"pN private void read_nPos() .O5V;&, { Mh5>
hD try{ Q[rZ1z DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); H)7v$A,5% int nCount = input.readInt(); ID,_0b nStartPos = new long[nCount]; 9,`i[Dzp nEndPos = new long[nCount]; rVoV@,P for(int i=0;i<nStartPos.length;i++) P@vUQ { L-D4>+ nStartPos = input.readLong(); /3~L#jS nEndPos = input.readLong(); 2[qfF6FHA } WK(X/!1/k input.close(); UgS`{&b36 } -8Mb~Hfl0 catch(IOException e){e.printStackTrace ();} Ue
>]uZ| catch(Exception e){e.printStackTrace ();} rpm \!O } x0(bM g>7 2*z~'i uMZ~[Sz private void processErrorCode(int nErrorCode) <%S)6cw(3 { 3J
&Ros System.err.println("Error Code : " + nErrorCode); fPUr O } VYkh@j 89 (qU pQ:^ ziwa3 //停止文件下载 6` TwP\!$/ public void siteStop() Z}uY%] { )-Hs]D: bStop = true; "}*D,[C5e for(int i=0;i<nStartPos.length;i++) |;wc8; fileSplitterFetch.splitterStop(); gI;"P kN )c' 45bD
\\KjiT' } ^?+[yvq } P{6$".kIY //负责部分文件的抓取 jL"V0M]c **FileSplitterFetch.java '!7>*< */ `M6"=)twu package NetFox; >aO.a[AM :QGo
-,6- tSJ# import java.io.*; yT@Aj;X0v import java.net.*; h'
!C @`4T6eL5 aM;SE9/U public class FileSplitterFetch extends Thread { Y_:jc{? |di(hY| S=!WFKcJR String sURL; //File URL ?`Yu~a{ long nStartPos; //File Snippet Start Position .k]`z>uv long nEndPos; //File Snippet End Position ?I[8rzBWU int nThreadID; //Thread's ID lTMY|{9 boolean bDownOver = false; //Downing is over s"`~Xnf boolean bStop = false; //Stop identical v7
*L3Ol
FileAccessI fileAccessI = null; //File Access interface nXLz<wE j}ob7O&U'w Mu[lk=jC public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException #:gl+ { 2MRd this.sURL = sURL; OVi<d this.nStartPos = nStart; fc*>ky.v this.nEndPos = nEnd; 1 #,4P1" nThreadID = id; jL\j$'KC fileAccessI = new FileAccessI(sName,nStartPos);//定位 9,INyEyAL } E .Xp\Dm71 M0fN[!*z $kTm"I public void run() x:MwM? { s"=TM$Vb while(nStartPos < nEndPos && !bStop) SZ9Oz-? { >^jBE'' *zrGrk:l X+XDfEt:Q try{ ]|CcQ1#|H URL url = new URL(sURL); l&+O*=#Hh HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); A[+)PkR httpConnection.setRequestProperty("User-Agent","NetFox"); *HR
pbe2 String sProperty = "bytes="+nStartPos+"-"; ?K[Y"*y2 httpConnection.setRequestProperty("RANGE",sProperty); j9>[^t3U Utility.log(sProperty); Unb2D4&' z1Ieva] <!Cjq,Sk7 InputStream input = httpConnection.getInputStream(); h$'6."I //logResponseHead(httpConnection); Ra|P5 l!x+K& _HHvL= byte[] b = new byte[1024]; #kM|!U= int nRead; 6T$=(I <4 while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) ,yltt+e { AyO%,6p[ nStartPos += fileAccessI.write(b,0,nRead); f-|?He4O] //if(nThreadID == 1) KBB)xez8 // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); e^O:I } Z|n|gxe r&4Xf#QD6 +s}&'V^ Utility.log("Thread " + nThreadID + " is over!"); q!:dZES bDownOver = true; $M)i]ekm //nPos = fileAccessI.write (b,0,nRead);
U=~?ca } &6vaLx catch(Exception e){e.printStackTrace ();} [WR"#y } toPbFU' } 7?whxi Qs -4Hb]#*2 ,6{z //打印回应的头信息 MWv@]P_0p! public void logResponseHead(HttpURLConnection con) a
-Pz<* { -13}]Gls7Q for(int i=1;;i++) 9-T<gYl { >XgJo7u String header=con.getHeaderFieldKey(i); Pb'(Y if(header!=null) x;7l>uR //responseHeaders.put(header,httpConnection.getHeaderField(header)); Qf( A Utility.log(header+" : "+con.getHeaderField(header)); uM`i!7} else jlj ge=#c2 break; 66pjWS
{X } Pjs=n7 } "KP]3EyPc >; MJm Q<V(#)* public void splitterStop() 61H_o7XXk { l%EvXdZuOy bStop = true; AaYH(2m- } !ddyJJ^a Q[#}Oh6$ N4ZV+
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} ({j8|{)+ ?2&= +QaT 3Tu]-. /* GmR3
a **FileAccess.java {jO+N+Ez9 *//文件访问(定位,写) Np+PUu> package NetFox; $$m0mK import java.io.*; P5?VrZy _ARG
" >O\+ 9T@ public class FileAccessI implements Serializable{ 5=C?,1F$A !Sn|!:N4 //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 ?{ExBZNa RandomAccessFile oSavedFile; CO`)XB6W long nPos; )7*'r@ cK1^jH<| $~6MR_Yq public FileAccessI() throws IOException 6HK1? { )=Z;H"_ this("",0); s0' haU } 32 i6j 7{}E{/ 7_2D4CI public FileAccessI(String sName,long nPos) throws IOException sg7h&<Xx { CnB[ImMs(A oSavedFile = new RandomAccessFile(sName,"rw"); h}@wPP{ this.nPos = nPos; YjDQ`f/ oSavedFile.seek(nPos); ,7j8+p|}, } G~5pMyOR |2l-s 1|y -0CBMoe public synchronized int write(byte[] b,int nStart,int nLen) INr1bAe$ { teS>t!d int n = -1;
"/6#Z>y try{ $Lj]NtO oSavedFile.write(b,nStart,nLen); {C5:as n = nLen; >"2jCR$/ } i-wRwl4aEF catch(IOException e) !-}Q{<2@W { I9Ohz!RQ e.printStackTrace (); IVh5SS } /GGyM]k3 Cw(e7K7& 72Bc0Wg
return n; et+lL"& } B9NUafK= X6
BIZ sR9$=91` }
!tTv$L> .5Y{Yme z]N#.utQ /* U*a#{C7" **SiteInfoBean.java {%3WHGr%L */ "yw{A%J package NetFox;
<)TIj6 qkhre3 s8,YQ5- public class SiteInfoBean { o)5zvnu7 twr{jdY9 /^xv1F{ private String sSiteURL; //Site's URL ZFtR#r(~41 private String sFilePath; //Saved File's Path 4N,[Gs<7 private String sFileName; //Saved File's Name 8~O#@hB~3 private int nSplitter; //Count of Splited Downloading File I]eeV+U8W x >a h, {nmu(EP public SiteInfoBean() V|
Fo@ {//nSplitter的缺省值为5 c)#7T<>*' //default value of nSplitter is 5 6c]4(%8 this("","","",5); @;eH~3P } 6 EqN>. 3yRvs;nWS B7uK:J:c*H public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) ]z'L1vQl7 { :Ob4WU sSiteURL= sURL; o?}dHTk7 sFilePath = sPath; t,%m-dU sFileName = sName; %q|*}l this.nSplitter = nSpiltter; "J,|),Yd ouCh2Y/_ =Lkn
} MPUyu(-%{ enPtW q,ie)` public String getSSiteURL() *N$XQ{o { '|]}f }Go return sSiteURL; 9mHCms } /UunWZ u% &C
MBTY#u qWW\d', . public void setSSiteURL(String value) T2rwK2 { `>\
~y1 sSiteURL = value; +>C26Q } Y[L,rc/j |5(un# o+hp#e public String getSFilePath() !X7z y9 { O83J[YuzjN return sFilePath; K7C
<}y } I7Kgi3 0z \KI?kd
&5K3AL public void setSFilePath(String value) uH$hMg { !PoyM[Z"f sFilePath = value; ^
q ba<#e } iWeUsS%zpV 5)f 'wVe H%m^8yW1 public String getSFileName() X$==J St { {P?Ge return sFileName; VJ-t#q" } Po=:-Of: ,9G'1%z, xytWE:= public void setSFileName(String value) MX~h>v3_R4 { \
&|xMw[ sFileName = value; qWK} } }2LG9B% fV4eGIR& 0>j0L8#^p public int getNSplitter() pWzYC@_W
{ XC6 |<pru return nSplitter; I;jH'._k# } br88b`L H$?MPA-c W:<2" &7 public void setNSplitter(int nCount) ,+BFpN' { *8qRdI9 nSplitter = nCount; RQ|K?^k
v } Vfd_nD^8oZ } e?(4lD)d O~8jz Wp
=
]YO /* Z5rL.a& **Utility.java ^'N!k{x */ |7|'JTy package NetFox; rk=w~IZJ3 =^M Q 4 b/.EA'/ public class Utility { =Cf@!wZ^
XU"G Wx/PD=Sf& public Utility() *9KT@"v { I@N/Y{y# U{EcV%C2 l{r HXST| } g NE"z uUaDesz~= //线程睡眠 ax _v+v % public static void sleep(int nSecond) dn~k_J=p { D_F1<q try{ # .&t'"u Thread.sleep(nSecond); 9_*3xu<7i } ~]%re9jGW catch(Exception e) rr1,Ijh{D { Q.4+"JoG e.printStackTrace (); {3os9r, } $!'Vn)Z7 } G|&$/]~ %j0c|u //日志 agoMsxI9 public static void log(String sMsg) F$v ^S+Ch { cPL6(&7 System.err.println(sMsg); s Fk{Tv@Yz }
CU\r
I \SmYxdU'> T;kh+i public static void log(int sMsg) Ktuv
a3=>N { aQWg?,Ju6 System.err.println(sMsg); 5#_GuL% } V+'zuX } !Y^B{bh bneP>Bd A{{rNbCK /* Z~
q="CA4 **TestMethod.java 0n{+_
*/ H5FWk package NetFox; suX^"Io%! o9D#d\G !9C]Fs*`? public class TestMethod { Ov:U3P?% ]C_$zbmi w&^Dbme public TestMethod() U&+lw= { ///xx/weblogic60b2_win.exe FGMYpapc~ try{
#s=\ SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); d8jP@> //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); j}%C;;MPH SiteFileFetch fileFetch = new SiteFileFetch(bean); c@O7,y:`I fileFetch.start(); noWwX } Em<J{`k6 catch(Exception e){e.printStackTrace ();} z[+pN:47 8
=3#S'n dr=KoAIxy } r)w]~)8 AIQ]lQ( qy!pD
R; public static void main(String[] args) vdulrnGqL { !\Q/~p'jS new TestMethod(); V+y:!t` } uc;,JX!bN } HX:^:pF} 点击下载更多相关资料
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