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/* -wUw)gJbM **SiteFileFetch.java *7:HO{P>Y */ U1~6 o"1H package NetFox; CZ.XEMN\ import java.io.*; %MUh_63bB import java.net.*; a?5R;I B `8<h aU z3Ro*yJU public class SiteFileFetch extends Thread { fkWTO"f- v dR6y ~
$QNp#dq SiteInfoBean siteInfoBean = null; //文件信息Bean c</u]TD long[] nStartPos; //开始位置 ~LufHbr long[] nEndPos; //结束位置 %3A~& FileSplitterFetch[] fileSplitterFetch; //子线程对象 +tSfx long nFileLength; //文件长度 jg+q{ ^ boolean bFirst = true; //是否第一次取文件 xXn2M*g boolean bStop = false; //停止标志 R#w9%+ File tmpFile; //文件下载的临时信息 'H.,S_v1x DataOutputStream output; //输出到文件的输出流 ]5`Y^hS_g fx`oe //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) b am*&E%0K public SiteFileFetch(SiteInfoBean bean) throws IOException Mw9;O6 { ?> 7SZiC` siteInfoBean = bean; JMIS*njq^ //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); `-QY<STTP9 tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); dxAP7v if(tmpFile.exists ()) g?=|kp { u{dI[?@ bFirst = false; Wp0L!X=0
read_nPos(); C0.bjFT| } -|aNHZr else 'vV|un(6 { 0b~{l; nStartPos = new long[bean.getNSplitter()]; DS]C`aM9 nEndPos = new long[bean.getNSplitter()]; :L'U>)k } Q@HW`@i byB
ESyV!O Y]-7T-*+t /ig'p53jL } 5^ +QTQ oGa8#> c[RkiV3 public void run() ;S_\-
]m&g { ,OilGTQ# //获得文件长度 tH\ aHU[ //分割文件 U#{^29ik=o //实例FileSplitterFetch pcl'!8&7 //启动FileSplitterFetch线程 s)<^YASg //等待子线程返回 r|W2I,P try{ 3$Y(swc if(bFirst) yw3E$~ k { uv$t>_^ nFileLength = getFileSize(); Ebk_(Py\ if(nFileLength == -1) M^twD* { = ^OXP+o System.err.println("File Length is not known!"); :6}y gL*i } JE$aYs<(TF else if(nFileLength == -2) n fU\l< { ds9L4zfO System.err.println("File is not access!"); /18VQ } a&*fk ?o else ">V.nao { M*x1{g C/ for(int i=0;i<nStartPos.length;i++) eJv_`#R&Of { NrrnG]#p1 nStartPos = (long)(i*(nFileLength/nStartPos.length)); RV2s@<0p } ~c*$w O\ for(int i=0;i<nEndPos.length-1;i++) DL:wiQ { W@(EEMhw nEndPos = nStartPos[i+1]; 0s#`H } y>DvD) nEndPos[nEndPos.length-1] = nFileLength; lNw8eT~2 } -(Y( K!n } rnV\O L =ZaTD-%id ,( ?q //启动子线程 jZX2)# a! fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; yK #9)W- for(int i=0;i<nStartPos.length;i++) ,%zU5 hh { ",hPy[k fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), ,iQRf@#W_b siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), +U:U/c5Z^ nStartPos,nEndPos,i); +v7mw<6s Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); 9O.okU fileSplitterFetch.start(); tf5h/: } G; *jL4 // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), N5SePA\ ,? siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); #EO@<>I // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", c9 c_7g'q- nEndPos = " + nFileLength); ("7rjQjRz // fileSplitterFetch[nPos.length-1].start(); Hlr[x nX|f?5 O 0E5"}8 //等待子线程结束 _8f?
H#& //int count = 0; :=iP_*# //是否结束while循环 hPP,D\# boolean breakWhile = false; \.`;p /ehmy(zL ^4\hZ while(!bStop) ~'[0-_]=f { w4m)lQM write_nPos(); BXCB/:0 Utility.sleep(500); srh>"
2." breakWhile = true; gNsas:iGM *K<|E15 , ;_HG
5}i for(int i=0;i<nStartPos.length;i++) =Z3{6y}3p { "
aEk#W if(!fileSplitterFetch.bDownOver) 7Ntt#C;]U { 3($ cBC breakWhile = false; V?.')?'V break; 907N;r } Cm~Pn"K_] }
MYD`P2F if(breakWhile) Zt;dPYq> break; 3u)NkS= .;1tu+S j>{Dbl:#2 //count++; Hz*5ZIw //if(count>4) A*$JF>`7 // siteStop(); ~6)A/]6 } f6I$d< bp>-{Nv qPn}$1+~ System.err.println("文件下载结束!"); JZa^GW:YQh } ]~Su catch(Exception e){e.printStackTrace ();} `Mh3v@K: } p-6Y5$Y W7F1o[ '@ $L}C#OI //获得文件长度 BrHw02G public long getFileSize() Cggu#//Z}Q { u\jQe@j
' int nFileLength = -1; B#|c$s{ try{ pQ_EJX) URL url = new URL(siteInfoBean.getSSiteURL()); 9_h
V1: HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); nOH x^( httpConnection.setRequestProperty("User-Agent","NetFox"); 8(6(,WwP} m#i5}uHHg j5rB+ int responseCode=httpConnection.getResponseCode(); ho'Ihep,L if(responseCode>=400) xF#'+Y { t-;zgW5mwF processErrorCode(responseCode); +;T `uOF} return -2; //-2 represent access is error yobcAV` } D?Mj<|| Y-&SZI4H ,w9:)B7 String sHeader; nQtp 4 |g$n-t 5~pQ$- for(int i=1;;i++) @L 9C_a { +E7Os|m //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); @(m+B\ //Utility.log(in.readLine()); Az`c ?
W% sHeader=httpConnection.getHeaderFieldKey(i); KE~l#=S if(sHeader!=null) __3s3YG { yx@%x?B if(sHeader.equals("Content-Length")) uZg[PS=@!X { -->~<o nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); MXsCm( break; P<tHqN!q } j&
H4L } AgBXB%). else =hP7Hea(N break; 6w"_sK?
} k6}M7&nY } x @a3STKT catch(IOException e){e.printStackTrace ();} mr6 ~8I catch(Exception e){e.printStackTrace ();} PX} ~ >,9ah"K_x a(eKb2 CX Utility.log(nFileLength); kA"|PtrW pkKcTY1Fx <TDp8t9bU return nFileLength; OpNxd]"T } ,\Q^[e!m~ eXYf"hU, 4ZX6=-u^ //保存下载信息(文件指针位置) ,(@J Ntx private void write_nPos() DD?zbN0X { :kU-ol$ try{ rP7[{'%r output = new DataOutputStream(new FileOutputStream(tmpFile)); (*K=&e0O output.writeInt(nStartPos.length);
# h/#h\ for(int i=0;i<nStartPos.length;i++) n9w(Z=D\ { Bw{enf$vR // output.writeLong(nPos); 0DsW1 output.writeLong(fileSplitterFetch.nStartPos); "C/X#y
output.writeLong(fileSplitterFetch.nEndPos); c{,VU.5/ } l(<=JUO; output.close(); n$u@v(I } 9sI&&Jg catch(IOException e){e.printStackTrace ();} ;S5J"1)O~ catch(Exception e){e.printStackTrace ();} j`o_Stbg } 0^m`jD .*k$abb Tp[-,3L //读取保存的下载信息(文件指针位置) yW)&jZb"( private void read_nPos() y(fJ{k { Ds<~JfVl try{ GpZ}xY'|w, DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); Mjj5~by: int nCount = input.readInt(); tZL {;@ nStartPos = new long[nCount]; >3qfo2K0 nEndPos = new long[nCount]; zAkF:^#Y for(int i=0;i<nStartPos.length;i++) v[+ ] { 4/?@ % nStartPos = input.readLong(); \5pBK nEndPos = input.readLong(); lvd`_+P$ } 5kx-s6`! input.close(); ~#];&WE } /=K(5Xd catch(IOException e){e.printStackTrace ();} 4Nl3"@<$ catch(Exception e){e.printStackTrace ();} 6BdK)s } xa[)fk$6 dI?x(vw }`uFLBG3 private void processErrorCode(int nErrorCode) uefrE53 { i1 >oRT{Z
System.err.println("Error Code : " + nErrorCode); HPc~wX } Aryp!oW X8\UTHT&0 HDYWDp //停止文件下载 x+8%4]u` public void siteStop() %:!ILN { `Fx+HIng, bStop = true; E;rS"'D: for(int i=0;i<nStartPos.length;i++) Y.b?.)u& fileSplitterFetch.splitterStop(); @:Emmzucv| {l9g YA E"zC6iYZ; } ;Xl {m`E+ } U62Z ?nge% //负责部分文件的抓取 T$"sw7< **FileSplitterFetch.java `rest_vu */ hYbaVE package NetFox; 'mTQ=1 7DPxz'7): ~5>k_\G8 import java.io.*; ]NyN@9u@( import java.net.*; v|R#[vtFd ZV;~IaBL V<ii public class FileSplitterFetch extends Thread { 7nPjeh ENy$sS6[D ~~3*o String sURL; //File URL &fW'_,- long nStartPos; //File Snippet Start Position NXMZTZpB7 long nEndPos; //File Snippet End Position u&Yd+'); int nThreadID; //Thread's ID 2 b80b50 boolean bDownOver = false; //Downing is over @:}l a boolean bStop = false; //Stop identical B:VGa<lx5 FileAccessI fileAccessI = null; //File Access interface 'iU+mRLp I23"DBR3 A_Y5{6@ public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException VA@ { O4cBn{Dq9 this.sURL = sURL; `$MO;Fv,G this.nStartPos = nStart; }yaM.+8. this.nEndPos = nEnd; jdkqJ4&i nThreadID = id; Ln8r~[tVE< fileAccessI = new FileAccessI(sName,nStartPos);//定位 nG%<n } bPIo9clq >*EJ6FPO @<yY Mo7 public void run() deEc;IAo { 32Wa{LG;2 while(nStartPos < nEndPos && !bStop)
akG|ic-~ { KB{IWu IEe;ygL# q|
UO]V try{ n5y0$S/D URL url = new URL(sURL); M5P3; HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); -EE}HUP) httpConnection.setRequestProperty("User-Agent","NetFox"); I#'yy7J String sProperty = "bytes="+nStartPos+"-"; fg/hUUl httpConnection.setRequestProperty("RANGE",sProperty); !AGoI7W} Utility.log(sProperty); \hdil`{> p^w_-(p ,u9>c*Ss\ InputStream input = httpConnection.getInputStream(); eH~T PH //logResponseHead(httpConnection); >-y}t9[/ [<sN " ,BR W= byte[] b = new byte[1024]; 7=s7dYlu int nRead; fOdX2{7m while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) R5\|pC { iu$Y0.H@ nStartPos += fileAccessI.write(b,0,nRead); >vXS6`; //if(nThreadID == 1) c<sq0('` // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); 4wWfaL5" } yyGn< 2cwJ);Eg2 C}ASVywc,1 Utility.log("Thread " + nThreadID + " is over!"); k"6v& O bDownOver = true; f ~bgZ //nPos = fileAccessI.write (b,0,nRead); -j@IDd7 } !r9rTS] catch(Exception e){e.printStackTrace ();} _w2KUvG-8 } R+2~%|{d } \Y`psSf+ NErvX/qK `6BQ6)7 //打印回应的头信息 ^gkKk&~A5? public void logResponseHead(HttpURLConnection con) 2wa'WEx { DR]4Tc z# for(int i=1;;i++) ..w$p-1 { I:0dz:T7* String header=con.getHeaderFieldKey(i); *?VB/yO=0 if(header!=null) 9<
S //responseHeaders.put(header,httpConnection.getHeaderField(header)); phB d+zQc Utility.log(header+" : "+con.getHeaderField(header)); %cJdVDW`L else c[$i )\0 break; W@i|=xS? } ]:m4~0^#-( } J(A+mYr{: lTVz'ys >U?#'e{qW public void splitterStop() 0.c96& { [z6P]eC7 bStop = true; _ q
AT%. } 1#8~@CQ :: =h|7bYLy +n)bWB% } bJkFCI/ %IDl+_j a&dP@) /* ylDfr){ **FileAccess.java 7[i&EPN *//文件访问(定位,写) j&b<YPZ package NetFox; o{ccO29H/ import java.io.*; RWoVN$i> e@&2q{Gi= Hl*#iUq public class FileAccessI implements Serializable{ Zu>CR_C
bjN"H`Q //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 $$*0bRfd4= RandomAccessFile oSavedFile; \`%#SmQF long nPos; {7q8@`Oa tf1Y5P$ ?,C'\8' public FileAccessI() throws IOException ''k}3o.K[ { dEo r+5} this("",0); 5d}bl{ } ie7TO{W IxY!.d_s|~ = N:5#A public FileAccessI(String sName,long nPos) throws IOException ?ZkVk =t? { ?+$EPaC2 oSavedFile = new RandomAccessFile(sName,"rw"); $N|Spp0 this.nPos = nPos; faZc18M^1 oSavedFile.seek(nPos); Xob(4 } FY]Et=p W#wC cCIs~*D public synchronized int write(byte[] b,int nStart,int nLen) $cLZ,N24 { tMo=q7ig int n = -1; .e}`n)z try{ eO{2rV45O oSavedFile.write(b,nStart,nLen); s5X51#J#~ n = nLen; Hq,NOP } [kPl7[OL catch(IOException e) )Rj?\ZUR { Ev48|X6 e.printStackTrace (); 5rJ7CfVq } I#W J";kqB lO}I>yo}\ '47E8PIJ| return n; 8Z
0@-8vi } 7qdB CZ(fP86e 0 Gq<APtr } ,rhNXx #Q|ACNpYM NF7+Gp6?q /* kQrby\F(< **SiteInfoBean.java |lVi* 4za% */ !ed0 package NetFox; Nm3CeU xB}B1H% h6D1uM"o public class SiteInfoBean { % "ZC9uq? sT91>'& iF"kR]ZL private String sSiteURL; //Site's URL gyCXv0*z private String sFilePath; //Saved File's Path rwAycW7 private String sFileName; //Saved File's Name QVD^p;b private int nSplitter; //Count of Splited Downloading File )U{IQE;T# ~VPE9D@ hTQ]xN) public SiteInfoBean() {%X[Snv {//nSplitter的缺省值为5 r<"k
/ //default value of nSplitter is 5 >< Qp%yT this("","","",5); Lx3`.F\mG } 0|(6q=QK oCB#i~|>a g<i>252> public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) w.Go]dpK { &lB>G[t sSiteURL= sURL; EL9JM}%0v sFilePath = sPath; t;lK=m| sFileName = sName; (KT+7j0^ this.nSplitter = nSpiltter; {CGk9g"`
=#vU$~a N\zUQ
J } - 4S4I L>,xG.oG R78lV-};Q public String getSSiteURL() QQUZneIDp { 49 1 1 return sSiteURL; -M`+hVs? } oh >0}Gc8 /Fp@j/50 4pFoSs?\ public void setSSiteURL(String value) g|)yM^Vqr6 { !A"-9OS2 sSiteURL = value; 4zf( } nkz^^q`5l7 eo4v[V& 'tq4-11xB public String getSFilePath() AJt4I
W@ { Rhh.fV3 return sFilePath; '_o(I } Qx77%L4 2QV|NQSl }zHG]k,j public void setSFilePath(String value) =2, iNn { t8"yAYj
sFilePath = value; 4NmLbM&C8 } DgC;1U' 6"jV>CNc@ lhJZPnx~ public String getSFileName() :-1
i1d { Y/G~P,9 return sFileName; K=;oZYNd } ^9oJuT!tu UN`O*(k[ rFYw6&;vOi public void setSFileName(String value) hSSFmEpr { }e&Z"H | sFileName = value; R8fB
8 ) } CYN| Z=>#|pW,) 0-zIohSJdQ public int getNSplitter() el^WBC3 { N(L?F):fT return nSplitter; 2k"!o~s^ } ?-9It|R R]Pv=fn .06[*S public void setNSplitter(int nCount) %n>*jFC { >^%TY^7n nSplitter = nCount; >^
M=/+<c } <>^otb,e$ } :/FT>UCL SHP_ ~>|o3&G{ /* nn6&`$(Q~ **Utility.java [f\TnXq24 */ 8yn}|Y9Fu package NetFox; :sXn*k4v w&^_2<a2 cSs??i
D"q public class Utility { YVB\9{H? @F0+t; 7.`:Z_ public Utility() h[I~D`q)v { Dg2=;)"L )
v^;"q" q3-V_~5^/z } E]j2%}6Z% ]-G10p}Ph- //线程睡眠 V50FX}i public static void sleep(int nSecond) bClMM { ZF6?N?t}h8 try{ $d_%7 xx Thread.sleep(nSecond); T`.RP&2/d } XhEd9># catch(Exception e) ]S#m
o { /K<.$B8 e.printStackTrace (); Y]gb`z$? } E||[(l,b } aL%amL6CX pv #uLo //日志 WN%KATA public static void log(String sMsg) {(MC]]'? { szx7CP`<8 System.err.println(sMsg); ME%W,B.|"s } G 0;5I_D/ %d/Pc4gfc ApxGrCu public static void log(int sMsg) 7$&3(#!N { }+4^ZbX+: System.err.println(sMsg); PtT=HvP!k } Vx6/Rehj } Dtw1q- -1 Ok_h" bijE]:<AE7 /* {q-<1|xj/J **TestMethod.java 6*n<emP */ F qW[L>M' package NetFox; _b8?_Zq - s,M+Q(< E8=8OX/{Y public class TestMethod { ]%y3*N@AZ c{dge/2yb >5Rcj(-&l public TestMethod() cnR.J
{ ///xx/weblogic60b2_win.exe (ugB3o try{ ,c;u] SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); VdZmrq;?/ //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); 5 uU.K3G7 SiteFileFetch fileFetch = new SiteFileFetch(bean); Gw5j6
fileFetch.start(); $\
0d9^)& } m.}Yn, catch(Exception e){e.printStackTrace ();} DKG%z~R* Rt[zZv u::2c } lo%:$2*'p 8RfFP\ AP X(Wd public static void main(String[] args) >(}
I7 { MifPZQ new TestMethod(); RiY9[ec2 } x!A.** } Tjfg[Z/x 点击下载更多相关资料
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