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/* %\
i 7 **SiteFileFetch.java (1pxQ%yEA */ bnz2\C9^ package NetFox; ]S6`",+)<f import java.io.*; %U&O
\GB import java.net.*; {/C
\GxH+ 5xm^[o2#y }T?0/N3y& public class SiteFileFetch extends Thread { V #0F2GV<, pb(YA/ 3U<\s=1?X SiteInfoBean siteInfoBean = null; //文件信息Bean &;%z1b>F long[] nStartPos; //开始位置 o
26R] long[] nEndPos; //结束位置 0Jh^((i* FileSplitterFetch[] fileSplitterFetch; //子线程对象 1XAXokxj long nFileLength; //文件长度 Gyak?.@R boolean bFirst = true; //是否第一次取文件 :K ^T@F5n boolean bStop = false; //停止标志 9U_uw
Rv2 File tmpFile; //文件下载的临时信息 t?:} bw+m DataOutputStream output; //输出到文件的输出流 H+`s#'(i_P 3TRzDE(J //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) zqDIwfW public SiteFileFetch(SiteInfoBean bean) throws IOException gNdEPaaFI { 2FxrMCC siteInfoBean = bean; UJXRL
//tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); p9;Oe,Il tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); }dl[~iKW if(tmpFile.exists ()) |D %m>M6 { +0016UgS# bFirst = false; NW'rqgG read_nPos(); Q2c|sK8
} W)dQyZ>J else (5s$vcK { ieN}Ajl2 nStartPos = new long[bean.getNSplitter()]; 8IY n9<L nEndPos = new long[bean.getNSplitter()]; Q`"gKBN1 } QkXnXu 9Ij=~p]p %T hY6y( ]xlV;m } i NX%Zk[ h01 HX Fb&Xy{kt1 public void run() e`pYO]Z { Ak`7 f$z //获得文件长度 :Yi1# //分割文件 @ 5!Mr5; //实例FileSplitterFetch y9cDPwi:b //启动FileSplitterFetch线程 }fps~R //等待子线程返回 CbmT aEaP try{ /DG+8u if(bFirst) ?v4-<ewD { ~s@PP'! nFileLength = getFileSize(); -a`` if(nFileLength == -1) eSNwAExm { }Ut*Y* System.err.println("File Length is not known!"); Lo^0VD!O } |H`}w2U[j else if(nFileLength == -2) !}Sf?nP# { '->%b System.err.println("File is not access!"); |,*N>e } :+%"kgJNL else 4K_rL{s0U { DJxe3< for(int i=0;i<nStartPos.length;i++) Zj@k3y { Arg604V3 nStartPos = (long)(i*(nFileLength/nStartPos.length)); ~)\9f 1O{^ } zn| S3c for(int i=0;i<nEndPos.length-1;i++) gnjh=anVX1 { b&AGVWhh nEndPos = nStartPos[i+1]; `mar-r_m } <L4.* nEndPos[nEndPos.length-1] = nFileLength; ^I =W< } ;D}8acQ } {MP8B'r-6 lSGtbSyDI toDv~v //启动子线程 3uSj5+@q6 fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; td*1 for(int i=0;i<nStartPos.length;i++) i3bH^WwE&k { ?b?6/_W~R fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), ,/?7sHK-0 siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), Y>Oh]? nStartPos,nEndPos,i); nQe^Bn Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); ET t7?,x@ fileSplitterFetch.start(); G(g`>' m } |m x)W} // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), 97/"5i9 siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); =:)p\{B // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", [BPK0 nEndPos = " + nFileLength); ,8~qnLy9 // fileSplitterFetch[nPos.length-1].start(); 'Z(KE2&? ?T]` X
6n[O8^ //等待子线程结束 EW$.,%b1 //int count = 0; ,"MRA //是否结束while循环 |;~kHc$W boolean breakWhile = false; <SK%W= (OA-Mgyc W6~aL\[ while(!bStop) ['<Q402:. { 5<Ly^Na: write_nPos(); W9i}w& Utility.sleep(500); %2H0JXKa, breakWhile = true; ?8ZOiY( #b u]@/ <OX_6d *@ for(int i=0;i<nStartPos.length;i++) ( (.b& { OvL@@SX | if(!fileSplitterFetch.bDownOver) 9T`$gAI { 9%+Nzo(Fd
breakWhile = false; D<V[:~-o break; Y^ Of } ~3f`= r3/. }
fP+RuZ if(breakWhile) 4b\R@Knu break; d@sAB1: JQi+y; UweXz.x7 //count++; QCm93YZs6E //if(count>4) "!- // siteStop(); |hx"yy'ux } NOC8h\s}( {RG4 m{#9 v'0WE System.err.println("文件下载结束!"); 9' $\GN{0 } 0m3:!#\
catch(Exception e){e.printStackTrace ();} mP!=&u fcU } kGz0`8URu Ox | ? O4)'78ATp //获得文件长度 }u3Q*oAGl public long getFileSize() ; 9n} P@ { %4bGI/\/ int nFileLength = -1; z%FBHj try{ S*aVcyDEP URL url = new URL(siteInfoBean.getSSiteURL()); 6_G[& HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); yj:<3_-C* httpConnection.setRequestProperty("User-Agent","NetFox"); /$z(BX/ /nPNHO>U xbVvK+ int responseCode=httpConnection.getResponseCode(); 8fI]QW if(responseCode>=400) nj90`O.K { Z.^DJ9E<1 processErrorCode(responseCode); ";kwh8wB return -2; //-2 represent access is error g6 AEMer } PZ#\O 3]46qk' ^ gy"$F3{` String sHeader; be<7Vy]j hFW{qWP J!\Cs1!f for(int i=1;;i++) g-C)y
06 { f9%M:cl //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); !t;B.[U * //Utility.log(in.readLine()); #<$pl]>}t sHeader=httpConnection.getHeaderFieldKey(i); +.czj,Sq if(sHeader!=null) /8cfdP Ba { GbXa=*
<-< if(sHeader.equals("Content-Length")) l:@`.'-= { 0:1[F!]'b nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); S17iYjy#8T break; E;o
"^[we } K/flg|uZ/V } -XJXl}M. else q PveG1+25 break;
Qhc>,v) } Ii.0Bul } OMY^'g%w catch(IOException e){e.printStackTrace ();} T)Uhp catch(Exception e){e.printStackTrace ();} ,(;T V_@$ r(ZMZ^ cv=H6j]h| Utility.log(nFileLength); Ii.?|
u vkj Hh. (kY wD return nFileLength; J<9;Ix8R } ov
'g'1} >h
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+|w%}/N //保存下载信息(文件指针位置) Fkvf[!Ci private void write_nPos() ^~7/hm: { l-gNJ=l+K try{ BJDSk#!J!{ output = new DataOutputStream(new FileOutputStream(tmpFile)); 7l+:gD output.writeInt(nStartPos.length); +Oafo|% for(int i=0;i<nStartPos.length;i++) d71|(`& { `Eg~;E: // output.writeLong(nPos); .T\jEH8E output.writeLong(fileSplitterFetch.nStartPos); ,hVDGif output.writeLong(fileSplitterFetch.nEndPos); v =]!Po&Q- } /8O;Q~a output.close(); UhX)?'J } ]aZ3_<b catch(IOException e){e.printStackTrace ();} %wQE
lkB catch(Exception e){e.printStackTrace ();} qS!U1R?s } fG,)`[eD!_ m\.(- 2:jWO_V@ //读取保存的下载信息(文件指针位置) 6JB*brO private void read_nPos() E4cPCQyeH { lzbAx try{ bSkr:|A7 DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); ])9|j int nCount = input.readInt(); VprrklZ nStartPos = new long[nCount]; ]r(&hqdR nEndPos = new long[nCount]; 0s72BcP for(int i=0;i<nStartPos.length;i++) WNK)IC~c { th^&wp nStartPos = input.readLong(); GlOSCJZ nEndPos = input.readLong(); KBg5_+l } QFg{.F?3q> input.close(); ~7$jW[i } 4>NmJrh catch(IOException e){e.printStackTrace ();} oXgi#(y catch(Exception e){e.printStackTrace ();} ([ODmZHv } h|{DIG3 CeINODcT .jv#<"DW private void processErrorCode(int nErrorCode) ?3yrX_Qm{ { vo"?a~kY7 System.err.println("Error Code : " + nErrorCode); )qeed-{ } WzqYBa oU/{<gs w{"ro~9o //停止文件下载 18WJ*q7: public void siteStop() ]
L6LB\ { nc9sfH3 bStop = true; ~N]pB]/][ for(int i=0;i<nStartPos.length;i++) gkFw=Cd fileSplitterFetch.splitterStop(); 3y}8|ML E#VF7 9L =5q_aK#i } W690N&Wz } v
8B4%1NE //负责部分文件的抓取 -+z8bZ **FileSplitterFetch.java zF@/8# */ uhvn1" package NetFox; o#QS: '| !-~sxa280r 2rWPqG4e import java.io.*; D$fWeG{f import java.net.*; #By~gcN :zQNnq:| dfMi]rs!< public class FileSplitterFetch extends Thread { Lk]W? 6FFM-9*|[ %fIYWu`X String sURL; //File URL ` 1vDp. long nStartPos; //File Snippet Start Position BV)) #D9 long nEndPos; //File Snippet End Position vEc<|t int nThreadID; //Thread's ID c+ukVn`r boolean bDownOver = false; //Downing is over Y(;u)uN_ boolean bStop = false; //Stop identical ^ pNA_s!S FileAccessI fileAccessI = null; //File Access interface Ov@vNj& j_0xE;g"] yqKSaPRA public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException ziXI$B4- { 6 2LLfD this.sURL = sURL; Vtv1{/@+c this.nStartPos = nStart; OjurfVw this.nEndPos = nEnd; jk{m8YP)E nThreadID = id; `4-m$ab fileAccessI = new FileAccessI(sName,nStartPos);//定位 .\7AJB\l } ~BC~^D&WD $ qTv2)W1{ ,*Z/3at}5M public void run() d Z}|G-: { nk"nSXm3SR while(nStartPos < nEndPos && !bStop) 'kHa_ { Q#lFt,.y Huc|HL#C |w.h97fj try{ l}~9xa}:D| URL url = new URL(sURL); 42=/$V HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); SedVp cb+ httpConnection.setRequestProperty("User-Agent","NetFox"); +R',$YzD String sProperty = "bytes="+nStartPos+"-"; v9 8s78 httpConnection.setRequestProperty("RANGE",sProperty); F./P,hhN9 Utility.log(sProperty); "h:#'y$V hu5o{8[ ~_|CXPiQ8 InputStream input = httpConnection.getInputStream(); `k-|G2 //logResponseHead(httpConnection); a,eEP43dn h|.{dv vlo!D9zsV3 byte[] b = new byte[1024]; [sl"\3) int nRead; ^+}~"nvD while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) 6o]j@o8V { _xGC0f ( nStartPos += fileAccessI.write(b,0,nRead); +J3Y}A4W3X //if(nThreadID == 1) J~}i}|YC> // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); ]\F}-I[ } #c(BBTuX B:6VD /qC 0,wmEV!) Utility.log("Thread " + nThreadID + " is over!"); XnB-1{a1 bDownOver = true; %FJB9?9=| //nPos = fileAccessI.write (b,0,nRead); #:=*n(GT } ok{
F=z catch(Exception e){e.printStackTrace ();} ?~X^YxWsY } f@ .s(i=z } =D
Tbz3< &%4A3.qE gT2k}5d}p //打印回应的头信息 .$ xTX' public void logResponseHead(HttpURLConnection con) A5~OHmeK { nTHCb>,vM for(int i=1;;i++) LZ8xh { YJ>P+e\o9 String header=con.getHeaderFieldKey(i); yJ?=HH? if(header!=null) "\qm +g //responseHeaders.put(header,httpConnection.getHeaderField(header)); ^TT_BAI Utility.log(header+" : "+con.getHeaderField(header)); FO)`&s"&2 else wu3p2#-Z break; wRJ`RKJ-T } 9'A^n~JHF } [_HOD^ w
sbzGW~= toel!+ public void splitterStop() 8@]vvZ2/gj { XhmUtbs bStop = true; vP^V3 } R(IYb%L 9-EdT4=r, V1\Rj0#G } s'$3bLcb k< '
BY|7j~ /* Tua#~.3}J **FileAccess.java }Io5&ww:U *//文件访问(定位,写) eV\VR
!!i package NetFox; mA4]c
import java.io.*; Q1P=A:*]9 l8+;)2p! tHFBLM public class FileAccessI implements Serializable{ !JbWxGN`jn -_irkpdC[ //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 qP72JxT RandomAccessFile oSavedFile; x<=R?4@rq long nPos; g5t`YcL .}n\c%& |9]_<X[ic public FileAccessI() throws IOException 9lB$i2G>Zw { ;]_h")4"c this("",0); U4h5K}j4 } %(>,eee_ z)%]#QO pQk@
+r public FileAccessI(String sName,long nPos) throws IOException {GG;/Ns{f- { ]\*_} oSavedFile = new RandomAccessFile(sName,"rw"); VJgYXPE
` this.nPos = nPos; Nq#B4Zx oSavedFile.seek(nPos); {tUxRX } ?cB26Zrcb {=9"WN (1Klj+"p% public synchronized int write(byte[] b,int nStart,int nLen) dg4q+ { FBS]U$1 int n = -1; 9/dADJe0b try{ e,T^8_> oSavedFile.write(b,nStart,nLen); Uwg*kJ3H n = nLen; &[kFl\ } %wN*Hu~E catch(IOException e) 5-POYug { C'a#.LM e.printStackTrace (); lbMok/a2o } iIc/%<
; $8>II0C. wS+j^
;" return n; -(9TM*)O } :Q"p!,X=- !wH'dsriD HrHtA] } b&*N JwdvY] LQJC ]*b1 /* n= FOB0= **SiteInfoBean.java .Xk#Cwm' */ a$$aM2.2 package NetFox; Dmr3r[ '?d5L+9 H Yw7* public class SiteInfoBean { t_id/ d?N[bA
MC%!>,tC private String sSiteURL; //Site's URL *`V r P private String sFilePath; //Saved File's Path R[}fr36>/ private String sFileName; //Saved File's Name !%/(a)B$^$ private int nSplitter; //Count of Splited Downloading File mLDuizWI ozW\` OXF/4Oe public SiteInfoBean() =J'&.@Dwz {//nSplitter的缺省值为5 ^>#@qMw //default value of nSplitter is 5
xPz Bbe this("","","",5); 9EWw } @P<aTRy,f dlBr2 9 K k|mV&3J public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) A5RM&y { o>A']+`Eu sSiteURL= sURL; t4+bRmS`_ sFilePath = sPath; nf,Ez sFileName = sName; ;Hn>Ew this.nSplitter = nSpiltter; [midNC +, v;d3uunqv d^I:{Ii' } c=33O,_ a|Wrc)UR ^tI4 FQ>Y public String getSSiteURL() x]vyt}oCmk { Q$A;Fk}- return sSiteURL; .7> g8 } k\A4sj jfpbD
/ =1zRm >m public void setSSiteURL(String value) lfqsoIn; {
/~pB_l sSiteURL = value; p%IVWeZnx } 9b)'vr*Hy7 fk\hrVP {VKP&{~O public String getSFilePath() ksF4m_E>YB { rAS2qt return sFilePath; Vn?|\3KY } cQ(,M .cB>ab& S%o6cl = public void setSFilePath(String value)
scZ&}Ni { <%S[6*6U sFilePath = value; fK+[r1^ } rS_pv=0S CmdPa!4) ';I(#J6 public String getSFileName() [uFv_G{H { 'W/AYF^5 return sFileName; + {WZpP},v } R_b)2FU1y ZV$!dHW/ tD> qHR public void setSFileName(String value) 6o~g3{Ow { %9_jF" sFileName = value; L\\'n ) } fnK H< L6J.^tpO 9eEA80i7 public int getNSplitter() ET\rd5Po { jV(b?r)eT{ return nSplitter; D{M&>. } (VBO1 f a#m T@l\ '-_tF3x public void setNSplitter(int nCount) DiSU\?N2' { |j}%"wOh nSplitter = nCount; pPJE.[)V/ } a<P?4tbF } RU\MT'E>( ?J6\?ct4 Qk].^'\ /* rDC=rG **Utility.java >g2Z t;*@w */ Q'0:k{G
package NetFox; oPrK{flm LT]YYn($ IQ5'4zQg= public class Utility { _A6e|(.ll GW0e=Y=LR K'b #}N\ public Utility() QaSRD/,M { bH.f4-.u>) fn Pej?f: 5wbR}`8 } q=;U(,Y #fq&yjl#A //线程睡眠 6d;RtCENo public static void sleep(int nSecond) '@WS7`@-y { Je=k.pO1 try{ <UbLds{+Uo Thread.sleep(nSecond); \6vr)1~N> } -8z@FLUK- catch(Exception e) W.?EjEx { pW-aX)\DR e.printStackTrace (); BP8jReX^ } 3Cg0^~?6- } _o{w<b& rM)#}eZK! //日志 1j+RXb\< public static void log(String sMsg) 6<{SbE|G{ { 4td9=dNA+l System.err.println(sMsg); ~U1M-<IX } i(0%cNP7 7a4h7/ sg4TX?I public static void log(int sMsg) $8fJ DN { ~-#8j3 J; System.err.println(sMsg); BZk0B? } 8Wx7%@^O } !%>(O@~"| %!OA/7XbG $q0i=l&$& /*
P5`BrY,hZ **TestMethod.java b.QL\$a
& */ kw5`KfG9 package NetFox; 7xCm"jgP O{wt0 \P 'h `)6{ public class TestMethod { H+ 7Fw'u YeVkX{y >?r8D48` public TestMethod() $uYfy< { ///xx/weblogic60b2_win.exe 0[7tJbN try{ !^qpV7./l SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); HA3d9` //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); ~jMfm~ SiteFileFetch fileFetch = new SiteFileFetch(bean); ^) 5*?8# fileFetch.start(); dd!Q[]$ } } C$^WW}S catch(Exception e){e.printStackTrace ();} AO]1`b: KWH:tFL. 8P*wt'Q$ } TH? wXd\ C*Wyw]:r AQgm]ex< public static void main(String[] args) t`'5| { mZ#h p}\. new TestMethod(); !.[H!-V. } _PGS"O?j } ]I(<hDuRp 点击下载更多相关资料
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