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/* q(H ip<6p **SiteFileFetch.java _w>uI57U */ i $C-)d] package NetFox; lI6W$V\, import java.io.*; &n>7Ir import java.net.*; L=]p_2+ xzr<k Sp t"|DWC* public class SiteFileFetch extends Thread { [1SMg$@< |cgui oQ\&}@(V SiteInfoBean siteInfoBean = null; //文件信息Bean G>K@AW# long[] nStartPos; //开始位置 )c+k_;t'+ long[] nEndPos; //结束位置 DW>ES/B8$( FileSplitterFetch[] fileSplitterFetch; //子线程对象 Z7z]2v3}c long nFileLength; //文件长度 8I.VJ3Q
boolean bFirst = true; //是否第一次取文件 JYJU&u boolean bStop = false; //停止标志 wXbsS)#/ File tmpFile; //文件下载的临时信息 ugLlI2 nJ DataOutputStream output; //输出到文件的输出流 Xb,T{.3@
)M:)y //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) "}zt`3 public SiteFileFetch(SiteInfoBean bean) throws IOException
q=4Bny0 { Q|c|2byb siteInfoBean = bean; i%F<AY\O) //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); ?:uNN tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); VD[pZ2;4 if(tmpFile.exists ()) "VTF}#Uo {
z)w-N bFirst = false; :G=FiC read_nPos(); y'
[LNp V } cU8x Upq else ||Y<f * { ~=cmM nStartPos = new long[bean.getNSplitter()]; z_&P?+"Df nEndPos = new long[bean.getNSplitter()]; S-c ^eLzQ } }`_(<H j_GBH8` >;9NtoE #]Y*0Wzpfn } T$P-<s /pykW_`/- y
vI<4F public void run() "@yyXS
r { "HK/u(z) //获得文件长度 J'Sm0 //分割文件 D(\$i.,b2 //实例FileSplitterFetch Bm /YgQi //启动FileSplitterFetch线程 _ck[&Q //等待子线程返回 xaW{I7FfG try{ JN(-.8< if(bFirst) uMd. j$$ { >2lwWXA nFileLength = getFileSize(); pj8azFZ if(nFileLength == -1) e;( { VaR/o# System.err.println("File Length is not known!"); U>Gg0`> } b1-&v|L else if(nFileLength == -2) Bp_wnd { ?obm7< System.err.println("File is not access!"); (MLhaux- } +@:L|uFU else ,;jGJr { m3 -9b" for(int i=0;i<nStartPos.length;i++) f^b K=# { ^sClz*%? nStartPos = (long)(i*(nFileLength/nStartPos.length)); N$#\Xdo } iqPBsIW for(int i=0;i<nEndPos.length-1;i++) QJBr6
{ MbA\pG'T nEndPos = nStartPos[i+1]; 4 b,N8 } {x@|VuL=
nEndPos[nEndPos.length-1] = nFileLength; "rNL
`P7 } SSA W52xC } C5X(U: /nQ`&q q.V-LXM //启动子线程 {y-^~Q"z fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; rRb+_]Lg for(int i=0;i<nStartPos.length;i++) eUBrzoCO { ~ ?^/u8 fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), Yj3I5RG siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), XKU=oI0\j nStartPos,nEndPos,i); <<zI\+V Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); )^x K fileSplitterFetch.start(); vhgLcrn } |yY`s6Uq // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), NNkP\oh\ siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); uY#TEjGh] // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", "![L#)"s nEndPos = " + nFileLength); qJv[MBjk3B // fileSplitterFetch[nPos.length-1].start(); E>uVofhml {/8Q)2*>0 QP(BZJC //等待子线程结束 (z7+|JE. //int count = 0; `/IKdO*!S //是否结束while循环 B[o`k]] boolean breakWhile = false; kOrl\_!z3 !0}\&<8/m WO*9+\[v while(!bStop) LKF/u` 0dP { ^J/)6/TMXm write_nPos(); zI;0& Utility.sleep(500); WF2-$`x breakWhile = true; 4P8*k[. Jjm|9|C, K[?Xm"4 for(int i=0;i<nStartPos.length;i++) n1v5Q2xw { g@ith&*=h if(!fileSplitterFetch.bDownOver) [(mlv42" { 3iX?~ breakWhile = false; sRhKlUJG break; *_-'/i } j`>^1Q } g P}+wbk if(breakWhile) x3G :(YfO break; L^`}J7r CNrIIsJ \XzM^K3 //count++; ~$,qgf //if(count>4) 0 p uY"[c // siteStop(); j? i#L}.I } S?0$? w? l.=p8-/$'7 K\?]$dK5 System.err.println("文件下载结束!"); uaPx" } ^TdZ*($5 catch(Exception e){e.printStackTrace ();} ~N0sJ% } V!/:53 z8_XX$Mnt KOSM]c\H //获得文件长度 YK#fa2ng public long getFileSize() Dl\` { b1?xeG# int nFileLength = -1; =d`5f@'rl try{ *f+: <=i URL url = new URL(siteInfoBean.getSSiteURL()); hGTV;eU HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); Xl-e ! httpConnection.setRequestProperty("User-Agent","NetFox"); :l\V'=%9'@ :l u5Uu~ O6s.<`\ int responseCode=httpConnection.getResponseCode(); iJh!KEy~A5 if(responseCode>=400) Sm{>rR { 5TKJWO. processErrorCode(responseCode); Gu0 ,)jy\ return -2; //-2 represent access is error ^"8wUsP } IVxWxM*N< #s5N[uK^m 5g5'@vMN String sHeader; <yUstz,Xu^ Q /x8 #X >]D4Q<TY for(int i=1;;i++) fPa9ofU/kr { ()T[$.( //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); K95;rd //Utility.log(in.readLine()); BRRj$)u sHeader=httpConnection.getHeaderFieldKey(i); R!\EKH if(sHeader!=null) {Tp2H_EG { 2\D8.nQr if(sHeader.equals("Content-Length")) ?uL eFD { f:JlZ& nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); Zo-$z8 break; '-$XX%TOAc } %q3$|> } .x83Ah` else a6xj\w break; k"UO c= } jdA
]2] } YNdrWBf) catch(IOException e){e.printStackTrace ();} /7c~nBU catch(Exception e){e.printStackTrace ();} g2cVZ!GIj (t^n'V PyC0Q\$% Utility.log(nFileLength); X@N$Z{ jyS=!ydn+ >TL^>D return nFileLength; hS [SRa'. } alMYk Z3KO90O!8 w&h2y4 //保存下载信息(文件指针位置) :;;E<74e
i private void write_nPos() =JLh?Wx { -;(Q1)& try{ !v|ISyK output = new DataOutputStream(new FileOutputStream(tmpFile)); {BBw$m, o output.writeInt(nStartPos.length); W[bmzvJ_X for(int i=0;i<nStartPos.length;i++) <Q< AwP { % ~]xuP[ // output.writeLong(nPos); +ZsX*/TOn output.writeLong(fileSplitterFetch.nStartPos); -XK0KYhgW output.writeLong(fileSplitterFetch.nEndPos); 's?Ai2=# } I_)*)d44_ output.close(); B1
0+*p( } "bQ[CD catch(IOException e){e.printStackTrace ();} | $^;wP catch(Exception e){e.printStackTrace ();} le)DgIT>= } 9-1#( Y6S CJknJn3m& IakKi4( //读取保存的下载信息(文件指针位置) MhEw
_{? private void read_nPos() 8ovM\9qT { \YJy#2K try{ NW9n DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); Ds8
EMtS int nCount = input.readInt(); OKOu`Hz@ nStartPos = new long[nCount]; imL_lw^? nEndPos = new long[nCount]; mg:!4O$K for(int i=0;i<nStartPos.length;i++) 5~
' Ie<Y_ { :\~+#/=: nStartPos = input.readLong(); ~ A Qp| nEndPos = input.readLong(); 9%)=`W } J'mDU input.close(); ]uL+&(cr } L#[]I, catch(IOException e){e.printStackTrace ();} Vn=qV3OE] catch(Exception e){e.printStackTrace ();} dj6*6qX0'^ } R\Z:n* &F$:Q:* * 1t[j"CG(o private void processErrorCode(int nErrorCode) ~`#-d ^s: { ;!@EixN-YH System.err.println("Error Code : " + nErrorCode); FE7)E.U } hv$yV%.` 8euZTfK9e h #Z4pN8T3 //停止文件下载 Br>Fpe$q4 public void siteStop() >cmE
t { #1-xw~_ bStop = true; DrW#v-d for(int i=0;i<nStartPos.length;i++) *v%rMU7, fileSplitterFetch.splitterStop(); .4.pJbOg _1Z=q.sC bEuaOBc } X*oMFQgP } <msxHw //负责部分文件的抓取 RH;:9_*F **FileSplitterFetch.java ?|;yVew */ _cDF{E+; package NetFox; AF\T\mtvRm M<?Q4a'Q "R
#k~R import java.io.*; }_.:+H!@ import java.net.*; =wu*D5 )4Q?aMm gW(gJ;
L,% public class FileSplitterFetch extends Thread { jZfx Jm U4?(A@z9^ Q'apG)0I String sURL; //File URL 9|'B9C long nStartPos; //File Snippet Start Position Y o0FUj long nEndPos; //File Snippet End Position (3vHY`9 int nThreadID; //Thread's ID -#`c5y}P boolean bDownOver = false; //Downing is over 92W&x' boolean bStop = false; //Stop identical Tm]nEl)_ FileAccessI fileAccessI = null; //File Access interface F-Z%6O,2 a.F Al@Br $e%2t^ i.g public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException %6j)=IOts { TrVWv this.sURL = sURL; $*[{J+t_ this.nStartPos = nStart;
dBCbL.! this.nEndPos = nEnd; |BMV.Zi nThreadID = id; @# P0M--X fileAccessI = new FileAccessI(sName,nStartPos);//定位 vP!GJX&n5 } iSK+GQ~ D.!~dyI.,$ :
DG)g3# public void run() H( -Y { >/f_F6ay# while(nStartPos < nEndPos && !bStop) PrF}a<:n: { D?jk$^p~m# s)A<=)w/e %u{W7 try{ kW3E =pr URL url = new URL(sURL); igf)Hb;5 HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); Ha>*?`?yI httpConnection.setRequestProperty("User-Agent","NetFox"); gv15t'y9 String sProperty = "bytes="+nStartPos+"-"; UK#&lim httpConnection.setRequestProperty("RANGE",sProperty); 1xyU Utility.log(sProperty); W3W'oo }`VDD?M JF9yVE - InputStream input = httpConnection.getInputStream(); \ b8sG"G //logResponseHead(httpConnection); !#ri5{od =Yo1v=wxN eS/B24;* byte[] b = new byte[1024]; {X]R-1> int nRead; 9V uq,dv while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) pC,o2~%{ { 2U
kK0ls nStartPos += fileAccessI.write(b,0,nRead); rf+:=|/_3 //if(nThreadID == 1) RNVbcd // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); &>WWzikB* } "e3["' "tit\a6\( \h<BDk* Utility.log("Thread " + nThreadID + " is over!"); x LBQ bDownOver = true; 6Sj6i^" //nPos = fileAccessI.write (b,0,nRead); ',7??Q7j&v } ?VU(Pq*` catch(Exception e){e.printStackTrace ();} oj,lz? } FX<b:# } }!#gu3 W" "*ASi <3PL@orO //打印回应的头信息 u),Qa=Wp public void logResponseHead(HttpURLConnection con) TjK{9A { YKZrEP4^ for(int i=1;;i++) 7)rWw<mY { WnFG{S{s String header=con.getHeaderFieldKey(i); NIr@R7MKd if(header!=null) k`HP"H //responseHeaders.put(header,httpConnection.getHeaderField(header)); bSwWszd~ Utility.log(header+" : "+con.getHeaderField(header)); ({0)@+V8 else v<\A% break; " }gVAAvc7 } q}uHFp/J } W_O)~u8 a\uie$"cr] /T^ JS public void splitterStop() F,Xo|jjj { Hk_y/97OO bStop = true; v}G]X Z8 } z7.|fE)<6 _?7#MWe& C9n}6Er=, } 5pNY)>]t= @(``:)Z<b 3XiO@jzre /* =!Vf **FileAccess.java "yziXT@V *//文件访问(定位,写) d&cU* package NetFox; SQsSa1 import java.io.*; %,@vWmn ?zJpD8e /5AW?2) public class FileAccessI implements Serializable{ 4W4kwU6D q"KnLA( //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 T@wcHg RandomAccessFile oSavedFile; :Br5a34q long nPos; P=L$;xgp |6:=}dE#[ $$i.O} public FileAccessI() throws IOException .o%^'m"=D[ { )o1eWL} this("",0); j83? m } {eJt,[Y * X C86-b)E 5\mTr)\R public FileAccessI(String sName,long nPos) throws IOException eC
DIwB28 { +`mGK:> oSavedFile = new RandomAccessFile(sName,"rw"); ymY1o$qWB} this.nPos = nPos; 5OIc(YhYf oSavedFile.seek(nPos); K)7zKEp`cj } MOn,Db$ A% Q!^d (9\;A*CZ public synchronized int write(byte[] b,int nStart,int nLen) {P9J8@D { e/_C int n = -1; w"m+~).U try{ 14eW4~Mr oSavedFile.write(b,nStart,nLen); {>3\N0e5 n = nLen; |s7`F% } )'4P.>!!aQ catch(IOException e) rsn.4P= { (w( e.printStackTrace (); RhI;;Y#@ } psh^MX)Q yZ]:y-1 RT/o$$ return n; ,:Jus } %\O#&=$E tary6K9K+ ,y`CRlr: } =d
2 r6%v m .IU ;cR #$~ba%t9% /* r'LVa6e"N **SiteInfoBean.java '[|+aJ */ zr v] package NetFox; x} /,yaWZ ql{(Lf$ Jo(`zuLJ public class SiteInfoBean { 0X8t>#uF Eh</? Qv\ s>_V
private String sSiteURL; //Site's URL Xm2\0=v5; private String sFilePath; //Saved File's Path 8VG!TpX/B private String sFileName; //Saved File's Name -W{DxN1 private int nSplitter; //Count of Splited Downloading File &K_)#v`| Tl]e%A`| $yDWu"R8 public SiteInfoBean() nL@KX> {//nSplitter的缺省值为5 M4LP$N //default value of nSplitter is 5 :,;K>l^U this("","","",5); l:;PXy6) } 'k;4 j|< B0$:b! _CBWb public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) `=+^|Y} { ]=rht9)," sSiteURL= sURL; s..lK
"b sFilePath = sPath; c@[:V sFileName = sName; WtQ8X|\` this.nSplitter = nSpiltter; 4EI7W,y %R#L .xzEAu ; } {u{@jp @}_WE,r |@?%Ct public String getSSiteURL() :a8 YV!X {
OV2-8ERS return sSiteURL; _LP/!D } N- e$^pST wHZW ` @Q&3L~K" public void setSSiteURL(String value) I
+5)Jau^S { )M=ioE8`h sSiteURL = value; I&?Qq k } |yyO q %+ 7p lM 7g=2Z[o public String getSFilePath() k$5 s{q { f:*vr['d return sFilePath; G)#$]diNuX } 1"8yLvtn :(dHY a8u9aEB public void setSFilePath(String value) J]W5[)L { <9ig?{' sFilePath = value; CO-_ea U( } GWsE; rqv))Zo` {l_{T4xToB public String getSFileName() NW~z&8L { c,so`I3rI return sFileName; u$%t)2+$4 } ~pa!w?/bQ IJTtqo A,su;Qh public void setSFileName(String value) YDC mI@ { #QCphhG sFileName = value; 64Lx-avf } R [H+qr Yw _+`,W 0![
+Q4" public int getNSplitter() a{!QOX%K { pZ`|iLNl- return nSplitter; jF`BjxrG } h%WE=\,Qp VxP&j0M> %0#1t 5g public void setNSplitter(int nCount) A5,t+8`aci { *5tO0_L nSplitter = nCount; \txbhWN } %h1N3\y9i( } yx V:!gl
IUR<.Y` t+oJV+@ /* &`b
"a! **Utility.java =4GSg1Biy */ '
|-JWH package NetFox; 'mI'dG |AZg*T3:W yA{W public class Utility { R+gz<H.Q f3`7tA 2Q;9G6p public Utility() V"cKJ;s { XdH\OJ Q{e\}wN :Xc@3gF } O1')nYF7 zy*/T>{# //线程睡眠 -}K<ni6 public static void sleep(int nSecond) 9&<x17' { B|o2K}%f try{ BL@:!t Thread.sleep(nSecond); T843": } F~ Lx|)0M catch(Exception e) (EPsTox { fs/*V~@ e.printStackTrace (); j}b\Z9)! } QMv@:Eo } lRh9j l Uye|9/w8 ! //日志 W0I#\b18 public static void log(String sMsg) z;@*r}H { 9Fn\FYUq System.err.println(sMsg); !8`3GX:B_ } SkU9ON 0M\D[mg j,]Y$B public static void log(int sMsg) ){jla,[ { 8Lw B
B System.err.println(sMsg); m N8pg4 } F R|&^j6 } ~
T>U Fl(T\-Eu Ty88}V /* D7_*k%;@ **TestMethod.java 8,dBl!G= */ O12eH package NetFox; g+X}c/". k4 F"'N Cu6%h>@K$ public class TestMethod { $1SUU F\. TX SwZA6R& public TestMethod() @JdZ5Q { ///xx/weblogic60b2_win.exe Haqm^Ky$ try{ >:lnt /N3 SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); hB{jUP)"; //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); YuB+k^ SiteFileFetch fileFetch = new SiteFileFetch(bean); S*yjee<@ fileFetch.start(); V59(Z } kQ]$%Lk[ catch(Exception e){e.printStackTrace ();} ,@5I:X!rR v+99
-. F2X0%te } RejQ5'Neh K_&4D' QY= = GfHt public static void main(String[] args) Y3Q9=u*5 { 4j)tfhwd8 new TestMethod(); aMTu-hA } \6\<~UX^ } qP<Lr)nUH 点击下载更多相关资料
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