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/* XE>w& **SiteFileFetch.java >D
jJ*vM */ +\doF package NetFox; F?z:[1(: import java.io.*; t$Bu<frQ import java.net.*; lfAiW;giJ oVTXn=cYDp xfF;u9$; public class SiteFileFetch extends Thread { `fuQt4 _/czH<
gSa !zQN6 SiteInfoBean siteInfoBean = null; //文件信息Bean Gx7bV}&PN long[] nStartPos; //开始位置 M}!
qH.W long[] nEndPos; //结束位置 S:K$fFcJ FileSplitterFetch[] fileSplitterFetch; //子线程对象 /1v:eoF; long nFileLength; //文件长度 "38L ,PW0Z boolean bFirst = true; //是否第一次取文件 dWx@<(`OC boolean bStop = false; //停止标志 3(Ns1/;?, File tmpFile; //文件下载的临时信息 }[{9u#@# DataOutputStream output; //输出到文件的输出流 =H`yzGt ?KB]
/gT^ //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) xnC:?d public SiteFileFetch(SiteInfoBean bean) throws IOException =9Vo [ { gg/ts]$ siteInfoBean = bean; C2aA])7D //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); Q:j~
kutS| tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); A^E 6)A= if(tmpFile.exists ()) ,(RpBTV { '6kD6o_p1 bFirst = false; f|=u{6 read_nPos(); PqIskv+ } *;(^)Sj4Q else fP[S.7F+No { '`YZJ nStartPos = new long[bean.getNSplitter()]; jo?[M nEndPos = new long[bean.getNSplitter()]; gAh#H ?MM } gKY6S? l1#.rg V%{WH} JljCI@ } =k*XGbU t 9t
'9 ?(Ua+*b public void run() q'/o=De { 1{5t. //获得文件长度 oB%_yy+ //分割文件 +0 }_X //实例FileSplitterFetch C(9"59>{]y //启动FileSplitterFetch线程 c3Gy1#f:#2 //等待子线程返回 8{]nS8i try{ xFekSH7[F if(bFirst) !-N!Bt8; { ^Zp nFileLength = getFileSize(); mo3A *|U if(nFileLength == -1) m[(_fOd { BzzZ.AH~ System.err.println("File Length is not known!"); MRw4?HqB } _Rb2jq(&0 else if(nFileLength == -2) UM#.` { TqL+^:cq System.err.println("File is not access!"); hkyO_ns } qp)Wt6 k? else NjT*5 . { $_,-ESI for(int i=0;i<nStartPos.length;i++) *sZH3: { L&y"oAp< nStartPos = (long)(i*(nFileLength/nStartPos.length)); $qr6LIKGw } Qclq^|O0 for(int i=0;i<nEndPos.length-1;i++) M|j=J{r { 9gdK&/ulR nEndPos = nStartPos[i+1]; K9.Gjw } *Ti"8^`6 nEndPos[nEndPos.length-1] = nFileLength; #qmsZHd}b } _'ebXrbZB } TTFs|T6`q oGB|k]6]| F81EZ/ //启动子线程 $2}#):` fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; xpO;V}M| for(int i=0;i<nStartPos.length;i++) !zx8I7e4 { /gl8w-6 fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), pqb`g@ siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), '2i !RT- nStartPos,nEndPos,i); H8[A*uYL
Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); UOf\pG fileSplitterFetch.start(); ypG*41 } ~Gz9pBv1 // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), d"miPR siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); @y~kQ5k // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", f+hHc8g nEndPos = " + nFileLength); PU,$YPrZ // fileSplitterFetch[nPos.length-1].start(); ls&H oJ7 M-@X&bm,S A9 g%> //等待子线程结束 A]5];c //int count = 0; H\a"=&M //是否结束while循环 *9$SFe|&n: boolean breakWhile = false; wiZ ;m#4Q6k)V? ;aWk- while(!bStop) Vc;[ 0iB { 5|*`} ;/y write_nPos(); oPr`SYB Utility.sleep(500); [%^sl>,7 breakWhile = true; B+U:=591 1n!:L!,` 1u7D:h># for(int i=0;i<nStartPos.length;i++) J](NCD { `62v5d*>a if(!fileSplitterFetch.bDownOver) } v:YSG { 1J/'R37lP breakWhile = false; !pw)sO~ break; k:run2K } Fc5t,P } @}g3\xLiK if(breakWhile) CAC4A break; 0jlM~ H "%Y=+ lMGO4U[z //count++; >bze0`}Z //if(count>4) q0VAkVHw4 // siteStop(); *YeQCt-l } M=uT8JB iLuC_.'u= -i2rcH System.err.println("文件下载结束!"); }#H,oy;Dz } SK'h!Ye5Z catch(Exception e){e.printStackTrace ();} [M~tH *4" } KoNu{TJ W<prY }^Q:Q\ //获得文件长度 Zyz#xMmM public long getFileSize() j@z IJ { #Z2'Y[@. int nFileLength = -1; ylZQwICk try{ A|r3c?q URL url = new URL(siteInfoBean.getSSiteURL()); T3zovnR HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); n>y,{"J{ httpConnection.setRequestProperty("User-Agent","NetFox"); f_S$CFa@ OA3J(4!"W PO"lY'W.U int responseCode=httpConnection.getResponseCode(); /o;L,mcx* if(responseCode>=400) ~k?rP}>0 { ?lsK?>uU processErrorCode(responseCode); 80@\e return -2; //-2 represent access is error e`qrafa } V)<>W_g B&a{,.m&q6 gA(npsUHI String sHeader; f $Agcy H<_Tn$<zH. 4<#ItQ( for(int i=1;;i++) v zg^tJ { 8{G!OBxc\. //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); +QFKaS<sn //Utility.log(in.readLine()); .pUB.l$) sHeader=httpConnection.getHeaderFieldKey(i); h(/? 81: if(sHeader!=null) ta)gOc)r
R { PuP"(
M if(sHeader.equals("Content-Length")) x *I'Ar { ]2@(^x'= nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); 9!n:hhJM break; ,zoHmV1Wd+ } lm4A%4-db } L>14=Pr^( else M
+OVqTsFU break; |M7C=z=' } "rn } W]D YfR, catch(IOException e){e.printStackTrace ();} fYP,V0P catch(Exception e){e.printStackTrace ();} NRx 7S9W $Lstq_x+ ^s6~*n<fH Utility.log(nFileLength); h2zSOY{su aE 07# PL=v,NB return nFileLength; pqO3(2F9 } *,X)tZ6VX RDbNC v# 7-B|B{] //保存下载信息(文件指针位置) %_E5B6xi{ private void write_nPos() mHMsK}=~ { HAO-|=c4 try{ Vl1.]'p_ output = new DataOutputStream(new FileOutputStream(tmpFile)); 6h/!,j0:t_ output.writeInt(nStartPos.length); 7RUztu\_ for(int i=0;i<nStartPos.length;i++) t_Eivm-,B { ,.P]5 lE // output.writeLong(nPos); aZ~e;}w.Zq output.writeLong(fileSplitterFetch.nStartPos); @-)S*+8 output.writeLong(fileSplitterFetch.nEndPos); : _Y^o } G%~V b output.close(); l^R:W#*+U } 7{U[cG+a# catch(IOException e){e.printStackTrace ();} xCL)<8[R,} catch(Exception e){e.printStackTrace ();} |5;,]lbt } DH.` M
%zf?>]) -aJ(-Np$f //读取保存的下载信息(文件指针位置) =Jl\^u%H(x private void read_nPos() ;,U@zB;\%( { pu MVvo try{ bP$e1I3` DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); 6'*6tS int nCount = input.readInt(); o
Rk 'I nStartPos = new long[nCount]; 5L6.7}B nEndPos = new long[nCount]; z]g#2xD2 for(int i=0;i<nStartPos.length;i++) d
>L8SL { qX5]\nX&G nStartPos = input.readLong(); TCzz]?G]la nEndPos = input.readLong(); ;t7F%cDA } 1Mq"f7X8
input.close(); gm]q<~eMW } >7a
ENKOg: catch(IOException e){e.printStackTrace ();} B_Wig2xH0 catch(Exception e){e.printStackTrace ();} uu4!e{K } 7202N?a
{ ,FYA*}[ >*/
|tL private void processErrorCode(int nErrorCode) \l(}8;5} { q@1A2L\Om System.err.println("Error Code : " + nErrorCode); Q>yj<DR } D3 +|Os) B7A.~'= `o_i+?E //停止文件下载 3|e~YmZx public void siteStop() +:#g6(P] { h Q Att bStop = true; 'lC=k7@x for(int i=0;i<nStartPos.length;i++) #/(L.5d[ fileSplitterFetch.splitterStop(); Z^F>sUMR N<(rP1)`v ViOXmK" } U2_; } ZnbpIJ8cV //负责部分文件的抓取 L(y~
,Kc **FileSplitterFetch.java ,9:v2=C_ */ P'5Lu package NetFox; -K^(L#G <1sUK4nQ, f:t5`c. import java.io.*; ciHTnC import java.net.*; 10dK%/6/O ^y&2N ) \cnz public class FileSplitterFetch extends Thread { 'wLW`GX. T2T?)_f /
odeO(zuU String sURL; //File URL dZJU>o'BG long nStartPos; //File Snippet Start Position &6Wim<* long nEndPos; //File Snippet End Position 2zjY|g/ int nThreadID; //Thread's ID [di&N!Ao boolean bDownOver = false; //Downing is over ^> d"D boolean bStop = false; //Stop identical =:RNpi, FileAccessI fileAccessI = null; //File Access interface )6he;+ ,l)AYu!q4F ,(yaWd6 public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException -fz( ]d { H#`&!p this.sURL = sURL; ~r]$(V n
this.nStartPos = nStart; 6`'K M/ this.nEndPos = nEnd; xiQd[[(sM nThreadID = id; mc6W" fileAccessI = new FileAccessI(sName,nStartPos);//定位 .O4=[wE!U } na/,1iI< du=[ r wlX
K2D public void run() -uK@2}NZ
{ TkjZI}]2 while(nStartPos < nEndPos && !bStop) HtI>rj/\
x { >3ASrM+>w 52Q~` t7F (7PVfS>; try{ t9kqX(! URL url = new URL(sURL); QtqE&j HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); 'P >h2^z httpConnection.setRequestProperty("User-Agent","NetFox"); <dhBO String sProperty = "bytes="+nStartPos+"-"; *7/MeE6)i httpConnection.setRequestProperty("RANGE",sProperty); CY.i0 Utility.log(sProperty); `>$l2, P?U}@U~9 V^p XbDRl InputStream input = httpConnection.getInputStream(); 1A9Gf //logResponseHead(httpConnection); 6?jSe<4x T;JA.=I =Cr
F(wVO" byte[] b = new byte[1024]; [;i3o?\_I int nRead; []eZO_o6j while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) c"@,|wCUi { V_7QWIdiy> nStartPos += fileAccessI.write(b,0,nRead); [U?a %$G> //if(nThreadID == 1) /H[ !v:U // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); ig,v6lqhM } SQVyCxcX_ `BZX\LPHm
w4p<q68 Utility.log("Thread " + nThreadID + " is over!"); <q#/z&F! bDownOver = true; Q" an6ht| //nPos = fileAccessI.write (b,0,nRead); _:,U$W } (&Z`P catch(Exception e){e.printStackTrace ();} lvZ:Aw
r } ) bGzsb1\ } '@+a]kCMev S~LTLv:> .9;wJ9Bw[ //打印回应的头信息 \?.Tq24 public void logResponseHead(HttpURLConnection con) 27KfT]= { QZ51}i for(int i=1;;i++) 0?nm`9v6 { %phv <AW String header=con.getHeaderFieldKey(i); R+O[,UM^I~ if(header!=null) #r_&Q`!eU //responseHeaders.put(header,httpConnection.getHeaderField(header)); *b0f)y3RV Utility.log(header+" : "+con.getHeaderField(header)); \;smH;m else c,I|O'
&k break; p#95Q } _n+./B } kdrya
"Aq-H g FWbA+{8 public void splitterStop() z2lEHa?w { *Q8d&$ ^ bStop = true; l1qWl } Qm\VZ<6/5 {~ngI< woqP&8a } _ADK8a6%) ,4wZ/r>
d >@BvyZ)i /* S?5z **FileAccess.java .{1MM8 Q *//文件访问(定位,写) zV }-_u. package NetFox; ? h$>7| import java.io.*; huau(s0um m{bw(+r g[P8 public class FileAccessI implements Serializable{ S/
Y1NH .hCOi<wB //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 ;Vad| - RandomAccessFile oSavedFile; Z=Oo%lM6B long nPos; 24Y~x`W RJ%~=D @Kd lX>i public FileAccessI() throws IOException k.DDfuKN { LV&tu7c this("",0); ^zv28Wq> } [Uezi1I [;D4,@A o(.
PxcD public FileAccessI(String sName,long nPos) throws IOException XY5I5H_U { 3`&2- oSavedFile = new RandomAccessFile(sName,"rw"); ]OoqU-q this.nPos = nPos; kg$<^:uX oSavedFile.seek(nPos); (d[)U< } 6M"]p '$M=H. Rp)82-
. public synchronized int write(byte[] b,int nStart,int nLen) `n7z+ { n2R{$^JxO int n = -1; )#r]x1[Kn try{ tWi@_Rlx; oSavedFile.write(b,nStart,nLen); EeKEw
Sg n = nLen; YSt' ] } iuq-M?1 catch(IOException e) }@V(y9K { v"L<{HN e.printStackTrace (); Cl]E rg } <Ja> Xb42R1 "j9,3yJT return n; S"w$#"EJA } "!gd)^<e e.i5j^5u (?&X<=|" } J;+iW*E: LI?rz<H!D 0vUX^< /* HW{osav9 **SiteInfoBean.java QdG_zK>|e */ [[?:,6I package NetFox; H;}V`}c<` u|=_!$8 Ud:v3"1 public class SiteInfoBean { &M~*w~w` 0W9,uC2:N &D
uvy#J private String sSiteURL; //Site's URL ycRy!0l private String sFilePath; //Saved File's Path y-{^L`%Mk private String sFileName; //Saved File's Name 1A">tgA1 private int nSplitter; //Count of Splited Downloading File sW#6B+5_k NZ'S~Lr /_?Ly$>' public SiteInfoBean() xe|o(!( {//nSplitter的缺省值为5 Tul_/` An //default value of nSplitter is 5 VLN=9 this("","","",5); 8\`]T%h } BM1uZJ0 G1vWHa7n;f qp^O\>c public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) Tv3Bej { :p(3Ap2TY sSiteURL= sURL; Io{)@H"f sFilePath = sPath; q/?#+d sFileName = sName; ;_,= this.nSplitter = nSpiltter; I)]wi% %s%v|HDs U"A]b(54 } M/ 0!B_(R 'u{m37ZJ {$ HW_\w public String getSSiteURL() 9PVM06
{ $&='&q return sSiteURL; pcv (P } ^LE`Y>&m # h]m8 { o=4(RC public void setSSiteURL(String value) vL`wn= { ^vLHs=< sSiteURL = value; "?EA G } @U_w:Q<9u ce/Rzid f[HhLAVGK` public String getSFilePath() 3lqR(Hh3 { k+{-iPm{ return sFilePath; '%yWz)P } ^TJn&k =4"D8UaHr _y#t[|}w public void setSFilePath(String value) cj`g)cX| { ((\s4- sFilePath = value; aIpDf|~ } t(-noy) &7!&]kA+ Ka&[
Oz<w public String getSFileName() AdesR-e$R { %'nM!7w@I return sFileName; WLQm|C, } + O=wKsGD 7JD
jJQy 5vj;lJKcd` public void setSFileName(String value) CDQ}C=4 { N0oBtGb sFileName = value; Ra}%: } ZWQrG'$?o8 B\wH`5/KW ?1K|.lr public int getNSplitter() fHCLsI { {1;j1|CI return nSplitter; N W :_)1 } UB }n= $-[V)]h Q"n*`#Yt' public void setNSplitter(int nCount) MU4/arXy { Sg(fZ' - nSplitter = nCount; L!Iu\_{q } Q3vC^}Dmr } U8KB@E ce{(5IC i[/g&fx /* obKWnet **Utility.java T$5u+4>" */ %Sr/'7 K package NetFox; :p0|4g 3JV ENn9 ^I=c]D]); public class Utility { (lq7 ct Z{s&myd #5-5N5-1 public Utility() ="<5+G { j}7as& s+&Ts|c# yBqv'Y } 3e4; '5q; P9=L?t. //线程睡眠 wDswK "T public static void sleep(int nSecond) S=H<5*]g { xdb9oH try{ 7\m.xWX e Thread.sleep(nSecond); L1A0->t } Pw
i6Ly` catch(Exception e) 7?a@i;E< { ~L $B]\/A5 e.printStackTrace (); ivg:`$a[ } 8 #fzL7 } Rj 2N+59rg }#}IR5`=E //日志 7Gb1[3 public static void log(String sMsg) Q;{[U!\: { BayO+,>K System.err.println(sMsg); 8}9|hT;
} Z0*Lm+d9z 8Q&.S)hrN .J:04t1 public static void log(int sMsg) #RAez:BI { "Y0:Y?Vz" System.err.println(sMsg); !R*%F } , ,1H#;j } q>:>f+4 <Y~?G:v6+ fDyFkhc /* W:D'k^u **TestMethod.java Q-([3% */ ]"bkB+I package NetFox; :Awnj!KNCc T \%{zz_( UB[tYZ public class TestMethod { [U+6Tj, o=i)s2 6&/H
XqP public TestMethod() cx%[hM09 { ///xx/weblogic60b2_win.exe lF-;h{
try{ `H+~LVH SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); i*34/ //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); 7^$PauAv SiteFileFetch fileFetch = new SiteFileFetch(bean); H |8vW fileFetch.start(); #N%ATV } ]jo^P5\h> catch(Exception e){e.printStackTrace ();} +C3IP 7oY}=281 ! K? o H } i!
G^=N q~*3Bk~ YrAaL"20 public static void main(String[] args) _nw=^zS { !(\OT new TestMethod(); zTi%j$o } -$Bom } o6f^DG3* 点击下载更多相关资料
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