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/* im1]:kr7 **SiteFileFetch.java #j; &g1 */ o'D6lkf0 package NetFox; vx-u+/\ import java.io.*; P5aHLNit import java.net.*; gQ/zk3?k L:B&`,E !-2S(8 public class SiteFileFetch extends Thread { ~yO.R)4v lWOB!l M}@^8 SiteInfoBean siteInfoBean = null; //文件信息Bean RHB>svT^K> long[] nStartPos; //开始位置 cQ+V4cW
Z long[] nEndPos; //结束位置 0n3O;=[aV FileSplitterFetch[] fileSplitterFetch; //子线程对象 b5H[~8mf long nFileLength; //文件长度 ICV67(Ui boolean bFirst = true; //是否第一次取文件 S!g&&RDx boolean bStop = false; //停止标志 <y`yKXzBUV File tmpFile; //文件下载的临时信息 e1+
%c9UQ DataOutputStream output; //输出到文件的输出流 q:nYUW o Vr5a:u' //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) ;%U`lE0 public SiteFileFetch(SiteInfoBean bean) throws IOException T]E$H, p { qtgj"4,:` siteInfoBean = bean; MK=:L //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); v3@)q0@ tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); 1 k H if(tmpFile.exists ()) nre8 F { |t.WPp5, bFirst = false; i4Fw+Z read_nPos(); Hj2P|;2S } $1UN?(r else w1s#8: { ?|8H$1 nStartPos = new long[bean.getNSplitter()]; Z"E+ TX nEndPos = new long[bean.getNSplitter()]; 2Jj`7VH> } N*o+m~:y &O!d!Pf c"0CHrd sY1*WolA } TYLf..i< uswz@
[pa l kl#AH public void run() ,cbP yg { 2poU\|H //获得文件长度 _
k>j?j- //分割文件 /?by4v73P //实例FileSplitterFetch A
7TP1 //启动FileSplitterFetch线程 3HfT9 //等待子线程返回 -98bX]8 try{ Y3-15:- if(bFirst) wV(_=LF { n}._Nb
5 nFileLength = getFileSize(); (r7~ccy4 if(nFileLength == -1) cLB"<mG { $x`U)pv System.err.println("File Length is not known!"); XvdK; } g=Qj9Z
else if(nFileLength == -2) '9RHwKu&s { K,^b=_] System.err.println("File is not access!"); I@x*> } xi|iV1A else I*}:C { w#"c5w~ for(int i=0;i<nStartPos.length;i++) [%3{mAd { 'rd{fe_g! nStartPos = (long)(i*(nFileLength/nStartPos.length)); V:l; 2rW } 0eb`9yM for(int i=0;i<nEndPos.length-1;i++) >0~y"~M { tb_}w@:kU nEndPos = nStartPos[i+1]; 2>s:wABb / } Ou,B3kuQ+ nEndPos[nEndPos.length-1] = nFileLength; &Cdd } 67f#Z&r2k } mk[=3!J O0~[]3Y[= =I*"vwc? //启动子线程 _<5>
E fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; ^mG-O for(int i=0;i<nStartPos.length;i++) 2#|Q=rWB { 6idYz"P % fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), hQX|wWh siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), v|n.AGn nStartPos,nEndPos,i); OZ7MpQ Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); U[Z1@2zLx fileSplitterFetch.start(); ^yBx.GrQc } D4
e)v% // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), i%-c/ lop siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); Q@l3XNH|c // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", ^>]p4Q3 6 nEndPos = " + nFileLength); bD49$N?> // fileSplitterFetch[nPos.length-1].start(); F1MPo;e ,!Ah+x !f"@pR6 //等待子线程结束 o<%Sr* //int count = 0; R#Ss_y //是否结束while循环 )%UO@4 boolean breakWhile = false; 9#pl BtQ** !QC-> N !H iQ while(!bStop) 'm-s8]-W { a*??! write_nPos(); LoNz
1KJL Utility.sleep(500); w'U;b breakWhile = true; %Wu3$b ~2=B:; 'p{>zQ\5 for(int i=0;i<nStartPos.length;i++) o2Z#
5- { H?O* if(!fileSplitterFetch.bDownOver) X;zy1ZH { }X}fX#[ breakWhile = false; !9V_U break; M|76,2u } j>P>MdZtk } /S P^fB*y if(breakWhile) B;_M52-B break; 5a4;d+ et)A$'Q E[e '' //count++; 8Gs{Zfp!D //if(count>4) wVw3YIN# // siteStop(); _`ot||J } ~
dmyS?Or o- GHAQ @u$4{sjgf\ System.err.println("文件下载结束!"); /|hKZTZJdN } N{oD1% catch(Exception e){e.printStackTrace ();} $FCLo8/= } Jf4D">h lZE x0 >'E'Mp. //获得文件长度 g6r3V.X' public long getFileSize() / 1E6U6 { K]Ed-Tz8QZ int nFileLength = -1; YHg4WW$ try{ $40tAes9 URL url = new URL(siteInfoBean.getSSiteURL()); kg9ZSkJr HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); |P~TZ httpConnection.setRequestProperty("User-Agent","NetFox"); aq[kKS` |<9R% X[|-F3o int responseCode=httpConnection.getResponseCode(); eX$u if(responseCode>=400) 42X[Huy] { 2z&HT SI processErrorCode(responseCode); QnVYZUgJeV return -2; //-2 represent access is error \vojF\ } /R@eOl}D &o:wSe 6uR:/PTG String sHeader; bi[vs| w_4`Wsn ?v `0KF for(int i=1;;i++) [
98)7 { lYD-U8 //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); LB U]^t@ M //Utility.log(in.readLine()); wVV'9pw} sHeader=httpConnection.getHeaderFieldKey(i); If2f7{b if(sHeader!=null) l}K{=%U>7 { I`zn#U' if(sHeader.equals("Content-Length")) 57D /" { %A:<rO85o nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); exZa:9 sp break; +-K-CXt } YG!~v~sV } 4GeWo@8h else ;1K.SDj break; x4R[Q&:M } U
$e-e/ } !&?(ty^F catch(IOException e){e.printStackTrace ();} 0P&rTtU6 catch(Exception e){e.printStackTrace ();} 3zv_q&+8b 0ir] ^ JJ*pT: Utility.log(nFileLength); qAHQZKk >t 3%-Kc T"XZ[q return nFileLength; -7$7TD`'7 } `a98+x?JF 7_ZfV? . /vBOf;L //保存下载信息(文件指针位置) C.Y]PdYyj private void write_nPos() kk
)9!7 { F@)wi0 try{ M7BJ$fA0E output = new DataOutputStream(new FileOutputStream(tmpFile)); ^4h/6^b0c output.writeInt(nStartPos.length); <jY"+@rF for(int i=0;i<nStartPos.length;i++) bK<'J=#1 { Mb"i}Yt{ // output.writeLong(nPos); gW$X8ECX output.writeLong(fileSplitterFetch.nStartPos); `o)rAD^e output.writeLong(fileSplitterFetch.nEndPos); %F]4)XeW-+ } oj;Rh!O output.close(); fiES6VL } C`%cPl catch(IOException e){e.printStackTrace ();} OpW4@le_r catch(Exception e){e.printStackTrace ();} 9)];l?l } )zf&`T h/mmV:v [; //读取保存的下载信息(文件指针位置) ( Y'q%$ private void read_nPos() 1#gveHm]-G { mi`!'If0) try{ -1DQO|q# DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); M._9/
*C U int nCount = input.readInt(); M]vcW nStartPos = new long[nCount]; .m9s+D]fI nEndPos = new long[nCount]; PB(mUD2"r for(int i=0;i<nStartPos.length;i++) &k+jVymH { 4w<U%57 nStartPos = input.readLong(); f]jAa?d T& nEndPos = input.readLong(); 6X$]d^)h{ } iqRk\yq< input.close(); Y1h8O%? } [z5pqd- catch(IOException e){e.printStackTrace ();} WA\
P`'lg catch(Exception e){e.printStackTrace ();} `07xW*K(\Y } G\@uj>Z 9o@5:.b<j lc?9B private void processErrorCode(int nErrorCode) 7y""#-}V[r { )! Jo7SR System.err.println("Error Code : " + nErrorCode); yM`J+tq } Y(h86>z*w p~J|l$%0rQ Po~{Mpe //停止文件下载 ,9SBGxK5` public void siteStop() w@ALl#z;} { ^_0zO$z, bStop = true; p2cwW/^V for(int i=0;i<nStartPos.length;i++) (&H-v'a}3 fileSplitterFetch.splitterStop(); H$bu*o-Z 8E`A`z UFr
]$m& } qRlS^=# } >> yK_yg //负责部分文件的抓取 F%Oy4*4 **FileSplitterFetch.java yr8
b?m.x */ ]q~_ package NetFox; G6]W'Kk pN|BtrN{ =4+Wx8ZeW import java.io.*; :08b&myx import java.net.*; #;4<dDVy D"UCe7 [CTE"@A public class FileSplitterFetch extends Thread { 2#%@j6 <H03i"Z/S xn|M]E1) String sURL; //File URL MKMWHGN long nStartPos; //File Snippet Start Position F6^Xi"R[ long nEndPos; //File Snippet End Position _=!Rl# int nThreadID; //Thread's ID #29m <f_n boolean bDownOver = false; //Downing is over _
`5?/\7 boolean bStop = false; //Stop identical $2I^ ;5r[ FileAccessI fileAccessI = null; //File Access interface 4BF
\-lq~ @#m@ . )nE=H,U?y public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException vo<'7, { ;:nx6wi this.sURL = sURL; O1]L4V1iH this.nStartPos = nStart; wyWe2d this.nEndPos = nEnd; /&1FgSARK nThreadID = id; moz*=a fileAccessI = new FileAccessI(sName,nStartPos);//定位 !(2rU @. } sa6/$ 4OX|pa 7-S?\:J public void run() b{4@~>i { +OEqDXR+_ while(nStartPos < nEndPos && !bStop) 'y_<O |- { s9^r[l@W0U Ix~_.& Lh`B5 try{ 9vX~gh{]~ URL url = new URL(sURL); Q1hHK'3w HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); +8p4\l$<` httpConnection.setRequestProperty("User-Agent","NetFox"); \;#T.@c5 String sProperty = "bytes="+nStartPos+"-"; iwM$U(
9 httpConnection.setRequestProperty("RANGE",sProperty); J[ 0o6 Utility.log(sProperty); .: dy d R(.5Hs hJ|zX InputStream input = httpConnection.getInputStream(); gu:8+/W8L //logResponseHead(httpConnection); T)N_ ~f| <yNu/B.M =emcs% byte[] b = new byte[1024]; ' 5tk0A int nRead; q)N]*~ while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) ^UJB%l { KAkD" (! nStartPos += fileAccessI.write(b,0,nRead); =Pj+^+UM //if(nThreadID == 1) |-+ IF,j // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); 4zo^ b0v } =o_Ua^mr ;YGCsLT<xt R V@'$`Q Utility.log("Thread " + nThreadID + " is over!"); ,76xa%k(U| bDownOver = true; L'A9TW2 //nPos = fileAccessI.write (b,0,nRead); }Zuk}Og9+ } {~*^jS']5 catch(Exception e){e.printStackTrace ();} Ij w{g% } @*>kOZ(3 } }X|*+< t,P_&0X mc
FSWmq //打印回应的头信息 p<[gzmU9\b public void logResponseHead(HttpURLConnection con) =5l20
Um { _EEOBaZ for(int i=1;;i++) 3aX/)v.:4 { 2wX4e0cOI4 String header=con.getHeaderFieldKey(i); Xg4iH5!E if(header!=null) MJ.K,e //responseHeaders.put(header,httpConnection.getHeaderField(header)); nXRT%[o& Utility.log(header+" : "+con.getHeaderField(header)); sd
m4zV]& else !v fbgK break; THN//}d } WWBm*?U } HP,sNiw IoAG !cS mG\$W#+j public void splitterStop() Py72:;wn { -|.Izgc bStop = true; n5qg6(Tl] } XK+"
x! Vd&&GI(:?^ gc6Zy|^V4` } a]S0|\BkN ko-,l6E ; <NK /* '((pW **FileAccess.java {3LAK[C *//文件访问(定位,写) Tf*DFyr package NetFox; 4AWL::FU5 import java.io.*; y3+iADo.p $S6%a9m
E:$EK_?:t public class FileAccessI implements Serializable{ DWwPid}
" 'W_u1l/ //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 7{JIHY+ RandomAccessFile oSavedFile; >}7Ml long nPos; 'qy
LQ:6 o'?[6B>oj m%s&$ public FileAccessI() throws IOException c>b!{e@* { ,wYA_1$$H this("",0); BN>t"9XpW } ABaK60.O[O f`W)Z$fN5 )Vf!U" public FileAccessI(String sName,long nPos) throws IOException G4;5$YGG { a\l?7Jr oSavedFile = new RandomAccessFile(sName,"rw"); e0z(l/UB this.nPos = nPos; 1=@csO_yn oSavedFile.seek(nPos); $*')Sma } I6e[K(7NY b2r]>*Vc |L<p90 public synchronized int write(byte[] b,int nStart,int nLen) Rp0`%}2
o { ascY E int n = -1; ,j!%,!n o try{ cp_<y)__ oSavedFile.write(b,nStart,nLen); Q8Fqf
;4 n = nLen; <zWMTVaC } 1DRih>+# catch(IOException e) kMx^L;:n { @>Bgld&vl e.printStackTrace ();
eQU~A9 } SNOML7pd DJJd_ MXa(Oi2Gg return n; j;yKL-ycB } p>=i'~lQ6 v$)ZoM6E M/a40uK } 6* 6 |R93 %M5{-pJ|C kxH`
c /* ia#8 ^z **SiteInfoBean.java XVfw0-O */ l.Q.G<ol package NetFox; 8= "01 ^JMO POm 7R7e3p,K public class SiteInfoBean { 6>NK2} ` ){I!orQ "$#<+H>O private String sSiteURL; //Site's URL A4{p(MS5 private String sFilePath; //Saved File's Path 8|) $;. private String sFileName; //Saved File's Name N?s`a;Q[= private int nSplitter; //Count of Splited Downloading File [/Sk+ID I} .9 s H(io public SiteInfoBean() ]|_UpP8EP {//nSplitter的缺省值为5 &dky_H //default value of nSplitter is 5 6o)RsxN eu this("","","",5); )#l&BV5 } -P:o ^_)g eA_]%7+` br,xw c public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) mFrDV,V { cd._q2 sSiteURL= sURL; D k<NlH zp sFilePath = sPath; c5(4rT{(m sFileName = sName; rrP_7D this.nSplitter = nSpiltter; -q30tO. 3}2;*:p4Y lBzfBmEB } ><xJQeW eb>jT: Vji:,k=3\ public String getSSiteURL() |)*9BN { {,B.OM)J return sSiteURL; Wud-(19 } q8!X^1F7 F4]=(T `-w, 6 public void setSSiteURL(String value) WX*
uhR { 8o i{%C&- sSiteURL = value; VDFs.;:s } 1*f*}M Hxx]q+DAS wx8Qz,Z public String getSFilePath() &!F"3bD0 { WH_
W: return sFilePath;
i ?%_Pu } >rXD Lj-e 7.kgQ"?&
H X{K5 + public void setSFilePath(String value) N
u3B02D* { ?vP6~$*B sFilePath = value; "*LQr~k~} } y!c<P,Lt3f ws<pBC,m .*B@1q public String getSFileName() E[Q2ZqhgbP { wGw<z[:f return sFileName; op($+Q } O7oq1JI]Y !u;gGgQF MZ?+I~@ public void setSFileName(String value) TVF:z_M9 { Vn65:" O sFileName = value; M(1cf(<+ } o@L2c3?c5 lnGg1/ D*/fY=gK public int getNSplitter() S$=caZ? { >Cam6LJ return nSplitter; udS&$/&GH } y&V%xE/ +4+czfz i9|}-5ED public void setNSplitter(int nCount) L d{`k { &b'{3o_KN nSplitter = nCount; ZnBGNr } s"5nfl } pfR~?jYzm Lvrflx*Q A
^t _"J /* @~}~;}0x **Utility.java L}7 TM:% */ .kTOG'K\e package NetFox; ;ojJXH~$} 8)>4ZNXz BOD!0CR5 public class Utility { y;%\w-.\ M/,lP NHcA6y$Cz public Utility() J+TtM> { {e1sq^>| 0p+36g kjDmwa+91T } shEAr*u caxOxRo\ //线程睡眠 $pIo`F _W public static void sleep(int nSecond) +6x}yc:yd { p,tkVedR try{ \E'z+0 Thread.sleep(nSecond); 9
e|[9 } ] &SmeTe catch(Exception e) k7&
cc|y { ]Ot=At e.printStackTrace (); N_G84wxx } a)L|kux;l } F2{SC?U =sso )/3 //日志 1SH]$V4C public static void log(String sMsg) Yr\quinLL { #.vp\W System.err.println(sMsg); E:-~SH} } S|T_<FCY w}s5=>QG% 96S$Y~G#& public static void log(int sMsg) !K+hXQE1 { 1h#/8X System.err.println(sMsg); NZO86y/ } ac6@E4 _ } `(DHa=s1 mM~&mAa+Z JmeE}:5lpj /* W*?qOq
{ **TestMethod.java 3dJiu */ )3O#T$h package NetFox; 1]Cdfj6@ z "z qO/3:- public class TestMethod { #*%?]B= ^y%8_r&
{?q`9[Z public TestMethod() mwMu1# { ///xx/weblogic60b2_win.exe 4`ZoAr-5| try{ WJI}~/z;C SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); )L7[;(gQ //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); =$%-RX7 SiteFileFetch fileFetch = new SiteFileFetch(bean); v
V;]? fileFetch.start();
^6b5}{> } G$luGxl[ catch(Exception e){e.printStackTrace ();} WYP\J1sy JpZ_cb`<E' }{kn/m/ } :S}ZF$
$j% C,%Dp0 !1K.HdK public static void main(String[] args) NJmx(!Xsh { vE1:;%Q new TestMethod(); SrGJ#K&% } (pHJEY } 0 d+b<J, 点击下载更多相关资料
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