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/* Ve{n<{P **SiteFileFetch.java hd+]Ok7" */ TG}d3ZU
! package NetFox; %$@1FlqX; import java.io.*; j'K38@M:MN import java.net.*; F{<5aLaYti -? s&pKi yuOS&+,P public class SiteFileFetch extends Thread { kv6Cp0uFg >F1G!#$0 ~h-C&G,v SiteInfoBean siteInfoBean = null; //文件信息Bean xwRhs!`t1 long[] nStartPos; //开始位置 9lf*O0Z&n long[] nEndPos; //结束位置 6{q;1-8j+j FileSplitterFetch[] fileSplitterFetch; //子线程对象 vT|`%~Be long nFileLength; //文件长度 HPrq1QpK boolean bFirst = true; //是否第一次取文件 q:I$EpKf?Q boolean bStop = false; //停止标志 j 5Qo*p File tmpFile; //文件下载的临时信息 8S\RN&T$ DataOutputStream output; //输出到文件的输出流 u*3NS$vH UtnZNdlv //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) 07V8;A<, public SiteFileFetch(SiteInfoBean bean) throws IOException ,7W:fwdR { {(
#zcK siteInfoBean = bean; o*">KqU`b //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); Dj i^+;"& tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); cHx%Nd\ if(tmpFile.exists ()) JK]R*!{n { h.)h@$d bFirst = false; *U;'OWE[ read_nPos(); 9'?se5\ } aSC9&Nf; else )p<WDiX1!e { y<pnp?x4 nStartPos = new long[bean.getNSplitter()]; c.AYxI" nEndPos = new long[bean.getNSplitter()]; ~vHk&r]| } F.tfgW(A@ mpgO s -(i(02PX k|xtrW`qo; } Y34/+Fi G O{.9_2 *wuqa)q2 public void run() !*aPEf270 { u: &o}[ //获得文件长度 ~e `Bq> //分割文件 KzjC/1sd //实例FileSplitterFetch c~0{s> //启动FileSplitterFetch线程 oc7$H>ET1 //等待子线程返回 M*sR3SZ
try{ TX}T|ri if(bFirst) \ \06T` { \P;rES' nFileLength = getFileSize(); o! OMm! if(nFileLength == -1) 0fm*`4Q { ~
Vw9 System.err.println("File Length is not known!"); RBwO+J53y } ]}Z4P-"t else if(nFileLength == -2) ST5V!jz { Tlq-m2] System.err.println("File is not access!"); 'm3t|:nMU } X
T[zj<&_ else .B72C[' c { hB9Ee@ for(int i=0;i<nStartPos.length;i++) x}TS { p8}(kHUp( nStartPos = (long)(i*(nFileLength/nStartPos.length)); QSw<%pcJE@ } ht =P\E for(int i=0;i<nEndPos.length-1;i++) !}f1`/ { g13 rx%- nEndPos = nStartPos[i+1];
mO*^1 } #>[a{<;Kn nEndPos[nEndPos.length-1] = nFileLength; q5x[~]? } 5O<>mCF } |TsE-t*E} GOT1@.Y +k\Uf*wh //启动子线程 }|\d+V2On fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; /PzcvN
for(int i=0;i<nStartPos.length;i++) q[3x2sR { i;z{zVR fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), ^T5X)Nu{=C siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), h6_(?|:-( nStartPos,nEndPos,i); C NsNZJ Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); m8R9{LC fileSplitterFetch.start(); JL=U,Mr6 } bWWXc[O2&( // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), %FZ2xyI. siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); {ZU1x C // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", .zg8i_ nEndPos = " + nFileLength); 7O5`v(<9n> // fileSplitterFetch[nPos.length-1].start(); 5U`ZbG oF]cTAqhC. |re}6#TgcT //等待子线程结束 `B/0i A //int count = 0; i;/xK=L //是否结束while循环 g.py+
ZFJ boolean breakWhile = false; [XVEBA4GI wh6yPVVF/ Q=mI9 while(!bStop) oA] KE"T { ` x8J write_nPos(); xu5ia|gYz7 Utility.sleep(500); j/`94'Y breakWhile = true; k%s_0
@ <BFQ: &;yH@@Z for(int i=0;i<nStartPos.length;i++) r;BT,jiX { qfY5Ww$8 if(!fileSplitterFetch.bDownOver) o+w;PP)+= { Zxr!:t7 breakWhile = false; Fm\"{)V:b break; in+}/mwfC } x8Loyt_C } fmqb`% if(breakWhile) KWAb-yB break; 7ELMd{CD {]_uMg#! ;~fT,7qBah //count++; [.se|]t7X //if(count>4) Od+6 -J // siteStop(); [x=jH>Y } Kl7WQg,XOi ]i(-I <` 8Jf.ECQT System.err.println("文件下载结束!"); U,#yqER'r } > fnh+M catch(Exception e){e.printStackTrace ();} x:-.+C% } Z4<L$i;/jN T|J9cgtS L86n}+
P\ //获得文件长度 E )Gw0]G public long getFileSize() O[tvR:Nh { Q!-
0xlx int nFileLength = -1; P-F)%T[ try{ W} WI; cI URL url = new URL(siteInfoBean.getSSiteURL()); Lbe\@S HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); .2d9?p3Y httpConnection.setRequestProperty("User-Agent","NetFox"); :w}{$v}#D; T134ZXqqz ojYbR<jn9 int responseCode=httpConnection.getResponseCode(); Xq'cA9v=$J if(responseCode>=400) )u))n# P { Uc/+gz
Z; processErrorCode(responseCode); #/PA A return -2; //-2 represent access is error DPi_O{W> } 5T sU Qc J+rCxn?;g V5+SWXZ String sHeader; "$s~SIUB A-:O`RK 5F`;yh+e for(int i=1;;i++) KiG p[eb { ;&H4u) //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); z/i+EE //Utility.log(in.readLine()); 21k5I #U sHeader=httpConnection.getHeaderFieldKey(i); r0p w_j if(sHeader!=null) YK|bXSA[ { [MuEoWrq(} if(sHeader.equals("Content-Length")) t78k4? { I*9e]m" nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); 8XbA'% o break; @lJzr3}WZ } <ZU=6Hq } $w"$r$K9K else /cc\fw1+ break; o7IxJCL=Q } hig2
} [+O"<Ua catch(IOException e){e.printStackTrace ();} .<kqJ|SVi catch(Exception e){e.printStackTrace ();} KNH1#30 K v<Bynd- y%
:4b@< Utility.log(nFileLength); 2]% h$f+ E=){K UH3sH
t return nFileLength; >2#8B } mPq$?gdp wAnb
Di{W !w&kyW?e //保存下载信息(文件指针位置) 2^?:&1: private void write_nPos() apE { n3J53| %v try{ cwGbSW$t output = new DataOutputStream(new FileOutputStream(tmpFile)); NcY608C output.writeInt(nStartPos.length); }9nDo*A"} for(int i=0;i<nStartPos.length;i++) 9"g6C< { c- .t>r& // output.writeLong(nPos); $-[CG7VgX% output.writeLong(fileSplitterFetch.nStartPos); '\jd#Kn'h output.writeLong(fileSplitterFetch.nEndPos); (b`]M`Fc } % YOndIS: output.close(); T|tOTk } 6e7{Iy catch(IOException e){e.printStackTrace ();} )7_"wD`
z catch(Exception e){e.printStackTrace ();} GR\5WypoJ } fS^!ZPe1 zt^48~ry ~|<m,)! //读取保存的下载信息(文件指针位置) .*elggM private void read_nPos() 'M3">$N { 610D%F try{ WxF:~{ DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); [s<^&WM/ int nCount = input.readInt(); L~ s3b nStartPos = new long[nCount]; !UFfsNiXZ nEndPos = new long[nCount]; Rb\6;i8R for(int i=0;i<nStartPos.length;i++) ZyEHzM{$ { 7Pa@1'] nStartPos = input.readLong(); np~~mdmRK nEndPos = input.readLong(); V2N_8)s9W } PfkrOsV/m input.close(); 28
3H }
>0l"P"] catch(IOException e){e.printStackTrace ();} !t i6 catch(Exception e){e.printStackTrace ();} id$Ul?z8 } 02Ia2e.f <})'Y~i 7
[g/TB private void processErrorCode(int nErrorCode) P6MRd/y | { gzeQ|m2] System.err.println("Error Code : " + nErrorCode); hR.@b*q?R } L<fvKmo(fw ZY:[ekm%4Z .Lfo)?zG //停止文件下载 Mg^e3D1_ public void siteStop() o=nsy]'& { umdG(osR bStop = true; T~b>B`_ for(int i=0;i<nStartPos.length;i++) 29reG,> fileSplitterFetch.splitterStop(); w |l1' KM`eIw>8 &N;-J2M } , lJv } +*_5tWAc //负责部分文件的抓取 `SVmQSwO[ **FileSplitterFetch.java l&}y/t4% */ CpJ0m-7aIH package NetFox; uPniLx\t: Y[ N^p#t{ +S=Rn, import java.io.*; vVE7fq3 import java.net.*; Kt(-@\)! nJ"
' oTT7M`P3h public class FileSplitterFetch extends Thread { _sbp6ZO_ sdS^e`S not YeY7wR String sURL; //File URL ~,2/JDVJ5- long nStartPos; //File Snippet Start Position wfjnA~1h long nEndPos; //File Snippet End Position Dr6A,3B int nThreadID; //Thread's ID bBY^+c< boolean bDownOver = false; //Downing is over `8FUX= Sh boolean bStop = false; //Stop identical /x1MPP>fu FileAccessI fileAccessI = null; //File Access interface ]%!u7z|\6 ?MQ.% J `l*;t`h public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException F-*2LMe { ?ByM[E$ this.sURL = sURL; xz:J this.nStartPos = nStart; O2"gj"D this.nEndPos = nEnd; 2./3 \n2 nThreadID = id; +Y+Y6Ac[} fileAccessI = new FileAccessI(sName,nStartPos);//定位 r:]1O* } @9&P~mo/ Y \:0Ev HEGKX] public void run() gsn)Wv$h { WAn'kA while(nStartPos < nEndPos && !bStop) |c`w'W?C6 { > ,DbNmi (L`j0kPN WMj}kq)SY) try{ CSCN['x URL url = new URL(sURL); n>'Kp T9| HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); 7-BvFEM; httpConnection.setRequestProperty("User-Agent","NetFox"); RW P<B0) String sProperty = "bytes="+nStartPos+"-"; X_v[MW httpConnection.setRequestProperty("RANGE",sProperty); 0VK-g}"x Utility.log(sProperty); 'fL"txW 5MSB dO XbQlHfrS InputStream input = httpConnection.getInputStream(); FW.$5*f=' //logResponseHead(httpConnection); EJ`T$JD \Y}3cE mZUfn%QXb( byte[] b = new byte[1024]; 3 LdQ]S int nRead; X*L;.@xA while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) &
=/ { C
XHy.&Vt nStartPos += fileAccessI.write(b,0,nRead); *x)8fAr //if(nThreadID == 1) TW^/sx // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); Lq>&d,F06) } z.rh]Zq rL5z]RY t5lO'Ll*Q] Utility.log("Thread " + nThreadID + " is over!"); b9XW9O`B bDownOver = true; !|<=ZF2 //nPos = fileAccessI.write (b,0,nRead); O3CFme } =!Q7}z1QI catch(Exception e){e.printStackTrace ();} 95<EN(oUD } %2V-~.Ro6 } Rml2"9"`
RDtU43 Q#IG; //打印回应的头信息 i{I~mrm/'\ public void logResponseHead(HttpURLConnection con) VS&TA> { b^[F""!e for(int i=1;;i++) [2|kl
l { WYc7aciJ String header=con.getHeaderFieldKey(i); vp(;W,ba:| if(header!=null) #b7$TV //responseHeaders.put(header,httpConnection.getHeaderField(header)); wR{'y)$ Utility.log(header+" : "+con.getHeaderField(header)); wW"z else
&ZTr break; A 8 vbQ } 6&bIXy } !a~`Bs$'jr i%6; SIKOFs public void splitterStop() _{|D { xW[ -n bStop = true; |7#[ (%D! } o!~Jzd.=h 1@gg uRF: G7=pBf } W0=O+0$^ 9!><<7TS V_Wwrhua /* #6!5 2 **FileAccess.java V#jWege *//文件访问(定位,写) F_bF package NetFox; apk4j\i?5 import java.io.*; ,<A$h3* .6OgO{P: a
{ab*tM public class FileAccessI implements Serializable{ }^(}HBT ,j 5&6X=1M //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 l$hJE;n RandomAccessFile oSavedFile; S1U@UC long nPos; zm,@]!wI "k Te2iS D3c2^r$Z public FileAccessI() throws IOException V)P&Zw { "@9?QI} this("",0); <9sO } F,5r9^,_ [TCP-bU MC,>pR{ public FileAccessI(String sName,long nPos) throws IOException =YG _z^' { ` gW<M oSavedFile = new RandomAccessFile(sName,"rw"); mm5$>
[%U this.nPos = nPos; Uje|`<X oSavedFile.seek(nPos); ,/O[=9l36R } v2,%K`pAU QKE9R-KTE z_
=Bt public synchronized int write(byte[] b,int nStart,int nLen) I!wX[4p eg { <58l;<0 int n = -1; [&*6_q"V try{ 2m>-dqg oSavedFile.write(b,nStart,nLen); l6kmS n = nLen; ~}ET?Q7t } LJ VG~Yeo catch(IOException e) A^2L~g[^Q { L^^4=ao0 e.printStackTrace (); V]S1X^ } OMk5{-8B 0[<~?`:) 5b/ojr7 return n; G4
G5PXi } -{
u*qtp N S#TW !Oi~:Pp } +PK6-c\r ,p;_\\< yFhB>i /* e5Mln!.o **SiteInfoBean.java d`d0N5\ */ W9oAjO NE package NetFox; 8 ^B;1`# %c)[
kAU! B cj/y4" public class SiteInfoBean { pG"5!42M! ] xd^% q* u
=gt<1U private String sSiteURL; //Site's URL 1b9hE9a{j private String sFilePath; //Saved File's Path 6bBdIqGb} private String sFileName; //Saved File's Name E0oU$IB private int nSplitter; //Count of Splited Downloading File gh6d&ucQ^ !AJ]j|@VBd Npn=cLC& public SiteInfoBean() H.G!A6bd {//nSplitter的缺省值为5 KLC{7"6e) //default value of nSplitter is 5 TzBzEiANn this("","","",5); f f 7( } V,EF'-F nY $tp iq*A("pU public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) UofTll) { ^zEE6i sSiteURL= sURL; n-QJ;37\ sFilePath = sPath; 0|D&"/.R#! sFileName = sName; V[a[i>,Z this.nSplitter = nSpiltter; >"3>fche ]TstSF= A"Q@W<. } R.s|j= `P@- %T ]IJv-( public String getSSiteURL() mDFlz1J,e { Ri>?KrQF% return sSiteURL; `:M^8SYrL } 5jq=_mHt @6o]chJo djT5X public void setSSiteURL(String value) d77r9 { -v?hqWMp# sSiteURL = value; 7t-Lz|
$" } }%{MPqg NN
0Q`r,8} r+<{S\ Q public String getSFilePath() 5(&xNT-n8 { F=)eLE{W return sFilePath; HI&kP+,y } R|!B,b( xn}BB}s{t *@ED}Mj+ public void setSFilePath(String value) GbU@BN+_ { ^+?|Qfi sFilePath = value; +pqM ^3t|y } pJ,@Y> ED} 31L K
X]oE+: public String getSFileName() i[semo\E { /-0'
Qa+* return sFileName; I_ "Z:v{ } UBO^EVJ U/qE4u1J6M ]B9 ^3x[: public void setSFileName(String value) ?TEK=mD#u { -T/W:-M( sFileName = value; ZI ?W5ISdg } 6ew "fCrH! 2H?d+6Pt3 %c^ m\E public int getNSplitter() yZ}d+7T} { +~2rW8 return nSplitter; ,yLw$- } iz}sM>^ Qu{cB^Ga* ;)!"Ty| public void setNSplitter(int nCount) G5]1s { 9-jO,l nSplitter = nCount; KO]N%]:&~ } w\|Ei( } i~qfGl p6) .6T6 S
v 2Eh@e([PMs /* SlT*C6f **Utility.java =;c_} VY */ B!aK package NetFox;
YRB%:D@u Fm j= g{pQ4jKF public class Utility { 6*1$8G`$8, _py2kjA6 0kCQ0xB[a5 public Utility() J+<p+(^*v { T% CxvZ [5 pCL0<c@ W7G9Kx1Y } nx4P^PC P0\eBS //线程睡眠 7$b?m6fmK public static void sleep(int nSecond) w4MwD?i]R { @eQld\h' try{ VTh$a_P> Thread.sleep(nSecond); 5A_4\YpDR } `n-vjjG%# catch(Exception e) ?=|kC*$/G { F>Y9o-o2 e.printStackTrace (); /B HepD} } oP$kRfXS!< } Z}cIA87U k7 bl'zic //日志 .`L gYW public static void log(String sMsg) @oH[SWx { {tzxA_ System.err.println(sMsg); 8@7AE" } q9}2 shi
Hy*(v dl/X."iv! public static void log(int sMsg) N
<pbO#e { k0&lu B% System.err.println(sMsg); F ! )-|n} } <lld*IH } =l|>.\- zv%J=N$G ZzL@[g /* F2oJ]th.3 **TestMethod.java <%,'$^'DS */ X!0kK8v package NetFox; VJ1*|r, /e 5\ 9 anx&Xj|=.F public class TestMethod { Q#rt<S1zW IrO+5 w M]ap: public TestMethod() u:4["ViC { ///xx/weblogic60b2_win.exe tyXl}$)y try{ #Go(tS~o SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); t.z$j //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); T7GQ^WnA SiteFileFetch fileFetch = new SiteFileFetch(bean); ;nf&c;D fileFetch.start(); Iu6W=A } R@ QQNYU.D catch(Exception e){e.printStackTrace ();} rdI]\UH )<LI%dQ:'l +2O=s<fp } MuSaK % Es:6 u`p_.n:5) public static void main(String[] args) 1jOKcm'# { Qk7J[4 new TestMethod(); v!!;js^ } "8t\MKt( } J8h7e}n? 点击下载更多相关资料
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