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/* >7V96jL$Y **SiteFileFetch.java sf<S#;aYqn */ ~k^rI jR package NetFox; (y*7
gf import java.io.*; :k*'MU} import java.net.*; Ub2t7MU &)zNu HIsIW%B public class SiteFileFetch extends Thread {
W8z4<o[$ O3/][\ A<fKO <d SiteInfoBean siteInfoBean = null; //文件信息Bean ;4>YPH long[] nStartPos; //开始位置 Tty_P, long[] nEndPos; //结束位置 o$;t FileSplitterFetch[] fileSplitterFetch; //子线程对象 Ti$G2dBO long nFileLength; //文件长度 WK)hj{k boolean bFirst = true; //是否第一次取文件 NvW`x boolean bStop = false; //停止标志 6<u=hhL File tmpFile; //文件下载的临时信息 r'/&{?Je/ DataOutputStream output; //输出到文件的输出流 AJ}QS?p8s YcOPqvQ //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) O]3$$uI=QE public SiteFileFetch(SiteInfoBean bean) throws IOException =PYfk6j9 { =.a} siteInfoBean = bean; RtO3!dGT. //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); >'ev_eAk tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); "\cDSiD if(tmpFile.exists ()) JZI)jIh { 2[
=
=
bFirst = false; <:/Lap#D^ read_nPos(); (VV5SvdE } 6
<XQ'tM]N else >Q3_-yY+ { h;cl+c|B nStartPos = new long[bean.getNSplitter()]; DB%}@IW" nEndPos = new long[bean.getNSplitter()]; -@L7!,j } =z^2KH IJa6W`} fGjYWw
q)te/J@ } i^T@jg+K J=7.-R|t h K;9XJAf public void run() -LzkM" { !l NCuR/T //获得文件长度 -w' //分割文件 *U>"_h T0 //实例FileSplitterFetch @n2Dt d //启动FileSplitterFetch线程 %hDx UZ#0 //等待子线程返回 niC ;WK try{ I]Ev6>=; if(bFirst) ]Q0m]OaT { sjGy=d{:oL nFileLength = getFileSize(); vz6No%8X if(nFileLength == -1)
C 2t] { X})5XYvA* System.err.println("File Length is not known!"); b3. } [l44,!Z& else if(nFileLength == -2) corNw+|/w { c"KN;9c, System.err.println("File is not access!"); Db4(E*/pj! } {=K);z else zVt1Ta:j { b'q ru~i for(int i=0;i<nStartPos.length;i++) jkAWRpOc) { xmVW6 ,<? nStartPos = (long)(i*(nFileLength/nStartPos.length)); ?vt#M^Q
} )7]la/0 for(int i=0;i<nEndPos.length-1;i++) x{DTVa
6y2 { K@%o$S?>z_ nEndPos = nStartPos[i+1]; 0JT"Pv_ } D/[;Y<X#V nEndPos[nEndPos.length-1] = nFileLength; n?Zt\Kto } Gh%R4)} } u,RR|/@ =csh=V@s H4B|c42 //启动子线程 :j2?v(jT_l fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; 21k,{FB'? for(int i=0;i<nStartPos.length;i++) '/="bSF { [~NJf3c" fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), j(~e{HZ siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), uB=DC'lkg nStartPos,nEndPos,i); t=nZ1GZyM Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); ,V^2Oa fileSplitterFetch.start(); k3(q!~a:.} } QmgO00{ // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), lA{JpH_Y8s siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); .;\uh$c // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", B4@1WZn<8 nEndPos = " + nFileLength); e&@;hDmIX // fileSplitterFetch[nPos.length-1].start(); L"KKW
c knfEbH MJ"@ //等待子线程结束 %$Dn);6= //int count = 0; VLPPEV-u //是否结束while循环 b>h
L*9 boolean breakWhile = false; gmqA 5W~y &]"Z x0t5% 'XJqh|G while(!bStop) LZtO Q__B) { E"%dO write_nPos(); |LV}kG(2 Utility.sleep(500); t:x"]K breakWhile = true; C/?x`2' j>8S,b=% n'To: for(int i=0;i<nStartPos.length;i++) a B$x(8pP@ { DD5cUlOSu if(!fileSplitterFetch.bDownOver) LpK? C<?x { >P+oNY breakWhile = false; %i6/=
'u break; uc{s\_ } Pm7lP5 } 7}1Z7"? if(breakWhile) R]&lVXyH break; S5BS![-QK L35]'Jua enGZb& //count++; ~9y/MR //if(count>4) 9!_JV;2 // siteStop(); r^7eK)XA_ } /HH_Zi0?N| .wV-g:2 ;il+C!6zpf System.err.println("文件下载结束!"); A]laS7Q } 00B,1Q HP catch(Exception e){e.printStackTrace ();} 82)%`$yZw[ } e'yw8U5E/ ]GT+UX >*/:"!u //获得文件长度 w5 #;Lm public long getFileSize() NR,R.N^[ { wRdN(`;v int nFileLength = -1; EK.n
$ try{ {%_D>y URL url = new URL(siteInfoBean.getSSiteURL()); \9fJ)*- HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); eZ]>;5 httpConnection.setRequestProperty("User-Agent","NetFox"); j[Jwa*GQP V%(T#_E/6 An_3DrUFV_ int responseCode=httpConnection.getResponseCode(); U3jnH if(responseCode>=400) xS4?M<|L63 { 63(XCO processErrorCode(responseCode); OI_Px3)
y return -2; //-2 represent access is error Co,?<v=Ll } 2# P~#LbUP( SdF+b+P] String sHeader; d\R "?Sg 1#3eY?Nb K]1|#`n for(int i=1;;i++) n&!q9CR` { )(OGo`4Qz //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); ^RE[5h6^q //Utility.log(in.readLine()); L&KL]n sHeader=httpConnection.getHeaderFieldKey(i); v.ow`MO=; if(sHeader!=null) . HN4xL { *k,{[b if(sHeader.equals("Content-Length")) t7yvd7 { LSR0yCU
nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); i= R%MH+ break; K8/jfm } !UR3`Xk } Y(] W+k< else #)#J`s1R break; 1LaJ
hrp? } T_qM@/f } e7y,zcbv catch(IOException e){e.printStackTrace ();} SQ*%d.1 catch(Exception e){e.printStackTrace ();} c'XSs m70AWG .+mP#<mAg Utility.log(nFileLength); Lf:#koaC guVuO ,k1ns?i9KH return nFileLength; p-m\0tQ } G)?j(El
<00nu'Ex1v R_9M-RP6* //保存下载信息(文件指针位置) ]*U+nG private void write_nPos() #)m[R5g( { 62kA(F0e, try{ XTA:Y7"O output = new DataOutputStream(new FileOutputStream(tmpFile)); #]QS output.writeInt(nStartPos.length); V*r/0|vd for(int i=0;i<nStartPos.length;i++) }+}Cl T { L{GlDoFk // output.writeLong(nPos); Z<W f/ output.writeLong(fileSplitterFetch.nStartPos); CfO{KiM(2 output.writeLong(fileSplitterFetch.nEndPos); P'[ISGt } z}iz~WZ output.close(); fu{v(^ } vM-kk:n7f catch(IOException e){e.printStackTrace ();} KYy oN catch(Exception e){e.printStackTrace ();} Q@|"xKa } r"7PSJ tJ*/5k
& \Unawv~ //读取保存的下载信息(文件指针位置) {3SK|J` private void read_nPos() <Qr*!-Kc6 { elR1NhB|p try{ Bp5%&T k DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); t<"`gM^| int nCount = input.readInt(); m;nH
v nStartPos = new long[nCount]; 9ei<ou_s nEndPos = new long[nCount]; QCG-CzJ9l for(int i=0;i<nStartPos.length;i++) ;dtA-EfOZ { VU6+"2+'2 nStartPos = input.readLong(); Lctp=X4 nEndPos = input.readLong(); 9=FH2|Z } mKE'l'9A_ input.close(); oKr= ]p } z8r?C catch(IOException e){e.printStackTrace ();} $m-C6xC/ catch(Exception e){e.printStackTrace ();} C8i4z } K47.zu ,<C~DSAyZ >l=jJTJ;q private void processErrorCode(int nErrorCode) rLY I\ { I.Xbowl System.err.println("Error Code : " + nErrorCode); C?MKbD=K } zlB[Eg^X \acGSW
.c ny!80I //停止文件下载 ,-kz\N@. public void siteStop() M04u>|
, { fOKAy' bStop = true; =*.S<Ko) for(int i=0;i<nStartPos.length;i++) z
=\ENG|x# fileSplitterFetch.splitterStop(); DZ $O% i+Mg[x$. |MN2v[y } Bs|#7mA[ }
hhhxsGyv //负责部分文件的抓取 @$CPTv3e **FileSplitterFetch.java 6(7dr?^eGT */ ;mr*$Iu 7| package NetFox; >L8 &6aU 0+)1KU)I @*uZ+$ import java.io.*; !HtW~8|: import java.net.*; oA:`=f%\ .
Y$xNLoP[ {d0
rUHP public class FileSplitterFetch extends Thread { I)9, VV#'d
f+.sm String sURL; //File URL +QOK]NJN long nStartPos; //File Snippet Start Position Jh36NE8r long nEndPos; //File Snippet End Position 0W_u"UY$c int nThreadID; //Thread's ID GuaF B[4 boolean bDownOver = false; //Downing is over ({$rb- boolean bStop = false; //Stop identical &os:h]
C FileAccessI fileAccessI = null; //File Access interface ~$rSy|19 mVN\ (dy:d^ public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException _PQk<QZ { <]_[o:nOP this.sURL = sURL; ^rO!- this.nStartPos = nStart; }[PC
YnS this.nEndPos = nEnd; 7AqbfLO nThreadID = id; z5D*UOy5M fileAccessI = new FileAccessI(sName,nStartPos);//定位 C[l5[DpH } J l{My^I5 T1 1>&K) Q ~n%c7 public void run() _KBa`lhE { \/nSRAk while(nStartPos < nEndPos && !bStop) ~]9EhC'l { cXr_,>k I"QU{]|J |+JC'b?, try{ ccx0aC3@I URL url = new URL(sURL); }AiF 7N0 HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); Z.rhM[*+0C httpConnection.setRequestProperty("User-Agent","NetFox"); >z%WW&Z' String sProperty = "bytes="+nStartPos+"-"; T.B7QAI. H httpConnection.setRequestProperty("RANGE",sProperty); wbk$(P'gN Utility.log(sProperty); ytb1h Fs S)'&+HamI r%>7n,+o InputStream input = httpConnection.getInputStream(); OHnsfXO_V //logResponseHead(httpConnection); glkH??S 7j(gW MX+gc$Y
O byte[] b = new byte[1024]; w4&\-S# int nRead; b `}hw"f while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) Z Y5Pf
1 { x2/ciC
nStartPos += fileAccessI.write(b,0,nRead); 8o).q}>& //if(nThreadID == 1) +1\t0P24 // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); m,6[; } fEtBodA) 7h:EU7 ^gY'^2bzxu Utility.log("Thread " + nThreadID + " is over!"); /YvwQ bDownOver = true; jfam/LL{V //nPos = fileAccessI.write (b,0,nRead); Adfnd } r;>.*60AT catch(Exception e){e.printStackTrace ();} hvA|d=R( } m%.[|sZ3EM } gO@LJ uu>R)iTQ%S Zw<<p|{)< //打印回应的头信息 ?+%bEZ` public void logResponseHead(HttpURLConnection con) ; 3sjTqD { FF|M7/[~ for(int i=1;;i++) [o7Qr?RN { :2XX~| String header=con.getHeaderFieldKey(i); sv#b5,>9 if(header!=null) s"2+H}u //responseHeaders.put(header,httpConnection.getHeaderField(header)); g0IvcA Utility.log(header+" : "+con.getHeaderField(header)); VCIV*5
P else I=
cayR break; PIoBK CJ } ^V]IPGV } A ^zd:h- M=4b TZ}y%iU:mB public void splitterStop() m}>Q#IVZ { A>RK3{7 bStop = true; }gE^HH' } 6!;D],,"#. k\g:uIsv$ vWL|vR } glBS|b$\: $ERiBALN: |8)\8b|VuC /* IP)%y%ycw **FileAccess.java I%B\Wy/j^ *//文件访问(定位,写) x`2du/
C package NetFox; gr# |ZK.` import java.io.*; s3K!~v\L] 'tjqfR >Nx4 +| public class FileAccessI implements Serializable{ 9;L8%T
( K<5 0>uG //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 :YLurng/] RandomAccessFile oSavedFile; k[@/N+;")` long nPos; ~]'yUd1gSZ gg Nvm
*D1vla8 public FileAccessI() throws IOException 1(e64w@ { .SNg2. this("",0); \Xr*1DI< } >t%@)]*N IlB*JJnl .Sv/0&O public FileAccessI(String sName,long nPos) throws IOException k]2_vk^ { MN:LL
< oSavedFile = new RandomAccessFile(sName,"rw"); E Q:6R|L this.nPos = nPos; |=V~CQ] oSavedFile.seek(nPos); y'non0P. } >Pvz5Hf/wW vskp1 Wi( upZf&4 I8 public synchronized int write(byte[] b,int nStart,int nLen) &VG { iqN?'8 int n = -1; ^ohIJcI- try{ c:
(nlYZ oSavedFile.write(b,nStart,nLen); #]Jg> n = nLen; }d5~w[ } O]Yz7 catch(IOException e) r@
! { H?V
b e.printStackTrace (); 6)>otB8)J } U\-R'Z>M rZ2cC# _6g(C_m'T? return n; ${gO=Z } ?},RN $ ?|;w,%I =hY/Yr%P } s#(%u t H5o=nWQ6e
;kT~&.,y /* 8Dn~U:F/? **SiteInfoBean.java wzBw5nf\ */ py'xBi6}v package NetFox; )t CNp sk
AF6n {i}E)Np public class SiteInfoBean { k+Z2)j" [khXAf1{Q zJ@^Bw;A^@ private String sSiteURL; //Site's URL ntW1 )H'o private String sFilePath; //Saved File's Path S,Tc\} private String sFileName; //Saved File's Name QZ*gR#K]Sz private int nSplitter; //Count of Splited Downloading File [ugr<[6 MV07RjeS G&"O)$h public SiteInfoBean() t+{vbS0 {//nSplitter的缺省值为5 '|<S`,'#hg //default value of nSplitter is 5 &:1q3gDm this("","","",5); \xQu*M:! } 7:<A_OLi +oL@pp0 \1QY=} public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) G.PRPl { 'K#ndCGJ$ sSiteURL= sURL; %joL}f[ sFilePath = sPath; JV_VM{w{K sFileName = sName;
T;V!>W37 this.nSplitter = nSpiltter; Xg*](>/\, V)vik 8IE^u<H(: } u(\O@5a -Zp BYX5e_ !SIk9~rJ public String getSSiteURL() sV\K[4HG { e6^}XRyf return sSiteURL; 2U(qyC } 0N$FIw2 %$i}[U [^^ Pl:+ public void setSSiteURL(String value) TwI'XMO;A {
qI${7 sSiteURL = value; 6CSoQ|c{ } 0%4OmLBT %%zlqd"0 e[0"x.gu public String getSFilePath() `csZ*$7 { p@[ fZj return sFilePath; <fV][W } yc`*zLWh J0oeCb +-,iC6kK public void setSFilePath(String value) Vjw u:M { euVj,m sFilePath = value; -3guuT3x\ } iq[IZdza xc\zRsY` d325Cw? public String getSFileName() F\L!.B { D/GE-lq return sFileName; RBBmGZ } >k/cm3 8/&4l,M5 51y#AQ@ public void setSFileName(String value) _A])q { ic"8'Rwb sFileName = value; tC5-^5[y } UGj |)/ n.z,-H17 '+27_j public int getNSplitter() ${eV3LSC { QWEE%}\3} return nSplitter; 0U H] } \4^rb?B (<8}un c?u*,d) G public void setNSplitter(int nCount) ,wXmJ)/WZ { )*S:C nSplitter = nCount; Kf*Dy:e } G$%F`R[ } .Y"F3
R 32j}ep.* rNTLP
m
/* C4P<GtR9 **Utility.java 0bT[05. */ KIag(!& package NetFox; Wpi35JrC [uLsM<C 4+s6cQ]S` public class Utility { u3GBAjPsIk ~BX=n9 [/%N2mj public Utility() e}S+1G6r) { f'H|K+bO ^gZ,A]
d7
H *F } /XEW]/4 JXYZ5&[ //线程睡眠 ~x#TfeU] public static void sleep(int nSecond) "=T&SY { dRnf try{ n P]!{J] Thread.sleep(nSecond); _lFw1pa#\ } l
$"hhI8 catch(Exception e) $2?j2}M { fe,6YXUf e.printStackTrace (); mbGma } kFV, Fg } . R/y`:1:W j)6p>6 //日志 yxo=eSOM public static void log(String sMsg) ,^97Ks
; { 0FgF, System.err.println(sMsg); ;%B9mM#p~ } 6/Xs}[iJ ,3y9yJQa*# Z>Mv$F"p: public static void log(int sMsg) 2R.LLE { _Uq' N0U System.err.println(sMsg); <.B+&3') } }$4z$& } v|o{AL:ei ~~Ezt*lH yi>AogQ, /* .
yg# **TestMethod.java Cl]?qH*: */ @XV&^l- package NetFox; '.(Gg%*\. o1x1SH b' y*\9Ru public class TestMethod { q1( [mHZ n]ba1t8ZA '=n?^EPE3 public TestMethod() 4^F%bXJ) { ///xx/weblogic60b2_win.exe N+rU|iMa. try{ '#Au~5 SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); =I@t%Y //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); ]f0'YLG SiteFileFetch fileFetch = new SiteFileFetch(bean); .Dr!\.hL fileFetch.start(); c{BAQZVc } wG3b{0 catch(Exception e){e.printStackTrace ();} =abcLrf2G ?<TJ}("/ 89g
a+#7 } JfIXv MK=oGzK 0lg$zi x( public static void main(String[] args)
H.@$#D { 2Jd(@DcJ2C new TestMethod(); u ;-&r'J> } +*]$PVAFA } iM)K:L7d 点击下载更多相关资料
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