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/* Y6v{eWtSn **SiteFileFetch.java "r&,#$6W6 */ Cq2Wpu-u package NetFox; ,s~l; Gkj import java.io.*; 5?-HQoT)G import java.net.*; "io O_ wD9K\%jIr! N_c44[z1 public class SiteFileFetch extends Thread { M1kA- Xr {]Zan'{PCO j?2~6W/[ SiteInfoBean siteInfoBean = null; //文件信息Bean ({!!b"B2 long[] nStartPos; //开始位置 ""-wM~^D long[] nEndPos; //结束位置 }YDi/b7 FileSplitterFetch[] fileSplitterFetch; //子线程对象 i|^Q{3?o# long nFileLength; //文件长度 .C^P6S2oJ boolean bFirst = true; //是否第一次取文件 huC{SzXM boolean bStop = false; //停止标志 +Ryj82;59z File tmpFile; //文件下载的临时信息 G WIsT\J DataOutputStream output; //输出到文件的输出流 ;b {#$#`= zq};{~u( //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) rwq public SiteFileFetch(SiteInfoBean bean) throws IOException eS8(HI6{^ { 59Pc:Gg; siteInfoBean = bean; c<$<n //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); bB_LL tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); J p=qPG| if(tmpFile.exists ()) z0 9Gp}^; { oV%:XuywT bFirst = false; eI1zRoIl- read_nPos(); A%8
Q}s$<s } +KTfGwKt else 7%^G]AFi { JH.XZM& nStartPos = new long[bean.getNSplitter()]; P)Adb~r nEndPos = new long[bean.getNSplitter()]; h[remR#3\ } PF~@@j kk=n&M ZsP ^< C7%R2>}?f } tRoSq;VrS At.&$ t mo| D public void run() 5T;LWS { ahl|N` //获得文件长度 J>_mDcPo //分割文件 `yfZ{< //实例FileSplitterFetch 0nwi5 //启动FileSplitterFetch线程 <j'K7We/tP //等待子线程返回 rbd0`J9fq try{ Dd?G4xUG if(bFirst) agUdI_'~@9 { ^)dsi nFileLength = getFileSize(); CPJ<A,V if(nFileLength == -1) doanTF4Da { |=}+%>y_ System.err.println("File Length is not known!"); bgzd($)u } y<Koc>8 else if(nFileLength == -2) KtQs uL% { IO\1nB$0nb System.err.println("File is not access!"); N'2?Z b } "^4*,41U else #z(:n5$F { %],BgLhS. for(int i=0;i<nStartPos.length;i++) )O[8 D { ?IGp?R^j" nStartPos = (long)(i*(nFileLength/nStartPos.length)); x@
=p } >fC&bab for(int i=0;i<nEndPos.length-1;i++) lD0p=`. { NN4Z:6W5 nEndPos = nStartPos[i+1]; P#A,(Bke3 } !4p{b f nEndPos[nEndPos.length-1] = nFileLength; Kki(A4;7F } JT
7WZc) } l+Wux$6U $J6
.0O pz^S3fy //启动子线程 /4r2B.91O fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; {vD$od i for(int i=0;i<nStartPos.length;i++) }_lG2#Ll5 { q2%cLbI
F fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), {-5)nS^_ siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), :I#.d7`uk nStartPos,nEndPos,i); eCI'<^ Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); t!\aDkxo % fileSplitterFetch.start(); w[z=x } :%gc Sm // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), EE'2<"M siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); #4AU&UM+i // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", q[Ai^79 nEndPos = " + nFileLength); aqSOC(jU // fileSplitterFetch[nPos.length-1].start(); oRbWqN`F. nFni1cCD &eV5#Ph //等待子线程结束 ["nWIs[h //int count = 0; U4d7-&U //是否结束while循环 dC6>&@
VX boolean breakWhile = false; I!/EQO| %E%=Za .w4|$.H while(!bStop) z_'^=9m { Qy:yz write_nPos(); s4Ja y!A Utility.sleep(500); +Ug & breakWhile = true; x;[)#>.' :3M,]W] |co#X8J for(int i=0;i<nStartPos.length;i++) %/2
` u { `*U@d%a if(!fileSplitterFetch.bDownOver) e,OXn gC { r8(oTx breakWhile = false; 3Y P! B= break; C6gSj1 } 6O/ L~Z*t } ~;(\a@ _ if(breakWhile) cEHpa%_5 break; IEm?'o: u/W{JPlL R V#w0 r //count++; 7b1
yF,N //if(count>4) Hl$qmq // siteStop(); Q^{TcL8 } g(P7CX+y /,I?"&FWc u4lM>(3Y} System.err.println("文件下载结束!"); ^fKKsfIf } .yF-<Y catch(Exception e){e.printStackTrace ();} n*GB`I*g } MO~T_6 ywm"{ U?8 7UBW3{d/u5 //获得文件长度 -F`gRAr- public long getFileSize() .x$V~t { E`N` int nFileLength = -1; k8E2?kbF try{ uhq6dhhR URL url = new URL(siteInfoBean.getSSiteURL()); 9ZOQNN<ex HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); _
(b4|hJ' httpConnection.setRequestProperty("User-Agent","NetFox"); Wda?$3!^q -AnJLFY _Nh])p- int responseCode=httpConnection.getResponseCode(); oxFd@WV5 if(responseCode>=400) 70avr)OM { J*g<]P&p0 processErrorCode(responseCode); 6 w!qZ4$ return -2; //-2 represent access is error ="T}mc } i.9}bw
9u@ ';eAaDM .dzw5R& String sHeader; T>|+cg nILUo2e~ 6+sz4 for(int i=1;;i++) |vi=h2* { v2|zIZ //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); }!g$k
$y //Utility.log(in.readLine()); 4-O.i\1q sHeader=httpConnection.getHeaderFieldKey(i); VIWH~UR)&! if(sHeader!=null) mmFcch$Jv { )cN=/i if(sHeader.equals("Content-Length")) 1
=?pL$+G { ;Qd'G7+ nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); H"+|n2E^ break;
H|s Iw: } W*H %\Y:N } j.Y!E<e4] else =[4C[s break; z@[n?t!7k } lS;S:-
-F } \U]<HEc^ catch(IOException e){e.printStackTrace ();} [HXd|,~_j- catch(Exception e){e.printStackTrace ();} -{3^~vW|< $LR~c)}1I ;|rFP Utility.log(nFileLength); s/?(G L+Ae x =JZ"|TE aS3-A4 return nFileLength; 1b=\l/2 } }8.$)&O$^ L-W*h _58&^:/^ //保存下载信息(文件指针位置) w#(E+s~} private void write_nPos() >taT
V_, { R{4[. try{ v]drDVJ
output = new DataOutputStream(new FileOutputStream(tmpFile)); yaj1nq!*" output.writeInt(nStartPos.length); w2"]%WS % for(int i=0;i<nStartPos.length;i++) 7<Ut/1$MI { |b
Z
58{} // output.writeLong(nPos); H_JT"~_2 output.writeLong(fileSplitterFetch.nStartPos); }L Brk0] output.writeLong(fileSplitterFetch.nEndPos); UL8"{-`_\ } ue
*mTMN output.close(); qB3&F pgW } ({rescQB catch(IOException e){e.printStackTrace ();} TAM`i3{ D catch(Exception e){e.printStackTrace ();} 0J )VEMC } P`hg*"<V $I@. <J* x@@k_'~t% //读取保存的下载信息(文件指针位置) wW/wvC- private void read_nPos() D>#Jh>4 { RV5;EM)~[ try{ $<wU>X DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); K0^+2lx int nCount = input.readInt(); %]DJ-7 xE nStartPos = new long[nCount]; UJX5}36 nEndPos = new long[nCount]; tIX|oWC$q for(int i=0;i<nStartPos.length;i++) Wm58[;%LTw { 9hwn,=Vh) nStartPos = input.readLong(); 9NC6q-2 nEndPos = input.readLong(); !ImtnU} } G_p13{"IM input.close(); e3&.RrA } ZONe}tv: catch(IOException e){e.printStackTrace ();} VN4H+9E catch(Exception e){e.printStackTrace ();} +>h'^/rAE } vw
q Y;7 5|[\Se# nG5:H.) private void processErrorCode(int nErrorCode) Se5jxV { 1lUY27MF System.err.println("Error Code : " + nErrorCode); "6'# L, } U}`HN*Q.q DOo34l6# F[|aDj@q e //停止文件下载 |w^nCsv public void siteStop() 0wl31k{ { r+l3J>:K bStop = true; } SA/,4/9 for(int i=0;i<nStartPos.length;i++) 0j~C6vp fileSplitterFetch.splitterStop(); +Y^/0=6h R75np^ Yg7C"3;Vt } XAr YmO } r`'n3#O* //负责部分文件的抓取 2:S
4M.j **FileSplitterFetch.java z+@Jx~<i */ ~|)'vK8W package NetFox; 93N:?B9 szb],)|18 ~4tu*\P import java.io.*; j.rJfbE|X import java.net.*; #$>m`r F0 FF:>< )![?JXf public class FileSplitterFetch extends Thread { ('p~h-9Vi ,NaNih1 aTY\mKk String sURL; //File URL ?g'? Ou long nStartPos; //File Snippet Start Position *e05{C:kS long nEndPos; //File Snippet End Position "(d7:!% int nThreadID; //Thread's ID Go_~8w0< boolean bDownOver = false; //Downing is over )Wm:Ilq boolean bStop = false; //Stop identical DbkKmv& FileAccessI fileAccessI = null; //File Access interface pEE.%U 2V#(1Hc! .),m7"u| public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException {o[*S%Z" { D@>^_cTO24 this.sURL = sURL; `=3:*.T* this.nStartPos = nStart; h=~TgTv this.nEndPos = nEnd; 7fJWb)z!k nThreadID = id; 1e#}+i!a fileAccessI = new FileAccessI(sName,nStartPos);//定位 $McVK>= } Hi<5jl "M.vu}~> cA4xx^~ public void run() 7].FdjT. { W`-AN}C# while(nStartPos < nEndPos && !bStop) }A%Sx!7~ { *G#W],~0 ~O}LAzGb /uzU]3KF~ try{ V}kZowWD URL url = new URL(sURL); G? "6[w/p HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); 0xM\+R~, httpConnection.setRequestProperty("User-Agent","NetFox"); 0"L_0 t: String sProperty = "bytes="+nStartPos+"-"; #}W^d^-5t5 httpConnection.setRequestProperty("RANGE",sProperty); =X11x)]F9 Utility.log(sProperty); RscU=oaKi 0)'^vJe <k&Q"X:" InputStream input = httpConnection.getInputStream(); }Z_w8+BZ //logResponseHead(httpConnection); N?h=Zl| 1^zpO~@S Vn6 g(:\w byte[] b = new byte[1024]; b}9Ry" int nRead; m. G}#/ while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) 1/YWDxo, { bi bjFg nStartPos += fileAccessI.write(b,0,nRead); -q BrJ1* //if(nThreadID == 1) Vx^+Z,y&QP // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); E8~Bp-G) } !$x9 s'D 39QAj& C0X_t Utility.log("Thread " + nThreadID + " is over!"); 8rXu^ bDownOver = true; A-&C.g //nPos = fileAccessI.write (b,0,nRead); ~ b;%J: } r-+ .Ax4L" catch(Exception e){e.printStackTrace ();} z17x%jXy } ^[SQw)* } MGd 7Ont &C+pen)Z nxP>IfSA //打印回应的头信息 9air"4 public void logResponseHead(HttpURLConnection con) hSq3LoHV { sV+/JDl for(int i=1;;i++) :Uf\r
`a9 { \4`~J@5Y String header=con.getHeaderFieldKey(i); u+GtH;<; if(header!=null) >v9 (" //responseHeaders.put(header,httpConnection.getHeaderField(header)); k"V| f& Utility.log(header+" : "+con.getHeaderField(header)); bBBW7',[a else #]'#\d#i break; %B$~yx3# } A7|!&fi } wvum7K{tI
`k/hC YT6<1-E# public void splitterStop() `Pv[A { R g7 O bStop = true; s('<ms } cWSiJr):r ]VY}VALZ : uglv6 } Rdd[b? y-gSal Re**)3#gn /* b/='M`D}#G **FileAccess.java "k(Ee *//文件访问(定位,写) n5X0Gi9 package NetFox; "MD import java.io.*; %Uj7g> -ckk2D? Bkvh]k;F8 public class FileAccessI implements Serializable{ /pZ]:.A ,lLkAd?q //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 4i>sOP3
B RandomAccessFile oSavedFile; K'EGm #I long nPos; )2KQZMtgm] Z> jk\[ y-qbK0=X4 public FileAccessI() throws IOException !fXw X3B { *P,dR]-m this("",0); pZx'%-\-T } u/3 4E= 3>Ts7
wM sBGYgBu!a public FileAccessI(String sName,long nPos) throws IOException Ly1V@ { oqa]iBO oSavedFile = new RandomAccessFile(sName,"rw"); sf\p>gb this.nPos = nPos; 47b=>D8 oSavedFile.seek(nPos); g/&`NlD } 8y5iT?.~vy 3VZeUOxY\W s*.CJ public synchronized int write(byte[] b,int nStart,int nLen) XS5*=hv: { vs-%J6}G int n = -1; =l?F_ try{ N6Mo| oSavedFile.write(b,nStart,nLen); :uE:mY%R n = nLen; ^W|B Xxo } 1@*qz\ YY catch(IOException e) @Omgk=6 { ;v0M
:: e.printStackTrace (); aV?dy4o$ } zyyt` $Cw>
z^}u !e?g"5r{Bv return n; dGf:0xE" } n4Od4&r E^z\b * E_-3G<rt } >h+[#3vD K]4XD1n7 ns|)VX /* )&R^J;W$M1 **SiteInfoBean.java CPssk,q~C */ }!=}g|z#| package NetFox; qP6Yn JWl q 65mR!) "L'0" public class SiteInfoBean { ,f
..46G /,v>w, wg<UCmfu! private String sSiteURL; //Site's URL %$K2$dq5 private String sFilePath; //Saved File's Path
"LyMw){ private String sFileName; //Saved File's Name #-b0U[,. private int nSplitter; //Count of Splited Downloading File g.![>?2$8 <BoDLvW> Y)*5M public SiteInfoBean() W`HO Q {//nSplitter的缺省值为5 oG5:]/F //default value of nSplitter is 5 q3a`Y)aVB this("","","",5); tHlKo0S$0 } 4 [2^#t[ R%)ZhG*
$2u^z=`b!% public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) tmM8YN| { thWQU"z4 sSiteURL= sURL; Hgs=qH sFilePath = sPath; ~Q7)6% sFileName = sName; u2=gG. this.nSplitter = nSpiltter; >iefEv\ 1T(:bM_t`7 Wez"E2J` } ?M'_L']N[ x2gnB@t t Dx!m~[ public String getSSiteURL() 6")co9 { q:A{@kFq_ return sSiteURL; a%f?OsY } 'Oyx
X Y{yN*9a79 =Kdd+g! public void setSSiteURL(String value) Z]-C,8MM { pAwmQS\W sSiteURL = value; C1
qyjlR } a&yIH;- fJ"#c<n -oGJPl {r public String getSFilePath() +[l52p@a { TE+d? return sFilePath; UO%VuC5B } dxm_AUM 1QHCX*_ }2qmL$ public void setSFilePath(String value) V'vDXzk\ { B/#tR^R sFilePath = value; ofeSGx } iO^z7Y7 &%YFO'>>} 4}nsW}jCc public String getSFileName() jn+NX)9 { /0 |niiI return sFileName; E8]PV,#xY } 2q2;Uo`"S. x!rHkuH~ { bjK(| public void setSFileName(String value) C:C9swik"5 { @)0-oa,u+ sFileName = value; 6*@\Qsp615 } "52nT mG,%f"b0 &=SP"@D public int getNSplitter() -OLXR c= { 5 fGUJ[F= return nSplitter; \VW&z:/*pZ } .:eNL]2%: ]V9z)uz .BLF7>
M1 public void setNSplitter(int nCount) fneg[K { :v/6k nSplitter = nCount; \<ohe w } (`0dO8 } @d5G\1(% z?~W]PWiZ i*16kdI. /* 6`LC(Nv%-n **Utility.java C9oF*{ */ |JVeW[C package NetFox; u*R9x3&/5 pa0'\ F +e
J9 public class Utility { o!Vs{RRu} yK"OZ2Mv ~;/\l=Xl public Utility() ypxqW8Xe { ,z}wR::% o6e6Jw Q>gU( } B"O5P> FrSeR9b //线程睡眠 [ e4)"A" public static void sleep(int nSecond) !x9j~D'C` { 9g"
1WZ! try{ &dSw[C#f Thread.sleep(nSecond); {},rbQ
- } zdA:K25" catch(Exception e) =l`xXma { 1XZ|}Xz e.printStackTrace (); ]Y[8|HJ8 } v2<roG6.V } ^
K8JE, _`!@ //日志 Y=3:Q%X public static void log(String sMsg) "4FL<6 { I>b-w;cC System.err.println(sMsg);
hA`>SkO } fTi,S)F' Xq&x<td zE VJ public static void log(int sMsg) 8uME6]m
i { sV7dgvVd System.err.println(sMsg); lj"L Q(^ } P=&J e? } *VT@ }I7/FqrD ;??wLNdf- /* Mj$dDtw **TestMethod.java WNTm */ vx=I3o package NetFox; n5_r
3{ '3uj6Wq2 ~B%EvG7:n public class TestMethod { N}\Da:_ !l'Az3'J| F2yM2Ldx public TestMethod() >Uvtsj# { ///xx/weblogic60b2_win.exe ,eRl
Z3T try{ :=04_5 z SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); RIX0AE //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); iUh_rX9A" SiteFileFetch fileFetch = new SiteFileFetch(bean); Ms?V1 fileFetch.start(); &sL5Pt_ } z]>aWH}$ catch(Exception e){e.printStackTrace ();} a34'[R
1W;3pN 3m4?l
~ } K@VXFV -5\aL"?4 xiU-}H'o public static void main(String[] args) a<Pi J? { 9#%(%s2+ new TestMethod(); ~%^af"_ } *Rshzv[ } *MkhRLw\, 点击下载更多相关资料
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