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/* dfj\RIV8 **SiteFileFetch.java gQWd&)'muf */ 2(YPz|~W package NetFox; JcO08n import java.io.*; |1=
!;.# import java.net.*; mryN} kAzd8nJ' 2s ,8R public class SiteFileFetch extends Thread { h rN% w=b(X
q+: 2h^WYpCm SiteInfoBean siteInfoBean = null; //文件信息Bean rJfqA@ long[] nStartPos; //开始位置 /FY2vDfU6 long[] nEndPos; //结束位置 7YIK9edP FileSplitterFetch[] fileSplitterFetch; //子线程对象 I0= NaZ7 long nFileLength; //文件长度 D vkxI<Xa boolean bFirst = true; //是否第一次取文件 8%{q%+ boolean bStop = false; //停止标志 < a rZbM File tmpFile; //文件下载的临时信息 !E\[SjY@J DataOutputStream output; //输出到文件的输出流 eARk
QV TJ@Cj y% //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) x<(b|2qf public SiteFileFetch(SiteInfoBean bean) throws IOException S4NL "m { /M0/-pV9 siteInfoBean = bean; g9h(sLSF //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); yWIm&Q: tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); rx~[Zs+* if(tmpFile.exists ()) F
8yF { qztV,R T bFirst = false; wNCCH55Pt read_nPos(); >R^@Ww;|q } i^Ut015q% else 2h~- { *6ZCDm&N nStartPos = new long[bean.getNSplitter()]; 43:t
\ nEndPos = new long[bean.getNSplitter()]; P<dy3; } jB$SUO`* pR os{Uq" QOFvsJ<s 'w/qcD- } 7G2PMe;$m h#YD~!aJ P!g-X%ngo public void run() Qu*1g(el!o { K\!#4>yd //获得文件长度 }6zbT-i //分割文件 Ibr%d2yS= //实例FileSplitterFetch 1hQN8!: < //启动FileSplitterFetch线程 \|=mD}N //等待子线程返回 NC23Z0y try{ +JdZPb if(bFirst) =C7
khE { #XIc
"L)c nFileLength = getFileSize(); O_,O,1 if(nFileLength == -1) cA`4:gp { 8^ep/ b&| System.err.println("File Length is not known!"); |WqOk~)[Z3 } =jAFgwP\ else if(nFileLength == -2) w_-+o^ { I`B'1"{ System.err.println("File is not access!"); L_O$>c } W.}].7}h else H?rg5TI0 { rs8\)\z for(int i=0;i<nStartPos.length;i++) Csst[3V { HD`>-E# nStartPos = (long)(i*(nFileLength/nStartPos.length)); l[h'6+o } \ {|ImCH for(int i=0;i<nEndPos.length-1;i++) T|4snU2M { Pe7e?79 nEndPos = nStartPos[i+1]; dDcZ!rRaL@ } dbGgD=}o nEndPos[nEndPos.length-1] = nFileLength; L K7Xw3 } ~5aE2w0K } C0C0GqN, I*)VZW :-+4:S //启动子线程 6vs3O
fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; v|t{1[C for(int i=0;i<nStartPos.length;i++) rzLd"` { zQ)+/e(8 fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(),
'ig, ATY siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), 649 != nStartPos,nEndPos,i); [Eq<":) Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); W
Ox_y, fileSplitterFetch.start(); QTJu7^O9 } /p`&;/V| // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), Epjff@7A siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); F9o6V|v // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", ~9M!)\~ nEndPos = " + nFileLength); {[#(w75R{ // fileSplitterFetch[nPos.length-1].start(); ]#eh&jw nYw\'c
P'[<AZ //等待子线程结束 yY=<'{! //int count = 0; MWwJzVL8 //是否结束while循环 D guB boolean breakWhile = false; ';YgG<u s;.=5wcvi? !C&%T] while(!bStop) BW K IbG { $[CA&Y. write_nPos(); =Viy^ieN$ Utility.sleep(500); `lCuU~~ag breakWhile = true; k=n
"+ KCqqJ}G >M4"|W U_ for(int i=0;i<nStartPos.length;i++) %$X\" { iD_TP if(!fileSplitterFetch.bDownOver) ?Myh7 { v|@1( breakWhile = false; *8A6Q9YT break; %v=!'?VT } 78Y@OL_$ } gY5l.& if(breakWhile) /6tcSg) break; x-Z^Q C VWa|Y@Dc] oXal //count++; __\P`S_ //if(count>4) v*TeTA
% // siteStop(); zy)i1d } VTw/_Hf2p 'D6
bmz sBjXE>_#) System.err.println("文件下载结束!"); `BT^a
=5 } I'_v{k5ZI catch(Exception e){e.printStackTrace ();} zixEMi[8 } Q"}s>]k3_ Bymny>.M Q1V2pP+=@ //获得文件长度 /tC9G@Hl public long getFileSize() /bcY6b=: { [b1hC ~I; int nFileLength = -1; PrnrXl
S try{ /H&aMk}J@y URL url = new URL(siteInfoBean.getSSiteURL()); #5{sglC"|F HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); #93}E
Y httpConnection.setRequestProperty("User-Agent","NetFox"); )Vk:YL++ <94WZ?{p fM":f|
G int responseCode=httpConnection.getResponseCode(); {nRUH*(d9 if(responseCode>=400) ^, wnp@ { %V_eJC""? processErrorCode(responseCode); wRbw return -2; //-2 represent access is error Gpu_=9vzv } Czu1 )y OmNn,PCl8 qZsnd7o{l. String sHeader; EA yukM2 #s^s_8#&e SCq3Ds^ for(int i=1;;i++) NsmVd dj { lU$X4JBzS //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); 1v]t!}W:6 //Utility.log(in.readLine()); uBRw>"c_*8 sHeader=httpConnection.getHeaderFieldKey(i); Q\WXi if(sHeader!=null) ~d+O/:=K_ { %!wq:~B1 if(sHeader.equals("Content-Length")) $rB!Ex{@ac { PP4d?+;V nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); ?*o;o?5s^ break; Fwv\ pJ}$ } yA}nPXrd } g RU-g else G5umeqYC break; 1.dX)^\ } ,v_B)a_E } iiN?\OO^~ catch(IOException e){e.printStackTrace ();} gvr]]}h:O catch(Exception e){e.printStackTrace ();} sD2Qm *-7fa0< Nuq(4Yf1W Utility.log(nFileLength); *h])mqhB ">,K1:(D Xj;2h{#s return nFileLength; `skH-lk, } VO|u8Z" J~'~[,K
2%]t3\XW //保存下载信息(文件指针位置) 8J^d7uC private void write_nPos() GZ,j?@ { X&,N}9>B try{ Q'C4pn@ output = new DataOutputStream(new FileOutputStream(tmpFile)); !p"Kd ~ output.writeInt(nStartPos.length); 8xgc[# for(int i=0;i<nStartPos.length;i++) ku-cn2M/ { 8E=vR 8 // output.writeLong(nPos); C\/b~HU output.writeLong(fileSplitterFetch.nStartPos); QU%N*bFW%P output.writeLong(fileSplitterFetch.nEndPos); 9JXhHAxD } *NF&Y output.close(); %0 qc@4 } ^@Y9!G= catch(IOException e){e.printStackTrace ();} 9<w=),R`8 catch(Exception e){e.printStackTrace ();} rNxG0^k( } i
_8zjj7 "d:.*2Z2 DbQBVy //读取保存的下载信息(文件指针位置) Sn0Xl3yr
private void read_nPos() e00RT1L { k|fh\F+$ try{ nE^wxtY DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); Ho>p ^p int nCount = input.readInt(); [e1\A&T nStartPos = new long[nCount]; pj j}K nEndPos = new long[nCount]; '%:5axg?] for(int i=0;i<nStartPos.length;i++) WEps.]s { ^Jn|*?+l nStartPos = input.readLong(); 4fD`M(wv nEndPos = input.readLong(); <w;D$l}u } Ag<4r input.close(); ?'T"?b< } uH=Gt^_ catch(IOException e){e.printStackTrace ();} H]U"+52h catch(Exception e){e.printStackTrace ();} rrbZ+*U } 2,+@#q 0NVG"-Q 1RURZoL private void processErrorCode(int nErrorCode) q~mcjbLz { ~;TV74~rr System.err.println("Error Code : " + nErrorCode); ]}5`7 } FV`3,NFk FU^Y{sbDg |%n|[LP' //停止文件下载 Qz'O{f public void siteStop() |_!PD$i- { Lax9
"xI bStop = true; #3YdjU3w for(int i=0;i<nStartPos.length;i++) |WQD=J%~( fileSplitterFetch.splitterStop(); pn+D@x#IA fQ^h{n Ua}g } 9tW3!O^_ } 1a \=0=[ //负责部分文件的抓取 Pxap;;\ **FileSplitterFetch.java w6%l8+{R */ gX/|aG$a!U package NetFox; qdKh6{ 4U_rB9K$ ~_(!}V import java.io.*; bBd *}"v^" import java.net.*; Q,ZkeWQ7% rD_Ss.\^g D
"JMSL4r public class FileSplitterFetch extends Thread { Z?5,cI[6# 77)OW$G ^!N;F" String sURL; //File URL y[TaM9< long nStartPos; //File Snippet Start Position ER0TY, long nEndPos; //File Snippet End Position N;%j#(v
j int nThreadID; //Thread's ID ,q{lYX83S boolean bDownOver = false; //Downing is over BF@m)w.v boolean bStop = false; //Stop identical #1gTpb+t FileAccessI fileAccessI = null; //File Access interface 1t!&xvhG ch%Q'DR_I) 8f5%xY$ public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException 0]f?Dx/8 { \UVT_=Y this.sURL = sURL; vbW\~xf this.nStartPos = nStart; :==UDVP this.nEndPos = nEnd; GA({r i nThreadID = id; J$o[$G_Z fileAccessI = new FileAccessI(sName,nStartPos);//定位 ,:\zXESy4 } 37GHt9l cj,&&3sbV }s8*QfK> public void run() Z3&XTsq { aTmX!! while(nStartPos < nEndPos && !bStop) ?)i6:76( { BN bb&] 1KfJl S+ P2<gHJ9t try{ D|
3AjzW URL url = new URL(sURL); p1[WGeV HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); \J#I}-a&j httpConnection.setRequestProperty("User-Agent","NetFox"); :Map,]]B_ String sProperty = "bytes="+nStartPos+"-"; 0ll,V httpConnection.setRequestProperty("RANGE",sProperty); + xkMW%e< Utility.log(sProperty); G5C#i7cpm 74</6T]^ ]}*G[[
^p InputStream input = httpConnection.getInputStream(); ^ ^U)WB //logResponseHead(httpConnection); @5uyUSt] ;1Tpzm mo97GW byte[] b = new byte[1024]; *;~{_Disz int nRead;
*{L<BB^ while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) (]GY.(F{ { m"ki*9] nStartPos += fileAccessI.write(b,0,nRead); vwSX$OZ //if(nThreadID == 1) c{r6a=C // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); {ILQ
CvP* } Xqq?S l-JKcsM V3.vE, Utility.log("Thread " + nThreadID + " is over!"); dRarNW bDownOver = true; M\x7=*\ //nPos = fileAccessI.write (b,0,nRead); P-*RN
} *AJezhR catch(Exception e){e.printStackTrace ();} 3n=cw2FG } ~=aI2(b } )@};lmPR &vGEz*F NC#kI3 { //打印回应的头信息 %QlBFl0a public void logResponseHead(HttpURLConnection con) ff2.|20 { omDi<- for(int i=1;;i++) 3]5&&=# { d%"@#bB String header=con.getHeaderFieldKey(i); m/"=5*pA if(header!=null) :D)&>{? //responseHeaders.put(header,httpConnection.getHeaderField(header)); ocuNrkZ Utility.log(header+" : "+con.getHeaderField(header)); }G0.Lq+a else `dq3= break; 4h0jX9 } M@z_Z+q9 } ps4Wwk( ]((
>i%%~ ^5iY/t~Q public void splitterStop() Aghj) V { T[2f6[#[_ bStop = true; d}A2I } |'>E};D t,as{.H{h L@x8hUG" } :j5 0]zLy{ Z~.]ZWj- DG%%] /* pOe` *2[ **FileAccess.java E* DVQ3~ *//文件访问(定位,写) z]R!l%` package NetFox; 6d?2{_} , import java.io.*; M#gGD- @R Yb-d 26klW:2* public class FileAccessI implements Serializable{ u\& [@v %BP)m(S7 //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 eDMwY$J
RandomAccessFile oSavedFile; 28L'7 long nPos; 7ump:| "u>sS 8=_| qy}l/ public FileAccessI() throws IOException kl<B*:RqH { >[3,qP]E this("",0); lPSDY&`P } GeW$lA I fbbl92p -W"0,.Dvg public FileAccessI(String sName,long nPos) throws IOException V<R+A* gY: { X QoT},C oSavedFile = new RandomAccessFile(sName,"rw"); .j$bCKXGx this.nPos = nPos; d+| !6 oSavedFile.seek(nPos); SbNU X } )|1JcnNSa x@RA1&c {~{s =c0 public synchronized int write(byte[] b,int nStart,int nLen) +53zI|I { K*i1! "w int n = -1; r H_:7#.E try{ |~vQ0D
oSavedFile.write(b,nStart,nLen); HC`3AQ12!& n = nLen; \EfwS%
P } Oh85*3 catch(IOException e) zbKW.u]v { VX@G}3Ck e.printStackTrace (); "+JwS } h+d;`7Z> \36;csu 7%x+7 return n; uM6!RR!~ } V# %spW Xr6 !b:UX av$_hEjo|D } SX<mj Y>m=cqR 8 =Lv7G% /* sN) .Jo **SiteInfoBean.java ;GEu.PdxB */ y!D`.' package NetFox; s7.*o@G 5K-)X9z? wef^o"aP public class SiteInfoBean { `ha:Gf RL)3k8pk 32FGDM private String sSiteURL; //Site's URL s;M*5|- private String sFilePath; //Saved File's Path %4KJ&R
(>[ private String sFileName; //Saved File's Name Oydmq,sVe( private int nSplitter; //Count of Splited Downloading File +B|X
k[ [$Bb'],k ?i=!UN public SiteInfoBean() lH>XIEj {//nSplitter的缺省值为5 N9|.D.#MF //default value of nSplitter is 5 w[G_ w:$a this("","","",5); W)~.o/; } `v{X@ x * c
c+Fd N6 8>` public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) v fDb9QP { { xoo9jq- sSiteURL= sURL; j7+t@DqQ sFilePath = sPath; bD-Em#> sFileName = sName; ?0%TE\I8 this.nSplitter = nSpiltter; -{%''(G Y6PA\7Y\ sZDJ+ } i?=.;
0[| PCfs6.*5Mf 5z>\'a1U public String getSSiteURL() {f3fc8(p { l!` 0I] } return sSiteURL; EC&,0i4n: } =Q/>g6 6|Q'\ -;-"i J0 public void setSSiteURL(String value) "-:\-sMt{ { ljON_* sSiteURL = value; ='>UKy[= } BF!zfX?n N+75wtLy& NyLnE public String getSFilePath() ,?/<fxIY { ybO,~TQ return sFilePath; 2f4c;YS }
RZ%X1$ &2igX?60 LTct0Gh public void setSFilePath(String value) W10fjMC}^ { 1z:N$O_v sFilePath = value; Zx 1z
hc } b15qy? `y .Tv(1HAc2l i8.[d5 public String getSFileName() b{Ss+F { H-w|JH>g return sFileName; vDvGT<d } V/e_:xECC AgJ~6tK V+z)B+ public void setSFileName(String value) %Ege^4PE { |hoZ: sFileName = value; `1]9(xwhQ0 } V}-o):dI| -~f.>@Wb Ghc0{M< public int getNSplitter()
q+~CA[H5K { zmRK%a( return nSplitter; 3PffQ,c[~ } p\S3A( hh&y2#Io {[*_HAy7 public void setNSplitter(int nCount) zK?[dO { ^i\1c-/ nSplitter = nCount; v1)6")8o+ } {E|gV9g } ~#\#!H7 Sw'?$j^3 F2'cL @E3 /* ?F{xDfqw **Utility.java 2zu~#qU[)M */ KW^aARJ) package NetFox; IIiN1
Lu,5 B$EP'5@b |0p'p$% public class Utility { &y\2:IyA ku8c) V"iLeC public Utility() q(^J7M) { f@L{*Upj+ 7+4"+CA c\MDOD%9 } V}+;bbUc- ]i2\2MTW8 //线程睡眠
5AU3s public static void sleep(int nSecond) vW3Zu B { %$| k3[4V try{ %QLYNuG Thread.sleep(nSecond); [zEP| } a=VT|CX[ catch(Exception e) %nF\tVP3] { *!@x<Hf< e.printStackTrace (); z-gG( } #SNI
dc>9\ } ;tiUOixJ r0
C6Ww7u //日志 *?Ef}:] public static void log(String sMsg)
RQNi&zX/ { 5N<v'6&= System.err.println(sMsg); olh3 R.M< } ][#*h`I tdF[2@?+ KBA% public static void log(int sMsg) ' PYqp&gJ { I.1l System.err.println(sMsg); KdsvZim0> } 5>Yd\(`K } FH`&C*/F0Y
7#qL9+G Hd`p_?3] /* ?^4sE-C6 **TestMethod.java [:@?,?V\N */ pY#EXZ# package NetFox; 2_b'mepV =2)t1 H vaJXX public class TestMethod { )0MshgM TFDCo_>o g@VndAp public TestMethod() x]cZm^ { ///xx/weblogic60b2_win.exe 5?0gC&WfN try{ [iy;}5XK SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); 4 xzJql //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); lILtxVBO2o SiteFileFetch fileFetch = new SiteFileFetch(bean); lNVAKwW2# fileFetch.start(); x`vs-Y:P } ]pTw]SK catch(Exception e){e.printStackTrace ();} U*"cf>dB( zb}+ m#q C-^%g[# } (H%d] 4@iJ|l G2{ M#H public static void main(String[] args) |
8Egw-f { 15o
*r new TestMethod(); `G0rF\[ } &dDI*v+ } "`*a)'.'^c 点击下载更多相关资料
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