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/* ?ODBW/{[G **SiteFileFetch.java 6h[fk.W_ */ ey>tUmt6? package NetFox; <c(%xh46 import java.io.*; ]xV2=!J import java.net.*; apxq] !
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<3f
F KAT^v bR public class SiteFileFetch extends Thread { Hnvs{KC` o(i?_4E @-1VN;N SiteInfoBean siteInfoBean = null; //文件信息Bean #zn`)n long[] nStartPos; //开始位置 S6yLq|W0 long[] nEndPos; //结束位置 @, z4{B FileSplitterFetch[] fileSplitterFetch; //子线程对象 WR*<| long nFileLength; //文件长度 cR6#$-a boolean bFirst = true; //是否第一次取文件 \S?;5LacZ boolean bStop = false; //停止标志 %yVP@M File tmpFile; //文件下载的临时信息 VRv.H8^{ DataOutputStream output; //输出到文件的输出流 t<p4H^ XPi5E" //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) NQbgk+&wD public SiteFileFetch(SiteInfoBean bean) throws IOException
Es:oXA { EF6"PH+J@ siteInfoBean = bean; mFC9\
//tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); <;Td8T; tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); ,UT :wpc^i if(tmpFile.exists ()) $4CsiZ6 { gln
X C bFirst = false; ^S(["6OJ( read_nPos(); .X4UDZQg } y
0fI7:e3 else nhq,Y0YH { eGrxS;NY nStartPos = new long[bean.getNSplitter()]; Xr|e%]!** nEndPos = new long[bean.getNSplitter()]; h4>q~&Pd } Y-"7R>^I q+67Wc= g.Kyfs4` !xC IvKW } c=:A/z{ PtKrks|y A$J?- public void run() EhIa31>X { WWIQ6EJO //获得文件长度 d[e;Fj! //分割文件 7lQ:}& //实例FileSplitterFetch &,=t2_n //启动FileSplitterFetch线程 G"prq& //等待子线程返回 RjHKFB2 try{ Z9I
?j1K|! if(bFirst) .|J-(J<>[. { >D$NEO^ nFileLength = getFileSize(); ozG!OiRW if(nFileLength == -1) M|'![]- { ==W] 1@s System.err.println("File Length is not known!"); [iG4qI } URxy*) else if(nFileLength == -2) Z7?-c { G c:oSvm System.err.println("File is not access!"); &G!2T!xx } ].*I Z else 9Or { l:"zYcp% for(int i=0;i<nStartPos.length;i++) 5sF?0P;ln { jE, oEt O; nStartPos = (long)(i*(nFileLength/nStartPos.length)); |Z{
DU(?[b } q;qY#wD@ for(int i=0;i<nEndPos.length-1;i++) JiHk`e` { eRwm>l"fVV nEndPos = nStartPos[i+1]; ^Ea^t.c}_ } R)5zHCwOw nEndPos[nEndPos.length-1] = nFileLength; h<f]hJ`ep } U3ao:2zP } gl"1;C ~f!iz~ R`emI7| //启动子线程 DWar3+u&0 fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; 0%hOB: for(int i=0;i<nStartPos.length;i++) !PY.FnZ { vWpkU<&3| fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), A/U, | siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), tv7A&Z)Rh nStartPos,nEndPos,i); 75#&hi/~ Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); j[YO1q* fileSplitterFetch.start(); P<gr=& } %N-f9o8 // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), Mhj.3nN siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); km#Rh^ // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", oSqkAAGz\ nEndPos = " + nFileLength); 79Si^n1\ // fileSplitterFetch[nPos.length-1].start(); K9N\E"6ZP XnI)s^ 9"mcN3x:\e //等待子线程结束 IgU65p //int count = 0; xs3t~o3y //是否结束while循环 _0]{kB.$_ boolean breakWhile = false; :f58JLX M%Dv-D{ qHQ#^jH while(!bStop) =^A/&[&31 { z>./lu\ write_nPos(); +oMe\wYR$r Utility.sleep(500); LTc=D breakWhile = true; XDrNc!XN 4^rO K J$Nc9?|ZZ for(int i=0;i<nStartPos.length;i++) 1K'.QRZMb9 { Oe*+pReSD if(!fileSplitterFetch.bDownOver) 2OJ=Xb1 { Epf[8La breakWhile = false; X$4 5<oz break; aI0}E O } ^(8(z@y } /iekww^54 if(breakWhile) L[FNr& break; c|^#v8x^/ %.*?i9} n9Xs sl0 //count++; Kn<z<>vO //if(count>4) vg/:q>o // siteStop(); @`6db } a\m@I_r.N JQ.w6aE QX j4cg System.err.println("文件下载结束!"); w$5#jJX\ } 3d|n\!1r catch(Exception e){e.printStackTrace ();} - &/n[EE } MHVHEwr.{ SXx2 ")87GQ( R //获得文件长度 ;0f?-W?1 public long getFileSize() 'YcoF;&[C { On{p(|l int nFileLength = -1; (X"WEp^Q{I try{ Gf{FFIe( URL url = new URL(siteInfoBean.getSSiteURL()); g^EkRBU HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); ^KK6 d httpConnection.setRequestProperty("User-Agent","NetFox"); a:(.{z?nM s1eGItx[w g
:me:M int responseCode=httpConnection.getResponseCode(); 5-ju5z?= if(responseCode>=400) c_xo6+:l { 1$g]&' processErrorCode(responseCode); K;wd2/jmJ return -2; //-2 represent access is error ZzuEw } bQ"w%! `/mcjKQ&9y iYJzSVO String sHeader; do:3aP'S, 62X;gb ag$mc8-p[ for(int i=1;;i++) 6(`Bl$M9 { hKtc //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); ~#b&UR //Utility.log(in.readLine()); \*V`w@ sHeader=httpConnection.getHeaderFieldKey(i); Z+< zKn} if(sHeader!=null) k-b0Eogp] { 2vit{ if(sHeader.equals("Content-Length")) PfI~`ke { buRK\C nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); y0R5YCq\": break; 8Jd\2T7 h } tC=`J%Ik } D:gskK+o6M else ,
LP |M: break; *$ihNX]YG } ?{"_9g9 } il \q{Y
o catch(IOException e){e.printStackTrace ();} *k(>Qsb " catch(Exception e){e.printStackTrace ();} >~kSe=Hsb4 dX0"h5v1 X=<-rFW Utility.log(nFileLength); :-=,([TJ vElVw.
P zd+_
BPT return nFileLength; ;MqH)M } cj:!uhZp7 Ed%8| M3 J0e~s //保存下载信息(文件指针位置) RfMrGC^? private void write_nPos() {:VUu?5-t; { l0m\2Ttf try{ $~|#Rz%v output = new DataOutputStream(new FileOutputStream(tmpFile)); :dtX^IT output.writeInt(nStartPos.length); Sn\S`D for(int i=0;i<nStartPos.length;i++) 7B`,q-x. { y~ JCSzpU // output.writeLong(nPos); a_UVb'z output.writeLong(fileSplitterFetch.nStartPos); k:Iz>3O3] output.writeLong(fileSplitterFetch.nEndPos); S0_#h) } BTwLx-p9t output.close(); m8q3Pp } 7[wHNJ7)r catch(IOException e){e.printStackTrace ();} |Go?A/' catch(Exception e){e.printStackTrace ();} qFo'"z`84 } 5V5E,2+
0 ,haCZH{ tH_e?6] //读取保存的下载信息(文件指针位置) X`d d"8% private void read_nPos() |=7ouFl { 2l)J,z
try{ K +oFu% DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); S+Aq0B< int nCount = input.readInt(); 5YlY=J nStartPos = new long[nCount]; DlkHE8r\ nEndPos = new long[nCount]; (GVH#}uB for(int i=0;i<nStartPos.length;i++) =|lKB; { NzmVQ-4 nStartPos = input.readLong(); Fg3VD(D^U nEndPos = input.readLong(); +UxhSFU } l:O6`2Z input.close(); gHLBtl/ } vV.TK_y catch(IOException e){e.printStackTrace ();} [Yx)`e catch(Exception e){e.printStackTrace ();} fI2/v<[ } 0W|}5(C a}Db9 = etX&o5A private void processErrorCode(int nErrorCode) Yq;|Me{h { E\V-<]o System.err.println("Error Code : " + nErrorCode); gWo `i } x~Egax
=v4;t'_^ qW57h8M //停止文件下载 mJ=3faM public void siteStop() pSQ)DqW { <MhjvHg bStop = true; !c`KzqP for(int i=0;i<nStartPos.length;i++) x/NR_~Rnk fileSplitterFetch.splitterStop(); qRg^Bp'VD# <_HK@E<_HO gO*:<B g } v$R+5_@[l } FhZ^/= As //负责部分文件的抓取 i<N[s O **FileSplitterFetch.java _~aFzM */ I$K? ,
package NetFox; &TqY\l H[ 6L! tn-_3C import java.io.*; m_Owe/BC#m import java.net.*; IL?mt2I Q> \#P>k;D
D(}w$hi8 public class FileSplitterFetch extends Thread { Y<U"}} ew(CfW2 ~{,U%B String sURL; //File URL |wASeZMO2 long nStartPos; //File Snippet Start Position ;P9P2&c8c long nEndPos; //File Snippet End Position h)[{{JSf int nThreadID; //Thread's ID =yv_i]9AN boolean bDownOver = false; //Downing is over s? /#8 ` boolean bStop = false; //Stop identical =H T:p:S FileAccessI fileAccessI = null; //File Access interface Ys@M1o ecK{+Z'G bI)ItC_wf! public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException LRO'o{4$E { Y6T1_XG this.sURL = sURL; 9$&+0 this.nStartPos = nStart; ]UG+<V
,: this.nEndPos = nEnd; ~7$E\w6 nThreadID = id; u<x2"0f fileAccessI = new FileAccessI(sName,nStartPos);//定位 jseyT#2 } c+PT"/3 D8a[zXWnc VeixwGZ. public void run() Z^i=51 { HC0q_%j while(nStartPos < nEndPos && !bStop) z -|gw.y { &6fNPD(| _E eH \u@4eBAV try{ [(v?Z`cX\ URL url = new URL(sURL); %2Q:+6) HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); =;DmD?nZ httpConnection.setRequestProperty("User-Agent","NetFox"); Le3H!9lbc String sProperty = "bytes="+nStartPos+"-"; ,i>u>YNZ httpConnection.setRequestProperty("RANGE",sProperty); 9"Vch;U$ Utility.log(sProperty); O9OD[VZk DSG tt/n WAPN,WuW InputStream input = httpConnection.getInputStream(); :.kc1_veYS //logResponseHead(httpConnection); (_G&S~@. [+0rlmB Va^Y3/ byte[] b = new byte[1024]; Z;kRQ int nRead; )1Rn;(j9Re while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) QC7Ceeh]4 { xU$A/!oK nStartPos += fileAccessI.write(b,0,nRead); Wbo{v r[2+ //if(nThreadID == 1) ySP1,xq // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); rU?sUm,ch } / fBi9=}+ q{v:T}Q|A D=}UKd Utility.log("Thread " + nThreadID + " is over!"); q)%F#g bDownOver = true; "Y(stRa //nPos = fileAccessI.write (b,0,nRead); lz>YjK: } A/n-.ci catch(Exception e){e.printStackTrace ();} C
Z8Fe$F } ?E1<>4S8 } P" +!mSe^~ &u5OL?> pME17 af //打印回应的头信息 j8p</gd public void logResponseHead(HttpURLConnection con) ,ra!O=d~0 { Sa5+_TW for(int i=1;;i++) -dXlGOD+C { ? b;_T,S[ String header=con.getHeaderFieldKey(i); (_S`9Z8= if(header!=null) 6&~8TH //responseHeaders.put(header,httpConnection.getHeaderField(header)); qEvHrsw}, Utility.log(header+" : "+con.getHeaderField(header)); \lj.vzD-A else r*#ApM"L break; .!uXhF' } *_G(*yAe( } @Qw~z0PE<l ^(<Ecdz( e~#;ux public void splitterStop() -#0(Jm' { @c&}\#; bStop = true; E6"+\-e } .FUws VO#x+u]/ D$C >ZF } D^cv
8 8< U5 X\RXy~ *1FDK{ /* ^%(HZ'$wC **FileAccess.java RTN?[` *//文件访问(定位,写) l1 (6*+ package NetFox; 0vN <0 import java.io.*; W\mj?R N ] KS\ \Fd6Q_ public class FileAccessI implements Serializable{ <A{|=2< !cP2,l'f //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 cj
?aCVa RandomAccessFile oSavedFile; rG7E[kii long nPos; ;pk4Voo$ p,_,o3@~ 2tz%A~}4 public FileAccessI() throws IOException vW`Dy8`06 { "B18|#v this("",0); Leg)q7n } y|r+< l=EnK"aU `SDpOqfIrP public FileAccessI(String sName,long nPos) throws IOException q-7C7q { t8vR9]n oSavedFile = new RandomAccessFile(sName,"rw"); 5%H(AaG*q this.nPos = nPos; W5C8$Bqm oSavedFile.seek(nPos); -Jqm0)2 } >Z0F n ~Mk{2;x L`sg60z public synchronized int write(byte[] b,int nStart,int nLen) 9o)sSaTx= { EPEy60Rx5 int n = -1; GnAG'.t-Z try{ R/!lDv!
oSavedFile.write(b,nStart,nLen); w'Y(doY, n = nLen; ?=
G+L0t
} TcW-pY<N catch(IOException e) 5ynBVrYf { uD'yzR!]+ e.printStackTrace (); i}&&rr } y]3`U
UvXD E[Xqyp!< '3%J hG)# return n; IP?15l w } [{!K'V `'W/uCpl QoLp$1O(y } "|N58% "0*yD[2 KjWF;VN*[3 /* 9Wu c1# **SiteInfoBean.java 7Shau%2C */ RB\
Hl package NetFox; [zC1LTXe %rFR:w`{ i2+r#Hw#5R public class SiteInfoBean { wDQ@$T^vh !+UU[uM 8+f{ / private String sSiteURL; //Site's URL /gX=79 private String sFilePath; //Saved File's Path [c^!;YBp) private String sFileName; //Saved File's Name N F$k~r private int nSplitter; //Count of Splited Downloading File *|gY7Av* HbI'n,+ 7`s*
{ public SiteInfoBean() v9,<2 {//nSplitter的缺省值为5 H^Mfj!S //default value of nSplitter is 5 5VS};&f this("","","",5); Ie<H4G5Vh } vU,V[1^a &6feR#~A bUzo> fm_ public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) ,59G6o { tG7F!um( sSiteURL= sURL; [X9T$7q#
sFilePath = sPath; DX2_}|$! sFileName = sName; SD/=e3 this.nSplitter = nSpiltter; |D% O`[k+ $#z-b@s=B {4n } 4,, @o
(U{,D1? Z5j\ M public String getSSiteURL() [S~/lm { $+k|\+iJ return sSiteURL; z|F38(%JJN } > `1K0?_ &%UZ"CcA c$.Zg= public void setSSiteURL(String value) N&uRL_X. { BS.5g<E2q sSiteURL = value; `K7UWtp } 4-CGe sck.2-f" =dT
#x public String getSFilePath() }6'%p Bd { _4f=\ return sFilePath;
UVd
^tg } HJi
FlL3 WaPuJ5;e &gg Om public void setSFilePath(String value) lt{D f~c { \wKnX]xGf sFilePath = value; $$
9!4 } U!GfDt 3v91 yMx .rwa=IW public String getSFileName() o5E5s9n { GI<3L K\ return sFileName; aD&4C-,1 } /;5/7Bvj ~eyZH8& !C& ^%a public void setSFileName(String value) H %Dcp#k { d4m@u$^1B sFileName = value; N;HG@B!m } \>\_OfY1W Pil_zQ4 !DM GAt\ public int getNSplitter() [ KDNKK { Z?<&@YQS return nSplitter; uhm3}mWv } h:AB`E1 3s0I<cL |})v,
oB public void setNSplitter(int nCount) V"|`Z}XW { @iU(4eX nSplitter = nCount; b&*)C#7/T } ;d.gVR_V } V2SHF Q-?6o c :2 w(BVi /* ":_~(?1+ **Utility.java )zydD=,bu */ \>tx:;D3 package NetFox; C)mR~Ey o3X0c6uU d3]<'B:nb public class Utility { >rYkVlv P9o=G=i >x1yFwX}-f public Utility() 7fC:'1]G { 1=_Qj}!1 [;Jq=G8&t z?t75#u9. } goOw.~dZ' -cWGF //线程睡眠 !A:d9 k public static void sleep(int nSecond) d
f
j;e%H { ]m :Y|,:6 try{ n= q7*<l Thread.sleep(nSecond); @e-2]z } #]h&GX catch(Exception e) iHT=ROL { q $=[v e.printStackTrace (); j6E|j>@u } ^x2@KMKXZ } MJA;P7g XE8%t=V!c$ //日志 y7Nd3\v [\ public static void log(String sMsg) P7epBWqDP { L1kAAR System.err.println(sMsg); T7^?j :kJ/ } C;%1XFzM T930tX6"h %us#p|Ya public static void log(int sMsg) Js&.p9S2 { `<6FCn4{X System.err.println(sMsg); VsDY,=Ww } 0$_WIk } h!7Lvh`o hGcu(kAC, 92ngSaNC /* BZ,{gy7g7X **TestMethod.java Y[s}?Xu]w# */ s`|KT&r package NetFox; G1Vn[[%k p~v0pi P9x':I$ public class TestMethod {
D,()e^o {mB!mbr
}S;A%gYm public TestMethod() w3&L 6|, { ///xx/weblogic60b2_win.exe A@eR~Kp
^ try{ 30O7u3Zrb SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); *6G@8TIh //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); <b?$-Rx SiteFileFetch fileFetch = new SiteFileFetch(bean); x->+wJm@s fileFetch.start(); }tQ^ch; Q } _:%i6c*" catch(Exception e){e.printStackTrace ();} ]!uId#OH TPYh<p# ?KWo1 } @p@b6iLpO $$XeCPs0 "8Lv public static void main(String[] args) 72vp6/;) { )SJ"IY\P new TestMethod(); z0UtKE^b } +~sqv?8 } dU2:H} 点击下载更多相关资料
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