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/* x*'H@!!G **SiteFileFetch.java Fp@> (M#3 */ F7*)u-4Yn package NetFox; ^Mq@} 0 import java.io.*; [pmIQ228 import java.net.*; ~+t@7A= lOeX5%$Z !1i-"rR public class SiteFileFetch extends Thread { R-NM ~gp ^t7u4w! S ;rd0+J SiteInfoBean siteInfoBean = null; //文件信息Bean 0(f+a_2^Q long[] nStartPos; //开始位置 DW9MX`!Xc long[] nEndPos; //结束位置 o_mjI: FileSplitterFetch[] fileSplitterFetch; //子线程对象 'm6bfS^T long nFileLength; //文件长度 Lp(`m=;O boolean bFirst = true; //是否第一次取文件 hbvcIGaT boolean bStop = false; //停止标志 Nr$78] o9 File tmpFile; //文件下载的临时信息 R_+:nCB@, DataOutputStream output; //输出到文件的输出流 82EvlmD Z#Nw[>NN* //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) WrDFbcH public SiteFileFetch(SiteInfoBean bean) throws IOException 7rRI-wZ { f"j9C%'* siteInfoBean = bean; 1_f+!
ns# //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); Udtz zka tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); k,=<G, if(tmpFile.exists ()) ]N'%l]_$ { m3pDFI bFirst = false; W3>9GY90R read_nPos(); ]jVE } OOXSJE1 else 2P8wvNDG { 1?|"33\03R nStartPos = new long[bean.getNSplitter()]; oNPvks dC; nEndPos = new long[bean.getNSplitter()]; P)f8lU^z } Ot\[Ya'' Y
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([~o .(cpYKFX } &}P#<"Fo8Q =d ;#Nu- 5rck]L' public void run() |36%B7H { Bx5xtJ|! //获得文件长度 |J:r]);@K //分割文件 #CI0G //实例FileSplitterFetch X,3\c: //启动FileSplitterFetch线程 FA{Q6fi:2 //等待子线程返回 $3p 48`.\ try{ 9^n0<(99b if(bFirst) ]*k ~jY, { F>#F@j^c nFileLength = getFileSize(); I9+h-t if(nFileLength == -1) j][&o-Ev { XPMUhozV System.err.println("File Length is not known!"); o jxK8_kl } wH@S$WT else if(nFileLength == -2) [@VzpVhXz { G[ #R 1' System.err.println("File is not access!"); @Z'i7Z } d@{12hq else <^5$))r { NI,>$@{ for(int i=0;i<nStartPos.length;i++) p\;8?x { %RtL4"M2j nStartPos = (long)(i*(nFileLength/nStartPos.length)); F::Ki4{jJ } rL"]m_FK for(int i=0;i<nEndPos.length-1;i++) 2%R.~9HtA { [efU)O& nEndPos = nStartPos[i+1]; b?iPQ$NyQ } Nb ~J'" nEndPos[nEndPos.length-1] = nFileLength; b,+KXx } U7n#TPet } #>:S&R?2t Os>&:{D 4! Myg;2 . //启动子线程 g7hI9(8+ fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; m`8{arz2 for(int i=0;i<nStartPos.length;i++) J>T98y/)) { JS m7-p|E fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), 0H4|}+e siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), e4Ibj/ nStartPos,nEndPos,i); P
nE7} Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); 9{A4> fileSplitterFetch.start();
*?1\S^7R } oVHe<zE. // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), j96}E/gF siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); #Ox@[Z1I // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", ._]Pz6 nEndPos = " + nFileLength); hV,T889'
// fileSplitterFetch[nPos.length-1].start(); s
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//等待子线程结束 l(Hz9 //int count = 0; H"w;~;h //是否结束while循环 )_j(NX-C: boolean breakWhile = false; !'#
D~ sDg1nKw( 3p HI+a while(!bStop) WO%pX+PoH { d\3 %5Y write_nPos(); 1QmOUw}yj Utility.sleep(500); 2Uf/' breakWhile = true; %?+Lkj& !a\v)R zTMLE~w for(int i=0;i<nStartPos.length;i++) T&6>Eb0{ { .Y7Kd+)s)L if(!fileSplitterFetch.bDownOver) X0j> g^b8 { W(ryL_#; breakWhile = false; fNx!'{o" break; ~V ?z!3r-) } @ls/3`E/5E } fATVAv if(breakWhile) nJv=kk1|o break; T<Y*();Zo aLW3Ub{h Sw>>]UjU //count++; D[]0/+, //if(count>4) ipGxi[Vav // siteStop(); 9wf"5c } ZZHQ?p- Tzjv-9^V +Z_VF30pa System.err.println("文件下载结束!"); alzdYiGf } G~&8/ s catch(Exception e){e.printStackTrace ();} 58HAl_8W } [ t8]'RI% ,37<FXX, ;q%z\gA //获得文件长度 YSPUQ public long getFileSize() uUq= L { oBub]<.J int nFileLength = -1; {)b try{ -:r<sv$ URL url = new URL(siteInfoBean.getSSiteURL()); 0>-}c> HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); t~ I;IB httpConnection.setRequestProperty("User-Agent","NetFox"); xuqG)HthRS w1zMY:9 |%XcI3@* int responseCode=httpConnection.getResponseCode(); |[#Qk 4Ttf if(responseCode>=400) %o\+R0K { [+A]E,pv]1 processErrorCode(responseCode); 9vDOSwU* return -2; //-2 represent access is error {=d}04i)E" } 2auJp
. J1gnR $A,YQH+ String sHeader; i E;F=Rb oVp/EQ 8#,_%<?UVy for(int i=1;;i++) Au)~"N~p? { ^A\(M%*F //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); M(\{U"%@? //Utility.log(in.readLine()); "B +F6 sHeader=httpConnection.getHeaderFieldKey(i); Pz
D30VA if(sHeader!=null) 4IY|< { ]3 GO_tL if(sHeader.equals("Content-Length")) AG%[?1IXW { /4 Kd nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); +zDRed_]=_ break; zHNBX
Rx } DS@Yto } RTg\c[=w else "|&3z/AUh break; oXk6,b" } oz]3
Tx } v/~&n catch(IOException e){e.printStackTrace ();} 6~{'\Z catch(Exception e){e.printStackTrace ();} "G*$# \AoqOC2u )J+OyR= Utility.log(nFileLength); &'Nzw2 T]/> c Ax=)J{4v return nFileLength; }z9v*C } F+BCzsm7$ GZx*A S]+ :YkAp9civ //保存下载信息(文件指针位置) /7+b.h])^ private void write_nPos() !L9]nO 'BL { c}),yQ|!: try{ |-*50j l output = new DataOutputStream(new FileOutputStream(tmpFile)); S{MB$JA output.writeInt(nStartPos.length); U%BtBPL for(int i=0;i<nStartPos.length;i++) )OQ<H.X { ?0sTx6x@ // output.writeLong(nPos); GCr]x ' output.writeLong(fileSplitterFetch.nStartPos); ld|GY>rH output.writeLong(fileSplitterFetch.nEndPos); X+u1p? } vQ2{+5!| output.close(); e~'z;%O~ } /d"@$+ catch(IOException e){e.printStackTrace ();} PX23M|$! catch(Exception e){e.printStackTrace ();} /ET+`=n } SEi\H$! ?< yYm;B ;0 +Dx~ //读取保存的下载信息(文件指针位置) 0/!0W%f[} private void read_nPos() SS_6VE*sI { .ej+?QYwC try{ p9\*n5{ DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); IW@phKz int nCount = input.readInt(); {w"Cr0F, nStartPos = new long[nCount]; }$uwAevP{y nEndPos = new long[nCount]; `@,Vbn^_ for(int i=0;i<nStartPos.length;i++) G[_Z|Xi1 { \WdSj nStartPos = input.readLong(); x\:KfYr4Y; nEndPos = input.readLong(); br k*; } +`mI\+y, input.close(); <rui\/4NJ } e$Yvy>I'tS catch(IOException e){e.printStackTrace ();} G^VOA4 catch(Exception e){e.printStackTrace ();} Sj/v: } F9las#\J s?9Y3]&+&M #k>A, private void processErrorCode(int nErrorCode) L>7@!/9L { qJonzFp7 System.err.println("Error Code : " + nErrorCode); \x4:i\Fx@ } # SJJ@SM _"t>72
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") //停止文件下载 ,-(D(J;}1 public void siteStop() 7D 3-/_ v { TOa6sB!H bStop = true; s!MD8ia for(int i=0;i<nStartPos.length;i++) kj4=Q\Rfm fileSplitterFetch.splitterStop(); 5X5UUdTM @;hdZLG]`& `*kl> }$ } H=Cj/jE } !SnLvW89Z //负责部分文件的抓取 '<ZHzDW@ **FileSplitterFetch.java kou7_4oS */ 4
540Lw'A package NetFox; ${wp}<u_ =_@) KWeX$ ug;\`.nT^ import java.io.*; ;9 ChBA import java.net.*; -^7
$HD Tj<B;f!u W*(- *\1[ public class FileSplitterFetch extends Thread { 9O Y ao SwO$UqYU= 61gyx6v String sURL; //File URL DYgB_Iak long nStartPos; //File Snippet Start Position K@Q%NK, long nEndPos; //File Snippet End Position iG~&uEAJ int nThreadID; //Thread's ID @8A[HP boolean bDownOver = false; //Downing is over O%F*i2I:+k boolean bStop = false; //Stop identical ouFKqRs; FileAccessI fileAccessI = null; //File Access interface <1*\ ~CX R4k+.hR =i;T?*@ public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException k:@N6K/$P^ { UH\{:@GjNO this.sURL = sURL; VUHf-bKl this.nStartPos = nStart; E
GZiWBr this.nEndPos = nEnd; 7#9%,6Yi nThreadID = id; $T7 qd
fileAccessI = new FileAccessI(sName,nStartPos);//定位 #O8=M(- V } >w.%KVBJ vW? /: @B(E&
public void run() F:Ps> { L=C#E0{i while(nStartPos < nEndPos && !bStop) :!?Fq/! { t6\--lk_ #mK?:O\-1 Gui[/iY,F try{ uf (_<~ URL url = new URL(sURL); Lz:FR* HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); %4YSuZg httpConnection.setRequestProperty("User-Agent","NetFox"); EQ :>]O String sProperty = "bytes="+nStartPos+"-"; -XwS?*O httpConnection.setRequestProperty("RANGE",sProperty); eT(X Ri0 Utility.log(sProperty); &uBfsa$ B8.}9 a+a6P5kJ InputStream input = httpConnection.getInputStream(); /nX_Q?mo //logResponseHead(httpConnection); IX<9_q l]&x~K} nvNF~)mu byte[] b = new byte[1024]; + DE/DR: int nRead; 8xhx*A while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) A 2A_F|f { <$25kb R5K nStartPos += fileAccessI.write(b,0,nRead); Xrpvq(] //if(nThreadID == 1) C>,> _ // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos);
! R3P@,j } R?- zJ ; =#<bB)59 X{ 6a Utility.log("Thread " + nThreadID + " is over!"); BB(v,W bDownOver = true; DVKb`KJ" //nPos = fileAccessI.write (b,0,nRead); `R.Pz _oe } T,vh=UF%] catch(Exception e){e.printStackTrace ();} UTN[!0[
} .P?n<n# } 2Yd@V} "*W# z )N1iGJO) //打印回应的头信息 A^LS^!Jz public void logResponseHead(HttpURLConnection con) 5IFzbL#q#f { N`N?1!fM<} for(int i=1;;i++) Zkqq< { ~
L>M-D4o String header=con.getHeaderFieldKey(i); Q1|zX@, if(header!=null) PDCb(5 //responseHeaders.put(header,httpConnection.getHeaderField(header)); Ze#DFe$ Utility.log(header+" : "+con.getHeaderField(header)); Y>
}\'$\b else EIyFGCw|U break; uZ>q$
F } *">CEQ[MT } k#8`996P bw7g L\* u7Ix7`V public void splitterStop() 3?L[ohKH?: { r
)_*MPY bStop = true; {d0-. } nLv~)IQ}: cx&\oP n4}e!
} 6 v~nEw zDbO~.d aIrM-c8.O /* U[8F{LX **FileAccess.java ^&8hhxCPu| *//文件访问(定位,写) {~s\a2YH package NetFox; I;eoy, import java.io.*; eO*s,* ;$gV$KB:xA i1m>|[@k public class FileAccessI implements Serializable{ F[!%,-* tm2lxt //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 ,Oy$q~. RandomAccessFile oSavedFile; EBz4k)@m long nPos; Z2H bAI8 U,61 3G d%epM5 public FileAccessI() throws IOException cs9h\]ZA { s8P3H|0.- this("",0); hlze]d?z } bqp^\yu-E 2k^rZ^^" }Q ]-Y : public FileAccessI(String sName,long nPos) throws IOException @pYC!;n+ { 3]9Rmx oSavedFile = new RandomAccessFile(sName,"rw"); ,9_O4O% this.nPos = nPos; wAX;)PLg oSavedFile.seek(nPos); dGkw%3[ } 8e,F{>N N mxh zjJ lcjOBu public synchronized int write(byte[] b,int nStart,int nLen) 4>v O9q { j6XHH&ZEb int n = -1; m.1-[ 2{8~ try{ J:&.[ oSavedFile.write(b,nStart,nLen); v>Kh5H5e~ n = nLen; g;6/P2w } B, H9EX catch(IOException e) D_ ~;!^ { -;&I S e.printStackTrace (); ZX1/6|_ } '-[hy>t m6$&yKQ-=h DLqH*U return n; Vwh;QJxb } bDJ!Fc/ _od /)# G e]NA]< } tgi%#8ZDpz @U1|?~M%s r=vY-p /* 5$HG#2"Kb# **SiteInfoBean.java R9#ar{ */ y %61xA`# package NetFox; bu_@A^ys d,(q3 |uw48*t public class SiteInfoBean { Fw{@RQf8 .35~+aqC V\{@c%xW private String sSiteURL; //Site's URL M<*Tp^Y' private String sFilePath; //Saved File's Path ~OPBZ# private String sFileName; //Saved File's Name ytjZ7J['{ private int nSplitter; //Count of Splited Downloading File !t"/w6X1I {#,5C H') t&=bW<6 public SiteInfoBean() <#nU 06 fN {//nSplitter的缺省值为5 b$fmU"%&| //default value of nSplitter is 5 O2pE"8=4Q this("","","",5); +_cigxpTc } &|ne!wu p5vQ.Ni*\- L[Z^4l_! public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) Us'JMZ~ { z~3ubta8(@ sSiteURL= sURL; a{^z= = sFilePath = sPath; ]w _&%mB sFileName = sName; I]+
zG this.nSplitter = nSpiltter; .FgeAxflP )j~{P K{/i2^4 } t,8?Tf+i "#7Q}d!x <3@nv% public String getSSiteURL() !-470J { F1- "yX1B return sSiteURL; 7z1@XO<D } LmqSxHs0Q r0lI&25w Tgtym"=xd public void setSSiteURL(String value) DzE^FY { Y<VX.S2kf sSiteURL = value; eaDZ^Z
Er } MZ-;'w&Z #-G@ p Ot`%5<E^ public String getSFilePath() fx(8 o+ { &&P9T/Zks return sFilePath; uj.$GAtO) } $p0D9mF 3!gz^[!?EN #t(/wa4 public void setSFilePath(String value) { >[ ]iX { V61oK sFilePath = value; /4pYhJ8S }
lqL5V"2Y ArAe=m!u @YH>|{S& public String getSFileName() 4_j_!QH87 { ov, return sFileName; @#t<!-8d } nKr'cb .u#Hg'o P wUr(i * public void setSFileName(String value) (UjaL@G { yGt[Qvx# sFileName = value; Ew
PJ|Z^ } ?;`GCE JcmMbd&B 36+/MvIT public int getNSplitter() R(^Sse { m]MR\E5]By return nSplitter; 5Wa)_@qI)` } XA;PWl5! \M@IKE 2SD
Z public void setNSplitter(int nCount)
&R4?]I { Tb?X KO, nSplitter = nCount; _zM?"16I} } KNQj U-A } Y_ne?/sZE t!/~_}eD J FO^6c /* M*3G **Utility.java [j@i^B & */ zzI,iEG package NetFox; 9M9Fif. F#<:ZByjJ@ 2D"my]FnF public class Utility { `V V>AA5 M$ieM[_T *'aJO}$ public Utility() +,)k@OI { ll$mRC uuFQTx)) &ot^+uVH } <>n|_6'$90 7ixG{yu //线程睡眠 kDmuj>D public static void sleep(int nSecond) 0Q7<;'m { }[PwA[k' try{ [3-u7Fx! Thread.sleep(nSecond); .Er+*j;&w } N5 ; z5E catch(Exception e) DKMkCPX% { P8dMfD*"E e.printStackTrace (); s,[I_IiPf } RbxQTM_:M } e> 9X 7lwI]/ZH* //日志 CckfoJ 9 public static void log(String sMsg) Sft
vN- { |-\anby< System.err.println(sMsg); DPW^OgL; } Lc}hjK W9c&"T9JT ,D`jlY-1l public static void log(int sMsg) 6<S-o|Xw { R||$Rfe System.err.println(sMsg); x<!]#**; } wj}LVyV } oP56f"BE( !L9|iC:8 ^vG<Ma.yk /* C7m/< **TestMethod.java v ,h"u */ JP\jhkn package NetFox; dPpQCxf >T[Y>] `fEzE\\!* public class TestMethod { [|*7"Q( u?SwGXi~8 zJ8T.+qJ public TestMethod() dT 7fyn { ///xx/weblogic60b2_win.exe Wkk(6gS, try{ 3)=ix. wW SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); |-/@3gPO //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); L6nsVL& SiteFileFetch fileFetch = new SiteFileFetch(bean); F^Jz
fileFetch.start(); k^K76m B } {*hFG:u catch(Exception e){e.printStackTrace ();} 7)#JrpTj% @YaI5> ,/ pd: YR; } lj&\F|-i ol_\ " td\gk public static void main(String[] args) 8lqmd1v { W!XBuk- new TestMethod(); 3*%+NQIj } RfvvX$ } #X*);cn 点击下载更多相关资料
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