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/* I[w;soI **SiteFileFetch.java c-oIP~, */ bmQ-5SE package NetFox; ~-2Gx
HO` import java.io.*; 9$*O ^ import java.net.*; bw8[L;~%_ 8;v/b3 Wy.^1M/n>~ public class SiteFileFetch extends Thread { @(W{_ mw >e"vPW*[ g T{WH67u SiteInfoBean siteInfoBean = null; //文件信息Bean W)jtTC7 long[] nStartPos; //开始位置 <^da-b>C long[] nEndPos; //结束位置 Xj5oHHwn FileSplitterFetch[] fileSplitterFetch; //子线程对象 %$[#/H7=W long nFileLength; //文件长度 .D{He9 boolean bFirst = true; //是否第一次取文件 <?FkwW\? boolean bStop = false; //停止标志 ^`?M~e2FZ8 File tmpFile; //文件下载的临时信息 p;Nq(=]
\ DataOutputStream output; //输出到文件的输出流 `e4gneQY sd&^lpH //负责整个文件的抓取,控制内部线程(FileSplitterFetch类)
$5\+QW public SiteFileFetch(SiteInfoBean bean) throws IOException ac!!1lwA { YhQ%S} siteInfoBean = bean; N;S1s0FN //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); @@V{W)rl tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); qO{Yr$V% if(tmpFile.exists ()) N4)ZPLV { *X l,w2@ bFirst = false; kp3%"i&hD read_nPos(); 'h87A-\!F } 'YvRkWf:KC else p(6KJK\ { D"M[}$P nStartPos = new long[bean.getNSplitter()]; N|e#& nEndPos = new long[bean.getNSplitter()]; ?/q\S } 4o|<zn UvF5u(o mqK}yK^P] @!Rklhb } Q.,2G7[ < 8Z!Mad T#GTNk!v public void run() u*$]Bx { l i)
5o //获得文件长度 UY(\T8 //分割文件 F R(k==pZ //实例FileSplitterFetch hn=tSlte //启动FileSplitterFetch线程 -*$ s ;G# //等待子线程返回 B!1h"K5.($ try{ {s>V'+H(F if(bFirst) '81c>qA { SS6K7 nFileLength = getFileSize(); Mp?L9 if(nFileLength == -1) GK=b { Xp[x O 0 System.err.println("File Length is not known!"); ,lcSJ^yr } Y?ZzFd,i& else if(nFileLength == -2) NXX/JJ+w { z/,&w_8,: System.err.println("File is not access!"); L+8{%\UPd } *WfQi8 else CE @[Z { }<^QW't_Y for(int i=0;i<nStartPos.length;i++) "0 $UnR { _tRRIW"Vx" nStartPos = (long)(i*(nFileLength/nStartPos.length)); Z&of-[) } &B\ sG= for(int i=0;i<nEndPos.length-1;i++) 0X:$ASocU { Y @Ur} nEndPos = nStartPos[i+1]; e}+Zj'5 } _FxeZ4\ nEndPos[nEndPos.length-1] = nFileLength; @{"?fqo } MK(~ } s:3b. *t< !Ahxi);a ^yX >^1 //启动子线程 [2PPa9F fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; HR;I}J 9 for(int i=0;i<nStartPos.length;i++) _2TL>1KZt { 24u_}ZQzY fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), _#qfe siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), ;I?x;lH nStartPos,nEndPos,i); J7Mbv2D Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); yy Y\g fileSplitterFetch.start(); O(6j:XD } Y/sZPG}4 // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), 03c8VKp'p siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1);
~owodc // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", ?,i}Qr [Q nEndPos = " + nFileLength); >Ptu-* // fileSplitterFetch[nPos.length-1].start(); qOy0QZ#0 [
ebk u_ pI_dV44W //等待子线程结束 L{rd', //int count = 0; W{c
Z7$d //是否结束while循环 GVhy
}0| boolean breakWhile = false; k{H7+;_ z'7XGO'Lo e/&^~ $h while(!bStop) E\ls- (, { 3m| C8: write_nPos(); THARr#1b}; Utility.sleep(500); O?O=]s
u breakWhile = true; mVFo2^%v BOWBD@y <_c8F!K)T for(int i=0;i<nStartPos.length;i++) bObsj] { Nz}PcWF/ if(!fileSplitterFetch.bDownOver) d^f rKPB { *%Fu/ breakWhile = false; %lD+57= break; txvo7?Y*4 } O4Q"2 } `?O0) if(breakWhile) 7MGvw-Tpb7 break; qtmKX 3YJ"[$w='( w2 r //count++; zez|l //if(count>4) [N12X7O3 // siteStop(); d&\3}uH } Z&79: 9=#> =^SxZ Bn \2]_NU5. System.err.println("文件下载结束!"); \Hdsy="Dnh } lF_"{dS_6( catch(Exception e){e.printStackTrace ();} -QwH| } px*1 3" XDHi4i47`o 050,S`%<g8 //获得文件长度 tHAe public long getFileSize() L^r & .N\ { ;s;3cC! int nFileLength = -1; xW]65iav try{ a9UXg<4 URL url = new URL(siteInfoBean.getSSiteURL()); kIX1u<M~ HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); !JyY&D~` httpConnection.setRequestProperty("User-Agent","NetFox"); Svb>s|D tJ
2GSZ` .`Q^8|$-K int responseCode=httpConnection.getResponseCode(); tbWfm5$ if(responseCode>=400) {VKFw=$8 { ]Axz}: processErrorCode(responseCode);
EY:IwDA.} return -2; //-2 represent access is error *AYq:n6 } ""Da2Md '_^T]fr} z:@:B:E String sHeader; {}$Zff 0|J_'-< 7}g4ePYag for(int i=1;;i++) |Fi5/$S. { TL)*onA9 //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); (0B?OkQ //Utility.log(in.readLine()); DzQ sHeader=httpConnection.getHeaderFieldKey(i); l#`G4Vf if(sHeader!=null) #fYB4.i~ { tc<uS%XT4^ if(sHeader.equals("Content-Length")) 6pSi-FH { N0.|Mb"?t nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); 4l+!Z, b break; R(`:~@3\6 } !?(7g2NP) } tAF?.\x"g else #{PwEX
!Ct break; ,zltNbu\.( } !
5NuFLOf } 8AX_y3$ catch(IOException e){e.printStackTrace ();} :nQlS catch(Exception e){e.printStackTrace ();} ]"lB!O~ 7jgj;% w4vV#C4X Utility.log(nFileLength); Rd&DH_<+^ _$ivN!k >WIc"y. return nFileLength; xbm%+ } ]S%(l, o87kF!x %VH, (}i //保存下载信息(文件指针位置) nuXL{tg6 private void write_nPos() =o~GLbsER { sVK?sBs] try{ +a3E=GJ output = new DataOutputStream(new FileOutputStream(tmpFile)); >
[J. output.writeInt(nStartPos.length); 8 {V9)U for(int i=0;i<nStartPos.length;i++) w y|^=#k { Q-n8~Ey1a // output.writeLong(nPos); ;~EQS.Qp output.writeLong(fileSplitterFetch.nStartPos); d51'[?( output.writeLong(fileSplitterFetch.nEndPos); Aj)Q#Fd[ } xwf-kwF8^ output.close(); nUOi~cs } t/\ catch(IOException e){e.printStackTrace ();} ?B1Zfu0 catch(Exception e){e.printStackTrace ();} pA6KiY& } !g9k9 l V}Y*Yv E4L?4>V@\ //读取保存的下载信息(文件指针位置) ]7O<|8n!d private void read_nPos() W&IG,7tr { ?: yz/9( try{ { aUnOyX_ DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); [mA-sl] int nCount = input.readInt(); A^>@6d $2 nStartPos = new long[nCount]; 3R3H+W0{ nEndPos = new long[nCount]; ~w+I2oS$ for(int i=0;i<nStartPos.length;i++) G
aV&y { <qwf"Ey nStartPos = input.readLong(); N2v/< nEndPos = input.readLong(); wSN9`" } m$fEk,d input.close(); cm(*F0< } C/!.VMl^ catch(IOException e){e.printStackTrace ();} 4|=>gdW)KN catch(Exception e){e.printStackTrace ();} ?vFy3 } Lwr's'ao. ^_;'9YD wqb4w7% private void processErrorCode(int nErrorCode) ^$K&Met { Yv5H41o" System.err.println("Error Code : " + nErrorCode); u4C9ZYN } U!aM63F3 V4n~Z+k GtVT^u_ //停止文件下载 H#~gx_^U public void siteStop() ,~1'L6Ri? { L"qJZU bStop = true; zuV%`n for(int i=0;i<nStartPos.length;i++) "bm|p/A fileSplitterFetch.splitterStop(); 2'DCB{Jv )l7XZ_gw' ;=Ma+d# } *an Ng<@ } >fH0>W+! //负责部分文件的抓取 Vr1}Zv3K' **FileSplitterFetch.java
/MGapmqV9 */ |9#q7kM package NetFox; {A/r) EtKq.<SJ j_~KD} import java.io.*; 2R[v*i^S import java.net.*; a!9'yc b=,BLe\ mn7I# ~ public class FileSplitterFetch extends Thread { R2,9%!iiX m+<&NDj. 2n:<F9^" String sURL; //File URL x]{P.7IO' long nStartPos; //File Snippet Start Position Mg;pNK\n long nEndPos; //File Snippet End Position E#$Jg|e int nThreadID; //Thread's ID Vu:ZG*^ boolean bDownOver = false; //Downing is over Q$E.G63Wl boolean bStop = false; //Stop identical [';o -c"! FileAccessI fileAccessI = null; //File Access interface hdPGqJE %Mda<3P (S~kyU!)0 public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException cx\E40WD { qGk.7wf% this.sURL = sURL; nTeA=0 4 this.nStartPos = nStart; @dWA1tM this.nEndPos = nEnd; l<v{8:,e # nThreadID = id; JQV%W+-@ fileAccessI = new FileAccessI(sName,nStartPos);//定位 \ 'm7un } iWs6 !s! Kh]es,$D #a e@VedM public void run() q+?&w'8 { WqeWjI.2 while(nStartPos < nEndPos && !bStop) /Q1 b%C { _3`GZeGV %;[DMc/ *k{Llq try{ h`&TDB2 URL url = new URL(sURL); Kxsd@^E HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); MntmBj-T httpConnection.setRequestProperty("User-Agent","NetFox"); SZWNN#w60? String sProperty = "bytes="+nStartPos+"-"; )Te\6qM httpConnection.setRequestProperty("RANGE",sProperty); ~7:q+\ Utility.log(sProperty); `<YMkp[ QVT0.GzR G\sx'#Whc InputStream input = httpConnection.getInputStream(); w
<r*& //logResponseHead(httpConnection); +(+lbCW/ xV>
.] Xf4Q Lw/r byte[] b = new byte[1024]; /!]K+6>u int nRead; 7X$CJ%6b while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) iC#a+G*N_M { '.v;/[0 nStartPos += fileAccessI.write(b,0,nRead); -H60T,o
//if(nThreadID == 1) iJ{axa & // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); ] &8em1 } 3r~8:F"g (JbRhcg +6WjOcu Utility.log("Thread " + nThreadID + " is over!"); dn h qg3Y bDownOver = true; .\b.l@O<Z //nPos = fileAccessI.write (b,0,nRead); b `P6Ox3 } jJ2rfdfj catch(Exception e){e.printStackTrace ();} 6()Jx% } !X}+JeU' } MT{1/A;`) *). z
0?Me H# //打印回应的头信息 [J2evi? public void logResponseHead(HttpURLConnection con) >!fTWdD^ { `{#""I^_ for(int i=1;;i++) |j+JLB { dpW`e>o String header=con.getHeaderFieldKey(i); upMs yLp( if(header!=null) s)\PY //responseHeaders.put(header,httpConnection.getHeaderField(header)); 4-bM90&1t Utility.log(header+" : "+con.getHeaderField(header)); eEqcAUn else 0*MUe1{ break; w"v96%"Y } 8(? &=>@ } {L$$"r, dw6ysOR@ zTue(Kr public void splitterStop() nk!uO^ { 6PsT])*>DE bStop = true; xhALJfv } 5YrzOqg= \(??Ytc<B *L<EGFP } f#c}}>V8 6GuTd MgiW9@_( /* CV[ 9i **FileAccess.java J{4=:feIC? *//文件访问(定位,写) ZKI8x1>Iq package NetFox; K-'uE) import java.io.*; 4l0>['K&{ W(62.3d~}? %|4Kak]:Q public class FileAccessI implements Serializable{ Lum=5zDo 1!zd#TX //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 )7NK+k RandomAccessFile oSavedFile; VK/L}^=GOO long nPos; U9BhtmY c6jVx_tt. `"~GqFwy~ public FileAccessI() throws IOException |g hyH { KEy8EB this("",0); 2?qT,pN } W
/v
&V# 0<V/[$}\D ]R~hzo public FileAccessI(String sName,long nPos) throws IOException V1,p<>9 { yFm88 oSavedFile = new RandomAccessFile(sName,"rw"); [m! P(o this.nPos = nPos; e>_a
( oSavedFile.seek(nPos); sC"w{_D@*4 } 6# bTlmcg otaRA zZd.U\"2 public synchronized int write(byte[] b,int nStart,int nLen) _k}Qe; { #bcZ:D@FC int n = -1; 0[H/>%3O try{ `)$G}7cRUH oSavedFile.write(b,nStart,nLen); P*[wB_^&UP n = nLen; E;H9]*x/ } pa^_D~ catch(IOException e) H{*rV>% { SDbkPx e.printStackTrace (); me@`;Q3 } SP<(24zdd IPTFx
)]G `#ff`j|a return n; jBEW("4R } o]I8Ghk>/z vMY!Z1.* CY=lN5!J } I\Y N! KO`dAB F} Ze/\IBd /* \R9izuc9 **SiteInfoBean.java [zl4"|_` */ 'Jek<
5 package NetFox; CY':'aWfa< X Y4N7# 5 public class SiteInfoBean { 60n>FQ< 2WLLI8 nWc@ufY private String sSiteURL; //Site's URL eKuF7Oo private String sFilePath; //Saved File's Path Sz|kXk6&9 private String sFileName; //Saved File's Name p5"pQeS private int nSplitter; //Count of Splited Downloading File %Cj_z `'3&tAy w)&4i$Lk6 public SiteInfoBean() eU)QoVt {//nSplitter的缺省值为5 Txl|F\nK` //default value of nSplitter is 5 ;Y8>? this("","","",5); #I MaN% } v2r|)c,h wQ/.3V[ z&c} public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) Qe!3ae`Z { ?v:FGO sSiteURL= sURL; FzSL[S4i sFilePath = sPath;
Oc,HnyV+ sFileName = sName; .*n*eeD, this.nSplitter = nSpiltter; 2rC& E 6MeM'sx J8@.qC'! } I5QtPqB> ue?3;BF 5 a>-qHX-l public String getSSiteURL() 0t(c84o5 { _Wk*h}x return sSiteURL; SXe1Q8; } __+8wC <_kA+&T MSBrI3MqQ public void setSSiteURL(String value) mJ(ElDG { 7;Lv_Y"b sSiteURL = value; pUqNB_ } g'w"U9tjO "1XTgCu\ )/[L)-~y~ public String getSFilePath() XM"Qs.E { G=gU|& ( return sFilePath; }/\`'LQ } \ntUxPox. [n&ES\o#( 2wPc
yD public void setSFilePath(String value) \M|:EG% { G; exH$y sFilePath = value; *"Iz)Xzc` } D
vU1+y Z5F#r>> ` a[z$ae7 public String getSFileName() LXJ;8uW2y { 9@IL5 47V return sFileName; NX8hFwR } WI*CuJU<zJ vf#d dIh+h|: public void setSFileName(String value) bZAL~z+ V { IsJx5GO sFileName = value; PJ?C[+& } (C
uM*- XHdhSFpm f[R~oc5P0 public int getNSplitter() bWlYQ
{ _!vy|,w@e return nSplitter; =-r); d } y3j"vKG d-m.aP)y: ux!YVvTPd public void setNSplitter(int nCount) |&
jrU-( { <I2ENo5? nSplitter = nCount; &%@O V:C } G3]#Du } Nmt~1.J 5a@9PX^.J ~Ma r /* .m\0<8C **Utility.java Wb cm1I) */ <Uj9~yVN] package NetFox; X6(s][Wn \G)F* ":s_O. public class Utility { WcM\4q@ >KdV]!H );q~TZ[Do public Utility() .oLV\'HAR { W[j,QU rev*G: %yjD<2J; } v[8+fd)}S T2.[iD!A //线程睡眠 ITn PF{N public static void sleep(int nSecond) 3Z me?o*bY { f{[0;qDJ try{ liLhvcd Thread.sleep(nSecond); %m[ZU<v } FINHO058^Y catch(Exception e) PXJ7Ek*/ { WK7?~R%rq e.printStackTrace (); 7OG:G z+)x } gGM QRRq } s0D4K k 9z9{ //日志 XQfmD;U public static void log(String sMsg) -}h^'# { d}ycC.h4k System.err.println(sMsg); ~Fwbi } Sl ^PELU ZE_ hLk6Hqr7 public static void log(int sMsg) %OO}0OW { mb1c9 System.err.println(sMsg); V?wV*]c } 3b]M\F9 } R)\^*tkz7 BbCO K woPj>M /* Za3}:7`Gu **TestMethod.java BL_0@<1X */ /T(9:1/G package NetFox; > l0H)W Qs59IZ gOW8!\V public class TestMethod { Hk h'h"_r &{+ 0a[rN y5+%8#3 public TestMethod() {Y Y,{H { ///xx/weblogic60b2_win.exe E0&d*BI2 try{ fbbbTZy SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); Dat',5 //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); k>.8 lc\ SiteFileFetch fileFetch = new SiteFileFetch(bean); PcU~1m1 fileFetch.start(); 0('ec60u } ?8GS*I catch(Exception e){e.printStackTrace ();}
HDZl;= Iapz,nuE ~eoM
2XlW }
<9yh:1"X u{\'/c7G S5y.H public static void main(String[] args) zhFm2 { fbOqxF"?we new TestMethod(); )=29Hm" } rZaO^}u] } fC*cqc~{@ 点击下载更多相关资料
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