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/* |>1hu1 **SiteFileFetch.java 2<r\/-#pU */ @*O?6> package NetFox; |b.z*G import java.io.*; a.kbov( import java.net.*; K+d2m9C= ?IW_O~Js q=5l4|1 public class SiteFileFetch extends Thread { :tj-gDa\Y s~L</Xvo
Qc"'8kt SiteInfoBean siteInfoBean = null; //文件信息Bean 8q^o.+9 long[] nStartPos; //开始位置 7"2b H long[] nEndPos; //结束位置 p
EusTP FileSplitterFetch[] fileSplitterFetch; //子线程对象 q]c5MlJXF long nFileLength; //文件长度 ALT^8c&K boolean bFirst = true; //是否第一次取文件 nC njq= boolean bStop = false; //停止标志 )D@~|j: File tmpFile; //文件下载的临时信息 E^V| DataOutputStream output; //输出到文件的输出流 6|;Uq' }nrXxfu //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) {aOkV:: public SiteFileFetch(SiteInfoBean bean) throws IOException !xK=#pa { eSy(~Y siteInfoBean = bean; [kB
` //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); 5ukp^OxE tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); WlVl[/qt if(tmpFile.exists ()) pGGmA;TC1 { ?S[Y:<R{: bFirst = false; wWjG
JvJ read_nPos(); iEHh{H( } @wN
G else lj[,|[X7` { M]rO;^ ;6? nStartPos = new long[bean.getNSplitter()]; gPXa>C nEndPos = new long[bean.getNSplitter()]; j,-C{ K } 93Yn`Av; $P {K2"Oc QwWW!8 :8f[|XR4\N } 0!GAk b>=_*nw9 Paf%rv2 public void run() q9*MNHg} { U~f4e7x*O //获得文件长度 5LW}h^N //分割文件 6(V
/yn~ //实例FileSplitterFetch E4%j. //启动FileSplitterFetch线程 Ib`-pRU; //等待子线程返回 O<*5$,K9 try{ E5GJi if(bFirst) 5er@)p_ { qRB7Ec_ nFileLength = getFileSize(); l]LxL if(nFileLength == -1) p.K*UP { fw-\|fP System.err.println("File Length is not known!"); C"pB"^0 } XEH}4;C'{ else if(nFileLength == -2) k5BXirB { 2.I^Xf2 System.err.println("File is not access!"); [0;buVU. } GF<[ } else JgfVRqm
{ t'qL[r%? for(int i=0;i<nStartPos.length;i++) ^rAa"p 9 { k3Cz9Vt% nStartPos = (long)(i*(nFileLength/nStartPos.length)); Ub$n |xn } YV'pVO'_+ for(int i=0;i<nEndPos.length-1;i++) vp)Vb^K> { p.JXSn nEndPos = nStartPos[i+1]; n(ir[w#,]" } n{5NNV6 nEndPos[nEndPos.length-1] = nFileLength; m?CZQq, } 4mYCSu14:` } ?8V
UOx s|yVAt|= @tUoD>f //启动子线程 #Z,E><t fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; ':h
=*v8a for(int i=0;i<nStartPos.length;i++) Rd&9E { kyYLP"oB= fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), _r Y,}\ siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), ;@mRo`D` nStartPos,nEndPos,i); Gs0H@ Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); _'0
@%P% fileSplitterFetch.start(); X"asfA[6K } },-* // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), Tenf:Hm/k siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); q3e8#R)l // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", }(FPV*mS nEndPos = " + nFileLength); r`'y?Bra; // fileSplitterFetch[nPos.length-1].start(); R=)55qu wD\ZOn_J Kyg=$^{>G //等待子线程结束 VDF)zA1V //int count = 0; e)^j+ l //是否结束while循环 X*eW#|$\ boolean breakWhile = false; uBnoQ~Qd[z P1>AOH2yG
=Ufr^naA while(!bStop) f{#j6wZM { {d3<W N write_nPos(); NaUr!s Utility.sleep(500); O~Wt600{E breakWhile = true; 9]'&RyH=# I~*
? d N!&:rK for(int i=0;i<nStartPos.length;i++) b-5y9 K { xG2+(f#C1 if(!fileSplitterFetch.bDownOver) m#e3%150{ { ]88];?KS} breakWhile = false; xJ8%<RR!t break; ,zTb<g } ?`_jFj+<\S } L5YnG_M& if(breakWhile) ,,L2(N break; Kn;D?ioY [/M^[p *LC+ PZV@ //count++; * *H&+T/B //if(count>4) Y.#:HRtgW // siteStop(); u+t$l^S } po9
9 y- K4Dp:2/K% /$N~O1"0) System.err.println("文件下载结束!"); z&8un%Jt } |R/.r_x,V? catch(Exception e){e.printStackTrace ();} IeX^4rc( } (h-*_a}F4 i+3fhV x`RTp:# //获得文件长度 ?(6m VyIe public long getFileSize() 5+Mdh` { MTGiAFE int nFileLength = -1; "L&'Fd@ZU try{ :wqC8&V URL url = new URL(siteInfoBean.getSSiteURL()); F|bYWYED; HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); ikB Yd
}5 httpConnection.setRequestProperty("User-Agent","NetFox"); G$zL)R8GE| f$HH:^# YZ$ZcfXDW int responseCode=httpConnection.getResponseCode(); 1k%k`[VC if(responseCode>=400) 0yM[Z':i'{ { bAk&~4Y_" processErrorCode(responseCode); C#;jYBtT7? return -2; //-2 represent access is error b#)UUGmI } $h[QQ- ppIbjt6r S/ywA9~3Q String sHeader; aA`/E p{)5k Qe"pW\ for(int i=1;;i++) FbnO/! $8 { cXMhq<GkAA //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); G.'+-v=\] //Utility.log(in.readLine());
6 Si-u sHeader=httpConnection.getHeaderFieldKey(i); s^OO^%b if(sHeader!=null) OYC_;CP { DmVP if(sHeader.equals("Content-Length")) h4pTq[4* { V==z" nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); RE$`YCs5 break; 8x{B~_~ } ZPN
roCK` } >gKh else 88"Sai break; tGdf/aTjy } j;_c+w!P } \o-&f: catch(IOException e){e.printStackTrace ();} D0(xNhmKz catch(Exception e){e.printStackTrace ();} Z|9u]xL =$8nUX` Cp`j/rF Utility.log(nFileLength); CBQhIvq.d 7+TiyY]K "N:XzG return nFileLength; :!;'J/B@.. } ]9=h%5Ji> AB Xl j6~nE'sQ //保存下载信息(文件指针位置) "TV(H+1,z private void write_nPos() 3($"q]Y {
@=]~\[e\ try{ vkS)E0s output = new DataOutputStream(new FileOutputStream(tmpFile)); e6X[vc|Y} output.writeInt(nStartPos.length); o[ENp'r for(int i=0;i<nStartPos.length;i++) ultG36.x { 3lLMu B+ // output.writeLong(nPos); ._wkj output.writeLong(fileSplitterFetch.nStartPos); 5WqXo{S output.writeLong(fileSplitterFetch.nEndPos); 5G0$ } i`/+,< output.close(); =K&\E2kA4 } 6qe*@o catch(IOException e){e.printStackTrace ();} $wYtyN[ catch(Exception e){e.printStackTrace ();} cw&Hgjj2
} .*$OQA O9'x-A% ;
UiwH //读取保存的下载信息(文件指针位置) MRr</o private void read_nPos() \ 6EKgC1 { LAx4Xp/ try{ 1iL'V-y DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); 0w'j+ int nCount = input.readInt(); Et"?8\"n7 nStartPos = new long[nCount]; zJM S=r nEndPos = new long[nCount]; Sx*oo{Kk% for(int i=0;i<nStartPos.length;i++) "'^4*o9 { j7FN\
cz nStartPos = input.readLong(); 2#X4G~>#h nEndPos = input.readLong(); 1[*UYcD } Nf3.\eR input.close(); C 8#@+ Q. } 4E8JT#& catch(IOException e){e.printStackTrace ();} EA.D}X C catch(Exception e){e.printStackTrace ();} N3t0-6$_ } H9 C9P17 ?::NO Dg oHM
] private void processErrorCode(int nErrorCode) lcON+j { kE.x+2 System.err.println("Error Code : " + nErrorCode); 4fh^[\ } 3`O?16O s#h8%[' /wQL //停止文件下载 H@X oqgI public void siteStop() IUGz =%[ { 6*9}4` bStop = true; ~5ZvOX6L2 for(int i=0;i<nStartPos.length;i++) 3qH QX?a fileSplitterFetch.splitterStop(); nmlPX7!{$ @RD+xYm HhA -[p } Xqp|VbDca } w)E@*h<Z //负责部分文件的抓取 A6<C-1
N}j **FileSplitterFetch.java 6nDV1O5 */ j^`X~gE package NetFox; d
"BW/%m|g LL!.c n?#!VN3 import java.io.*; PYB+FcR6?n import java.net.*; fQWIw t{! ci,+Bjc public class FileSplitterFetch extends Thread { 0uVv<Q~ )/4(e?%= k'`m97B String sURL; //File URL >-T`0wI long nStartPos; //File Snippet Start Position \^+ILYO:$ long nEndPos; //File Snippet End Position y$Zj?Dd# int nThreadID; //Thread's ID I9$c F)zk boolean bDownOver = false; //Downing is over XA0(f* boolean bStop = false; //Stop identical ;y?);!g FileAccessI fileAccessI = null; //File Access interface fLN! EDq sfp,Lq` 4kp im public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException vY6W|<s { m:tiY
[c>W this.sURL = sURL; S6nhvU: this.nStartPos = nStart; k>4qkigjc this.nEndPos = nEnd; NQTnhiM7$ nThreadID = id; ?9j{V7h fileAccessI = new FileAccessI(sName,nStartPos);//定位 3K/Df# } HCA{pR` $X`y%*<<v V|Tud public void run() +\`vq"e { a+41|)pt while(nStartPos < nEndPos && !bStop) .r|*Ch#;P { %:6?Y%`*[ 7D" %%|:
h 9>m%`DG* try{ iCG`3(xL URL url = new URL(sURL); :bM+&EP HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); -xmf'c9P httpConnection.setRequestProperty("User-Agent","NetFox"); H(u+#PIIw String sProperty = "bytes="+nStartPos+"-"; O0l^*nZ46t httpConnection.setRequestProperty("RANGE",sProperty); rp!
LP#* Utility.log(sProperty); ,#u\l>&$ $j`
$[tX6l uq7T{7~< InputStream input = httpConnection.getInputStream(); 0O@_cW //logResponseHead(httpConnection); Go\VfLL w Eyh|a.)- PB'0?b}fab byte[] b = new byte[1024]; |g)FA_#|< int nRead; ND]S(C"? while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) $`Nd?\$ { N{akg90 nStartPos += fileAccessI.write(b,0,nRead); _j#SpL'P //if(nThreadID == 1) Rc$h{0K8 // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); <HoAj"xf } nnCug QEJGnl676 \3Jq_9Xv Utility.log("Thread " + nThreadID + " is over!"); s3t!<9[m bDownOver = true; Ub)I66 //nPos = fileAccessI.write (b,0,nRead); ksI>IW } )q^ Bj$ catch(Exception e){e.printStackTrace ();} ;b~~s.+ } ziL^M"~2 } Hhv$4;&X # mT]j"" Dx+K+( //打印回应的头信息 bkQ3c-C< public void logResponseHead(HttpURLConnection con)
IsYP0(L { X-Ycz 5? for(int i=1;;i++) 2_pz3<,\ { :EHQ .^ String header=con.getHeaderFieldKey(i); #}o<v|; if(header!=null) T%I&txl //responseHeaders.put(header,httpConnection.getHeaderField(header)); c~tAvDX Utility.log(header+" : "+con.getHeaderField(header)); xb^Mo.\[ else =MSu3<y, break; [&VxaJ("3 } 'DAltr< } h5onRa*7 ~775soN 'j79GC0 public void splitterStop() \iZ1W { :C%47qv bStop = true; h~ha } @d)a~[pm T
T"3^@ D@hmO]5c } yiT{+;g^ ;BTJ%F. c!D> {N
/* Nmf#`+7gCI **FileAccess.java v MWC(m *//文件访问(定位,写) qJMp1DC package NetFox; Yq;&F0paK import java.io.*; % +8 z(UX't (q eCL?mh K public class FileAccessI implements Serializable{
rk|a'& \>[gl!B_Rr //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 b-b;7a\N RandomAccessFile oSavedFile; '%O\E{h long nPos; KgU[ 6SAQDE \[E-: public FileAccessI() throws IOException f[M"EMy { :wCC^Y] this("",0); :+A;TV } <w11nB) YD+QX@ #ZwY?T
x public FileAccessI(String sName,long nPos) throws IOException _Fvsi3d/ { ^ N_`^m oSavedFile = new RandomAccessFile(sName,"rw"); {lKEZirO this.nPos = nPos; mZ &] oSavedFile.seek(nPos); &@Yoj %% } L`bo#,eg6 v_.j/2U N>T=L0` public synchronized int write(byte[] b,int nStart,int nLen) t9n'! { ^)'||Ly int n = -1; p!V)55J* try{ C890+(D~ oSavedFile.write(b,nStart,nLen); @) ]t8( n = nLen; )S"o{N3B } q .)^B@}_ catch(IOException e) ;W =by2x* { {S# 5g2 e.printStackTrace (); K
oL%}u& } T)*l' g' *,_2hvlz 1W4H-/Re return n; >EyvdX#v } )z|_*||WU^ `jt(DKB+J 1gO//fdI } +# A|Zp< J78Qj[v SlM>";C\ /* -U&098}<K **SiteInfoBean.java 6YB-}>? */ __Vg/C!W package NetFox; %Gnd"SGs ei(|5h 6!i(
\Q* public class SiteInfoBean { qsQ]M^@> ~ly`u
pyGFDB5_P private String sSiteURL; //Site's URL r< N-A?a private String sFilePath; //Saved File's Path s2kGU^]y private String sFileName; //Saved File's Name $v2S;UB v* private int nSplitter; //Count of Splited Downloading File &n,xGIG aA!@;rR<yU 9}IVNZc public SiteInfoBean() jTGS6{E {//nSplitter的缺省值为5 gt(X!iN] //default value of nSplitter is 5 .CB"@.7 this("","","",5); #h}IUR } pRb+'v&_k Uj
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<Ay?c public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) `"-`D!U?$ { H"kc^G+(R" sSiteURL= sURL; j X^&4f sFilePath = sPath; T=iZ9w sFileName = sName; 6ba2^3GH this.nSplitter = nSpiltter; mRix0XBI~ 5G
dY7t_1 e%5'(V-y, } rVc
zO+E ;+#za?w N
P0Hgd public String getSSiteURL() 3/#R9J# { `t/@ L: return sSiteURL; /;]B1T7 } iLI.e rm I*`=[nR D{3 x}5 public void setSSiteURL(String value) 9 Le/'o vq { \I`=JKYT sSiteURL = value; ~ L i% } Sj=69>m]5 vb80J<4 dcc%G7w public String getSFilePath() 8M(|{~~3: { 0'`8HP return sFilePath; cxF?&0[mY } WPh |~]by< :w&)XI34 `mHOgS>| public void setSFilePath(String value) 9^[5!SMzCj { ~_^o?NE, sFilePath = value; j@_) F^12 } 8bKWIN g_n :6Pc m3 yADN_ public String getSFileName() 6XxG1]84 { Ubos#hP return sFileName; O%Gsk'mo } ^5'/ }iR2N &s}@7htE >[P7Zlwv4 public void setSFileName(String value) lN`_0 { g,GbaaXH sFileName = value; YO!7D5rV # } la"A$Tbu~ q9]^+8UP ?GD?J(S public int getNSplitter() J7xT6Q= { |% YzGgp7 return nSplitter; LK-6z w5=( } "VVR#H}{ SAo\H 22|M{ public void setNSplitter(int nCount) $?J LCa { &)f++(i nSplitter = nCount; 5\kZgXWIh } )s7 Tv#[ } en#g<on ;>8TNB e! wj:3 /* O> ^~SO **Utility.java /E
yg*# */ gwB>oi*OE package NetFox; RDZh>K
PG EKS<s82hF& WUK.>eM0 public class Utility { Jz3<yQ- $cpQ7 h/bYtE public Utility() }(%}"%$ { |b@A:8ss GvtI-\h] h|uP=0 } l
)V43 1~u\]Zi=D //线程睡眠 sU_4+Mk public static void sleep(int nSecond) #2'&=?J1r { }fMFQA) try{ ./*,Thc Thread.sleep(nSecond); @`*YZq>p } bme#G{[)Y catch(Exception e) e6xjlaKb { z>g& ?vo2 e.printStackTrace (); "/-v 9 } 1xV1#'@[Jd } iKH T /2V',0 //日志 b%t9a\ 0V public static void log(String sMsg) 7Bd_/A($ { MCpK^7]k System.err.println(sMsg); X.Y)'qSf } H0NyxG< 0]0M>vx
u ?G<IN) public static void log(int sMsg) v86`\K*0Y { w7V
W System.err.println(sMsg); #X_ M } TBfl9Q } U.h PC3 (uz!:dkvx .u3W]5M| /* n:)Y'52} **TestMethod.java $gK>R5^G> */ :!FwF65 package NetFox; TL:RB)- < %d\+(:uu/ [+7X&B public class TestMethod { 6RodnQ =B%e0M _Hj,;Z public TestMethod() Vo8"/]_h { ///xx/weblogic60b2_win.exe {0{$.L try{ bvTkSEN SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); 9DE)5/c`v //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); Bn:sN_N SiteFileFetch fileFetch = new SiteFileFetch(bean); $ayD55W4 fileFetch.start(); "!?Ya{ } K#m o+n5-; catch(Exception e){e.printStackTrace ();} }epN<DL F\<i>LWT' n8,/olqwW } [wYQP6Cyy ^[akB|#\9 cXH?'q'vZ public static void main(String[] args) Pw.+DA { n_glYSV! new TestMethod(); ]h@:Y] } ,/9|j*9H } /9Xf[< 点击下载更多相关资料
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