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/* 9)Fx;GxL **SiteFileFetch.java mj~:MCC */ 'nmA!s package NetFox; |$RNY``J import java.io.*; 2KlQ[z4Ir import java.net.*; ~}Xus?e A,}M ^$@ <ql,@*Y public class SiteFileFetch extends Thread { #b/qR^2qW '7Gv_G_ g'8Y5x[ SiteInfoBean siteInfoBean = null; //文件信息Bean w;z7vN~/O long[] nStartPos; //开始位置 =[6^NR( long[] nEndPos; //结束位置 a`xq
h2P FileSplitterFetch[] fileSplitterFetch; //子线程对象 ,>GHR{7>( long nFileLength; //文件长度 ~b f\fPm boolean bFirst = true; //是否第一次取文件 J:xGEa t boolean bStop = false; //停止标志 Ql*zl File tmpFile; //文件下载的临时信息 dY*q[N/pO DataOutputStream output; //输出到文件的输出流 "mlQ z4D)5 @60D@Y //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) sV\_DP/l public SiteFileFetch(SiteInfoBean bean) throws IOException C]`uC^6g { $Ome]+0 siteInfoBean = bean; c8l>OS5i3_ //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); *FlPGBjJ tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); "6B7EH if(tmpFile.exists ()) fz&B$1;8 { -@orIwA& bFirst = false; %TB(E<p` read_nPos(); I6>J.6luF9 } .iXN~*+g else z/@_?01T= { }A#IBqf5 nStartPos = new long[bean.getNSplitter()]; 7]ieBUfS nEndPos = new long[bean.getNSplitter()]; $[gN#QW% } Y'v[2s ]lB zp D /:{%X(8 Cf{F"o } $ghZ<Y2}9 }3pM,. dmFn0J-\ public void run() NYm"I`5w { k6G
_c;V //获得文件长度 ys[Li.s: //分割文件 oMh$:jR $ //实例FileSplitterFetch 0RUk^ //启动FileSplitterFetch线程 $|K
d<wv //等待子线程返回 K1&
QAXyP try{ / f%mYL if(bFirst) yI0bSu<j- { 55[ 4)* nFileLength = getFileSize(); _(W@FS if(nFileLength == -1) dG\wW@}J { YeH!v, > System.err.println("File Length is not known!"); 1W^hPY } y<)TYr else if(nFileLength == -2) f:c'j` { 8|u4xf< System.err.println("File is not access!"); Z;BS@e } rIyH/=; else ;b~ S/ { _;lw,;ftA for(int i=0;i<nStartPos.length;i++) tFN >]`Z { $] 6u#5 nStartPos = (long)(i*(nFileLength/nStartPos.length)); @MW@mP)# } Zt=|q$" for(int i=0;i<nEndPos.length-1;i++) Q&9yrx. { Zk3Pv0c nEndPos = nStartPos[i+1]; 20:F$d } lu8G$EQI nEndPos[nEndPos.length-1] = nFileLength; u9lZHh#V- } Fq9YhR } Y.:R-|W sI ,!+ $Y/9SD
//启动子线程 0;Z|:\P\= fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; <izQ]\kL for(int i=0;i<nStartPos.length;i++) /{M<FVXK+| { YQVo7"`% fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), G6SgVaM siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), )rc!irac] nStartPos,nEndPos,i); <p@Cx Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); KA3U W fileSplitterFetch.start(); d}
>Po%r: } 4l D$'` // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(),
q+P@2FL siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); .)Tj}Im2p // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", q"2QNF' nEndPos = " + nFileLength); v.0qE}'
| // fileSplitterFetch[nPos.length-1].start(); g \mE Fs+tcr/\[ O
zAIz+` //等待子线程结束 4kOO3[r //int count = 0; )G[byBa //是否结束while循环 % rBzA< boolean breakWhile = false; 1S{Biqi+ _e%D/} w.qtSW6M+ while(!bStop) b)wcGBS { 2u{~35 write_nPos(); c*USA
eP Utility.sleep(500); n<?U6~F&~ breakWhile = true; qxL\G &~ Qg> NJ\*Q rd <m:r for(int i=0;i<nStartPos.length;i++) STKL { 2TK \pfD if(!fileSplitterFetch.bDownOver) uvys>]+ { iP:i6U] breakWhile = false; C.j+Zb1Z( break; KE?t?p } W.wPy@yi } i~B?p[ if(breakWhile) D9rQ%|}S break; h~dQ5% #w$Y1bjn {Jr1K, //count++; `Rq=:6U;3 //if(count>4) 8|&,JdT // siteStop(); qGk+4 yC } #2Rz=QI bM W|:rn F.s$Y+c!6 System.err.println("文件下载结束!"); ]8G 'R-8} } }\_.Mg^y catch(Exception e){e.printStackTrace ();} K#"=*p, } ,p2UshOmd u6iW1,# #^FM~5KK //获得文件长度 b,!C8rJ public long getFileSize() !R{IEray { kG^76dAQL int nFileLength = -1; \!KE_7HRu try{ B|`?hw@g+ URL url = new URL(siteInfoBean.getSSiteURL()); a@}.96lStD HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); iTxWXij httpConnection.setRequestProperty("User-Agent","NetFox"); _"DC) r&=ulg Bfb~<rs[ int responseCode=httpConnection.getResponseCode(); ct+F\:e if(responseCode>=400) $QbJT`,mr { q~{)
{t; processErrorCode(responseCode); c
r=Q39{ return -2; //-2 represent access is error *)^6'4= }
manw;`Q 4P{|H c~|(j \FI String sHeader; !Vpi1N\ ;`AB- U32$9" for(int i=1;;i++) VZ]iep { UB~K/r`.| //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); e02Hf{eOfw //Utility.log(in.readLine()); .ARYCTyG sHeader=httpConnection.getHeaderFieldKey(i); F`=p/IAJK if(sHeader!=null) 0d2P { S!K<kn`E3 if(sHeader.equals("Content-Length")) U1\EwBK8*T { jaS<*_~#R nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); ammi4k/ break; ~M~DH-aX } 5SFr
E` } :s)cTq| 3 else If'q8G3]- break; 1UQ,V`y } xU'z>y4V$ } 2H%9l@}u catch(IOException e){e.printStackTrace ();} 18$d-[hX catch(Exception e){e.printStackTrace ();} H3wJ5-q( q@.>eB'92P IIk_!VzT Utility.log(nFileLength); VuLb9Kn \zd[A~! rrIyZ@_d9 return nFileLength; A}fm).Wp@ } 7cc^n\c?Y FDoPW~+[ eP~bl
//保存下载信息(文件指针位置) PRfq_:xy private void write_nPos() .Ys
e/oEo { &%J{uRp try{ , ['}9:f9 output = new DataOutputStream(new FileOutputStream(tmpFile)); 4U2{1aN` output.writeInt(nStartPos.length); lpT&v;$` for(int i=0;i<nStartPos.length;i++) &M-vKc"d { 8W3zrnc // output.writeLong(nPos); 5OM#_.p output.writeLong(fileSplitterFetch.nStartPos); le*+(aw
output.writeLong(fileSplitterFetch.nEndPos); :N8n6)#1= } Bzz|2/1y output.close(); qrMED_(D } ~+.= catch(IOException e){e.printStackTrace ();} w_"d&eYdg0 catch(Exception e){e.printStackTrace ();} `2>p#` } tSy 9v |JkfAnrN$I %9YY \a { //读取保存的下载信息(文件指针位置) "#)|WVa=BM private void read_nPos() u|KjoO
{ Na@bXcz) try{ Kebr>t8^ DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); hp f0fU int nCount = input.readInt(); ,#;hI{E nStartPos = new long[nCount]; MkW=sD_ nEndPos = new long[nCount]; V 7,dx@J- for(int i=0;i<nStartPos.length;i++) Gf8 ^nfr { 2:
QT`e& nStartPos = input.readLong(); l]G
iz& nEndPos = input.readLong(); 628iN%[- } #WjQ'c: input.close(); $ :I{
} T]wC?gQG catch(IOException e){e.printStackTrace ();} 'VVU-)(8 catch(Exception e){e.printStackTrace ();} )q x;/=D } G]h_z|$K B=KrJ{&! ;*?>w|t}w private void processErrorCode(int nErrorCode) SM~ ~: { cfmLErkp System.err.println("Error Code : " + nErrorCode); ,h=a+ja8 } aiPm.h> B}[CU='P* =!-} q //停止文件下载 zS:2?VXxq public void siteStop() J0V m&TY { ILr=<j bStop = true; +-tFg XG for(int i=0;i<nStartPos.length;i++) +cfcr* fileSplitterFetch.splitterStop(); 8SpG/gl" { <Gyjq ;PaU"z+Je~ } -sJ1q^;f@ } !aSj1
2J //负责部分文件的抓取 !4Aj#`) **FileSplitterFetch.java 7R:j^"I@ */ ezw*Lo! package NetFox; "R5G^-<hp YM`T"`f *zUK3&n~I import java.io.*; ?OW!D? import java.net.*; *AV%= Uha.8 D>k(#vYKB public class FileSplitterFetch extends Thread { XQ~Xls%]
z~2{`pET W=HvMD String sURL; //File URL lU
62$2 long nStartPos; //File Snippet Start Position uxyj6( long nEndPos; //File Snippet End Position 7c"Csq/]I int nThreadID; //Thread's ID $'KQP8M+ boolean bDownOver = false; //Downing is over c:7V.. boolean bStop = false; //Stop identical e6MBy\*n FileAccessI fileAccessI = null; //File Access interface =?$~=1SL+ (Y'cxwj% mrr]{K public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException ]I)ofXu] { L\UPM+tE this.sURL = sURL; Yuw:W:wY this.nStartPos = nStart; ?j8!3NCl} this.nEndPos = nEnd; 7j)ky2r# nThreadID = id; GXxI=,L8F fileAccessI = new FileAccessI(sName,nStartPos);//定位 "gy&eR> } hDi~{rbmc 56JQ h O?g;Ny public void run() 6=n|Ha { T1qbb* while(nStartPos < nEndPos && !bStop) .X%J}c$ { |&"aZ!Kn \dCGu~bT FzEs1hpl try{ 9287&+,0r URL url = new URL(sURL); M6&=- HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); <y8oYe_! httpConnection.setRequestProperty("User-Agent","NetFox"); Tr_gc~ String sProperty = "bytes="+nStartPos+"-"; $F^VtCx2& httpConnection.setRequestProperty("RANGE",sProperty); F%<*a,m6g Utility.log(sProperty); f2[R2sto@ q{`1[R M?YNK] InputStream input = httpConnection.getInputStream(); ="78#Wfj2 //logResponseHead(httpConnection); MO$yst?fK W:8MqVm34 )T"Aji-hy byte[] b = new byte[1024]; ;[;WEA int nRead; t@R[:n;+ while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) wxqX42v { el`?:dY H nStartPos += fileAccessI.write(b,0,nRead); y>}r //if(nThreadID == 1) zHA::6OgPN // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); nHm29{G0 } l6#Y}<tq 9vP;i= fr 7)QZ<fme Utility.log("Thread " + nThreadID + " is over!"); Xuu&`U~% bDownOver = true; "LlQl3"= //nPos = fileAccessI.write (b,0,nRead); &(,\~ } 4/~x+tdc catch(Exception e){e.printStackTrace ();} Jy/<
{7j } lv=q( & } b5H}0< { Z
k^J <qfAW?tF //打印回应的头信息 %W9R08` public void logResponseHead(HttpURLConnection con) ~<!j]@. { e1a\-- for(int i=1;;i++)
O6NH { .Pj<Pe String header=con.getHeaderFieldKey(i); !O%!A<3 if(header!=null) %:'G={G`QH //responseHeaders.put(header,httpConnection.getHeaderField(header)); yVnG+R& Utility.log(header+" : "+con.getHeaderField(header)); aC`>~uX##V else k*?T^<c3 break; D&pn@6bB } @Pk<3.S0 } B>c$AS\5y {,JO}Dmu5 Mq<ob+ public void splitterStop() ;Tnid7:S { `$Rgn3 bStop = true; 1s(T#jh } g
ptf*^s xjr4')h T`wDdqWbEG } SI~jM:S} jbipNgxkr vN^.MR+< /* V3ht:>c9qs **FileAccess.java ~D3S01ecM *//文件访问(定位,写) s>o#Ob@4' package NetFox; )KE import java.io.*; &*>.u8:r ]O@iT= *3 te(H6c#0 public class FileAccessI implements Serializable{ uCr& ` ?D.+D( //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 _M/N_Fm RandomAccessFile oSavedFile; #?w07/~L long nPos; .2c/V I+H~ 5zq. sR1_L/. public FileAccessI() throws IOException 5?;<^J { 7tlK'j' this("",0); k5E2{&wZ } 3bWGWI _Z]l=5d 7ivo Q public FileAccessI(String sName,long nPos) throws IOException J{b#X"i { ,5v'hG oSavedFile = new RandomAccessFile(sName,"rw"); =xm7i#1 this.nPos = nPos; P4Pc;8T@! oSavedFile.seek(nPos); g6%]uCFB } nC p/.]Y* #4mRMsW5" @CzFzVmF" public synchronized int write(byte[] b,int nStart,int nLen) \ji\r ]k { N_K9H1r int n = -1; 4&cQW) try{ I}bu oSavedFile.write(b,nStart,nLen); t9U6\ru n = nLen; :@i+yN cV } aI&~aezmN catch(IOException e) 4,LS08&gh { _jG|kjFTc e.printStackTrace (); <VhmtT%7 } J[:#(c&c!1 fE~KWLm ISC>]` return n; &Tt7VYJfIV } -+@N/d5 ij0I!ilG4 g7]S } pYQSn.`V~ #aL.E(% @/kI;8 /* ]:Ep1DIMl **SiteInfoBean.java K9EHT- */ dP_QkO package NetFox; >hNSEWMY` CWkWW/ZI 1rZ E2 public class SiteInfoBean { KsOSPQDGE )!27=R/ 2*V%S/cck private String sSiteURL; //Site's URL dPu27 " private String sFilePath; //Saved File's Path _MC',p& private String sFileName; //Saved File's Name Eh8GqFEM private int nSplitter; //Count of Splited Downloading File K>+ v" x uuEvH<1 I%r7L public SiteInfoBean() =F_uK7W {//nSplitter的缺省值为5 s?}qia\~m //default value of nSplitter is 5 5z0Sns this("","","",5); A^,ul>! } ,JdBVt EM@|^47$ 0bh
6ay4 public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) r5s{t4 ;Ch { -Ct+W;2 sSiteURL= sURL; c9[{P~y sFilePath = sPath; 3iw3:1RZUZ sFileName = sName; e=VSO!(rY this.nSplitter = nSpiltter; <~uzHg%Y NxnRQS tZ[9qms^_ } d[l8qaD pP.`+vPi (9]1p; public String getSSiteURL() $O\m~r4 { 1R@G7m return sSiteURL; #9TL5-1y } Se!w(Y& J'WzEgCnU Jf2JGTcm public void setSSiteURL(String value) D,.`mX { ub8d]GZJ sSiteURL = value; R-zS7Jyox } ,Dv*<La`\ \uHC 9}0 |Jx:#OM public String getSFilePath() l tNI+G { W]Xwt'ABz return sFilePath; %R4 \[e } DtBvfYO8)> HR?T OiAuL:D public void setSFilePath(String value) !q$VnqFk { &w^9#L sFilePath = value; | t:UpP } l\L71|3" g 392(N( UUz{Qm% public String getSFileName() ;V~x[J|x { olQP>sa return sFileName; W>!:K^8] } dn'|~zf. K@n-# m#W XZr public void setSFileName(String value) ep3VJ"^ { 6k@F?qHS sFileName = value; ]/h$6mrL } '['%b FUSe!f nL^7t7mp public int getNSplitter() `%[m%Y9h { c86?-u') return nSplitter; <=|^\r
!}& } 1:<n(?5JI p}==aNZK "a;$uW@.6 public void setNSplitter(int nCount) O6$,J12l { S^~"# nSplitter = nCount; , SUx!o } F}mt
*UcMG } b'^<0c E2}X[EoBF KJ/Gv#Kj /* &jEw(P&_ **Utility.java b&E"r*i| */
M3UC9t9] package NetFox; J0k!&d8 Tr>_R%b K T] H'l public class Utility { 8)iI=,T* zytW3sTZA MA9E??p3\ public Utility() +(Hp ".gU { s w>B 1Bs t| j/oc+ M^ } _T.`+0UV 8[@Y`j8 //线程睡眠 ~a
V5 public static void sleep(int nSecond) zE8_3UC { 3s]o~I 2x try{ tol-PJS} Thread.sleep(nSecond); q@S\R
7R } \5N\NN @J catch(Exception e) ,e 7
~G { }t(5n $go6 e.printStackTrace (); ;K l'[~z } bRFZ:hu l } ~~WY?I- )RFY2} //日志 %! Sjbh public static void log(String sMsg) lhE]KdE3 { "}0QxogYE System.err.println(sMsg); f[NxqNn } G?~Yw'R^8 #Q_Scxf !j #8zN public static void log(int sMsg) Qg1kF^= { dw}ge,bBic System.err.println(sMsg); Tl"r# } vfT
@;` } iX2exJto V?T&>s 3`3my= /* Su@V5yz **TestMethod.java 8:I-?z;S */
StNA(+rT package NetFox; &!:mL], u9q#L.Ij U7zd7O public class TestMethod {
`|nJAW3 v8\_6}*I b~ig$!N] public TestMethod() \
D>!& { ///xx/weblogic60b2_win.exe m/g[9Y try{ USgO`l\}4 SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); /i!/)]*- //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); B|^=2 >8s SiteFileFetch fileFetch = new SiteFileFetch(bean); P"Q6 wdm fileFetch.start(); dZkKAK:v } 1'&HmBfcb catch(Exception e){e.printStackTrace ();} ze8 MFz'm ~r})&`5 y9i+EV } X+\=dhn69 #Ph8? ?`
ebi|6 public static void main(String[] args) "_rpErm
} { ^Kl<<pUaV new TestMethod(); T.{]t6t$U
} HD$r<bl } m=iKu(2xRq 点击下载更多相关资料
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