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/* "q9~C **SiteFileFetch.java L)kb (TH */ so?pA@O package NetFox; ;Ch+X$m9 import java.io.*; p@cfY]<7 import java.net.*; V_ +}^ l5ZADK4 9:9N)cNvfX public class SiteFileFetch extends Thread { [|:QE~U@ g{g`YvLu^ y+
6`|
h_ SiteInfoBean siteInfoBean = null; //文件信息Bean #/n|@z' long[] nStartPos; //开始位置 *1|YLy long[] nEndPos; //结束位置 _dYf FileSplitterFetch[] fileSplitterFetch; //子线程对象 Lf,CxZL5 long nFileLength; //文件长度 ?r
-\%_J_( boolean bFirst = true; //是否第一次取文件 #Acon7Rp boolean bStop = false; //停止标志 L?=#*4t File tmpFile; //文件下载的临时信息 6)=](VmNL` DataOutputStream output; //输出到文件的输出流 ffmG~$Yh_ 8N=%X-R% //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) H$NP1^5! public SiteFileFetch(SiteInfoBean bean) throws IOException Gt^|+[gD { Wphe%Of siteInfoBean = bean; ewb*?In //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); ntrY =Y tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); 8Zcol$XS' if(tmpFile.exists ()) n~1tm { (l\a '3a. bFirst = false; }G>v]bV0V read_nPos(); Ez06:]Jd } c[(yU#@ else /#-,R,Q { o/tVcv nStartPos = new long[bean.getNSplitter()]; C-s>1\I nEndPos = new long[bean.getNSplitter()]; .+{nA}Bc } EpRXjz /~H[= Pf /[\6oa <u6c2!I{ } MZCL:# .@y{)/ bWGyLo, public void run() 6@"Vqm|HD { @IEI%vH //获得文件长度 >|l;*Kw,/P //分割文件 X4d Xm>*?= //实例FileSplitterFetch gbY LA a //启动FileSplitterFetch线程 >]>0KQfO //等待子线程返回 J}x>~?W try{ 4^
c!_K&& if(bFirst) x1|Da$2 { ;V|M3 nFileLength = getFileSize(); ^7i^ \w0 if(nFileLength == -1)
$cRcap { [ Z#+gh System.err.println("File Length is not known!"); Of1IdE6~ } pBlRd{#fL else if(nFileLength == -2) (3e;"'k { 5Waw?1GL System.err.println("File is not access!"); Wr]O } 4a\n4KO X else xCR;
K]! { ]XmQ]Yit for(int i=0;i<nStartPos.length;i++) VYL@RL' { 6P0y-%[Gk nStartPos = (long)(i*(nFileLength/nStartPos.length)); cDfx)sL } LiiK3!^i for(int i=0;i<nEndPos.length-1;i++) 4st~3,lR$ { t{+M|Y nEndPos = nStartPos[i+1]; o)0C-yO0qf } 77+|#<J nEndPos[nEndPos.length-1] = nFileLength; /uK)rG
F } D~cW
]2 } =YWT|%^uX A{4Dzm ! *6NO-T; - //启动子线程 A;odVaH7 fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; S$S_nNq for(int i=0;i<nStartPos.length;i++) C>AcK#-x,{ { Z+Kv+GmqH fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), K|`+C1! siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), VMaS;)0f@ nStartPos,nEndPos,i); (F/HU"C Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); 6_W <hevI fileSplitterFetch.start(); smQ4CLJ } >NJjS8f5 // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), 2K3MAd{ siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); J
cP~-cp // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", 7rH'1U nEndPos = " + nFileLength); [:Be[pLC // fileSplitterFetch[nPos.length-1].start(); %_>Tcm= 1#/6r : g+e:@@ug //等待子线程结束 +H41]W6 //int count = 0; ,Qat //是否结束while循环 DNmb[ boolean breakWhile = false; $"/UK3|d DLU[<!C VK9Q?nu while(!bStop) JRD8Lz]Q3 { UMT\Q6p write_nPos(); Cy`26[E$S Utility.sleep(500); D)y{{g*Lnm breakWhile = true; v}Z9+ yRC2 [w,(EE +yGY785b for(int i=0;i<nStartPos.length;i++) =D{B}=D\IM { }I\-HP8!gv if(!fileSplitterFetch.bDownOver) :=y0'f
V(@ { Dzo{PstM% breakWhile = false; 'c#IMlv break; mU>&ql?e } o\&~CW~@~ } `(3SfQ- if(breakWhile) ooY\t + break; =PV/`I_h wcwQj Hwd
e]>/H8 //count++; e$HQuA~Q; //if(count>4) kQy&I3 // siteStop(); CF\R<rF<VS } |P>|D+I0 k'g$2 p<q].^M System.err.println("文件下载结束!"); AfN&n= d K } ,6DD=w 0r catch(Exception e){e.printStackTrace ();} }~rcrm. } /oFc03d vmvFBzLR ZBF1rx? //获得文件长度 $Y6 3!* public long getFileSize() V`by*s { #XcU{5Qm5 int nFileLength = -1; -/zp&*0gcx try{ <>]1Y$^Y URL url = new URL(siteInfoBean.getSSiteURL()); pL! a HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); IJ0#iA. T httpConnection.setRequestProperty("User-Agent","NetFox"); 7RD$=?o O' RE 9nU%! MA$Xv`6I\ int responseCode=httpConnection.getResponseCode(); Gbn4*<N if(responseCode>=400) 3524m#4&@ { Qo.Uqz.C processErrorCode(responseCode); vGMJ ^q return -2; //-2 represent access is error _PV*lK= } mW~P!7] t-!m
vx9Z pr$~8e=c String sHeader; D;jK/2 #Mg lHQO+ Ge^Qar for(int i=1;;i++) @ ICbKg: { 0Qp[\ia //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); |0kXCq //Utility.log(in.readLine()); Y87XLvig} sHeader=httpConnection.getHeaderFieldKey(i); Pr`s0J%m if(sHeader!=null) \"'\MA { z{|LQt6q if(sHeader.equals("Content-Length")) >ukQ, CE~ { (')(d
HHW nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); 8 aZ$5^z break; h8jB=e, H } +}U2@03I } ~,gLplpG0 else HxZ.OZbR break; ;SKcbws } LQqfi
~ } =T4u":#N; catch(IOException e){e.printStackTrace ();} ]IS;\~ catch(Exception e){e.printStackTrace ();} 1[s0Lz iX%n0i > ws!5q Utility.log(nFileLength); @cIgxp j=9ze op
% 2d 8=h6 return nFileLength; 6{.J:S9n
} pv&^D,H, _f|/*.
@Q ,#d[ad< //保存下载信息(文件指针位置) `eC+% O private void write_nPos() +ubnx{VC { jgq{pZ#E try{ # $~ oe" output = new DataOutputStream(new FileOutputStream(tmpFile)); ~RInN+N# output.writeInt(nStartPos.length); @VK6JjIq for(int i=0;i<nStartPos.length;i++) AkA!:!l { @1bH}QS // output.writeLong(nPos); OJpj}R output.writeLong(fileSplitterFetch.nStartPos); 'E -FO_N output.writeLong(fileSplitterFetch.nEndPos); ^C7C$TZS } G6Nb{m output.close(); NAJVr}4f } 7Cy<mS catch(IOException e){e.printStackTrace ();} }Eh*xOta catch(Exception e){e.printStackTrace ();} #wjH4DT } ^N- 'xy #\ #3r 7"cv|6y| //读取保存的下载信息(文件指针位置) \|t{e8} private void read_nPos() f4"4ZVcr { k':s =IXW try{ 6t7fa< DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); 9Ejyg* int nCount = input.readInt(); ]Ik%#l.G_ nStartPos = new long[nCount]; R=M!e<' nEndPos = new long[nCount]; "hPCQp`Tj for(int i=0;i<nStartPos.length;i++) <lj\#'G3 { R ]P;sk5 nStartPos = input.readLong(); >1ZJ{se nEndPos = input.readLong(); 6 P*O&1hv } sS9%3i/> input.close(); TzKK;(GX } wkBL=a catch(IOException e){e.printStackTrace ();} 3?`" catch(Exception e){e.printStackTrace ();} N4wA#\- } =~ jAoOC@ <2<87PU pbLGe' private void processErrorCode(int nErrorCode) d~Mg
vh' { i_ QcC System.err.println("Error Code : " + nErrorCode); 78]gtJ } JJnYOau jg_n 7 @Y-TOCadT //停止文件下载 S_\
F public void siteStop() -5k2j^r; { 2d`c! bStop = true; @;Y~frT for(int i=0;i<nStartPos.length;i++) Hg+
F^2<y fileSplitterFetch.splitterStop(); 2f,2rW^i %Q~CB7ILK jO8k6<l } .=<$S#x^Hb } E FY@Y[ //负责部分文件的抓取 o8ppMM8_R[ **FileSplitterFetch.java XUSvhr$| */ ^E,1V5 package NetFox; O3qM1-k}S Phs-(3 dR+1aY; import java.io.*; 4!%F\c46 import java.net.*; B42sb_ zwr\:Hu4 "b,%8 public class FileSplitterFetch extends Thread { +iA=y=;blH NXU`wnVJ ; Lql_1 String sURL; //File URL *e/K:k long nStartPos; //File Snippet Start Position T3 pdx~66 long nEndPos; //File Snippet End Position |B^G:7c int nThreadID; //Thread's ID Vmi{X b]< boolean bDownOver = false; //Downing is over ~uj;qq boolean bStop = false; //Stop identical ln<]-)&C FileAccessI fileAccessI = null; //File Access interface 6rX_-Mm6w s>%Pd7: T):SGW public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException Uyx&E?SlEq { zp4W'8
this.sURL = sURL; *b)Q5dw@1 this.nStartPos = nStart; x0Z5zV9 this.nEndPos = nEnd; *#&*`iJ( nThreadID = id; YZE.@Rz fileAccessI = new FileAccessI(sName,nStartPos);//定位 ~?U*6P)o } 0X9Y~TM% SEd5)0X^ J|~26lG public void run() CxF-Z7 ' { ~cqryr9
while(nStartPos < nEndPos && !bStop) P Sx304 { $nPAm6mH Qe$k3! jH*)%n5,\ try{ Q8qz*v]{ URL url = new URL(sURL); uk7'K 0j HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); m*e YC httpConnection.setRequestProperty("User-Agent","NetFox"); ^^Jnv{) String sProperty = "bytes="+nStartPos+"-"; EKZVF`L httpConnection.setRequestProperty("RANGE",sProperty); e/ s(ojDW Utility.log(sProperty); ]%dnKP~ :}q\tNY< \a|L/9% InputStream input = httpConnection.getInputStream(); pq!%?m] //logResponseHead(httpConnection); RBGX_v? ZafboqsDL I+;-p]~ byte[] b = new byte[1024]; L%cVykWY" int nRead; vqNsZ 8|` while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) 5#2F1NX { jC, FG'P nStartPos += fileAccessI.write(b,0,nRead); ,mFsM!| //if(nThreadID == 1) csQfic // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); xWX*tJ4 } eon!CE0 b ,^*mx= ;<wS+4, Utility.log("Thread " + nThreadID + " is over!"); mpay^.(% bDownOver = true; -J0WUN$2* //nPos = fileAccessI.write (b,0,nRead); ^TFs;|.. } d- E4~)Qy catch(Exception e){e.printStackTrace ();} 9NpD!A&64< } F%/h* } m7qqY
}5 9U}@xC yL1bS|@ //打印回应的头信息 $u9]yiY.{ public void logResponseHead(HttpURLConnection con) s0W2?!>) { O#kq^C} for(int i=1;;i++) =VP=|g { 2+"r~#K* String header=con.getHeaderFieldKey(i); JXU2CyMY if(header!=null) 8E^@yZo{ //responseHeaders.put(header,httpConnection.getHeaderField(header)); \wav?;z Utility.log(header+" : "+con.getHeaderField(header)); 1|QvN1? else 5g
;ac~g break; oFC) } Q<"[C
1Lj } CAc
%f9!3 eE]hy'{d< Om'(mr public void splitterStop() v3RcwySk { V5rp.~ bStop = true; PX,rWkOce } v."Dnl 9.+/~$Ht
,L YFEq_ } (9RslvKL ?Dsm~bkX[ n(;:*<Rh /* F?4(5 K **FileAccess.java kCP$I732 *//文件访问(定位,写) m
<k!^jp package NetFox; RDQ^dui import java.io.*; 6f%DpJ:$U RMXzU f-RK,#^?, public class FileAccessI implements Serializable{ j|(Z#3J c6AWn>H //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 xi'>m IT RandomAccessFile oSavedFile; ^4$'KIq long nPos; cPF<D$B ;[0&G6g C2F0tr| public FileAccessI() throws IOException ~oD8Rnf { SW?p?< this("",0); E
l&h;N } P`SnavQBt /!&R9!6
: ]]iPEm"@ public FileAccessI(String sName,long nPos) throws IOException X" R<J#4 { mxG ]kqi oSavedFile = new RandomAccessFile(sName,"rw"); /!xF?OmVd this.nPos = nPos; +C{p%`< oSavedFile.seek(nPos); gUax'^w;V; } U8QX46Br V6a``i] Q5+_u/ public synchronized int write(byte[] b,int nStart,int nLen) <,%:
{ `iG,H[t+j int n = -1; VM=+afY5M try{ oR#:NtX@ oSavedFile.write(b,nStart,nLen); '\ DSTr:N n = nLen; _7)F
? } %b!-~
Y. catch(IOException e) '3(l-nPiG^ { ,TC;{ $O5 e.printStackTrace (); e;95a } xK%= $0Yh!L ?\ 3/6/G}s return n; t!;/Z6\Pb } RMYP" -e@! $ChK]v
6C } }-<zWI{p >`T5]_a ]> !<G8=N /* h1"zV6U **SiteInfoBean.java J{"kw1Lu */ b!>\2DlyJ package NetFox; .w?
.ib( 3TuC+'`G \k8rxW public class SiteInfoBean { keAcKhj }E^S]hdvz X=X\F@V:u private String sSiteURL; //Site's URL $ItF])Bj5N private String sFilePath; //Saved File's Path HL{$ ^l#v private String sFileName; //Saved File's Name q 2?X"! private int nSplitter; //Count of Splited Downloading File 6vzk\n \>/M .2 HRa@ public SiteInfoBean() rp34?/Nz {//nSplitter的缺省值为5 $6>?; //default value of nSplitter is 5 6gO9 MQY this("","","",5); GJ(d&o8 } CZ{k@z`r ` (4pu6uT XR+3j/zEQ public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) +FFG#6e { 4jmK]. sSiteURL= sURL; S5=Udd" sFilePath = sPath; 4N?v
sFileName = sName; rJfqA@ this.nSplitter = nSpiltter; *gsAn<
{y^3> 7 =d;Vk } !cEG}(|h $A\m>*@ 8%{q%+ public String getSSiteURL() !UBO_X%dz { V1=*z return sSiteURL; =H]F`[B= } vxlOh.a|/L wzcai
0y* USML~]G
z public void setSSiteURL(String value) v[k5.\No { m@xi0t sSiteURL = value; oUDVy_k } |VH!)vD !|wzf+V eOlKbJU public String getSFilePath() |?m` xO { tV;%J4E' return sFilePath; HaNboYW_K } /)|X.D v@
C,RP9 7()?C}Ni- public void setSFilePath(String value) h+UnZfm { jh ez sFilePath = value; >%b\yl%0 } SqPtWEq@P Sq]pQ8 jB$SUO`* public String getSFileName() g;p)n { H3/caN: return sFileName; 1cN')" } VAQ)Hc] h=VqxGC& dXvt6kF public void setSFileName(String value) 4)-)# `K { nY-* i!H sFileName = value; JyBp-ii } FVWfDQ$&v [`fI:ao| &vUq}r%P public int getNSplitter() 'JmBh@A { qojXrSb"y return nSplitter; w; TkkDH } NC23Z0y +JdZPb oY9FK{ public void setNSplitter(int nCount) GY!C|7kN { !|{IVm/J nSplitter = nCount; mNmUUj9z } {aq9i } :>
-1'HC nL`9l1 I`B'1"{ /* iDb;_? **Utility.java xp \S2@< */ u</8w&! package NetFox; I+?hG6NM rs8\)\z B&KL2&Z~Pq public class Utility { {")\0|2\x GlYly5F '?Bg;Z'L % public Utility() )najO*n { y=N"=Z ,{}#8r` +* }7/e8 O2 } UGKaOol. ?bX //线程睡眠 ~5aE2w0K public static void sleep(int nSecond) lJ { HOW7cV'X try{ o
\L!(hm Thread.sleep(nSecond); S>:,z}i } =]>%t] catch(Exception e) 4*H"Z(HP { >%%=0!,yX e.printStackTrace (); X T>('qy } *>
3Qd7 } o+?@5zw-& htJuGfDx1 //日志 4jwu'7Q public static void log(String sMsg) =7/-i { =
1|"- System.err.println(sMsg); [Eq<":) } %_)zWlN |"7Pv
skT S3\jcgrS public static void log(int sMsg) Fz"ff4Bx [ { f05d ; System.err.println(sMsg); zmFws-+A } 4MvC]_& } Ej(2w Q h[Tk;h @'jfKW /* -;c **TestMethod.java )C]x?R([m */ <e"J4gZf& package NetFox; c[(Pg% n~r 9!m$< wq0aF"k public class TestMethod { N +Sq}hI s;.=5wcvi? R, 0Oq5 public TestMethod() $Xf (^K { ///xx/weblogic60b2_win.exe G2Qjoe`Uc try{ DZ`k[Z.VZ SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); %efGt6& //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); " ~Q*XN2 SiteFileFetch fileFetch = new SiteFileFetch(bean); d0UZ+ RR# fileFetch.start(); knHv?# } ^X1wI9V catch(Exception e){e.printStackTrace ();} &d^=siL %$X\" Xa,&ef&q } ^X?D#\ Ie_I7YJ g:~+Pe public static void main(String[] args) @6MAX" { W
kkxU.xXE new TestMethod(); mb1IQ & } xy^1US,L1 } vOT*iax0 点击下载更多相关资料
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