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/* -`RJk( **SiteFileFetch.java s%:fB( */ 5[3hw4 package NetFox; d!d
3r W;A import java.io.*; ^Y&Cm.w import java.net.*; ^d"J2n,7L oaKf{$vg V":BAn public class SiteFileFetch extends Thread { S ~_% I45A$nV#Q {)[i\=,`{ SiteInfoBean siteInfoBean = null; //文件信息Bean BOWTH{KR<< long[] nStartPos; //开始位置 r:q#l~;^ long[] nEndPos; //结束位置 q!,do2T FileSplitterFetch[] fileSplitterFetch; //子线程对象 wx!*fy4hL long nFileLength; //文件长度 QA3l:D}u boolean bFirst = true; //是否第一次取文件 zm:=d>D.. boolean bStop = false; //停止标志 *"5a5.`%, File tmpFile; //文件下载的临时信息 `%Ghtm * DataOutputStream output; //输出到文件的输出流 y"hM6JI MT5A%|H e //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) d3$<|mG$ public SiteFileFetch(SiteInfoBean bean) throws IOException yI%>
w4Z {
cjR.9bgn siteInfoBean = bean; SQ!lgm1bA //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); ]UI+6}r tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); t[maUy_A if(tmpFile.exists ()) >R:+ml { b[k 1)R" bFirst = false; GlZ9k-ZRF read_nPos(); [E^X=+Jnz } g-^m\>B else oD7H6\_ { -7$'* V9$ nStartPos = new long[bean.getNSplitter()]; F:g{rm[ nEndPos = new long[bean.getNSplitter()]; U,M,E@ } NQJqS?^W&M :6/OU9f/R #R8l"]fxr? L1xD$wl } iK]g3ew| ^zJ.W OW}A48X[+ public void run() StL[\9~: { gB(W`:[ //获得文件长度 ~
t
H s+ //分割文件 TxvPfU? //实例FileSplitterFetch kn"x[{d //启动FileSplitterFetch线程 jq]"6/xxb //等待子线程返回 GN9_ZlC try{ 9/M!S[N9 if(bFirst) ?>8zU;Aj { qtN29[x nFileLength = getFileSize(); I`TD*D if(nFileLength == -1) !S!03| { @qDrTH]5 System.err.println("File Length is not known!"); @,&m`qzd+ } @>@Nug2 else if(nFileLength == -2) QL2y,?Mz7 { 3R*@m System.err.println("File is not access!"); X-,y[ ) } LwPM7S~ * else cv4M[]U~ { 2S6EDXc for(int i=0;i<nStartPos.length;i++) =.oWg uzu { ws?s nStartPos = (long)(i*(nFileLength/nStartPos.length)); I0vnd7 } D,j5k3< # for(int i=0;i<nEndPos.length-1;i++) @>IjfrjV { ,rI
|+ nEndPos = nStartPos[i+1]; A4FDR# } emB D@r nEndPos[nEndPos.length-1] = nFileLength; -ikuj } :"^<
aLj } PL$F;d UMwMXmZNJ ~ p.W*skD //启动子线程 k#5e:VOb fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; a.IF%hP0xo for(int i=0;i<nStartPos.length;i++) Y^Q|l%Qrb { ?1:/
6 fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), SQU%N siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), ]~Vu-@
/} nStartPos,nEndPos,i); #ljg2:I+ Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); 9:i,WJO fileSplitterFetch.start(); (y=o]Vy } (I
ds<n" // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), K=?F3tX^ siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); Ju7C?)x // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", $cK
B+} nEndPos = " + nFileLength); QeJ.o.m{ // fileSplitterFetch[nPos.length-1].start(); _1> 4Q% }!]x|zU.= yO;C3q //等待子线程结束 ENWB|@B //int count = 0; wV&f|JO0+ //是否结束while循环 doO
Ap9% boolean breakWhile = false; <lmJa# So*Wk " 0o$HC86w while(!bStop) >DUE8hp;< { Hq\E06S@ write_nPos(); M|#5gKXd Utility.sleep(500); Z) i1?# breakWhile = true; ([CnYv x<j"DS}S)D ?U/Wio$@ for(int i=0;i<nStartPos.length;i++) `6N-MsP { Y+u-J4bj if(!fileSplitterFetch.bDownOver) UxcDDa/j2T { {dA
~#fW< breakWhile = false; >_aio4j}r break; ,V]A63J } RvS q KW8 } sMS9!{A if(breakWhile) Wj j2J8B break; ;#yu"6{ QS [B "gvw0) //count++; h @,e`Z //if(count>4) IO!1|JMr6 // siteStop(); )=E~CpKV } ,J(5@8(>a 9^QYuf3O wz*A<iU System.err.println("文件下载结束!"); #}!>iFBcH } r d6F"W catch(Exception e){e.printStackTrace ();} Ls>u`hG } 8yWu{'G 5\ w=(c9A .p(6' TYnI //获得文件长度 Q_kT}6#(J= public long getFileSize() Z0ncN]) { =tc`:!$ int nFileLength = -1; _:gGD8 try{ S
$_Y/x URL url = new URL(siteInfoBean.getSSiteURL()); $EQT"ZX>%i HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); [|[sYo httpConnection.setRequestProperty("User-Agent","NetFox"); mfngbFa1 |J<pLz ~1=.?Ho int responseCode=httpConnection.getResponseCode(); ?z@v3(b[ if(responseCode>=400) % O&m#)| { sUbz)BS#. processErrorCode(responseCode); S#h'\/S return -2; //-2 represent access is error (~7m"? } Z<N&UFw7QJ P~\a)Szy ].-J. String sHeader; up&N CX d{2y/ Im?= e for(int i=1;;i++) tt7PEEf { gVa+.x] //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); f3zfRhkIk //Utility.log(in.readLine()); c}IX" sHeader=httpConnection.getHeaderFieldKey(i); Tr+h$M1_Ja if(sHeader!=null) S!jF:Uc { &Mhv XHI if(sHeader.equals("Content-Length")) [+%d3+27 { {1Ju}=69 nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); 1 ;\]D9i break; ']ITuP8 } KUp } *>aZc:: else U0h)pdo break; T2:oWjC3$ } 8tLT'2+H# } f@!
fW& catch(IOException e){e.printStackTrace ();} i'W_;Y} catch(Exception e){e.printStackTrace ();} <78$]Z2we Ha)3i{OM 3?.1~ "-J Utility.log(nFileLength); I&pr_~. !F+|Y"c U|Bsa(?nx return nFileLength;
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} ;wJ7oj< smfG,TI !2zo]v4? //保存下载信息(文件指针位置) Uz6{>OCvk| private void write_nPos() c~gNH%1XN { 'v\1:zi try{ &/>;LgN output = new DataOutputStream(new FileOutputStream(tmpFile)); 0" U5oP[ output.writeInt(nStartPos.length); "UQr :/ for(int i=0;i<nStartPos.length;i++) Gur8.A;Y { V[o7Jr~ // output.writeLong(nPos); :DtZ8$I`]C output.writeLong(fileSplitterFetch.nStartPos); xSpMyXrQ output.writeLong(fileSplitterFetch.nEndPos); cWN d<=Jp } '}jf#C1$c output.close(); BIxV|\k } h8f!<:rTS catch(IOException e){e.printStackTrace ();} O.@g/05C catch(Exception e){e.printStackTrace ();} ,wtFs!8 } 5^/,aI L6|Hgrj -u fL ~1 //读取保存的下载信息(文件指针位置) Qg'c?[~W@ private void read_nPos() +
,@ FxZl { FU_fCL8yA try{ K0tV'Ml#" DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); PD6MyW05%9 int nCount = input.readInt(); F(Lb8\to\M nStartPos = new long[nCount]; i{o#3 nEndPos = new long[nCount]; 9#v-2QY for(int i=0;i<nStartPos.length;i++) @v>l[6]>^ { 3jvx2 nStartPos = input.readLong(); N]B)Fb nEndPos = input.readLong(); y,MPGW_ } 0CPxIF& input.close(); _Zh2eXWdjM } qBT_!
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catch(IOException e){e.printStackTrace ();} KMUK`tbaI catch(Exception e){e.printStackTrace ();} u@<Pu@?xm } yC0C`oC *8z"^7?^= 6ayy[5tW private void processErrorCode(int nErrorCode) U
z"sdi { ?n)Xw)] System.err.println("Error Code : " + nErrorCode); Z:K+I+:t } $z*@2Non >BBl7 cppL0myJ //停止文件下载 7$!yfMttu public void siteStop() z8IPhE@ { ^;.T}c%N bStop = true; 4w'lu"U for(int i=0;i<nStartPos.length;i++) `,+#! ) fileSplitterFetch.splitterStop(); Z;#%t. "[k1D_PZ ful#Px6m } FC6x Fg^ } x
Sv-;!y //负责部分文件的抓取 <>%,}j
9 **FileSplitterFetch.java vkJ)FEar */ M)L/d_4ka package NetFox; Kl{-z X zG_p"Z7, _}D%iJg# import java.io.*; KE<kj$
import java.net.*;
[>f]@> <?YA,"~ i\)3l%AK]T public class FileSplitterFetch extends Thread { gw^'{b m[spn@SF ~h!
13! String sURL; //File URL bHE7yv [ long nStartPos; //File Snippet Start Position #jBN?Z# long nEndPos; //File Snippet End Position )s)_XL int nThreadID; //Thread's ID [[WF0q boolean bDownOver = false; //Downing is over v8m`jxII64 boolean bStop = false; //Stop identical w~|1Wd<v FileAccessI fileAccessI = null; //File Access interface Pz%~ST M(enRs3`O ^
q?1U?4 public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException ^/toz).Q { 8YX)0i' this.sURL = sURL; 3-C\2 this.nStartPos = nStart; Ja|{1&J. this.nEndPos = nEnd; px=]bALU nThreadID = id; 2/B)O)#ls fileAccessI = new FileAccessI(sName,nStartPos);//定位 [} -3PpF } xzm@
v( )6-9)pH@) 4r&f%caU public void run() oh~:, { M&KyA while(nStartPos < nEndPos && !bStop) +Rwx%= { wfR&li{ or 2|O#= /:Lu_)5 try{ E7nFb:zlV URL url = new URL(sURL); _w!a`w*3 HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); ;hHi@Z9 httpConnection.setRequestProperty("User-Agent","NetFox"); 2 0tO#{Li String sProperty = "bytes="+nStartPos+"-"; aC!EWgwW[ httpConnection.setRequestProperty("RANGE",sProperty); .WX,Nd3@ Utility.log(sProperty); ^:KO_{3E ab.tH$:< c?E{fD"Fc3 InputStream input = httpConnection.getInputStream(); rjk ( X|R* //logResponseHead(httpConnection); 0fArF* oehaQ#e 1/;o byte[] b = new byte[1024]; vWjnI*6T# int nRead; X%}nFgqQ while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) V5p0h~PK { jVWK0Zba nStartPos += fileAccessI.write(b,0,nRead); qf#)lyr<D6 //if(nThreadID == 1) poT&-Ic[ // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); (=u'sn:s } 94/BG0 )8,|-o= eSfnB_@x2 Utility.log("Thread " + nThreadID + " is over!"); Y@uh[aS! bDownOver = true; )C~9E 5E //nPos = fileAccessI.write (b,0,nRead); Q@S-f:! } $IX\O catch(Exception e){e.printStackTrace ();} O
)d[8jw" } F #`=oM$5 } fjG&`m#" wTc)S6%7 j:,9%tg //打印回应的头信息 91Z' public void logResponseHead(HttpURLConnection con) =(o']ZaaA { d`y!cu2} for(int i=1;;i++) n3KI+I%nQ { ZZxk]D< String header=con.getHeaderFieldKey(i); :"1|AJo) if(header!=null) ]a'99^?\ //responseHeaders.put(header,httpConnection.getHeaderField(header)); )[Z!*a m Utility.log(header+" : "+con.getHeaderField(header)); lioc`C: else Dw6 fmyJ: break; 0~Gle: } eiVC"0-c} } 12UD19! P8Qyhc Ib=x~za@n public void splitterStop() qv*7K@ { @N@F,~[RR2 bStop = true; 3gEMRy*+ } 9=`W p6Gmn p@
NaD=9 pzZk\-0R } oUZoj2G1 2JGL;U$ EgjR^A1W2 /* XvTCK>1 **FileAccess.java hX:"QXx *//文件访问(定位,写) \ 0W!4D
package NetFox; zUJZ`seF import java.io.*; <y.]ImO p>w]rE:} $g0+,ll[6 public class FileAccessI implements Serializable{ <ABX0U[* Ifc]K? //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 $sHP\{ RandomAccessFile oSavedFile; )!:sFa
1 long nPos; c2nKPEX&5 zAzP,1$? mHc>"^R public FileAccessI() throws IOException $;N* c H~ { yw-8#y this("",0); 'a6<ixgo0 } O^Q7b7}y nI.x :Qt public FileAccessI(String sName,long nPos) throws IOException n{*D_kM(H { "*1f;+\ oSavedFile = new RandomAccessFile(sName,"rw"); {^a36i this.nPos = nPos; D,v U oSavedFile.seek(nPos); "\C$ } Yb3mP!3q8Z GzXUU@p ^!<dgBNj public synchronized int write(byte[] b,int nStart,int nLen) a8k; (/ { ~}EMk 3 int n = -1; \wcam`f try{ {%lXY Myu oSavedFile.write(b,nStart,nLen); W]M)Q}:Y n = nLen; {9Y+.46S } ?'86d_8 catch(IOException e) 3<? { X|f7K e.printStackTrace (); ]V l]XT$Um } vX0f,y
xw^R@H zi R5:d3 return n; 6tHO!`}1 } M5nWVK7c )c n+1R (wIzat } N'r3`8tS 3s\.cG?`r 3$.deYa$R /* 0R{dNyh{ **SiteInfoBean.java ('wY9kvL& */ &qpr*17T package NetFox; 1tTgP+ An;MVA 5pr"d@. public class SiteInfoBean { +/,icA}PI @SZM82qU2z {^(ACS9mL private String sSiteURL; //Site's URL ?0?
R private String sFilePath; //Saved File's Path Q_* "SRz private String sFileName; //Saved File's Name L
pR''`2BT private int nSplitter; //Count of Splited Downloading File p&+;w 5^']+5_vb *.L81er5~ public SiteInfoBean() kt`nbm|aw {//nSplitter的缺省值为5 ];.pK //default value of nSplitter is 5 '!l1=cZD this("","","",5); 4wC+S9I#E^ } l^ZI* z7N /VmR<C?h zi`b2h public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) rSXh;\MfB4 { 'RRmIx2X sSiteURL= sURL; -~?J+o+Pr" sFilePath = sPath; C<KrMRWh^ sFileName = sName; /}Jj this.nSplitter = nSpiltter; ono4U.C9 PH"n{lW.T 5>BK%` } >2bKSh XGP6L 0j 'cY` w public String getSSiteURL() Y3Vlp/"rB" { $)3%U?AP return sSiteURL; O@p]KSfk } /|xra8?H[ J7r|atSk fS~;>n%R public void setSSiteURL(String value) !9Aaj<yxm { T&Lb<'f sSiteURL = value; ^i:`ZfA# } (aD_zG=k5 5:'hj$~|\1 B}PIRk@a1 public String getSFilePath() 8\{^|y9- { X]P:CY return sFilePath; zZVfj:i8 } z dO#0tN PRz/inru- _YcA+3ZL public void setSFilePath(String value) f=)2f= { (SKVuR%Jj sFilePath = value; -_`>j~ } @)Ofi j ABUSTf< {&"N%;`Q public String getSFileName() eImn+_ N3 { 0v9rv.Y" return sFileName; HttiX/2~ } `w]s;G[ y@\V+ Yo[;W
vu public void setSFileName(String value) qWmQ-|Py { YW{C} NA sFileName = value; N^3N[lD{ } Fd0%lnui P*cNh43U ;[fw]P n public int getNSplitter() s`0QA!G{- { rF]h$Z8o return nSplitter; } \ZaE~ } qi_Jywd:w D9z|VIw8 r#XT3qp$d public void setNSplitter(int nCount) ?M[ A7? { OoWyPdC+P nSplitter = nCount; .k,kTr$S } )I3NeKWz } ?Wz8[u e o pD5 0:+WO%z /* y- 1 pR **Utility.java j$+nKc$ */ TA{\PKA) package NetFox; g1jTy7g? b,CaWg WL'P)lI5 public class Utility { o
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o[VZ public Utility() V3"=w&2]K { 5=f|7yl KN* eM+!Y>8Y } K"r*M.P> X-wf:h?i //线程睡眠 8O38#{[S public static void sleep(int nSecond) kkQVNphc { [D!jv" try{ ~c&bH]cj Thread.sleep(nSecond); bFW =ylF9 } @7B$Yy# catch(Exception e) .C--gQpIv { (;q;E\Ejq e.printStackTrace (); zzyHoZJP }
OVV]x{ } NgY=&W, ll C#1 //日志 :53)Nv public static void log(String sMsg) nVi[ { /AW=5Ck- # System.err.println(sMsg); RRI"d~~F6 } v#!%GEg1r %T~ig[GstX v-PXZ'7~ public static void log(int sMsg) {|'E { ZSG9t2qlv System.err.println(sMsg); 9<>wIl*T` } `b^Ru+(dM } 'nwx9]q 9pX&ZjYP- T87m?a$ /* gntxNp[9T **TestMethod.java uB]b}"+l */ VSSu&Q package NetFox; Ba!J"b] *3?'4"B{8 Dp':oJC public class TestMethod { 2n|K5FR() !Ze5)g%H 4 XAQVq5 public TestMethod() sashzVwJ-= { ///xx/weblogic60b2_win.exe aXoVy&x= try{ jJ5W>Q1mK$ SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); K|Di1)7=/ //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); ;NHt7p8SE SiteFileFetch fileFetch = new SiteFileFetch(bean); RR]CW fileFetch.start(); WUh$^5W } h"/<?3{ catch(Exception e){e.printStackTrace ();} Zd')57{ ;t|Ii8Ne ^G.B+dG@`x } apu4DAy&8 c\Q7"!e nuw70*ell public static void main(String[] args) W#hj 1 { =,UWX3`f new TestMethod(); Y$?9Zkp> } tQBRA/ } , T8>}U( 点击下载更多相关资料
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