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/* XF$C)id2p **SiteFileFetch.java Zj<T#4?8 */ Q\z*q,^R package NetFox; |Z/ySAFM import java.io.*; &boBu^,94 import java.net.*; q.X-2jjpx: Zj^H3h Ek.j@79 public class SiteFileFetch extends Thread { Z,&ywMm/G 5LK>n- ]-`{kX SiteInfoBean siteInfoBean = null; //文件信息Bean =f p(hX" long[] nStartPos; //开始位置 g?+P&FL#I long[] nEndPos; //结束位置 ?{dno= FileSplitterFetch[] fileSplitterFetch; //子线程对象 +]_} \ long nFileLength; //文件长度 [(K^x?\Y0' boolean bFirst = true; //是否第一次取文件 dk ?0r boolean bStop = false; //停止标志 ,J#5Y. File tmpFile; //文件下载的临时信息 x[kdQj2[& DataOutputStream output; //输出到文件的输出流 7I
8vP)qy8 //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) ljCgIfZ_4 public SiteFileFetch(SiteInfoBean bean) throws IOException w/<hyEpxg { n#fg7d% siteInfoBean = bean; >y@w-,1he //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); K&h|r`W( tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); ^YZ#P0 y if(tmpFile.exists ()) lqs_7HhvRS { /4f;Niem bFirst = false; <Jk|Bmw; read_nPos(); i\'N1S<D } #>V;ZV5" else _8>"&1n { 334*nQ nStartPos = new long[bean.getNSplitter()]; wDG4rN9x nEndPos = new long[bean.getNSplitter()]; KKzvoc?Bt } RinRQd btE+.V ro{MDs Cu:-< } h^)2:0#{I dd+).* xVPGlU public void run() b6(yyYdF { BkF[nL*| //获得文件长度 G~Sfpf //分割文件 ~eP2PG //实例FileSplitterFetch ;D7jE+ //启动FileSplitterFetch线程 A!~o?ej //等待子线程返回 g/J!U8W" try{ @wPmx*SF if(bFirst) zkOgL9
(_8 { =EJ"edw]%0 nFileLength = getFileSize(); \4[Ta,;t if(nFileLength == -1) {1+H\(v { L5W>in5( System.err.println("File Length is not known!"); $9~1s/(' } @:@rks& else if(nFileLength == -2) `4qKQJw { yiq#p"Hs System.err.println("File is not access!"); :KLD~k7yA( } IY&a! else ;z>YwRV {
"gz;Q for(int i=0;i<nStartPos.length;i++) ;~J~g# { _<7FR:oBZ nStartPos = (long)(i*(nFileLength/nStartPos.length)); \zUsHK?L"t } NC}#P<U for(int i=0;i<nEndPos.length-1;i++) u|c+w)a { -Me\nu8(RF nEndPos = nStartPos[i+1]; A.b#r[ } ^xwFjQXx nEndPos[nEndPos.length-1] = nFileLength; (Wqhuw!u } wW4S@m } i]z
i[Zo$ h(-&.Sm")H !)=o,sVA //启动子线程 CmOb+:4@K fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; I1~g?jpH for(int i=0;i<nStartPos.length;i++) ;GSJnV { 2LU'C,o? fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), M\f0
=`g siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), ?
h%+2 nStartPos,nEndPos,i); =.a ]?&Yyh Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); M6sDtL9l fileSplitterFetch.start(); s|'L0` <B } (/U1J // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), @\?f77Of6 siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); 3D0I5LF& // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", z<>_*Lfj nEndPos = " + nFileLength); ^@2Vh*k // fileSplitterFetch[nPos.length-1].start(); #Au&2_O b*KZe[#M1 W\7*T1TDj //等待子线程结束 v_0!uT5~NE //int count = 0; KoJG!Rm //是否结束while循环 r
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(T! boolean breakWhile = false; Tt|6N*b' *
U4:K@y sBnPS[Oo while(!bStop) *lAdS]I { <*(R+to^d write_nPos(); @`D6F;R Utility.sleep(500); lv*uXg.k^ breakWhile = true; 9,CC1f P;&p[[7 N~jQ!y for(int i=0;i<nStartPos.length;i++) p%1m&/`F { [!mjUsut* if(!fileSplitterFetch.bDownOver) 1.uQ(>n { ($>0&w breakWhile = false; ;7k7/f: break; >>zoG3H! } RzQS@^u*F0 } QO k"UP if(breakWhile) zP}v2 break; )6^xIh w.p'Dpw t8 "-zd8 //count++; "lf3hWGw //if(count>4) jqWvLBU! // siteStop(); ^ZUgDQduc } ~+yo;[1Yc GTl (i*
Els= :4 System.err.println("文件下载结束!"); [uQZD1<q } J94YMyOo catch(Exception e){e.printStackTrace ();} d|RmU/) } >:&p(eu)L0 GQq'~Lr5 LB7I`W //获得文件长度 v^fOT5\ public long getFileSize() lG>e6[Wc { :0/o?'s int nFileLength = -1; b]?;R try{ x)ZH;) URL url = new URL(siteInfoBean.getSSiteURL()); RLNuH2y; HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); .6o y>4 httpConnection.setRequestProperty("User-Agent","NetFox"); }F6b ] G| oG: Tk&9Klo int responseCode=httpConnection.getResponseCode(); %nf=[f if(responseCode>=400) g8A{aHb1} { C)p<M H< processErrorCode(responseCode); %5?-g[ return -2; //-2 represent access is error B
RjKV } 4^_Au^8R( d ovwB`5 ^l&4UnLlc String sHeader; XYF~Q9~ VQMd[/ }A/&]1GWk for(int i=1;;i++) 6F/
OlK< { jYID44$ //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); k+GnF00N^8 //Utility.log(in.readLine()); bI6wE'h sHeader=httpConnection.getHeaderFieldKey(i); 7Sq{A@ET if(sHeader!=null) +{ !t~BW { cG!2Iy~lA if(sHeader.equals("Content-Length")) ]f-'A>MC { 00a<(sS; nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); #'J7Wy break; L$c%u } f?^Oy!1] } y"p-8RVk{ else PFgjWp"Y break; l'".}6S } QYw4kD} } >E ;o" catch(IOException e){e.printStackTrace ();} edk9Qd9 catch(Exception e){e.printStackTrace ();} T-2p`b}hW {)9HS~e T N<"6=z@w+ Utility.log(nFileLength); RdvTtXg 6ri?y=-c c&?a,fpb return nFileLength; m3Z}eC8LK } r9a!,^}F &t|V:_?/x AYu'ptDNr //保存下载信息(文件指针位置) !2U7gVt"* private void write_nPos() Mth`s{sATa { @j2*.ee try{ }rA+W-7 output = new DataOutputStream(new FileOutputStream(tmpFile)); ~K$"PKs3 output.writeInt(nStartPos.length); $0S#d@v} for(int i=0;i<nStartPos.length;i++) 4\SBf\ c { ) wo2GF // output.writeLong(nPos); [Ro0eH output.writeLong(fileSplitterFetch.nStartPos); ~EWfEHf*BJ output.writeLong(fileSplitterFetch.nEndPos); t,1! `/\ } 5QFXj)hR+4 output.close(); {e[pSD6 } AH87UkNL catch(IOException e){e.printStackTrace ();} LO} :Ub catch(Exception e){e.printStackTrace ();} 2{]S_. zV } .Jat^iFj0 Q()RO*9 -1r &s //读取保存的下载信息(文件指针位置) QD;f~fZ private void read_nPos() (6#yw`\ { MD
?F1l"}% try{ X)iWb(@k"7 DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); B6'%J int nCount = input.readInt(); LVFsd6:h nStartPos = new long[nCount]; uyRA`<&w nEndPos = new long[nCount]; 7}tZ?vD for(int i=0;i<nStartPos.length;i++) s!;VUr\ { pg}+lYGP nStartPos = input.readLong(); .UhBvHH nEndPos = input.readLong(); U>_\ } ,dj*p,J input.close(); 6n6VEwYj } /mBBeg^a catch(IOException e){e.printStackTrace ();}
6:@t=C catch(Exception e){e.printStackTrace ();} e(; `9T } 'UvS3]bSYW
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-P private void processErrorCode(int nErrorCode) R4~zL!7; { Wt)SdF=U/ System.err.println("Error Code : " + nErrorCode); ZH$sMh<xg } 8} ?Y;>s\ )lDIzLp p-'6_\F.Ke //停止文件下载 NzeI/f3K5 public void siteStop() 'f?&EsIV? { eFj6p< bStop = true; _z(5e for(int i=0;i<nStartPos.length;i++) o&XMgY~ fileSplitterFetch.splitterStop(); w^'?4M! .xLF}{u ,7fc41O3V } '=Kof1 } C/CfjRzd //负责部分文件的抓取 #?$'nya*u **FileSplitterFetch.java X#kjt)W */ ZP63Alt package NetFox; u_6BHsU _+Jf.n20 |1QbO`f/F import java.io.*; dp[w?AMhM9 import java.net.*; B/sBYVU Id.Z[owC`Y rxy{a public class FileSplitterFetch extends Thread { |:e|~sism $nfBvf ^L8Wn6s' String sURL; //File URL io9xI3{ long nStartPos; //File Snippet Start Position # +QWi0B long nEndPos; //File Snippet End Position
InPy:} int nThreadID; //Thread's ID jqX@&}3@ boolean bDownOver = false; //Downing is over >Z2,^5P{ boolean bStop = false; //Stop identical /\-2l+y>J FileAccessI fileAccessI = null; //File Access interface =, C9O 3u?`q%Y-e FfYd+]+? public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException E &];>3C { s=nVoc{Yt this.sURL = sURL; "'F;lzq this.nStartPos = nStart; (
*9Ip this.nEndPos = nEnd; ,\S pjE nThreadID = id; 0 .FHdJ< fileAccessI = new FileAccessI(sName,nStartPos);//定位 1~R$$P11[9 } R*Xu(89 0tW<LR-}E Pn+IJ=0Y public void run() &'huS?gA9 { U50s!Zt45 while(nStartPos < nEndPos && !bStop) $/, BJ/9 { Y[iDX# 62MRI @QVqpE<| try{ oTF^<I-C URL url = new URL(sURL); _^6|^PT. HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); @3-,=x httpConnection.setRequestProperty("User-Agent","NetFox"); a)_rka1( String sProperty = "bytes="+nStartPos+"-"; l- 1]w$
y httpConnection.setRequestProperty("RANGE",sProperty); SY$J+YBLM Utility.log(sProperty); ol$2sI=.s >&<<8Ln p| \%:# InputStream input = httpConnection.getInputStream(); {*?sVAvj //logResponseHead(httpConnection); @q> ktE_ GP[6nw_'^ <DeKs?v byte[] b = new byte[1024]; Ue{vg$5|| int nRead; X!7VyE+n while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) ] Wx>)LT { HBh` 2Q nStartPos += fileAccessI.write(b,0,nRead); mFqSD //if(nThreadID == 1) " K 8&{= // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); e}'#Xv } ^])e[RN7?n zd*3R+>U'> ocIt@#20K Utility.log("Thread " + nThreadID + " is over!"); #cj\~T.,, bDownOver = true; .1.J5>/n //nPos = fileAccessI.write (b,0,nRead); $=PWT-GIR } Qy=HrL]x catch(Exception e){e.printStackTrace ();} \Y!T>nWn)I } lX98"} } ]a$Wxvgq [F/^J|VMV ;dqk@@O"( //打印回应的头信息 J Q)4}t public void logResponseHead(HttpURLConnection con) JkSdLj { yaH
Trh% for(int i=1;;i++) -ajM5S=d* { IPl@ DH String header=con.getHeaderFieldKey(i);
SwdC, if(header!=null) I#|ocz //responseHeaders.put(header,httpConnection.getHeaderField(header)); .q0218l:dF Utility.log(header+" : "+con.getHeaderField(header)); .O5LI35, else r-RCe3%g% break; w=f0*$ue+w } |Z`M*.d+ }
gd337jw Sao>P[#x *:=];1O public void splitterStop() UGhW0X3k { (;;J,*NP bStop = true; pOqGAD{D$ } .MDYGWKt nE/=:{~Ws uy/y wm/?= } .A3DFm3 t gw_|C|!P JN9^fR09G /* XzlKP;r0 **FileAccess.java r1i$D *//文件访问(定位,写) `IEq@Wr#$! package NetFox; %ZujCZn import java.io.*; x}tKewdOSe <jbj/Q )" `1nRcY public class FileAccessI implements Serializable{ Eo%UuSi +yzcx3< //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 Tr}R`6d$ RandomAccessFile oSavedFile;
MKU7fFN. long nPos; u-m %=2 [NYj.#,oR IE&_!ce public FileAccessI() throws IOException JXpoCCe { >|wKXz this("",0); - #3{{ } y L*LJ \r)%R5_CQ h^}_YaT\ public FileAccessI(String sName,long nPos) throws IOException yZq?B { 's)fO#
oSavedFile = new RandomAccessFile(sName,"rw"); G49Ng|qn this.nPos = nPos; )T>8XCL\} oSavedFile.seek(nPos); 82lr4 } \X&]FZ(* <5dH *K KwS`3 6: public synchronized int write(byte[] b,int nStart,int nLen) zQ ,f5x { m&Lt6_vi int n = -1; Z.!g9fi8> try{ egfi;8]E oSavedFile.write(b,nStart,nLen); Osnyd+dJY n = nLen; E]NY
(1 } f%c06Un= catch(IOException e) "X`RQ6~]> { r,5-XB e.printStackTrace (); Q~phGD3!~ } +9RJ%i&Ec Bb~5& @M|N l{8CISO* return n; `%|u! } qYx!jA]O B$ui:R/ t ;TtaH } 0A.PD rM: 2xDQ:=ec J==}QEhQ{ /* ?FN9rhAC **SiteInfoBean.java j~epbl)pC */ B22b&0 package NetFox; [ a@B
=E ' PELf
P8 >)LAjwhBp public class SiteInfoBean { a2o.a2
>rKhlUD zhX;6= X2 private String sSiteURL; //Site's URL 7{-@}j` private String sFilePath; //Saved File's Path X<Z(]`i private String sFileName; //Saved File's Name _
\l
HI private int nSplitter; //Count of Splited Downloading File K5{{:NR$ QP:9%f>= .:8[wI_f public SiteInfoBean() pw=F' Y@N
{//nSplitter的缺省值为5 hcyn
//default value of nSplitter is 5 }wfI4?}j} this("","","",5); ^p,3)$ } }t\
10nQ ? ~,JY gwiR/(1 public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) Tv\HAK<N { ~
7}] sSiteURL= sURL; /_q#ah sFilePath = sPath; M|k&TTV sFileName = sName;
vO]J]][ this.nSplitter = nSpiltter; to'j2jP ,ijW(95{k )A"jVQjI%w } PK+ x6]x gKWzFnW
uN9e:; public String getSSiteURL() ailG./I+ { +#~O'r]%GG return sSiteURL; dMJ!>l>2 } jB!W2~Z Y''6NGf a%E8(ms37y public void setSSiteURL(String value) OF8WDo` { 12lEs3 sSiteURL = value; 4:U0f;Fs } dKm`14f]@G Aq"PG}Ic yX'IZk#_L public String getSFilePath() KaW~ERx5 { Rboof`pVt return sFilePath; ,Aj }]h\L } wu 2:'y>n #EG?9T 1i3V!!r public void setSFilePath(String value) /'4Q{8.a { EjSD4 sFilePath = value; yp p 4L|R }
4{Udz! =&2$/YX0D MtUY?O.P2 public String getSFileName() 6.'$EtH { E~RV1) return sFileName; Sph*1c(R } *Tp]h 0 = /Wu'gG) @+&'%1 public void setSFileName(String value) 4gOgWBv { | 3giZ{ sFileName = value; | ]# +v@ } C_G1P)k IY)5.E
_ SKR;wu public int getNSplitter() TV=c,*TV { K2HvI7$- return nSplitter; ZoxS*Xk } X2^_~<I{, N@()F&e o,FUfO}F public void setNSplitter(int nCount) G3dhM#! { mgVML&^ nSplitter = nCount; f=m/
-mAA } o?wt$j- } l3p3tT3+ &SmXI5>Bo0 U:n*<l-k} /* EkZjO Ci **Utility.java K]<u8eF */ b[srG6{ & package NetFox; o1k#."wHr OQFi.8 F;kvH public class Utility { KjOi(YUnq7 @9vvR7{P ffk4mhH public Utility() wyw <jH { tS<h8g_ XWtiwf'K nY0sb8lZJ } hVUIBJ/5(- WNF9#oN|oT //线程睡眠 $XGtS$ public static void sleep(int nSecond) iBoEZEHjw { <hv7s,i try{ lFfXWNb Thread.sleep(nSecond); Dm%%e o } s.:r;%a catch(Exception e) aZKXD! 4 { J3B.-XJ+n e.printStackTrace (); VR4%v9[1 } y|sma;D } {mSJUK?TKl 8lwM{?k$ //日志 ^ ulps**e public static void log(String sMsg) K-(;D4/sQE { d>!p=O`>{q System.err.println(sMsg); {/ &B!zvl } h8=h >W- Qra> }e%* RmO yGSO public static void log(int sMsg) 4seciz0? { Rp/-Pv
System.err.println(sMsg); -H\,2FO } O2 v. } FH*RU1Z ]XUSqai hYb9`0G"2 /* C`4gsqD;Z **TestMethod.java d(S}NH */ 10MU-h.) package NetFox; \hbiU] |ym%|
B H/J<Pd$p public class TestMethod { U3F3((EYJ ^~l $&~
maDz W_3 public TestMethod() *#2Rvt*Ox { ///xx/weblogic60b2_win.exe O,mip try{ Of`c`-<j SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); ]k*1KP //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); ,4Y*:JU4 SiteFileFetch fileFetch = new SiteFileFetch(bean); [6RfS fileFetch.start(); $bGD%9
z } I=[cZ;t catch(Exception e){e.printStackTrace ();} &&PgOFD SRCOs1(EK9 %&<W(|U1< } 4*M@]J " p4wr`"Zz V`k8j-*s public static void main(String[] args) I7mG/ { IKcKRw/O$ new TestMethod(); a+?~;.i~ } n93zD*;5 } )(bxpW 点击下载更多相关资料
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