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/* Y<vsMf_U **SiteFileFetch.java #00k7y>OyD */ +@QN)ZwVy package NetFox; d0;$k, import java.io.*; */|Vyp- import java.net.*; },d`<^~ 9b/7~w. sL9,+ public class SiteFileFetch extends Thread { 7HpfHqJ7 <#hltPyh $p)7k SiteInfoBean siteInfoBean = null; //文件信息Bean 0
tZ>yR long[] nStartPos; //开始位置 @Y~R*^n"} long[] nEndPos; //结束位置 g@va@*|~d FileSplitterFetch[] fileSplitterFetch; //子线程对象 `o.DuvQ
E long nFileLength; //文件长度 I.M@we/bR} boolean bFirst = true; //是否第一次取文件 >z`^Q[ boolean bStop = false; //停止标志 33{(IzL0 File tmpFile; //文件下载的临时信息 FuiEy=+ DataOutputStream output; //输出到文件的输出流 |7K[+aK 4TBK:Vm5 //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) 2
f"=f^rf public SiteFileFetch(SiteInfoBean bean) throws IOException Zewx*Y| { d"1DE siteInfoBean = bean; qm.30 2 //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); fVU9?^0/)9 tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); }SdI _sLe if(tmpFile.exists ()) Hyw T { `ehZ(H} bFirst = false; 1;\A./FVv read_nPos(); jAa{;p"jU } =*icCng else A?DgeSm {
_e
]jz2j nStartPos = new long[bean.getNSplitter()]; 6O`s&T,t nEndPos = new long[bean.getNSplitter()]; PP{CK4 } %<g(EKl J H%^FF2 (6aSDx
Sc /D]V3|@E } 6N{Vcfq pzo9?/- U5 `h public void run() COE,pb17 { 4k
HFfc //获得文件长度 fQ\nK H~ //分割文件 i/&?e+i //实例FileSplitterFetch 6I$laHx? //启动FileSplitterFetch线程 d 6$,iw@>^ //等待子线程返回 K+0&~XU try{ 6 9 PTo if(bFirst) 73-*|@6 { p19[qy~. nFileLength = getFileSize(); N2?o6) if(nFileLength == -1) sHqs)@D { |Ef\B]Ns System.err.println("File Length is not known!"); Bs@!S? } -8L22t else if(nFileLength == -2) c)d*[OI8 { Z~g I ) System.err.println("File is not access!"); *V\z]Dy-[ } E%eTjvvxus else |H:JwxH { Xq3n7d. for(int i=0;i<nStartPos.length;i++) &GF|Rr8NXs { z7[TgL7 nStartPos = (long)(i*(nFileLength/nStartPos.length)); +d[A'&" } ~?V+^<P for(int i=0;i<nEndPos.length-1;i++) Q?f%]uGFQ { Oz\mIVC# nEndPos = nStartPos[i+1]; 9uXu V$. } 9Tgl/}q) nEndPos[nEndPos.length-1] = nFileLength; [DW}z } e&Z\hZBb } \9U4V>p g/)$-Z)Nu :$bp4+3> //启动子线程 c0J=gZiP fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; x=+R0ny for(int i=0;i<nStartPos.length;i++) k,EI+lC X { '}3m('u fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), -mSiZ siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), }E01B_T9z nStartPos,nEndPos,i); u/Os Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); Rw]4/ fileSplitterFetch.start(); Bg^k~NX% } $ae*3L>5M // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), PGT*4r21 siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); _3q% // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", =)56]ki} nEndPos = " + nFileLength); <O`yM2/pS // fileSplitterFetch[nPos.length-1].start(); @ljvTgZ(X
b>N)H OD,"8JF //等待子线程结束 9Fe(],AzF //int count = 0; vYh_<Rp5 //是否结束while循环 G;:D6\ boolean breakWhile = false; 4dDDi,)U ~|j :xM(i S.;>:Dd[K while(!bStop) wi#]*\N\9 { yOn +Y write_nPos(); @w1@|"6vF Utility.sleep(500); P]bq9!{1 breakWhile = true; m){.{Vn] N-x~\B! Qm|Q0u for(int i=0;i<nStartPos.length;i++) #A8d@]Ps { U @Il:\I if(!fileSplitterFetch.bDownOver) ,`7;S,f { =-M)2&~L~ breakWhile = false; j @c
fR break; 0phO1h]2S) } SnK j:|bV } !P7##ho0 if(breakWhile) r7tN(2;5 break; 20hF2V lFWN[`H {}?;|&_ //count++; |Rr^K5hmD //if(count>4) o.tCw\M$g // siteStop(); Rd5ni2-nve } =d/\8\4 Lc>9[!+# VjU;[ System.err.println("文件下载结束!"); <!.'"*2 } r`]&{0}23 catch(Exception e){e.printStackTrace ();} Q K0 } 0\tk/<w2 QN[-XQ>Xt _m!TUT8o //获得文件长度 gY AXUM, public long getFileSize() g-=)RIwm { $|v_ pjUu] int nFileLength = -1; rs01@ try{ Xtqjx@ye URL url = new URL(siteInfoBean.getSSiteURL()); &z;;Bx0s HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); M.K-)r, httpConnection.setRequestProperty("User-Agent","NetFox"); n{F$,a .O[RE_j z`-?5-a]I int responseCode=httpConnection.getResponseCode(); bS{7 *S if(responseCode>=400) wiWpzJz { DpIv <m] processErrorCode(responseCode); ! /Z{uy return -2; //-2 represent access is error u49zc9 } i^ 9PiP|U !j8h$+:K yp=Hxf String sHeader; %dTkw+J ~je#gVoUR %iWup: for(int i=1;;i++) &6A'}9Ch { D'aq^T' //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); ]=p@1 //Utility.log(in.readLine()); R}F0_. sHeader=httpConnection.getHeaderFieldKey(i); f[3DKA if(sHeader!=null) #Ag-?k { &?^S`V8R* if(sHeader.equals("Content-Length")) 0uzm@'^ { Efi@hdEV nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); |p J)w break; )/H=m7}1h } Ktg{-Xl } 7N "$~UfC else 9l2,:EQ* break; X3#/|> } *6~ODiB } ;cl\$TDL catch(IOException e){e.printStackTrace ();} _^Lv8a3(O catch(Exception e){e.printStackTrace ();} 6_/691 h+Km | ghm5g/ Utility.log(nFileLength); |du@iA]dP h)BRSs?v_D t3K7W2bz return nFileLength; {J q[N} } kf+]bV kH1hsDe|&y D/jB. //保存下载信息(文件指针位置) 9;s:Bo private void write_nPos() 2#l<L># { /]_T try{ -frmvNJ F output = new DataOutputStream(new FileOutputStream(tmpFile)); 7PO3{I output.writeInt(nStartPos.length); R%o:'-~ for(int i=0;i<nStartPos.length;i++) qEr2Y/:i" { }\}pSqW // output.writeLong(nPos); 1VK?Svnd output.writeLong(fileSplitterFetch.nStartPos); BL<.u output.writeLong(fileSplitterFetch.nEndPos); _x 'R8/ } Zpg/T K output.close(); |WH'aGG } 3}=r.\]U catch(IOException e){e.printStackTrace ();} PHl{pE* catch(Exception e){e.printStackTrace ();} [hA%VF.9 } ?D-1xnxep G\G TS}u[ 9Y!N\-x` //读取保存的下载信息(文件指针位置) %`%oupqm+ private void read_nPos() c^vPd]Ed { Mg;%];2Nt try{ D].!u{## DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); }]_/:KUt int nCount = input.readInt(); )z-)S nStartPos = new long[nCount]; zWpJ\/k~ nEndPos = new long[nCount]; ;EbGW&T for(int i=0;i<nStartPos.length;i++) %JM:4G|q { n4Nb,)M nStartPos = input.readLong(); R>SS\YC'X nEndPos = input.readLong(); :+{G|goZ* } ~>&7~N8 input.close(); [G2@[CtY1 } /!;oO_U:# catch(IOException e){e.printStackTrace ();} ^T@ (`H4@ catch(Exception e){e.printStackTrace ();} 73B,I 0U } >nV~5f+ =!T@'P? i2KN^"v?N private void processErrorCode(int nErrorCode) d4KTwn5g { u~n*P``{ System.err.println("Error Code : " + nErrorCode); Qd;P?W6 } )9F-h8
&" wBZ=IMDu\ twElLOE //停止文件下载 >QO^h<.> public void siteStop() 1Q\P]
- { 0Jz H dz bStop = true; [ZC]O2' for(int i=0;i<nStartPos.length;i++) D\|$!i} fileSplitterFetch.splitterStop(); ly"Jl8/< .GcIwP'aU- FJ0Ity4u6 } %B?@le+% } {$D[l
hj //负责部分文件的抓取 +GCN63nX **FileSplitterFetch.java ]-[M&i=+& */ K"u-nroHW package NetFox; U-Ia$b-5! Pyh+HD\ wZ6D\I import java.io.*; 4x7(50hp# import java.net.*; S3#NGBZ/ YXCltME ZrY#B8 public class FileSplitterFetch extends Thread { V]I@&*O~r 9U[Gh97Sf PL$*)#S"$ String sURL; //File URL (Z:(f~; long nStartPos; //File Snippet Start Position _vOV(#q2a long nEndPos; //File Snippet End Position p7 s#j int nThreadID; //Thread's ID =KQQS6 boolean bDownOver = false; //Downing is over ]0N'Wtbn boolean bStop = false; //Stop identical =&+]>g{T FileAccessI fileAccessI = null; //File Access interface m$N`Xj ,TeJx+z^ \s_lB~"P!3 public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException W|@7I@@$" { aq~>$CHa this.sURL = sURL; 6Gt~tlt:L this.nStartPos = nStart; zED#+-7 this.nEndPos = nEnd; )ph**g nThreadID = id; 5mzOr4*0 fileAccessI = new FileAccessI(sName,nStartPos);//定位 6 3TeTGp$ } WFWQ;U{| wyzx9`5~d '?| (QU:)F public void run() 9Z?P/
o {
.'`7JU#{ while(nStartPos < nEndPos && !bStop)
>?Y)evW { q/T(s 1D2Uomd( C]@v60I
try{ *"cK_MH/o URL url = new URL(sURL); 'u9,L FO HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); JFOto,6L: httpConnection.setRequestProperty("User-Agent","NetFox"); [tN^)c`s/ String sProperty = "bytes="+nStartPos+"-"; bBx.snBK httpConnection.setRequestProperty("RANGE",sProperty); 7RXTQ9BS Utility.log(sProperty); @|I:A b5!\"v4c 7JC^+rk InputStream input = httpConnection.getInputStream(); C\-Abqc //logResponseHead(httpConnection); Lj]I7ICNh [^N8v;O T >pz/7gb byte[] b = new byte[1024]; \R!.VL3Tx$ int nRead; z-9@K<`H while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop)
ywQ>T+ { D8S?xK 7[ nStartPos += fileAccessI.write(b,0,nRead); .`I;qF //if(nThreadID == 1) ~*R:UTBtw // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); L&D+0p^lI } :S['hBMN +jpaBr-O# Kmk}Yz Utility.log("Thread " + nThreadID + " is over!"); N3M:|D bDownOver = true; R,Gr{"H //nPos = fileAccessI.write (b,0,nRead); f+}Rj0A } R,3E_me"} catch(Exception e){e.printStackTrace ();} @M]uUL-ze } *.'9 eC0s } YwbRzY-#F B~%'YQk ]1 V,_^D //打印回应的头信息 oK-T@ &- public void logResponseHead(HttpURLConnection con) \IL;}D{ { \BRxdK' for(int i=1;;i++) $`KddW0_ { N }$$<i2o String header=con.getHeaderFieldKey(i); tEU}?k+:j) if(header!=null) Ou26QoT9XI //responseHeaders.put(header,httpConnection.getHeaderField(header)); 98c##NV(7| Utility.log(header+" : "+con.getHeaderField(header)); rLkUIG else }Q }&3m~g break; -d j9(~?^ } TT85G } nZ4JI+Q)~ $ 8"we /J0YF
public void splitterStop() |JUb 1|gi { S.: m$s bStop = true; qw#wZ'<n } yN'<iTh .Mn_T*F [lU0TDq } "7> o"FQ gI~4A, I.4o9Z[? /* _f"HUKGN **FileAccess.java ;s^br17z~ *//文件访问(定位,写) : ~RY package NetFox; ^|b ]E import java.io.*; ?Aq
\Gr =XRTeIZ +vDEDOS1 public class FileAccessI implements Serializable{ a/4!zT sI/]pgt2 //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 zL^`r)H RandomAccessFile oSavedFile; x|7vN E=Q long nPos; n?UFFi+a Wzn!BgxRr =do*( public FileAccessI() throws IOException A`#/:O4|f { f;PPB@ :`$ this("",0); 5W Z9z-6 } k@[P\(a3b u|.c?fW'3 $i|c6& public FileAccessI(String sName,long nPos) throws IOException "X[sW%# F { ,k9@%{4 l oSavedFile = new RandomAccessFile(sName,"rw"); i[+cNJ|$B0 this.nPos = nPos; nfldj33* oSavedFile.seek(nPos); Np.]
W( } 9s.x%m, tc|`cB3f rnkq. public synchronized int write(byte[] b,int nStart,int nLen) hja;d1yH { `U.VfQR: int n = -1; ~xp(k try{ O(_a6s+m oSavedFile.write(b,nStart,nLen); 342m=7lK n = nLen; =V[ey } : xBG~D catch(IOException e) !5wuBJ0 { 9B&fEmgEc? e.printStackTrace (); z5>
{(iY;, } .{=|N8*py8 x!i(M>P ./KXElvQ% return n; `Z'h[-2` } d3IMQ_k D)_67w|u| "44A#0)B'l } iC.k8r+~ H}p5qW.tH: {,9^k'9 /* )tD[Ffvr **SiteInfoBean.java J^Mq4& */ wuV*!oef o package NetFox; }JWLm.e ov9+6'zya f6*6 *= public class SiteInfoBean { c@&`!e
W>HGB B(zcoWQ*B private String sSiteURL; //Site's URL O'i!}$=g private String sFilePath; //Saved File's Path O,c}T7A'?w private String sFileName; //Saved File's Name X9S`#N private int nSplitter; //Count of Splited Downloading File )*CDufRFz Ocp`6Fj BB .^[:,dA public SiteInfoBean() ~x #RIt {//nSplitter的缺省值为5 gx55.} //default value of nSplitter is 5 "dItv#<:} this("","","",5); fK?/o]vq } ';>A=m9(4% 4owM;y |Q\O%
cb public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) %p(!7FDE2n { 4[P]+Z5b+ sSiteURL= sURL; |ler\"Eu sFilePath = sPath; ~w,c6Z sFileName = sName; b rpsZU this.nSplitter = nSpiltter; CBrC
;J&p17~T9 U%? } 6 *GR_sMm %%c1@2G< 6oA2"!u^w public String getSSiteURL() a:V2(nY { +k<0:Fi return sSiteURL; 7/># yR } [/+}E X mFa%d8Y cmu| d public void setSSiteURL(String value) sPxDo?1x- { u6lcl}' sSiteURL = value; E8LZ%
N# } ~_GW "R5! VV DKnlbl1^? public String getSFilePath() N\nxo0sl { eJ"je@vvrK return sFilePath; U-6pia/o } a@v}j& iU1yJ= V\6V&_ public void setSFilePath(String value) NSV;R~" { O}Mu_edM sFilePath = value; 7mT
iO?/y< } NQu.%= bSvr8FY3d aJ3.D public String getSFileName() 9,J^tN@^ { S"Z.M _ return sFileName; d#vo)> } $sS;#r0 !V~,aoKTj 5==hyIy public void setSFileName(String value) ?qt .+2: { *P;
cSx?2 sFileName = value; vAt]N)R } |EZ\+!8N:{ my+2@ln Bbj%RF2, public int getNSplitter() O =gv2e { 3k_bhK zI return nSplitter; \3XG8J } KSgYf; !eP)"YWI3 Cw$7d:u public void setNSplitter(int nCount) r>,s-T!7 { {7Qj+e^ nSplitter = nCount; Y2d(HD@ } LM2S%._cj; } z~($
" Em]2K: C;\R
62' /* ^hRx{A **Utility.java UNF@%O4_T */ MJugno package NetFox; 4r tNvf5` y{g"w YwU[kr-i public class Utility { S>;+zVF] K:L_y1!T oXFo public Utility() ^|UD&6 dx { :v B9z r0/aw
P<C=9@`! } _@@.VmZL `6RR/~kP( //线程睡眠 b<27XZ@ public static void sleep(int nSecond) <^(>o { &HB!6T/ try{ .r~M7 I Thread.sleep(nSecond); Qpocj: } KXT9Wt= catch(Exception e) VM}7 ~ { &2sfu0K e.printStackTrace (); }!QVcu"+t/ } ["WWaCcx } ]XjL""EbC $&X-ay o //日志 Cg3 d public static void log(String sMsg) Mhu|S)hn { N
oRPvFv System.err.println(sMsg); -T2w?| } yrG=2{I &3f^]n!@ VQ8Q=!] public static void log(int sMsg) Jd28/X5& { PW+B&7{ System.err.println(sMsg); zALtG<_t } ihd^P] } IG90mpLX G=PX'dS c@Xb6 z_> /* W
H%EC$ **TestMethod.java \k3EFSm */ ^{a_:r" package NetFox; 1ZY~qP+n+ v}TFM <UwYI_OX public class TestMethod { Gq-~zmg zy`T!
$ 5'/ff= public TestMethod() 0i(c XB { ///xx/weblogic60b2_win.exe hv *XuT/ try{ 5c$\DZ( SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); nh+Hwj#(x //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); `L%<3/hF SiteFileFetch fileFetch = new SiteFileFetch(bean); ~\+Bb8+hpJ fileFetch.start(); 7Y5.GW\^ } JnLF61 catch(Exception e){e.printStackTrace ();} %+oqAYm+s o37D~V; ~l}\K10L* } VIg6' B+z>$6 XTRF IY public static void main(String[] args) 9.B gsV . { 7^<6|>j4 new TestMethod(); ;;+h4O ) } G5ShheZd } &gcZ4gpH 点击下载更多相关资料
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