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/* Up/u|A$0V **SiteFileFetch.java :*&9TNUE@ */ iI@Gyq= package NetFox; am'p^Z@ import java.io.*; pGbFg& import java.net.*; v!{'23`87 7~l ;aK !eD$ public class SiteFileFetch extends Thread { seqF84Xd< gQpD]p%k Dss/>!
mN SiteInfoBean siteInfoBean = null; //文件信息Bean zEPx long[] nStartPos; //开始位置 z1SMQLk long[] nEndPos; //结束位置 oB{}-[G FileSplitterFetch[] fileSplitterFetch; //子线程对象 23\j1? long nFileLength; //文件长度 77&^$JpM boolean bFirst = true; //是否第一次取文件 400Tw`AiJ boolean bStop = false; //停止标志 ZG\ I1 File tmpFile; //文件下载的临时信息 Z>w^j.( DataOutputStream output; //输出到文件的输出流 vrm{Ql& .1z$ A //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) \`Ph=lJO public SiteFileFetch(SiteInfoBean bean) throws IOException 6aF'^6+a { qvfAG 0p siteInfoBean = bean; (|a$N.e&K //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); x+*L5$;h tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); o~.o^0Y if(tmpFile.exists ()) $YGIN7_Gg { gcW{]0%L^ bFirst = false; .t^UK#@#4 read_nPos(); L4/TI(MP } ;/)Mcx] n else :U-US|)(2 { ^;CR0.4 nStartPos = new long[bean.getNSplitter()]; jY#(A23 nEndPos = new long[bean.getNSplitter()];
u5{5ts+: } DtJTnvG~B ++Ys9Y)*, nzE,F\k v1"g!%U6 } ej"o?1l@ 8F`BJ6=' eA*Jfb public void run() v-7Rb)EP { rz[uuY7 //获得文件长度 Z*)y.i ` //分割文件 LE0J ;|1 //实例FileSplitterFetch k qY3r & //启动FileSplitterFetch线程 XEUa //等待子线程返回 z"s%#/# try{ AK~`pq[. if(bFirst) SP
D207 { 9HJ'p:{) nFileLength = getFileSize(); .cH{WZ if(nFileLength == -1) kuTq8p2E { Oj4u!SY\j System.err.println("File Length is not known!"); Dc&9emKI }
,3J`ftCV else if(nFileLength == -2) R!_8jD:$ { rKy-u System.err.println("File is not access!"); L&DF,fWsF& } G1?0Q_RN else I4o=6ts { 35%[DUkb for(int i=0;i<nStartPos.length;i++) N)vk0IM! { }o!#_N0T nStartPos = (long)(i*(nFileLength/nStartPos.length)); Xew1LPI } * Y%<b86U for(int i=0;i<nEndPos.length-1;i++) XYK1-m}2 { A'~%_} nEndPos = nStartPos[i+1]; MR?*GI's } [B"dH-r7 nEndPos[nEndPos.length-1] = nFileLength; Mf;|z0UX } Uaus>Frx.T } =YXe1$ $ U=&^H!LVY 4[LLnF-- //启动子线程 ElEv(>G* fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; ]M+VSU for(int i=0;i<nStartPos.length;i++) Z92iil;t { ~|r'2V* fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), O ':0V siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), $TD~k; nStartPos,nEndPos,i); ~$&:NB1~q Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); $KwI}>E4 fileSplitterFetch.start(); w PG1P'w; } I9[1U // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), kb"_6,[Ms siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); xb+RRTgj // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", qLQ <1>u nEndPos = " + nFileLength); kvW|= // fileSplitterFetch[nPos.length-1].start(); X6LhM q3AJwELXw n*vTVt)dJ //等待子线程结束 nOAJ9 //int count = 0; fr}1_0DDz //是否结束while循环 ,?xLT2>J_ boolean breakWhile = false; )h>\05|T ,]PyDq6 i}/e}s<-6 while(!bStop) -y&v9OC2- { E ;BPN write_nPos(); b)on A| Utility.sleep(500); _KB{J7bs<a breakWhile = true; V>b2b5QAH, }J ei$0x '%zN for(int i=0;i<nStartPos.length;i++) W>5vRwx00 { ,hpH!J'5f/ if(!fileSplitterFetch.bDownOver) e2]4a3 { *#&k+{a^2 breakWhile = false; |^7f\.oF break; 8sN#e(@
} V=j-Um; } DS#cm3 if(breakWhile) w/b>awI break; =jg#fdM
- mR{CVU Y7<zm}=(/ //count++; eu#,WwlG //if(count>4) Zg
-]sp] // siteStop(); &8[ZN$Xe" } CS/Mpmsp !c3```* :a_BD System.err.println("文件下载结束!"); _j:UGMTi(U } B.89_!/:p catch(Exception e){e.printStackTrace ();} V]I:2k5 } ?PBa'g QGs1zfh* k:b/Gq` //获得文件长度 S~KS9E~\ public long getFileSize() aq3~!T;W { 3lo;^KX ! int nFileLength = -1; Z[",$Lt try{ KcC!N{ URL url = new URL(siteInfoBean.getSSiteURL()); %'Zc2h&z HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); ,N53Iic httpConnection.setRequestProperty("User-Agent","NetFox"); Iz
DG&c ?Bo?JMV OFc\fW# int responseCode=httpConnection.getResponseCode(); x^A7'ad0 if(responseCode>=400) ""co6qo#> { 1HMUHZT processErrorCode(responseCode); T4mv%zzS return -2; //-2 represent access is error q@(1Yivk } zVSx$6eiU 7;&(} y|$R`P String sHeader; ev9;Ld "\e:h|
.G $}t=RW for(int i=1;;i++) Pm4e8b { 3sH\1)Zz //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); g>so
R&* //Utility.log(in.readLine()); Vy__b=ti? sHeader=httpConnection.getHeaderFieldKey(i); !; IJ if(sHeader!=null) 9A~>`.y { {fZb@7?GF if(sHeader.equals("Content-Length")) geksjVwPH { '"y}#h__T nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); Yc^%zxub break; ?hnx/z+uT } !O|ql6^; } 3gAR4 else xq}-m!nX break; \[yr=X } pz{'1\_+9 } )zU: catch(IOException e){e.printStackTrace ();} ]*qU+& catch(Exception e){e.printStackTrace ();} 8".2)W4*
LheFQ A C,/O
Utility.log(nFileLength); ?WQNIX4 $B\ H 1BJ<m5/1% return nFileLength; 6B0#4Qrv } Ga v"C{G F/>*Ifs nZfs=@w:y //保存下载信息(文件指针位置) U@'F%nHw private void write_nPos() yGxv?%%2 { (&jW}1D try{ kY"KD22a output = new DataOutputStream(new FileOutputStream(tmpFile)); F$Hx`hoy output.writeInt(nStartPos.length); 69-:]7.g for(int i=0;i<nStartPos.length;i++) u:@U
$:sZ { Y25^]ON*\^ // output.writeLong(nPos); #02Kdo&Vy output.writeLong(fileSplitterFetch.nStartPos); ?]c+j1i output.writeLong(fileSplitterFetch.nEndPos); 8V9[a*9 } \q "N/$5{f output.close(); 7Y1GUIRa3 } r`jWp\z catch(IOException e){e.printStackTrace ();} %Tv^GP{} catch(Exception e){e.printStackTrace ();} gY(1,+0- } fiVHRSX60 jfD1 WK0C //读取保存的下载信息(文件指针位置) 4*TmlY private void read_nPos() qTT,U9]: { Tk*w3c"$ try{ WF2NG;f= DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); rAb&I"\ZY int nCount = input.readInt(); MuwQZ]u nStartPos = new long[nCount]; Ha%F"V* nEndPos = new long[nCount]; d H?
ScXM= for(int i=0;i<nStartPos.length;i++) .Pe9_ZH$W { ZtK\HDdp nStartPos = input.readLong(); PY`L$e nEndPos = input.readLong(); 1svi8wh } 9xFO]Y" input.close(); \=;uu_v$ } Ye5jB2Z
catch(IOException e){e.printStackTrace ();} wG1l+^p catch(Exception e){e.printStackTrace ();} ;#1Iiuh } WkP
+r9rT tu0aD%C \}5p0.= private void processErrorCode(int nErrorCode) d,0 }VaY=D { a^t?vv System.err.println("Error Code : " + nErrorCode); H6K`\8/SeN } )}MHx`KT2 WA6!+Gy ?<U{{C //停止文件下载 ,lt8O.h-l public void siteStop() FY'ty@|_s { cK@jmGj+ bStop = true; "B{ECM; for(int i=0;i<nStartPos.length;i++) 0:=ZkEEeU fileSplitterFetch.splitterStop(); l>6@:nq|R x[Im%k o31Nmy
Ni } \K
iwUz } H={&3poBz //负责部分文件的抓取 ;apzAF **FileSplitterFetch.java ?kTWpXx"= */ $s\UL}Gc package NetFox; El-
? % e5?PkFV^a1 a.@qGsIH import java.io.*; :7g=b%; import java.net.*; T6#CK
WC,+Cn e `.%JjsD< public class FileSplitterFetch extends Thread { !ABiy6d rJJ[X4$ vUA0FoOp String sURL; //File URL aG+j9Q_ long nStartPos; //File Snippet Start Position 5D Y\:AF long nEndPos; //File Snippet End Position W_`A"WdT. int nThreadID; //Thread's ID HYK!}& boolean bDownOver = false; //Downing is over ]Mi.f3QlO6 boolean bStop = false; //Stop identical h3*
x[W FileAccessI fileAccessI = null; //File Access interface \4d.sy0&>- 0d^Z uTN ({^9<Us public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException e>}}:Ud { \HZ9S= this.sURL = sURL; "TcW4U9 this.nStartPos = nStart; lrWQOYf2 this.nEndPos = nEnd; +7V{ABfGl nThreadID = id; zYY$D. fileAccessI = new FileAccessI(sName,nStartPos);//定位 *sw7niw } O#a6+W"U CZ<~3bEF &HW1mNF9 public void run() X2|Y { N8r*dadDd while(nStartPos < nEndPos && !bStop) en F :>H4 { (1R?s>3o L!Cz'm"Nl laKuOx} try{ Pmg)v!" URL url = new URL(sURL); . @q-B+Eg HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); ?, r~= httpConnection.setRequestProperty("User-Agent","NetFox"); FR[ B v String sProperty = "bytes="+nStartPos+"-"; uX/$CM httpConnection.setRequestProperty("RANGE",sProperty); ;%C'FV e] Utility.log(sProperty); e({9] @f+8%I3D oR1^/e InputStream input = httpConnection.getInputStream(); N2'qpxOLI //logResponseHead(httpConnection); Z?P~z07 nl aM l v&mp0V+ byte[] b = new byte[1024];
+=q) int nRead; YgUH'P- while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) *l+OlQI0+ { ?>c=}I#Ui- nStartPos += fileAccessI.write(b,0,nRead); >LC<O. //if(nThreadID == 1) "9EE1];NT // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); 2&PPz}Sw } iD38\XNMV mW2,1}Jv qBV x6MI Utility.log("Thread " + nThreadID + " is over!"); 3.d"rl bDownOver = true; Y9=K]GB
//nPos = fileAccessI.write (b,0,nRead); )4>2IQ } 57a2^ catch(Exception e){e.printStackTrace ();} 'ly?P8h } "gtHTqheH } [H<bh% O,bkQY$v .nu @ o40 //打印回应的头信息 T<3BT public void logResponseHead(HttpURLConnection con) fKC3-zm { =<r8fXWZ for(int i=1;;i++) g]c[O*NTL { | Xi% String header=con.getHeaderFieldKey(i); u's`*T@. if(header!=null) 3A:q7#m //responseHeaders.put(header,httpConnection.getHeaderField(header)); n<sd!xmqFx Utility.log(header+" : "+con.getHeaderField(header)); ,;?S\V else =gfI!w break; \<Sv3xy&O } p.I.iAk%G^ } eI.2`)> ]M/9#mD9~ vb 1@yQ public void splitterStop() !Cgx. { -K,-h[o bStop = true; CQ`=V2:"ON } ah
@uUHB SG}V[Glk 5uq3\a } Uz cx6sw %75xr9yOP H>9CW<8 /* p4IZ
**FileAccess.java MuoF FvAA *//文件访问(定位,写) C%*k.$#r! package NetFox; [7(-T?_ import java.io.*; xtPLR/Z L
%ip> m)V/L]4 public class FileAccessI implements Serializable{ Hf'G8vW UnVm1ZWZ //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 G}5 #l RandomAccessFile oSavedFile; 1/p*tZP8i long nPos; ^c~)/F/cF ^pn(=4 1qV@qz public FileAccessI() throws IOException e8YMX&0% { ^pM+A6
XY this("",0);
h:lt<y } ]Jh+'RK\# 1ygpp0IGJ 1c JF/"v public FileAccessI(String sName,long nPos) throws IOException PoEqurH0 { r=yK,d/1 oSavedFile = new RandomAccessFile(sName,"rw"); AiD[SR this.nPos = nPos; Fnk_\d6Ma oSavedFile.seek(nPos); -{^}"N } `eu9dLzH .NtbL./=| ,=?{("+ public synchronized int write(byte[] b,int nStart,int nLen) 4f(Kt,0 { 6}FO[ int n = -1; %OgS^_tu try{ Sq:0w oSavedFile.write(b,nStart,nLen); $}")1|U,X n = nLen; Ra*e5 } kB5.(O catch(IOException e) NrP0Ep%V { p ?wI9GY e.printStackTrace (); '`1CBU$ } (98Nzgxgx} :eo CK,
6ytB return n; {'16:dTJ } '!f5?O+E R |KD&!~Z rJ KZ)N{ } 5NJ4 hzk6rYg1 nQ|r"|g /* r\nx= **SiteInfoBean.java ie-vqLc */ zE;bBwy& package NetFox; Be+0NXLVy %e*@CbO$ 5Sk W-+$ public class SiteInfoBean { 5>AX*]c T{wuj[Q#: u&wiGwF[ private String sSiteURL; //Site's URL m7T)m0 private String sFilePath; //Saved File's Path h*ZC*eV> private String sFileName; //Saved File's Name #07g d#j4 private int nSplitter; //Count of Splited Downloading File :!zl^J; &@ JvnO: (k np# public SiteInfoBean() 9'hv%A:\3 {//nSplitter的缺省值为5 };'\~g,1 //default value of nSplitter is 5 nC{%quwh{ this("","","",5); Zw
wqSyuGf } ^&g=u5
d0 wcDRH)AW. !bV5Sr^ public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter)
]({~,8s { 43V}#DA@ sSiteURL= sURL; VY)s+Bx sFilePath = sPath; 2Pc%fuC sFileName = sName; vFEQ7qI this.nSplitter = nSpiltter; / g 2b IHRGw kA7mLrON } IKie1!ZU{" J*9$; bTQNb!& public String getSSiteURL() Ytgj|@jsp { aZbw]0q@o return sSiteURL; l3 DYg } 1#1 riM - u+{a8= i1RiGS public void setSSiteURL(String value) }jill+] { A=Ss6-Je sSiteURL = value; %c[ V } #pcP! :T9<der, %u;~kP|S% public String getSFilePath() z2Z^~,i { GKcv<G208 return sFilePath; a'\o7_ } Mfv1Os:ST 41SGWAd#: ? R>h ` public void setSFilePath(String value) fU!<HDh { 9uWY@zu sFilePath = value; /> 4"~q) } Zdn~`Q{ "1,pHR-+R 0T46sm r public String getSFileName() 'fPdpnJ< { r [K5w return sFileName; ~H!S,"n^,P } "+unS)M;Y ;t+ub8 jbR0%X2 public void setSFileName(String value) E\C9|1) { K(q-?n`< sFileName = value; [k-+AA>: } B 2ec@]uD` 36am-G MeUaTJFEB public int getNSplitter() |<O9Sb_ { t:fFU1x return nSplitter; Q?X>E3=U } ]KJj6xn R i^[i}
tr7<]Hm: public void setNSplitter(int nCount) i E CrI3s { ~/*MY nSplitter = nCount; g(4xC7xK6 } o;?/HE%,[ } 85GKymz$P MQ"xOcD*F +5XpzZ{#Wa /* /B}lO0]: **Utility.java T*KMksjxm` */ 7k8 pZ package NetFox; JY6
Qp XU"~h64] {GJ@psG* public class Utility { k?'B*L_Mzv :kGU,>BN nR`ov1RH public Utility() ;amXY@RmH { xNbPsoK yiO.z F8apH{&t } 50={%R |DsnNk0c //线程睡眠 F;]%V%F.X public static void sleep(int nSecond) \eFR(gO+ { #t+d iR try{ YIjTL!bA" Thread.sleep(nSecond); nvPwngEQm } q`r**N+zn catch(Exception e) l'eyq}& { 6R^^ .tCs e.printStackTrace (); 8-O)Xx}cU } LGtIm7 } V5rST + KY~-;0x //日志 BT(CM,bp public static void log(String sMsg) G["c\Xux { w`5xrqt@ System.err.println(sMsg); Ih"XV } cCxBzkH6 p3^m9J ynrT a.. public static void log(int sMsg) ^U!0-y { 4F{70"a System.err.println(sMsg); GP#aya } 8e(\%bX } L+q/){Dd( >:b Q @/31IOIV]` /* OE- gC2&Bm **TestMethod.java -(=eM3o-9m */ 3p'I5,} package NetFox; Cid
;z GmP@;[H" 8Q'0h
m? public class TestMethod { {yExQbN %QP0 2=^m9% public TestMethod() n<u
$=H { ///xx/weblogic60b2_win.exe X)% A6M try{ qXwPDq/ SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); >j QWn@ //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); J7g8D{4 SiteFileFetch fileFetch = new SiteFileFetch(bean); \QCJ4}\CS fileFetch.start(); Dbz3;t } ^t#&@-'(d catch(Exception e){e.printStackTrace ();} aSnFKB eYvWZJa4 55fC~J< } ^=-y%kp" Sb82}$sO {.INnFGP@) public static void main(String[] args) nX`u[ks { ]@u6HH~^ new TestMethod(); RtM8yar+sn } EU+S^SyZi } =aTv! 8</ 点击下载更多相关资料
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