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/* 6:`4bo **SiteFileFetch.java [g$IN/o% */ *4[P$k$7 package NetFox; V_jGL<X| import java.io.*; lLNI5C import java.net.*; $x(p:+TI\4 v)LSH;< r/RX|M public class SiteFileFetch extends Thread { hGU 3DKHT Z>ztFU SBamgc SiteInfoBean siteInfoBean = null; //文件信息Bean co>IJzg long[] nStartPos; //开始位置 (iY2d_FQ[ long[] nEndPos; //结束位置 rnM C[ FileSplitterFetch[] fileSplitterFetch; //子线程对象 QTjnXg?Ri long nFileLength; //文件长度 U]O>DM^' boolean bFirst = true; //是否第一次取文件 rh6 e boolean bStop = false; //停止标志 gmtS3, File tmpFile; //文件下载的临时信息 K,@} 'N DataOutputStream output; //输出到文件的输出流 F2dwT !>6`+$=U //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) Nq[-.}Z6 public SiteFileFetch(SiteInfoBean bean) throws IOException \N)!]jq { cs)R8vuB)z siteInfoBean = bean; qDjH^f //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); 6Q}>=R^h tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); ;rt\ if(tmpFile.exists ()) Y|-:z@n6C {
`6pz9j] bFirst = false; K,H xe;- read_nPos(); 5YQJNP } lYy:A%yDT else .8]=yPm { (O'O#AD nStartPos = new long[bean.getNSplitter()]; zz-X5PFn nEndPos = new long[bean.getNSplitter()]; 8n/[oDc] } <|VV8r93 M#xol/)h dXDuO Q VWVZ >l } X92I==-w nC#SnyUO a0hgF_O1 public void run() Fhs/<w- { q`HK4~i, //获得文件长度 $QaEU="Z //分割文件
S
vW{1 //实例FileSplitterFetch h`Xl~= //启动FileSplitterFetch线程 BqDOo(%1) //等待子线程返回 `6{4?v try{ >UV?nXP} if(bFirst) 0|]qWcD { 2\G[U#~bi nFileLength = getFileSize(); r,wC5%&Za if(nFileLength == -1) Q-||A { |O[ I=! System.err.println("File Length is not known!"); 0t)5K O } ]v0=jm5A else if(nFileLength == -2) 3OJGBiDAr { k(_^Lq f- System.err.println("File is not access!"); }XRRM:B|)( } ?nD]p! else QMwV6cA { h{CyYsQ for(int i=0;i<nStartPos.length;i++) CA,2&v" { p}q]GJ nStartPos = (long)(i*(nFileLength/nStartPos.length)); vJ uL+'[i } T_<: for(int i=0;i<nEndPos.length-1;i++) h]k1vp)Q y { ^6 \@$ nEndPos = nStartPos[i+1]; Uk4G9}I } y1 Y nEndPos[nEndPos.length-1] = nFileLength; __ G=xf } M(W-\L } &M2fcw? $K_-I8e| TGI`}# //启动子线程 Y2(,E e2 fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; M[^EHa<i for(int i=0;i<nStartPos.length;i++) ? 1Uq ud { )D
':bWP fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), gHVD,Jr siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), lF)k4
+M nStartPos,nEndPos,i); -@/!u9l Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); r1.OLn?C fileSplitterFetch.start(); LO)p2[5#R } DC*6=m_ // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), EP8R[Q0_" siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); W!
GUA< // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", Fj1'z5$ nEndPos = " + nFileLength); Q6fPqEX= // fileSplitterFetch[nPos.length-1].start(); +$B#] , $GIup5 USbFUHdDc //等待子线程结束 v\Zq=,+ //int count = 0; tdnd~ WSR //是否结束while循环 (2r808^2 boolean breakWhile = false; \7 }{\hY- 'BNZUuUl 3 /LW6W| while(!bStop) 6?= ^8 { Tywrh9[ write_nPos(); g715+5z[ Utility.sleep(500); ~0Mw\p%} breakWhile = true; _&PF (/w )4
'yI* 9f$3{ g{m for(int i=0;i<nStartPos.length;i++) T_~xDQ` v { CMHg]la if(!fileSplitterFetch.bDownOver) =v~$&@ { @<44wMp breakWhile = false; Vet<,;Te break; Lq{/r+tt/ } _"- ,ia[D } D~@lpcI if(breakWhile) Ir3|PehB break; \,yg@R opqf)C r+}<]?aT>- //count++; Px?0)^"2 //if(count>4) WsR4)U/]v // siteStop(); -d6PXf5 } ]0;,M wO"ezQ =+VI{~.|} System.err.println("文件下载结束!"); #,rP1#? } K=!?gd!Vw catch(Exception e){e.printStackTrace ();} u1/q8'RW } 42 0cbD3a vXibg wKAxUPzm //获得文件长度 qX*Xo[Xp public long getFileSize() ;Dc\[r { mH!\]fmR~ int nFileLength = -1; )|<g\>/ try{ 10$:^ URL url = new URL(siteInfoBean.getSSiteURL()); BHZSc(-o HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); I7jIA>ZZi httpConnection.setRequestProperty("User-Agent","NetFox"); 'jBtBFzP- 1:Xg&4s !4mAZF
b int responseCode=httpConnection.getResponseCode(); $kn"S>jV if(responseCode>=400) #oEq)Vq>g| { (eO_]<wmky processErrorCode(responseCode); q4ej7T8 return -2; //-2 represent access is error @{x+ln1r } ;Yn_*M/* P!~B07y u|\K kk String sHeader; @1)C3(=A 7kQ,D,c' 7dXh,sD for(int i=1;;i++) l u V_ { n_-k <3 //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); Y~I6ee,\ //Utility.log(in.readLine()); =8x-+u5}rK sHeader=httpConnection.getHeaderFieldKey(i); P%Wl`NA P if(sHeader!=null) t}Kzh` { "
{Nw K if(sHeader.equals("Content-Length")) S{qn^\0 { "gq_^& nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); qN6GLx% break; Oa-~}hN } rcG-Vf@ } [300F=R else B-aJn8>/ break; Axx{G~n! [ } X e\,:~ } kF7`R4Sz catch(IOException e){e.printStackTrace ();} j%E9@# catch(Exception e){e.printStackTrace ();} (r$QQO)/ W[.UM T( sEk Utility.log(nFileLength); 5fud:k K@;ls iuWw(dJk return nFileLength; T!gq
Z } ^HNccr d15E$?ZLH BG2Z'WOH //保存下载信息(文件指针位置) v*EErQML8b private void write_nPos() _@ @"' { KS(Ms*k;' try{ Zj2tQ}N output = new DataOutputStream(new FileOutputStream(tmpFile)); QNCG^ub output.writeInt(nStartPos.length); v@
OM for(int i=0;i<nStartPos.length;i++) _c6 zzGtH { Lcy>!3q3~ // output.writeLong(nPos); `jH 0FJQ output.writeLong(fileSplitterFetch.nStartPos); wfc+E9E output.writeLong(fileSplitterFetch.nEndPos); ru1FJ{n } }J\KnaKo output.close(); 8:t1%O$ } i+Btz- catch(IOException e){e.printStackTrace ();} !FJ_\UST0 catch(Exception e){e.printStackTrace ();} Q4&<RWbT^ } ^W<uc :L7 8rgNG7d %dA7`7j //读取保存的下载信息(文件指针位置) /A/k13 J private void read_nPos() Q
OP8{~O { qVmG"et'J try{ iC\t@BVS DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); &|)
(lX int nCount = input.readInt(); WJ(E3bb nStartPos = new long[nCount]; #ui7YUR=2 nEndPos = new long[nCount]; ]e]l08 for(int i=0;i<nStartPos.length;i++) v0S7 ]?_ { ShRkL< nStartPos = input.readLong(); ];G$~[ nEndPos = input.readLong(); z3p#` } '8bT9 input.close(); B=J/HiwV) } Bc2PF;n catch(IOException e){e.printStackTrace ();} [P"R+$"
catch(Exception e){e.printStackTrace ();} LjA>H>8%[ } h; sdm/ pM'AhzS Og3bV_," private void processErrorCode(int nErrorCode) (_O_zu8_ { 9:jZ3U System.err.println("Error Code : " + nErrorCode); cE0Kvqe` } Ok2>%e YC0FXN V *FEY"W+bY //停止文件下载 ;R.l?Bg public void siteStop() #y%?A; { LXQ-J bStop = true; JK9}Kb}; for(int i=0;i<nStartPos.length;i++) YKs^aQm# fileSplitterFetch.splitterStop(); H&zhYKw
SvR? nN| '^Ce9r} } ,zY!EHpx } Zf%6U[{ T //负责部分文件的抓取 -KG3_k E **FileSplitterFetch.java a7UfRG */ )q+9_KUq package NetFox; O<v9i4* SRx `m,535 *S@0o6v import java.io.*; mf)o1O&B import java.net.*; (l3P<[[? sS|N.2* _GK3]F0 public class FileSplitterFetch extends Thread { kGSB6 @}cZxFQ!C `Dco!ih String sURL; //File URL mMEa*9P long nStartPos; //File Snippet Start Position h^KLqPBt{ long nEndPos; //File Snippet End Position e.IKmH]z int nThreadID; //Thread's ID =K2mR}n\; boolean bDownOver = false; //Downing is over #7A_p8 boolean bStop = false; //Stop identical hup<U+p FileAccessI fileAccessI = null; //File Access interface zbDM+; I5J9,j p KF>_\
public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException icPg<>TQ { SlZ>N$E this.sURL = sURL; Qm X(s this.nStartPos = nStart; ~y(-j[ this.nEndPos = nEnd; z2QZ;ZjvRS nThreadID = id; 3yfq*\_uXw fileAccessI = new FileAccessI(sName,nStartPos);//定位 a jCx"J } yS[Z%]bvU c{u~=24;%# E5<}7Pt public void run() VfiMR%i} { NN9`jP2 while(nStartPos < nEndPos && !bStop) e/;chMCq { ^3L6mOoA ?][2J 93npzpge try{ ?>W4*8( URL url = new URL(sURL); 0#rv.rJ{ HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); !be6} httpConnection.setRequestProperty("User-Agent","NetFox"); %?3\gFvBo String sProperty = "bytes="+nStartPos+"-"; cR1dGNcp/@ httpConnection.setRequestProperty("RANGE",sProperty); 2I#4jy/g Utility.log(sProperty); f:h.O# d> [1Yx#t 9s-op:5 InputStream input = httpConnection.getInputStream(); w8Mi:;6 //logResponseHead(httpConnection); m b\}F9 qi\!<clv Sh=Px9'i byte[] b = new byte[1024]; x^|J- int nRead; YEWHr>&Z while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) w-%H\+J { ]r{-K63P{! nStartPos += fileAccessI.write(b,0,nRead); <z*SO
a //if(nThreadID == 1) DVNGV // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); #Pulbk8 } l*|^mx^Q Gw$sL&1m\ @JWoF^U Utility.log("Thread " + nThreadID + " is over!"); aNpeePF)z bDownOver = true; [*j
C //nPos = fileAccessI.write (b,0,nRead); 6N&S3<c4JO } $GyO+xF catch(Exception e){e.printStackTrace ();} "bRg_]\q6 } >Udb*76
D } ~R]E=/ m| {Tp0#fi p0xd
c3 //打印回应的头信息 tj ,*-).4% public void logResponseHead(HttpURLConnection con) Eg"DiI)7 { av( d0E}}b for(int i=1;;i++) D@yg)$;z { VJX{2$L String header=con.getHeaderFieldKey(i); XB)e;R if(header!=null) gOI#$-L //responseHeaders.put(header,httpConnection.getHeaderField(header)); `MgR/@%hr Utility.log(header+" : "+con.getHeaderField(header)); `CI9~h@k else \guZc}V]:\ break; )*I=>v.Jq } %6}S'yL } j[XA"DZR< 8z^?PZ/ K2TO,J3 E public void splitterStop() {R7>-Y[4)2 { sD$
\!7:b bStop = true; ^A^,/3 } 8{HeHU W>Y8 u8 .$DB\jJXjV } 6u3DxFiTm `)F lb|da eB78z@ /* @.gT&Hq **FileAccess.java UAT46 *//文件访问(定位,写) _7YAF,@vT package NetFox; C|Bk'<MI import java.io.*; zYdSg<[^ ,9q=2V[GP ^CTgo,uf6H public class FileAccessI implements Serializable{ p3:x\P<| cve(pkl //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 fMr6ZmB RandomAccessFile oSavedFile; 0\g;^Zpi long nPos; e_+`%A+- cI4%zeR _=jc%@]1y public FileAccessI() throws IOException hi>Ii2T { e|
(jv<~r this("",0); yUQ;tTI } GBvB0kC) c VuwBnQ.2k j?1\E9&4-Q public FileAccessI(String sName,long nPos) throws IOException lph3"a^ { %5*gsgeI oSavedFile = new RandomAccessFile(sName,"rw"); ](NSpU|* this.nPos = nPos; :tM|$TZ oSavedFile.seek(nPos); Z!C\n[R/ } -Q;5A;sr2 6rL'hB!!]* N~ljU;wo-9 public synchronized int write(byte[] b,int nStart,int nLen) Qp<?[C}'W { TH/!z,(> int n = -1; &-+qB
>SK> try{ 5oplV(<?*S oSavedFile.write(b,nStart,nLen); EuqmA7s8A n = nLen; ~)D2U:"^xm } 0\wMlV`F catch(IOException e) kf0zL3| { VG+Yhm<SL e.printStackTrace (); B8 -/C\ } ;u,%an<( |hehROUn "OFYVK\]i return n; 5Ga>qIM } \SnW(,`o X 3mZX@h@ O{&5 /xBA } %,MCnu&Z whoz^n3N E /^qCJp` /* skdSK7 n **SiteInfoBean.java pq*b"Jku1 */ fu9y3` package NetFox; !
2"zz/N{ h|dVVCsN jgYUS@} public class SiteInfoBean { p*W4^2(d u.0Z)j}N {g l-tRC3 private String sSiteURL; //Site's URL ][ :6En} private String sFilePath; //Saved File's Path _x z_D12 private String sFileName; //Saved File's Name E3.=|]W' private int nSplitter; //Count of Splited Downloading File }f^r@3Cb3 eGvHU ;@ 9#/z[! public SiteInfoBean() <!K2xb-d^ {//nSplitter的缺省值为5
b`E0tZcJ //default value of nSplitter is 5 gPe*M =iF this("","","",5); 0gHJ%m9s } w@.E}%bwq A2Rr*e I'BoP public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) 2j H` { Tx0/3^\>8A sSiteURL= sURL; 17H_>a\` sFilePath = sPath; !li Q;R& sFileName = sName; :^3MN this.nSplitter = nSpiltter; 5h+g^{BE .Q?cNSWU 5)V J } <X
j:c2@ W DY,? (p68Qe%OuG public String getSSiteURL() Lh"Je-x<< { oj$D3 return sSiteURL; W$B>O } 2y#4rl1Utx k5xzC& N+b"LZc public void setSSiteURL(String value) :doP66["! { sBu=@8R]y sSiteURL = value; =iRc& } X82sw>Y DuZ51[3_L m=PSCIb public String getSFilePath() odny{ePAf { `9s5 *;Z return sFilePath; rgB`<[:b } fa/
'4 WY?(C@>s p{t2pfb public void setSFilePath(String value) Sq UoXNw { K`j#'`/KC sFilePath = value; jbn{5af } Ngu+V _I&0HRi QSAz:Yvf| public String getSFileName() G#Nh)ff { X;v/$=-mz return sFileName; =:1f
0QF } 3kdTteyy+ @&S4j]rq r=s,Ath public void setSFileName(String value) *r?g&Vw$m { 4NQS'*%D sFileName = value; E4HG`_cWb } u\ytiGO* t=~al8 JQ%e' public int getNSplitter() V(=~p[ { N/8qd_:8 return nSplitter; CP |N2rb } "\vEi
&C 5sM-E>8G^{ I(s\ Q[ public void setNSplitter(int nCount) Od^y&$|_%` { SBAq,F' nSplitter = nCount; E6NkuBQ(( } V~&P<=8;Wl } hh{4r} | G! zV=p %TPnC'2 /* ]"q)X{G(+ **Utility.java Q68&CO(rE */ W~POS'1 package NetFox; 1V+a;-? v~?d7p{ IW
Lv$bPZ/ public class Utility { tcwE.>5O %^p1ax &tj0Z: public Utility() n9050&_S { ?<#6= rfkk3oy dum! AO } {Lk~O)E ,6}HAC $ //线程睡眠 >+7+ gSD#: public static void sleep(int nSecond) d@b"tb}R { 4G;+ETp try{ f%an<>j^w Thread.sleep(nSecond); G=jdb@V/? } WT;=K0W6& catch(Exception e) Qa5<go{ { 9 @!Og(l e.printStackTrace (); LU?X|{z } KY! } ]V6<h Psi Ib*l{cxN //日志 s!9.o_k public static void log(String sMsg) 14]!LgH { !\}Dxt System.err.println(sMsg); ]~U4; } ]ch cRc[! e/r41 6$4G&'J public static void log(int sMsg) ^IjKT { fYuJf,I[f System.err.println(sMsg); >O&(G0!N+} } *
Od_Cl } k*J}/HO D}SRr,4v >e/; /* Cj _Q9/ **TestMethod.java ZK27^oG */ `5r*4N< package NetFox; H\Y.l,^ );kO27dg 7Z0
)k9* public class TestMethod { qy`@\)S/5 o*_[3{FU H2BD5 public TestMethod() X)e6Y{vO { ///xx/weblogic60b2_win.exe }9/30 try{ `l9Pk\X[ SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); s_hf,QH //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); _UT>,c;h SiteFileFetch fileFetch = new SiteFileFetch(bean); Dq)V] Zx fileFetch.start(); @g
}r*U? } *Y?rls ` catch(Exception e){e.printStackTrace ();} <T)9mJYr WB'&W= -m(9*b{h@ } L~"~C(g '\(Us^Ug MBIt)d@Ix public static void main(String[] args) Pz,kSxe= { =<YG0K new TestMethod(); 2o] V q } .>zXz%p } _VMW-trG 点击下载更多相关资料
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