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/* @[v,q_^8 **SiteFileFetch.java Ugo! */ /)RH-_63 package NetFox; `
,SNq i import java.io.*; 3
[#Rm>,Vu import java.net.*; P(-
u)zv`m B&7:=t,m( public class SiteFileFetch extends Thread { !Mgo~h"]# EXbZ9 o* Txl|F\nK` SiteInfoBean siteInfoBean = null; //文件信息Bean 6pb~+=3n long[] nStartPos; //开始位置 )zy;! long[] nEndPos; //结束位置 <l!:#u FileSplitterFetch[] fileSplitterFetch; //子线程对象 tZx}/&m- long nFileLength; //文件长度 amExZ/ boolean bFirst = true; //是否第一次取文件 s;l"'6:_ boolean bStop = false; //停止标志 &E6V'*<93 File tmpFile; //文件下载的临时信息 )n<p_vz DataOutputStream output; //输出到文件的输出流 "\vQVZd-E _PGd\>Ve //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) p,f$9t4 public SiteFileFetch(SiteInfoBean bean) throws IOException }%c>Hh { |Y6;8e`H siteInfoBean = bean; MtF^}/0w!` //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); =[:E tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); E`xpZ>$mPx if(tmpFile.exists ()) a*}>yad { 4o";p}[b bFirst = false; y8C8~ -&OK read_nPos(); 'C`Ykjf } 4*o?2P$Q else IMM+g]#e { @d^DU5ats> nStartPos = new long[bean.getNSplitter()]; RO3q!+a$/ nEndPos = new long[bean.getNSplitter()]; |Vlx: } >hSu1s: RX_f[ ~xDu2-5 !/a6;:_y } O3T7O`H[ 4i&Rd1#0dI X!ldL|Ua% public void run() jAcKSx$}y" { ~z]VDEJ{q //获得文件长度 av5a2r0W1 //分割文件 /ece}7M //实例FileSplitterFetch \Wg_ gA //启动FileSplitterFetch线程 NX8hFwR //等待子线程返回 WI*CuJU<zJ try{ 8lDb<i if(bFirst) V?0IMc { bYpeI(zK nFileLength = getFileSize(); ^~vM*.j~j if(nFileLength == -1) tux0}|[^' { T%FW|jKw System.err.println("File Length is not known!"); Z]tQmV8e } 79}jK"Gc else if(nFileLength == -2) MwQ4&z#wh { bWlYQ
System.err.println("File is not access!"); _!vy|,w@e } <s\ZqL$f else f9<" { E`@Z9k1 ` for(int i=0;i<nStartPos.length;i++) gs/o cu { z$d<ep{6 nStartPos = (long)(i*(nFileLength/nStartPos.length)); %,<Ki]F } ."O%pL]!/b for(int i=0;i<nEndPos.length-1;i++) h6?Z { z$~F9Es9 nEndPos = nStartPos[i+1]; I
S'Uuuz7g } %K=_ nEndPos[nEndPos.length-1] = nFileLength; .L;e:cvx } X6(s][Wn } FIVC~LDd k.c.7%|~; RP+)sCh //启动子线程 2P^qZDG 8I fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; Wi!"Vcn for(int i=0;i<nStartPos.length;i++) TXyiCS3 { Px*<-t|R- fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), djw\%00 siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), lsOfpJ nStartPos,nEndPos,i); n{etDO Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); (dQ=i fileSplitterFetch.start(); ,d* hhe
} 1iLU{m9 // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), L1DH9wiQi siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); vp*+Ckd // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", #,6T. O nEndPos = " + nFileLength); u-:3C<&> // fileSplitterFetch[nPos.length-1].start(); ; Ad5Jk 5F
^VvzNn lQ!OD&6 //等待子线程结束 %.$7-+:7A //int count = 0; t&[<Dl/L //是否结束while循环 >nih:5J,ja boolean breakWhile = false; 9^8OIv?m8 ]b sabS? mK"s*tD while(!bStop) to,\n"$~! { Fzt?M write_nPos(); )$df6sq Utility.sleep(500); @@{5]Y breakWhile = true; o59$vX, XGC\6?L~ vDi Opd for(int i=0;i<nStartPos.length;i++) q-_!&kDK" { ^->S7[N? if(!fileSplitterFetch.bDownOver) "&4r!2A { #)]t4wa_W breakWhile = false; NsM`kZM4H break; m~Q24Z]!'& } k1zK3I&c_ } 5dE=M};v if(breakWhile) PR$;*|@ break; ^i!6z2/ v0E6i!D/ |K-` //count++; &{+ 0a[rN //if(count>4) y5+%8#3 // siteStop(); {Y Y,{H } 2E!~RjxSY s<k2vbhI ?7LvJ8 System.err.println("文件下载结束!"); *x;4::'Jn } ^IIy> catch(Exception e){e.printStackTrace ();} v}V[sIs} } nM b@
B uZ-ZZE C
<9yh:1"X //获得文件长度 u{\'/c7G public long getFileSize() p:Lmf8EI { \#I$H9O int nFileLength = -1; |C<#M< try{ 25{_x3t^ URL url = new URL(siteInfoBean.getSSiteURL()); .1{{E8Fj HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); nR*'
3 httpConnection.setRequestProperty("User-Agent","NetFox"); Km%L1Cd] .#|?-5q/iN Q!U} int responseCode=httpConnection.getResponseCode(); PS[ C!s&KE if(responseCode>=400) }58MDpOF1 { 8j3Y&m4^ processErrorCode(responseCode); NM![WvtjW return -2; //-2 represent access is error )S2yU<6oOt } s:"Sbml =uAy/S xHJkzI String sHeader; zp1ym}9M E8}evi bG@2f" for(int i=1;;i++) VLkAsM5}% { [{BY$"b#: //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); eJHh } //Utility.log(in.readLine()); oR=i5lAU sHeader=httpConnection.getHeaderFieldKey(i); |.UY'B if(sHeader!=null) .\^0RyJE { U{hu7 if(sHeader.equals("Content-Length")) 8SKrpwy { er)I ".| nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); B<m0YD?>~> break; 0zq'Nf?#3 } #m{*]mY@ } u%)gnj_ else g)#{<#*2 break; G,|!&=Pe|E } }>0>OqvF } 6xJffl catch(IOException e){e.printStackTrace ();} 9T24dofkJ catch(Exception e){e.printStackTrace ();} sEdz`F #H>{>0q bP9ly9FH Utility.log(nFileLength); @3O)#r}\ "yaxHd y-1e(:GF return nFileLength; AT~, } E3wL n/< &R_7]f+%) `9J9[!+!` //保存下载信息(文件指针位置) gK[;"R)4o@ private void write_nPos() tZ9i/ =S { !V37ePFje try{ FHSoj= output = new DataOutputStream(new FileOutputStream(tmpFile)); V<0iYi;4= output.writeInt(nStartPos.length); CPP~,E_ for(int i=0;i<nStartPos.length;i++) IFX$\+- { 0Lxz?R x]< // output.writeLong(nPos); 8v& \F output.writeLong(fileSplitterFetch.nStartPos); =W.}& output.writeLong(fileSplitterFetch.nEndPos); ;J 5z } PWpt\g output.close(); /;Tc] } UPfO;Z`hJ catch(IOException e){e.printStackTrace ();} s.}K?)mH catch(Exception e){e.printStackTrace ();} 2(xC| } 0d9z8y -Qn7+?P !-f Bw //读取保存的下载信息(文件指针位置) \@:,A] private void read_nPos() YS9RfK/ { NFs 5XpZ~ try{ :-k|jt DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); `R[ZY!=+ int nCount = input.readInt(); x.?5-3|d$ nStartPos = new long[nCount]; ,JV0ib, nEndPos = new long[nCount]; 5XZ!yYB? for(int i=0;i<nStartPos.length;i++) @%R<3!3v { '+cI W(F? nStartPos = input.readLong(); }6c>BU}DF nEndPos = input.readLong(); ijF_
KP' } ump~)?_B input.close(); KT(Z
#$ } @yaFN>w catch(IOException e){e.printStackTrace ();} kW g.-$pp catch(Exception e){e.printStackTrace ();} (8JU!lin } @0?!bua_| >0IZ%Wiz u#E'k
KGO private void processErrorCode(int nErrorCode) pSw/QO9 { v~P,OP("c System.err.println("Error Code : " + nErrorCode); o|(5Sr&H } %X{EupiFA @Iv;y*y $RPW/Lyiq //停止文件下载 }~XWtWbd- public void siteStop() V0\[|E;F { HgF;[rq3Q bStop = true; >M,oyM"s for(int i=0;i<nStartPos.length;i++) $RaN@& Wm fileSplitterFetch.splitterStop(); )|F|\6:ne +$,Re.WnP h4?x_"V" } FRBu8WW0L } n{;j //负责部分文件的抓取 'x!\pE- **FileSplitterFetch.java !Lf<hS^ */ V)`2Kw package NetFox; IY`p7 )#i x<NPp&GE @c3xUK import java.io.*; &_ekA44E import java.net.*; SAx9cjj+ ]k0
jmE x *eU~e_jP public class FileSplitterFetch extends Thread { ,fVD`RR(W? p
T(M>LP83 Lx^ eaP5 String sURL; //File URL /U~|B.z@6 long nStartPos; //File Snippet Start Position #<im? long nEndPos; //File Snippet End Position 6[> lzEZ int nThreadID; //Thread's ID X*8y"~X|vq boolean bDownOver = false; //Downing is over %qP[+N& boolean bStop = false; //Stop identical )h!cOEt FileAccessI fileAccessI = null; //File Access interface IS bs l=F &],uD3:5O =!O->C: public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException kmI0V[Y { q+
$6D;9 this.sURL = sURL; yB*,)x0
@ this.nStartPos = nStart; FK|O^->B this.nEndPos = nEnd; `2s!%/ nThreadID = id; `FP?9R6Y fileAccessI = new FileAccessI(sName,nStartPos);//定位 WNjwv/ } mPV<a&U kSQ8kU_w+ '|C3t!H` public void run() ly[LF1t { X%1TsCKMj while(nStartPos < nEndPos && !bStop) )D)5
`n) { ^QB[;g.O D6sw"V# p*Bty@CRi try{ hRcb}>pr URL url = new URL(sURL); 7|P
kc(O HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); U@lc1# httpConnection.setRequestProperty("User-Agent","NetFox"); NR{wq|" String sProperty = "bytes="+nStartPos+"-"; l\HdB"nT httpConnection.setRequestProperty("RANGE",sProperty); aER|5!7(2\ Utility.log(sProperty); mP(3[a_Q @fL ^I&++ OZ,kz2SF# InputStream input = httpConnection.getInputStream(); Hd|l6/[xz //logResponseHead(httpConnection); p5Q]/DhG f^WTsh] KhCP9(A=Qo byte[] b = new byte[1024]; v<qh;2 int nRead; (L_-!=e while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) !d*[QD8 { IP~!E_e}\ nStartPos += fileAccessI.write(b,0,nRead); ^4y]7p //if(nThreadID == 1) ;SR ESW // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); US6_5>/ } 092t6D} R$a<= \INH[X#> Utility.log("Thread " + nThreadID + " is over!"); !QUY ( bDownOver = true; j=_rUc'Me //nPos = fileAccessI.write (b,0,nRead); Q M,!-~t } &K)8 catch(Exception e){e.printStackTrace ();} weitDr6 } )Nv1_en<! } VSj!Gm0LB ~xH&"1 !XA3G`}p6s //打印回应的头信息 7p&jSOY public void logResponseHead(HttpURLConnection con) XX;4A { 30Yis_l2h for(int i=1;;i++) bdUPo+ { "}]`64? String header=con.getHeaderFieldKey(i); )^h6'h` if(header!=null) cH]tZ$E` //responseHeaders.put(header,httpConnection.getHeaderField(header)); dn6B43w Utility.log(header+" : "+con.getHeaderField(header)); KWwtL"3 else T X`X5j break; xS18t=" } 3:%k
pnO } j jpYg *OVB;]D3+ 6 Z/`p~e public void splitterStop() ;`9f<d#\ { 1C[9}} bStop = true; y!e]bvN } <G"cgN#] bRC243]g*A #%"q0" } 4 p_C+4 &[.5@sv (iIw}f)w /* 'Pz%c}hJ **FileAccess.java T?9D?u?] *//文件访问(定位,写)
idmU.` package NetFox; QbU5FPiN import java.io.*; B(
[x8A] eh#37*- D{|q P
nE4 public class FileAccessI implements Serializable{ E3L?6Qfx> I8F+Z //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 ]!UYl RandomAccessFile oSavedFile; ~iw&^p|=K long nPos; rvA>khu0/ gmTBT#{6yH wZrFu(_ public FileAccessI() throws IOException xQ?>72grP { !`ol&QQ# this("",0); 1I Yip\:lS } Pms@!yce ^<]'?4m] [^>XRBSm public FileAccessI(String sName,long nPos) throws IOException a"~o'W7 { _8K+iqMZG oSavedFile = new RandomAccessFile(sName,"rw"); y48]|%73 this.nPos = nPos; a|ft l&uk oSavedFile.seek(nPos); KaIKb=4L| } V>$( N/1 owVvbC2<b( H$6RDMU public synchronized int write(byte[] b,int nStart,int nLen) wNONh`b { ,'NasL8?We int n = -1; .^YxhUH,G try{ p_r` " oSavedFile.write(b,nStart,nLen); $QX$r N n = nLen; @xG&K{j } ?7{U=1gb$ catch(IOException e) 5Z=4%P*I { f^%3zWp|- e.printStackTrace (); PSrx! } &\zYbGU F<4rn ;w{<1NH2+. return n; `CK~x= } M,Gy.ivz :XKYfc_y ~G@NWF?7 } [%IOB/{N Ht`fC|E /iW+<@Mas /* ]kh]l8t ^ **SiteInfoBean.java Rq4;{a/j */ >Wg=
Tuef package NetFox; Y#U.9>h 9t! d.} ?2<QoS public class SiteInfoBean { ",r
v%i2 f G
hM #h!+b private String sSiteURL; //Site's URL c
'|*{%<e2 private String sFilePath; //Saved File's Path |jsI-?%8J private String sFileName; //Saved File's Name ktu?-?#0, private int nSplitter; //Count of Splited Downloading File kuY^o,u-1e YMGy-]!o X<ex
>sM public SiteInfoBean() ;W|kc</R* {//nSplitter的缺省值为5 UhB+c //default value of nSplitter is 5 ?7\V)$00(& this("","","",5); 1=VyD<dNG6 } xBHf~:! PZ[-a-p40 xL* psj public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) b[%@3 }E { ci,(]T+! sSiteURL= sURL; $`pf!b2Z sFilePath = sPath; UBo0c?,4 sFileName = sName; S)CsH1Q this.nSplitter = nSpiltter; }2
S. HG]ARgOB FlO?E3d } O[X*F2LC4 :@w~*eK ~ :J;U~emq public String getSSiteURL() 8)B{x[?| { F`}'^> return sSiteURL; )! [B( } #83 @kXuC< =dm9+ff public void setSSiteURL(String value) 3j#VKj+Uc { H4i}gdR sSiteURL = value; N$=YL
@m8 } 4+olyBht L3]J8oEmU ^&3vGu9 public String getSFilePath() tqZ91QpW { z/Lb1ND8 return sFilePath; 88Pt"[{1 } hV3]1E21" ]4rmQAS7" Q`CuZkP( public void setSFilePath(String value) 3G// _f { b[vE!lJEq sFilePath = value; Rtf<UhUn } u5CSx'h] I0-1Hr Kq7r+A public String getSFileName() L5hF-Ek!
3 { NF$6yv9C return sFileName; %Tp9GGt } #rHMf%0 OPvPP>0*8 @`.4"*@M public void setSFileName(String value) 0+&WIs { DksYKv sFileName = value; UG vIH m } Uo3 =B&|\2`{) r$<!?Z public int getNSplitter() -J]?M { 0GMb?/
return nSplitter; }3
/io0"D } J~x]~}V& t!D'ZLw rpk8 public void setNSplitter(int nCount) St;9&A { M]8>5Zx. nSplitter = nCount; AB=%yM7V* } `n+uA~ } !&%KJS6p4 pI@71~|R l6zAMyau5 /* 9WHE4'Sa **Utility.java l4gH]!/@ */ q\tr&@4iC package NetFox; /OKp(u;)z +kI}O*s 6>?qBWW public class Utility { qMaO1cE\ za>%hZf\ P, x"![6 public Utility() |E13W { k(f),_ +5fB?0D; F%L"Q>aHW } Eu|/pH=: fMwF|; //线程睡眠 lB}?ey public static void sleep(int nSecond) s.(.OXD& { y9}qB:[bR try{ f y|JE9Io_ Thread.sleep(nSecond); 4n#u?) } H
Qj,0#J) catch(Exception e) y^r'4zN' { X&Oo[Z e.printStackTrace (); ?`TQ!m6y } o.$48h( } .p{lzI9 h`Jc%6o //日志 <mX5VGY9^ public static void log(String sMsg) J
rK{MhO { dC<%D'L* System.err.println(sMsg); h5{//0 y } >MJ%6A> hMupQDv/I {F_>cyR public static void log(int sMsg) d{TcjZ { E[hSL#0 System.err.println(sMsg); /A5=L<T6F } }51QUFhL0 } ^uo,LTq+ padV|hF3(e YBY;$&9 /* 6cg,L:j# **TestMethod.java 9u~C?w */ L^u|=9 package NetFox; ?23J(;)s )^UqB0C6^ dLQp"vs $ public class TestMethod { A?tCa*b^ 0MT?}D&TL ,%Pn.E* r; public TestMethod() TaF*ZT2 { ///xx/weblogic60b2_win.exe +;H=_~b try{ `-nSH)GBM SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); bSM|" //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); {?
yRO] SiteFileFetch fileFetch = new SiteFileFetch(bean); C\rT'!Uk\Q fileFetch.start(); Zy Df@(z` } ; 8VZsh catch(Exception e){e.printStackTrace ();} `?:{aOI [/ CB1//Y va~:Ivl-) } 0r@LA|P 3{H!B&sb 5i$P$ R public static void main(String[] args) x8z6 < { 0?R$>=u new TestMethod(); /3+E-|4s } *{JD=ua } =5:vKL j 点击下载更多相关资料
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