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/* gVI2{\a **SiteFileFetch.java '7TT4~F */ d3K-| package NetFox; Q!"W)tD import java.io.*; ,7|Wf
%X import java.net.*; SjB#"A5
]<?7CpP mL[Y{t#N public class SiteFileFetch extends Thread { *IBCThj u3@v
e&J_uG SiteInfoBean siteInfoBean = null; //文件信息Bean _f@,
>l long[] nStartPos; //开始位置 6b9&V` long[] nEndPos; //结束位置 ;gNoiAxW FileSplitterFetch[] fileSplitterFetch; //子线程对象 ;#Pc^Yzc1 long nFileLength; //文件长度 DB;Nr3x boolean bFirst = true; //是否第一次取文件 Jsp>v'Qvq boolean bStop = false; //停止标志 F_C_K"[s File tmpFile; //文件下载的临时信息 *;yn_zg DataOutputStream output; //输出到文件的输出流 gTjhD( /yS/*ET8 //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) 2rJeON public SiteFileFetch(SiteInfoBean bean) throws IOException bjYaJtn { Vm
<9/UG< siteInfoBean = bean; uw`fC%-xh //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); 26<Wg7/, tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); W;@9x1jKX if(tmpFile.exists ()) k=):>} { ?sm@lDZ\ bFirst = false; J}J7A5P read_nPos(); 58H%#3Fy } u }~%9Pi else "[BDa}Il { ,3E9H&@j nStartPos = new long[bean.getNSplitter()]; }MV=I$S2U nEndPos = new long[bean.getNSplitter()]; Ar VNynQ } A/#Xr sCE2 F_xjL -!b@\= +Jv*u8T' } U?d4 ^ Oe[qfsdW jJDYl( [ public void run() .&Ok53]b { /)E'%/"A //获得文件长度 duk:: |{F //分割文件 yL>wCD,L //实例FileSplitterFetch t=Um@;wh //启动FileSplitterFetch线程 ,Y3wXmG //等待子线程返回 I_h{n{,sr try{ ZT'Sw%U: if(bFirst) X0"f>.Lg { +|=5zWI/ nFileLength = getFileSize(); 7yK1Q_XY> if(nFileLength == -1) wu2C!gyBo { `Ufv,_n System.err.println("File Length is not known!"); 2>bV+[@B }
#RA3 T[A else if(nFileLength == -2) ~8
w(M { r0 6M.r System.err.println("File is not access!"); /K@{(=n } ?dcR!-3 else (&a<6k { WgK |r~ for(int i=0;i<nStartPos.length;i++) :xP$iEA`G { w(xRL#% nStartPos = (long)(i*(nFileLength/nStartPos.length)); ']]&<B}mz } GXE6=BO for(int i=0;i<nEndPos.length-1;i++) ,$qqHSd1M { qm&Z_6Pw nEndPos = nStartPos[i+1]; f!"Y"g:@E } 'F[ C 4 nEndPos[nEndPos.length-1] = nFileLength; }&mFpc } ef;Ta|# } 0piBK=tE/ X)TUKt _7M! b9oA //启动子线程 ToB^/
n[ fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; VI(;8 for(int i=0;i<nStartPos.length;i++) ]O;Hlty(g { b88Zk* fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), |_P- siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), ?$T39U^ nStartPos,nEndPos,i); 96.z\[0VZ Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); qJ|n73yn fileSplitterFetch.start(); r4D6I, } j_r7oARL // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), 7q] @Jx9 siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); k9^Vw+$m // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", X}5aE4K/ nEndPos = " + nFileLength); d$G<g78D // fileSplitterFetch[nPos.length-1].start(); b:iZ.I MK<VjpP0( 7Z;w<b~ //等待子线程结束 s;0eD5b>x //int count = 0; iC{~~W6 //是否结束while循环 G{cTQH| boolean breakWhile = false; :~2An-V kH43 T [?$| while(!bStop) Gkr^uXNg# { f2#9E+IQ write_nPos(); R "&(Ae?LR Utility.sleep(500); ($oO,
c'z breakWhile = true; ^!*?vHx: ` tkd1M ZQ^kS9N i for(int i=0;i<nStartPos.length;i++) '1}rQq Z { A!kNqJ2 if(!fileSplitterFetch.bDownOver) YORFq9a{R { 7\
<4LX breakWhile = false; ~Lc>~!!t break; q-.e9eoc\ } !vQ!_|g1 } 1@ j>2>i if(breakWhile) I>27U<PX break; >t"]gQHtx (Jw[}&+ !k&~|_$0@ //count++; Te8BFcJG //if(count>4) id-VoHdK // siteStop(); Hr$oT=x[ } MGO.dRy_ c#G]3vTdE n(Up?_ System.err.println("文件下载结束!"); $l&&y?() } tH:K6^oR catch(Exception e){e.printStackTrace ();} }eX_p6bBw } 6[9E^{(z ;UgRm# k"SmbFn%N0 //获得文件长度 bH41#B public long getFileSize() oPNYCE { y0qE::/H$ int nFileLength = -1; wS2iyrIB try{ >:]fN61# URL url = new URL(siteInfoBean.getSSiteURL()); \QUvImT HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); ,h2q37 httpConnection.setRequestProperty("User-Agent","NetFox"); ru`;cXa, T^a {#B !v2,lH int responseCode=httpConnection.getResponseCode();
hh"0z] if(responseCode>=400) LeW.uh3. { qD\%8l.]Z processErrorCode(responseCode); lq@Vb{Z return -2; //-2 represent access is error AEwb' } {K'SOhH4? 8m A6l0 | 4I x2GD String sHeader; 04;y%~,}U/ ABV\:u ,l<-*yMD for(int i=1;;i++) z1+rz% { FGx_qBG4| //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); Hcd> \0 //Utility.log(in.readLine()); i&,U);T sHeader=httpConnection.getHeaderFieldKey(i); ~,e!t.339 if(sHeader!=null) t%z7#}9$ { >*} qGk if(sHeader.equals("Content-Length")) 3i(k6)H$4 { SEchF"KJQF nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); BHmA*3? break; ~rCnST }
n @L!{zY } <J-OwO a-1 else 8"LaP3U break; _3p:q. } l``1^&K } }WGi9\9T& catch(IOException e){e.printStackTrace ();} F.8{
H9` catch(Exception e){e.printStackTrace ();} M{kPEl&Z 6sy%KO*A o33{tUp' Utility.log(nFileLength); +lha^){ l3MbCBX2 qd|*vE return nFileLength; `A
<yDy } UxicqkX *gz {:}NX #>'1oC{ //保存下载信息(文件指针位置) H[N&Wiq/| private void write_nPos() pjj
5 { G^mk<pH try{ rF0zGNH output = new DataOutputStream(new FileOutputStream(tmpFile)); $fKwJFr output.writeInt(nStartPos.length); L)nVNY@Mc for(int i=0;i<nStartPos.length;i++) om_&|9B) { h.=B!wKK // output.writeLong(nPos); uWnS<O output.writeLong(fileSplitterFetch.nStartPos); &<Gq-IN output.writeLong(fileSplitterFetch.nEndPos); 1]>KuXd
r } j|G-9E output.close(); oZCi_g 5i } a3c4#'c|D catch(IOException e){e.printStackTrace ();} nnGA_7-t catch(Exception e){e.printStackTrace ();} g[M@ } T4!]^_t^ qk,cp},2K qfYb\b //读取保存的下载信息(文件指针位置)
18A&[6"! private void read_nPos() A[ iPs9 { "}HQ)54& try{ _Mt:^H}Sy DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); aY:(0en]& int nCount = input.readInt(); f,L
nStartPos = new long[nCount]; pn $50c nEndPos = new long[nCount]; sId5pY! for(int i=0;i<nStartPos.length;i++) :s'%IGy>: { 93WYZNpX nStartPos = input.readLong(); ygfqP nEndPos = input.readLong(); &HXSO,@ } FY|x<-f input.close(); hE6tu' } ewY[vbF catch(IOException e){e.printStackTrace ();} >Ed^dsb& catch(Exception e){e.printStackTrace ();} |%V.Lae } fBLd5 qBNiuV;* `X^e}EGWu private void processErrorCode(int nErrorCode) GC\/B0! { Ez$5wY^J System.err.println("Error Code : " + nErrorCode); >(*jbL]p } f<;9q?0V F .FXQ,7mZ- f.P( {PN //停止文件下载 ;Z`)*TRp4 public void siteStop() kTk?[BK { {f&ga bStop = true; _uu:)% for(int i=0;i<nStartPos.length;i++) :> q?s fileSplitterFetch.splitterStop(); Y>#c2@^i< j d81E OXacI~C } *(scSC> } ]Cz16e&=2 //负责部分文件的抓取 aBI]' D; **FileSplitterFetch.java >Qx#2x+ */ "|G,P-5G" package NetFox; ^]DWrmy lhI;K4# I coL/7k3 import java.io.*; f!J^vDl import java.net.*; ^`!Daqk e"CLhaT +-nQ,
fOV public class FileSplitterFetch extends Thread { aOD"z7}U Ax^'unfQ: ``<1Lo@ String sURL; //File URL ^"l$p,P+ long nStartPos; //File Snippet Start Position Qm.kXlsDI long nEndPos; //File Snippet End Position []]3"n int nThreadID; //Thread's ID @
tIB'|O boolean bDownOver = false; //Downing is over `@eH4}L* boolean bStop = false; //Stop identical E nvs[YZe FileAccessI fileAccessI = null; //File Access interface 9>#|~P&FE % KA/ _)l %-*Z7p public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException gCJ'wv)6|% { 84[^#ke this.sURL = sURL; r9Z/y*q this.nStartPos = nStart; 19.cf3Dh this.nEndPos = nEnd; $;CC
lzw nThreadID = id; DsX>xzM fileAccessI = new FileAccessI(sName,nStartPos);//定位 ZH(.|NaH } 1;P\mff3Y LbR-uc?x WNb$2q= public void run() ZYsFd_ { /(V=Um^0 while(nStartPos < nEndPos && !bStop) >&&xJ5 { t4IJ%#22 =vc5, Rpk`fxAO try{ `"H?nf0 URL url = new URL(sURL); 4cQ5E9 HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); mvgm o httpConnection.setRequestProperty("User-Agent","NetFox"); Flxo%g}; String sProperty = "bytes="+nStartPos+"-"; `0^i
# httpConnection.setRequestProperty("RANGE",sProperty); * jK))|% Utility.log(sProperty); i-?zwVmn @;6}xO2 y2R=%EFh6 InputStream input = httpConnection.getInputStream(); re!8nuBsA //logResponseHead(httpConnection); %-l:_A
PBL^xlg #& wgsGV8C byte[] b = new byte[1024];
?Qig$ int nRead; M: "ci;*$ while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) rl%Kn^JJ~ { ElXe=5L\# nStartPos += fileAccessI.write(b,0,nRead); 6
b}feEh$! //if(nThreadID == 1) 'D&G~$ // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); !7)ID7d } #'x?)AS 5Mr;6
]I< {_Qxe1^g Utility.log("Thread " + nThreadID + " is over!"); &%X Jf~IQ bDownOver = true; 3@] a#> //nPos = fileAccessI.write (b,0,nRead); 4QFOO
sNp } pU ]{Z( catch(Exception e){e.printStackTrace ();} 3~</lAm; } %5*#c*)R } FA9e(Ha w.aFaR)04 {0e{!v //打印回应的头信息 ['emP1g~ public void logResponseHead(HttpURLConnection con) %h"<
IA
S. { Z5Ihc%J^ for(int i=1;;i++)
_)E8XyzF { qm=F6*@} String header=con.getHeaderFieldKey(i); 0xUj#) if(header!=null) {,FeNf46 //responseHeaders.put(header,httpConnection.getHeaderField(header)); " B{0-H+ Utility.log(header+" : "+con.getHeaderField(header)); 4p8jV*:@{ else ZPsY0IzLo break; ?0NSjK5ma } Ro]IE|Fv } %"Q!5qH& <88}+j hZWK5KwT public void splitterStop() iFG5%>5F { )95yV;n bStop = true; 2U'JzE^Do } :5M}Iz7 3cO[t\/up +g6j=% } )ek 5 XOg(k(&T KOEi_9i} /* DD 5EHJR **FileAccess.java Gu`Vk/& *//文件访问(定位,写) **r? package NetFox; ,,_K/='m import java.io.*; |D`b7h Y"kS!!C>[ UT<bv}(J public class FileAccessI implements Serializable{ Qz) 8eIO: 0D3+R1>_D //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 k*3_)
S
- RandomAccessFile oSavedFile; %4|}&,%%r long nPos; ^Pg
YP WFB|lNf& @\`G & VB public FileAccessI() throws IOException q4GW=@eD { DgT.Lku? this("",0); $;i$k2n: } ]a!; `m$ T:%wX9W PnIvk]"Ab public FileAccessI(String sName,long nPos) throws IOException #D/ }u./ { uU(G_E ? oSavedFile = new RandomAccessFile(sName,"rw"); 8+|V!q this.nPos = nPos; p5;,/
|Ft oSavedFile.seek(nPos); w+9C/U;|s } J=SB/8tQ)T 6a]f&={E oB06{/6 public synchronized int write(byte[] b,int nStart,int nLen) 0/P-> n~ { W|rFl]~a int n = -1; =R;1vUio try{ vYR=TN=Z4
oSavedFile.write(b,nStart,nLen); 0tm_}L$g=b n = nLen; 4a.e
,gitf } e4YfTr catch(IOException e) pL}j
ZTo { 0SCW2/o8 e.printStackTrace (); (zJ$oRq } o*wC{VP_ ";?C4%L 2@m(XT
( return n; v8[ek@ } -?w v}o %Di7u- x ds$ \vSd } :KV,:13`D AV[P QI JIbzh?$aD /* XJlDiBs9=Q **SiteInfoBean.java U~#^ ^ */ >RL6Jbo| package NetFox; `k{ ff w[YkTv :Bv&)RK public class SiteInfoBean { ~?`9i>3W~ K jn& |6(qg5" private String sSiteURL; //Site's URL t`8e#n 9 private String sFilePath; //Saved File's Path =O3I[ private String sFileName; //Saved File's Name A.$VM# private int nSplitter; //Count of Splited Downloading File j^$3vj5E[ d%_78nOh" lQ<#jxp public SiteInfoBean() tU)r[2H2 {//nSplitter的缺省值为5 }OP%p/eY //default value of nSplitter is 5 WrHgF*[ this("","","",5); [Z5}2gB& } DA4edFAuE q(&^9" _]=TFz2O public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) (J^Lqh_ { N1+4bR sSiteURL= sURL; r>Qyc sFilePath = sPath; rq'##`H sFileName = sName; 3vRLg b this.nSplitter = nSpiltter; #zSi/r/=1 0.u9f`04 TM/|K|_ } iB}LnC: S4 k^&$; qrM{b= public String getSSiteURL() Ft"&NtXeZZ { MgH1d&R return sSiteURL; zqvRkMWc M } vSYunI @wEKCn|}o s;-78ejj7 public void setSSiteURL(String value) +YQ~t,/ { FU]8.)`G sSiteURL = value; 3lLW'g&= } +;:aG6q+ "9U+h2#] j:v~MrQ7| public String getSFilePath() mI?* Z%>g { =2;mxJ# o return sFilePath; '.%iPMM } W>q*.9}Y" Jv 6nlK` ~ F?G5cN5 public void setSFilePath(String value) t-eKruj+ { _#J_$CE# sFilePath = value; P^K?E } "LP,
TC 1IOo?e=/bM _gPVmGG public String getSFileName() 2<y}91N: { n!kk~65| return sFileName; XQ0#0<
} u5cVz_S To# E@Nw LY\ddI*s public void setSFileName(String value) 0okO+QU,a { ;B|^2i1Wi sFileName = value; #uD)0zdw } e9z$+h u|m[(-` gJ FR1 public int getNSplitter() B&4fYpn { >+Sv9S return nSplitter; e'k;A{Oh } ueWR/ %jbJ6c *2 qh3 public void setNSplitter(int nCount) _S9rF-9G] { 629~Uc6] nSplitter = nCount; 9atjK4+o }
Z;j/K } ||{T5E-.F 5YTb7M Eu`2w%qz /* 2y9:'c| **Utility.java T@K7DkP@ */ w|!YoMk+o package NetFox; ^f^-.X KAj"p9hq+k _Hz~HoNU public class Utility { iwG>]:K3 3iu!6lC L\/u}]dPQ public Utility() SWNU1x{,c\ { 3o+KP[A L?=#*4t Hk<X } d'N(w7-Y hw&ke$Fg# //线程睡眠 eW\?eq+ `A public static void sleep(int nSecond) Ph(]?MG\_ { XysFwi try{ k%EWkM)? Thread.sleep(nSecond); 2gQY8h8 }
Pcs^@QP catch(Exception e) L
Yh@ u1p { pchQ#GU e.printStackTrace (); i_|9<7a
} ?o2;SY(- } uI%N? +Od1)_'\D3 //日志 *A~($ZtL public static void log(String sMsg) ;jRL3gAe) { [n!$D(|"!V System.err.println(sMsg); 9nT?|n]> } ~/^y.SsWM mV6#!_" <u6c2!I{ public static void log(int sMsg) MZCL:# { .@y{)/ System.err.println(sMsg); bWGyLo, } 6@"Vqm|HD } @IEI%vH >|l;*Kw,/P X4d Xm>*?= /* gbY LA a **TestMethod.java D3<IuWeM */ >}ro[x`K package NetFox; 9b?i
G 3x04JE3! [:AB$l* public class TestMethod { 5Z*
b(R |$YyjYK BhqhyX\D&y public TestMethod() \w{@u)h { ///xx/weblogic60b2_win.exe ,]0S4h67 try{ 17e=GL SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); J)-T:.i|0 //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); ?F!EB4E\y} SiteFileFetch fileFetch = new SiteFileFetch(bean); .i
MnWW fileFetch.start(); 5,F;j<F } cDfx)sL catch(Exception e){e.printStackTrace ();} LiiK3!^i 4st~3,lR$ t{+M|Y } o)0C-yO0qf 77+|#<J ]b}B~jD public static void main(String[] args) CkRyzF { [?;`x&y~y new TestMethod(); TcR=GR*cJ } X7e>Z)l } qIB>6bv#x 点击下载更多相关资料
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