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/* .w=:+msL{( **SiteFileFetch.java V=Ww> */ " Tw0a! package NetFox; re2Fv:4{ import java.io.*; V&$ J; import java.net.*; Rqt[D @;m '&1 u>j 5`OXo public class SiteFileFetch extends Thread { DPR;$yV z;``g"dSw [Ja(ArO3|[ SiteInfoBean siteInfoBean = null; //文件信息Bean ,$ho2R),Fn long[] nStartPos; //开始位置 MJpP!a^Q long[] nEndPos; //结束位置 ye56-T FileSplitterFetch[] fileSplitterFetch; //子线程对象 Kn3YI9 long nFileLength; //文件长度 $&c<T4 $d boolean bFirst = true; //是否第一次取文件 R'jUS7]Y boolean bStop = false; //停止标志 o$^O<z L File tmpFile; //文件下载的临时信息 A;b=E[iv DataOutputStream output; //输出到文件的输出流 p,!fIx V_7Y1GD //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) zLE>kK public SiteFileFetch(SiteInfoBean bean) throws IOException /[p?_EX@ { #%9oQ6nO siteInfoBean = bean; *tIdp`xT/T //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); m[//_TFf] tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); UA1]o5K if(tmpFile.exists ()) ^/ULh,w!fP { w50.gr7 bFirst = false; OYQXi read_nPos(); ?*(r1grHl } ptnMCF else sj?`7kg { A8CIP:Z nStartPos = new long[bean.getNSplitter()]; V!j K3vc nEndPos = new long[bean.getNSplitter()]; _3-RoA'UZr } ym-lT|>Z
3J'Bm" ,k`YDy|#e m? ]zomP } Ncs4<"{$ ?HEo9/ *7 '2Mjz6mBDA public void run() #3 }5cC8_ { ir( -$*J //获得文件长度 S&;T_^| //分割文件 {Zd)U " //实例FileSplitterFetch ui0J}DM //启动FileSplitterFetch线程 L<{OBuR //等待子线程返回 n0>5'm%ES try{ YL0WUD_> if(bFirst) !HT> { %B*<BgJ;4F nFileLength = getFileSize();
Q 37V! if(nFileLength == -1) ySPlyhGF { WOe{mwhhj System.err.println("File Length is not known!"); 24.7S LXO } 4w?]dDyc% else if(nFileLength == -2) @ ~0G$ { T<9dW?'| System.err.println("File is not access!");
$\JQGic` } A>ug'. else XSL
t;zL: { k:(e79 for(int i=0;i<nStartPos.length;i++) xIq"[?m { &+|jJ{93z nStartPos = (long)(i*(nFileLength/nStartPos.length)); 75^)Ni } UeK,q>i for(int i=0;i<nEndPos.length-1;i++) 5Tcl<Y6l { [TpA26#TTO nEndPos = nStartPos[i+1]; tDuUAI54 } CBz(hCaI nEndPos[nEndPos.length-1] = nFileLength; f6dE\ } cN[q)ts } CguU+8]
zO7lsx2= Rd;~'gbG //启动子线程 %Hl:nT2M fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; 3=G5(0 for(int i=0;i<nStartPos.length;i++) y~#R:&d" { 7#~m:K@ fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), (<g;-pZH% siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), Np5/lPb1 nStartPos,nEndPos,i); =%#$HQ= Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); /4f 5s#hR fileSplitterFetch.start(); pRDON)$ } leX7(Y;!a7 // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), C4X{Ps\ siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); }.Na{]<gh // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", C7c|\ T nEndPos = " + nFileLength); oto
wvm // fileSplitterFetch[nPos.length-1].start(); zwniS6R1 k8t Na@H 0W<nE[U //等待子线程结束 hD9'`SQ //int count = 0; sWpRX2{5, //是否结束while循环 nw]e_sm boolean breakWhile = false; \CEnOq 6LF^[b/u #u]_7/(</` while(!bStop) 2Xq!'NrS { x:&L?eOT write_nPos(); tp,mw24 Utility.sleep(500); ngH~4HyT breakWhile = true; c?3F9w# ck4T#g;= 9DP75 ti for(int i=0;i<nStartPos.length;i++) wYS
KtG~/S { "YdDaj</ if(!fileSplitterFetch.bDownOver) |WwFE|< { dBD4ogo1 breakWhile = false; \qK}(xq[ break; +%cr?g } 8d*<Aki?; } KWuj_.; if(breakWhile) xa%ktn break; {bq-: CZe j}x
O34 =ty@xHr //count++; M $5%QM} //if(count>4) 0z<]\a4 // siteStop(); 5M.n'* } 4|o{_g[ aR(Z~z;C q0KXuMK System.err.println("文件下载结束!"); J9KLO= } bZ@53 catch(Exception e){e.printStackTrace ();} Xy(SzJ% } %n`iA7j$W vM>`CZ /j5-
"<;. //获得文件长度 NcY0pAR* public long getFileSize() k;Ny%%5 { 3~1lVU: int nFileLength = -1; (P52KD[A[ try{ fylA0{ URL url = new URL(siteInfoBean.getSSiteURL()); c%,6L <[ HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); 3x;y}:wQa httpConnection.setRequestProperty("User-Agent","NetFox"); C9;X6 $\J9F=<a {p_vR/yN int responseCode=httpConnection.getResponseCode(); #o |&MV_j if(responseCode>=400) r1H['{$ { CR8r|+(8 processErrorCode(responseCode); \oZUG return -2; //-2 represent access is error QT&Ws+@
s{ } ah$7
Oudj 1#X=&N :@807OYzy String sHeader; kG7,1teMk $(mdz)Cfy =&g}Y for(int i=1;;i++) aD3F!Sn { v]Q_ //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); (,9cCnvmYU //Utility.log(in.readLine()); k)GuMw sHeader=httpConnection.getHeaderFieldKey(i); \fFy$ if(sHeader!=null) 1?#p !;& { z?> y if(sHeader.equals("Content-Length")) M,!no { vz_g2.7l\ nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); W%<]_u[-} break; 0-; P&m!! } ~ z&A } E#F9<=mA) else H5MAN,` break; 58ZiCvqv } ?)QBJ9F } W[Ew6)1T catch(IOException e){e.printStackTrace ();} AT'$VCYC( catch(Exception e){e.printStackTrace ();} +jZg%$Q!# N#!1@!2BN 7Mg7B Utility.log(nFileLength); KGLhl;a GyM%vGl
3 v.&*z48 return nFileLength; }eRG$)' } kvVz-PJy rQ@o cb&In<q //保存下载信息(文件指针位置) teNQUIe- private void write_nPos() bRe *( { Saq>o. try{ v?"ee&Y6 output = new DataOutputStream(new FileOutputStream(tmpFile)); EKJ4_kkjM output.writeInt(nStartPos.length); E/-Kd!|" for(int i=0;i<nStartPos.length;i++) W%ZU& YBc { l*MUDT@M8\ // output.writeLong(nPos); v?=VZ~`O( output.writeLong(fileSplitterFetch.nStartPos); P\0%nyOG(% output.writeLong(fileSplitterFetch.nEndPos); *H<g9<Dn } QgM_SY|Rj output.close(); ~g6[ [ } c'TLD!^hB catch(IOException e){e.printStackTrace ();} =WRU<`\ catch(Exception e){e.printStackTrace ();} R6o<p<fTh } 5 9HaTq x9
L\" . pEeR //读取保存的下载信息(文件指针位置) g;Q^_4@ private void read_nPos()
]p.f*] { NGZ>: try{ "/h"Xg>q DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); NJ!#0[@C int nCount = input.readInt(); M\4;d # nStartPos = new long[nCount]; c)YGwkY,, nEndPos = new long[nCount]; #;\;F PuZ for(int i=0;i<nStartPos.length;i++) `%I{l { ##ea-"m8 nStartPos = input.readLong(); #/=yz<B nEndPos = input.readLong(); 3t6'5{ } yk6UuI^/ input.close(); #{cpG2Rs } yj9gN}+ catch(IOException e){e.printStackTrace ();} Rk0rHC6[ catch(Exception e){e.printStackTrace ();} Y[]t_o) } {NqGWkGt*b w:@M|O4` <:t\P. private void processErrorCode(int nErrorCode) +ANIm^@ { S.>9tV2Ca System.err.println("Error Code : " + nErrorCode); +-137!x\q } #$)rwm.jW? H
pfI =W^L8!BE' //停止文件下载 Z6ex<[`I public void siteStop() ?kefRev<#h { R6.#gb8^oS bStop = true; Q'M Ez for(int i=0;i<nStartPos.length;i++) 3!UP>,! fileSplitterFetch.splitterStop(); 3`q`W9 oob0^}^ j2n@8sCSO } ]}c=U@D,9 } . M$D //负责部分文件的抓取 a{.n(M **FileSplitterFetch.java pD/S\E0@t */ 9}_f\Bs package NetFox; DYl{{L8@ `t2! M\) CU&,Kq@ import java.io.*; 9xp
;$14 import java.net.*; |?W +:Zi(SuS] Ik)Q0_<a public class FileSplitterFetch extends Thread { "&|2IA ] 6B!eB
! |{"7/~*[ String sURL; //File URL !A0bbJ long nStartPos; //File Snippet Start Position rnaDo\5 long nEndPos; //File Snippet End Position 9?6$ 2I int nThreadID; //Thread's ID . r"?w boolean bDownOver = false; //Downing is over 9>P(eN boolean bStop = false; //Stop identical [!
BH3J! FileAccessI fileAccessI = null; //File Access interface IGQ8-#= 0~+k _xsYcw~) public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException vBXr[XoC {
H:Le^WS this.sURL = sURL; ,' B=eY, this.nStartPos = nStart; gC 4#!P this.nEndPos = nEnd; (k45k/PAP nThreadID = id; =,]M$M fileAccessI = new FileAccessI(sName,nStartPos);//定位 2F{IDcJI\ } .[A S =0Sa ~`.%n7 public void run() |XZf:}q5: { u9(AT>HxT while(nStartPos < nEndPos && !bStop) 9$i`B>C~ { ;& +75n ?^p8]Va% D._r@~o try{ ks4
,2f,2 URL url = new URL(sURL); n4,J#h/ HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); %9M49s httpConnection.setRequestProperty("User-Agent","NetFox");
x$I>e String sProperty = "bytes="+nStartPos+"-"; MG>;|*$% httpConnection.setRequestProperty("RANGE",sProperty); ,//=yW Utility.log(sProperty); =G6@:h= #n
r1- sf| M$9h)3(B InputStream input = httpConnection.getInputStream(); y0]O 6.{ //logResponseHead(httpConnection); sqRuqUj+ G=e[TR)i y
6<tV. byte[] b = new byte[1024]; qMOD TM~+ int nRead; Hy'&x?F6 while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) _L>n!"E/ { o~p^`5# nStartPos += fileAccessI.write(b,0,nRead); (ShJ! //if(nThreadID == 1) 4LLCb7/5lP // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); pDQ,v" } ^<-SW]x ;{RQ+ZX'[ j*}xe'# Utility.log("Thread " + nThreadID + " is over!"); M-hnBt bDownOver = true; r9[J3t*({~ //nPos = fileAccessI.write (b,0,nRead); g;T`~
} pz+#1=b] catch(Exception e){e.printStackTrace ();} ?*=Jq } tTal<4 } uDR(^T{g# 10(N|2'q uQCS%|8C //打印回应的头信息 ]LjW,b" public void logResponseHead(HttpURLConnection con) Re_.<_$ { C4,W[L]4" for(int i=1;;i++) =9-c*bL { vr$[ String header=con.getHeaderFieldKey(i); '"Gi&:*nQ< if(header!=null) ko$R%W&T //responseHeaders.put(header,httpConnection.getHeaderField(header)); =8-e1R/ Utility.log(header+" : "+con.getHeaderField(header)); -L@=j else zuw6YY8kQ break; :O2N'vl47A } XT)@)c7j } `KN{0<Ne %BJ V$tO "PPwJ/L( public void splitterStop() #%~wuCn<K { u}$3.]-.?T bStop = true; kmwFw># } ~Q5HM Wp $\> *&s_u)b } FsjblB3?E &>SE9w/?o r.[k D"l /* }tN"C 3)@ **FileAccess.java Flsf5 Tr0 *//文件访问(定位,写) HXX"B,N package NetFox; TD<. :ul] import java.io.*; 3 }XS|Y 'tekne 3~ylBJJ public class FileAccessI implements Serializable{ occ}|u Pg7/g=Va //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 [LE_lATjU RandomAccessFile oSavedFile; 3$_wAt4w long nPos; Ad(j&P idHBz*3~ps YRFM1?* public FileAccessI() throws IOException 6B=J*8
Hs { h8Gp>b this("",0); w5p+Yx=q } /n_N`VJ7H HjrCX>v lq74Fz&( public FileAccessI(String sName,long nPos) throws IOException &12.| { 92EvCtf oSavedFile = new RandomAccessFile(sName,"rw"); R"jX9~3Ln this.nPos = nPos; $4m{g"xL oSavedFile.seek(nPos); z?7pn}- } Lq:Z='Kc ]`%cTdpLj o4xZaF4+ public synchronized int write(byte[] b,int nStart,int nLen) ral0@\T { >Gkkr{s9 int n = -1; =Z 2sQQVS try{ tq{
aa oSavedFile.write(b,nStart,nLen); rc"yEI-``" n = nLen; qSON3Iid } ^vUdf.n9 catch(IOException e) d:3G4g { WK-WA$7\ e.printStackTrace (); 6H@=O1W } ]O^!P,l)" rxO|k0x^C _("{fJ,A return n; l&zd7BM9( } a4?:suX$ P:=3;d{v ,{$:Q}` } 7P=j2;7 v tcfUhSz,I RDZl@ps8 /* koFY7;_<? **SiteInfoBean.java k@^)>J^ */ R4{2+q=0 package NetFox; )]'?yS" E1=]m Lf3:' n public class SiteInfoBean { cJ&%XN o@}Jd0D4 Wcbb3N$+ private String sSiteURL; //Site's URL +PjH2 private String sFilePath; //Saved File's Path vV8}> private String sFileName; //Saved File's Name 7^=O^!sa private int nSplitter; //Count of Splited Downloading File 0EOpK%{ M%Ov6u<I8 tT'+3 public SiteInfoBean() aB.`'d)V {//nSplitter的缺省值为5 7cH[}v`pn //default value of nSplitter is 5 xI$B",?( this("","","",5); 'F1NBL } A#*0mJ8IK mV6\gR[h ht` !@B public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) \xwE4K { +c?1\{M sSiteURL= sURL; XDU&Z2A sFilePath = sPath; {2A/ @$? sFileName = sName; z>~Hc8*]3 this.nSplitter = nSpiltter; ?Yxk1Y4ig) jT%k{"+>+? i!9yN:m0 } K[O'@v ^8-CUH\ s-[ _% public String getSSiteURL() xDm^f^}> { =JY9K0S~ return sSiteURL; wj/OYnMw } }sZme3*J[ y]yp8Bs+ x pT85D public void setSSiteURL(String value) #)z_TM07P { pPUKx=d sSiteURL = value; D3N\$ D } 6Dwj^e0 _Uc le Srg`Tt] public String getSFilePath()
v[\'
M { wS9EC}s:Q return sFilePath; b$[O^p9x } BNL Q] {fmSmD
q,A; d^g public void setSFilePath(String value) A46Xei:Ow { f
0D9Mp sFilePath = value; _ 7X0 } k%Jv%m}aB Mt"j< ]EW C;QIp6"1 public String getSFileName() 0x*L"HD { _gxI=EYi return sFileName; _Gvn1"l } |5^tp e4ym6q<6! kO>F, M public void setSFileName(String value) MIGcV9hf { (< gk<e* sFileName = value; gZ8n[zxf6 } hi^@969 ~RgO9p(dY Us P1bh4 public int getNSplitter() E|P { !lpKZG return nSplitter; !36jtKdM } 4Hc+F( q$7SJ.pF R9%Um6 public void setNSplitter(int nCount) lu2"?y[2 { <?znk8| nSplitter = nCount; 6qp2C]9= } VPBlU } ZUPlMHc pCb3^# &o /Sy:/BQ /* WrP4*6;" **Utility.java KG=h!]Meq */ *uoc;6 package NetFox; OiAP%7i9 OFH!z{* [Vzp D 4 public class Utility { FtHR.S=u IY jt*p5 rXgU*3RG public Utility() D;
i%J { T$)N2]FE i^`]TOP ^FJ.C|l( } y(!J8(yA `IN/1=]5 //线程睡眠 AM?62 public static void sleep(int nSecond) `0'Bg2' { 2vbm=~)$F try{ pH!e<m Thread.sleep(nSecond); MOp06 } fg}&=r catch(Exception e) C
0@tMB7 { MhT.Zg\ e.printStackTrace (); ti%uyXfja } (^,4{;YQ5 } u6tD5Y !5FZxmUup //日志 y{{7)G public static void log(String sMsg) Tp-<!^o4 { ,-({m' System.err.println(sMsg); :70n% 3a } bUJ5jkZ) 5^:N]Mp" fZ8at public static void log(int sMsg) z;fi { /8](M5X]f System.err.println(sMsg); 5BWO7F0v" } vuP.V# } \l$gcFXb x.J%
c[Q8 x|3f$
=b /* y<#?z 8P **TestMethod.java #RIo63 */ n\CQ-*;l package NetFox; 6<E4?<O% 2pu8')'P g3*" ^C2= public class TestMethod { Y5rR H#zsk*=QD Dl/Jlsd@ public TestMethod() 7=Vs1TVc { ///xx/weblogic60b2_win.exe ;}/@ar7s3 try{ KNH.4A , SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); {Ftz4y)6 //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); 4^|;a0Qy] SiteFileFetch fileFetch = new SiteFileFetch(bean); WcE{1&PXx fileFetch.start(); L!fiW`>0G } *p&c}2' catch(Exception e){e.printStackTrace ();} 8Df(|>mK TttD}`\. +aa( YGL } {Vg8pt gtizgUS7 MGoYL\ public static void main(String[] args) <|,0%bq)| { 8
oK;Tzh new TestMethod(); P8Nzz(JF } XnBpL6"T` } Ry5/O?QL 点击下载更多相关资料
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