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/* [-Z 6QzT **SiteFileFetch.java xK0;saG# */ [Cd#<Te3 package NetFox; RPMz&/k import java.io.*; Xgh%2;: import java.net.*; qPi $kecx p]X+#I< Nq9pory^ public class SiteFileFetch extends Thread { )6XnxBSH c='W{47 Ib2&L SiteInfoBean siteInfoBean = null; //文件信息Bean Dd0yQgCu long[] nStartPos; //开始位置 b"@-9ke5I long[] nEndPos; //结束位置 nzxHd7NIZ FileSplitterFetch[] fileSplitterFetch; //子线程对象 %1cxZxGT long nFileLength; //文件长度 o9ys$vXt* boolean bFirst = true; //是否第一次取文件 A"DGn boolean bStop = false; //停止标志 -mO<(wfV> File tmpFile; //文件下载的临时信息
})!- DataOutputStream output; //输出到文件的输出流 n9
bp0#K !<h9XccN //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) L})fYVX
public SiteFileFetch(SiteInfoBean bean) throws IOException G,6`:l { zZ9Ei-Q siteInfoBean = bean; 2N-p97"g //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); 4]zn,g?& tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); 902A,*qq if(tmpFile.exists ()) r#j3O}(n {
cMtUb bFirst = false; W|;`R{<I% read_nPos(); oT:wGBW } SANbg&$ else CNj |vYj { F*z>B >{) nStartPos = new long[bean.getNSplitter()]; 8DD1wK\U~ nEndPos = new long[bean.getNSplitter()]; #6y fIvap } _Q\rZ
l 9JMf
T] A$~H`W<yxB i+Ne.h } u<n['Ur}| W#d'SL#5 \4G9fR4 public void run() zB7^L^Y { R))4J //获得文件长度 D}{]5R //分割文件 bA6^RIf? //实例FileSplitterFetch dqU)(T=C //启动FileSplitterFetch线程 a{;+_J3S //等待子线程返回 !}`[s2ji try{ Ss{5'SF)$c if(bFirst) =JTwH>fD { .GYdC' nFileLength = getFileSize(); <vs*aFq if(nFileLength == -1) S"+#=C { j$u System.err.println("File Length is not known!"); N>s3tGh } cjLA7I.O else if(nFileLength == -2) \ z*<^ONq { pxbuZ9w2Q System.err.println("File is not access!"); 1_xkGc-z< } #RdcSrw)W! else <|3F('Q" { ,
P1m# for(int i=0;i<nStartPos.length;i++) >_\]c-~< { DDT]A<WUV nStartPos = (long)(i*(nFileLength/nStartPos.length)); F_}y[Yn^ } }
?+0s=Z for(int i=0;i<nEndPos.length-1;i++) I_Gm2Dd { q|lP?-j nEndPos = nStartPos[i+1]; !t)uRJ } {)Zz4 nEndPos[nEndPos.length-1] = nFileLength; iF:NDqc } +5GC?cW } EN>a^B+! 4dz Ym+vJm Uu`}| &@i //启动子线程 !}eq~3 fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; M.$=tuUL for(int i=0;i<nStartPos.length;i++) o9{1_7K { s}^W2 fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(),
j)mS3#cH siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), #5{lOeN nStartPos,nEndPos,i); Q\^BOdX^` Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); 4/x.qoj fileSplitterFetch.start(); wqE2n } =xH>,-8} // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), ZTGsZ}{5 siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); Qc
1mR\.5 // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", _=qk.| p/ nEndPos = " + nFileLength); +jGUp\h%9; // fileSplitterFetch[nPos.length-1].start(); Vx n- 1ww~!R &9n=!S'Md //等待子线程结束 ;[,#VtD //int count = 0; 2Aq+:ud)P //是否结束while循环 !uKuO boolean breakWhile = false; z)&&Ym# ]V"B`ip[2 lb)i0`AN+ while(!bStop) w 3L+7V,! { @^Kw\s write_nPos(); QSo48OFs Utility.sleep(500); ]`@<I'?,X breakWhile = true; ehX4[j6 KXo[;Db)k 4d-"kx3X for(int i=0;i<nStartPos.length;i++) 6A} 45 { BLo=@C%w5 if(!fileSplitterFetch.bDownOver) "L)?dlb6T { Nu}Zsb|{ breakWhile = false; {f>e~o
break; ]"vpCL } nlx~yUXL4 } j+3=&PkA.] if(breakWhile) )5U7w break; [4}U*\/>C *_uGzGB&G ];Bk|xJ/> //count++; qS[nf>" //if(count>4) kPp7;U2A // siteStop(); 6)3pnhG9 } 74~%4 Xu[A,6 o l+*Oe System.err.println("文件下载结束!"); SM`n:{N( } .ffb*gZ4 catch(Exception e){e.printStackTrace ();} W%}zwQ } Nu%MXu+ sTYA qP[jtRIN //获得文件长度 y-:d`>b>\ public long getFileSize() (M t-2+"+ { f@xjNm*'Z int nFileLength = -1; K~\Ocl try{ i"y @Aj!7 URL url = new URL(siteInfoBean.getSSiteURL()); oSs~*mf HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); !o`h*G-x httpConnection.setRequestProperty("User-Agent","NetFox"); #Bas+8
@, LZ~}*}jy meyO=> int responseCode=httpConnection.getResponseCode(); ;U<rFs40 if(responseCode>=400) Qnv)\M1 { 5q.)K
f+ processErrorCode(responseCode); zAd%dbU| return -2; //-2 represent access is error )>^!X$`3 } sMWNzt y)+lU h!]=)7x; String sHeader; i}LVBx"K( Bjsg!^X7 \w@ "`!% for(int i=1;;i++) ,S=ur% { Md1ePp] //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); oei2$uu //Utility.log(in.readLine()); #;>v,Jo sHeader=httpConnection.getHeaderFieldKey(i); 8Nf%<nUv if(sHeader!=null) /:aY)0F0<& { YZ^;xV if(sHeader.equals("Content-Length")) ft4(^|~ { 32,Y3!% nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); )Es|EPCx! break; sxU
0Fg } kR;Hb3hb } QpMi+q
Y else um1xSf1Xv break; kG3m1: : } QetyuhS~ } _{YUWV50} catch(IOException e){e.printStackTrace ();} IX 2 dic' catch(Exception e){e.printStackTrace ();} =$Sd2UD O/PO?>@-/ 6^"Spf] Utility.log(nFileLength); </jTWc'} qgw)SuwW 77p8|63 return nFileLength; Dt*/tVF } 3 etW4 @
M o0F&,|' //保存下载信息(文件指针位置) 5TS&NefM private void write_nPos() W 33MYw { #w#:f try{ 4:Id8rzz output = new DataOutputStream(new FileOutputStream(tmpFile)); ?=0BU} output.writeInt(nStartPos.length); h_K!ch} for(int i=0;i<nStartPos.length;i++) JWvL { c^EU&q{4 // output.writeLong(nPos); F>s5<pKAX output.writeLong(fileSplitterFetch.nStartPos); ,ftKRq output.writeLong(fileSplitterFetch.nEndPos); #hF(`oX}4K } @j=Q$k.GF output.close(); jS| 9jg: } zP|^) h5 catch(IOException e){e.printStackTrace ();} <K zEn+ catch(Exception e){e.printStackTrace ();} ,FDRU }
MON]rj7 )TzQ8YpO} 6ly`lu9 //读取保存的下载信息(文件指针位置) n]fMl:77 private void read_nPos() wj<fi { 6k*,Yei try{ Ni-@El99 DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); @pO2A6Ks int nCount = input.readInt(); 4|Ay;}X \ nStartPos = new long[nCount]; #8qhl nEndPos = new long[nCount]; .FpeVjR'' for(int i=0;i<nStartPos.length;i++) ?I332,,q { T43Jgk, nStartPos = input.readLong(); GEUC<bL+ nEndPos = input.readLong(); S<UWv@`U" } 0;2"X[e input.close(); @PAT|6 } 2*ByVK catch(IOException e){e.printStackTrace ();} ;HoBLxb P
catch(Exception e){e.printStackTrace ();} .l$:0a } 5v,_ Hgh R-J^%4U`7 w0`8el; private void processErrorCode(int nErrorCode) #l#8-m8g) { ?]PE!7H System.err.println("Error Code : " + nErrorCode); ?n(OH~@$i } + Un(VTD yU'<b.] Ws*UhJY<GS //停止文件下载 =a^}]k} public void siteStop() :.aMhyh#* { p;n"zr8U bStop = true; 2v?fbrC5c for(int i=0;i<nStartPos.length;i++) D,P{ ,/ fileSplitterFetch.splitterStop(); JK'FJ}Z4 l~Rd\.O szC<ht?z } X)b@ia'"Wp } 7B{LRm6;Vu //负责部分文件的抓取 2R];Pv **FileSplitterFetch.java 8(ej]9RObU */ )J{.z package NetFox; |Q+:vb: HvzXAd
jH>`: import java.io.*; v8f1o$R import java.net.*; _=-B%m V;29ieE! 3>QkO.b public class FileSplitterFetch extends Thread { w?:tce @A'@%Zv- 'M!M$<j String sURL; //File URL a]nK!;>$ long nStartPos; //File Snippet Start Position ?/|KM8 long nEndPos; //File Snippet End Position '8w>=9Xl int nThreadID; //Thread's ID a&RH_L jM boolean bDownOver = false; //Downing is over )9i$ 1"a( boolean bStop = false; //Stop identical MUn(ZnQy| FileAccessI fileAccessI = null; //File Access interface z}w7X6&e #pcgfVl `IV7\}I| public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException R9\ )a2 { y4)iL?!J~ this.sURL = sURL; M>[e1y>7 this.nStartPos = nStart; z"P/Geb:O this.nEndPos = nEnd; +h08uo5c nThreadID = id; nM|Cv fileAccessI = new FileAccessI(sName,nStartPos);//定位 E.N } #f<3[BLx y#zO1Nig` Z5|BwM public void run() 7>lM^ :A { .F},Z[a& while(nStartPos < nEndPos && !bStop) [h63* & { Z7XFG&@6 T.}Y&,n$$5 F.),|t$\ try{ s@IgaF { URL url = new URL(sURL); }`.d4mm HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); &EmG\vfE httpConnection.setRequestProperty("User-Agent","NetFox"); gCq'#G\Z String sProperty = "bytes="+nStartPos+"-"; T>68 ,; p httpConnection.setRequestProperty("RANGE",sProperty); ,&.$r/x|? Utility.log(sProperty); +/ rt'0o C),i#v 2Gh&h( InputStream input = httpConnection.getInputStream(); lg
+ >.^7k //logResponseHead(httpConnection); JED\"(d( YD;G+"n?T \@[,UZ byte[] b = new byte[1024];
T~L&c int nRead; e|N~tUVrrN while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) R$X~d8o>% { O,JS*jXl nStartPos += fileAccessI.write(b,0,nRead); GZ^Qt*5 { //if(nThreadID == 1) T@A Qe[U'v // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); *:"@ } :gO5#HIm />6ECT m!5Edo-;< Utility.log("Thread " + nThreadID + " is over!"); u}b%-:- bDownOver = true; >x>/}` //nPos = fileAccessI.write (b,0,nRead); 9dmoB_G } u'nQC*iJb catch(Exception e){e.printStackTrace ();} $,P:B%] } J$5Vjh'aM } %&S9~E
D 2VzYP~Jg #q4uS~ //打印回应的头信息 df!i}L public void logResponseHead(HttpURLConnection con) ^t:dcY7 { 2RQ-L for(int i=1;;i++) PV:J>!] { F$bV}>-1k String header=con.getHeaderFieldKey(i); 7[PEiAI if(header!=null) A=3L_
#nO //responseHeaders.put(header,httpConnection.getHeaderField(header)); :bm%f%gg Utility.log(header+" : "+con.getHeaderField(header)); &d0sv5&s else 4jt(tZS break; mRa\ wEg% } 0<O()NMv } )2_[Ww|. c]zFZJ6M NBHpM}1xtU public void splitterStop() Uo71C 4ev { `BVmuUMm bStop = true; FgL892[ } 7i!Vg V !I.}[9N '%82pZ,? } Nte$cTjX #*:^\z_Jd $xWUzg1<U /* Qe{w)e0}` **FileAccess.java `XpQR=IOMb *//文件访问(定位,写) z$WLx package NetFox; k/D{&(F ~ import java.io.*; 5'c#pm\Q 4Y$\QZO le]~Cy0 public class FileAccessI implements Serializable{ :eSsqt9]9 &7oL2Wf //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 7[w<v(Rc RandomAccessFile oSavedFile; - Z`RKR8C long nPos; H>A6VDu IzJq:G. 9v[V"m`M public FileAccessI() throws IOException N!Rt040.% { }zx
~ this("",0); VX&PkGi?o } QeG9CS)E}j |?ssHW !~yBzH;K public FileAccessI(String sName,long nPos) throws IOException fum.G{} { Z Cjw)To( oSavedFile = new RandomAccessFile(sName,"rw"); U2A
82;Z this.nPos = nPos; L- !1ybB^ oSavedFile.seek(nPos); (v%24bv } Q{RmE: H=Ilum06 KVJ,
a public synchronized int write(byte[] b,int nStart,int nLen) (Xcy/QT { ? ep#s$i int n = -1; i5t6$|u:&m try{ f+Sb>$ oSavedFile.write(b,nStart,nLen); -~|{q)!F n = nLen; c#sHnpP } YT
Zi[/ catch(IOException e) o]Rlivahm { d.^g#&h e.printStackTrace (); (XQuRL<X } 6:O<k2=2 }}{n|l+R5 8v4 o+wP return n; #5Z`Q^ } IF|6iKCE yjg&/6 6FQi=}O 1 } 8.#{J&h s:Ml\['x +7^p d9F. /* 1J4Pnl+hN **SiteInfoBean.java -(8I ?{"4i */ :t{~Mi=T package NetFox; ]MV8rC[\ <aJQV)]\ wDZ<UP=X public class SiteInfoBean { 67YC;J]n=z o^\Pt<~W 0(D^NtB7 private String sSiteURL; //Site's URL /v8Q17O?e private String sFilePath; //Saved File's Path 4
"HX1qP private String sFileName; //Saved File's Name 1!~cPD'F private int nSplitter; //Count of Splited Downloading File Y~-y\l;Tr Ve3z5d:^ UtQey ;w public SiteInfoBean() >F7w]XH {//nSplitter的缺省值为5 >sfg`4 //default value of nSplitter is 5 >H!Mx_fDL this("","","",5); BVNW1<_: } V@G#U[D N8b\OTk2 fI613ww] public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) hTr5Q33y> { .h7s.p? sSiteURL= sURL; g[3LPKQ sFilePath = sPath; ]R#:Bq!F sFileName = sName; ~ELMLwn. this.nSplitter = nSpiltter; [|DKBJ 8AuBs;i ]
3"t]U'f } c+9L6}D 6<._^hyq "6$V1B0KW public String getSSiteURL() MC}t8L= { @1JwjtNk return sSiteURL; hj [77EEz } - {QU>`2 l@4_D;b3o" u dZOg public void setSSiteURL(String value) ;Y$>WKsV { &12KpEyf sSiteURL = value; _\ToA9 m } sjr,)|#[ ;uUFgDi :8A+2ra& public String getSFilePath() Ey&H?OFiP { d;Vy59}eY return sFilePath; G%<}TI1} } Nr~$i% [ N{;!xIv ;sZG=y@ public void setSFilePath(String value) /\I6j;$z { ;]>kp^C# sFilePath = value; E-bswUVaEE } z)qYW6o% tS'lJu / (&E public String getSFileName() Oj5UG* { jT{T#_ return sFileName; %ou,|Dww } `>g G"1,]
wA"@t 'o>)E> public void setSFileName(String value) K}~$h,n { zX>W 8P sFileName = value; >lQo _p(; } x sryXex; I`kfe`_ 9DxHdpOk public int getNSplitter() `8:)? 0Ez { zfIo]M` return nSplitter; O
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\+xXb{ >XD?zF)6 public void setNSplitter(int nCount) Ott6y { 5)k8(kH nSplitter = nCount; uN|A}/hr] } pP. _%5 } d7OygDb < MMM
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v /* `fu_){ **Utility.java @I_cwUO */ I{Zb/}k- package NetFox; RLmOg{L ^X=Q{nB y+k_&ss public class Utility { !#tVQ2O &`"DG$N( IC`3%^ public Utility() diq}\'f
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V^gFes } p@m0Oi,= z:Ml;y //线程睡眠 bz4Gzp'6k public static void sleep(int nSecond) Hq3|>OqC2Q {
*LT~:Gs# try{ _5oTNL2 Thread.sleep(nSecond); F^i3e31*t } d+9V% T catch(Exception e) ]ss[n.T0* { zA,vp^ e.printStackTrace (); CWj_K2=d } Av X1* } N'Gq9A XHr*Rs.[= //日志 w+M/VsL public static void log(String sMsg) Wh[QR-7Ew { [BWq9uE System.err.println(sMsg); 54
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public static void log(int sMsg) ( xs'D4 { pGbfdX
System.err.println(sMsg); !ifU}qFzK } DeO-@4+qKd } FXQWT9Kk~_ ke4E1T-1n LCF}Y{ /* j]u!;] **TestMethod.java \Z-th,t */ y7Po$ )8l package NetFox; 3uL
f0D F'bwXb** }K {1Bm@S public class TestMethod { iHa?b2=) =u.@W98, K E$d#4x public TestMethod() 5E!C?dv(z { ///xx/weblogic60b2_win.exe &5CRXf try{ 5ut| eD`3 SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); L*@`i ]jl //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); 3Cf9'C SiteFileFetch fileFetch = new SiteFileFetch(bean); 5cSiV7#Y: fileFetch.start(); b?H"/Mu. } |;ztK[( catch(Exception e){e.printStackTrace ();} c4JV~VS+ j-<]OOD ]vrZGX
a+ } ER0
Yl du65=w4E! ?OD$`{1 public static void main(String[] args) ]#tB[G { L9GLjRp- new TestMethod(); :@A&HkF } u'YXI="( } x/|W;8g4 点击下载更多相关资料
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