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/* OF!n}.O( **SiteFileFetch.java W[73q>' */ 7Uh/Gl package NetFox; D;DI8.4`N import java.io.*; dFnu&u" import java.net.*; P>*`<$FR `DP4u\6_ {E1^Wn1M public class SiteFileFetch extends Thread { ^p\n/#B XJ7mvLM; %w/:mH3FA SiteInfoBean siteInfoBean = null; //文件信息Bean K!!#";Eo long[] nStartPos; //开始位置 ;@[ax{ J long[] nEndPos; //结束位置 emS7q|^ FileSplitterFetch[] fileSplitterFetch; //子线程对象 >~G _'~_f long nFileLength; //文件长度 %i.;~> boolean bFirst = true; //是否第一次取文件 wF['oUwHH boolean bStop = false; //停止标志 $\nAGmp@ File tmpFile; //文件下载的临时信息 \!r,>P DataOutputStream output; //输出到文件的输出流 c 9zMI k3e?:t 9 //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) rPJbbV",+^ public SiteFileFetch(SiteInfoBean bean) throws IOException nqib`U@" { ~_4$|WKl siteInfoBean = bean; {'f=*vMI //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); MrS~u tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); l;;"v) C8 if(tmpFile.exists ()) r@H7J 5<Y- { ;J?zD9 bFirst = false; .+`Z:{:BC& read_nPos(); 1jj.oa] } +"[}gss!@ else gG,gL9o { SRyot:l
nStartPos = new long[bean.getNSplitter()]; ]y/!GFQ nEndPos = new long[bean.getNSplitter()]; fq[,9lK } 9m2Yrj93 <\5E{/7Tl "3uPK$ SBG.t: } 9%bqY9NFd W}> wRy /y5a~3 public void run() +{{'3=x9 { *JY2vq //获得文件长度 Q-$EBNz //分割文件 f`,isy[ //实例FileSplitterFetch FZJ sZeO //启动FileSplitterFetch线程 "]1|%j //等待子线程返回 2c8e:Xgv try{ .h>tef if(bFirst) 7?~*F7F { 4-\gha nFileLength = getFileSize(); /Os;, g if(nFileLength == -1) @:G#[>nKe { L ]Dl}z System.err.println("File Length is not known!"); soB5sFt&] } 9uA2M!~i2 else if(nFileLength == -2) Zd[6-/-: { 4.i< `' System.err.println("File is not access!"); WH0$v#8`v } 3Qoa?* else *bTR0U { `1U?^9Nf for(int i=0;i<nStartPos.length;i++) D TSK*a ` { CXhE+oS5z' nStartPos = (long)(i*(nFileLength/nStartPos.length)); a*KJjl?k } pksF|VS for(int i=0;i<nEndPos.length-1;i++) dfA4OZ& { c=\H&x3X nEndPos = nStartPos[i+1]; .VfBwTh7q8 } gye'_AR?k nEndPos[nEndPos.length-1] = nFileLength; \y0uGnmCj } ]tDuCZA } ?Y#x`DMh '/H+ |a[Id //启动子线程 Cdbh7 fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; LuUfdzH for(int i=0;i<nStartPos.length;i++) KZt4 dr { }6^d/nE*T
fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), Oxhc!9F siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), dQH9NsV7g nStartPos,nEndPos,i); P[bj{lo Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); XCU>b[Cj, fileSplitterFetch.start(); #[aHKq:?b } I^yInrRh5 // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), uf&Ke
k, siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); K
trR+: // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", fp2.2 @[ nEndPos = " + nFileLength); I2<t?c:Pn< // fileSplitterFetch[nPos.length-1].start(); 0!!z'm3
vd}Y$X (}NKW //等待子线程结束 r1QLSD]i6 //int count = 0; 8 ,<F102( //是否结束while循环 ~xaPq=AH boolean breakWhile = false; 1 n<7YO7} Y)]x1I ;p4|M while(!bStop) (*\*7dIo { v08Xe*gNU write_nPos(); 2W 9N-t21 Utility.sleep(500); xxC2F:Q?U breakWhile = true; n%Gk
{h5 i*g>j <` 1'>wrGr for(int i=0;i<nStartPos.length;i++) b"C1 { [N4#R if(!fileSplitterFetch.bDownOver) ^;]Q,*Q { ct#3*] breakWhile = false; LU7d\Ch break; z7'C;I } 1'{A,! } BVk&TGa;[$ if(breakWhile) 8LM 91 break; /MUa
b*h vuE 1(CR U4hFPK< //count++; +Tug.[A //if(count>4) pN
^^U[ // siteStop(); pAd 8-a } Xitsbf=Gg u= u#6% ^dF?MQA<@ System.err.println("文件下载结束!"); eURj'8o), } CHPu$eu catch(Exception e){e.printStackTrace ();} CVyE5w } OLS. 0UEc [Q5>4WY a
J&)-ge //获得文件长度 3Bk_4n public long getFileSize() @L ,hA
v^ { 4)XZ'~| int nFileLength = -1; 2!+saf^-, try{ m$X0O_*A URL url = new URL(siteInfoBean.getSSiteURL()); qz
.{[l HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); +7]]=e<[E httpConnection.setRequestProperty("User-Agent","NetFox"); g~i%*u,Y< FnFJw;:,{ Z* Fxr;)d int responseCode=httpConnection.getResponseCode(); o2C{V1nB if(responseCode>=400) sAG#M\A6 { )Kw
Gb&l& processErrorCode(responseCode); LyB &u() return -2; //-2 represent access is error ^t{2k[@ } .0b$mSV[ KDODUohC d?uN6JH9 String sHeader; 2MapB* n%J{Tcn6 !b0ANIp for(int i=1;;i++) U)n+j}vi { 1>BY:xZr //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); ^mA ^7jB //Utility.log(in.readLine()); np#RBy sHeader=httpConnection.getHeaderFieldKey(i); C;C= g1I} if(sHeader!=null) TZ2-%k# { muc>4!Q if(sHeader.equals("Content-Length"))
Pq@%MF]5 { ~RRp5x _ nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); ca}, tov& break; Xj^Hy"HC^~ } '8$*gIQ8 } Y%B:IeF} else W".: 1ov#B break; bvK fxAih } d 18>0R } };z[x2l^ catch(IOException e){e.printStackTrace ();} b;X|[tB catch(Exception e){e.printStackTrace ();} o'8`>rb TNHkHR[& #:yh2y7a% Utility.log(nFileLength); X?'v FC wInJ!1 ,a&&y0, return nFileLength; ,'E+f% } #H;yXsR` m1mA:R\zM #BK3CD(& //保存下载信息(文件指针位置) 7vRFF@eq} private void write_nPos() t3dvHU&Z: { ve [*t ` try{ g=T
!fF= output = new DataOutputStream(new FileOutputStream(tmpFile)); <]jKpJ{3N output.writeInt(nStartPos.length); #@*;Y(9Ol for(int i=0;i<nStartPos.length;i++)
9z9EK'g { w[bhm$SX]B // output.writeLong(nPos);
c%N8|!e output.writeLong(fileSplitterFetch.nStartPos); P}AfXgr output.writeLong(fileSplitterFetch.nEndPos); QR+{Yp } {g%F 3- output.close(); Dp5hr 8bT } _qZ?|;o^ catch(IOException e){e.printStackTrace ();} HFr#Ql>g catch(Exception e){e.printStackTrace ();} -/k;VT| } ]~!jf h]6"~ m iL%Q@!ka //读取保存的下载信息(文件指针位置) +EtL+Y(U private void read_nPos() 0gs0[@ { u0)~Im,X try{ zO)>(E? DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); YL$#6d int nCount = input.readInt(); 2Op\`Ht& nStartPos = new long[nCount]; wcdD i[E>i nEndPos = new long[nCount]; sC/5N for(int i=0;i<nStartPos.length;i++) 1h"CjOp,7 { u9.x31^ nStartPos = input.readLong(); :2qUel\PEC nEndPos = input.readLong(); Zi0B$3iOb } :KJG3j?
input.close(); B_^ ~5_0: } %(c5T)B9 catch(IOException e){e.printStackTrace ();} ~(BvIzzD catch(Exception e){e.printStackTrace ();} ]7*Z'E } !yo/ F&6 L7_qs+ 1qR[&=/ private void processErrorCode(int nErrorCode) dFu<h {
~s
:Ml System.err.println("Error Code : " + nErrorCode); ~F</s. } 'pJ46"D@m L=7U#Q/DE VI}.MnCa //停止文件下载 X"S-f;b# public void siteStop() jK[~dY { %|6t\[gn bStop = true; &I&:
for(int i=0;i<nStartPos.length;i++) IsaL+elq| fileSplitterFetch.splitterStop(); 5BL4VGwJ *bl*R'; $*%ipD}f } @Gh?|d7bD } b
V)mO@N~w //负责部分文件的抓取 xHA6 **FileSplitterFetch.java b"au9:F4@7 */ w4: package NetFox; HG1)q\Xd -|?I'~[#( 4oY<O import java.io.*; .=j]PckJO import java.net.*; y%y F34 7rc6 4QK~qAi public class FileSplitterFetch extends Thread { w3l+BUn:X P4M*vZq) FD}hw9VyF@ String sURL; //File URL D[m+=- long nStartPos; //File Snippet Start Position P,$|.pd' long nEndPos; //File Snippet End Position A]z~Dw3
int nThreadID; //Thread's ID {Hv/|.),hu boolean bDownOver = false; //Downing is over Px!M^
T!Pi boolean bStop = false; //Stop identical D!K){E FileAccessI fileAccessI = null; //File Access interface ST#OO! (XQBBt q'07 public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException )zFPf]gz { :YZqrcr} this.sURL = sURL; j^t#>tZS this.nStartPos = nStart; Mw0Kg9M this.nEndPos = nEnd;
z,6X{= nThreadID = id; x=UwyZ fileAccessI = new FileAccessI(sName,nStartPos);//定位 uafSz@` } X=:|v<E
xKilTh_.6 ?!N@%R>5rN public void run() M^i^_}~S; { ;1S~'B&1Q while(nStartPos < nEndPos && !bStop) 52*9q! { EJd l%j ` ^rN"\ X1A~#w> try{ X+'z@xpj URL url = new URL(sURL); NTnjVU
} HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); Km5#$IiP; httpConnection.setRequestProperty("User-Agent","NetFox"); Js`xTH' String sProperty = "bytes="+nStartPos+"-"; *5SOXrvhu6 httpConnection.setRequestProperty("RANGE",sProperty); N36<EHq Utility.log(sProperty); S,K'y?6 `zr%+ iIOA5 4!o InputStream input = httpConnection.getInputStream(); Hs%;uyI@$ //logResponseHead(httpConnection); o%!8t_1mR :# 1d;jx DNARe!pK byte[] b = new byte[1024]; QAp+LSm int nRead; ?s4-2g while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) [n[!RddY { 9?VyF'r= nStartPos += fileAccessI.write(b,0,nRead); 3GH@|id //if(nThreadID == 1) wVI 1sR // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); =hs
!t|(* } mSn> `Qf$]Eoft "bO\Wt#Mf Utility.log("Thread " + nThreadID + " is over!"); y^7ol;t bDownOver = true; {Vc%g a|E //nPos = fileAccessI.write (b,0,nRead); dQ4VpR9|; } uF xrv catch(Exception e){e.printStackTrace ();}
:Hk:Goo2 } /H_,1Fu| } ~16QdwK 0K\Xxo.= TM|M#hMS //打印回应的头信息 6$1dd# public void logResponseHead(HttpURLConnection con)
ohK_~ { >^cP]gGY for(int i=1;;i++) 'baew8Q# { \q2#ef@2 String header=con.getHeaderFieldKey(i); CNC3">Dk~9 if(header!=null) {-(}p+;z //responseHeaders.put(header,httpConnection.getHeaderField(header)); +*dG'U6 Utility.log(header+" : "+con.getHeaderField(header)); MXSN
< else }gk37_}X\I break; 3Un{Q~6h } d$>TC(E=t } YCJ6an ^DL}J>F9G }GIwYh/ public void splitterStop() UL81x72O { JArSJ:} bStop = true; OnNWci|7 } #~A (%a KeU|E<|! k z|2PP } 8p4J7 - tb^8jC Nm{\?
/* . ZuRH_pI **FileAccess.java r(ej=aR *//文件访问(定位,写) )E--E+j package NetFox; )ZxDfRjL import java.io.*; Xb0$BAP 72hN%l \)\uAI- public class FileAccessI implements Serializable{ p2]@yE7w fj2pD Cic //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 /}G+PUk7 RandomAccessFile oSavedFile; kA`Z#yu long nPos; /.Yf&2X\ V$y6=Q<c z/IA
@ public FileAccessI() throws IOException #fq%903=
{ ?hpT"N,hF9 this("",0); \#LkzN8 } cL31g_u -__RFxG 9`83cL public FileAccessI(String sName,long nPos) throws IOException F`/-Q>Q { _lWC)bv` oSavedFile = new RandomAccessFile(sName,"rw"); [E9V#J89 this.nPos = nPos; v'R{lXE oSavedFile.seek(nPos); m5!~PG:_
} P}So>P~2 81m3j`b \rXmWzl{ public synchronized int write(byte[] b,int nStart,int nLen) gN2$;hb? { @J`o
pR int n = -1; (IlHg^" try{ .YV{w L@cB oSavedFile.write(b,nStart,nLen); *&WkorByW n = nLen; #BB,6E
} )gOVnA/M catch(IOException e) lSMv9:N { bve_*7CEM e.printStackTrace (); 4*k>M+o/C4 } RMinZ}/ s)Gnj; )7$1Da|. return n; p`/"e<TP } !n;0%"(FH
HaJs)j 9Fo00"q } L1'PQV {1 VHz])I T1$fu(f /* BZS%p **SiteInfoBean.java |l4tR */ K|i:tHF]@ package NetFox; V=$pXpro% 9CBKU4JQ hv)>HU& public class SiteInfoBean { w}8
,ICL tcDWx:Q t0*kL. private String sSiteURL; //Site's URL
fQW1&lFT private String sFilePath; //Saved File's Path 0P{^aSxTP private String sFileName; //Saved File's Name U2v;[ >=] private int nSplitter; //Count of Splited Downloading File [HRry2#s \a<7DTV e"Y ( 7< public SiteInfoBean() :;Lt~:0b~ {//nSplitter的缺省值为5 2C6o?*RjyY //default value of nSplitter is 5 mLEJt,X this("","","",5); v'Y0|9c } &a;{ed1B !,Ou:E?Bb ~]sj.>P public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) nt 9LBea { zd%n)jlwR sSiteURL= sURL; :B^YK]. sFilePath = sPath; f ZEyXb sFileName = sName; A-n@:` n~ this.nSplitter = nSpiltter; Mi>! +3>)r{#k u+5&^"72, } ?;GbK2\bj YC!IIE_ .<m${yU{3 public String getSSiteURL() _GhP{C$ { |IcA8[ return sSiteURL; 0oNNEC } L3/SIoqd 6TR` O v3p0 public void setSSiteURL(String value) *F<Ar\f5 { (Q]Ww_r~ sSiteURL = value; |wxAdPe } Abw=x4d(i V4#b W G '1K6 public String getSFilePath() 3_DwqZ 'O { -dto46X return sFilePath; ;JuBybJb } #QUQC2P(~ #&k`-@b5| e/7rr~"| public void setSFilePath(String value) ;\'d9C { 7@W}>gnf sFilePath = value; Io;x~i09K } `4SwdW n D'8xP %P MyZ5~jnr\ public String getSFileName() <r>1W~bp.q { \CU-a`n return sFileName;
rSg OQ } N*1{yl76x T1-.+&< \ u*R6z public void setSFileName(String value) [ML|,kq! { ;aj4V<@ sFileName = value; 3>T2k } } A"3"f8P8a 3(oB[9]s [PIh^DhK public int getNSplitter() 5cF7w { QmKEl|/{u return nSplitter; 5!s7`w]8*0 } Al
MMN"j _:1s7EC h@2YQgw` public void setNSplitter(int nCount) g`Kh&|GU { 1 u~Xk? nSplitter = nCount; [mcER4]} } ;RW0Dn)Q } I^GZ9@UE qNuBK6E#4 r`\6+ Ntb. /* Op_(10| **Utility.java 3/{,}F$ */ j5:/Gl8 package NetFox;
N Zu2D Z~3 Q{o ]^tN public class Utility { ?mp}_x#= :|HCUZ*H(T ==Ah& ){4^ public Utility() t"$#KP< { ysH'X95 Z#t}yC%^d o.g)[$M8cF } 01<Ti" a 7>^^?| //线程睡眠 Wx` $hvdq public static void sleep(int nSecond) Ln$= 8x^T { grxlGS~Q try{ sTu]C +A Thread.sleep(nSecond); -NPX;e$< } ="('
#o catch(Exception e) GK`U<.[c { Z [YSET e.printStackTrace (); MP|$+yuR~ } s?Z{LWZ@ } p_B5fm7#6W XY,!vLjL //日志 M^&^g public static void log(String sMsg) 2{xf{)hO? { sh/4ui{ System.err.println(sMsg); !BjJ5m } v;nnr0; U?xa^QVhj =/+f3 public static void log(int sMsg) 8dLK5"_3 { Ez+8B|0P System.err.println(sMsg); NydF'N_1 } no,b_0@N } a_\t(U O?f?{Jsx u\3=m%1 /* -`CE; **TestMethod.java A~@x8 */ pG^>y0 package NetFox; uC|bC#; %$&_! ew&"n2r public class TestMethod { cS%;JV>C
a] P0PH~ \gGTkH public TestMethod() T2}X~A { ///xx/weblogic60b2_win.exe =<X4LO)C try{ XC!Y {lp SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); f_z]kA
+H //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); ]Jnrs SiteFileFetch fileFetch = new SiteFileFetch(bean); E/hO0Ox6 fileFetch.start(); Y^QG\6q } 3~\,VO'' catch(Exception e){e.printStackTrace ();} H}cq|hodn .|i/
a%J ig ^x%!; } ! JauMR UmL Boy&* eWr2UXv$ public static void main(String[] args) :j`4nXm { X`A+/{ H new TestMethod(); 7;a } ^g=j`f[T } 6eQa@[.Q 点击下载更多相关资料
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