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/* z1{kZk **SiteFileFetch.java *VG#SK */ .Ks%ar package NetFox; `A_CLVE import java.io.*; p8aGM-+40W import java.net.*; <%Zg;]2H` -W38#_y/\ omevF>b; public class SiteFileFetch extends Thread { MqDz cB] '_N~PoV .B_LQ;0:
SiteInfoBean siteInfoBean = null; //文件信息Bean jdqVS @SD long[] nStartPos; //开始位置 JR] /\( long[] nEndPos; //结束位置 l 8qCg/ew FileSplitterFetch[] fileSplitterFetch; //子线程对象 5|z>_f.^pS long nFileLength; //文件长度 [H<![Z1*r boolean bFirst = true; //是否第一次取文件 gi\2bzWkbX boolean bStop = false; //停止标志 S~X&^JvT File tmpFile; //文件下载的临时信息 ~)xg7\k DataOutputStream output; //输出到文件的输出流 M=:!d$c
,@!io //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) {]BPSj{B public SiteFileFetch(SiteInfoBean bean) throws IOException ek\8u`GC { +i HZ* siteInfoBean = bean; z~f Zg6 //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); 4
;ybQ tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); AqnDsr! if(tmpFile.exists ()) b&BkT%aA(G { ?y_W%ogW bFirst = false; W}{RJWr read_nPos(); JcV'O)& } 5tfD*j n else s\O4D*8 { -!V+>.Oh nStartPos = new long[bean.getNSplitter()]; Hz~?"ts@; nEndPos = new long[bean.getNSplitter()]; :59fb"^$ } 6Y9F U O=m_P}K m.!n|_}] @{/GdB,} } s2F<H# cBcfGNTJ~ 9n9Z public void run() l ld,&N8 { +5~5BZP //获得文件长度 J,q6 //分割文件 Uao8#<CkvJ //实例FileSplitterFetch 0i/!by{@ //启动FileSplitterFetch线程 ),cozN=NM //等待子线程返回 @ByD= try{ RBuerap if(bFirst) ]+4QsoFNt { )c*NS7D~f nFileLength = getFileSize(); 0APh=Alq if(nFileLength == -1) ^i+ d 3 { _C"=Hy{ System.err.println("File Length is not known!"); C.]\ 4e } 4gD;X NrV else if(nFileLength == -2) :DWvH,{+& { |z.x M> System.err.println("File is not access!"); b-!+Q) } _UP=zW else c+S<U* { J)o.@+Q} for(int i=0;i<nStartPos.length;i++) 2-G6I92d { ?OjZb'+=K nStartPos = (long)(i*(nFileLength/nStartPos.length)); skaPC#u } k|uW~I) for(int i=0;i<nEndPos.length-1;i++) 80m<OW1 { ;[nomxu|? nEndPos = nStartPos[i+1]; xD.Uh}:J } X 8/9x-E_ nEndPos[nEndPos.length-1] = nFileLength; 2><=U7~ } /6fa
7; } X%X`o%AqC =:fN U~3uu&/r //启动子线程 1PGY/c
fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; Q'
b@5o for(int i=0;i<nStartPos.length;i++) 9!XXuMWU< { 4e`GMtp fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), V8KdY=[ siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), xgp 6lO [ nStartPos,nEndPos,i); etw.l~y Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); &[yW}uV<7 fileSplitterFetch.start(); 7=3'PfS } |-)2 D=P // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), v79k{<Ln siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); S[zETRSG // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", mv,p*0 nEndPos = " + nFileLength); n3z]&J5fr // fileSplitterFetch[nPos.length-1].start(); Z-U-n/6I wn1` 9 qX9x#92 //等待子线程结束 L.ML0H- //int count = 0; ^WF/gup\hS //是否结束while循环 Q$bi:EyJXc boolean breakWhile = false; 1`& Yg( JX)%iJq# wjzR 8g0bQ while(!bStop) Qr.SPNUFK { n=F|bW write_nPos(); OK] _.v} Utility.sleep(500); rbt/b0ET breakWhile = true; DYf3>xh>xb (J6>]MZ#) /}\Uw for(int i=0;i<nStartPos.length;i++) y1qJ { faIHmU if(!fileSplitterFetch.bDownOver) / biB*Z { N+N98~Y`P breakWhile = false; Dve+ #H6N break; "L9yG: } #@UzOQ> } aam6R/4 if(breakWhile) S"<"e\\}"_ break; ?9Hs,J 1 !8
b9 X~2L //count++; b#
| //if(count>4) xg.o7-^M // siteStop(); eAl;:0=%L } rYI7V? K@<%Vc>L( Z#vU~1W System.err.println("文件下载结束!"); 7Zw.mM!i } 2kfX_RK catch(Exception e){e.printStackTrace ();} )` z{T } ,9.-A-Yw }7HR<%<7 qdNt2SO //获得文件长度 ISDeLUihY public long getFileSize() +1pY^#A { 5H^" int nFileLength = -1; ExxD
w_VGT try{ 0!tw)HR% URL url = new URL(siteInfoBean.getSSiteURL()); ~Gj%z+< HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); !;, Dlq-} httpConnection.setRequestProperty("User-Agent","NetFox"); M5Q7izM d:!A`sk7 oMeIXb)z int responseCode=httpConnection.getResponseCode(); Oz1S*<]=,~ if(responseCode>=400) b haYbiX? { U6xs'0 processErrorCode(responseCode); ;&} rO.0 return -2; //-2 represent access is error D.ERt)l> } cii!
WCu 5fvY#6; X3zpU7`Av+ String sHeader; 0`Hr(J`F T$IwrTF@? lF#p1H>\ for(int i=1;;i++) W[SZZV_(tu {
#V-0-n,` //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); B,(zp#&yB //Utility.log(in.readLine()); S{fFpe- sHeader=httpConnection.getHeaderFieldKey(i); 9g~"Y[ ] if(sHeader!=null) 0[In5I I { 61pJVOe if(sHeader.equals("Content-Length")) _Squ%z:D { b-OniMq~ nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); GX#SCZ&}C break; y!u=]BE
} *LOUf7` } 1+ib(MJ<:# else Ftw;T| break;
3PUyua' } c]PG5f xf } TfnBPO catch(IOException e){e.printStackTrace ();} %f1>cO9[ catch(Exception e){e.printStackTrace ();} .H#<yPty UAEu.AT UlQS]f~ Utility.log(nFileLength); tDQuimYu7 ]9PQKC2& Me2qOc^Z- return nFileLength; VdOcKP. } ; S~ oY<R[NYKu '`sZo1x%f //保存下载信息(文件指针位置) <HB@j}qi private void write_nPos() k1E(SXcW9 { kK~,?l try{ ;hb_jW-0W output = new DataOutputStream(new FileOutputStream(tmpFile)); PHR:BiMZ output.writeInt(nStartPos.length); V.|#2gC]t for(int i=0;i<nStartPos.length;i++) _ K Ix7 { T*{nf // output.writeLong(nPos); A+41JMH output.writeLong(fileSplitterFetch.nStartPos); c-oIP~, output.writeLong(fileSplitterFetch.nEndPos); bmQ-5SE } ~-2Gx
HO` output.close(); 9$*O ^ } bw8[L;~%_ catch(IOException e){e.printStackTrace ();} d:8c}t2X catch(Exception e){e.printStackTrace ();} ^_c6Op<F } #p7K2 ]$&N"&q `M[o.t //读取保存的下载信息(文件指针位置) 6-Id{m x private void read_nPos() rsn^YC { LTw.w:"J try{ "I,=L;p DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); Xrr3KQaK& int nCount = input.readInt(); f!Mx +ky nStartPos = new long[nCount]; o2rL&
nEndPos = new long[nCount]; S!8gy,7<J for(int i=0;i<nStartPos.length;i++) G$A=T u~ { 0sfb$3y nStartPos = input.readLong(); zVvL! nEndPos = input.readLong(); *ry}T= } -gB9476- input.close(); :r4o:@N' } -]Y@_T.C catch(IOException e){e.printStackTrace ();} 2(AuhZ> catch(Exception e){e.printStackTrace ();} 6wq>&P5 } W9!K~g_ {RC&Ub> VRB!u420 private void processErrorCode(int nErrorCode) K_ Od u^ { v3b+Ddp System.err.println("Error Code : " + nErrorCode); e!=~f%c<N } <j}A=SDZ) He*c=^8k ]Ns)fr6 //停止文件下载 xG WA5[YV public void siteStop() YL&)@h { Q!y%N& bStop = true; `8/D$ for(int i=0;i<nStartPos.length;i++) &4{!5r fileSplitterFetch.splitterStop(); ~@$RX:p Sjp ]TWj \b*z<Odv } "A]#KTP } yJ4ZB/ZQ //负责部分文件的抓取 L*FQ`:lZ **FileSplitterFetch.java y.$Ae1a= */ 8/k"A-m package NetFox; gC+?5_=< C7FxV2 6aKfcvf & import java.io.*; nc^DFP import java.net.*; fS$;~@p :i>If:>g HCw,bRxm public class FileSplitterFetch extends Thread { h+ <Jv ckYT69U L+8{%\UPd String sURL; //File URL *WfQi8 long nStartPos; //File Snippet Start Position CE @[Z long nEndPos; //File Snippet End Position MdDL?ev int nThreadID; //Thread's ID 5?q6g boolean bDownOver = false; //Downing is over Y94S!TbB boolean bStop = false; //Stop identical #z+?t FileAccessI fileAccessI = null; //File Access interface {zalfw{+
;;|.qgxc~ 4L_)@n} public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException zbI|3 { )4TP{tp this.sURL = sURL; E[cH/Rm this.nStartPos = nStart; *yv@B!r this.nEndPos = nEnd; F:og :[ nThreadID = id; 01~
nC@; fileAccessI = new FileAccessI(sName,nStartPos);//定位 F+ %l=
fs } ERy=lP~gV <HnpI tl;b~k public void run() 20# V?hX3 { erhez while(nStartPos < nEndPos && !bStop) @`qB[<t8:< { d ehK#8 ,KCxNdg^#- 6Ey@)p..E try{ ;!A=YXB URL url = new URL(sURL); Y5c[9\'\ HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); Y/sZPG}4 httpConnection.setRequestProperty("User-Agent","NetFox"); 03c8VKp'p String sProperty = "bytes="+nStartPos+"-";
~owodc httpConnection.setRequestProperty("RANGE",sProperty); K#Zv>x!to Utility.log(sProperty); iK=QP+^VN qOy0QZ#0 J0Gjo9L InputStream input = httpConnection.getInputStream(); \ CX6~ //logResponseHead(httpConnection); 2u$rloc$b _F5*\tQ ( k,?) byte[] b = new byte[1024]; 0xY</S int nRead; p zZ+!d while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) 9Dbbk/j| { }3_> nStartPos += fileAccessI.write(b,0,nRead); _+X-D9j(l //if(nThreadID == 1) _u]%K-_ // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); CeeAw_*@ } n(`|:h" "n_X4e+18P "8R
&c} Utility.log("Thread " + nThreadID + " is over!"); c]n"1YNm bDownOver = true; fW[ .Q0 //nPos = fileAccessI.write (b,0,nRead); 4xH/a1&p= } FA+"t^q catch(Exception e){e.printStackTrace ();} rsq?4+\ } ac\( [F- } Gt+rVJ=v 53 -Owjpx ^qzH(~g{M //打印回应的头信息 Au6Y] public void logResponseHead(HttpURLConnection con) )N*Jc @Y@ { =t`cHs29 for(int i=1;;i++) }*C*!?pcd { 3I(;c ,S String header=con.getHeaderFieldKey(i); K:^0*5Y-k if(header!=null) `2hg?(ul //responseHeaders.put(header,httpConnection.getHeaderField(header)); w {"1V7| Utility.log(header+" : "+con.getHeaderField(header)); jwUX?`6jX else I _gE`N break; R1*4 } Z/dhp0k } 4Us_Z{. ]x{.qTtw r?IBmatK/ public void splitterStop() 0zE@?. { k(M:#oA! bStop = true; QZtQogNy# } x
FWhr#5, >lfuo lj UdsU w } l&}}Io$?@
NSBcYObX RWGf]V]6 /* TDUY& 1[ **FileAccess.java #q h
, *//文件访问(定位,写) \H~zN]3^
package NetFox; vP=68muD import java.io.*; O =;jDWE 6T4I,XrY_F |JP19KFx'B public class FileAccessI implements Serializable{ *yaS^k\ :W5W
@8Y //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 _CfJ Kp) RandomAccessFile oSavedFile; dFF=-_O> long nPos; ,2^4"gIl &w#! c!_c, vwrn public FileAccessI() throws IOException
?C#E_ { ~MBPN4r this("",0); \+l*ZNYM3 } Yj#tF}nPC NcP/W>lN tAF?.\x"g public FileAccessI(String sName,long nPos) throws IOException '3Lu_]I- { OQ7 `n<I<) oSavedFile = new RandomAccessFile(sName,"rw"); m3TR}=n this.nPos = nPos; -^5467 oSavedFile.seek(nPos); K)BQ0v.:[ } 0/b
_T h%krA<G9 o6d x\ public synchronized int write(byte[] b,int nStart,int nLen) t*=[RS* { ATl?./T u int n = -1; _$ivN!k try{ xH xTL>,? oSavedFile.write(b,nStart,nLen); ~Ix2O n = nLen; 'gvR?[!t } X!p`|i catch(IOException e) G$>QH-p { XTo7fbW* e.printStackTrace (); ;Mup@)!j } -cM1]soT ^J5{quV IQRuqp KL return n; v6s,lC5qR } B*,)@h 0Gc@AG{ 2S{P(B } K5jt(7i PDuc;RG \xj;{xc /* +yp:douERi **SiteInfoBean.java :-B+W9'5 */ P"8Ix package NetFox; \3$!) z u3C_Xz MQQm3VaKS public class SiteInfoBean { Lr:Qc#2 ch8a z*EV>Y[ private String sSiteURL; //Site's URL ~w+I2oS$ private String sFilePath; //Saved File's Path gvA}s/ private String sFileName; //Saved File's Name (4T0U5jgT private int nSplitter; //Count of Splited Downloading File y|2<Vc G}fBd @kWL "yy, public SiteInfoBean() +e-F`k {//nSplitter的缺省值为5 x#J9GP. //default value of nSplitter is 5 OT%E|) 6' this("","","",5); 94rSB}b.O } j#1G?MF lh8QtPe P.'.KZJ:WD public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) u^~7[OkE { 3m1(l?fp sSiteURL= sURL; vR!+ 8sy$ sFilePath = sPath; JaCX}[R sFileName = sName; m&:&z7^p this.nSplitter = nSpiltter; zj1~[$
( tWIs
|n 9 {&g.+ } 0O9b
7F C#kE{Qw10r ^#HaH public String getSSiteURL() #ES[),+|mB { H<(F$7Q!\ return sSiteURL; p~ b4TRvA6 } %S`&R5 \c<
oVF' fF(2bVKP: public void setSSiteURL(String value) ;
oyV8P$ { |ia5Mr"t sSiteURL = value; eV[{c %wN: } ;6W ]f([ &h-_|N VJ~D.ec public String getSFilePath() wJy]Vyd { C !j3@EZ$ return sFilePath; "do5@$p| } 3iCe5VF S,c{LTL rwRZGd *p public void setSFilePath(String value) CS7b3p!I { u>*a@3$f sFilePath = value; V eGSr } r#sg5aS7O| ~#r>@C aZN?V}^+ public String getSFileName() k=]e7~! { 79T_9}M return sFileName; Uwc%'=@ } X:GRjoa &C9IR,& EYT^*1,E* public void setSFileName(String value) j&8YE7 { e~]P _53 sFileName = value; sL$sj|" S } p&(0e,`z/ -9b=-K.y \p4*Q}t public int getNSplitter() cNWmaCLN$ { $*C
}iJsF return nSplitter; w2s`9 } WLUgiW(0$ U%h.l oGcgd$%ZB public void setNSplitter(int nCount) JtFq/&{i { Y&6jFT_ nSplitter = nCount; `% 9Y)a/e } |! 9~ } w
<r*& +(+lbCW/ xV>
.] /* Xf4Q Lw/r **Utility.java /!]K+6>u */ *~PB package NetFox; mdc?~?? 8 A;co1,]gR -H60T,o
public class Utility { G*=HjLmZg !VD$uT
b] 5dBZ( public Utility() {"p ~M7 { lQIg0G/3 mB`HPT r Ea(1(I } Ku[q#_7 RuHDAJ"&a //线程睡眠 zA#pgX[# public static void sleep(int nSecond) b 8@}Jv { i+`8$uz try{ ,a5q62)q Thread.sleep(nSecond); 4Wl`hF } ozOc6 catch(Exception e) so` \e^d { Xe4 e.printStackTrace (); qsj$u-xhX } L` [iI } z>!./z]p s)\PY //日志 4-bM90&1t public static void log(String sMsg) RPX.?;": { \#[DZOI~ System.err.println(sMsg); [vr"FLM|9 }
]!ZZRe ! Vl)aL
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public static void log(int sMsg) (6fD5XtS { -c>3|bo System.err.println(sMsg); ndQw> } BsA4/Bf } Bl>m`/\1i ;1~ n|IY nKE^km /* 5%TSUU+<I **TestMethod.java N1Y
uLG: */ @.L#u#
package NetFox; ^C
K!=oO |21VOPBS X}GX6qAdt public class TestMethod { rw)!>j+&A Eq_@xT0> 2 4od74\ public TestMethod() IfH/~EtX { ///xx/weblogic60b2_win.exe $bhI2%_`M try{ 'z91aNG] SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); p4uzw //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); U>n[R/~] SiteFileFetch fileFetch = new SiteFileFetch(bean); V'b4wO1RV fileFetch.start(); ^4IJL", } I!!cA?W catch(Exception e){e.printStackTrace ();} ;Qt%>Uo8 @CM5e! 0s8fF"$ } :H>I`)bw I*3>>VN [#!Y7Ede public static void main(String[] args) q>+!Ete1p { NP3
e^ new TestMethod(); HMD\)vMK6 } E!X>C^ } ,./n@.na 点击下载更多相关资料
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