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/* %_i0go,^ **SiteFileFetch.java ;4O;74`Zh */ R&-W_v+ package NetFox; Eb{4.17b import java.io.*; LcQ\?]w`] import java.net.*; {?h6*>-^Z `6l24_eKf ^5zS2nm public class SiteFileFetch extends Thread { TF([yZO' H'0J1\ h (cqA^.Td SiteInfoBean siteInfoBean = null; //文件信息Bean RIVN>G[;L long[] nStartPos; //开始位置 \:f}X?: long[] nEndPos; //结束位置 5]2!Bb6> FileSplitterFetch[] fileSplitterFetch; //子线程对象 n(F< long nFileLength; //文件长度 |'l* $ boolean bFirst = true; //是否第一次取文件 *FG4!~<e boolean bStop = false; //停止标志 [/2@=Uh- File tmpFile; //文件下载的临时信息 {&JurZ DataOutputStream output; //输出到文件的输出流 }O-%kl fxf
GJNR //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) HDfQ9__ public SiteFileFetch(SiteInfoBean bean) throws IOException "> 4[+' { kH(3 siteInfoBean = bean; 94>7-d //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); ^Qb!k/$3y tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); *rMN,B@ if(tmpFile.exists ()) <?`e9o { qo&SJDG bFirst = false; h19.b:JT read_nPos(); ",,qFM! } B#/~U`t* else &hM,b!R| { xBx?>nN nStartPos = new long[bean.getNSplitter()]; f"}14V nEndPos = new long[bean.getNSplitter()]; d' eM(4R@ } ,:Y=,[ n >Gu>T\jpe. d ;Gm {g# !z&seG]@ } \2VZkVO9 eVbh$cIrZ :-jP8X public void run() mm9S#Ya { cB{;Nh6" //获得文件长度 o@V/37! //分割文件 B2+_F"<; //实例FileSplitterFetch q~A|R //启动FileSplitterFetch线程 uS+b* : //等待子线程返回 fqp7a1qQl try{ FK,r<+h if(bFirst) 0BU:(o& { h"%,eW|^ nFileLength = getFileSize(); (G b{ckzs if(nFileLength == -1) XajY'+DIsz { Jv$2wH System.err.println("File Length is not known!"); Sv]"Y/N } Z(clw else if(nFileLength == -2) N`mC_) { =P+wp{?AN| System.err.println("File is not access!"); cH8H)55F } 0eu$oel- else V:$1o { -wHGi for(int i=0;i<nStartPos.length;i++) t"@|;uPAu { uZ{xt6 f nStartPos = (long)(i*(nFileLength/nStartPos.length)); @RG3*3( } 9~ .BH;ku for(int i=0;i<nEndPos.length-1;i++) Ra,on&OP`* { O8}s*} ] nEndPos = nStartPos[i+1]; U";Rp&\3; } Z-r0
D nEndPos[nEndPos.length-1] = nFileLength; gZuR4Ti } N
pIlQaMo4 } Fu=VY{U4 i3\oy`GJ G}OrpPP //启动子线程 6/[h24d fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; mgl'
d for(int i=0;i<nStartPos.length;i++) 'k) P(H { 6Yi,%# fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), ZkG##Jp\> siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), 4w nStartPos,nEndPos,i); SodW5v a Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); Wh&Z *J fileSplitterFetch.start(); cN(QTbyl6Q } )9P // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(),
TOP'Bmb siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); m*WEge*$t // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", p{_O*bo
nEndPos = " + nFileLength); &5CeRx7% // fileSplitterFetch[nPos.length-1].start(); ]$X=~>w .
*+7xL pc(9(. | //等待子线程结束 FP
cvkXQD //int count = 0; hYQ%|CBXBR //是否结束while循环 ).6/ii9gt boolean breakWhile = false; l@2`f#y1~< lJp v 7VD7di=D while(!bStop) WxI]Fcb< { IQ`aDo-V write_nPos(); m<;" 1<k Utility.sleep(500); o`]FH_ breakWhile = true; +Gs;3jC^ m^&mCo, *^m.V= for(int i=0;i<nStartPos.length;i++) Gf$>!zXr { ojI"<Q~g if(!fileSplitterFetch.bDownOver) Y{B_OoTun { 8TM=AV breakWhile = false; K*D]\/; ^ break; Y2~{q Y } 'r3}= z4Y } H$'kWU*l if(breakWhile) Y\2>y"8>$x break; =<tEc+!T3 `o- <, >~r@*gml //count++; !,WRXE&j //if(count>4) n_gB#L$ // siteStop(); gI$`d?[0{ } z?g4^0e ^E,UcK; "s^@PzQpN System.err.println("文件下载结束!"); ;^SgV } 3W00,f^9 catch(Exception e){e.printStackTrace ();} KV(W|~+ rM } LA3,e (e T"lqPbK
MO+0]uh: //获得文件长度 Ft>8 YYyU public long getFileSize() l"g%vS,;` { ;qQzF int nFileLength = -1; D-EM try{ f)fw87UPc URL url = new URL(siteInfoBean.getSSiteURL()); alD|-{Bf HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); >}tG^ )os httpConnection.setRequestProperty("User-Agent","NetFox"); m$j;FKz+| ImW~Jy UeTp, int responseCode=httpConnection.getResponseCode(); rx)Q] if(responseCode>=400) -B! TA0=oJ { k18V4ATE] processErrorCode(responseCode); vK/Z9wR*05 return -2; //-2 represent access is error WWzns[$f } oMf h|B l$@lk?dc 1a4 $.
{ String sHeader; !0_Y@>2 q&x#S_! "lAS
<dq for(int i=1;;i++) FV,SA3 { mjc:0hH //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); 09i[2n;O //Utility.log(in.readLine()); 7guxkN# sHeader=httpConnection.getHeaderFieldKey(i); Unk+@$E& if(sHeader!=null) &?pAt30K: { %^A++Z$` if(sHeader.equals("Content-Length")) qa#F}aGd { ^DJU99
nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); T!$HVHh&,} break; 2?&ptN)`N } `84yGXLK } x$4'a~E else XAkl,Y break; 3mpjSL } _3JTHf<+ } CKx}.<_ catch(IOException e){e.printStackTrace ();} 6d6SP)|j catch(Exception e){e.printStackTrace ();} zh#uwT1u )]Rr:i9n I<f M8t.Y> Utility.log(nFileLength); &KwtvUN{ XS@6jbLE Q4 S8NqE return nFileLength; +[qy HTcG } #{PNdINoU SJe;T Nzt1JHRS //保存下载信息(文件指针位置) SesO$=y private void write_nPos() J>&GP#7} { w Nnb@ try{ s)=7tHoqB) output = new DataOutputStream(new FileOutputStream(tmpFile)); ^4i3 #} output.writeInt(nStartPos.length);
WR%iUO40 for(int i=0;i<nStartPos.length;i++) OC.@C}u { M1\/ueOe // output.writeLong(nPos); cQb%bmBc5 output.writeLong(fileSplitterFetch.nStartPos); h<q``hn> output.writeLong(fileSplitterFetch.nEndPos); T!r7RS } T9yW# . output.close(); F*u;'K }
c7 -j catch(IOException e){e.printStackTrace ();} |&.)_+w catch(Exception e){e.printStackTrace ();} 4T-AWk } oyY,uB.| cgAcAcmY }P#gXG //读取保存的下载信息(文件指针位置) GW#Wy=(_ private void read_nPos() L x&ZWF$ { XFYl[?`G try{ X8TZePh DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); [)?3Dp|MH int nCount = input.readInt(); G@2M&0' nStartPos = new long[nCount]; 1:8: yFV nEndPos = new long[nCount]; 9IMcp~zX for(int i=0;i<nStartPos.length;i++) e)8iPu .. { bv0 %{u& nStartPos = input.readLong(); I
Cs1= nEndPos = input.readLong(); vhW'2<( } ?*0kQo' input.close(); 7y3; F7V } *!kg@ _0K catch(IOException e){e.printStackTrace ();} =T`-h"E~@ catch(Exception e){e.printStackTrace ();} *bK@ A2` } ,#6\:i /zM7G?y <R$|J| private void processErrorCode(int nErrorCode) >F
v8 - { AseY.0 System.err.println("Error Code : " + nErrorCode); !ywc). ]e } #SmWF|/ |SmN.*&(9 U ;/ )V //停止文件下载 @AFLF X] public void siteStop() J^T66}r[f, { *W
l{2& bStop = true; Pa*yo:U'h for(int i=0;i<nStartPos.length;i++) `y(3:##p fileSplitterFetch.splitterStop(); n1|%xQBU@ kW9STN bYfcn]N } B(5g&+{Lq~ } h2nyP //负责部分文件的抓取 |qD<h **FileSplitterFetch.java s.U p<Rw */ o/xE
O=AW package NetFox; [F$3mzx 9UZX+@[F ()Z$j,2 import java.io.*; ]cD!~nJ import java.net.*; l)Hu.1~ ]z,?{S nHX@ public class FileSplitterFetch extends Thread { ,~!lN yL (~#9KA1A} FVHL;J]nf1 String sURL; //File URL )Z#7%,o long nStartPos; //File Snippet Start Position ,3K?=e2 long nEndPos; //File Snippet End Position AWzpk}\ int nThreadID; //Thread's ID :c>,=FUT boolean bDownOver = false; //Downing is over F&Gb[Q&a8 boolean bStop = false; //Stop identical /"U<0jot FileAccessI fileAccessI = null; //File Access interface q)/4i9
Tr8+E;; F=#Wfl-o public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException bF.Aj8ZQ { qr*/}F6 this.sURL = sURL; '#fj) this.nStartPos = nStart; AG?oA328 this.nEndPos = nEnd; 31}6dg8?n nThreadID = id; _Cxs"to fileAccessI = new FileAccessI(sName,nStartPos);//定位 anbr3L[! } ZO,]h9?4 0bor/FU-d -(jcsqDk public void run() $_y"P { #S"=)BZ8L while(nStartPos < nEndPos && !bStop) a?;{0I:Ln { PrCq
JY pd|s7 9Ah4N2nL-b try{ q#Bdq8 URL url = new URL(sURL); nm)F tX|A HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); CAX U
# httpConnection.setRequestProperty("User-Agent","NetFox"); ("{'],> String sProperty = "bytes="+nStartPos+"-"; *(rq AB0~ httpConnection.setRequestProperty("RANGE",sProperty); SF6n06UZu Utility.log(sProperty); @!S5FOXipZ |qBo*OcO ~9{.!7KPc InputStream input = httpConnection.getInputStream(); Vrnx#j-U //logResponseHead(httpConnection); (efH>oY[ TCVJ[LbJ 4x:fOhtP byte[] b = new byte[1024]; ?h{ & int nRead; ;RR)C@n1 while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) 8WAg{lVs { M*x_1h5n nStartPos += fileAccessI.write(b,0,nRead); 'F@'4[uda //if(nThreadID == 1) A9"ho}< // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); }}
IvZG& } Nz m
7E] mGIS[_dcs G B15 Utility.log("Thread " + nThreadID + " is over!"); $+tkBM bDownOver = true; TY?Fs- //nPos = fileAccessI.write (b,0,nRead); aJub(" } xHf
l>C' catch(Exception e){e.printStackTrace ();} noacnQ_I$ } YcIk{_N3 } /t816,i t({:TQ nF)|oA //打印回应的头信息 \=.iM?T public void logResponseHead(HttpURLConnection con) "2 Kh2[K { @Fo0uy\G for(int i=1;;i++) -G{}8GM { #{0c01JZ String header=con.getHeaderFieldKey(i); RJ0w3T]7 if(header!=null) wqw$6"~ //responseHeaders.put(header,httpConnection.getHeaderField(header)); lOVsp# Utility.log(header+" : "+con.getHeaderField(header)); (mv8_~F0 else Z
yIn>]{ break; lO:[^l?F } /Qbt } n84*[d}t #SO9e.yhI y0Ag px public void splitterStop() K(hqDif*6 { R#oXQaBJ bStop = true; 8NpQ"0X } :=-h'<D }v`5
BwbvZfV| } n]|[|Rf1 q
K]Wk+ NJ3b Oq /* (}'0K? **FileAccess.java {4
*ob@w* *//文件访问(定位,写) B&"fPi package NetFox; 6%:N^B=%} import java.io.*; =YI<L8@g~ _Nw-|N . euQd public class FileAccessI implements Serializable{ ] OR] A07FjT5w8 //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 U)N;=gr\ RandomAccessFile oSavedFile; rNdap*. long nPos; B+,Z 3* 41$7P[M; [9X1;bO#f public FileAccessI() throws IOException mim]nRd2v {
dY|( this("",0); gwNv;g } ZfS-W&6Z iGM-#{5 YYN=`ST public FileAccessI(String sName,long nPos) throws IOException uYF_sf { 7n5bI\ oSavedFile = new RandomAccessFile(sName,"rw"); Drc\$<9c@ this.nPos = nPos; iYR8sg[' # oSavedFile.seek(nPos); PbCXcs } T~_+\w ^[!LU !DXKn\aQf public synchronized int write(byte[] b,int nStart,int nLen) D}Z].c@E { 4?;1cXXA int n = -1; BoXQBcG]w try{ ur"ckuG!9 oSavedFile.write(b,nStart,nLen); d.sxB}_O n = nLen; hK?uGt
d? } `G,\=c~{A catch(IOException e) y~jTI[kS { L=?Yc*vg e.printStackTrace (); }m(u oT~ } &*r YY\I &?v^xAr?B +!CG'qyN> return n; c[f } ^|(F|Z }"E?#&^ !Hxx6/ } }hhDJ_I5M :voQ#f= Sm{idky)[ /* ["kk.*& **SiteInfoBean.java uveTx */ *q\Ve)E} package NetFox; 5fjmr fMy7pXa_ 9ssTG4Sa public class SiteInfoBean { Quqts(Q) + C5$1K'X@ \GEFhM4) private String sSiteURL; //Site's URL "o+<
\B~ private String sFilePath; //Saved File's Path LY-fp+ private String sFileName; //Saved File's Name ?l
&S:`
L private int nSplitter; //Count of Splited Downloading File p$0G EYwM IR(qjm\V mY+Jju1 public SiteInfoBean() km|;T! {//nSplitter的缺省值为5 q{nNWvL //default value of nSplitter is 5 /q0[T{Wz$ this("","","",5); jA?A)YNQb } P|Dw+lQj lQ
{k BRLrD/8Le public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter)
qH1[BsOx { 4$oNh)+/h sSiteURL= sURL; 40w,:$ sFilePath = sPath; .Ks%ar sFileName = sName; L'iENZI$ this.nSplitter = nSpiltter; tURjIt,I @G@,)`p4? )v
!GiZ"7 } J^m#984 E_[|ZrIO&* e$u=>=jV] public String getSSiteURL() rVB,[4N { W2?6f: return sSiteURL; jdqVS @SD } JR] /\( l 8qCg/ew O~?H\2S public void setSSiteURL(String value) .7 6T<j_ { QpxRYv sSiteURL = value; % put=I } |`B*\\ 1 hd0d
gc 4jbqV public String getSFilePath() <=[,_P6| { FrT.<3 return sFilePath; {]BPSj{B } ek\8u`GC +i HZ* 6[b'60CuZL public void setSFilePath(String value) TwJiYXHw? { -FftEeo7 sFilePath = value; )WuU?Tn& } ,<Zu4bww ,j E'd'$ Fjch<gAofS public String getSFileName() T;!: A { }-4@EC> return sFileName; zW.I7Z0^ } Jmg<mjq/G Gmi ^2?Z( R!{^qHb public void setSFileName(String value) jeLRS8]; { B?n
6o|8 sFileName = value; {| ~ } Kcf1$`F24 utOATjB.z @{/GdB,} public int getNSplitter() `s1>7XWf
{ r{2V`h1/| return nSplitter; cBcfGNTJ~ } 9n9Z l ld,&N8 ggn C #$ public void setNSplitter(int nCount) >1uo5,wrF { 9bu}@#4* nSplitter = nCount; XK#~w:/fB }
h.T]J9;9 } B}S!l>.z zNG]v?JAh ]6s7?07m4 /* 8.JFQ/)i **Utility.java 7 6 nrDE */ +\Uq=@ package NetFox; [u*-~( 0ndk=V ,jH<i.2R public class Utility { 3T1t !q4/5 m{#?fR=9 0SS,fs<w3 public Utility() J n>3c { Lsu_f'p0 >%6a$r~@ ]cQYSN7!SY } fG dT2}gd 80m<OW1 //线程睡眠 ;[nomxu|? public static void sleep(int nSecond) D@W[Nd5MJ { k65V5lb try{ _"0, Thread.sleep(nSecond); 7 +]+S`p } ~t=73fwB catch(Exception e) iEx
sGn]2 {
]F'o e.printStackTrace (); vC#_PI } |NMf'$ } 3g79pw2w= )\aCeY8o //日志 h95a61a,Vy public static void log(String sMsg)
-ElK=q { bv:M
zYS System.err.println(sMsg); OkNBP0e} } 78~;j1^6u J^w!?nk <ztcCRov public static void log(int sMsg) \|@u)n_ { <Pn]{N System.err.println(sMsg); LC>bZ!(i# } e};\"^HH } 'v^Zterr dgEH]9j& 2K:Rrn/cR /* 6[x6:{^J **TestMethod.java ]&b>P ;j: */ h/goV package NetFox; {)`tN&\ XfZ^,'z OUtXu7E$ public class TestMethod { @LyCP4 BT *z^ZH WY& [%r public TestMethod() &"gQrBa { ///xx/weblogic60b2_win.exe #r,LV}*qg try{ |YnT;q SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); C<B+! 16 //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); PKjM1wqaG@ SiteFileFetch fileFetch = new SiteFileFetch(bean); H@uDP fileFetch.start(); ?y/LMja } L#|6Lnp^ catch(Exception e){e.printStackTrace ();} ^{}$o#iof vk><S|[n Mn<#rBE B } e+~Q58oD a(#aEbN?d FW@(MIH public static void main(String[] args) zn)Kl%N^ { "?HDv WP=w new TestMethod(); "3;b,<0 } 'eYM;\%(' } )` z{T 点击下载更多相关资料
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