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/* qe #P?[ **SiteFileFetch.java [qdRUV' */ *eIJwXE package NetFox; .R)PJc5^ import java.io.*; x? ?pBhJH import java.net.*; 79nG|Yj|\ ~UyV< <Gav5Rc public class SiteFileFetch extends Thread { iY`%SmB MWI4Y@1bS =81@o,1w SiteInfoBean siteInfoBean = null; //文件信息Bean N+zKr/ long[] nStartPos; //开始位置 \Z^TXyu long[] nEndPos; //结束位置 .udv"?!z FileSplitterFetch[] fileSplitterFetch; //子线程对象 i.=w]S
j long nFileLength; //文件长度 iP@ZM=&wz boolean bFirst = true; //是否第一次取文件 wx\v:A boolean bStop = false; //停止标志 h8 'v d3 File tmpFile; //文件下载的临时信息 x&^_c0fn DataOutputStream output; //输出到文件的输出流 tBNoI <F'X<Bau //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) RlheQTJ public SiteFileFetch(SiteInfoBean bean) throws IOException G+F#n6Vx {
:,WtR siteInfoBean = bean; eFBeJZuE| //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); _8Z_`@0 tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); j>]nK~[ka if(tmpFile.exists ()) kgy:Q' { p(PMZVV` bFirst = false; PGYXhwOI read_nPos(); I+Jm>XN } L,SGT8lL else <cZGxff01 { %ThyOl@O nStartPos = new long[bean.getNSplitter()]; fq5_G~c= nEndPos = new long[bean.getNSplitter()]; ONx(] } O@MGda9_; 53c 0
E ?|WoIV. {D?50Q } bKj%s@x 3 N7[.I>A M~WijDj public void run() `Q+(LBP { s"9`s_p`d //获得文件长度 I&MY{f //分割文件 a\IP12F? //实例FileSplitterFetch a^Tmu //启动FileSplitterFetch线程 |fxA|/s[< //等待子线程返回 0q.Ujm=,z try{ lrWV#`6!+ if(bFirst) YFE&r { _$wmI/_JM nFileLength = getFileSize(); WuPH'4b 5 if(nFileLength == -1) (T>nPbv) { rEHk w
' System.err.println("File Length is not known!"); GiP`dtK
} [01.\eh else if(nFileLength == -2) '\Jj8oJQj { fGw^:,B System.err.println("File is not access!"); B;R.# ^@/ } BYO"u6 else chV9_(8 { $={:r/R`i for(int i=0;i<nStartPos.length;i++) T21ky>8E { e%4:)
IV!; nStartPos = (long)(i*(nFileLength/nStartPos.length)); JT "B>y> } Dq36p${\W for(int i=0;i<nEndPos.length-1;i++) >ELlnE8 { }"|"Q7H nEndPos = nStartPos[i+1]; 6'kS_Zu{< }
c1$ngH0 nEndPos[nEndPos.length-1] = nFileLength; u5 {JQO } >H(i^z/c
} nB%;S D?C)BcN aO@7O* //启动子线程 tp6M=MC% fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; eh4gQ^l for(int i=0;i<nStartPos.length;i++) J8M$k/"X { Zm"{V iv] fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), ndjx|s)E siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), 5Xl/L nStartPos,nEndPos,i); 'fcMuBc+4 Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); "Fy7K#n fileSplitterFetch.start(); 0O\SU"bP } {r>.G7P6 // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), {%VV\qaC siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); pl5P2&k // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", f6_];]yP nEndPos = " + nFileLength); ;<$H)`* // fileSplitterFetch[nPos.length-1].start(); s[K^9wz yz-,)GB6 &ISb~5 //等待子线程结束 :Xn7Ha[f //int count = 0; :l2g# * c //是否结束while循环 M
t*6}Cl boolean breakWhile = false; _*IPk qw7@(R'" DUL4noq{ while(!bStop) Kx.X 7R { MZpK~c1` write_nPos(); aM@z^<Ub Utility.sleep(500); Q\GDrdA breakWhile = true; K,6b3kk &K43x&mFF uQ=^~K :Z~ for(int i=0;i<nStartPos.length;i++) )J_\tv { ew;ur? if(!fileSplitterFetch.bDownOver) ]J* ,g, { -DN8Yb breakWhile = false; cFN'bftH4 break; EyI}{6~F } 4-kZJ\] } !IC-)C,q if(breakWhile) v?0r`<Mn break; &-czStQ kdxz ! WYIQE$SEv //count++; /erN;Oo%< //if(count>4) Dy]I8_ // siteStop(); >6~k9>nDb< } <W`#gn0b6 4\pWB90V RP2_l$ System.err.println("文件下载结束!"); WpS1a440 } (faK+z,*6R catch(Exception e){e.printStackTrace ();} YXU|h } $B#6tk~u b1gaj"] \.f}W_OF //获得文件长度 G/d4f?RU public long getFileSize() 7_wJpTz { T"p(]@Ng int nFileLength = -1; ?\U!huu try{ yJsH=5A URL url = new URL(siteInfoBean.getSSiteURL()); &f>eQS=( HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); Gy,u^lkk: httpConnection.setRequestProperty("User-Agent","NetFox"); j7MO'RX`& 9D 0dg( -UZ@G~K int responseCode=httpConnection.getResponseCode(); ]&ixhW if(responseCode>=400) 4D$;KokZ { g|Y] wd processErrorCode(responseCode); tM,%^){p$ return -2; //-2 represent access is error 'JdkUhq1V } 9Ew7A(BG_3 B-*E:O0y ewuXpv%vwW String sHeader; ="%W2 !@I}mQ ~ ExSO|g]% for(int i=1;;i++) Q \]Xm> { 5tv<8~:K //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); uNHdpni //Utility.log(in.readLine()); TZ;p0^( sHeader=httpConnection.getHeaderFieldKey(i); e8h,,:l3j if(sHeader!=null) '~ 4pl0TWc { T"T;`y@( if(sHeader.equals("Content-Length")) DY{cQb { e,k2vp!<& nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); KtB!"yy# break; Z?NEO>h7 } )9B:wc" } G~wF nl% else HPQ/~0$ break; %d m-?` } G){g } h{}mBQl catch(IOException e){e.printStackTrace ();} [pg}S#A catch(Exception e){e.printStackTrace ();} '4OcZ/oI #fs|BV
! b@t5`Y-+K Utility.log(nFileLength); IN7<@OS7 xU
S]P)R 9p@C4oen return nFileLength; ?/M_~e.P } V8-h%|$p3W 0IT@V5Gdj BHj\G7,S //保存下载信息(文件指针位置) JI|6B private void write_nPos() ukuo:P<a
{ W3&tJ8*3 try{ ~%ozgzr^ output = new DataOutputStream(new FileOutputStream(tmpFile)); U>S`k6 output.writeInt(nStartPos.length); "R9Yb,tIN for(int i=0;i<nStartPos.length;i++) Qn:kz*: { PzZZ>7_6S // output.writeLong(nPos); XM|%^ry output.writeLong(fileSplitterFetch.nStartPos); i3mAfDF output.writeLong(fileSplitterFetch.nEndPos); b-@\R\T } 7S$&S; output.close(); /^#G0f*N } |%D%0TR&Q catch(IOException e){e.printStackTrace ();} Zg:gY"^ catch(Exception e){e.printStackTrace ();} 7m9"8
} O'NW
Ebl/ c 5`US 68R1AqU_ //读取保存的下载信息(文件指针位置) H]31l~@] private void read_nPos() IeF keE { ~VTs:h try{ Y7U&Q:5' DataInputStream input = new DataInputStream(new FileInputStream(tmpFile));
1;| LI? int nCount = input.readInt(); GZ}/leR nStartPos = new long[nCount];
BRbV7&
nEndPos = new long[nCount]; ohc1 ~?3b for(int i=0;i<nStartPos.length;i++) XidxNPz0^ { #T~&]|{, nStartPos = input.readLong(); F9XT
lA nEndPos = input.readLong(); !:fv>FEI9 } Vf-5&S&9 input.close(); Omag)U)IPh } cs_}&!c{ catch(IOException e){e.printStackTrace ();} Zv qn%K], catch(Exception e){e.printStackTrace ();} y/_wx(2 } vt]F U< oP,9#FC|( t7F.[uWD private void processErrorCode(int nErrorCode) `_ (~ Ud { > %*B`oqo System.err.println("Error Code : " + nErrorCode); VY'Q|[ } ; !$m1 dEp/dd~(&
?RD *1 //停止文件下载 . p^xS6e{ public void siteStop() +=cam/A { We`'>'W0 bStop = true; IS]{}Y\3H for(int i=0;i<nStartPos.length;i++) gbOCR1PBg fileSplitterFetch.splitterStop();
L2-^!' mog9 jw (TSqc5^H } ~!+h?[miV } V`fL%du,3 //负责部分文件的抓取 5)+F( **FileSplitterFetch.java #iis/6" */ m/USC'U% package NetFox; A%ywj'|z *,#q'!Hq
S2=%x. import java.io.*; 0^_MN~s(X import java.net.*; 3;$bS<> PDw{R]V+ d,'!.#e public class FileSplitterFetch extends Thread { ]1fZupM^6 <fM>Yi5 9Z!lmfnJ String sURL; //File URL ^Gz{6@TY5 long nStartPos; //File Snippet Start Position &v#`t~ long nEndPos; //File Snippet End Position )&Z>@S^ int nThreadID; //Thread's ID K&pM o. boolean bDownOver = false; //Downing is over G%w_CMfH boolean bStop = false; //Stop identical izt^Wi| FileAccessI fileAccessI = null; //File Access interface ZTf_#eS$ %"7WXOv&z dl[ob,aCK public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException boQ)fV" { rB]W,8~% this.sURL = sURL; *Wyl2op6 this.nStartPos = nStart; 0#|7U_n this.nEndPos = nEnd; yMIT( nThreadID = id; =Nl5{qYz^& fileAccessI = new FileAccessI(sName,nStartPos);//定位 kEK[\f VE } ."JzDs :|XCnK0 `*9EKj public void run() |Is'-g! { Ysk,w,K while(nStartPos < nEndPos && !bStop) a%[q
|oyR { )|T`17- p~>_T7ze {'(ej5,6 try{ ATO
5 URL url = new URL(sURL); Z>{*ISvpq HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); b:x7)$( httpConnection.setRequestProperty("User-Agent","NetFox"); }|He?[TR String sProperty = "bytes="+nStartPos+"-"; ib50LCm httpConnection.setRequestProperty("RANGE",sProperty); <kc]L x Utility.log(sProperty); 0_V*B[V 75(W(V(q iwz`
x InputStream input = httpConnection.getInputStream(); M]0^ind //logResponseHead(httpConnection); }=pOiILvD QV)}3pW 7x+=7,BZd byte[] b = new byte[1024]; FuMq|S int nRead; r
}
7:#XQ while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) Hs<n^fyf { e 2*F;.) nStartPos += fileAccessI.write(b,0,nRead); LV=^jsQ5 //if(nThreadID == 1) ^?Vq L\V5 // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); DB Xm } ;E2kT
GT XZBj=2~-3 j&llrN Utility.log("Thread " + nThreadID + " is over!"); AFtCqq#[ bDownOver = true; El1:?4; //nPos = fileAccessI.write (b,0,nRead); zPE#[\O21B } %Ht^yemQ catch(Exception e){e.printStackTrace ();} ;zm
ks] } ):}Fu } gL,"ef+nM p[;8 b.6ZfB,+G //打印回应的头信息 T:@7S public void logResponseHead(HttpURLConnection con) Bb_}YU2# { Uk"Y/Ddm for(int i=1;;i++) 6 <r2*` { YZ{jP?x String header=con.getHeaderFieldKey(i); :>ZzP: QD if(header!=null) zK /f$} //responseHeaders.put(header,httpConnection.getHeaderField(header)); ^OjvL6A/p Utility.log(header+" : "+con.getHeaderField(header)); %d-`71|lG^ else :D^Y? break; MyM+C} } 7n<#y;wo } }RDb1~6C Z3I L8 xK=J.>h3 public void splitterStop() IPkA7VhFF { X#Ak'%J bStop = true; S^)WYF5 }
j$%yw4dsj )j(fWshP B{N=0 cSi } haik w+3>DEfz u,!4vKx /* T!&jFy*W **FileAccess.java @?j@yRe *//文件访问(定位,写) )MMhlcNC package NetFox; <Q\H import java.io.*; g!.Ut:8L9 sOjF?bCdO O'@m4@L public class FileAccessI implements Serializable{ 0\ZaMu # wFn@\3%l` //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 widI
s[
) RandomAccessFile oSavedFile; >9(7h&[Y long nPos; &l?N:(r hq]xmM?& a$laRtId7 public FileAccessI() throws IOException 3a/[."W
u { N!.kq4$. this("",0); rSzQUn< } ja L$LJV X9 z:D> %e(9-M4* public FileAccessI(String sName,long nPos) throws IOException P7cge { %
i%ew4 oSavedFile = new RandomAccessFile(sName,"rw"); %f>X-*}NI- this.nPos = nPos; 2z[r@}3 oSavedFile.seek(nPos); p"g1V7B } D8q3TyCj% )#)nBM2\ ;K>{_kf public synchronized int write(byte[] b,int nStart,int nLen)
kT>r<`rt { e!.7no int n = -1; rL.<Z@- try{ @*bvMEE oSavedFile.write(b,nStart,nLen); :QxL 9&" n = nLen; +p8qsT#7 } T-hU+(+hg catch(IOException e) 9*7Hoi4Ji { M"
xZz e.printStackTrace (); JTSq{NN } v&k>0lV,^ l7!U),x%/U )PsN_ 42~ return n; XKpL4]{&q4 } m]{<Ux )RpqZe/h4 y|FBYcn#F } v@F|O8t:s E_ o{c5N %kFTnXHK /* Qx9>,e6+ **SiteInfoBean.java +3NlkN# */ ./7&_9|< package NetFox; }<6oFUZ T][-'0!
"$`wk public class SiteInfoBean { D2>hMc 4.,KEt'H <K=@-4/Bp private String sSiteURL; //Site's URL [K"U_b}w private String sFilePath; //Saved File's Path e6tH/`Uln private String sFileName; //Saved File's Name N*_/@qM> a private int nSplitter; //Count of Splited Downloading File z Y$X|=f HA$^ *qn zz7Y/653 public SiteInfoBean() 4iYgs-, {//nSplitter的缺省值为5 |@T5$Xg]5 //default value of nSplitter is 5 o(B<!ji~' this("","","",5); J=f:\]@Oy } v_?s1+w {bAWc. NB|RZf9M public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) 0A)
Vtj$ { Yio>ft&g] sSiteURL= sURL; xI/{)I1f sFilePath = sPath; zbF:R[) sFileName = sName; m;;0 Cl this.nSplitter = nSpiltter; 4jC4X* >%PL_<Vbv [dSDg2] } [4K9|/J 7yq7a[Ra LUe>)eqw public String getSSiteURL() ~!a~C~_ { 2b6? 9FX* return sSiteURL; ``2QOu 1 } _IQU<Za fPh}l F20wf1^ public void setSSiteURL(String value) Q:-%3)g<< { Dz"u8 f sSiteURL = value; ? 6yF{!F* } PV,kYM6 yV 9]_k Z@>=& public String getSFilePath() 7- *(a { I]uOMWZs return sFilePath; (<d&BV- " } 'S%} ?#J . Ce&9l }skRlC public void setSFilePath(String value) m>Yo9/XpZ { 7dM6;`V^ sFilePath = value; 1_33;gP } #Lhj0M;a LK
?$)x$nS` public String getSFileName() Tc'{i#%9j { #f|NM7 return sFileName; 'XZI{q2i } E1U 4v&P gW6G+ 6oTbn{=UUq public void setSFileName(String value) %h/#^esi { ^\7 x5gO sFileName = value; 2$SofG6D} } ]RJb; Oet#wp/I 1Rb XM n public int getNSplitter() !yV,|)y5F { Th&Wq return nSplitter; DJD ]aI } V#-qKV _v~D{H&} HX /GLnY/X public void setNSplitter(int nCount) N SxPN: { $tt0D?$4 nSplitter = nCount; oqd
N5+xt } M3jv aI } E1{:z" H/p-YtY 3j=%De /* \CJx=[3( **Utility.java bCE7hutl */ M0Kh>u package NetFox; xtIehr0{$I 8XH |T^5 8f{}ce'E* public class Utility { quCWc2pXX n ]6
0 wEHAkc)Q public Utility() UgD'Bi { ['}^;Y?*o qUoMg%Z%l \AtwO } Kl46CZs#8 HM$`z"p5jg //线程睡眠 MWn L#! public static void sleep(int nSecond) mSk :7ozZ { v]`A_)[ try{ \: _.N8" Thread.sleep(nSecond); Y#SmZ*zok
} ?2;n=&ZM catch(Exception e) g~^{-6Vg { ot>EnHfV e.printStackTrace (); \yX !P1 } U$/Hp#~X } +2au
;^N Hh/
-^G //日志 AHMV@o`V public static void log(String sMsg) VM\Z<}C { LL$,<q%(P System.err.println(sMsg); PgG |7=' } [b
k&Nd[
^ ]6
80h ~&[P`
Z$ public static void log(int sMsg) n?P 5pJ { $?/Xk%d+ System.err.println(sMsg); @)2V"FE4i } uuUVE/^V' } ev: !,}]w ,~j$rs`Z Q~w G(0'8 /* <v7KE*# **TestMethod.java q@MjeGs% */ .e
_D3Xp< package NetFox; 4QKE{0NE ,m?UFRi ?_Dnfa_ public class TestMethod { d-N"m I- gh #w%g1g y~A7pzBZ= public TestMethod() l-^XW?CfL { ///xx/weblogic60b2_win.exe H;t8(-F@' try{ $vGEY7, SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); d a?th //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); o4[2`mT SiteFileFetch fileFetch = new SiteFileFetch(bean); 18/@:u{ fileFetch.start(); M(h H#_$ } ;\*Od?1 catch(Exception e){e.printStackTrace ();} ,@>rubUz f`9rTc ^9*|_\3N } w[A3;]la #c)Ou!Ldb QV
H'06"{ public static void main(String[] args) s-N?Tzi { 9;v"bcQ new TestMethod(); V+a%,sI } *r?51*J } + $a:X 点击下载更多相关资料
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