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/* JX\T
{\m# **SiteFileFetch.java il>x!)?o */ nzE,F\k package NetFox; v1"g!%U6 import java.io.*; ej"o?1l@ import java.net.*; 8F`BJ6=' eA*Jfb v-7Rb)EP public class SiteFileFetch extends Thread { rz[uuY7 msqxPC^I _L:i=.hxN SiteInfoBean siteInfoBean = null; //文件信息Bean ]2xx+P#Y long[] nStartPos; //开始位置 5;K-,"UQ long[] nEndPos; //结束位置 74}eF)(me FileSplitterFetch[] fileSplitterFetch; //子线程对象 sx-Hw4.a" long nFileLength; //文件长度 I"F
.%re boolean bFirst = true; //是否第一次取文件 ><#2O boolean bStop = false; //停止标志 mS)|6=Y File tmpFile; //文件下载的临时信息 vzohq1r5 DataOutputStream output; //输出到文件的输出流 &`
00/p =_?pOq //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) n$OE~YwP{ public SiteFileFetch(SiteInfoBean bean) throws IOException hk5E=t~& { O'!r]0Q siteInfoBean = bean; _r<zSH% //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); _,Rsl$Tk' tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); -e`oW.+ if(tmpFile.exists ()) V$-~%7@>;9 { 1|l)gfcP bFirst = false; VT5cxB< read_nPos(); ,>QMyI
hv } *b6I%MZn else }o!#_N0T { Xew1LPI nStartPos = new long[bean.getNSplitter()]; StdS$XW nEndPos = new long[bean.getNSplitter()]; XYK1-m}2 } A'~%_} f- k|w%R@ { /F rs*AF 0U~;%N+lv } _Ra<|NVQh u^aFj%}]L n ,&/D public void run() ]e@0T{! { !e:iB7< //获得文件长度 {;Y 89&*R //分割文件 k"q!|+&Fs //实例FileSplitterFetch E,<\T6/%q //启动FileSplitterFetch线程 .0Iun+nUD //等待子线程返回 L=
:d!UF try{ S/nj5Lh if(bFirst) +&7[lsD*
{ RVgPH<1X@e nFileLength = getFileSize(); PkPDVv if(nFileLength == -1) (<bm4MPf { d%#!nq{vd System.err.println("File Length is not known!"); m?D
<{BQ; } \uU=O
) else if(nFileLength == -2) (b/A|hl { LC,*H0 System.err.println("File is not access!"); n*vTVt)dJ } <fC@KY># else 2qs>Bshf { @)W(q5)}9" for(int i=0;i<nStartPos.length;i++) .pS&0gBo\ { PcHSm/d0e nStartPos = (long)(i*(nFileLength/nStartPos.length)); jb|mip@`
< } %1-K);SJ for(int i=0;i<nEndPos.length-1;i++) e-CNQnO~ { kCaO\#ta nEndPos = nStartPos[i+1]; ,67"C2Y } "*++55 nEndPos[nEndPos.length-1] = nFileLength; T3USNc51 } W_[|X}lWP } AW,v V;h=8C 5J e/"yGQu //启动子线程 X q}Ucpj fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; HE#,(;1i for(int i=0;i<nStartPos.length;i++) 7BL|x { ||-nmOy fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), Q^z=w![z siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), IVI~1~ nStartPos,nEndPos,i); eu#,WwlG Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); Zg
-]sp] fileSplitterFetch.start(); &8[ZN$Xe" } CS/Mpmsp // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), !c3```* siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); :a_BD // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", ?z2jk nEndPos = " + nFileLength); ?QCmSK=L // fileSplitterFetch[nPos.length-1].start(); w)+wj[6
E V]I:2k5 ?PBa'g //等待子线程结束 ,HFs.9#&B //int count = 0; uh]"(h(> //是否结束while循环 z$JX'(<Z7 boolean breakWhile = false; S~KS9E~\ aq3~!T;W yXJ]U
\ % while(!bStop) J|VK P7 { 9T(L"9r-e write_nPos(); ;B&^yj&; Utility.sleep(500); BjJ,"sT breakWhile = true; c_
La^HS r55qmPhg z;i4N3-: for(int i=0;i<nStartPos.length;i++) Fi mN?s { >_XOc if(!fileSplitterFetch.bDownOver) *IC^IC: { A_!QrM breakWhile = false; O0^?f/&k break; >T<6fpXuk2 } \|CPR6I } 10p8|9rE}B if(breakWhile) yn SBVb!) break; `
^DjEdUN rwiw
Rh %BUEX //count++; _ Yfmxn8V //if(count>4) 3Jk[/.h // siteStop(); H&M1>JtE } |xn#\epy@ *HR+a#o 9B
/s System.err.println("文件下载结束!"); U^MuZ } .%q$d d>> catch(Exception e){e.printStackTrace ();} $@_{p*q } 93j{.0]X M\Se_ I%oRvg|q //获得文件长度 eP "`,< public long getFileSize() zj<ahg%z { \V,c]I
int nFileLength = -1; l^\(ss0~ try{ U4BqO
:sd URL url = new URL(siteInfoBean.getSSiteURL()); bmu6@jT HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); [F+(^- ( httpConnection.setRequestProperty("User-Agent","NetFox"); Y9F)`17 e}c&LDgU `ncNEHh7K int responseCode=httpConnection.getResponseCode(); _a](V6 if(responseCode>=400) @Mm/C?#*O { jpRBER_X processErrorCode(responseCode); %SAw;ZtQ: return -2; //-2 represent access is error `OqM8U
@ } ;j{7!GeKa YTK^ijmU6x MaO"#{i String sHeader; .20V
3 &)n_]R#) `H\)e%] for(int i=1;;i++) Y;Ap9i* { 8nCp\0
//DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); OOnX` //Utility.log(in.readLine()); g+xw$A ou sHeader=httpConnection.getHeaderFieldKey(i); 3X;{vO\a1 if(sHeader!=null) 8'A72*dhX { >H>gH2qp if(sHeader.equals("Content-Length")) [ $pmPr2 { j(iuz^I nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); ~:4~2d| break; >{C\H.N } t6+YXjXK } `0{ S3v else 5,1{Tv` break; WK0C } t V03+&jF } qTT,U9]: catch(IOException e){e.printStackTrace ();} Tk*w3c"$ catch(Exception e){e.printStackTrace ();} WF2NG;f= qi(*ty b7HffO O Utility.log(nFileLength); oKA& An %y&]'A <_Eg?ePW# return nFileLength; \ECu5L4 } {hQ6K)s I9Eu', Kc #|Z //保存下载信息(文件指针位置) ecj7BT[mLI private void write_nPos() TW7:q83{l { Z
o=]dBp. try{ 1D F/6y output = new DataOutputStream(new FileOutputStream(tmpFile)); >xqM5#m`E$ output.writeInt(nStartPos.length); (gwj)?: for(int i=0;i<nStartPos.length;i++) c0_E_~ { V5mlJml2( // output.writeLong(nPos); `]=oo%(h output.writeLong(fileSplitterFetch.nStartPos); vi!YN|}\ output.writeLong(fileSplitterFetch.nEndPos); ['q&@_d7 } t{dSX?<nt output.close(); AQss4[\Dx } }fZ`IOf catch(IOException e){e.printStackTrace ();} u,1}h L catch(Exception e){e.printStackTrace ();} +/rH(Ni } !2tW$BP^ 3GH(wSv9\ c+kU o$ //读取保存的下载信息(文件指针位置) LOvHkk@+ private void read_nPos() + H_WlYg- { +*}{`L-
: try{ +oc
>S DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); jjzA .8?(7 int nCount = input.readInt(); 2;$k(x] nStartPos = new long[nCount]; )J D(` nEndPos = new long[nCount]; ;`dh
fcU for(int i=0;i<nStartPos.length;i++) 4/e60jA { egk7O4zwP nStartPos = input.readLong(); P[ r];e nEndPos = input.readLong(); 47r&8C+&\ } X^@I]. input.close(); 17|np2~ } pI.+"Hz catch(IOException e){e.printStackTrace ();} Sv'y e catch(Exception e){e.printStackTrace ();} l"(6]Z 4 } W_`A"WdT. l@JSK; lFSe?X^ private void processErrorCode(int nErrorCode) p|+B3 { \4d.sy0&>- System.err.println("Error Code : " + nErrorCode); 0d^Z uTN } ({^9<Us e>}}:Ud \HZ9S= //停止文件下载 Q`%R[# public void siteStop() lrWQOYf2 { g(C|!}ex/ bStop = true; |X19fgk for(int i=0;i<nStartPos.length;i++) crcA\lJf fileSplitterFetch.splitterStop(); (u3s"I
d "2?l{4T\ 2@=IT0[E\ } j;1 -p>z } ccFn.($p?, //负责部分文件的抓取 .w?(NZ2~ **FileSplitterFetch.java @}-r&/# */ ->^~KVh& package NetFox; h#r^teui) \2 y5_;O S=`+Ryc import java.io.*; a:TvWzX, import java.net.*; b5G}3)'w 6K`c/) h}`!(K^;3 public class FileSplitterFetch extends Thread { JAjmrX 'XrRhF
( H(
jXI String sURL; //File URL 4mjgt<` long nStartPos; //File Snippet Start Position Y-mK+12 long nEndPos; //File Snippet End Position {c?JuV4q? int nThreadID; //Thread's ID lbdTQ6R boolean bDownOver = false; //Downing is over I` K$E/ns boolean bStop = false; //Stop identical O,2~"~kF FileAccessI fileAccessI = null; //File Access interface i':i_kU cF)/^5Z B+d<F[| public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException {6 6sB{P { a ]Eg!Q this.sURL = sURL; TjMe?p this.nStartPos = nStart; h%; e0Xz| this.nEndPos = nEnd; X?:o;wB nThreadID = id; rl#vE's6.e fileAccessI = new FileAccessI(sName,nStartPos);//定位 / $ :j } 57a2^ OO dSKf8 j$UV/tp5T public void run() >T2LEW { VV4Gjc while(nStartPos < nEndPos && !bStop) 9Jf)!o8 { i,A#&YDl 4/ kv3rv 0P^L }VVX try{ u]NZ`t%AP URL url = new URL(sURL); =*qD4qYA HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); &6 s) X httpConnection.setRequestProperty("User-Agent","NetFox"); DS-0gVYeDW String sProperty = "bytes="+nStartPos+"-"; ?[<Tx-L httpConnection.setRequestProperty("RANGE",sProperty); j"^+oxH Utility.log(sProperty); }8|[;Qa`y /={Js* fj7|D'c InputStream input = httpConnection.getInputStream(); -9
!.m //logResponseHead(httpConnection); T9)nQ[ &cWjEx NjPDX>R\K byte[] b = new byte[1024]; 8dD2 int nRead; <!-sZ_qq while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) C51bc6V { CQ`=V2:"ON nStartPos += fileAccessI.write(b,0,nRead); LE5.b]tv2 //if(nThreadID == 1) ^;,M}|<h // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); a?|vQ*W } *<N3_tx" [ EFMu;q iovfo2!hD Utility.log("Thread " + nThreadID + " is over!"); 09A
X-JP bDownOver = true; 2%*MW"Q //nPos = fileAccessI.write (b,0,nRead); ] Z8Vj7~ } b2 _Yu^ catch(Exception e){e.printStackTrace ();} t?o,RN: } b|Q)[ y] } QB.J,o*XD4 CQel3Jtt. du$|lxC //打印回应的头信息 W$U0[^1 public void logResponseHead(HttpURLConnection con) O#wpbrJ { ,B4VT 96* for(int i=1;;i++) 6sIL.S~c) { PB%-9C0 String header=con.getHeaderFieldKey(i); L
%ip> if(header!=null) M8H5K //responseHeaders.put(header,httpConnection.getHeaderField(header)); +^*iZ6{+7 Utility.log(header+" : "+con.getHeaderField(header)); PJxH7|GSi else '(?
uPr break; }:0uo5B7 } (feTk72XX } ?USQlnr:R/ G}
eUL|S 8WE{5#oi public void splitterStop() 0 a]/%y3V { ~~/xRs bStop = true; ^c~)/F/cF } LjL[V'JL %WqNiF0- {`2R,Jb%S } E?(xb B o=FE5"t 85EQ5yY /* #%J5\+ua **FileAccess.java $+.l*] *//文件访问(定位,写) l3N I$Zu package NetFox; 7t,t` import java.io.*; 2[0JO.K
4 *:i1Lv@ .2J
L$" public class FileAccessI implements Serializable{ VMoSLFp^R jx acg^c //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 v]__%_ RandomAccessFile oSavedFile; ?+T^O?r|O long nPos; >]o}}KF? .0R v(Y \om%Q[F7a public FileAccessI() throws IOException {3N'D2N { L4uFNM] this("",0); OL_{_K(w } 8M@BG8 0%!rx{f#\ RwS@I/ public FileAccessI(String sName,long nPos) throws IOException Y>jiXl?&
{ AeAp0cbet oSavedFile = new RandomAccessFile(sName,"rw"); }|%eCVB this.nPos = nPos; Xf)|Pu oSavedFile.seek(nPos); 099sN"kf } ~=R SKyzt q80S[au ]*7Y~dO public synchronized int write(byte[] b,int nStart,int nLen) EUsI%p { oK{ V7 int n = -1; UT}i0I9 try{ oD}uOC}FS{ oSavedFile.write(b,nStart,nLen); Kscd}f)yx? n = nLen; EGl^!.' } "UwH\T4I catch(IOException e) czlFr|O; { ,lCgQ0}< e.printStackTrace (); xkOpa,=FI } y4+;z2'> S*AERm Lg"C ] return n; e.c3nKXZ q } KR7@[ K'#E3={tt +H$!a } =IAsH85Q qY 4#V k $=?@*p /* [pVamE **SiteInfoBean.java /c):}PJ^#7 */ `K,1K package NetFox; G\NPV' *.)tG ^&g=u5
d0 public class SiteInfoBean { wcDRH)AW. !bV5Sr^
]({~,8s private String sSiteURL; //Site's URL ]
}f9JNf$ private String sFilePath; //Saved File's Path Pz$R(TV private String sFileName; //Saved File's Name q\\gpCgp private int nSplitter; //Count of Splited Downloading File vFEQ7qI DNP13wp@ .jMq public SiteInfoBean() A<;SnXm {//nSplitter的缺省值为5 %kgkXc~6|x //default value of nSplitter is 5 +**!@uY this("","","",5); .5 } h<~7"ONhV Le%ZV%, wj[$9UJb public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) "kZ[N'z( { q\H[am sSiteURL= sURL; iX3HtIBj' sFilePath = sPath; N>>uCkC sFileName = sName; tDAhyy73 this.nSplitter = nSpiltter; "fq{Y~F%` C!7>1I~5 r1fGJv1!o } B7]MGXC P'Q+GRpSw D-N8<:cA public String getSSiteURL() XV^1tX>f{ { Hty0qr3 return sSiteURL; A/`%/0e } KF4PJi;* z5TuGYb< %6_AM public void setSSiteURL(String value) qTQBt} { z3uW)GQ. sSiteURL = value; yv)ux:P&+ } sN5B7)Vc ~Ch+5A; *}8t{ F@k public String getSFilePath() W0}B'VS.I { qoAj]
") return sFilePath; c_elShK8# } MTUn3;c/ O(_[ayE &5:tn=E public void setSFilePath(String value) B-l'vVx { Uk\Id~xLV sFilePath = value; [k-+AA>: } B 2ec@]uD` 36am-G p0pWzwTG3 public String getSFileName() @}kv-* { xCtmXo return sFileName; E}ZJ)V7 } A2|Ud_ RVeEkv[qp _/O25% l public void setSFileName(String value) Ge<nxl<Bd { @]ao"ui@/ sFileName = value; 5ms""LD/ } ]Zmj4vK J XQS9,Hl H9CS*|q6r public int getNSplitter() B,{K*-7)MX { MR}Agu#LG return nSplitter; ciMzf$+G$ } K#"O
a
h &~W:xg(jN zk( U8C+ public void setNSplitter(int nCount) 2,*M|+W~ { ."FuwKSJCo nSplitter = nCount; `hb%+-lj+ } D::rGB?.b } G\(|N9^: yiO.z F8apH{&t /* 50={%R **Utility.java |DsnNk0c */ xt*u4% package NetFox; 5L!y-3 tToTxf~ ,TFIG^Dvq public class Utility { `]W|8M |6<p(i7 L`24?Y{ public Utility() Z4\=*ic@ { w4gg@aO |iwP:C^\mJ _]:z \TDn } #_u~/jhX V5rST + //线程睡眠 KY~-;0x public static void sleep(int nSecond) BT(CM,bp { rOVVL%@QqJ try{ w`5xrqt@ Thread.sleep(nSecond); Ih"XV } cCxBzkH6 catch(Exception e) p3^m9J { ,S!azN= e.printStackTrace (); }+sT4'Ah> } Er{>p|n= } yNTK . <%"b9T`' //日志 hq #?kN public static void log(String sMsg) \o^2y.q:> { j*vYBGD System.err.println(sMsg); #Q
/Arq } =y-@AU8 $b mLu=9 ,KFapz! public static void log(int sMsg) (I./ Uu% { }1upi=+aE System.err.println(sMsg); 1aTB%F } :*KHx|Q } L'kmNVvYN P ! _rEV .Fp4:
e /* q?8|
[. **TestMethod.java BSVxN */ 9_5ow package NetFox; |/)${*a4n :n-]>Q>5=k s']Bx= public class TestMethod { q0zr
E5 sjV!5Z \vO,Ee~#W public TestMethod() 5yz(>EVH { ///xx/weblogic60b2_win.exe @8I4[TE try{ AQwdw>I-FX SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); &*aIEa^ //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); 6g)GY"49 SiteFileFetch fileFetch = new SiteFileFetch(bean); ,JQp'e fileFetch.start(); ]'=)2
.} } VB*oGG catch(Exception e){e.printStackTrace ();} 2V#>)R#k 6l:qD` _ D-._z:_ } +O?KNZ 7](KV" %V Xx>X5Fy public static void main(String[] args) pWJFz- { V:
TM] new TestMethod(); L bmawi^ } JVSA&c%3 } ybKWOp:O 点击下载更多相关资料
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