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/* mNb+V /*x3 **SiteFileFetch.java Q.z2 (& */ V9Au\ package NetFox; MYN1zYT6j import java.io.*; 8^dGI9N
import java.net.*; L'aMXNO $ZcmE<7k aj(M{gFq~ public class SiteFileFetch extends Thread { )&_{m
K /3KEX{'@U +% U@ SiteInfoBean siteInfoBean = null; //文件信息Bean y{j>4g$:z long[] nStartPos; //开始位置 U-WrZ|- long[] nEndPos; //结束位置 ,P auP~L FileSplitterFetch[] fileSplitterFetch; //子线程对象 B@iIj<p~ long nFileLength; //文件长度 _F@FcFG1Z* boolean bFirst = true; //是否第一次取文件 J,7_5V@jJ boolean bStop = false; //停止标志 V{d"cs>9 File tmpFile; //文件下载的临时信息 n8:2Z> DataOutputStream output; //输出到文件的输出流 y:2o-SJn q8kt_&Ij //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) "hy#L
0\t public SiteFileFetch(SiteInfoBean bean) throws IOException "H G:by { e}K;5o=I siteInfoBean = bean; "K\Rq+si //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); f^$\+H"W tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); \s~W;m if(tmpFile.exists ()) 3J(STIxg { kY_UY~E bFirst = false; OVj,qL) read_nPos(); 9 z3Iwl } j<l>+.,
U else E> 4
\9 { )$th${pd#v nStartPos = new long[bean.getNSplitter()]; Uj!L:u2b nEndPos = new long[bean.getNSplitter()]; 4
Qw;r } %+pXzw`B <78>6u/W% !2{MWj 58v5Z$%-- } u[dI81` Q| xPm: u"|.]r public void run() koqH~>ZtD { E&[ox[g{ //获得文件长度 ~4 \bR //分割文件 7,+:QY@ //实例FileSplitterFetch )%MBo.NL //启动FileSplitterFetch线程 `q
xg //等待子线程返回 As)-a5! try{ ,%,}[q?]d if(bFirst) bjvi`jyL3k { wkIH<w|jb nFileLength = getFileSize(); P}VD}lEyO if(nFileLength == -1) ^ )+tn { *{-XN System.err.println("File Length is not known!"); ~V./*CQ\c } .5I1wRN49 else if(nFileLength == -2) a\%g_Q){ { 0e}LZ,9e System.err.println("File is not access!"); kXOlZC } SQz>e else ?iia { S8]g'! for(int i=0;i<nStartPos.length;i++) 99ZQlX { RKBtwZx>f nStartPos = (long)(i*(nFileLength/nStartPos.length)); sF<4uy } zF{z_c#3@ for(int i=0;i<nEndPos.length-1;i++) yXEC@#?| { Z>X-u eV nEndPos = nStartPos[i+1]; ?VzST } } L~0B nEndPos[nEndPos.length-1] = nFileLength; FvvF4
,e5 } `Zk?.1*2/ }
Ng-3|N Pd@?(WQ ^$T>3@rDB //启动子线程 1= <Qnmw fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; ~Aq UT]l for(int i=0;i<nStartPos.length;i++) :_?>3c}L { GJ((eAS) fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), bF}~9WEa siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), `U;4O)`n nStartPos,nEndPos,i); Nz]\%c/- Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); xUeLX`73 fileSplitterFetch.start(); F-ijGGL# } A!j&g(Z"Q // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), ~5JXY5*o siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); i4uUvZf // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", IB?5y~+h nEndPos = " + nFileLength); 9pk<=F // fileSplitterFetch[nPos.length-1].start(); Z&21gN Uh9$e 2} T"|56 //等待子线程结束 r?Z8_5Y //int count = 0; &]ImO
RN //是否结束while循环 IRcZyry boolean breakWhile = false; :Tjo+vw7$H &1VC0"YJWy >Vg<J~[g while(!bStop) ^WVr@6 { |#MA?oz3T write_nPos(); JM!o(zbt Utility.sleep(500); ,I)/ V>u breakWhile = true; ?p}m[9@ mT)iN`$Y@ OP>'<FK for(int i=0;i<nStartPos.length;i++) fwOvlD&e { ]^.#d if(!fileSplitterFetch.bDownOver) jLZ~9FXF2 { \a}%/_M\ breakWhile = false; N]5-# break; !rwv~9I } //AS44^IS } #5'9T:8 if(breakWhile) @y}1%{,% break; k.rZj|7 L ymzlRs1^Ct N.3M~0M*
//count++; }9@,EEhg //if(count>4) }t]CDa_n // siteStop(); s K s
D } /<M08ze >0u4>=# \5O4}sm$* System.err.println("文件下载结束!"); :}j{ NM# } J;G+6C$: catch(Exception e){e.printStackTrace ();} zf6k% } :,:r ` NcWy #:236^xYS //获得文件长度 U?H!:?,C public long getFileSize() _ea!psA0 { +Pn+&o;D int nFileLength = -1; )Ibp%'H try{ EAx@a% URL url = new URL(siteInfoBean.getSSiteURL()); rbs:qLa% HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); ,qt9S0QS httpConnection.setRequestProperty("User-Agent","NetFox"); ,AWN *OS Joe k4t&0< \J:/l|h int responseCode=httpConnection.getResponseCode(); M"5,8Q`PkI if(responseCode>=400) +MXI;k_ { _kgw+NA&-H processErrorCode(responseCode); wD"Y1?Mr return -2; //-2 represent access is error \~U8<z } JZN'U<R 41,Mt W}nD#9tL String sHeader; $I+QyKO9k
<{7B ^' t&0pE(MO/ for(int i=1;;i++) FhS:. { ?MyXii<a //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); e=TB/W_ //Utility.log(in.readLine()); b6Dve] sHeader=httpConnection.getHeaderFieldKey(i); kW5g]Q if(sHeader!=null) =A04E { Ll%[}C?~]? if(sHeader.equals("Content-Length")) $^}?98m { }"%tlU!} nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); Bo_Ivhe[m break; 9>\s81^ } b=`h""u } xR\$2( else 05.^MU?^U break; TU7 Qt< } LEWeybT } 8`kK)iCq catch(IOException e){e.printStackTrace ();} CR&v z3\Q catch(Exception e){e.printStackTrace ();} -dZ7;n5&_ 0vt?yD R/xeC [r Utility.log(nFileLength); MAQkk%6[g U,~\}$<I !z$.Jcr1 return nFileLength; Y6&w0~?! } oaM $< -6(C^X% W{Ine>
a' //保存下载信息(文件指针位置) :WJ[a# private void write_nPos() STL&ZO { O2-9Oo@#, try{ G!uoKiL output = new DataOutputStream(new FileOutputStream(tmpFile)); 6ix8P;;}# output.writeInt(nStartPos.length); fOtL6/? for(int i=0;i<nStartPos.length;i++) 8:|F'{<<b { AK} wSXF // output.writeLong(nPos); I!|_C~I` 2 output.writeLong(fileSplitterFetch.nStartPos); ?ep93:j output.writeLong(fileSplitterFetch.nEndPos); >PGW>W$ } 5O%Q*\( output.close(); NDWpV } v&;q4b4 catch(IOException e){e.printStackTrace ();} ,dLh`t<\ catch(Exception e){e.printStackTrace ();} %!mJnc% } NVAt-u0LB yL7D;<!S& u`O
xY //读取保存的下载信息(文件指针位置) P=OHiG\z private void read_nPos() #;#
V1 { 4
>at#Zc try{ yF0\$%H>$ DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); T6*naH int nCount = input.readInt(); (i^{\zv nStartPos = new long[nCount]; 4siNY4i" nEndPos = new long[nCount]; gu7mGHn- for(int i=0;i<nStartPos.length;i++) uckag/tv { yF8 av=<{ nStartPos = input.readLong(); P4-`<i]!S nEndPos = input.readLong(); q;3.pRw( } }_vE
lBh6$ input.close(); BxS\"W } vd6Y'Zk|F6 catch(IOException e){e.printStackTrace ();}
0GK<l catch(Exception e){e.printStackTrace ();} yZj:Kp+7 } =*
oFs|v KuL2X@)} 4Z12Z@ A#7 private void processErrorCode(int nErrorCode) M_<O'Ii3 {
<C`qJP- System.err.println("Error Code : " + nErrorCode); CkKr@. dV } 4C\>JGZvq r({!ejT{U PGF=q|j9K //停止文件下载 *7u~` public void siteStop() _~ZNX+4 { /7/d
u[P6 bStop = true; w7@fiH{ for(int i=0;i<nStartPos.length;i++) 3(0k!o0" fileSplitterFetch.splitterStop(); ze@NqCF (A|Gb2 X DK;p6_tT } D~E1hr&Vd> } a|Io)Qhr //负责部分文件的抓取 tpOMKh.` **FileSplitterFetch.java h,o/(GNnW */ $O9Nprf package NetFox; u.ubw(vv AIgJ,=9K #Drs=7w import java.io.*; Ab ,n^ import java.net.*; :vZ8n6J[ 'Alt+O_ SR7$m<0t* public class FileSplitterFetch extends Thread { 0*^ J;QGE Cgq/#2BM C8 9c2 String sURL; //File URL PY-
1 oP long nStartPos; //File Snippet Start Position =
_X#JP79 long nEndPos; //File Snippet End Position :34]}`- int nThreadID; //Thread's ID `?r]OVe{y boolean bDownOver = false; //Downing is over FKRO0%M4}Z boolean bStop = false; //Stop identical #}*w &y FileAccessI fileAccessI = null; //File Access interface ,#:* dl 6;6a.iZ (hWr!(>C4] public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException \n$s5i- { 5G"LuA this.sURL = sURL; o=@0Bd8 this.nStartPos = nStart; d$Y3 a^O| this.nEndPos = nEnd; t\Pn67t nThreadID = id; nm5zX, fileAccessI = new FileAccessI(sName,nStartPos);//定位 x(pq!+~K } |U)m'W-(q G347&F) d*Q:[RUf, public void run() HxCq6Y_m< { G8b/eWtP while(nStartPos < nEndPos && !bStop) 5mxHOtvtWM { /J!C2 z(V?pHv+ D#Fe\8!l try{ =%P'?(o| URL url = new URL(sURL); acr@erk HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); AT Dm$ * httpConnection.setRequestProperty("User-Agent","NetFox"); U
?'$E\ String sProperty = "bytes="+nStartPos+"-"; E`s9SE httpConnection.setRequestProperty("RANGE",sProperty); Rj6:.KEJ Utility.log(sProperty); GPlAQk :?W {vV *qdf?'R InputStream input = httpConnection.getInputStream(); hd{Vz{;W //logResponseHead(httpConnection); jm9J-%? ]AkHNgW 7xz~%xC. byte[] b = new byte[1024]; 9QE|p int nRead; lCT N
dW+= while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) 2c:H0O
0o { rw_T&>! nStartPos += fileAccessI.write(b,0,nRead); dayp1%d //if(nThreadID == 1) JA0$Fz // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); m| 8%%E}d } Q -;ltJ N5 ITb0Tv DwM4/m Utility.log("Thread " + nThreadID + " is over!"); (}E-+:vFU bDownOver = true; Cx$C+ //nPos = fileAccessI.write (b,0,nRead); {g9?Eio^F^ } {.F``2 catch(Exception e){e.printStackTrace ();} D~ _|`D5WK } `s74g0h } kB_u U !G ]=ar&1}J .C=&`;Vs //打印回应的头信息 c*MSd public void logResponseHead(HttpURLConnection con) "a;z { St/<\Y,wr for(int i=1;;i++) "j|}-a { C {.{>M String header=con.getHeaderFieldKey(i); _|%pe]St if(header!=null) X&qRanOP;z //responseHeaders.put(header,httpConnection.getHeaderField(header)); JmN,:bI Utility.log(header+" : "+con.getHeaderField(header)); sX53(|?* else hCRW0
I break; pl62mp! } T{=.mW^ x } tMGkm8y-A s'%KKC ,Nl]rmI public void splitterStop() Q]X0O10 { 48,Aq*JFw bStop = true; "h.} o DS } ^$3 ~;/| -f?Rr:# B@!a@0,,_ } ]:TX> X! ),`MAevp R<W#.mpo6 /* L'=e /& **FileAccess.java \ZrLh,6f. *//文件访问(定位,写) ~N+lI\K package NetFox; m(JFlO import java.io.*; xo{f"8}^ /_~b~3{u a(CZGIB public class FileAccessI implements Serializable{ #sit8k`GR8 :&$4&\_F //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 zSta!] RandomAccessFile oSavedFile; pNpj, H*4 long nPos; #u+BjuZo 6w{^S~rqo _DfI78`( public FileAccessI() throws IOException 5vIuH+0 { n0:+D
R this("",0); iqf+rBL } $hB;r )f#@`lf[< Y{y #us1 public FileAccessI(String sName,long nPos) throws IOException ^EU&6M2 { =!NYvwg6;o oSavedFile = new RandomAccessFile(sName,"rw"); I%xrDiK97 this.nPos = nPos; A?Jm59{w oSavedFile.seek(nPos); b7fP)nb695 } 'N,3]Soi 2L.UEAt |E@G sw public synchronized int write(byte[] b,int nStart,int nLen) JA7HO| { &|<~J(L; int n = -1; .UbmU^y| try{ b><jhbv oSavedFile.write(b,nStart,nLen); M"F?'zTkJ n = nLen; ?!(/;RU1 } W.p->,N catch(IOException e) @%J?[PG { G\h8j*o
e.printStackTrace (); )>at]mH } lD2>`s5 @Zd+XWFw %_+9y?? return n; `xe[\Z2 } :7Mo0,Bw, 4@#1G*OO k1>%wR } a AYO(;3 (omdmT%D qcke8Q /* q p|T,D% **SiteInfoBean.java ><OdHRh@# */ z2t;!]"'l package NetFox; lj%8(X u `(aU_r= W"Dj+/uS public class SiteInfoBean { $V?zJ:a>L T,(IdVlJ M
"p6xp/ private String sSiteURL; //Site's URL 3hR7 ./ private String sFilePath; //Saved File's Path '.~vN L+
O private String sFileName; //Saved File's Name Ed#%F-1sX private int nSplitter; //Count of Splited Downloading File (d993~|h tZ>>aiI3 DLyHC=%{+h public SiteInfoBean() 6 6x} |7
{//nSplitter的缺省值为5 LYh5f# //default value of nSplitter is 5 4M(w<f\5F this("","","",5); F~a5yW:R=) } ^w2n Pb} &c t,N-| public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) .5L/< { s5|LD'o! sSiteURL= sURL; w ;H sFilePath = sPath; wO}
3i6 sFileName = sName; R2Tvo?xI7 this.nSplitter = nSpiltter; ?-<t-3%hyV "r cPJX <)Kjf/x } \,
n'D BO[Q"g$Kon X_s;j5ur public String getSSiteURL() H#U{i { i40r}?- return sSiteURL; avO+1<`4B } ABhza| DJ}xD&G ^.kas7< public void setSSiteURL(String value) qa^x4xZM { 0x^$q?
\A sSiteURL = value; T<zonx1 } spO?5# o~P8=1t 3}g?d/^E3 public String getSFilePath() k`)LO`)) { M#S8x@U return sFilePath; 3Un/-4uL } F]yclXf(' c'`7p/l. /UyW&]nK public void setSFilePath(String value) w0/W=!_ { 58e{WC sFilePath = value; Zy*}C,Z } f+xGf6V m_rR e\ .e.vh:Sz public String getSFileName() qx0o,oZN! { V<4)'UI?k9 return sFileName; (!X:[Ah*$ } u6r-{[W} xDADJ>u2K m$LZ3=v%8 public void setSFileName(String value) W\~ZmA. { 73}k[e7e sFileName = value; <S$y=>.9 } w5n>hz_5 8QC:ro iT^lk'?{O public int getNSplitter() P#ru-0DD { y_$^Po return nSplitter; L6 _Sc-sU } ;k/0N~ pNiqb+^nz 7KM!\"PM public void setNSplitter(int nCount) ?!~au0 { jHz] nSplitter = nCount; gP1$#KgU } UO:>^,(j } BM&'3K_y gX(QRQ v?LJ_>hw*T /* }_?7k0EZ@ **Utility.java eazP'(rc */ ;4qalxzu package NetFox; ZN4&:9M _cGiuxf
# }f-rWe{gs> public class Utility { IL%&*B r1?LKoJOn
%;W8; public Utility() m9e$ZZG$ { !h4 So4p ^Ws~h\{% 0]HK(,/h } :sA-$*&x sg6cq_\ //线程睡眠 -5>g 0o2 public static void sleep(int nSecond) &H+<uYV { 5~[Fh2+ try{ 7L<oWAq Thread.sleep(nSecond); @~N#)L^ } P2s0H+< catch(Exception e) @K+u+}
R { *v5y]E%aW e.printStackTrace (); a9qZI } g)p[A 4 } =G72`]#- cxv)LOl- //日志 Hd2_Cg FB public static void log(String sMsg) s~63JDy"E { S7SPc System.err.println(sMsg); (6A{6_p } rpXw 8 QB@*/Le ome>Jbdhe public static void log(int sMsg) jS- QTG!= { eBN>|mE4N System.err.println(sMsg); 1bDc ct } ]D]K_`!K } eb8_guZ b~~}(^Bg 2'}2r ~6 /* ypifXO;m7 **TestMethod.java < 1r.p<s */ LaIif_fie^ package NetFox; ){(cRB $ SMy&K[hJ[ LpiLk| 2i public class TestMethod { d)AkA\neWo a*D|$<V QMsnfG public TestMethod() EPg?jKZava { ///xx/weblogic60b2_win.exe +I~?8* try{ D"WkD j"M SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); x-QP+M`Pu //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); qqAsh]Z SiteFileFetch fileFetch = new SiteFileFetch(bean); tO0+~Wm fileFetch.start(); }hf*Jw
} =0-qBodbl catch(Exception e){e.printStackTrace ();} }v!6BU6<Q 0qZ)$YKq g[n8N{s } FPMk& ;K_B,@:' ditzl(L public static void main(String[] args) V:+bq` { 0CR;t`M@ new TestMethod(); ;|%r!!#-t } d"cfSH;h } (M=Br 点击下载更多相关资料
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