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/* qFVZhBC **SiteFileFetch.java ,wf_o%'eW */ >QDyG8* package NetFox; Ztk%uc8_lM import java.io.*; 23|JgKuA import java.net.*; L1_O!EQ 5H'Iul<Os ,b^Y8_ltoT public class SiteFileFetch extends Thread { HRTNIx ^5Y<evjm =nHkFi@D=t SiteInfoBean siteInfoBean = null; //文件信息Bean h~QQ- long[] nStartPos; //开始位置 -8)C6"V{ long[] nEndPos; //结束位置 #0)TS FileSplitterFetch[] fileSplitterFetch; //子线程对象 6l,6k~Z9 long nFileLength; //文件长度 O0y0'P-rJq boolean bFirst = true; //是否第一次取文件 75>%!mhM boolean bStop = false; //停止标志 ju:}%' File tmpFile; //文件下载的临时信息
/1TK+E$ DataOutputStream output; //输出到文件的输出流 Dj= {% )4o8SF7lz //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) |`yU \ public SiteFileFetch(SiteInfoBean bean) throws IOException _I)TO_L; { b73}|4v siteInfoBean = bean; q'fOlq //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); RJ'za1@z;b tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); "r`2V-E if(tmpFile.exists ()) ?Kmz urG { NI/'SMj% bFirst = false; @Y,t] read_nPos(); Q?hf2iw } %#fjtbeB else aQH]hLvs { A|Ft:_Y nStartPos = new long[bean.getNSplitter()]; nls$
wE nEndPos = new long[bean.getNSplitter()]; *QNX?8Fm_ } l`75BR `C7pM
wBlE!Pm t.&JPTK-H } 4iSN.nxIZ EqHToD I3 Vh01y f public void run() W rT_7 { nzO-\`40 //获得文件长度 Mg0ai6KD //分割文件 -^np"Jk //实例FileSplitterFetch Rxw+`ru //启动FileSplitterFetch线程 )EYs+7/t //等待子线程返回 Y q/vym-O5 try{ Gqq<-drR if(bFirst) %/)z!}{ { N)jNvzm nFileLength = getFileSize(); 'xEomo# if(nFileLength == -1) ']Czn._ { m[l&&(+J, System.err.println("File Length is not known!"); ao7M([ff } '?90e4x3/ else if(nFileLength == -2) y)fz\wk { )(d~A?~ System.err.println("File is not access!"); N f?\O@ } 2/ )~$0 else {y|.y~vW { f% 8n?f3;u for(int i=0;i<nStartPos.length;i++) .$f0!`
t { 8\)4waz$ nStartPos = (long)(i*(nFileLength/nStartPos.length)); 3Zz_wr6 } dr8Q>(ZY for(int i=0;i<nEndPos.length-1;i++) %U<lS.i { 7u1o>a%9 nEndPos = nStartPos[i+1]; hQ)?LPUB } g}?39?o4 nEndPos[nEndPos.length-1] = nFileLength; 8eCh5*_$ } amQiH!}8R } H>\lE2 SA"4|#3>7 ,LOx! //启动子线程 "T8b.ng fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; daB5E<? for(int i=0;i<nStartPos.length;i++) eMOp}.zt| { _4{3^QZq5
fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), i*xVD`x ~ siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), C9Cl$yZ nStartPos,nEndPos,i); x wfdJ(& Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); >0 := <RW fileSplitterFetch.start(); |+-b#Sa9 } Nog{w // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), 3nq4Y' siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1);
3"HEXJMc // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", Sw{rNzh%$ nEndPos = " + nFileLength); C:!&g~{cKi // fileSplitterFetch[nPos.length-1].start(); X#W6;?Z\ B|>eKI uYE"OUNWL //等待子线程结束 QVb{+`.7 //int count = 0; ju.`c->k" //是否结束while循环 x {Rj2~KC boolean breakWhile = false; ? _[q{i{ *P12d r-hb]!t while(!bStop) eH;{Ln { 6m9\0)R write_nPos(); ![[:Z Utility.sleep(500); #E/|WT breakWhile = true; !4"$O@U4 f1\mE~#} <?rdhx for(int i=0;i<nStartPos.length;i++) P!R`b9_U { ) C#>@W if(!fileSplitterFetch.bDownOver) o~x49%X<c { b\SB breakWhile = false; BE!WCDg, break; fo;^Jg. } $3Sm? } SG)|4$" if(breakWhile) VkC1\L6 break; aO
*][;0 O2~Q(q' qwuA[QkPi //count++; wemhP8!gc //if(count>4) wA";N=i= // siteStop(); 2 o5u02x } Uot LJa _BND{MsX uF@DJX}> System.err.println("文件下载结束!"); 9'O@8KB_ } za5E{<0 catch(Exception e){e.printStackTrace ();} E`q)vk } /6'5uP
\lpvRZ\L&g X<:Zx#J?i //获得文件长度 JF9r[% public long getFileSize() U5;Y o+z { 2()/l9.O' int nFileLength = -1; ov Wm}!r try{ $btk48a 7 URL url = new URL(siteInfoBean.getSSiteURL()); Hy2~D:34 HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); $*+`;PG- httpConnection.setRequestProperty("User-Agent","NetFox"); ^%RIz!} Nf9$q| %! i)MJP * int responseCode=httpConnection.getResponseCode(); o=Kd9I# if(responseCode>=400) i=`@)E { (p? B= processErrorCode(responseCode); aB~=WWLR\ return -2; //-2 represent access is error 4^K<RSYs } 7HQ|3rt a_Z[@W l7S&s&W @ String sHeader; u[LsH z?g\w6 ?[hkh8| for(int i=1;;i++) 6z1>(Za7> { xY`$j'u //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); O.'\GM //Utility.log(in.readLine()); f5vsxP)Y[ sHeader=httpConnection.getHeaderFieldKey(i); 7HEUmKb" if(sHeader!=null) F'JceU { |BE`ASW; if(sHeader.equals("Content-Length")) 5H/D~hr& { =.6JvX<d1* nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); $w
,^q+ break;
W[oQp2 = } <iznB8@ } Aw7_diK^ else oGqbk x break; njBK { } 5c6?$v/ } W4S! rU catch(IOException e){e.printStackTrace ();} hD>cxo catch(Exception e){e.printStackTrace ();} @SH$QUM( =
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#6G&)M Utility.log(nFileLength); rI;tMNs hBNA,e: pcO0xrI return nFileLength; nY 50dFA, } 4Y4QR[>IU3 x10u?@ [BKX$A:Y //保存下载信息(文件指针位置) q;=! =aRg private void write_nPos() DjveMs$d { \LQ54^eB try{ NaYr$` output = new DataOutputStream(new FileOutputStream(tmpFile)); )CUB7D)= output.writeInt(nStartPos.length); fHR^?\VVp for(int i=0;i<nStartPos.length;i++) #^eXnhj 9 { %g{<EuK]p // output.writeLong(nPos); [vyi_0[ output.writeLong(fileSplitterFetch.nStartPos); XmX{e.<NZ output.writeLong(fileSplitterFetch.nEndPos); SH/^qDT' } 5.zv0tJku output.close(); ,K~r':ht } LV!<vakCK catch(IOException e){e.printStackTrace ();} Mib<1ZM catch(Exception e){e.printStackTrace ();} eeu;A,@U } &BS*C} }, Y>Tok|PV xJ|_R,>.H //读取保存的下载信息(文件指针位置) :|PgGhW private void read_nPos() BoHpfx1C { F<LRo}j"9Q try{ %e%VHHO| DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); B4 +A int nCount = input.readInt(); V"DilV$v nStartPos = new long[nCount]; fsz:A"0H nEndPos = new long[nCount]; |.Vs(0O for(int i=0;i<nStartPos.length;i++) { bD:OF { Auk#pO# nStartPos = input.readLong(); vG'I|OWg nEndPos = input.readLong(); 5VhJ*^R`y } mo input.close(); -wrVhCd~g] } mq6TwM catch(IOException e){e.printStackTrace ();} vj hh4$k catch(Exception e){e.printStackTrace ();} l#cG#- } d_aHUmI^" 9L9qLF5 t Z|6,*XEc private void processErrorCode(int nErrorCode) G%5ZG$as { ['jr+gIfQ System.err.println("Error Code : " + nErrorCode); ~x6<A\ } b>x03% crl"Ec z6x`O-\ //停止文件下载 ;\(X;kQi public void siteStop() Q7 @oAeNd { S\R5SRE bStop = true; @M&qH[tK-A for(int i=0;i<nStartPos.length;i++) 2 pmqP-pKd fileSplitterFetch.splitterStop(); 4c9a"v PB?92py& WO!'(" } v$~$_K } t+Au6/Dx? //负责部分文件的抓取 rBUWzpE" **FileSplitterFetch.java )];Bo.QA */ E_-QGE/1 package NetFox; $(+#$F<eo+ IaT\ymm` ?4cj"i import java.io.*; -OXC;y import java.net.*; {@ Z=b5/P N~~
sM"n E{BX $R_8 public class FileSplitterFetch extends Thread { ?Sr7c|a2 W^YaC
(I ]\m>N]P] String sURL; //File URL yS1i$[JV long nStartPos; //File Snippet Start Position X.+|o@G long nEndPos; //File Snippet End Position / }Pj^^6A< int nThreadID; //Thread's ID y;<F|zIm boolean bDownOver = false; //Downing is over E<sd\~~A: boolean bStop = false; //Stop identical l1vI FileAccessI fileAccessI = null; //File Access interface N;gY5;0m i
?PgYk&} M;9s public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException Z rv:uEl { spT$}F2n this.sURL = sURL; ==AmL]* this.nStartPos = nStart; }#h`1 uV this.nEndPos = nEnd; yw1-4*$c nThreadID = id; Cy dV$!&mP fileAccessI = new FileAccessI(sName,nStartPos);//定位 IG&twJR } {mUt|m7! M+*K-zt0 ![9$ru public void run() {2 k]$| { +kN,OK~ while(nStartPos < nEndPos && !bStop) 'xLXj> { uS5G(} [ E0AbVa. X;n09 L`CB try{ Fw:_O2 URL url = new URL(sURL); -^3uQa<zN^ HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); @C%6Wo4l3 httpConnection.setRequestProperty("User-Agent","NetFox"); %JgdLnQE String sProperty = "bytes="+nStartPos+"-"; ;;6$d{ httpConnection.setRequestProperty("RANGE",sProperty); /_qHF- Utility.log(sProperty); udXzsY9Ng C]Y%dQh+a e+V8I&% InputStream input = httpConnection.getInputStream(); =3ovaP //logResponseHead(httpConnection); 33; '6/ =X9fn ZZ L@UO>: byte[] b = new byte[1024]; <<b]v I int nRead; E]v?:!!ds while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) ?GlXxx=eV { #^BttI nStartPos += fileAccessI.write(b,0,nRead); TB-dV'w //if(nThreadID == 1) KY}H- // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); 0'
oXA'L-J } bYoBJ
#UX F-$!e?,H !FD d5CS Utility.log("Thread " + nThreadID + " is over!"); Z~<=I }@ bDownOver = true; ?J,,RK. //nPos = fileAccessI.write (b,0,nRead); F{.\i *$ } TMo DN%{ catch(Exception e){e.printStackTrace ();} )ki
Gk}2 } 3H0B+F2XQ } ^/6P~iK' K8Q3~bMf w$Fg0JS //打印回应的头信息 {
0-on"o public void logResponseHead(HttpURLConnection con) -Lu&bVt<> { m"'}{3$% for(int i=1;;i++) +*Z'oC BJ, { !^ad{#|X String header=con.getHeaderFieldKey(i); -7]j[{?w if(header!=null) SZyORN //responseHeaders.put(header,httpConnection.getHeaderField(header)); PZ`11#bbm Utility.log(header+" : "+con.getHeaderField(header)); $dXx@6fP else yCA8/)>Gm break; ~\8(+qIv%f } r~2hTie } BjagG/sX k|\M(Z*(P [`oVMR public void splitterStop() ]ly" K!1, { pu+Q3NfR bStop = true; f*B-aj# } ~D>pu%F oda, %T\hL\L? } &b`W<PAc?4 PCHspe9!y M:{Aq&. /* Ei):\,Nv **FileAccess.java &e@)yVLL *//文件访问(定位,写) * 70ZAo4 package NetFox; {x.0Yh7 import java.io.*; ^a_a%ws IlB8~{p_ y/c3x*l.xL public class FileAccessI implements Serializable{ J
(?qk jT=|!,Pn //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 R-j*fO} RandomAccessFile oSavedFile; Wz s=BNm9 long nPos; |[IyqWG9 No} U[u.O z&tC5]# public FileAccessI() throws IOException n)98NSVDbT { T" W<l4i- this("",0); SXZ9+<\ } L;%w{,Ji y'`/^>. MCmb/.&wu public FileAccessI(String sName,long nPos) throws IOException B(++*#T!^m { \agZD+ oSavedFile = new RandomAccessFile(sName,"rw"); 'v~'NWfd this.nPos = nPos; rBNVI;JZW oSavedFile.seek(nPos); `.@sux!lu } 5tQz!M [jzsB:;XB& n jWe^ public synchronized int write(byte[] b,int nStart,int nLen) kFWwz^x { >ep<W<b int n = -1; eKvr1m- - try{ oT):#,s oSavedFile.write(b,nStart,nLen); 5'I+%66?h$ n = nLen; iVI& } su1lv# catch(IOException e) );7
d_# { B#Ybdp ; e.printStackTrace (); oQ<[`.s } D4!;*2t FOsd{Fw
dZ`Y>wH_ return n; P_1WJ } %Hbq3U30 Qh1pX}X #T_!-;(Z } 0\tac/ 2{rWAPHgz {5E8eQ /* @-!P1]V| **SiteInfoBean.java Yub}AuU`v */ #c^]p/ package NetFox; iWf+wC| f=F:Af! cmG27\c RO public class SiteInfoBean { Xxg|01 NZvgkci_(u [`\VgKeu private String sSiteURL; //Site's URL )[Tm[o?Y. private String sFilePath; //Saved File's Path Y\]ZIvTSb private String sFileName; //Saved File's Name |IcW7( private int nSplitter; //Count of Splited Downloading File nHdQe */;7Uv7 =GX5T(P8k public SiteInfoBean() 6dIPgie3w {//nSplitter的缺省值为5 *-nO,K>y` //default value of nSplitter is 5 5^g* this("","","",5); gZ,h95' } %;'~TtW5 loVg{N: 'Cc~|gOgD public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) $gUlM+sK { 8_('[89m sSiteURL= sURL; v76Gwu$d sFilePath = sPath; q5(t2nNb sFileName = sName; &>JP.//spi this.nSplitter = nSpiltter; QRQZ{m lmeTW0U@9( [Yt{h9 } Z}+}X| E!9WZY r].n=455[ public String getSSiteURL() FCEy1^u { .4+Rac return sSiteURL; q?}C`5%D } }=-0DSLVj keAoJeG,J f% pT-# public void setSSiteURL(String value) 6.D|\;9{c { Jl{ 0q7b sSiteURL = value; _Si=Jp][ } S^rf^% !D??Y^6bI V`I4"}M1 public String getSFilePath() /$c87\
{ VQ9A/DH/ return sFilePath; dQ`Tt- n } +RooU?Aq U^dfNi@q B>53+GyMV public void setSFilePath(String value) m+(Cl#+ { uM2@&)u sFilePath = value; %O\@rws } v;]rFc#Px[ ;U* /\+*h f^F;`;z public String getSFileName() 981-[ga`Y { |:eTo<
return sFileName; 5XKTb } , PlH| `_\KN_-%Vu ( /]'e} public void setSFileName(String value) FIq'W:q: { FLi'}C sFileName = value; nfEbu4| } U{2xgNJ 9!( 8o qf? "v; public int getNSplitter() Bj@>iw?g' { Sm'Tz&! return nSplitter; p'jc=bL E } X-["{ Q %o@s3~O $k~TVm
Yex public void setNSplitter(int nCount) J K/{IkF { ]oGd,v X nSplitter = nCount; rW?WdEg } <[dcIw<7 } xM jn=\} Ta?J;&<u]/ NEq_!!/sF /* (:l6R9'= **Utility.java 3TwjC:Yhv2 */ eRMN=qP.q package NetFox; 6 >kU Lp !rnjmc CS[]T9|_ public class Utility { Q|_F
P: ;.}L#'0j JxVGzb`8 public Utility() Ju+3} { :60vbO }_+XN"}C qDdO-fPev } MLDzWZ~}ef NW\CEJV //线程睡眠 ,.)wCZ,wca public static void sleep(int nSecond) X$kLBG[o_ { Pe%[d[k try{ Olzw)WjG Thread.sleep(nSecond); <pX?x3-' } $ f:uBhM catch(Exception e) T@W:@,34 { _pdKcE\X e.printStackTrace (); _U~R } 7@c!4hmrU } XM]m%I rNN>tpZ} //日志 T<]{:\*n public static void log(String sMsg) ?mH=3
:~ { 2!%)_< System.err.println(sMsg); pBqf+}g4 } DGFSD Py[ J*B-*6O44 VEWW[T public static void log(int sMsg) ?m)<kY { kQ+y9@=/g System.err.println(sMsg); h"[B zX } }3z3GU8Q- } G$C2?|V)=
u$?! ?_ H9>/:. /* 8\{!*?9! **TestMethod.java DAw1S$dM */ *;Kp"j package NetFox; p3P8@M - (s0f Xqf\}p n public class TestMethod { JA^!i98{ SQ)BS/8A "%T~d[M public TestMethod() hj];a,Br& { ///xx/weblogic60b2_win.exe "kApGNB try{ G2`YZ\ SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); ;0eVE //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); 5AT^puL]] SiteFileFetch fileFetch = new SiteFileFetch(bean); QFnuu-82" fileFetch.start(); qT?{}I } !Yc:yF catch(Exception e){e.printStackTrace ();} {t;o^pUF M7BpOmK' Y1cL dQn } .vHHw@ 5 3pW:` :>!-[hfQ public static void main(String[] args) L;:|bVH { %Z6Q/+#fn new TestMethod(); 'bbw0aB4 } ]*NYuEgc } 8R)K$J$Hm 点击下载更多相关资料
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