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/* QM~~b=P,\ **SiteFileFetch.java ExFz@6@ */ 4T~wnTH0Xg package NetFox; SoFl]^l import java.io.*; [CAFh:o import java.net.*; xNRMI!yv
`O%O[ 3".#nN public class SiteFileFetch extends Thread { .rX,*|1x ,sg\K>H= [4yw? U SiteInfoBean siteInfoBean = null; //文件信息Bean P*ZMbAf. long[] nStartPos; //开始位置 =L?2[a$2; long[] nEndPos; //结束位置 ^oE#;aS FileSplitterFetch[] fileSplitterFetch; //子线程对象 u2[L^]| long nFileLength; //文件长度 d+
[2Sm(7 boolean bFirst = true; //是否第一次取文件 ZC^NhgX boolean bStop = false; //停止标志 PH^Gjm File tmpFile; //文件下载的临时信息 (bB"6
#TI DataOutputStream output; //输出到文件的输出流 e)XnS ' iG=Di)O //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) }{&;\^i public SiteFileFetch(SiteInfoBean bean) throws IOException CHCT
e { [;~"ctf{ siteInfoBean = bean; nuA
0%K //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); F]0
qt$GO tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); o?IrDQ2gmh if(tmpFile.exists ()) Czy}~;_Ay { yGV>22vv
M bFirst = false; ]9W7]$ read_nPos(); 5e?<x>e } tCwB7c- else 7y.iXe!P { ao|n<*} nStartPos = new long[bean.getNSplitter()]; e3[Q6d&| nEndPos = new long[bean.getNSplitter()]; {/,AMJ<:G] } _~F
0i? O{U j `'pAiu a#9pN?~ } p|BoEITL #]gmM AYp~;@ public void run() q_9 tbZ; { W u$yB! //获得文件长度 DhsvN&yNM //分割文件 )ac!@slb^7 //实例FileSplitterFetch +NiCt S //启动FileSplitterFetch线程 /f AAQ7 //等待子线程返回 K(WKx7Kky^ try{ vF[ 4kDHk if(bFirst) hp2$[p6O { h b8L[ 4 nFileLength = getFileSize(); y3PrLBTz if(nFileLength == -1) {9^p3Q+:P { ,^DP System.err.println("File Length is not known!"); B^ddi } A<( DYd1H else if(nFileLength == -2) Ea-U+7JC { Qam48XZ > System.err.println("File is not access!"); H4sc7- } +!$`0v else }WBHuVcZG { q1ZZ T"' for(int i=0;i<nStartPos.length;i++) ojA !!Ru { Ap4.c8f?Q- nStartPos = (long)(i*(nFileLength/nStartPos.length)); $~%h4 } 4x#tUzb; for(int i=0;i<nEndPos.length-1;i++) lXzm) { 33&\E- Q> nEndPos = nStartPos[i+1]; _c5*9')-) } 4:/^ .: nEndPos[nEndPos.length-1] = nFileLength; - leYR`P } ]e+&Pxw]e } XGjFb4Tw7 {OOn7= $ \o)-3 //启动子线程 -8<vW e fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; h ^s8LE3 for(int i=0;i<nStartPos.length;i++) JO90TP
$ { I`i"*z fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), t*u#4I1 siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), }Gy M<!: nStartPos,nEndPos,i); XP?)xDr8 Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); vJV/3-yX fileSplitterFetch.start(); #3'M>SaoH } vbZ!NO!H // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), S2nX{= siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); c&
bms)Jwa // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", 5}Xi`'g, nEndPos = " + nFileLength); NSH4 @x // fileSplitterFetch[nPos.length-1].start(); ~-B+7 1MT,A_L f*9O39&| //等待子线程结束 7q5*grm //int count = 0; =2ED
w_5E //是否结束while循环 g2=PZR$ boolean breakWhile = false; y~VI,82* $em'H,*b3 )S/=5Uc while(!bStop) z0 #2?o { ,CuWQ'H write_nPos(); qPN9Put Utility.sleep(500); )feZ&G] breakWhile = true; n=AcN Kpa$1x D!.1R!(Z for(int i=0;i<nStartPos.length;i++) w*;"@2y;eY { `u PLyS. if(!fileSplitterFetch.bDownOver) 6]kBG?m0 { Kr `/sWZ breakWhile = false; ecR)8^1 ' break; ]^>:)q } 6 . )Xeb" } 3eXIo= if(breakWhile) vLyazVj.. break; B&0W P5OF CyW|k
Dz QG2 Zh9R //count++; D|Wlq~IpQ //if(count>4) D}j`T // siteStop(); cC+2%q B } `|nCnT' Pd(_ tMp!MQ
System.err.println("文件下载结束!"); {*[(j^OE } { I\og catch(Exception e){e.printStackTrace ();} G -+!h4p } slUi)@b -B&(&R gZ7R^]
k //获得文件长度 /F(n%8)Yq public long getFileSize() W I MBwmg { bv b\G int nFileLength = -1; z ynu0X try{ AX<f$%iqD URL url = new URL(siteInfoBean.getSSiteURL()); Y0A(-" HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); ;FRUB@: httpConnection.setRequestProperty("User-Agent","NetFox"); uLWu. Vx .kn2M&P>= a#;;0R $ int responseCode=httpConnection.getResponseCode(); #jW=K&; if(responseCode>=400) TjYHoL5 { &} `a"tYr processErrorCode(responseCode); =!xX{o?64 return -2; //-2 represent access is error q CYu@Ho } wWiYxBeN PPIO<K 3` $?bD55 String sHeader; L\E>5G; ]+W){W=ai O=(F46 M for(int i=1;;i++) EwA* { F P|cA^$< //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); *4}NLUVX //Utility.log(in.readLine()); VJ&<6 sHeader=httpConnection.getHeaderFieldKey(i); ,m5i(WL if(sHeader!=null) p\lR1 { }$'_%, if(sHeader.equals("Content-Length")) E5M/XW\E6 { !]82$ nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); |D"L!+J-$ break; dS4z Oz" } )H{1Xjh- } tHZ"o!(S else ^MF 2Q+ break; L\:m)g,F. } ce}A!v } }6/M5zF3 catch(IOException e){e.printStackTrace ();} H>+])~# catch(Exception e){e.printStackTrace ();} /pPH D] PQ[?zNrSV X )tH23 Utility.log(nFileLength); h72/03! V3q`V/\ hRu}P" return nFileLength; cK u[4D{ } k'#3fz\ iC=>wrqY> MyllL@kP //保存下载信息(文件指针位置) 0#!}s&j/ private void write_nPos() @:GqOTN { x]x 3iFD try{ L'?aoRj output = new DataOutputStream(new FileOutputStream(tmpFile)); M-Efe_VRQc output.writeInt(nStartPos.length); L%is"NZh for(int i=0;i<nStartPos.length;i++) d$3md<lIB { >{tn2Fkg> // output.writeLong(nPos); 6{=U=
* output.writeLong(fileSplitterFetch.nStartPos); sIgTSdk output.writeLong(fileSplitterFetch.nEndPos); ]B=*p0~j^n } aq}hlA(w output.close(); EOXkMr }
<KU0K catch(IOException e){e.printStackTrace ();} hQm=9gS catch(Exception e){e.printStackTrace ();} Sl,DZ! } ocZ}RI#Q o?>0WSLlm ]$r]GVeN}H //读取保存的下载信息(文件指针位置) #xGP|:m private void read_nPos() j;]I
-M[ { vHcl7=)Q try{ 6dr'nP DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); l_Lz9k int nCount = input.readInt(); Y$v #>w_M nStartPos = new long[nCount]; G&{yM2:E nEndPos = new long[nCount]; p7;K] AW for(int i=0;i<nStartPos.length;i++) {\`ttc> { D!,5j_,j% nStartPos = input.readLong(); >j hcSvM6 nEndPos = input.readLong(); mnK<5KLg1 } JR.)CzC input.close(); xOj#%; } v.Bwg7R3 catch(IOException e){e.printStackTrace ();} C?gqX0[ q catch(Exception e){e.printStackTrace ();} HJ7A/XW } rCDt9o> ]?@ [Ny=0 Y:TfD{Xgc private void processErrorCode(int nErrorCode) QjY}$ { =f!A o:Uc System.err.println("Error Code : " + nErrorCode); RxYENG]/6 } %QEBY>|lI >ceC8"}J5M C`i#7zsH //停止文件下载 =|1_6.tz public void siteStop() KqntOo}
y) { n~ad#iN bStop = true; q&-mbWBj for(int i=0;i<nStartPos.length;i++) 6)uBUM;i fileSplitterFetch.splitterStop(); 5tbCx!tL +a.2\Qt2A *mp:#' } $5 mGYF] } Tty'ysH //负责部分文件的抓取 yO)xN=o^\ **FileSplitterFetch.java )
~=pt&+ */ B1 }-
package NetFox; \{ EVRRXn @iuX~QA[9 :k1?I'q% import java.io.*; azv173XZ import java.net.*; )v_Wn[Y.H &SbdX Q/]~`S public class FileSplitterFetch extends Thread { cmXbkM piM4grg
\ $TXiWW+ String sURL; //File URL S}JOS}\^j long nStartPos; //File Snippet Start Position l}L81t7f long nEndPos; //File Snippet End Position Pq [_(Nt int nThreadID; //Thread's ID DfAF-Yhut boolean bDownOver = false; //Downing is over 2.%)OC!q&5 boolean bStop = false; //Stop identical (1D1;J4g FileAccessI fileAccessI = null; //File Access interface zb9G&'7 D2&d",%&f JyE-c}I public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException CjpGo}a/ { #G]IEO$M6 this.sURL = sURL; GbQi3% this.nStartPos = nStart; !lNyoX/ this.nEndPos = nEnd; ;
oa+Z:;f nThreadID = id; vEg%ivj3 fileAccessI = new FileAccessI(sName,nStartPos);//定位 Ak@!F6~ } zJw5+
+
C`;igg$t_ 0(-4"u>? public void run() BN79\rt
{ )^o.H~Pv while(nStartPos < nEndPos && !bStop) ?m *e$!M0 { NuR7pjNMZ eWAD;x?. `qs,V try{ I+kAy;2 URL url = new URL(sURL); S~aWun HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); {OPEW`F httpConnection.setRequestProperty("User-Agent","NetFox"); B3ItZojAuw String sProperty = "bytes="+nStartPos+"-"; PSq?8. httpConnection.setRequestProperty("RANGE",sProperty); Vt}QPNt Utility.log(sProperty); p}!i_P ASbIc"S6 ]`$yY5 &W0 InputStream input = httpConnection.getInputStream(); h s',f //logResponseHead(httpConnection); vz4(
k/ B.G6vx4yp s>6h]H byte[] b = new byte[1024]; HN5661;8 int nRead; uluAqDz` while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) pCIS82L { @)h>vg nStartPos += fileAccessI.write(b,0,nRead); Yg.[R]
UC //if(nThreadID == 1) $4g{4-) // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); o^2MfFS } Yt#;
+*d5 F0_w9"3E~ x[{\Aw>$. Utility.log("Thread " + nThreadID + " is over!"); V _~lME bDownOver = true; &q<k0_5Q //nPos = fileAccessI.write (b,0,nRead); Nksm&{=6S } -b^dK)wR~ catch(Exception e){e.printStackTrace ();} >}
2C,8N } e}?Q&Lci } bfA>kn0C [Kc ?<3W j<kW+Iio //打印回应的头信息 Am*IC?@tq public void logResponseHead(HttpURLConnection con) B%\&Q@X { _\\Al v. for(int i=1;;i++) ]\^O(BzB { {BJ>x:2 String header=con.getHeaderFieldKey(i); ]YI9 if(header!=null) eX#.Zt] //responseHeaders.put(header,httpConnection.getHeaderField(header)); &qg6^& Utility.log(header+" : "+con.getHeaderField(header)); yx|iZhK0:} else y-E'Y=j break; .@)vJtH) } L/rf5||@ } P{A})t7 M584dMM 5{b;wLi$X2 public void splitterStop() O;RBK&P { *S*49Hq7c bStop = true; zk{d*gN } "e"#k}z9 bss2<mqlH 2|bt"y-5r } kfnh1|D=aY X?t;uZI^ $(D>v!dp /* 0~U%csPHt **FileAccess.java eaf-_#qb *//文件访问(定位,写) ]#G s6CsT| package NetFox; eAW)|=2 import java.io.*; oVK:A;3T| a,oTU\m
C FcM)v"bF&] public class FileAccessI implements Serializable{ K^<?LXJF H[.)&7M\ //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节
cV6H!\ RandomAccessFile oSavedFile; b, a7XANsh long nPos; 129\H<
m U3&GRY|## }iKjef#J public FileAccessI() throws IOException >niv>+!N { A2gFY} this("",0); j?u1\<m } _3%$E.Q ;7s^slVzF HFP'b=?`]| public FileAccessI(String sName,long nPos) throws IOException [j/|)cj { 7_ oUuNw oSavedFile = new RandomAccessFile(sName,"rw"); wuXQa
wo this.nPos = nPos; H8w[{'Mei
oSavedFile.seek(nPos); @H`jDaB9 } sPQjB[ S~:uOm2t\ c"tlNf? public synchronized int write(byte[] b,int nStart,int nLen) yQ/O[( { dUa>XkPa\2 int n = -1; /g>-s&w try{ y%vAEQ2j= oSavedFile.write(b,nStart,nLen); q`p0ul,n n = nLen; Zo2+{a } }i^M<A O catch(IOException e) *~P| ? D' { ~OX\R"aZBW e.printStackTrace (); <J%Z?3@T } #EUT"^:d 3\RD%[} ,X3D<wl return n; 3A^AEO } kkZ}&OXS; L@O>;zp; +PE-j| D } BC!) g+8 C _he=SV =SmU;t>t/ /* S}rEQGGR{ **SiteInfoBean.java 1y:fH4V */ s/@uGC0> package NetFox; pBe1: dCM&Yf}K MD$W;rk(Hn public class SiteInfoBean { mRAt5a#is k(RKAFjY ;R0LJApey private String sSiteURL; //Site's URL B ZU@W%E private String sFilePath; //Saved File's Path +)yoQRekX private String sFileName; //Saved File's Name [nHN@p| private int nSplitter; //Count of Splited Downloading File vmNo~clt\ %Y0lMNP 7Ku&Q<mi public SiteInfoBean() 1v:Ql\^cT {//nSplitter的缺省值为5 rPy,PQG2w //default value of nSplitter is 5 6t7FklM% this("","","",5); j.6!T'$| } c[2ikI,n[ G HQ~{ %?n=In(F public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) %|+aI? { _YlyS )#@ sSiteURL= sURL; K?,?.!ev sFilePath = sPath; EG^
rh; sFileName = sName; #f(tzPD this.nSplitter = nSpiltter; ;/V])4= FWeUZI+
kVZs: } 3c#^@Bj(-e H.iCYD_= >A@yF? public String getSSiteURL() 8Ckd.HKpQ { +a,#BSt return sSiteURL; dpE^BW v3 } h{"SV*Xpk/ 82 |^o "Ia.$,k9 public void setSSiteURL(String value) J#H,QYnf(L { yz0#0YG7 sSiteURL = value; 5-0&`, } 8fi'" OU` !c[O I-8I/RRkmP public String getSFilePath() #*9 |\ { 'wFhfZB1!B return sFilePath; Xk!{UxQKQ } 0x5\{f <WWZb\"{ OH`zeI,[* public void setSFilePath(String value) VFawASwQ { FT>>XP8 sFilePath = value; !W,LG$=/ } -wH0g^Ed R#Yj%$E1 61QA<Wb public String getSFileName() A#']e 8 { ,)U%6=o#} return sFileName; eQyc< } SN")u ^& *;]S` \c{sG\ > public void setSFileName(String value) oH4zW5 { \H>Psv{ sFileName = value; MV3K'<Y } kz}Bc
F )$1j"mV s+_8U}R public int getNSplitter() J*K=tA { qYVeFSS return nSplitter; euV!U}Xr } 5`&@3
m9/ 4`o0?_.' vq9O|E3 public void setNSplitter(int nCount) IDpLf*vSG { `K@N\VM nSplitter = nCount; lxZ9y } {4SaSv^/ } z^*g2J, }+S~Ah?( *!%n`BR ' /* sRBfLN2C **Utility.java :{S@KsPqE */ .K-d package NetFox; 7Q'u>o 1NZpd'$c EJz!#f~ public class Utility { .
WJ Q~Nq5[ R$IsP,Uw public Utility() e\aW~zs 2 { ;B2kot7 rFt+Y}) ro?.w } S{F\_'% [V8^}s}tF //线程睡眠 ^; U}HAY public static void sleep(int nSecond) )#4(4
@R h { v5 p`=Z@% try{ (p'/a.bn Thread.sleep(nSecond);
HC/a } wZCboQ, catch(Exception e) Fsq)co { Jb9@U/<\ e.printStackTrace (); ~ [/jk !G } h7.jWJTo } ;){ZM,Ox ]fh(b)8_, //日志 I5[@C<b public static void log(String sMsg) +7lr#AvU/ { c>c4IQ&d System.err.println(sMsg); txMC^-J2l } E.N>,N s)3CosU 2|1CGHj\ public static void log(int sMsg) `B8`<3k/( { <jFov`^ System.err.println(sMsg); ZF#lh] } .*595SuF } \%}]wf} 1W0[|Hf2v* ;*nzb!u\\ /* #@V<{/;49 **TestMethod.java .2rpQa/h */ ;sUvY* Bcm package NetFox; cw0@Z0 #jxPh!%9 is%ef public class TestMethod { 6_rgRo& JX>`N5s $%&OaAg public TestMethod()
{pre|r\ { ///xx/weblogic60b2_win.exe (B@\Dw8^ try{ MR@Qn[RdM SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); 0[uOKFgE //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); 8WQc8 SiteFileFetch fileFetch = new SiteFileFetch(bean); pfl^GgP# fileFetch.start(); XfIsf9 } #{k+^7aQ catch(Exception e){e.printStackTrace ();} 8OS^3JS3" _\@zq*E ,N_V(Cx5pt } 5[*8CY z~2;u5S& S;#7B?j public static void main(String[] args) !-SI &qy { J5f}-W@ new TestMethod(); Kxh WZ3 } vkYiO]y } g^=Ruh+ 点击下载更多相关资料
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