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/* (,j~s{ **SiteFileFetch.java wu;^fL */ FwpTQix! package NetFox; q71V]! import java.io.*; m0,TH[HWGF import java.net.*; ~(-df> mum4Uj p7p6~;P public class SiteFileFetch extends Thread { u):Nq<X FfM,~s<Efz v@1f,d SiteInfoBean siteInfoBean = null; //文件信息Bean vVFT0_ long[] nStartPos; //开始位置 ;XI=Y"h{% long[] nEndPos; //结束位置 "3$P<Q\;l; FileSplitterFetch[] fileSplitterFetch; //子线程对象 S^7u`- long nFileLength; //文件长度 THcX.%ToT boolean bFirst = true; //是否第一次取文件 B42qiV2/k boolean bStop = false; //停止标志 P0l.sVqL File tmpFile; //文件下载的临时信息 *EF`s~ DataOutputStream output; //输出到文件的输出流 4Jk[X>I~ ja%IGaH;s //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) 2Xqa?ay0> public SiteFileFetch(SiteInfoBean bean) throws IOException jMP;$w { RwoAZ]Zg] siteInfoBean = bean; m/"}Y]n! //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); LrhQG tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); >@.:9}Z if(tmpFile.exists ()) W0LJXp-v { |5(un/-C bFirst = false; )P#xny2 read_nPos(); xsRu~'f } Y.#:l< else Z"d21D~h9` { a/gr1 nStartPos = new long[bean.getNSplitter()]; la_FZ nEndPos = new long[bean.getNSplitter()]; X8 x:/]/0 } E.4 X, >8EmfjUoc ;BW-ag \9 8.tp#x,A } L[. )!c8k p sAr>:\3 _YA;Nd#%k public void run() wT&P].5n { K{`3,U2Wx //获得文件长度 <xwaFZ //分割文件 "64D.c(r$ //实例FileSplitterFetch q j*77 //启动FileSplitterFetch线程 <(x!P=NM- //等待子线程返回 nzl3<Ar try{ :Y[?@/m4 if(bFirst) xX\A&9m { w!/|aZ~* nFileLength = getFileSize(); x-HR [{C if(nFileLength == -1) %!V =noo { g*$yUt System.err.println("File Length is not known!"); RsnFjfb' } r^ +n06[
else if(nFileLength == -2) wyUfmk_} { AxiCpAS;J System.err.println("File is not access!"); ^03M~SNCj } DX<xkS[P else ;s w3MRJ { 7s2e>6Q[ for(int i=0;i<nStartPos.length;i++) ZnRE:= { ke5_lr( nStartPos = (long)(i*(nFileLength/nStartPos.length)); WbHI>tt } 4FcY NJq for(int i=0;i<nEndPos.length-1;i++) Yp6%
@c6\ { 2-DJ3OL]k nEndPos = nStartPos[i+1]; %s#`Z [8, } .!Q?TSQ+{! nEndPos[nEndPos.length-1] = nFileLength; 4/QQX;w } -3Auo0 } 4 moVS1 Wf9K+my FS6I?q#tQ //启动子线程 |&\cr\T\r fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; l1D"*J 2` for(int i=0;i<nStartPos.length;i++) =>Dw,+" { h 7*#;j fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), F1b~S;lm siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), Ku;8Mx{ nStartPos,nEndPos,i); 'Q4V(. Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); Y[`%j\= fileSplitterFetch.start(); m^Rf6O^ } j WerX -$ // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), SkMBdkS9z[ siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); IjrjLp[z$ // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", V>B*_J,z. nEndPos = " + nFileLength); #brV{dHV, // fileSplitterFetch[nPos.length-1].start(); |3uE"\nfA o,DI7sb Jk=d5B //等待子线程结束 nISfRXU; //int count = 0; )jaNFJ
3 //是否结束while循环 O<`\9 boolean breakWhile = false; 82~ZPZG OojQG
D(^ |'1 while(!bStop) ~e R6[; { 5wGc"JHm write_nPos(); ^*+-0b;[G Utility.sleep(500); .="[In' breakWhile = true; h&6t.2<e U\`H0' O{44GB3 for(int i=0;i<nStartPos.length;i++) q
NE(@at { 2a[_^v $v if(!fileSplitterFetch.bDownOver) 2:D1<z6RQ { b}5hqIy breakWhile = false; *XSHzoT* break; bhc
.UmH } ]2'{W]m } 'X1fb:8m8 if(breakWhile) `B7 1 ` break; cb9q0sdf Q.`O;D}x 09C[B+>h //count++; 4f{(Scg //if(count>4) ]Qb85;0) // siteStop(); } l4d/I } _9Y7.5 d&[.=M\E8 Ex3V[v+D( System.err.println("文件下载结束!"); @&E{
L } *Zi:^<hv catch(Exception e){e.printStackTrace ();}
C#x9RW } ,T3_*:0hk! LG3:V'| F3V_rE< //获得文件长度 Ah<6m5+ public long getFileSize() }Qo:;&"3 { Dt p\T|) int nFileLength = -1; iPoDesp try{ _'47yq^O URL url = new URL(siteInfoBean.getSSiteURL()); ^GN |}W HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); pX/,s#dY> httpConnection.setRequestProperty("User-Agent","NetFox"); X1{U''$
K cWG?`6xU& STH?X]
/ int responseCode=httpConnection.getResponseCode(); qX?k]m if(responseCode>=400) nkvkHh { rlIDym9nY~ processErrorCode(responseCode); {=GWQn6cc return -2; //-2 represent access is error fb||q-E } %T:7I[f -H;p +XAY ]$gBX= String sHeader; @(_M\>!%M fooQqWC) Q-LDFnOFwp for(int i=1;;i++) .|g67PH= { A(>kp=~ //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); V`MV_zA2 //Utility.log(in.readLine()); 9e:}qO5) sHeader=httpConnection.getHeaderFieldKey(i); zHsWj^m" if(sHeader!=null) Q #%C)7) { @hE$x-TP0 if(sHeader.equals("Content-Length")) HX]pcX^K { h#iFp9N nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); ZT;:Hxv0N break; 0Zv<]xO } ;\5^yDv[e } &\0V*5tI else [rt+KA break; M)oJ06`K } 8+7=yN( } fm%1vM$[J catch(IOException e){e.printStackTrace ();} H _%yh,L catch(Exception e){e.printStackTrace ();} VD*xhuy$k M!ra3Y ix=H=U]Q{ Utility.log(nFileLength); (YJ]}J^ P_f>a?OL: 5wws8w return nFileLength; #n_uELE }
`xpU u*NU MT2 ^Q\O8f[u //保存下载信息(文件指针位置) yb(zyGe private void write_nPos() ages-Z_X { oqOXRUy try{ -gP4| r8& output = new DataOutputStream(new FileOutputStream(tmpFile)); mfNYN4Um6 output.writeInt(nStartPos.length); (y xrK for(int i=0;i<nStartPos.length;i++) mf>cv2+ { >
CPJp!u // output.writeLong(nPos); L8FLHT+R- output.writeLong(fileSplitterFetch.nStartPos); gTp){ output.writeLong(fileSplitterFetch.nEndPos); _\P9~w
` } }m~2[5q%/ output.close(); p<@0b } O!(FNv0 catch(IOException e){e.printStackTrace ();} mj{/' catch(Exception e){e.printStackTrace ();} fJ?$Z| } y ~
A] f;(]P AF
qut //读取保存的下载信息(文件指针位置) >qSaF private void read_nPos() 8\~IwtSk { r"MKkSEM try{ G([!(8&2Y DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); kOfu7Zj int nCount = input.readInt(); xCd9b:jG nStartPos = new long[nCount]; Ij_VO{]G'l nEndPos = new long[nCount]; VS#i>nlT for(int i=0;i<nStartPos.length;i++) @42!\1YT { dpBG)Xzoyv nStartPos = input.readLong(); 4K@`>Y5g* nEndPos = input.readLong(); Z81{v<c; } J@{yWgLg input.close(); $cLtAo^W } Xja l6e)[ catch(IOException e){e.printStackTrace ();} aeESS;JxJj catch(Exception e){e.printStackTrace ();} >o\[?QvP } |xTf:@hgHf l/BE~gdl U~SOHfZ%( private void processErrorCode(int nErrorCode) =%:mZ@x' { 5O9Oi:-!c System.err.println("Error Code : " + nErrorCode); _J51:pi } c{Ax{-'R L7jMpz& kMS[ //停止文件下载 "-N)TIzLX public void siteStop() z^/aJ@gQ { >Hr0ScmN@" bStop = true; -4p^wNR for(int i=0;i<nStartPos.length;i++) 1u\fLAXn fileSplitterFetch.splitterStop(); |4i,Vkfhe $V"~\h8 89B1\ff } A#mf*]' } R {r0dK"_ //负责部分文件的抓取 2'"$Y' **FileSplitterFetch.java 4"e7 43( */ y?-wjJS> package NetFox; JF >mybB
##7, K5Fzmo a import java.io.*; '|e5 cW6z import java.net.*; m7 !Fb
;APpgt4 46'EZ@#s public class FileSplitterFetch extends Thread { lqOv_q %}G:R!4 d DTdL|x.{ String sURL; //File URL _Y*:
l7 long nStartPos; //File Snippet Start Position cI3uH1;# long nEndPos; //File Snippet End Position )gNHD?4x int nThreadID; //Thread's ID V#W(c_g boolean bDownOver = false; //Downing is over |WeLmy%9 boolean bStop = false; //Stop identical r4O*0Q_ FileAccessI fileAccessI = null; //File Access interface ?-O(EY1E ^/HE_keY uU`zbh}]L. public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException (tEW#l'} { S8" h9| this.sURL = sURL; EX8:B.z`57 this.nStartPos = nStart; ushQWP) this.nEndPos = nEnd; t=~5I> nThreadID = id; Nuk\8C fileAccessI = new FileAccessI(sName,nStartPos);//定位 FuaGr0] } ]?U:8% J$PE7*NU muQ7sJ9
r public void run() ;w?zmj<Dm { =5_8f while(nStartPos < nEndPos && !bStop) 7/(C1II.Q { ?x]T&S{ <;x+?j dL")E|\\k try{ K:P gkc URL url = new URL(sURL); bTKzwNx HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); MQ"<r,o?: httpConnection.setRequestProperty("User-Agent","NetFox"); cGC&O%`i,\ String sProperty = "bytes="+nStartPos+"-"; A20_a;V httpConnection.setRequestProperty("RANGE",sProperty); J?5O2n Utility.log(sProperty); _'Q}Y nEv :$[m[y7i SsafRK$ InputStream input = httpConnection.getInputStream(); PG)dIec //logResponseHead(httpConnection); =#1iio&
d OqwF
iO G\TyXq_4 byte[] b = new byte[1024]; 8Md*9E#J(" int nRead; wmY6&^?uS while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) 0_Etm83Wq6 { dW!T.S nStartPos += fileAccessI.write(b,0,nRead); e&F,z=XJ} //if(nThreadID == 1) bM8b3,}?n // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); @8@cpm } 1kl4X3q6 g9I2SdaJ s BF>a| Utility.log("Thread " + nThreadID + " is over!"); bQ0m=BzF bDownOver = true; \rADwZm //nPos = fileAccessI.write (b,0,nRead); ~z>2`^Z" } 05nG| catch(Exception e){e.printStackTrace ();} ?
_[gs/i} } rM pb } )0PUK9 50rq}- uxVXnQQ //打印回应的头信息 yXrFH@3 public void logResponseHead(HttpURLConnection con) Lc*i[J<s { ^']xkS for(int i=1;;i++) rtf>\j+ { `EU=u_N String header=con.getHeaderFieldKey(i); suPQlU>2sj if(header!=null) Z\i@Qa +r //responseHeaders.put(header,httpConnection.getHeaderField(header)); 0?SdAF[:z Utility.log(header+" : "+con.getHeaderField(header)); ctdV4%^{ else SLz^Wg._ break; *8js{G0h } 9+=U&* } sP5PYNspA R$(,~~MH &^qD<eZ!Eq public void splitterStop() #)=P/N1 { lGjmw"/C bStop = true; Hc^b}A y7 } lh~!cOm\=E T
-C2V$1 T\8|Q@ } ,+,""t 49_b)K.tB z{``v|K /* 6!Ji-'\" **FileAccess.java ;2)@NH *//文件访问(定位,写) t1g)Y|@d package NetFox; A(Ugam~} import java.io.*; 69r<Z N}VKH5U| D19uI&U4 public class FileAccessI implements Serializable{ #=7~.Y WZ@nuK.39T //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 #\@*C= RandomAccessFile oSavedFile; E;D9S long nPos; e][U ; IR(JBB|xNQ GJ
ZT~ public FileAccessI() throws IOException QF'N8Kla { [P)HVFy|l this("",0); (tx6U.Oy } id&; [)#,~L3 J'b*^K public FileAccessI(String sName,long nPos) throws IOException CdatN$/* { &'c1"%*%8> oSavedFile = new RandomAccessFile(sName,"rw"); >UZfi u this.nPos = nPos; m}Kn!21 oSavedFile.seek(nPos); 5RI"gf } !95ZK.UT 5R/k -h^` ~WehG<p v[ public synchronized int write(byte[] b,int nStart,int nLen) 5Ee%!Pk { \@GA;~x.b int n = -1; :=T+sT~ try{ ,>`wz^z oSavedFile.write(b,nStart,nLen); 29 Yg>R!/ n = nLen; ^yu0Veypy } p_)V@7 catch(IOException e) +VI2i~ { vv"_u=H e.printStackTrace (); #l+U(zH:JG } ,g6w2y7 ] /b@8#px GO+cCNMa" return n; K82pWpR } )(_}60 V[5-A $ft +0;6.PK } U<KvKg AWi~qzTZ \=XAl >}\ /* t(/e~w **SiteInfoBean.java +I;b,p */ :hwZz2Dhi package NetFox; ] 06LNE jL6u#0 Siq2Glg_ public class SiteInfoBean { iLws;3UX;x S c_*L<$ @F+4
NL-'P private String sSiteURL; //Site's URL a:XVu0`( private String sFilePath; //Saved File's Path tUDOL-Tv private String sFileName; //Saved File's Name Og Y4J|< private int nSplitter; //Count of Splited Downloading File m3+MRy5 fOdkzD, $[by) public SiteInfoBean() B=jJ+R {//nSplitter的缺省值为5 0;#%KC, //default value of nSplitter is 5 SirjWYap this("","","",5); kBS;SDl) } S>/p6}3] M-e!F+d{od ^}8(o public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) .a8N 5{` { J3Qv|w[3Y sSiteURL= sURL; F@& R"- sFilePath = sPath; p&>*bF, sFileName = sName; \A6MVMF8 this.nSplitter = nSpiltter; q?nXhUD \j+O |#`|) [V|,O'X ~ } E!8FZv8 _[<R<&jG >8"oO[U5> public String getSSiteURL() /XeDN-{ { 0k@4;BY u return sSiteURL; &BY%<h0c } ryB^$Kh,, eB%KXPhMm AE={P*g public void setSSiteURL(String value) %g5TU 6WP { 9TIyY`2! sSiteURL = value; h3Nwxj~E } ms{:=L2$$ Kyt.[" p 1XSA3;ZEc public String getSFilePath() &=Gz[1
L { jrbEJ. return sFilePath; W2D^%;mw } CC0@RU AON";&dLq- HgvgO\`] public void setSFilePath(String value) 0&mo1 k_U { @zL)R b%P$ sFilePath = value; !
@{rkp } 1P.
W 34 ^VK-[Sz& :9Zu&t public String getSFileName() :3^b>(W. { 11glFe return sFileName; %<lfe<;^t } (%}T\~`1z# >@KQ )p' ` CoDu|M% public void setSFileName(String value) <W~5;m { Q&]
}`Rp= sFileName = value; H%t/-'U? } bW(+Aw=O ,d(F|5M: 8/,m8UOY public int getNSplitter() uSLO"\zysX { dIQ7u return nSplitter; XKp.]c wP } "u~l+aW0 Tf7$PSupP
gcqcY public void setNSplitter(int nCount) a*REx_gLG { ]W7(}~m nSplitter = nCount; a/;u:" } Y]/(R"-2G } v_)a=I%o&2 IMIZ#/ +-&N<U /* ,DK |jf **Utility.java ;ZHKTOoK */ )8kcOBG^L package NetFox; 5!$m3j_,]? O{ zY(`[ C7[ge& public class Utility { jCDZ$W89 MH[Zw$ C9E l {f public Utility() )A:2y + { %y)5:] et(/` -}`ES] } rUEoz |e4a ^"7tfo8 //线程睡眠 TU&6\]yF_ public static void sleep(int nSecond) S8*VjG?T\ { ("0@_05OH try{ dya]^L}fL Thread.sleep(nSecond); T=35? } 9w'3d@ catch(Exception e) 06"p^# { !<H[h4g e.printStackTrace (); !`q*{Ojx } EF=.L{ } ZZOBMF7 v+U(
#" //日志 Ev* b public static void log(String sMsg) ^29w@* { i/9QOw~ System.err.println(sMsg); )W95)] } Q];gC{I MzT#1~ \?c0XD public static void log(int sMsg) ^8$CpAK]M { ]y3V^W# System.err.println(sMsg); RmxgCe(2a } pW7vY)hj } K&0op 4& [RCUP. Gc>bli<- /* ez=$ ]cln **TestMethod.java [?x9NQ{ */ WLW'. package NetFox; s|Ls @iK=1\-2 0h-holUf}~ public class TestMethod { biG=4?Xl Tl5K'3 sY+U$BYB> public TestMethod() Kdh(vNB> { ///xx/weblogic60b2_win.exe TJ[C,ic=D try{ Y,RED5]t SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); *cxmQ //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); 9 +"D8J7 SiteFileFetch fileFetch = new SiteFileFetch(bean); QW#]i fileFetch.start(); r`XIn#o } \s?OvqI: catch(Exception e){e.printStackTrace ();} V2sWcV? !Rk1q&U5 y
,isK } `l@[8H%aw "r @RDw
r/1:!Vu( public static void main(String[] args) gS4zX>rqe { A`<#}~A new TestMethod(); PxzeN6f } (RG\U[ } 95Bw;U3E 点击下载更多相关资料
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