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/* /u=aX **SiteFileFetch.java bhYU5I 9 */ )S2iIi;Bq package NetFox; mf}\s]_c import java.io.*; AP0|z import java.net.*; I] jX7.fx "J& (:(: k52QaMKa~A public class SiteFileFetch extends Thread { &3I$8v|!? c}%es=@ 6 Uw;C84! SiteInfoBean siteInfoBean = null; //文件信息Bean _dr*`yXi long[] nStartPos; //开始位置 3za`>bUN long[] nEndPos; //结束位置 E67XPvo1+@ FileSplitterFetch[] fileSplitterFetch; //子线程对象 MKC$;>i long nFileLength; //文件长度 V\AK6U@r^ boolean bFirst = true; //是否第一次取文件 0~]QIdu{AR boolean bStop = false; //停止标志 V9T
4+ File tmpFile; //文件下载的临时信息 N<liS3> DataOutputStream output; //输出到文件的输出流 $@2"{9Z WNa3^K/W{ //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) j;iL&eo> public SiteFileFetch(SiteInfoBean bean) throws IOException UfKkgq# { ra:GzkIw siteInfoBean = bean; :CTL)ad2 //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); MtUY?O.P2 tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); n+?- if(tmpFile.exists ()) c|lU(Tf { #W|!fILL bFirst = false; q`^3ov^</ read_nPos(); WYLX?x } VjB*{, else kwlC[G$j7 { #V[SQ=>x[ nStartPos = new long[bean.getNSplitter()]; | ]# +v@ nEndPos = new long[bean.getNSplitter()]; C_G1P)k } IY)5.E
_ sKd)BA0` vLDi ; hJ[UB } N@()F&e o,FUfO}F G3dhM#! public void run() mgVML&^ { ?E7=:h(@t //获得文件长度 ln#\sA?iG //分割文件 &SmXI5>Bo0 //实例FileSplitterFetch U:n*<l-k} //启动FileSplitterFetch线程 EkZjO Ci //等待子线程返回 K]<u8eF try{ b[srG6{ & if(bFirst) k 4B_W { OQFi.8 nFileLength = getFileSize(); F;kvH if(nFileLength == -1) B{aU;{1 { W-XpJ\_ System.err.println("File Length is not known!"); ffk4mhH } wyw <jH else if(nFileLength == -2) tS<h8g_ { XWtiwf'K System.err.println("File is not access!"); nY0sb8lZJ } hVUIBJ/5(- else WNF9#oN|oT { $XGtS$ for(int i=0;i<nStartPos.length;i++) iBoEZEHjw { s$GF 95^ nStartPos = (long)(i*(nFileLength/nStartPos.length)); yM ,VrUh } <%K UdkzEP for(int i=0;i<nEndPos.length-1;i++) ? )_7U { ^ ulps**e nEndPos = nStartPos[i+1]; K-(;D4/sQE } 7'OPjtM nEndPos[nEndPos.length-1] = nFileLength; H$tb;: } 5v9uHxy } N9]xJgTze 4ht\&2&: uyT/Xzo3 //启动子线程 Rp/-Pv
fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; 2B` 8eb for(int i=0;i<nStartPos.length;i++) \r;F2C0*i { FH*RU1Z fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), ]XUSqai siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), l1<?ONB.# nStartPos,nEndPos,i); GwQn;gkF Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); $]*d#`Sy{% fileSplitterFetch.start(); ~/|zlu*jpc } Mm#[&j[Y // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), gs`> C( siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); [5Y<7DS // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", <&U!N'CE nEndPos = " + nFileLength); (WE,dY+. // fileSplitterFetch[nPos.length-1].start(); }-p,iTm
zu<3^=3 ;'3]{BGcU //等待子线程结束 $Ha%Gr //int count = 0; |Q!4GeQL[ //是否结束while循环 p)/
p!d[T/ boolean breakWhile = false; N E=
w6 0x5xLg;Q o.^y1mH' while(!bStop) A]?^ H< { `o
si"o9 write_nPos(); 8i:[:Z Utility.sleep(500); |+NuYz? breakWhile = true; K"l0w**Og# &p"(- 3hS6jS for(int i=0;i<nStartPos.length;i++) l h/&__ { M<[?g5=# if(!fileSplitterFetch.bDownOver) CgnXr/!L { %MJ;Q?KB breakWhile = false; 8#59iQl break; d+}k g } Y {c5 } <xn;bp[ if(breakWhile) de YyaV break; aws"3O%
uW Z;b+>2oL A}G|Yfn //count++; `|<+ ? //if(count>4) Vk7=7%xW // siteStop(); ~m`!;rE } V8"Wpl9Cz 0YS?=oi O3%[dR System.err.println("文件下载结束!"); s#^pC*,' } k/lFRi-i catch(Exception e){e.printStackTrace ();} I]uhi{\C } np6HUH ]}2Ztr)zZ nY^Nbh0 //获得文件长度 d
4O public long getFileSize() Fu)Th|5GZ { -&Gfh\_NW int nFileLength = -1; hz)9"B\S try{ ^ vbWRG~ URL url = new URL(siteInfoBean.getSSiteURL()); 2F?kjg, HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); n`L,]dco httpConnection.setRequestProperty("User-Agent","NetFox"); h0VzIuV nGrVw& ;nB2o-% int responseCode=httpConnection.getResponseCode(); bPd-D-R if(responseCode>=400) v8@eW.I1 { @Fx@5e processErrorCode(responseCode); FA$zZs10\ return -2; //-2 represent access is error EOVZGZF } k
dU!
kj @]'SeiNp g%\L&}Jd String sHeader; +?d} 7zh HDS"F.l5 \*"`L3 for(int i=1;;i++) xl]
;*& { =B(mIx;m //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); G6O/(8 //Utility.log(in.readLine()); 9L)L|4A.l sHeader=httpConnection.getHeaderFieldKey(i); I/p]DT if(sHeader!=null) ixw(c&gL { $TG?4 if(sHeader.equals("Content-Length")) .JAcPyK^ { F2>%KuM nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); d6.}.*7Whc break; ?R6`qe_F } 0BTLcEqgZ } ,Y!zORv<7 else @ajM^L!O break; OE"<!oIs } ((MLM3zJ } PXEKV0y catch(IOException e){e.printStackTrace ();} xncwYOz catch(Exception e){e.printStackTrace ();} ybvI?# $qm~c[x% FH\CK Utility.log(nFileLength); cY{Nos DO^y;y> =A n`D return nFileLength; NWKi
()nA% } :ba/W&-d C\Ayv)S#2 pm]fQuq //保存下载信息(文件指针位置) @"8R3BN private void write_nPos() ;<-7*}Dj { y/R+$h(% try{ 0.DQO; output = new DataOutputStream(new FileOutputStream(tmpFile)); K]"Kf{bx output.writeInt(nStartPos.length); Tf-CEHWD for(int i=0;i<nStartPos.length;i++) <abKiXA" { -p8e // output.writeLong(nPos); ~A >oO-0K output.writeLong(fileSplitterFetch.nStartPos); )H+kB<n output.writeLong(fileSplitterFetch.nEndPos); dAxp ,):&J } -g~~] K% output.close(); %f!iHo+Z } 7~vqf3ON4J catch(IOException e){e.printStackTrace ();} <lo`q<q catch(Exception e){e.printStackTrace ();} GqUSVQ } )%mAZk-*;^ sh6(z?KP =_QkH!vI //读取保存的下载信息(文件指针位置) i6>R qP!69 private void read_nPos() 7/>a:02 { A&N*F "q try{ n,nisS DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); Yx1 D) int nCount = input.readInt(); RvW.@#EH0 nStartPos = new long[nCount]; aZgNPw nEndPos = new long[nCount]; ?,% TU&Yn for(int i=0;i<nStartPos.length;i++) 0Q1/ n2V { 4}-#mBV]/ nStartPos = input.readLong(); \"d?=uFe nEndPos = input.readLong(); \cZfg%PN } 8p=>?wG input.close(); afm_ Rrg[ } f z%tA39m catch(IOException e){e.printStackTrace ();} KXe
ka catch(Exception e){e.printStackTrace ();} E5{n?e } O5-;I,)H x!?Z*v@I M 9"-WIG@h private void processErrorCode(int nErrorCode) :]c=pH { F<r4CHfh; System.err.println("Error Code : " + nErrorCode); ;r!\-]5$ } 0w3b~RJ ]{Ek[Av xIgql}. //停止文件下载 c]v
+ public void siteStop() :6u~aT/ { kF-TG3 bStop = true; :`J>bHE for(int i=0;i<nStartPos.length;i++) ORH93` fileSplitterFetch.splitterStop(); oT->^4WY ^saM$e^c: Cef7+fa } $l"MXxx5I } vlQ0gsXK //负责部分文件的抓取 x,1=D~L} **FileSplitterFetch.java A&l7d0Z^j5 */ RVP 18ub.S package NetFox; z!CD6W1n -N z}DW> |<Bpv{]P import java.io.*; 7@P656{ import java.net.*; q6&67u0 -eL'KO5' /f&By
p public class FileSplitterFetch extends Thread { k7T
alR ;*QN9T=0 k1iLnza% String sURL; //File URL ('d{t:TsY long nStartPos; //File Snippet Start Position 1S*P"8N}0h long nEndPos; //File Snippet End Position ~4 ^p}{ int nThreadID; //Thread's ID @1.9PR$x boolean bDownOver = false; //Downing is over ]fC7%"nB boolean bStop = false; //Stop identical ][t6VA FileAccessI fileAccessI = null; //File Access interface $8@+j[> W 5I=X]& \`gEu{ public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException mJ$Htyr { CB]l[hM$ this.sURL = sURL; T*\$<- ^ this.nStartPos = nStart; M=+M8M`Iy this.nEndPos = nEnd; A^g>fv
nThreadID = id; hVZo"XUb fileAccessI = new FileAccessI(sName,nStartPos);//定位 JUU&Z[6J } ohplj`X[21 z8tl0gd%D ,'_(DJX public void run() N 8}lt { b,Lw7MY}[ while(nStartPos < nEndPos && !bStop) kW(Kh0x { A'~#9@l< kaO{#i2- C8MWIX} try{ jGiw96,Y URL url = new URL(sURL);
[R\=M' HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); ?cxr%`E httpConnection.setRequestProperty("User-Agent","NetFox"); 7@~QkTH~y String sProperty = "bytes="+nStartPos+"-"; Y^3)!> httpConnection.setRequestProperty("RANGE",sProperty); LP?P=c Utility.log(sProperty); _H2tZ%RM >Bx8IO1_\d %^!aB InputStream input = httpConnection.getInputStream(); H ;wR //logResponseHead(httpConnection); >{F!ntEj b[0S=e
G R8uj3!3^ byte[] b = new byte[1024]; V4\560 int nRead; tQ[]Rc while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop)
G1p'p&x. { Um'Ro 4 nStartPos += fileAccessI.write(b,0,nRead); :iEA UM //if(nThreadID == 1) .FJj // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); raF]
k0{ } QES^^PQe: D&f!( n LUG9 #. Utility.log("Thread " + nThreadID + " is over!"); <
GU bDownOver = true; ^Rk^XQCh //nPos = fileAccessI.write (b,0,nRead); !U[:5@s06 } ;L$,gn5H catch(Exception e){e.printStackTrace ();} e3pnk
=u } }{t3SGs J } TR?Bvy2s:g L,W:,i/C ?#i|>MRR> //打印回应的头信息 v!KJ|c@m public void logResponseHead(HttpURLConnection con) JeL~]F { ;da4\bppt for(int i=1;;i++) py.!%vIOQ { Yu;9&b String header=con.getHeaderFieldKey(i); ~Q0&P!k if(header!=null) [lZ=s[n. //responseHeaders.put(header,httpConnection.getHeaderField(header)); p_;r%o= Utility.log(header+" : "+con.getHeaderField(header)); +dJ&tuL:S else }q]jjs break; k3#wLJ } \D ^7Z97 } =~
'^;D Z"]xdOre JC/d:. public void splitterStop() EFeAr@nj { \UhGGg% bStop = true; R7,pukK } UL[uh@4 z41D^}b AT-0}9z{ } lqauk)(A0 8'n#O>V@ HMhLTl{; /* !@A|L#* **FileAccess.java ps"9;4P *//文件访问(定位,写) Vl-D<M+ih package NetFox; ;tm3B2 import java.io.*; zWJKYF qK Ls(&HOK[p u6f4yQ public class FileAccessI implements Serializable{ v,8Si'"i+ kF#{An)P //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 M *v^N]>"G RandomAccessFile oSavedFile; y _6r/z^ long nPos; BL7>dZOa 'r6 cVBb} 6R L~iD;X public FileAccessI() throws IOException |I(%7K { X"wFQa this("",0); vu44 !c@ } UC.8DaIPN ]bf' 7bHE!#L`0 public FileAccessI(String sName,long nPos) throws IOException =%xIjxYl { ta@ISRK oSavedFile = new RandomAccessFile(sName,"rw"); wQ@Zwbx this.nPos = nPos; &:-GI)[o oSavedFile.seek(nPos); C"(_mW{@ } I.UjST C"k2<IE ~0av3G public synchronized int write(byte[] b,int nStart,int nLen) BF>T*Z-Ki { 1xq3RD int n = -1; av"Dljc try{ F_K oSavedFile.write(b,nStart,nLen); ?U=mcdqd n = nLen; PKl]GegP } MK< catch(IOException e) 6^WiZ^~ { iOKr9%9?Z e.printStackTrace (); fi5YMYd1 } ux%&lff ^*HVP* {`($Q$Q1 return n; QziN] } jQO*oq} hkkF1
h }klE0<W|5\ } 7ZL,p:f ;O Q#@|D ,G/\@x% /* 7YoofI **SiteInfoBean.java 9yO{JgKA */ >hHJ:5y package NetFox; Z83q- SJso'6 g #FrwfJOV public class SiteInfoBean { Tnzco : ;|)/ xC=
y^-
1 private String sSiteURL; //Site's URL F<6KaZ| private String sFilePath; //Saved File's Path EGp~Vo- private String sFileName; //Saved File's Name %i;r]z- private int nSplitter; //Count of Splited Downloading File 9O(i+fM XLkL#&Ir MzBfHt'Rk public SiteInfoBean() h;cB_6vt {//nSplitter的缺省值为5 x@{G(W:W //default value of nSplitter is 5 /vFxVBX this("","","",5); z^gDbXS } [lDt0l5^ d
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+^ public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) :F!dTD$ { 9,Crmbw8 sSiteURL= sURL; .FfwY 'V sFilePath = sPath; D=5t=4^H( sFileName = sName; -s?dzX this.nSplitter = nSpiltter; J4Q)`Y\~ )A>U<n $h bc0)'a\ } mh!N^[=n g:~?U*f- ?~]1Gd public String getSSiteURL() .N-'; %8 { nzQYn return sSiteURL; u8{@PlS } `Yo-5h ?<>,XyY X:xC>4]gG' public void setSSiteURL(String value) D7gX,e { cEh0Vh-] sSiteURL = value; .,d$%lN } H3UX{|[ `JY>v io XNkQk0i;g& public String getSFilePath() Cn6n4, 0 { rw=UK` return sFilePath; q>(I*=7 } 1?e>x91 ~u~[E s= GOB"G public void setSFilePath(String value) V1CSXY\2 { M<M#<kD sFilePath = value; A
.jp<> } \gJapx( Hb@G*L$ 4$q)e<- public String getSFileName() _x,-d|9bd { }]n>A return sFileName; -Fok%iQ'5 } ,
$D&WH `ykMh>*{ C-:SQf public void setSFileName(String value) 1O'* X { *$4A|EA V sFileName = value; k_En_\c?p2 } >H=Q$gI %1 VNP(E >zfZw"mEP public int getNSplitter() [#P`_hx { =?`y(k4a return nSplitter; Nak'g/uP> } DO1N`7@o ^NnU gj nY"rqILX? public void setNSplitter(int nCount) c=jI.=mi3 { ~Hyyq- nSplitter = nCount; vhE}{ED } p0y0T|H^ } m|e*Jc G\,A> mT/P bHWvKv+ /* #BT6bH08X **Utility.java Fy(nu-W */
u_[4n package NetFox; &\6`[# bT }
{gWTp oZ*=7u public class Utility { ffoo^1}1 4MF}FS2) b/n8UxA public Utility() n[MIa]dK { o,''f_tRQ| $jm>tW&; u{{xnyl? } #iqhm,u7D yOn2}Z //线程睡眠 8NF;k5 public static void sleep(int nSecond) ttAVB{kdo { beHCEwh try{ G(|(y=ck Thread.sleep(nSecond); EkB6- nz } `S/1U87 catch(Exception e) eM1;Nl { EB3o8 e.printStackTrace (); ]RrP !|^ } _G}CD|Kx } }r<@o3t \Q?|gfJH //日志 M\.T 0M_ public static void log(String sMsg) [nPzhXs { FOUs=
E[ System.err.println(sMsg); <*(UvOQuX } oN6*WNt J g%q?2Nv Qdx`c^4m public static void log(int sMsg) X5oW[ { X^_+%U System.err.println(sMsg); UN
.[,%<s } 2Fp]S
a } d`],l\oC {+UNjKQC 4pTuP / /* _]~ht H **TestMethod.java 84oW */ o|*| package NetFox; m9<[bEO<$ WJh;p: q[ Ag-?6v public class TestMethod { cmGj0YUQ1 ga1gd~a M?4r 5R public TestMethod() j+B5m:ExfI { ///xx/weblogic60b2_win.exe 6quWO2x try{ [TfV2j* e SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); 6_&6'Vq //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); Q"K >ML>0 SiteFileFetch fileFetch = new SiteFileFetch(bean); [sY1|eX fileFetch.start(); =*>4Gh
i } F6GZZKj catch(Exception e){e.printStackTrace ();} 1PTu3o&3 ~
GT\RAj[ QVRokI`BF } Gv+Tg/ ?VN]0{JSp (#l_YI
- public static void main(String[] args) G$kwc
F'C { NUNn[c new TestMethod(); UE#Ni 5 } aaD$'Y,<>B } JQh s=Xg 点击下载更多相关资料
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