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/* z%cpV{Nu **SiteFileFetch.java X\dPQwasM */ 7Ne`F(c package NetFox; 4?3*%_bDJ, import java.io.*; 2G9sKg,kL import java.net.*; ?h*Ngbj> O%KP,q&}Y &&\HE7* public class SiteFileFetch extends Thread { O=Cz*j 'Lb-+X, ?z]hYsy SiteInfoBean siteInfoBean = null; //文件信息Bean 1aQR9zg% long[] nStartPos; //开始位置 ![OKmy long[] nEndPos; //结束位置 cJ>
#jl& FileSplitterFetch[] fileSplitterFetch; //子线程对象 ;[ag|YU$Y long nFileLength; //文件长度 #'<s/7;~ boolean bFirst = true; //是否第一次取文件 $<[Q8V- boolean bStop = false; //停止标志 9]DMHA@ File tmpFile; //文件下载的临时信息 L-}6}5[ DataOutputStream output; //输出到文件的输出流 x\r[Zp| A_mVe\(*M //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) $aFCe}3b< public SiteFileFetch(SiteInfoBean bean) throws IOException >#Obhs|S{C { \k69 S/O siteInfoBean = bean; +UGWTO\#ha //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); +U:U/c5Z^ tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); NLz[F`I if(tmpFile.exists ()) E>}(r%B { +oT/ v3, bFirst = false;
{"([p L read_nPos(); IJ`%Zh{f } G; *jL4 else !((J-:= { rh6gB]X]3: nStartPos = new long[bean.getNSplitter()]; jM'kY|<g; nEndPos = new long[bean.getNSplitter()]; &H`A S6 } >)&]Ss5J TI9]v( Hlr[x Id/-u[-yo } 0E5"}8 *88Q6=Mm zP8a=Iv public void run() qkEre { !FqJP
OGm //获得文件长度 b85r=tm //分割文件 zB?} {@ //实例FileSplitterFetch p:GB"e9>H //启动FileSplitterFetch线程 LL}|#%4d //等待子线程返回 r}1.=a try{ j<HBzqP%6 if(bFirst) oVK3=m@{ { S{q c1qj nFileLength = getFileSize(); E,/<; if(nFileLength == -1) tLz,t&h { i Sm
.E System.err.println("File Length is not known!"); 8)wxc1 } FKX+
z else if(nFileLength == -2) :?*|D p1 { gyt[ZN_2 System.err.println("File is not access!"); /5l"rni } GbLuXU else 1TagQ { <yw6Om:n< for(int i=0;i<nStartPos.length;i++) xE2sb* { 8K]5fkC| nStartPos = (long)(i*(nFileLength/nStartPos.length)); =nQgS.D } "zn<\z$l for(int i=0;i<nEndPos.length-1;i++) * 7<{Xbsj^ { 0I`)<o- nEndPos = nStartPos[i+1]; su/!<y } .}wVM`81z nEndPos[nEndPos.length-1] = nFileLength; q,8TOn } 2+2Gl7" s } bI_6';hq! DxFmsjX[L S^Lu RF]F //启动子线程 rW8.bMmM fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; *Va ;ra(V2 for(int i=0;i<nStartPos.length;i++) =Ts3O0"[ { Hz*5ZIw fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), .9cQq/{b siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), x?aNK$A~X nStartPos,nEndPos,i); ~6)A/]6 Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); Mx3MNX/ fileSplitterFetch.start(); 7O=N78M } GV+K]
KDI // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), -|"[S"e siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); TQ/EH~Sz // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", m>H+noc^ nEndPos = " + nFileLength);
?)_?YLi // fileSplitterFetch[nPos.length-1].start(); fbG+.' g[NmVY-o 8zMt&5jD //等待子线程结束 +PlA#DZu //int count = 0;
$:7T //是否结束while循环 e;*GbXd| boolean breakWhile = false; ,v#F6xv8 X\-IAv [{i"Au] while(!bStop) 1&,d,< { {CO]wqEj write_nPos(); -kGwbV} Utility.sleep(500); n0ZrgTVJ breakWhile = true; H8'q Y rwJCVkF lR[]A for(int i=0;i<nStartPos.length;i++) K~C6dy
{ P1r)n{; if(!fileSplitterFetch.bDownOver) vky@L! &, { u%o]r9xl' breakWhile = false; d;4LHQ0yU break; 3>~W_c9@ } am'11a@* } TbUouoc if(breakWhile) xF#'+Y break; H n^)Xw
!T'`L{Sj ag_RKlM3 //count++; &}:]uC //if(count>4) ;*H@E(g // siteStop(); KWq&<X5 } ;ewqGDe'3 I)JqaM K+s@.D9J System.err.println("文件下载结束!"); M_OvIU(E } cbton<r~ catch(Exception e){e.printStackTrace ();} D('
w<9. } i40'U?eG~6 +nz6+{li\ R7nT,7k. //获得文件长度 1?oX" public long getFileSize() `X:o]t@ { } xy>uT int nFileLength = -1; FQ3{~05T try{ |[ )e5Xhd URL url = new URL(siteInfoBean.getSSiteURL()); b-`=^ny)K HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); sa7F-XM httpConnection.setRequestProperty("User-Agent","NetFox"); 2`[iTBZ=^ c SV`?[a 7 K5D,"D;1 int responseCode=httpConnection.getResponseCode(); Fx3CY W if(responseCode>=400) e#5LBSP { _K4E6c_ processErrorCode(responseCode); 7xhBdi[ dQ return -2; //-2 represent access is error yMd<<:Ap } o#^(mGj_. Bh#?:h&f KkIgyLM String sHeader; 6XFLWN-) 9i=HZ\s3 6w"_sK?
for(int i=1;;i++) xa=Lu?t%< { a7?)x])e //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); x @a3STKT //Utility.log(in.readLine()); J[k,S(Y sHeader=httpConnection.getHeaderFieldKey(i); G0izZWc if(sHeader!=null) PX} ~ { nB &[R if(sHeader.equals("Content-Length")) _ddOsg|U { a(eKb2 CX nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); vOIzfwYG9 break; -K@mjN } lB(E:{6OZ } <73dXTZ0 else @mJ#~@*( break; e2dg{n$6" } f i_'Ny># } r=J+ catch(IOException e){e.printStackTrace ();} R/O>^s!Co catch(Exception e){e.printStackTrace ();} u alpm#GU ;h-W&i7 7~ I*u6zY Utility.log(nFileLength); t/k MV6 }Z,x F` 0p31C7! return nFileLength; z{q|HO } >x3$Ld `xq/<U;i Fs3rsig //保存下载信息(文件指针位置) I&Z4?K private void write_nPos() Rt9S { -Gyj]v5y`c try{ Cd7imj output = new DataOutputStream(new FileOutputStream(tmpFile)); YjR`}rdwo output.writeInt(nStartPos.length); {tDH !sX for(int i=0;i<nStartPos.length;i++) \Qgc7ev { M}S1Zz%Ii1 // output.writeLong(nPos); om1@;u8u output.writeLong(fileSplitterFetch.nStartPos); %FhUjHm output.writeLong(fileSplitterFetch.nEndPos); WSKubn?7B } @CUYl*.PD output.close(); zgnZ72% } z|k0${iu# catch(IOException e){e.printStackTrace ();} qj#C8Tc7 catch(Exception e){e.printStackTrace ();} z*w.A=r } _X6@.sM/2 AhCqQ.O71 >* )fmfY //读取保存的下载信息(文件指针位置) ^aONuG9 private void read_nPos() }ZKG-~ { ? koIZ try{ k0(_0o DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); N+9W2n int nCount = input.readInt(); ?s-Z3{k nStartPos = new long[nCount]; \+T U{vr nEndPos = new long[nCount]; _pN:p7l( for(int i=0;i<nStartPos.length;i++) n([9U0!gu { )s~szmJoVD nStartPos = input.readLong(); /n3Qcht nEndPos = input.readLong(); E |K|AdL } A0l-H/l7 input.close(); a`*Dq"9pV } Aw)I:d7F catch(IOException e){e.printStackTrace ();} '~\\:37+ catch(Exception e){e.printStackTrace ();} &*YFK/ ] } ,vh$G 7D np6R\Q!& Q{:=z6& private void processErrorCode(int nErrorCode) U(rY,4' { 6g-Q System.err.println("Error Code : " + nErrorCode); (~
`?_ } Jmml2?V-c qGXY 8 t5o&8v //停止文件下载 -FGM>~x public void siteStop() $l=& { C)?tf[!_6 bStop = true; g@ 2f&m for(int i=0;i<nStartPos.length;i++) M->BV9 fileSplitterFetch.splitterStop(); @9e}kiW ak"W/"2: U0ZPY )7k } !Pc&Sg } }`uFLBG3 //负责部分文件的抓取 fWz=bJ"V **FileSplitterFetch.java eq6>C7.$ */ i1 >oRT{Z
package NetFox; m|]:oT`M kQw%Wpuq[/ V~
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b2$ import java.io.*; NyR,@n1 import java.net.*; H{et2J<H B(1WI_}~ |*%i]@V= public class FileSplitterFetch extends Thread { + usB$=kJ bamQ]>0|>! _zK
~9/5 String sURL; //File URL P\ia ?9 long nStartPos; //File Snippet Start Position ]RxJ^'a63 long nEndPos; //File Snippet End Position ?ocBRla int nThreadID; //Thread's ID r]=Z : boolean bDownOver = false; //Downing is over =oT4!OUf boolean bStop = false; //Stop identical qx1+' FileAccessI fileAccessI = null; //File Access interface ^e{]WH? N#p%^GH CxD=8X9m public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException fl}!V4 { ZKTY1JW_ this.sURL = sURL; 8.zYa(<2 this.nStartPos = nStart; :ggXVwpe this.nEndPos = nEnd; .(%]RSBY nThreadID = id; | r,{# EE fileAccessI = new FileAccessI(sName,nStartPos);//定位 y!VL`xV } PS3jCT BIXbdo5F O<P(UT" public void run() VVw5)O1' { bk|?>yd while(nStartPos < nEndPos && !bStop) !<vy!pXg { 0WSOA[R%[b L _Xbca= A=+1PgL66 try{ iyv5\ URL url = new URL(sURL); Jbn^G7vH<6 HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); &Lbh?C httpConnection.setRequestProperty("User-Agent","NetFox"); #H]c/ String sProperty = "bytes="+nStartPos+"-"; 8/<+p? 3p> httpConnection.setRequestProperty("RANGE",sProperty); `Jj q5:\& Utility.log(sProperty); i<{:J -U| Q%:Z&lgy 4YgO1}%G InputStream input = httpConnection.getInputStream(); ~wQ M
?h //logResponseHead(httpConnection); 'Ll'8 ps ~7wLnB wlFK#iK byte[] b = new byte[1024]; :;jRAjq" int nRead; kjF4c6v while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) }t*:EgfI { 3Mq%3jX nStartPos += fileAccessI.write(b,0,nRead); 'iU+mRLp //if(nThreadID == 1) -_M': // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); ^fj30gw7\5 } A_Y5{6@ Oe21noL #sE:xIR Utility.log("Thread " + nThreadID + " is over!"); #y
f bDownOver = true; T m2+/qO, //nPos = fileAccessI.write (b,0,nRead); *z^Au7,& }
s&iu+> catch(Exception e){e.printStackTrace ();} SmUiH9qNd, } QYEGiT } ?-'GbOr! <m,bP
c :R =\M6s //打印回应的头信息 n?QglN public void logResponseHead(HttpURLConnection con) $ I
J^ { deEc;IAo for(int i=1;;i++) b!qlucAeE { 6OR) 97 String header=con.getHeaderFieldKey(i);
akG|ic-~ if(header!=null) n}C0gt- //responseHeaders.put(header,httpConnection.getHeaderField(header));
i (`Q{l Utility.log(header+" : "+con.getHeaderField(header)); IEe;ygL# else 'vV+Wu#[ break; JkQ\r$Y. } n5y0$S/D } y+
4#Iy K j~!E
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Uac public void splitterStop() >DAi-`e { ]GDjR'[z bStop = true; s@p:XO } {I/t3.R` Rm}G4Pq [Wxf,rW i } U#%+FLX@w r::0\{{r"p I%{ 1K+V/ /* LfJMSscfv **FileAccess.java S0ReT*I *//文件访问(定位,写) eH~T PH package NetFox; rP#&WSLVj import java.io.*; hcz!f `O!yt ]TN/n%\ public class FileAccessI implements Serializable{ `~D{]'j cUO$IR)yL //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 \}AJ)v*< RandomAccessFile oSavedFile; $wbIe"| long nPos; y,K> Wb9e gYloY=.Z$' >3}N; public FileAccessI() throws IOException /]of@
{ ^a$L9p( this("",0); 8tO.o\)h } !$#5E1:\ >>cL"m n] t3d public FileAccessI(String sName,long nPos) throws IOException )$K\:w> { v3(0Mu0J oSavedFile = new RandomAccessFile(sName,"rw"); ZiRCiQ/? this.nPos = nPos; k"6v& O oSavedFile.seek(nPos); |E;+j\ } \YHl( +|H,N7a< GiKhdy public synchronized int write(byte[] b,int nStart,int nLen) ""m/?TZq' { 0<##8m@F8 int n = -1; 'Er\68 try{ wh!8\9{g oSavedFile.write(b,nStart,nLen); ZZ/k7(8 n = nLen; cC]]H&'Hg+ } i(*fv(z catch(IOException e) 9Q1w$t~Y { N,.awA{ e.printStackTrace (); EKS?3z%! } -J0OtrZ B5+$VQ 9i
D&y)$" return n; D&pp
< } sXtt$HID= "'XYW\bI {1+meE } m}]QP\ MHGaf`7ro m-#]v}0A /* #V$sb1u **SiteInfoBean.java VV sE]7P ] */ Lhrlz,1 package NetFox; t^}"8 \FF|b"E_= *1T~ruNqa public class SiteInfoBean { V;Q@'<w Wys$#pJ #4!f/dWJp private String sSiteURL; //Site's URL l<'}` private String sFilePath; //Saved File's Path foB&H;A4oC private String sFileName; //Saved File's Name m)]|mYjju private int nSplitter; //Count of Splited Downloading File )@] W= Pn L?zae [z6P]eC7 public SiteInfoBean() :Zo^Uc:*w {//nSplitter的缺省值为5 eu?P6>urA //default value of nSplitter is 5 Y![8-L|Q this("","","",5); q^7=/d8 } B*P;*re y<#Hq1 ;F"Tu public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) GaV OMT { .y0u"@iF sSiteURL= sURL; Yv2L0bUo: sFilePath = sPath; (cI@#x sFileName = sName; wM#l`I this.nSplitter = nSpiltter; 3>=G-AH/$K SpOSUpl% %e_){28 n } +;Gvp=hk e@&2q{Gi= QUg<~q)Oq public String getSSiteURL() Hl*#iUq { lTFo#p_( return sSiteURL; "{d[V(lE" } [4@@b"H \jS^+Xf?^ f#hmMa public void setSSiteURL(String value) s?fEorG
{ +ZV?yR2yn sSiteURL = value; uC6e2py<[ } 2z1r|?l Ik@MIxLK 1F+nWc2 b public String getSFilePath() ju4wU;Nu { {UF|-VaG return sFilePath; RB;2 } 75A60Uw pK'D(t 23opaX5V= public void setSFilePath(String value) @V@<j)3P { 6;Mv)|FJF sFilePath = value; 3E>]6 } [|YJg]i- H>"P]Y)oX ! \5)!B public String getSFileName() 'b+
Tio { `8TL*.9 return sFileName; E~8J<gE } `_"?$ v2F C\|HN=2eh 2d<`dQY{l3 public void setSFileName(String value) Xob(4 { D2io3Lo$ov sFileName = value; 1KJ[&jS ] } G {a;s-OA3 Yi19VU|/ GB>T3l" public int getNSplitter() akwS;|SZ { "IWL& cH3 return nSplitter; w"A>mEex< } "c![s% 9Z3Vf[n5\ W=2]!%3# public void setNSplitter(int nCount) ;)sC{ "Jb { 5 L-6@@/ nSplitter = nCount; zCu+Oi6 } eEeK ]8@ } 6U]r 3
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J_j7 /* tcI Z
2H% **Utility.java +Lo,* */ uiWo<}t}{ package NetFox; I#W J";kqB VY0-18 o s##XC^;p[ public class Utility { T'N/A9{q gpCWXz')i g=Nde2d? public Utility() ;3Q3!+%j { P+ 0-h cQ0+kX< Tcq@Q$H } SWNT}{x] _G%kEt_4 //线程睡眠 ZZ>(o
d!B public static void sleep(int nSecond) u#3Cst8Y { vQ{mEaH try{ )xTu|V Thread.sleep(nSecond); 5L\Im^ } |lVi* 4za% catch(Exception e) vnX~OVz2 { 8=mx5Gwz- e.printStackTrace (); $- GwNG } [Fr <tKtB } >E>'9@Uh qi8~bQ{rH //日志 f^[m~ public static void log(String sMsg) {65_k { YO;@Tj2)x System.err.println(sMsg); Qr~yHFc1y } ^K^rl9 A.<M*[{q >a: 6umY public static void log(int sMsg) z~;@Mo"*f { Ul|htB<1: System.err.println(sMsg); K!gocNOf } t5S!j2E } KU_""T
_,*QJ #?bOAWAwLh /* 2*zMLI0. **TestMethod.java nB%[\LtZ? */ }]j#C package NetFox; IZxr;\dq6
U@)WTH6d 7#9fcfL public class TestMethod { ~8[`(/hj }`uq:y RNX>I,2sh public TestMethod() CbT ;#0 { ///xx/weblogic60b2_win.exe wd
Di5-A4 try{ 2c5)pIVEy SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); &lB>G[t //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); + )7h)uq SiteFileFetch fileFetch = new SiteFileFetch(bean); x|3G}[= fileFetch.start(); <ceJ!"L } t;lK=m| catch(Exception e){e.printStackTrace ();} 4n2*2
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x| public static void main(String[] args) p1,.f&(f { z-`4DlJUS new TestMethod(); 8|rlP } /ASpAl[J } A*? Qm 点击下载更多相关资料
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