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/* ZQ@Ul **SiteFileFetch.java p;nRxi7' */ B h<DqN package NetFox; _m0B6?KJ import java.io.*; \3K%> import java.net.*; *z?Vy<u G P|U9f6^3 Xg<R+o public class SiteFileFetch extends Thread { 7bk=D~/nSg N$&)gI:
W"3YA+qpI SiteInfoBean siteInfoBean = null; //文件信息Bean u7>{#] long[] nStartPos; //开始位置 QVT|6znw long[] nEndPos; //结束位置 #E`wqI\' FileSplitterFetch[] fileSplitterFetch; //子线程对象 qnO>F^itF long nFileLength; //文件长度 r2b_$ boolean bFirst = true; //是否第一次取文件 o57r ,`N boolean bStop = false; //停止标志 #{f%b,.yxt File tmpFile; //文件下载的临时信息 bX*>Zm DataOutputStream output; //输出到文件的输出流 58]C``u@Y bf4QW JZD //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) OV>JmYe1{/ public SiteFileFetch(SiteInfoBean bean) throws IOException ;*+wg5| { ^uCZO siteInfoBean = bean; -d+o\qp"# //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); d
U}kimz tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); yq6Gyoi< if(tmpFile.exists ()) TmEJ!)* { DH IC:6EY bFirst = false; ja2BK\"1: read_nPos(); eN,6p'& } Ns2<wl- else &m5FYm\ { ^}Wk nStartPos = new long[bean.getNSplitter()]; !pJd^|4A] nEndPos = new long[bean.getNSplitter()]; ?"@`SEdnU2 } ]=Tle&yM+T 59k[A~)~ Fo.p}j+> tX.fbL@T } lnQfpa8j l$:?82{ qmy3pnL public void run() UlD]!5NO {
I?R?rW //获得文件长度 `fM]3]x> //分割文件 E7`Q=4@e //实例FileSplitterFetch KAI/*G\z //启动FileSplitterFetch线程 gt \O //等待子线程返回 wg}rMJoG| try{ 96#aGh> if(bFirst) p|0ZP6!| { 2~B9 (| nFileLength = getFileSize(); VKb=)v[K if(nFileLength == -1) !kQJ6U { )RCva3Ul System.err.println("File Length is not known!"); yM
PZ} } opIbs7k- else if(nFileLength == -2) w l#jSj%pd { {b,#l]v System.err.println("File is not access!"); Ha41Wn'tZ } E'^$~h$ else o,yZ1" { /D~MHO{ for(int i=0;i<nStartPos.length;i++) ]!'}{[1} { 0\KDa$'1k nStartPos = (long)(i*(nFileLength/nStartPos.length)); v/G)E_ } BenUyv1d for(int i=0;i<nEndPos.length-1;i++) "lnI@t{o { ]w/%> nEndPos = nStartPos[i+1]; wQw&.)T } T`W37fz0 nEndPos[nEndPos.length-1] = nFileLength; :8LK}TY7 } (Kg( 6E, } AAc*\K XCyAt;neon f+V^q4 //启动子线程
:zK\t5 fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; LUKt!I0l for(int i=0;i<nStartPos.length;i++) N / Fa^[ { cMZ- fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), 6}JW- sA siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), f7v|N) nStartPos,nEndPos,i); []<N@a6VA> Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); @!KG;d:l fileSplitterFetch.start(); UZ-[vD1n } neBcS[ // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), /I~(*X siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); $,8}3R5} // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", 8;<3Tyjzu nEndPos = " + nFileLength); "NvB@>S // fileSplitterFetch[nPos.length-1].start(); G_v^IM#B= HLb`'TC3r+ |_u|Td(n //等待子线程结束 \H{UJ //int count = 0; $Ma*q EB //是否结束while循环 KYM%U"j D boolean breakWhile = false; A|<i7QVY /#Lm)-%G a_(fqoW while(!bStop) ^X|Bzz) { bZCNW$C3l write_nPos(); ZRn!z`.0 Utility.sleep(500); f5P@PG]{ breakWhile = true; 9iM[3uyO 7*(K%e"U 9D{p^hd for(int i=0;i<nStartPos.length;i++)
tk66Ggi[K { fD~f_Wr if(!fileSplitterFetch.bDownOver) >o4Ih^VB { n _eN|m?@ breakWhile = false; ftRzgW); break; s0/y> ok } 2B[I-
K s } 'tJ@+(tqw if(breakWhile) HSlAm&Y\ break; I;UCKoFT L8~zQV$h b@ OF //count++; PwS7!dzH- //if(count>4) ve*m\DU // siteStop(); &d@N3y } O)D+u@RhH @,;VMO H:4?sR3 System.err.println("文件下载结束!"); gV;9lpZ2 } .2x`Fj;o1 catch(Exception e){e.printStackTrace ();} v@Bk)Z } >vZ^D KA{JSi ~mk>9Gp //获得文件长度 ,Wlw#1fP public long getFileSize() 1+9}Xnxb { ,niQs+'< int nFileLength = -1; =@s {H + try{ DpvMY94Qh URL url = new URL(siteInfoBean.getSSiteURL()); %3es+A@ HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); fa2hQJ02 httpConnection.setRequestProperty("User-Agent","NetFox"); f<LRM aB2t /ua g;\_MbfP int responseCode=httpConnection.getResponseCode(); \!df)qdu if(responseCode>=400) H&=fD` Xq { g&fq)d processErrorCode(responseCode); 3)_(t.$D return -2; //-2 represent access is error @
Br? } R@lA5w 2T3b6 ;bYLQ String sHeader; a=AP*adx8 lJ(];/% P|rreSv* for(int i=1;;i++) ;, ^AR{+x { IZ&FNOSZ+4 //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); p{w:^l( //Utility.log(in.readLine()); E#(dri*#t
sHeader=httpConnection.getHeaderFieldKey(i); "4WwiI9 if(sHeader!=null) ANlzF&K { #iAw/a0& if(sHeader.equals("Content-Length")) 2}kJN8\F { #8i9@w nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); !H4C5wDu break; !f)^z9QX8 } r@ v&~pL } ;C~:C^Q\H else UUDZ break; 1aS66TS3 } KpfQ=~' } "q3W&@ catch(IOException e){e.printStackTrace ();} @9\L|O'~? catch(Exception e){e.printStackTrace ();} #s0Wx47~
k'PN fx\K `c /mmS Utility.log(nFileLength); ?.6fVSa \KkAU 6 \><v1x>; return nFileLength; ;]Ko7M(4 } ;\rKkH"K8n B;^YHWJ6i d/l>~%bR //保存下载信息(文件指针位置) D:fLQ8a private void write_nPos() v<V9Z
<ub { {7+y56[yu try{ +~'ap'k m output = new DataOutputStream(new FileOutputStream(tmpFile)); +uB.)wr output.writeInt(nStartPos.length); VD+y4t'^ for(int i=0;i<nStartPos.length;i++) cnR18NK { :i/uRR // output.writeLong(nPos); x|U[|i,; output.writeLong(fileSplitterFetch.nStartPos); r"=6s/q7 output.writeLong(fileSplitterFetch.nEndPos); xL\R-H^c] } OG{vap) output.close(); t+2,;G } TRku(w1f catch(IOException e){e.printStackTrace ();} N\W4LO6 catch(Exception e){e.printStackTrace ();} DH'0# } on)$y&lu UCI !>G \@F!h8e4 //读取保存的下载信息(文件指针位置) @{o3NR_ private void read_nPos() W'f)W4D$6 { t[HA86X try{ %C~LKs5oH DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); k/.a
yLq int nCount = input.readInt(); R d>PE=u nStartPos = new long[nCount]; V^qkHm e nEndPos = new long[nCount]; a:}&v^v for(int i=0;i<nStartPos.length;i++) OuV
f<@a { d>}R3T nStartPos = input.readLong(); Q}kXxud nEndPos = input.readLong(); ;*q } O`D,> =[ input.close(); 92=huV } b";D*\=x catch(IOException e){e.printStackTrace ();} !y-,r4\@` catch(Exception e){e.printStackTrace ();} CINC1Ll_24 } o 12wp aT20FEZ; z P=3B%$ private void processErrorCode(int nErrorCode) hVdPO { yvt
:/X System.err.println("Error Code : " + nErrorCode); `;v>fTcy } J6J|&Z~UT, 48"=,IrM {B)-+0 6 //停止文件下载 UQ.DKUg public void siteStop()
Mt
{ y3Lq"?h bStop = true; ];hK5 for(int i=0;i<nStartPos.length;i++) [zc8f fileSplitterFetch.splitterStop(); 0mY KzJi jR@J1IR< 0uwe,; } Y0ouLUlI } *|^}=ioj* //负责部分文件的抓取 2/.I6IbL **FileSplitterFetch.java drW}w+! */ Nc[[o>/Cb package NetFox; IM*T+iRKqF YCS8qEP& j6r.HYX! import java.io.*; I>(-&YbC import java.net.*; >w)A~ F< x'hUw* PBY^m+
public class FileSplitterFetch extends Thread { Yb=Z`) .jvRUD8A7 m5\/7 VC String sURL; //File URL :+$/B N:iO long nStartPos; //File Snippet Start Position EViQB.3w\ long nEndPos; //File Snippet End Position >cRE$d? int nThreadID; //Thread's ID D<UX^hU
boolean bDownOver = false; //Downing is over >do3*koA boolean bStop = false; //Stop identical ;@lC08SE FileAccessI fileAccessI = null; //File Access interface Gz@/:dW^vZ IPEJ7n49 O\ph!?L public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException Hsvu&>[`S { <6[P5> this.sURL = sURL; z2DjYTm[~ this.nStartPos = nStart; _1U7@v:<@ this.nEndPos = nEnd; ebmU~6v k nThreadID = id; R4q)FXW29 fileAccessI = new FileAccessI(sName,nStartPos);//定位 rIo)'L$uU } {*Tnl-m~ C|H/x\?zRv \o=YsJ8U public void run() 8 CN~o|uN { i\94e{uty[ while(nStartPos < nEndPos && !bStop) &I=F4 z { LG>lj$hO -na oM <[w>Mbqj_ try{ n1
kh8, URL url = new URL(sURL); YDoVm? HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); hB 36o9|9 httpConnection.setRequestProperty("User-Agent","NetFox"); OF/DI)j3 String sProperty = "bytes="+nStartPos+"-"; mjXO}q7 httpConnection.setRequestProperty("RANGE",sProperty); [lbe_G; Utility.log(sProperty); g@][h_? { M<VZISu)dy SJ;Kjq.Qo InputStream input = httpConnection.getInputStream(); %X>P+6<= //logResponseHead(httpConnection); 1@p'><\ |6y(7Ha :rhh=nHgn byte[] b = new byte[1024]; cO^}A(Ma( int nRead; 2pn8PQfg) while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) vivU4:uH3 { />[X
k nStartPos += fileAccessI.write(b,0,nRead); 7PG|e# //if(nThreadID == 1) 3IHA+Zz // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); ^s[OvJb } .W1i3Z 6g -/z #?J\ "[M k5tM Utility.log("Thread " + nThreadID + " is over!"); Z9vJF.clO bDownOver = true; [S#QGB19 //nPos = fileAccessI.write (b,0,nRead); >UDb:N[ } Wi3St`$ catch(Exception e){e.printStackTrace ();} +(qs{07A$ } +PGtO9}B } [ yf&]0 |uRZT3bGyj "Oj2B|:s& //打印回应的头信息 6-vQQ-\ public void logResponseHead(HttpURLConnection con) - BE.a< { #V:28[ for(int i=1;;i++) QXg9ah~ { s!Y`1h{ String header=con.getHeaderFieldKey(i); )/_T`cN if(header!=null) XEvDtDR //responseHeaders.put(header,httpConnection.getHeaderField(header)); 0 CFON2I Utility.log(header+" : "+con.getHeaderField(header)); syR
+; else
#:st>V_h break; q;0QI{:5v } ;*=MI/"N } ~w9.}
#HF;yAc #mK?K public void splitterStop() hfQx$cv6 { \yNe5 bStop = true; 4(O;lVT} } s_`=ugue k5ZkD+0Jo `SH#t3
5, } ~D$?.,=l ,OilGTQ#
~!A*@aC /* E`aAPk_y **FileAccess.java e"]*^Q *//文件访问(定位,写) F^bzE5# package NetFox; ~+r"%KnG import java.io.*; zJ7=r#b k,UezuV s1| +LT,D public class FileAccessI implements Serializable{ U9ZWSDs d9>k5! //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 ?}D|]i34 RandomAccessFile oSavedFile; 1y)|m63& long nPos; >nA6w$
@+(TM5Ub Ebk_(Py\ public FileAccessI() throws IOException 5l
ioL) { P.Uz[_&l6 this("",0); gk.c"$2 } Rz_fNlA JDA :)[; p[Yja y+ public FileAccessI(String sName,long nPos) throws IOException WP b4L9< { K9 tuiD+j oSavedFile = new RandomAccessFile(sName,"rw"); EX.`6,:+2 this.nPos = nPos; (ev(~Wc oSavedFile.seek(nPos); alB[/.1 } vsU1Lzna6@ (g>>
+>,4d public synchronized int write(byte[] b,int nStart,int nLen) )1!jv! { Q\ AM]
U int n = -1; ;#F7Fp *U try{ ci~pM<+
oSavedFile.write(b,nStart,nLen); MsL*\)*s n = nLen; $%ts#56* }
0M^v%22 catch(IOException e) xct{Tv[FO { y:>'1"2` e.printStackTrace (); @! gJOy } D:yj#&I /y.+N`_ rnV\O L return n; }#3'72 } <E`Ygac ,( ?q I2R"
Y< } G?t<4MTv HpD<NVu A_mVe\(*M /* $aFCe}3b< **SiteInfoBean.java >#Obhs|S{C */ bQ3EBJT{P package NetFox; b?~%u+'3 O
DLRzk( bZB7t`C5 public class SiteInfoBean { 1oSrhUTy $%3"@$ ? !dy private String sSiteURL; //Site's URL mEUdJvSG( private String sFilePath; //Saved File's Path 2{sx"/k\A private String sFileName; //Saved File's Name ^=lh|C\# private int nSplitter; //Count of Splited Downloading File rv\yS:2 P!apAr wePhH*nQ> public SiteInfoBean() *h `P+_Q7 {//nSplitter的缺省值为5 (pl|RmmDz //default value of nSplitter is 5 ^"?fZSC this("","","",5); =y$|2(6 } *QIlh""6 5ZX P$. D[NJ{E.{ public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) 1@}`dc { W8$ky[2R sSiteURL= sURL; v%=@_`Ht sFilePath = sPath; 0^L>J"o sFileName = sName; :U}. this.nSplitter = nSpiltter; TBGN',, _=wu>h&7 B`)gXqBt } VJeoO)<j K>tubLYh "\x<Zg; public String getSSiteURL() #'@pL0dj { 8{t^< j$n return sSiteURL; zree}VqD;5 } 8)wxc1 9uNkd2# gyt[ZN_2 public void setSSiteURL(String value) 0Q]ZS { kTjx. sSiteURL = value; @&AUbxoj } ?OYK'p.
<:,m ^{IF2_h" public String getSFilePath() 3($ cBC { +4N7 _Y return sFilePath; N}j]S{j}' } -8r';zR /3VSO"kcZ mO6rj=L^ public void setSFilePath(String value) CTG:C5OK { #s\HiO$BT sFilePath = value; C3XB'CL6 } [%);N\o2Y P0B`H7D Q=,6W:j public String getSFileName() $y0[AB|V { k"kGQk4 return sFileName; %|tDb } e6
R<V]g !>,\KxnM /f5*KRM public void setSFileName(String value) 4Pbuv6`RK { LkUYh3 sFileName = value; "}ms| } rF3QmR?l ]d4`PXI m ll-cp public int getNSplitter() b.LMJ'1 { &zxqVI$4 return nSplitter; / bxu{|. } IpJMq^Z klwC.=?(j" PQkFzyk public void setNSplitter(int nCount) 4P406,T]r { 6ka,
FjJ\ nSplitter = nCount; VIXY?Ua } a'[Ah2}3r< } vDeb?n Tuk::
.jD qy9RYIfZ /* rwJCVkF **Utility.java ,EE,W0/zzM */ YR 5C`o package NetFox; P1r)n{; vky@L! &, u%o]r9xl' public class Utility { d;4LHQ0yU tRl01&0S g+X .8>= public Utility() Rz #&v { ~yGD("X #cnh
~O XTibx;yd< } uPmK:9]3R Ug VLHwkvk //线程睡眠 @PaOQ@ public static void sleep(int nSecond) I)JqaM { dHzQAqb8J try{ pZ@)9c Thread.sleep(nSecond); |g$n-t } v_ U$jjO1 catch(Exception e) >-%}'iz+ { @L 9C_a e.printStackTrace (); pL&
Zcpx } ,cesQ
ou } <-]qU}- JNJ96wnX1 //日志 N<$dbqoT| public static void log(String sMsg) V,*<E &+ { RZ6[+Ygn System.err.println(sMsg); b-`=^ny)K } /O^aFIxk '[Ue0r<jn [f1'Qb public static void log(int sMsg) Fv<^\q { Fx3CY W System.err.println(sMsg); F3%8E<QZd; } _K4E6c_ } 7xhBdi[ dQ yMd<<:Ap o#^(mGj_. /* Bh#?:h&f **TestMethod.java *\n-yx] */ h:4Uv}Z package NetFox; Bp7`W:?#" YV{^2)^ WLy%|{/ public class TestMethod { R [[
#r5q vGX}zzto $$5E+UDOs public TestMethod() Ik\n/EE { ///xx/weblogic60b2_win.exe Z]QpH<Z try{ '&;s32']} SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); oy _DYop //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); <27:O,I SiteFileFetch fileFetch = new SiteFileFetch(bean); .:b&$~< fileFetch.start(); Fhk 8 } >iKbn catch(Exception e){e.printStackTrace ();} jO5,PTV Nuebxd UG!528;7 } , S
} [Zpx
:r} ~0 PR>QJ public static void main(String[] args) l!d |luqbA { &>xd6- new TestMethod(); (v)/h>vS } DD?zbN0X } -r'/PbV0 点击下载更多相关资料
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