-
UID:2537
-
- 注册时间2006-05-09
- 最后登录2020-05-29
- 在线时间3小时
-
- 发帖8
- 搜Ta的帖子
- 精华
0
- 铜板1641
- 人品值95
- 贡献值0
- 交易币0
- 好评度8
- 信誉值0
- 金币0
-
访问TA的空间加好友用道具
- 发帖
- 8
- 铜板
- 1641
- 人品值
- 95
- 贡献值
- 0
- 交易币
- 0
- 好评度
- 8
- 信誉值
- 0
- 金币
- 0
- 所在楼道
|
/* +c\fDVv **SiteFileFetch.java ec"L*l" */ bG2!5m4L package NetFox; ?=Ma7 y import java.io.*; "b-6kM import java.net.*; G78rpp b4oZ@gVR; F
=d L#@^ public class SiteFileFetch extends Thread { A
g/z\kX 9FJU'$FN h+N75 SiteInfoBean siteInfoBean = null; //文件信息Bean $Iqt
c)DA long[] nStartPos; //开始位置 T][\wyLx1 long[] nEndPos; //结束位置 7CrWsQl u FileSplitterFetch[] fileSplitterFetch; //子线程对象 ==UH)o`?8 long nFileLength; //文件长度 XXxX;xz$ boolean bFirst = true; //是否第一次取文件 9-}&znLZe boolean bStop = false; //停止标志 /PHktSG File tmpFile; //文件下载的临时信息 s-
g[B( DataOutputStream output; //输出到文件的输出流 sx*(JM}Be +de.!oY //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) LLaoND6 public SiteFileFetch(SiteInfoBean bean) throws IOException o*5|W9 { 0r:8ni%cL siteInfoBean = bean; ]<++w;#+x //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); ph^qQDA tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); B-r9\fi, if(tmpFile.exists ()) *$(9,y\ { 4v E,nx= bFirst = false; D/@:wY read_nPos(); E
hd* } X Uh)z else O6k[1C { HZfcLDrO nStartPos = new long[bean.getNSplitter()]; YBHmd nEndPos = new long[bean.getNSplitter()]; K _O3DcQ } :R<,J=+$u <<4G GO 8c]\4iau _y5b>+ } GW.s\8w r(i<H%"Z A+;]# 1y(D public void run()
fwXk{P/ { 1c?,= ;> //获得文件长度 F}i rCi47c //分割文件 !Y`nKC(=z //实例FileSplitterFetch 36&7J{MU //启动FileSplitterFetch线程 @: %}clZ //等待子线程返回 tEBf2|< try{ +>c)5Jih if(bFirst) pEhWgCL { cs~
}k7>< nFileLength = getFileSize(); _;X# &S(q- if(nFileLength == -1) UmInAH4 { R1J"QU System.err.println("File Length is not known!"); 0&-!v?6) } eJ2[=L' else if(nFileLength == -2) dtm_~r7~ { `I_%`1 5> System.err.println("File is not access!"); ~>s^/`|? } /c__{?go else 1cOp"! { a,lH6lDk for(int i=0;i<nStartPos.length;i++) ]<W1edr { *C's7O{O nStartPos = (long)(i*(nFileLength/nStartPos.length)); LFV;Y.-(h } w#XE!8` for(int i=0;i<nEndPos.length-1;i++) H\^5>ccU>V { C=%go1! $ nEndPos = nStartPos[i+1]; K& 2p<\2 } tlqDY1 nEndPos[nEndPos.length-1] = nFileLength; od?Q&'A } q:1 1XPP } 6t/})Xv U{eC^yjt"o bKG:_mWe w //启动子线程 fgTvwOSk fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; |w /txn8G| for(int i=0;i<nStartPos.length;i++) _.Uz!2 { n1buE1r? fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), %>5Ht e< siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), =eTI@pN` nStartPos,nEndPos,i); q`9~F4\ Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); -+Quw2465^ fileSplitterFetch.start(); `C_#EU- } dpE\eXoa, // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), {&w%3 siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); }wj*^>* // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", "Z}0 A/y nEndPos = " + nFileLength); #; }IHAR // fileSplitterFetch[nPos.length-1].start(); .'D+De&y POUB{ba ;#fB=[vl"; //等待子线程结束 gEU)UIJ //int count = 0; 5g/^wKhKG //是否结束while循环 K2:r7f boolean breakWhile = false; dA\>z[n= }[ux4cd8Y ot(|t4^ while(!bStop) as~. XWa { rw_&t>Ri; write_nPos(); $`_(%tl Utility.sleep(500); PX2Ejrwj breakWhile = true; 7b@EvW6X} !i}G>*XH, R%3H"FU9w for(int i=0;i<nStartPos.length;i++) Y k~ i.p { _2f}WY3S if(!fileSplitterFetch.bDownOver) 8a.
|CgI#h { T7cT4PAW breakWhile = false; \mWXr*; break; S)JZb_ } e/@udau } Yn1 U@! if(breakWhile) !j YV,:' break; hTVN`9h7 >SfC '* 1 j]
M)i:n //count++; ~R!(%j ] //if(count>4) s/P\w"/fN // siteStop(); rYm<U!k } !4.;Ftgjn )m5<gp ` y<3v/,Y System.err.println("文件下载结束!"); G/<{:R" } /:awPYGH<1 catch(Exception e){e.printStackTrace ();} f()^^ + } '*-X3p b;!ilBc S$muV9z2= //获得文件长度 :*c@6;2@ public long getFileSize() o#0NIn"GS/ { 5\QNGRu" int nFileLength = -1; -@^SiI:C try{ &[RC 4^;\V URL url = new URL(siteInfoBean.getSSiteURL()); fjp>FVv3 HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); {"{J*QH httpConnection.setRequestProperty("User-Agent","NetFox"); ;;l( .=^h@C*
Mh3zl int responseCode=httpConnection.getResponseCode(); B(^fM!_%-6 if(responseCode>=400) ;]nU-> { @&EE/j^ processErrorCode(responseCode); ]p0m6}B return -2; //-2 represent access is error 2px5>4< } BLMcvK\9 j#!J
hi ~xvQ?c?- String sHeader; fCEd
:Kr _}JygOew ?{{E/J:% for(int i=1;;i++) b[RBp0]x { ch :428 //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); %@pTEhpF //Utility.log(in.readLine()); eTrGFe!8w sHeader=httpConnection.getHeaderFieldKey(i); }[i35f[w if(sHeader!=null) y)(SS8JR { \V:
_Zs if(sHeader.equals("Content-Length")) A9lqVMp64 { 4eIu@
";! nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); /I6?t=?< break; hk,Q=}; } Oa@X! \ } dWm[#,Q? else zROyG break; D-,sF8{ i } Pu
axS } T<! `~#kM catch(IOException e){e.printStackTrace ();} )(DV~1r= catch(Exception e){e.printStackTrace ();} dHOz;4_ Ii[rM/sG e,1Jxz4QH Utility.log(nFileLength); [$H8?J SB
\ptF ]]`+aF0 return nFileLength; D 3Int0n } 1/1P;8F@G iZ_R
oJ 7 ic]q, //保存下载信息(文件指针位置) 4&t6 private void write_nPos() mX |AptND { ]7xAL7x try{ \=5CNe output = new DataOutputStream(new FileOutputStream(tmpFile)); 2d1'!B
zDA output.writeInt(nStartPos.length); Gl1`Nx0 for(int i=0;i<nStartPos.length;i++) J`"1DlH { fDbs3"H Q // output.writeLong(nPos); m+uh6IqN./ output.writeLong(fileSplitterFetch.nStartPos); F ^E(AE output.writeLong(fileSplitterFetch.nEndPos); E,C<ox4e } fylaH(LER output.close(); c wpDad[Kx } 5~.\rcr% catch(IOException e){e.printStackTrace ();} D=dY4WwG catch(Exception e){e.printStackTrace ();} $X\BO& } 6xBP72L;%" &ul9N)A (Yw5X_|
//读取保存的下载信息(文件指针位置) xX"?3%y> private void read_nPos() 1p8E!c{}j { }#yRaIp try{ ;W+.]_$6)T DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); N8nyTPw int nCount = input.readInt(); #Q$4EQB nStartPos = new long[nCount]; DI$zyj~3 nEndPos = new long[nCount]; X.272q<. for(int i=0;i<nStartPos.length;i++) qt;6CzL
C { 4AF"+L nStartPos = input.readLong(); f-{[ushj nEndPos = input.readLong(); ,;D74h2F } Rj E,Wn input.close(); >StvP=our } Js=|r;' catch(IOException e){e.printStackTrace ();} SH`"o catch(Exception e){e.printStackTrace ();} ".w*_1G7U } *`l>1)B> &Vonu* 3'.OghI private void processErrorCode(int nErrorCode) hw1ZTD:Y { txL5'mK System.err.println("Error Code : " + nErrorCode); (U7%Z< } H%%#^rb^ @*2FG\c< =6+BBD //停止文件下载 G:@gO2(D public void siteStop() gE$dz#t. { g#70Sg*d bStop = true; 47icy-@kg for(int i=0;i<nStartPos.length;i++) 0kiW629o fileSplitterFetch.splitterStop(); Rw.
Uz& L)w& f 2"i<--Y } a7d782~ } }RoM N$r //负责部分文件的抓取 -D(UbkPw **FileSplitterFetch.java !w/~dy */ 2{#quXN9 package NetFox; 6DR8(j)=[% !'[sV^ds wCI.jGSBW import java.io.*; i_=P!%, import java.net.*; FS@SC`~(
*y0`P0V|8 8a05`ZdP public class FileSplitterFetch extends Thread { \<PX'mnO @D60 'wQ=b String sURL; //File URL sJ0y3)PQ long nStartPos; //File Snippet Start Position #
=322bnO long nEndPos; //File Snippet End Position ^qk$W?pX int nThreadID; //Thread's ID \T[*|"RFZ boolean bDownOver = false; //Downing is over chiQ+ boolean bStop = false; //Stop identical Ar):D#D FileAccessI fileAccessI = null; //File Access interface }& 1_gn15 J#X 7Ss 3~ZtAgih% public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException :X$&gsT/, { Az)P&*2:'` this.sURL = sURL; ;N/c 5+ this.nStartPos = nStart; wvc?2~` this.nEndPos = nEnd; r^\^*FD | nThreadID = id; Q 5jP`<zWU fileAccessI = new FileAccessI(sName,nStartPos);//定位 Z]Qm64^I } Y@r#:BH) o 86}NqK kv'n W public void run() ?`w ~1 { rzO:9# d while(nStartPos < nEndPos && !bStop) Gpgi@
Uf { .z{7
rH EG 1SIEo h]D=v B try{ :s$9#}hw, URL url = new URL(sURL); KlrKGmy,) HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); N.&K"J httpConnection.setRequestProperty("User-Agent","NetFox"); w1GCjD*y String sProperty = "bytes="+nStartPos+"-"; qrdA?VV httpConnection.setRequestProperty("RANGE",sProperty); o?%x!m> Utility.log(sProperty); xpS#l"dr \XpPb{:> D&oC1 InputStream input = httpConnection.getInputStream(); @RnG K 5 //logResponseHead(httpConnection); 3s|tS2^4 -({\eL$n L~yy;)]W byte[] b = new byte[1024]; gZPJZN/cpz int nRead; f?{Y<M~] while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) ", |wG7N
K { V)0bLR nStartPos += fileAccessI.write(b,0,nRead); DL~LSh //if(nThreadID == 1) 4$|G$h // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); @*_K#3 }
g`Rs; Xpa;F$VI ,O-lDzcw Utility.log("Thread " + nThreadID + " is over!"); 2`Pk@,:_ bDownOver = true; Lc.7:r //nPos = fileAccessI.write (b,0,nRead); ~ h:^Q } ^<E,aCy catch(Exception e){e.printStackTrace ();} "~+K`*0r8 } ~\oJrRYR` } SS`\,%aog yV]-![`D 2.NzB7c*CM //打印回应的头信息 v\HGL56T public void logResponseHead(HttpURLConnection con) a1}W2;W0]g { Z>D7C?v:( for(int i=1;;i++) bh_ALu^CSX { .Ftml' ! String header=con.getHeaderFieldKey(i); A] F K\ if(header!=null) SOUA,4 //responseHeaders.put(header,httpConnection.getHeaderField(header)); =-:o?&64 Utility.log(header+" : "+con.getHeaderField(header)); E@@quK else R4v=i)A~Z break; C2b.([HE } '@W72ML. } U}5uy9A JZ c5U}i M.128J+xfS public void splitterStop() -S|L+">=Z { ,{oANqP bStop = true; `#(4K4]1. } o?X\,}-s grS,PKH tl4;2m3w } SMhT>dB nBD7 %v|,-B7Yx /* F(w>lWs; **FileAccess.java 4s"HO/ *//文件访问(定位,写) O-G@To3\ package NetFox; &/zsIx+ import java.io.*; 77
`/YE#M k\%{1oRA NKMB,b public class FileAccessI implements Serializable{ wHY;Y-(ZT pG4Hy$e //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 ! [: K/ RandomAccessFile oSavedFile;
/!9949XV long nPos; t=pG6U #uH1!UQb HD`%Ma
Yhc public FileAccessI() throws IOException I#mT#xs6 { yy>4`_ this("",0); Uvuvr_IP } S\f^y8*< 6[CX[=P30 D,)~j6OG8 public FileAccessI(String sName,long nPos) throws IOException BHU[Rz7x { wY=ky629 oSavedFile = new RandomAccessFile(sName,"rw"); s+CWyW@ this.nPos = nPos; O+e8}Tmm oSavedFile.seek(nPos); \
0CGS } `\qU.m0(j ypsCyDQK` 2T|L##C public synchronized int write(byte[] b,int nStart,int nLen) 8^~ljf]6 { l >O]Cpt int n = -1; "w A8J%: try{ IGp-`%9 oSavedFile.write(b,nStart,nLen); :2?'mKa7 n = nLen; %TR->F } 8"4`W~ 3 catch(IOException e) >!oN+8[~ { > W0hrt?b e.printStackTrace (); ;j(xrPNb } cis~]x% 0 @,@ d- ]% return n; YnNei 7R } xqG`
_S
l .N5"IY6> -Rf|p(SJ,E } adxJA}K} bEy%S"\< <n#JOjHV /* JD'/m
hN0 **SiteInfoBean.java !k[zUti */ M35}5+ package NetFox; >DV0!'jW [Y:HVr, --]\z* x public class SiteInfoBean { ~#-`Qh "zv+|_ZAfd $]hf2Yr( private String sSiteURL; //Site's URL ))MP]j9
T private String sFilePath; //Saved File's Path {jv1hKTa private String sFileName; //Saved File's Name !"1bV
[^ private int nSplitter; //Count of Splited Downloading File rKjQEO$yi WUxr@0 jLEU V public SiteInfoBean() jRBx7|ON {//nSplitter的缺省值为5 (*2"dd //default value of nSplitter is 5 x~(Ul\EX this("","","",5); 8m9G^s`[ } FTB"C[> lF#Kg!-l 0m@S+$v public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) !X,S2-}" { ,CvU#ab8$ sSiteURL= sURL; 'DIE#l` sFilePath = sPath; Q647a} sFileName = sName; }x8fXdd this.nSplitter = nSpiltter; PzF)Vg [Z[)hUXE? >,9t<p=Q } >U}~Hv] `C=p7% m+!%+S1 public String getSSiteURL() J^?O]| { >:K3y$]_ return sSiteURL; c1z5t]d } k'\RS6M`L kC#;j=K? v<-D>iJ public void setSSiteURL(String value) |UBJu `% { ROfmAc sSiteURL = value; )dvOg'it } x~mXtqg %?cPqRHJ ~ kiECJ@5p public String getSFilePath() NR3IeTd { )-sEm`(`I9 return sFilePath; eygyVhJ } ES+&e/G"ds @.gCeMlOf .)o5o7H public void setSFilePath(String value) 'IgtBd|K> { a@X'oV`(2b sFilePath = value; Kzmgy14o } |n~v_V2.0 TX
87\W. Wqqo8Y~fq public String getSFileName() '|+_~ZO*d { =GpLlJ`- return sFileName; mHhm~u } ]A\n>Z!; K;Xn!:) V: E6G^?k~q public void setSFileName(String value) {7;TQ?/ { :DZiDJ@ sFileName = value; 6?Wsg`9 } 68d @By kj[[78
U]P;X~$! public int getNSplitter() ZzE&? { oNdO@i%.q4 return nSplitter; H4pjtVBr } 9#agI|d~ ~ 7k
b4[ 1|%$ie public void setNSplitter(int nCount) 7,jqA"9 { b_LzG_n! nSplitter = nCount; d`xqs,0f } N
Lo>"<Xb } Z,2uN!6 (thzWr6; `?>OY&( /* U_J|{*4S.! **Utility.java OO@$jXZB */ _6|b0*jv'& package NetFox; Zw3|HV(so ;xRyONt 9DT}sCLz:B public class Utility { d
EXw=u '3xSzsDn x^
Wgo`v) public Utility() ,p2
Di { duM>(y ,5/gNg \gzNMI* } g_q{3PW. HS2)vd@) //线程睡眠 EEaFi8 public static void sleep(int nSecond) |GsLcUv6 { Qejzp/2 try{ yZ2,AR% Thread.sleep(nSecond); MdPwuXI } !nd*U}q catch(Exception e) 2vur_`cV { oi!E
v_h e.printStackTrace (); 1]qhQd-u } C{,nDa?| } d9^h
YS{ `Ffn:=Do //日志 \t(/I=E8/ public static void log(String sMsg)
xE}q(.] { rVO+
vhih System.err.println(sMsg); ClEtw } ](O!6_'d D4S>Pkv
%++q+pa public static void log(int sMsg) ;TR.UUT { a7CJ~8-1K System.err.println(sMsg); ^o{O5&i] } w,P2_xk` } :8rqTBa` /!LfEO lKa}Bcd /* v<c8qg **TestMethod.java Z$@Juv&>5^ */ @hCGV'4 package NetFox; M^bujGD +XQS
-= <?I~ + public class TestMethod { 1M+mH#? ^,rbA>/L m!PN1$9V public TestMethod() |+[bKqI5 { ///xx/weblogic60b2_win.exe 5bAy@n try{ !W6]+ SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); [#.QDe //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); ul:jn]S* SiteFileFetch fileFetch = new SiteFileFetch(bean); jKtbGVZ7r fileFetch.start(); VfQSfNsi } /2YI!U@A catch(Exception e){e.printStackTrace ();} -dza_{&+iZ b,!h[ T+gqu
&9R } * %MY. # {?
6]_J K}*s^*X public static void main(String[] args) FkRrW^?5G { g{i(4DHm( new TestMethod(); [WB8X, } \Q
&Kd| } 2AdV=n6Z 点击下载更多相关资料
|