-
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
|
/* ,9C~%c0Pw **SiteFileFetch.java U<*8KiI */ @N-P[.qL" package NetFox; %fyah}= import java.io.*; O*ql!9}E{ import java.net.*; C;6Nu W %;r0,lN|II o=1M<dL public class SiteFileFetch extends Thread { z[I3k h8Bs=T / ao|v SiteInfoBean siteInfoBean = null; //文件信息Bean -Pr1r long[] nStartPos; //开始位置 K; +w'/{ long[] nEndPos; //结束位置 &ZRriqsQg FileSplitterFetch[] fileSplitterFetch; //子线程对象 .ZB(!v/2 long nFileLength; //文件长度 /Y>$w$S boolean bFirst = true; //是否第一次取文件 ;ss,x
boolean bStop = false; //停止标志 =wEqI)Td File tmpFile; //文件下载的临时信息 FKOTv2 DataOutputStream output; //输出到文件的输出流 V4PV@{G O{^ET:K@ //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) ^rmcyy8;g public SiteFileFetch(SiteInfoBean bean) throws IOException QD6in>+B@ { P@m_tA% siteInfoBean = bean; 3:XF7T //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); YQ&Ww|xe tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); !5hNG('f if(tmpFile.exists ()) INd:_cT4l { 8+>r!)Q+ bFirst = false; SpM|b5c5 read_nPos(); LovVJ^TD0i } zJH#J=O else Y -Zw' { [f^:V:){ nStartPos = new long[bean.getNSplitter()]; dOm@cs nEndPos = new long[bean.getNSplitter()]; )<?^~"h } F ka^0 ^ucmScl o_.f7|U! oTtJ]`T } /E/Z0<l7 qSg#:;(O J<"=c
z$ public void run() y_>l'{w3^ { n#2tFuPE //获得文件长度 ^~3u|u //分割文件 @B@`V F //实例FileSplitterFetch "Cj{Z@n //启动FileSplitterFetch线程 &tNnW //等待子线程返回 )Vn(J#s try{ }de{- if(bFirst) Yq6e=?- { <sALA~p|0 nFileLength = getFileSize(); 7Rba@ cs9 if(nFileLength == -1) Xjy5Yj { U?bQBHIC System.err.println("File Length is not known!"); PQ u_]cXI } E%[2NsOM] else if(nFileLength == -2) Hwz.5hV" { <}\!FuC System.err.println("File is not access!"); V<:)bG4;d } F9Hxqa#1T else St1Ny,$yU { >@g+%K] for(int i=0;i<nStartPos.length;i++) HX;JO[0 { '7oWN,- nStartPos = (long)(i*(nFileLength/nStartPos.length)); ;p/%)WW } S%^*h{9u" for(int i=0;i<nEndPos.length-1;i++) ~t>i+{JKE { LU-,B?1 nEndPos = nStartPos[i+1]; ]4uY<9VL } Q7!";ol2 nEndPos[nEndPos.length-1] = nFileLength; &>@ } "^Ax}Jr } L[D<e?j e5}KzFZmZ IO@Ti(, //启动子线程 z]twh&^1L fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; 33M10
1X{6 for(int i=0;i<nStartPos.length;i++) z0jF.ub { tL#]G?0d fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), CDT%/9+- siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), pzQWr*5a nStartPos,nEndPos,i); nNEIwlj; Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); 'm4v)w<y# fileSplitterFetch.start(); sTb@nrRxH } ~jpdDV&u\ // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), Dcep^8' siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); q-3e^-S* // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", ?BEO(;' nEndPos = " + nFileLength); G@N-+ // fileSplitterFetch[nPos.length-1].start(); smJ#.I6/L ~Pm[Ud ;bMmJ>[l- //等待子线程结束 ju8DmC5 //int count = 0; ng-rvr //是否结束while循环 |EjMpRNE boolean breakWhile = false; 79bt%P H!81Pq~ %8]~+#]p while(!bStop) !D!1%@
e { P'Gf7sQt7 write_nPos(); RHIGNzSz Utility.sleep(500); 'Cp]Q@]\ breakWhile = true; PX$_."WA Yo^9Y@WDW *@-a{T} for(int i=0;i<nStartPos.length;i++) AnD#k] { #
VAL\Z if(!fileSplitterFetch.bDownOver) iuGly~ { 8ED}!;ZU breakWhile = false; Es^=&2'' break; Q\qI+F2? } 5_yu4{@;y } Z<4Du if(breakWhile) +W}dO# break; 4*Y`Pn@ z<~yns`Y. w dpd` //count++; f8vWN //if(count>4) *_,: &Ur // siteStop(); Ce.*yO<- } pLtAusx hVLVMqd 0V!@*Z System.err.println("文件下载结束!"); 3$#=*Zp } Pgh)+>ON catch(Exception e){e.printStackTrace ();} '1NZSiv+C? } T {B\1|2w mzH3Q564 zYZ^/7) //获得文件长度 _u QxrB"9 public long getFileSize() +h?Rb3=S { G$7!/O%#_ int nFileLength = -1; e00s*LdC try{ u7G9 eN URL url = new URL(siteInfoBean.getSSiteURL()); d:GAa HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); 7a5G,C#QQ httpConnection.setRequestProperty("User-Agent","NetFox"); 9zac[tno 'j oE-{ vWq/A . int responseCode=httpConnection.getResponseCode(); ~z&Ho if(responseCode>=400) yT pvKCC { ^QbaMX processErrorCode(responseCode); bG&vCH;}% return -2; //-2 represent access is error cjyb:gAO } :(Uz`k7 .~jn
N ,mm9X\ ' String sHeader; snti*e4"V aX,ux9# C#@>osC for(int i=1;;i++) F?.J1] { m[E#$JZtG //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); ?CHFy2%Y //Utility.log(in.readLine()); \L4+Dv<z sHeader=httpConnection.getHeaderFieldKey(i); >#8J@=iuqv if(sHeader!=null) GJP\vsaQ { +8eW/Bs@2 if(sHeader.equals("Content-Length")) +E8}5pDt { kf>L nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); [>xGynU0 break; O}cg1Q8p } BzyzOtBp3L } +~cW0z else +t`QHvxv break; UCDvN } & GM&, } zyF[I6Gs catch(IOException e){e.printStackTrace ();} `|d&ta[{ catch(Exception e){e.printStackTrace ();} ?>
SH`\ s\#eD0| 1h0cId8d Utility.log(nFileLength); -Yf pfNt jm$v0=W9# 5p5S_%R$e return nFileLength; ?Rg8u } B}A7Usm Bvy(vc=UDW q" %;),@ //保存下载信息(文件指针位置) "i3Q)$"S private void write_nPos() FdVWj
5 $a { 1> wt try{ r-SQk>Y} output = new DataOutputStream(new FileOutputStream(tmpFile)); 2 bQC2 output.writeInt(nStartPos.length); ee5QZ, for(int i=0;i<nStartPos.length;i++) EPMdR66 { ? W`?F // output.writeLong(nPos); TRSR5D[ output.writeLong(fileSplitterFetch.nStartPos); Tr@} output.writeLong(fileSplitterFetch.nEndPos); a|\ZC\(xI } I%q&4L7pj output.close(); Mb#-I
GZ } j)[
wX catch(IOException e){e.printStackTrace ();} 4lqowg0 catch(Exception e){e.printStackTrace ();} WF{rrU: } V/jEMJNks ]/y&5X 5I(gP //读取保存的下载信息(文件指针位置) (!^(74 private void read_nPos() WV'FW)% { <Hq|<^_K try{ M6+_Mi. DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); L*VO2YI int nCount = input.readInt(); f/:XIG nStartPos = new long[nCount]; %kg%ttu7 nEndPos = new long[nCount]; !a[1rQH for(int i=0;i<nStartPos.length;i++) ^dzg'6M { JRC+>'}Xj nStartPos = input.readLong(); i-b++R/WN nEndPos = input.readLong(); b]NSCu*)s } @qfVt input.close(); }cL9`a9j } :(|;J<R%_ catch(IOException e){e.printStackTrace ();} n~#%>C7 catch(Exception e){e.printStackTrace ();} x_JCH7- } L.[ H
L{)e1 p]q 'y
[eH private void processErrorCode(int nErrorCode) CE$c/d[N. { R^.oM1qu| System.err.println("Error Code : " + nErrorCode); 24)3^1P\V } (o1*7_]e McgTTM;E %r0yBK2uOp //停止文件下载 _91g=pM public void siteStop() Bf;dp`(/ { n#
%mL< bStop = true; 3%]%c6 for(int i=0;i<nStartPos.length;i++) d7y`AS@q6 fileSplitterFetch.splitterStop(); gL(ny/Ob9 ?v>!wuiP lCDu,r;\ } 2Y)3Ue } *7Ct#GC //负责部分文件的抓取 +s:!\(BM **FileSplitterFetch.java }@Ij}Ab> */ a
W`q package NetFox; _-&\~w ~Cx07I_lf YK/?~p9: import java.io.*; |hjm^{!TpW import java.net.*; ~n$VCLa $ ZD1_sJ. nk,X6o9% public class FileSplitterFetch extends Thread { :A\8#]3 ~a:0Q{>a r^mP'# String sURL; //File URL 8,p nm long nStartPos; //File Snippet Start Position hBf0kl long nEndPos; //File Snippet End Position l+'@y (}Q int nThreadID; //Thread's ID K14e"w%6rs boolean bDownOver = false; //Downing is over <FIc! boolean bStop = false; //Stop identical Gpws_jw FileAccessI fileAccessI = null; //File Access interface 2r2qZ#I} QAigbSn] `Ym7XF& public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException epsh&)5a* { Q#
w`ZQX3 this.sURL = sURL; |*5K fxq this.nStartPos = nStart; ?(el6 J} this.nEndPos = nEnd; %|$h<~ nThreadID = id; tCAh?nR fileAccessI = new FileAccessI(sName,nStartPos);//定位 k{<]J5{7 } f"zXiUV &v7$*n27 xJtblZ1sr public void run() :?%$={m { Hn5:*;N while(nStartPos < nEndPos && !bStop) l2"{uCcA { +jePp_3$O v1Tla]d >4>!zZ try{ ld8 E!t[ URL url = new URL(sURL); {<{
O! HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); !63p?Q= httpConnection.setRequestProperty("User-Agent","NetFox"); 7U>Xi'? String sProperty = "bytes="+nStartPos+"-"; tLXwszR0r httpConnection.setRequestProperty("RANGE",sProperty); ;uj&j1 Utility.log(sProperty); QFMR~6 ? C?jk#T >58N P1[k InputStream input = httpConnection.getInputStream(); j+He8w-4 //logResponseHead(httpConnection); <rZ(B>$ K' xN>qc 9P;}P!W byte[] b = new byte[1024]; S)T]>Ash int nRead; { O+d7,C while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) @sUYjB { r>4HF"Nm nStartPos += fileAccessI.write(b,0,nRead); h+)XLs //if(nThreadID == 1) TbqH-R3W // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); o$]wd*+ } (_h<<`@B
C7#ji"t b^[Ab:`}[V Utility.log("Thread " + nThreadID + " is over!"); ~.99H bDownOver = true; qPeaSv]W //nPos = fileAccessI.write (b,0,nRead); u;f${Wn'3 } @X@?jj& catch(Exception e){e.printStackTrace ();} wVU.j$+_# } -FRMal4Pg0 } :.wR *E mw2/jA7 ]X
y2km] //打印回应的头信息
q1!45a public void logResponseHead(HttpURLConnection con) W^{zlg { Ws%@SK for(int i=1;;i++) Dv~W!T i { 0LEJnl String header=con.getHeaderFieldKey(i); 84g$V}mp if(header!=null) \)KLm //responseHeaders.put(header,httpConnection.getHeaderField(header)); RCM;k;@8V Utility.log(header+" : "+con.getHeaderField(header)); 1vKAJ<4W else FXMrD,qVg break; Qh*"B } En01LrC? } {m%]`0 f793yCiG zh8\
_>+ public void splitterStop() +9LIpU&5 { HK_Vk\e bStop = true; = BcKWC } []^fb,5a <'WS -P%U M_
* KA } S7i,oP7 8EbJ5wu/%S ?'>pfU /* 'cp1I&> **FileAccess.java CK[w0VCT *//文件访问(定位,写) ,#n$YT7 package NetFox; N@}5Fnk- import java.io.*; EWz,K]_' 1eod;^AP9 v_U+wga public class FileAccessI implements Serializable{ i2bkgyzB. Xy(8} //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 `Hlv*" w$ RandomAccessFile oSavedFile; ZC7ZlL_ long nPos; $2!|e,x ;t6)(d4z? }EJAC*W, public FileAccessI() throws IOException |q+3X)Y { b}&2j3-n, this("",0); 4~8!3JH39 }
Dk^,iY(u su2|x E4}MU}C#[ public FileAccessI(String sName,long nPos) throws IOException E^ub8 { 0c{-$K} oSavedFile = new RandomAccessFile(sName,"rw"); A^L8" this.nPos = nPos; Y8i'=Po%, oSavedFile.seek(nPos); 9Rf})$o+ } @%"+;D 3lh^maQ] L0^rw|Z%' public synchronized int write(byte[] b,int nStart,int nLen) Nw3K@Ge { [hhPkJf|f int n = -1; ve3-GWT{C try{ PiL[&_8g oSavedFile.write(b,nStart,nLen); Hl|EySno n = nLen; -F->l5 } cc0e(\ catch(IOException e) v35!?
5{ { gdj,e ^ e.printStackTrace (); :,8eM{.Q } E]MyP=g$ xZ\`f-zL w?JRY return n; ]K<mkUpY } Xi
8rD"v ;rvZ!/ (Zi,~Wqm$ } U"T>L s[dq-pc" +.3,(l /* a_V.mu6h6p **SiteInfoBean.java K?J?]VCw */ f.e4 C, package NetFox; sjW;Nsp *K#Ci1Q bnZ`Wc*5b public class SiteInfoBean { _~}n(?> }f;cA &sA@! private String sSiteURL; //Site's URL Y^(NzN private String sFilePath; //Saved File's Path 35}]U= private String sFileName; //Saved File's Name <jz\U7TBf private int nSplitter; //Count of Splited Downloading File ?S2!'L {G i:W/jJ b^dBX public SiteInfoBean() 9zKbzT] {//nSplitter的缺省值为5 K0 6 E: //default value of nSplitter is 5 Om,M8!E this("","","",5); 5^0K5R6GQf } #J w\pOn #Zq[.9!q{
\X] public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) VT:m!<^
{ b&g`AnYT sSiteURL= sURL; kN8?.V%Utw sFilePath = sPath; x7!YA>
sFileName = sName; m&I5~kD this.nSplitter = nSpiltter; q% pjY /4{.J=R} egHvI&w"o } n[c/L8j &{=`g+4n V|T3blG?D public String getSSiteURL() uc?`,;8{` { p}K\rpvJpu return sSiteURL; $ 0Up. } s9.nU <x->.R_ :/6gGU>pu public void setSSiteURL(String value) dt1,!sHn { )K>2 sSiteURL = value; =5D@~?W ZG } Z.{r%W{2 "v[?`<53^l -MTO=#5z public String getSFilePath() r4wnfy { _VFL}<i return sFilePath; Z#_ +yw } (cpaMn@)g cuUlr noSBwP|v* public void setSFilePath(String value) bqI| wGCA" { ?]Z EK8c sFilePath = value; O ]Stf7]%; } O~u@J'4 'boAv%1_sa RxrUnMF public String getSFileName() c
;@k\6 { YA'_Ba(v) return sFileName; `mo>~c7 } w@Gk# :d`8:gv? KGq4tlM6 public void setSFileName(String value) bR&<vrMmrA { FK!UUy; sFileName = value; F3,djZq } dq
U.2~9 *Jm U",X <Q%:c4N public int getNSplitter() ?[~)D}] j { v>]^wH>/" return nSplitter; N \Wd0b } W*D].| ypA)G /; NX5NE2@^qH public void setNSplitter(int nCount) AfOq?V { ?&>H^}gDZ nSplitter = nCount; }y P98N5o } /{7we$+,p } AYLCdCoK.
l6uUS K-f\nr /* q1O}dSPwX **Utility.java VN[i;4o:| */ .jps6{ package NetFox; 3NA
G}S *iW$>Yjb M!E#T-) public class Utility { |Je+y;P7 M_monj}Z eOI#T'5 public Utility() cojbuo { 8OW504AD h1uD >heGl xB&6f") } JHCV7$RS lS:R## //线程睡眠 $xsmF?Dsx5 public static void sleep(int nSecond) {x8UL7{ { bAl0z)p try{
%=O$@.%Zc Thread.sleep(nSecond); HxmCKW! } YvP u%=eF catch(Exception e) /|.
|y
S9 { _Mis-K:]{? e.printStackTrace (); Fo1|O&> } mlmXFEC } 1 n86Mp1.e $EuWQq7OI2 //日志 {=K u9\ public static void log(String sMsg) v8L&F9
o { +v}R-gNR System.err.println(sMsg); (KDv>@5 } w'b|*_Q4Q xp>p#c 95G*i;E public static void log(int sMsg) 9ywPWT[^ { .+"SDtoX System.err.println(sMsg); T'TxC) } s`$px2Gw } vs)1Rm @Fl&@ $ cKj6tT"=O /* [Bz'c1 **TestMethod.java uPtHCP6 */ sa71Vh{ package NetFox; &2!F:L .7nr :P W2a9P_ public class TestMethod { XU}sbbwu ]GS@ ub .2jG~_W[ public TestMethod() pSq3\#Twr { ///xx/weblogic60b2_win.exe )n[ oP% try{ GAlAFsB SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); 5 ^\f[} //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); rl,6ru SiteFileFetch fileFetch = new SiteFileFetch(bean); :_qgpE< fileFetch.start(); >Tm|}\qEb } zJfoU*G/B catch(Exception e){e.printStackTrace ();} TZ7{cekQ t:
= Q.Kr;64G } srN>pO8u~ #6tb{ws3 ly d[GfJ public static void main(String[] args) ;5P>R[p { tN5brf new TestMethod(); Rp 2~d } FJN,er~T[ } !0g+} 点击下载更多相关资料
|