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/* [p_C?hHO **SiteFileFetch.java KHXnB */ N
DV_/BI package NetFox; S>p>$m,
Q import java.io.*; DnPV
Tp(> import java.net.*; cj/FqU" nyB~C7zR "A9 c] public class SiteFileFetch extends Thread { cb~m==G \>-%OcYlM U
z6XQskX SiteInfoBean siteInfoBean = null; //文件信息Bean Yt;.Z$i , long[] nStartPos; //开始位置 tI(co5 W long[] nEndPos; //结束位置 .{W)E FileSplitterFetch[] fileSplitterFetch; //子线程对象 sWnU*Q long nFileLength; //文件长度 YEqWTB|w boolean bFirst = true; //是否第一次取文件 Bhrp"l
+| boolean bStop = false; //停止标志 :!Tb/1 File tmpFile; //文件下载的临时信息 v4Q8RE? DataOutputStream output; //输出到文件的输出流 {z}OZHJN ) 4'@=q //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) /1lUFL2D public SiteFileFetch(SiteInfoBean bean) throws IOException CR$5'#11) { =>6'{32W_ siteInfoBean = bean; 89)rss //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); Y,@{1X`0@3 tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); +P <Lo I if(tmpFile.exists ()) +<H)DPG< { etH%E aF[ bFirst = false; dGzZ_Vf read_nPos(); *l^%7Wrk } 4<&`\<jZ else qcfLA~y { _#+~#U%5n nStartPos = new long[bean.getNSplitter()]; Kq';[ Yc nEndPos = new long[bean.getNSplitter()]; s0"1W"7vh } !(Y23w* #X"eg DP9hvu/85 QY<2i-A } X^H)2G>e Dl%NVi+n Pw'3ya8 public void run() m.p{+_@M& { 8+1tys //获得文件长度 7>J8\= //分割文件 ;[@<
, //实例FileSplitterFetch Ui7S8c#tH //启动FileSplitterFetch线程 u1&pJLK0[ //等待子线程返回 Ij }RlYQz try{ ~$i36" if(bFirst) 70:a2m { ?c^0%Op nFileLength = getFileSize(); 2@aVoqrq# if(nFileLength == -1) K/jC>4/c/ { {@oYMO~ System.err.println("File Length is not known!"); kGMI
? } 7PZ0 else if(nFileLength == -2) rr#&0`] { Khxl'qj System.err.println("File is not access!"); ALiXT8q } fG5 U' Vw else m$:o+IH/ { b{t'Doe for(int i=0;i<nStartPos.length;i++) }cG!93 { P/?` nStartPos = (long)(i*(nFileLength/nStartPos.length)); n||/3-HDj } F%x8y for(int i=0;i<nEndPos.length-1;i++) g#1_`gK { Cv|ya$}a nEndPos = nStartPos[i+1]; r"a0!]n } gYx|Na,+ nEndPos[nEndPos.length-1] = nFileLength; YzSUJ=0/ } 8|w_PP1oE } iP;X8'< BC 0zaE?dA] (<pc4#B@* //启动子线程 =$IjN v(? fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; 40oRO0p for(int i=0;i<nStartPos.length;i++) -Vk+zEht { nqt;Ge
M fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), &V[m{. siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), q7C>A`w nStartPos,nEndPos,i); XU .FLNe Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos);
WLEjRx fileSplitterFetch.start(); uHUicZf. } V7!x-E/ // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), C9U~lcIS siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); o@r+Y // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", eqQA st#~ nEndPos = " + nFileLength); m#mM2Guxe // fileSplitterFetch[nPos.length-1].start(); !h{qO&ZH= 2`Xy}9N/Y z)r)w?A //等待子线程结束 HP2]b?C //int count = 0; #m6 eG&a //是否结束while循环 _U)DL=a' boolean breakWhile = false; INsc!xOQ e;56}w E/9 U0 while(!bStop) _pM&Ya { C$xU!9K[+ write_nPos(); _gjsAbM Utility.sleep(500); e7ixi^Q breakWhile = true; rE-Xv.
| CEE`nn ;Id%{1 for(int i=0;i<nStartPos.length;i++) 6)kF!/J { b/ h,qv if(!fileSplitterFetch.bDownOver) :Q=Jn?Gjb { 1GVJ3VXt breakWhile = false; 74rz~ZM
5 break; e;R5A6| } B i?DmrH } /+ vl({vV if(breakWhile) 7$+n"Cfm break;
(CS"s+y1 LZV Iu^#+n //count++;
%lAJ]$m //if(count>4) ? r=cLC // siteStop(); )R+@vh#Q<$ } W\o(f W
eP$0TDZ xXM`f0s@+] System.err.println("文件下载结束!"); ]QM6d(zDA } )Fk%,H-1 catch(Exception e){e.printStackTrace ();} `9Zoq=/ } 0Np}O=> 9`+c<j4/B UwrinkoeE //获得文件长度 I|,^a|\ public long getFileSize() 2GA6@-u\ { V=BF"S;-' int nFileLength = -1; ~S15tZ $ try{ sXkWs2! URL url = new URL(siteInfoBean.getSSiteURL()); %p)6m2Sb HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); |j$&W;yC httpConnection.setRequestProperty("User-Agent","NetFox"); IY?[ 0S gR"'|c bWo-(
qxq int responseCode=httpConnection.getResponseCode(); 2c@R!* if(responseCode>=400) ~sshhuF { /cUcfe#X processErrorCode(responseCode); (X@JlAfB return -2; //-2 represent access is error 0:R} } .@ZqCH ~xpU<Pd* hV])\t=yf String sHeader; G0Smss=K ngj=w;7~+ I4ZL+a for(int i=1;;i++) 4:=']C { snOd
3Bw //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); v-J*PB.0p //Utility.log(in.readLine()); So\(]S sHeader=httpConnection.getHeaderFieldKey(i); Q5b?-
P if(sHeader!=null) h.ojj$f, { *fso6j#% if(sHeader.equals("Content-Length")) (p'yya{( { >_(Xb%w nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); "]Wrir?l break; +^YXqOXU } O E0w/{ } T>e!DOW; else =0TnH<` break; mS5'q q;t } '+N!3r{G } 1w/1k6`0 catch(IOException e){e.printStackTrace ();} uA7~`78 catch(Exception e){e.printStackTrace ();} %+YLe-\? \RyOexNZ FA<|V!a Utility.log(nFileLength); R<@s]xX_ M5s>;q) k{(R.gLZG return nFileLength; I4:4)V? } {v+,U} \:-#,( .V ^&buX_nlO //保存下载信息(文件指针位置) ,y>,?6:> private void write_nPos() I3]-$ { ?*|AcMw5 try{ im|(
4f output = new DataOutputStream(new FileOutputStream(tmpFile)); trcG^uV output.writeInt(nStartPos.length); Q{T6t;eH for(int i=0;i<nStartPos.length;i++) 7T9m@ { MWl?pG!Y // output.writeLong(nPos); [X]yj output.writeLong(fileSplitterFetch.nStartPos); IL` X}=L_ output.writeLong(fileSplitterFetch.nEndPos); G?CaCleG } q,3_)ZOq output.close(); A94ZG: } '=K
[3%U catch(IOException e){e.printStackTrace ();} bhDV U(%I6 catch(Exception e){e.printStackTrace ();} ma[%,u` } O*xC}$OOn u9My.u@-*% P&"8R //读取保存的下载信息(文件指针位置) hJ$o+sl private void read_nPos() !|;^ { M3ihtY try{ gR}>q4b DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); $#4Qv5} int nCount = input.readInt(); pQAG%i^mF nStartPos = new long[nCount]; _jg&}HM nEndPos = new long[nCount]; u:AKp<' for(int i=0;i<nStartPos.length;i++) xDU>y { ;[TC`DuNj0 nStartPos = input.readLong(); 'QW/TJ=7r nEndPos = input.readLong(); 6x|"1
G{ } 'RK.w^ input.close(); V/5.37FSb } CZ"~N` catch(IOException e){e.printStackTrace ();} ?,uTH
4 catch(Exception e){e.printStackTrace ();} _L
5< } a,g3/ &HBqweI i3#To}g5V private void processErrorCode(int nErrorCode) idW= { b5K6F:D22 System.err.println("Error Code : " + nErrorCode); !=%0 } )rcFBD{vM \JmfQrBQ A/V"&H[ //停止文件下载 .XDY1~w0 public void siteStop() U$jw8I'. { D#Qfa!=g bStop = true; afrU>#+" for(int i=0;i<nStartPos.length;i++) "!43,!< fileSplitterFetch.splitterStop(); \ldjWc<S nF$n[: ,ab_u@ } W[Kv
Qt3% } 8axz`2 ` //负责部分文件的抓取 !-%fCg(B **FileSplitterFetch.java I3sH8/* */ gwVfiXR4 package NetFox; 7OuzQzhcK n[DQ5l &D@/_m $ import java.io.*; n.9k< import java.net.*; vC$Q4>m
MO}J EC9D.afy& public class FileSplitterFetch extends Thread { \i1>/`F ;VM',40 ~DY5`jV String sURL; //File URL j7r! N^ long nStartPos; //File Snippet Start Position :eIPPh|\ long nEndPos; //File Snippet End Position j{}-zQ]n int nThreadID; //Thread's ID w&&uk[Gh/a boolean bDownOver = false; //Downing is over 9{&APxm boolean bStop = false; //Stop identical P(iZGOKUs= FileAccessI fileAccessI = null; //File Access interface : (IPrQ 2K >tI9); WH:[Y7D public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException Ve/"9?Y_ { ]LGp3)T- this.sURL = sURL; +Smt8O<N this.nStartPos = nStart; nT7{`aaQl this.nEndPos = nEnd; <eWGvIEP[ nThreadID = id; $xx5+A%, fileAccessI = new FileAccessI(sName,nStartPos);//定位 38Rod]\E } $7Sbz&)y3 #bRr|` ;VQFz&Q$u public void run() JiFy.Pf { W40GW while(nStartPos < nEndPos && !bStop) oL?[9aww { t:A,pT3 00DWXGt20o $#Mew:J try{ 1-z*'Ghys URL url = new URL(sURL); xL.T}f~y2> HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); {sn :Lj0 httpConnection.setRequestProperty("User-Agent","NetFox"); 'Na \9b( String sProperty = "bytes="+nStartPos+"-"; -I, _{3.S httpConnection.setRequestProperty("RANGE",sProperty); 44s
K2
Utility.log(sProperty); ]J=S\ k:?+75?$ eFO+@
InputStream input = httpConnection.getInputStream(); n])-+[F //logResponseHead(httpConnection); M~&|-Hm
i?7%z` {HgW9N( byte[] b = new byte[1024]; re.%$D@ int nRead; s3G\L<~mB while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) p(2j7W-/ { ,H{
/@|RW nStartPos += fileAccessI.write(b,0,nRead); K?l1Gj //if(nThreadID == 1) |=OO$z;q| // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); R=D\VIu,Z } mtfyhFk to0tH^pD %9_wDfw~ Utility.log("Thread " + nThreadID + " is over!"); jgiP2k[Xom bDownOver = true; v\9:G //nPos = fileAccessI.write (b,0,nRead); m wuFXu/ } )9,*s!)9 catch(Exception e){e.printStackTrace ();} 2>{_O?UN } \L#BAB6z } uj.~/W1,! Lh=~3 WY@x2bBi //打印回应的头信息 f;/t7=>d public void logResponseHead(HttpURLConnection con) *
*?mZtF { (wJtEoB9^ for(int i=1;;i++) ;OYwZ { /)80@ String header=con.getHeaderFieldKey(i);
]
=Js 5 if(header!=null) //--r5Q //responseHeaders.put(header,httpConnection.getHeaderField(header)); {$iJYS\ Utility.log(header+" : "+con.getHeaderField(header)); (xU+Y1*g"% else {Y5h*BD> break; my#qmI } Isq3YY } 9Ao0$|@b {GF>HHQb ^qpa[6D6x public void splitterStop() vOYcS$,^X% { .js4)$W^ bStop = true; -;$+`<% } UQ|zSalv, F"a^`E& PVO9KWv** } oH+UuP2a-J oeXNb4; 4 >J=x";,D|~ /* YtQKsM **FileAccess.java FV/xp}nz *//文件访问(定位,写) da@y*TO#i package NetFox; 1{ #Xa= import java.io.*; !2x"'o Q6S[sTKR )Jx!VJ^Y public class FileAccessI implements Serializable{ IidZ-Il l,/q#)5[ //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 $8&HpX#h$ RandomAccessFile oSavedFile; ,8uu,,c long nPos; ;U<)$5 f5a%/1? /x_C public FileAccessI() throws IOException @];#4O { MW9B
-x this("",0); ,IUMH]D } U]sU
b3 (2@b ,w^ 4qda!% public FileAccessI(String sName,long nPos) throws IOException 4x'^?0H@ { 1elx~5v1.= oSavedFile = new RandomAccessFile(sName,"rw"); y_"GMw this.nPos = nPos; )EO/P+& oSavedFile.seek(nPos); EpGe'S } [[D}vL8d P's <M )ymF:]QC public synchronized int write(byte[] b,int nStart,int nLen) *DkA$Eu3u { ,WOF) int n = -1; 9[N'HpQ3 try{ nVG\*#*]| oSavedFile.write(b,nStart,nLen); NQfIY`lt' n = nLen; Vm8;{S q } ]_BG"IR!.. catch(IOException e) [v-?MS { 6@2p@eYo e.printStackTrace (); af{;4Cr } !W$3p'8Tu K=sQ_j.&Z 9r1pdG_C@ return n; E08AZOY&g } B4R,[WE" `@.YyPxX\ svpWABO } ! #
tRl ECkfFE` |0f\>X I /* qw87B!D **SiteInfoBean.java O8u"Y0$*w */ 2|}p&~G( package NetFox; 8Z3+S)6 y8+?:=N. lRt8{GFy public class SiteInfoBean { 4)j<(5 ]^
O<WD 3UC8iq* private String sSiteURL; //Site's URL W\f7fVU private String sFilePath; //Saved File's Path d+T]EpQJ* private String sFileName; //Saved File's Name n]Dq private int nSplitter; //Count of Splited Downloading File L&3=5Bf9 Tjs-+$P+ bT{P1nUu public SiteInfoBean() !W$Br\< {//nSplitter的缺省值为5 62(WZX%b //default value of nSplitter is 5 flLmZ1" this("","","",5); [RpFC4W } p'w[5' [F/x U 9: ~,TH public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) $E7yJ|p{ { N_0&3PUSM sSiteURL= sURL; [q.W!l4E sFilePath = sPath; qE,%$0g sFileName = sName; O1#rCFC|y this.nSplitter = nSpiltter; I:6xDDpZG` KktTR`W RM<\bZPc } M2xUs bkOm/8k|4 5 #kvb$97 public String getSSiteURL() !d(!1fC { g<.8iW 'c return sSiteURL; |e< U %v } coLn};W2 0>e>G (4(8 !-MG"\#Wq public void setSSiteURL(String value) p`d:g
BZ { ]hf4= gm sSiteURL = value; rz7yAm } ]`4QJ;#
Osy5|Ts *<0g/AL public String getSFilePath() t3s}U@(C { JnsXEkM) return sFilePath; gSe{S } moo>~F _^ mmjB1L t!i F(R\ public void setSFilePath(String value) wUV%NZB { LB{a&I LG sFilePath = value; 8 Zj>|u } 73<iK]*c qJ!oH&/cD e5XikLu public String getSFileName() [&`>&u@MK { =:0(&NCRq return sFileName; 11-uJVO~* } ^y6CV4T+ h`GV[Oo : O0{v`|w9+ public void setSFileName(String value) RCX4;,DHx { B+Bv(p sFileName = value; RI*%\~6t? } L"-&B$B: ut,"[+J hBqu,A public int getNSplitter() U&/S { >S3 >b return nSplitter; <A&R%5Vs } *oWzH_ =N0cz% =~S
public void setNSplitter(int nCount) o{Ep/O` { uJ y@ nSplitter = nCount; vSL{WT]m } h/VYH(Tj }
CFA> R"=M5 |V7a26h /* (1HN, iJy **Utility.java 0zxeA+U */ MtB:H*pM package NetFox; ;Dgp
!*v= #P@r[VZ{6 {p\KB!Y- public class Utility { 24Tw1'mW 18HHEW{ u'b_zlW@ public Utility() +~v(*s C { %jf gncW l`]!)j|+ M*HG4(n0 } !Ch ya e_;6UZ+ //线程睡眠 igL^k`&5^" public static void sleep(int nSecond) /Rz,2jfRx' { `qgJE_GC try{ l{AT)1;^ Thread.sleep(nSecond); <>oW f } Uwk|M?94 catch(Exception e) ;v'Y'!-J { "8]170 e.printStackTrace (); c 1GP3 }
f#nmr5F } u"T^DrRlQ HXQrtJ //日志 lTP02|eK public static void log(String sMsg) 'W*F[U*&HP { rY= #^S System.err.println(sMsg); 463dLEd } }{y$$X<:
BSf"'0I& u\wd<<I'] public static void log(int sMsg) iE`aGoA { l :"*]m7o_ System.err.println(sMsg); 7KIQ)E'kG| } :[39g;V}c } c53`E U k#&SWp= .#J3UZ /* 0}V'\=F454 **TestMethod.java ~dLZ[6Z */ nSiNSLv package NetFox; H%N+Vr3O, ||HIp9(3 uSJP"Lw public class TestMethod { pAuwSn#i 5XHkRcESZ {LDb*'5Cy public TestMethod() h_L '_* { ///xx/weblogic60b2_win.exe cFvx*n try{ #VE$C3< SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); HWBom8u0 //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); 5aNDW'z`f SiteFileFetch fileFetch = new SiteFileFetch(bean); c,wU?8Nc|$ fileFetch.start(); /f<(K-o] } i#=X#_
+El catch(Exception e){e.printStackTrace ();} @k,(i=** 7p$*/5fk #O+]ydvT } #^ #i]{g ZtoE=7K du,-]fF public static void main(String[] args) {SJ7Yfs { ?<QFW#:) new TestMethod(); BaAb4{ } :nUsC+oBS } bicL%I2h 点击下载更多相关资料
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