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/* ^v!im\ r **SiteFileFetch.java b!]0mXU */ )@qup _M@ package NetFox; (a} import java.io.*; P=^#%7J/l import java.net.*; QP%kL*=8 6!B^xm.R @ (kC} ,} public class SiteFileFetch extends Thread { tQ~<i %; ~g1, !Wl X
B*}P SiteInfoBean siteInfoBean = null; //文件信息Bean m*!f%}T long[] nStartPos; //开始位置 ^$IZLM?E~ long[] nEndPos; //结束位置 14D7U/zer FileSplitterFetch[] fileSplitterFetch; //子线程对象 *w/WHQ`xI long nFileLength; //文件长度 /u)Rppu boolean bFirst = true; //是否第一次取文件 :B=8_M boolean bStop = false; //停止标志 NGD*ce"w File tmpFile; //文件下载的临时信息 Q0cY/'>4 DataOutputStream output; //输出到文件的输出流 x48'1&m 7B(bH8 //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) `4%;qLxngP public SiteFileFetch(SiteInfoBean bean) throws IOException `\jTpDV_W { h.V]f S siteInfoBean = bean; YN@6}B#1 //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); NLQE"\#a tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); 'e]HP-Y< if(tmpFile.exists ()) @ EmGexLPM { d9Z&qdxTKq bFirst = false; ZCQ<%f read_nPos(); 90s;/y( } T|@#w%c'' else Cqgk { %f(S'<DhC nStartPos = new long[bean.getNSplitter()]; JzMZB"Z? nEndPos = new long[bean.getNSplitter()]; pDq#8*q+v } #9`r XEz YZGS-+ w(/DTQc~d -@2'I++"@ } #SQvXMT {y-2 1TNz&=e public void run() tqf&N0*
{ 0||"r&:X //获得文件长度
4;C*Fa //分割文件 dC`tN5 //实例FileSplitterFetch _1sMY hI //启动FileSplitterFetch线程 L)F1NuR //等待子线程返回 $;Vc@mYGW; try{ BWUt{,?KU if(bFirst) j1YH9T#|D { a@#Q:O)4 nFileLength = getFileSize(); ]U,CKJF%/ if(nFileLength == -1) fxDj+Q1p { )nwZ/&@ System.err.println("File Length is not known!"); qL|
5-(P } B6bOEPQ else if(nFileLength == -2) H`m:X,6} { oYz!O]j;a System.err.println("File is not access!"); tAqA^f*{ } ~BZXt7DE else j z~[5m}J { QCOLC2I for(int i=0;i<nStartPos.length;i++) ja[OcR-tX { Vkr`17`G nStartPos = (long)(i*(nFileLength/nStartPos.length)); '{[!j6wt\ } y" ^yYO for(int i=0;i<nEndPos.length-1;i++) Di*]ab { (0i'Nb" nEndPos = nStartPos[i+1]; n%/i:Whs } ImIqD&a-h nEndPos[nEndPos.length-1] = nFileLength; 1^C|k(t } _>Pk8~m } iJdP>x H9RGU~q4s[ 3Y
z]8`C //启动子线程 5W+{U8\ fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; +UxI{,L for(int i=0;i<nStartPos.length;i++) {A|bBg1! { =fl%8"%N& fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), SLkuT`* siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), XHs d- nStartPos,nEndPos,i); } ^"0T-ua Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); %}C9 fileSplitterFetch.start(); &1wpGJqm } rA,CQypo // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), Xv0F:1 siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); D?e"U_ // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", +W9]ED nEndPos = " + nFileLength); %3M95UZ2 // fileSplitterFetch[nPos.length-1].start(); TPHYz>D] |olNA*4 0p-#f|ET //等待子线程结束 FV
A
UR //int count = 0; IX9K.f //是否结束while循环 0[/vQ+O ]2 boolean breakWhile = false; -kl;!:'.3 A 4j<\xL 3gpo
% while(!bStop) c45tmul { sAi&A9"* write_nPos(); `(!NYx Utility.sleep(500); j 1(T )T breakWhile = true; *>k!hq;j $A`xhh[ !.EcP=S for(int i=0;i<nStartPos.length;i++) )1f+ld%R { o(qEkR:4kd if(!fileSplitterFetch.bDownOver) c3] C:t+ { XLm@etf breakWhile = false; I}+;ME|<2 break; $jG4pPG } :#{-RU@PS } (/K5! qh if(breakWhile) D`Gt break; ^agj4$ =EW3&+Lt vX+.e1m //count++; qD-fw-,: //if(count>4) [ ?iqqG. // siteStop(); ^av6HFQ } G>%AZr{M ?*H9-2W@ @9 )}cg System.err.println("文件下载结束!"); mb\h^cKaq } txq~+'A:+ catch(Exception e){e.printStackTrace ();} e .l!3xY2' } L/?]^!. 3OP.12^ p0M=t- //获得文件长度 (#o t^ public long getFileSize() !v9lk9SV { )TU<:V int nFileLength = -1; h*Je35
try{ tPU-1by$ URL url = new URL(siteInfoBean.getSSiteURL()); Uoji@ HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); s<vs:jna httpConnection.setRequestProperty("User-Agent","NetFox"); t`5j4bdG vXdZmYrC X|b2c+I int responseCode=httpConnection.getResponseCode(); 5ZK&fKeCF if(responseCode>=400) \}JrFc%O { #Qh>z%Mn^3 processErrorCode(responseCode); dl0FQNz8@B return -2; //-2 represent access is error - $JO8'TP } >w.'KR0L `T"rG}c c@R; /m:R String sHeader; \a)) L8&D(wh/f 8>N wCjN for(int i=1;;i++) !msNEE@[ { {%b
}Z2
//DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); Jdj?I'XtY //Utility.log(in.readLine()); |QMA@Mx sHeader=httpConnection.getHeaderFieldKey(i); oM,- VUr if(sHeader!=null) 2z_2.0/3 { 3c #s|qW if(sHeader.equals("Content-Length")) XE rUS80 { |g-b8+.=] nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); e1/sqXWo break; n ~,tQV } m\vmY } pSfYu=#f else ? \m3~6y break; @{d\j]Nw } <7)Fh*W@ } s0C:m catch(IOException e){e.printStackTrace ();} mR+Jws' catch(Exception e){e.printStackTrace ();} *1A&'T2 a#0;==# rzeLx Wt Utility.log(nFileLength); /ty?<24ko wLJ]&puwm tous#(&pK return nFileLength; S8vV!xO } UE :HMn6 XOy2lJ/ w%a8XnW]1 //保存下载信息(文件指针位置) GABQUmtH private void write_nPos() PJLR<9 { {fDTSr?/ try{ vF4]ux&
output = new DataOutputStream(new FileOutputStream(tmpFile)); |L::bx( output.writeInt(nStartPos.length); #X`8dnQZ for(int i=0;i<nStartPos.length;i++) aeP[+ I9 { cpZc9;@IC // output.writeLong(nPos); S%mfs!E> output.writeLong(fileSplitterFetch.nStartPos); Ug%_@t/? output.writeLong(fileSplitterFetch.nEndPos); jQh^WmN } 5[gh|I;D output.close(); !EBY@ Y1 } 0Scm?l3 catch(IOException e){e.printStackTrace ();} \9{F5Sz catch(Exception e){e.printStackTrace ();} 6GL=)0Ah } T!2=*~A T~xwo
3
hKBc0 //读取保存的下载信息(文件指针位置) }< 5F private void read_nPos() C~4PE>YtTv { %.HJK try{ zsXpA0~3s DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); E JK0 int nCount = input.readInt(); #8h;Bj nStartPos = new long[nCount]; r8/l P}(F nEndPos = new long[nCount]; aM=D84@ for(int i=0;i<nStartPos.length;i++) ?GT@puJS- { Di5(9]o2 nStartPos = input.readLong(); [A2`]CE<@ nEndPos = input.readLong(); (Ddp|a"b } .12aUXo( input.close(); </"4 zD| } w:i:~f . catch(IOException e){e.printStackTrace ();} )?aaBaN$ catch(Exception e){e.printStackTrace ();} C$yq\C+I } 1zxq^BI 0CExY9@Wq 1B=>_3_ private void processErrorCode(int nErrorCode) ,*svtw:2') { !Ng=Yk>3 System.err.println("Error Code : " + nErrorCode); ~P*4V]L^ } /t%u"dP"T~ O9M{ ). +A8j@d#: //停止文件下载 9N8I
ip]w public void siteStop() M8&}j { MCTsi:V>+ bStop = true; 'lz"2@4{ for(int i=0;i<nStartPos.length;i++) kOL'|GgK fileSplitterFetch.splitterStop(); DKL@wr}8 ]0V}D,V($ B%s7bS } N)2f7j4C& } L1{GL #qV //负责部分文件的抓取 5z}w}zdg **FileSplitterFetch.java 23F/\2MSG */ u.XQ& package NetFox; p=Q0!!_r TUK"nKSZ`. ,:2'YB import java.io.*; LNYKm~cN import java.net.*; =='Td[ J:*-gwv9*m }T2xXbU public class FileSplitterFetch extends Thread { D;}xr_ pKUP2m`MW %r\n%$@_ String sURL; //File URL 21X`h3+= long nStartPos; //File Snippet Start Position Dim>
7Wbh long nEndPos; //File Snippet End Position "r4AY int nThreadID; //Thread's ID N2r/ho}8 boolean bDownOver = false; //Downing is over [lzN !!B! boolean bStop = false; //Stop identical op2Of<{h FileAccessI fileAccessI = null; //File Access interface F9"w6;hh xM >W2 _gj&$zP public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException \>. LW9 { 1/+C5Bp* this.sURL = sURL; }|OaL*|u this.nStartPos = nStart; >SF Uy\3 this.nEndPos = nEnd; 1$/MrPT(b nThreadID = id; &F
*'B|n fileAccessI = new FileAccessI(sName,nStartPos);//定位 zE T^T5>: } B(g_Gm< Q#I"_G&{ %M
F;`; 1 public void run() K7knK { 4S"\~>< while(nStartPos < nEndPos && !bStop) \W5O&G-C { `3H4Ajzcc } p
FQRSOZ .T<=z try{ 96cJ8I8 URL url = new URL(sURL); {6;9b-a] HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); GYxM0~:$k httpConnection.setRequestProperty("User-Agent","NetFox"); 8H,4kY?Z String sProperty = "bytes="+nStartPos+"-"; ]B"'}%>ez httpConnection.setRequestProperty("RANGE",sProperty); z}QwP~Z Utility.log(sProperty); H(c72]@Vg lf{e[!ML' qU2~fNY InputStream input = httpConnection.getInputStream(); k %e^kej //logResponseHead(httpConnection); <P[T!gST bK"SKV i$G;f^Z!Y
byte[] b = new byte[1024]; XgN` 7!Z int nRead; h+p*=|j` while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) @+vXMJ $ { >WJf=F`_H nStartPos += fileAccessI.write(b,0,nRead); K5ZC:Ks //if(nThreadID == 1) (s<Dd2&.H // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); ;7]u!Q } iX u]e;6 RpWTpT1 '|]e<Mt- Utility.log("Thread " + nThreadID + " is over!"); 6*4's5>?D bDownOver = true; 0]KraLu"N //nPos = fileAccessI.write (b,0,nRead);
Amr[wx } ]xC#rwHUC catch(Exception e){e.printStackTrace ();} Ac2(O6 } q5h*`7f } `g8E1-]l Q$& sTM fH`P[^N //打印回应的头信息 =ph&sn$;L public void logResponseHead(HttpURLConnection con) ,g-EW
jN { rk+#GO{ for(int i=1;;i++) ~7~~S*EQ { ](tx<3h String header=con.getHeaderFieldKey(i); {2/LRPT if(header!=null) <DKS+R //responseHeaders.put(header,httpConnection.getHeaderField(header)); m }a|FS Utility.log(header+" : "+con.getHeaderField(header)); Y$N)^=7 else />¬$> break; B]m@:|Q } 4c
oJRqf= } 0&qr GoA4f3
3G.5724, public void splitterStop() Qy<[7 { IDkWGh bStop = true; /27JevE } {Q+gZcu bCref$| QK0h6CX } vS\%3A4^+5 TG}*5Z` 0TfS=scT /* tz#gClo **FileAccess.java mRB *//文件访问(定位,写) xe7O/',pa= package NetFox; FMkOo2{ import java.io.*; >fH=DOz$& D:k3"
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public class FileAccessI implements Serializable{ `cPywn@uGZ REZJ}%}/ //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 S3L~~X/= RandomAccessFile oSavedFile; d(g^M1m long nPos; F+ E|r6'i *f,DhT/P J]m{b09F public FileAccessI() throws IOException z0|&W&&D { O+%WR this("",0); W@yJAQ } c/B'jPt 66^ycZCH &1+X\c+tb public FileAccessI(String sName,long nPos) throws IOException
'9c2Q/ { jiF?fX@ oSavedFile = new RandomAccessFile(sName,"rw"); U4 13?Pe
this.nPos = nPos; 'J,T{s1J oSavedFile.seek(nPos); !61Pl/uQ } !LkWzn3 PW3GL3+ ypJ". public synchronized int write(byte[] b,int nStart,int nLen) p>_;^&>& { Vy_2 . int n = -1; JG9` h# try{ VmzbZTup oSavedFile.write(b,nStart,nLen); 5{n*"88 n = nLen; 5K|"\ } Ed9Z9 catch(IOException e) }I@L}f5N { )DYI
. e.printStackTrace (); "t^URp3 } hJzxbr
< <hwy*uBrD a0Ik`8^` return n; O?<&+(uMTT } _EF&A-kX|u Oy 2+b1{ j5
g# M } + >cBVx6 bzdb|I6Z 0i8LWX_M /* ^
wY[3"{ **SiteInfoBean.java <>m }}^ */ !QDQ_ package NetFox; 7\ nf:.
9CCkqB/ )5|I_PXB public class SiteInfoBean { ='TE,et@d 6sa"O89 ~G27;Npy private String sSiteURL; //Site's URL Z}|(FRVk private String sFilePath; //Saved File's Path %*#n d private String sFileName; //Saved File's Name ;<0LXYL; private int nSplitter; //Count of Splited Downloading File >5Wlc$bc SZJ$w-<z z<.?x%4O public SiteInfoBean() Mwgu93? {//nSplitter的缺省值为5 lo'W1p //default value of nSplitter is 5 q5>v'ZSo this("","","",5); F@R1:M9* } 3s"0SLS4 PvGDTYcKp Jvun?J
m public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) tDr#H!2
3 { WcC?8X2 sSiteURL= sURL; JWA@+u*k sFilePath = sPath; `# sTmC) sFileName = sName; F4Y@
B this.nSplitter = nSpiltter; %T7nO %p 5s{ABJ\@V 0euuT@_$ } 5MzFUv0) uUKcB: v=('{/^~> public String getSSiteURL() 8p-=&cuo\@ { H5D*|42 return sSiteURL; -48vJR*tC } pIbdN/z wO2_DyMm@ nYbhy}y public void setSSiteURL(String value) aTf`BG{kw { "T H6o:x sSiteURL = value; Bo5ZZY } 8( btZt z"*/mP2 7z~_/mAI public String getSFilePath() -R{V- { y1=NF return sFilePath; c*UvYzDZL } qH['09/F6 `Y?87f:SP <, 3ROo76 public void setSFilePath(String value) c^`]`xiX { %7O?JI[ sFilePath = value; uIU5.\"s } ki>~H!zB #2iD'>bQ wp7!>%s{ public String getSFileName() xUfbW;;]UU { V]EtwA return sFileName; 5s?Hxn } _{jjgQJ5 "`asFg 1He{v# public void setSFileName(String value) @AYRiOodi { J~(Wf%jM~ sFileName = value; 7^T^($+6s& } zS]8V?` 7)%+=@ 67y Tvr@a public int getNSplitter() US { hQNe;R5 return nSplitter; ;l}- Z@! / } ;O<9|? gl&5l1& h~wi6^{&Y public void setNSplitter(int nCount) 5{$LsL { OxGE%R, nSplitter = nCount; X>?b#Eva } n&A'C\ } ^T~gEv q64k7<C, -l}IZY /* /s];{m|>
**Utility.java >&!RWH9*q */ vy,&N^P package NetFox; Bvt@X ;60.l! R/`q/0T. public class Utility { }KhjlPhx bqQq=SO [yj).*0 public Utility() u{z``] { ` ]Ppau 0P>OJYFr' pWu LfX } 34!dYr% 2DD:~Tbi //线程睡眠 Nm):9YQ/ public static void sleep(int nSecond) 1N2,mo?2 { _Jv
9F8v try{ &Z?ut*%S Thread.sleep(nSecond); 6oSQQhge } c%*($)# catch(Exception e) l^J75$7 { OGiV{9U e.printStackTrace (); 8P:
Rg%0) } *Ei|fe$sa } 0q\7C[R_ `"@ X.}\ //日志 ~ d^<_R public static void log(String sMsg) ;6
+}z~ { .Wi{lt System.err.println(sMsg); {G*A.$-d } >u%]6_[ PCn Q_A-Q PM":Vd/ public static void log(int sMsg) a{Esw` { ;IK[Y{W/ System.err.println(sMsg); Jx#k,Z4 } . |*f!w}5 } }bU8G ' )EyI0R] 5 T!W~n
ZC /* sS
TPMh **TestMethod.java aAu>Tn86D. */ 8vk..!7n} package NetFox; ,7,g%?_P MzIq"3 e4OeoQ@ > public class TestMethod { _ .i3,-l) >\ST-7[^L VGL#!4wK public TestMethod() ~"Gf<3^y+ { ///xx/weblogic60b2_win.exe d7Ur$K\=y try{ 1xf=_F0`& SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); \n0Oez0z!B //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); A~nf#(!^] SiteFileFetch fileFetch = new SiteFileFetch(bean); 56hA]O29O fileFetch.start(); NvjJb-u } ?t@v&s catch(Exception e){e.printStackTrace ();} h;lirvO| W\f9jfD avp;*G} } ydv3owN 7nzGAz_W M9!AIHq4 public static void main(String[] args) a:YI"*S
{ !2:3MbtR new TestMethod(); iAMtejw } 6{d6s#|% } U-wLt(Y< 点击下载更多相关资料
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