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/* zZ-e2)1v **SiteFileFetch.java @uY%;%Pa8 */ g;]2'Rj package NetFox; aDza"Ln import java.io.*; 94nvh:n import java.net.*; Xg!Mc<wA[ >YoK?e6 u#=N8 public class SiteFileFetch extends Thread { IRo[|&c Vzbl*Zmx `p1`Sxz? SiteInfoBean siteInfoBean = null; //文件信息Bean Y/Y746I long[] nStartPos; //开始位置 lt0(Kf g long[] nEndPos; //结束位置 i8HSYA FileSplitterFetch[] fileSplitterFetch; //子线程对象 ~,':PUkiV long nFileLength; //文件长度 %I Y-0\ boolean bFirst = true; //是否第一次取文件 &B3\;|\ boolean bStop = false; //停止标志 [+GQ3Z\ File tmpFile; //文件下载的临时信息 T_AZCl4d DataOutputStream output; //输出到文件的输出流 k~=-o>}C |BYD] vK //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) SCxzT}#J public SiteFileFetch(SiteInfoBean bean) throws IOException <;9vwSH> { b@,=;Y)O siteInfoBean = bean; `q_7rrkO //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); _IpW& tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); (2qo9j"j/Y if(tmpFile.exists ()) HTx7._b { ]]%C\Ryy} bFirst = false; 0TA/ExJ-LT read_nPos(); !2&h=;i~V }
k7y!!AV else 62vz 'b { JI\u -+BE nStartPos = new long[bean.getNSplitter()]; sMO3eNLn nEndPos = new long[bean.getNSplitter()]; _\o +9X! } XyhOd$) B)^]V<l(w $ a5K &5d>jEaB} } kf5921(P >!WJ{M0 ZTS*E,U% public void run() Ti' GSL { :l9C7o //获得文件长度 yY_]YeeR //分割文件 =~aJ]T}( //实例FileSplitterFetch u4+VG5.rhT //启动FileSplitterFetch线程 cVulJ6 //等待子线程返回 ^O892 -R try{ /[EI0~P if(bFirst) `VBjH]$ { .WG@"2z| nFileLength = getFileSize(); >656if O if(nFileLength == -1) o_G.J4 V { T,?^J-h^ System.err.println("File Length is not known!"); ',1rW } xOu
cZ+ else if(nFileLength == -2) 89 (k<m { 7?hCt System.err.println("File is not access!"); ?on3z } b$gDFNa else Uc9Uj { 6K<vyr40 for(int i=0;i<nStartPos.length;i++) =ARI* { #),QWTl3 nStartPos = (long)(i*(nFileLength/nStartPos.length)); 'Y"q=@Ei9 } vkR"A\: for(int i=0;i<nEndPos.length-1;i++) g?@(+\W { *4(.=k nEndPos = nStartPos[i+1]; {h@R\bU } ruE.0V I@ nEndPos[nEndPos.length-1] = nFileLength; )O7 Mfr } msoE8YK&tg } uNx3us- Za01z^ yr;oq(&N //启动子线程 Z)?"pBv' fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; fwl
RwH( for(int i=0;i<nStartPos.length;i++) E|^a7-}| { ZGp8$Y>r fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), ~KX!i
8+X siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), }Rt<^oya* nStartPos,nEndPos,i); s}HTxY; Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); 8o4
vA, fileSplitterFetch.start(); v.Q)Obyn } TAGqRYgi // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), &_-~kU1K^ siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); >)VrbPRuA
// Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", 2&Efqy8}DZ nEndPos = " + nFileLength); ?^@;8m // fileSplitterFetch[nPos.length-1].start(); s'K0C8'U +"d{P,[3J I.(
9{ //等待子线程结束 =RQ>q //int count = 0; K):)bL(B //是否结束while循环 7tt&/k?Q boolean breakWhile = false; e1'_] rP>5OLP ^Nc\D7( l while(!bStop) xwz2N5 { &t6L8[#yd write_nPos(); _ :][{W# Utility.sleep(500); `#l_`j=r$ breakWhile = true; -EL"Sv? ]*v%(IGK pWQ?pTh for(int i=0;i<nStartPos.length;i++) q=6M3OnS> { ~w!<J-z) if(!fileSplitterFetch.bDownOver) Cjwg1?^RZ { g4~{#P^i breakWhile = false; :/1WJG:! break; Q04N } g/T`4"p[H } +i
K.+B if(breakWhile) t(s']r break; 5$9j&&R Pu}2%P)p `[`eg<xj //count++; b9"Q.*c<Z^ //if(count>4) jI y'mGaG // siteStop(); Q4Cw{2r } G2e m>W_n "\e9Y< *VL-b8'A< System.err.println("文件下载结束!"); TT29LC@ } %3~jg catch(Exception e){e.printStackTrace ();} _\u'~wWl } :@n e29,} 6rR}qV,+{ -1U]@s //获得文件长度 1 "4AS_Q public long getFileSize() 2.2 s>?\ { |qZ4h7wL int nFileLength = -1; $@DXS~UQA try{
!$&K~>` URL url = new URL(siteInfoBean.getSSiteURL()); U?.VY@ HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); n.Ekpq\ httpConnection.setRequestProperty("User-Agent","NetFox"); ,@GI3bl jagsV'o2 =G*<WcR int responseCode=httpConnection.getResponseCode(); m}8c.OJ>K` if(responseCode>=400) ! 5 ]/2 { ]Wfnpqc^ processErrorCode(responseCode); hGzj}t
W8d return -2; //-2 represent access is error 0naegy?, } l$z-' C
!uwD a N_M String sHeader; ,Y}HP3
.,feRK>3 &Tl3\T0D for(int i=1;;i++) ;B!&( 50e { [{'` | //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); +AXui|mn //Utility.log(in.readLine()); +jQW 6k# sHeader=httpConnection.getHeaderFieldKey(i); @0+@.&Z if(sHeader!=null) 3M/kfy { k`xPf\^tf if(sHeader.equals("Content-Length")) Dy0RZF4_ { i?||R|>;"' nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); joYj`K break; 7)<&,BWc }
NouT~K`' } 1[mX_ }K else v-g2k_o| break; `Y8F}%i[ } q,kdr)- } yA=#Ji catch(IOException e){e.printStackTrace ();} rr9N(AoxW catch(Exception e){e.printStackTrace ();} KN_3]-+B U H
`= a$"3T Utility.log(nFileLength); w8$8P qK,rT*5= zGA1 return nFileLength; 8,=,'gFO } #sN]6 #8rLB( >pUR>?t" //保存下载信息(文件指针位置) CKy' 8I9 private void write_nPos() =`99ez+y { FL9Dz4 try{ 2I>X]r.S!1 output = new DataOutputStream(new FileOutputStream(tmpFile)); MBp%TX! output.writeInt(nStartPos.length); "! m6U#^ for(int i=0;i<nStartPos.length;i++) $CRu?WUS]' { 9x23## s // output.writeLong(nPos); xrf z-"n4 output.writeLong(fileSplitterFetch.nStartPos); S sGb; output.writeLong(fileSplitterFetch.nEndPos); 6|| zfH } /*i[MB output.close(); ?s6v>#H% } u{o3 catch(IOException e){e.printStackTrace ();} &M&*3 catch(Exception e){e.printStackTrace ();} RG0kOw0 } -LhO
</l #;z;8q ACc tyGd //读取保存的下载信息(文件指针位置) O,x[6P54P private void read_nPos() e?,n> { xG/B$DLn try{ `zwXfY,% DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); kZ>_m&g int nCount = input.readInt(); X @RS
/ nStartPos = new long[nCount]; [+
Kjun_ nEndPos = new long[nCount]; ,K
8R%B for(int i=0;i<nStartPos.length;i++) 2Jo|]>nl}u { kNR -eG nStartPos = input.readLong(); Qzt'ZK nEndPos = input.readLong(); ~}pc&jz>q } _Dr9 w&;< input.close(); _(l?gj } L7;8:^ v catch(IOException e){e.printStackTrace ();} qILb># catch(Exception e){e.printStackTrace ();} C3)*Mn3%P } N:x--,2 [MhKR }a w;W# 'pE private void processErrorCode(int nErrorCode) ]l>LU2 sx { k<Qhw)M8 System.err.println("Error Code : " + nErrorCode); {bHUZen
} !K*(# [ ,sI<AFI x{4{.s%+: //停止文件下载 Bs)'Gk`1 public void siteStop() 0Un?[O { oq${}n < bStop = true; 3>M%?d for(int i=0;i<nStartPos.length;i++) 4P jC[A* fileSplitterFetch.splitterStop(); lonV_Xx :e1kpQ V^Y'!w\LGI } ,.9k)\/V } BX\/Am11 //负责部分文件的抓取 s|IY
t^ **FileSplitterFetch.java 6~c#G{kc */ 5C0![$W> package NetFox; iR?}^|] 6S`0<Z;;/ cX7 O*5C import java.io.*; ]-8WM5\qJM import java.net.*; )Zf1%h~0r I+=+ ,iXhB TZ&X0x8 public class FileSplitterFetch extends Thread { CRBj> TyDh\f!w 3xg9D.A String sURL; //File URL qv& Bai[ long nStartPos; //File Snippet Start Position Q2/65$nW long nEndPos; //File Snippet End Position /sfJ:KP0 int nThreadID; //Thread's ID $Nd,6w*` boolean bDownOver = false; //Downing is over sSd/\Ap boolean bStop = false; //Stop identical w4(L@1 FileAccessI fileAccessI = null; //File Access interface nr2 Q[9~ _Jy7` 4B. F~q(@.b public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException
N=AHS { Kv<f<>|L this.sURL = sURL; pO_IUkt this.nStartPos = nStart; }}"pQ!Z this.nEndPos = nEnd; GLgf%A`5/_ nThreadID = id; G4uG" fileAccessI = new FileAccessI(sName,nStartPos);//定位 |lt]9>| } ,AmwsXN"F )/?H]o$NU d]poUN~x public void run() h5SJVa { dgL>7X=7 while(nStartPos < nEndPos && !bStop) D/?Ec\t { NMe{1RM +$|fUn{ W:,Wex^9n try{ K>dB{w#gS URL url = new URL(sURL); om`T/@_, HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); N0H=;CIQ httpConnection.setRequestProperty("User-Agent","NetFox"); V"m S$MN String sProperty = "bytes="+nStartPos+"-"; ^|H={pd'c0 httpConnection.setRequestProperty("RANGE",sProperty); #l ZK_N|1x Utility.log(sProperty); w9{C"K?u= fqhL"Ah
+x(#e'6p InputStream input = httpConnection.getInputStream(); R*:>h8 //logResponseHead(httpConnection); V:$+$"| RN[I%^$" =e4 r=I byte[] b = new byte[1024]; |~r-VV(= int nRead; AH|gI2 while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) s'h;a5Q1'Q { =hkYQq`Q nStartPos += fileAccessI.write(b,0,nRead); } vmRm*8z //if(nThreadID == 1) |RFBhB/u // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); ;eN
^'/4A } &W,jR|B
&'SD1m1P K#YQB3rX Utility.log("Thread " + nThreadID + " is over!"); PVsKI< bDownOver = true; #,%7tXOLR //nPos = fileAccessI.write (b,0,nRead); R|C2O[r} } s{-gsSmE catch(Exception e){e.printStackTrace ();} MF8-q'upyT } e"ehH#i } =5q<_as d=/0A\O J0?kEr //打印回应的头信息 X*QS/\ public void logResponseHead(HttpURLConnection con) P(hGkY=( { X_]rtG for(int i=1;;i++) BH">#&j[ { &3BoK/y3 String header=con.getHeaderFieldKey(i); |'q%9# if(header!=null) >#w;67he2 //responseHeaders.put(header,httpConnection.getHeaderField(header)); ZEAUoC1E1 Utility.log(header+" : "+con.getHeaderField(header)); SVZocTt else v1TFzcHl< break; Ho>Np& } xWxc1tT` } 9 3>4n\ Qc; kj x@t?7 o\& public void splitterStop() z3Q&O$5\ { 2yZr!Rb~* bStop = true; "f,{d}u } "2l`XH @1MnJP )S
caT1I } p+;& Gg54 %{@Q7 98>GHl'lM /* zaqX};b **FileAccess.java xG9Sk *//文件访问(定位,写) 6qWUo3 package NetFox; wI$a1H import java.io.*; {FNkPX 0NXH449I= \84t\jKR public class FileAccessI implements Serializable{ 9;E=w+ q,vWu(. //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 ;-+q*@sa] RandomAccessFile oSavedFile; or/gx 3 long nPos; zx3gz7>k; ^7-zwl(>?N CL|/I:%0 public FileAccessI() throws IOException c$O8Rhx { Y;"k5+ q this("",0); X@rA2);6 } *l+#<5x ^"WVE[" 0!T`.UMI public FileAccessI(String sName,long nPos) throws IOException YmziHns`b { b:m+I
oSavedFile = new RandomAccessFile(sName,"rw"); [nTI\17iA this.nPos = nPos; GJ+ ^t oSavedFile.seek(nPos); K3T.l#d'L } 6l#x1o; 8xAV[i Mo,&h?VOM? public synchronized int write(byte[] b,int nStart,int nLen) U1[)e D` { M:S-%aQ_<y int n = -1; \N,ox(f?gW try{ 9)Fx;GxL oSavedFile.write(b,nStart,nLen); t|aV:x n = nLen; Nep4J; } &X=7b@r catch(IOException e) CXa[%{[n { eb62(:=N6 e.printStackTrace (); ?=VvFfv% } (_T{Z>C/J A,}M ^$@ o).deP
s- return n; B5b:znW2@ } %6UF%dbYH` '7Gv_G_ h051Ol\v* } I;(3)^QH# at: li /*K2i5&X /* # B `?}a= **SiteInfoBean.java ;_o]$hV| */ ekM?
'9ez package NetFox; qt/K$' "-J5!y*,Y 4&/CES public class SiteInfoBean { d#k(>+%=Q #Y'eS'lv4 U!wi;W2 private String sSiteURL; //Site's URL wP!X)p\ private String sFilePath; //Saved File's Path 3/G^V'Yu private String sFileName; //Saved File's Name bsIG1&n'T private int nSplitter; //Count of Splited Downloading File p_FM 2K7! nhV"V`|d RBX<>* public SiteInfoBean() .E4*>@M5 {//nSplitter的缺省值为5 E5k)~P`| //default value of nSplitter is 5 k]b*&.EY1 this("","","",5); TdtV ( } swKkY`g +vBi7#& Y
G+|r public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) Q;M\fBQO}& { \Wbmmd}8 sSiteURL= sURL; TT$Ao sFilePath = sPath; ys[Li.s: sFileName = sName; }F`|_8L*v) this.nSplitter = nSpiltter; oMh$:jR $ odRiCiMH 6Rc=!_v^ } Knq9"k K1&
QAXyP / f%mYL public String getSSiteURL() yI0bSu<j- { 55[ 4)* return sSiteURL; t@q'm.:uw< } +H)'(< YeH!v, > 7_0p& 3
public void setSSiteURL(String value) |)-kUu { j8Z, :op sSiteURL = value; k+<945kC } ^^y eC|~N: fgLjF,Y \}j MC public String getSFilePath() _fAgp_) { Z8$}Rpo return sFilePath; n 8cA8< } %@$UIO,( 0I}e>]:I 'B@`gA public void setSFilePath(String value) m[hL
GD'Fi { %!aU{E|@_ sFilePath = value; oA1_W).wJ } rfXxg^ ys_2?uv Nw;qJ58@ public String getSFileName() 0|3I^b { &|yLTx return sFileName; 7& M-^Ev } {#,<)wFV\ }^"6 :;, .;#T<S" public void setSFileName(String value) q=1 NRG { uuzV,q sFileName = value; N& _~y| } Z6!Up1 B#sCB&( )6|L]'dsZ public int getNSplitter() N Ob`)qb { "oP^2|${ return nSplitter; z;OYPGvkw } Rr) 5[ +WX/4_STV }gp@0ri%5 public void setNSplitter(int nCount) B(Sy.n { [&x9<f6 nSplitter = nCount; `lhw*{3A } 8K%N7RL| } G0FzXtu)q %mI0*YRma 'yo@5*x7 /* FX:`7c]:9 **Utility.java
#]#9Xq */ x*7@b8J package NetFox; Q>niJ'7WF i'tMpS3 !MbzFs~ public class Utility { [%W'd9`> 86&M Zdv6 KK|w30\f public Utility() 1wSAwpz { NvK9L.K EF/d7 {X{R] } z^Hc'oVXj: 0<M-asI? //线程睡眠 W.wPy@yi public static void sleep(int nSecond) q0sf\|'<} { dFg>uo try{ tV}!_ Thread.sleep(nSecond); h~dQ5% } #w$Y1bjn catch(Exception e) {Jr1K, { &L|oqXE0L e.printStackTrace (); q'3{M]Tk } -4Qub{Uym } -V$|t< jNZ.Fb //日志 )u?f| D public static void log(String sMsg) 4pmeu:26 { =lacfPS System.err.println(sMsg); U,GSWMI/K } zzmC[,u} _,3ljf?WQM bG;fwgAr public static void log(int sMsg) Vax g { !-I,Dh-A System.err.println(sMsg); DE13x*2 } I8#2+$Be+@ } w,|@e_|J ns[/M~_r 5eAZfe%H /* UmKE]1Yw4r **TestMethod.java SmXJQ@jN */ 7?lz$.*Avp package NetFox; Bk8}K=%w <JPN<
Kv i4D(8; public class TestMethod { bpu`'Vx 1(' wg! 7UTfafOGX public TestMethod() 5Ds[? { ///xx/weblogic60b2_win.exe [@$ SLl^Y try{ ]:%DDlRb SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); ?G{0{c2 //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); >t+ ENYb SiteFileFetch fileFetch = new SiteFileFetch(bean); &61U1"&$ R fileFetch.start(); lZzW-
%K } )@]%:m!ER catch(Exception e){e.printStackTrace ();} m\teE]8x "O$bq::(]e G?4@[m } O]: 9va =4TQ*;V: $v>q'8d public static void main(String[] args) M1jT+ { :s)cTq| 3 new TestMethod(); If'q8G3]- } }:$cK(| } ?;~!C2Zs 点击下载更多相关资料
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