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/* -J &y]' **SiteFileFetch.java CZZwBt$P */ gI~B _0x package NetFox; a=_+8RyVQ import java.io.*; =1#obB import java.net.*; ,L_u
X <8)cr0~zy> <cm(QNdcC public class SiteFileFetch extends Thread { ~dXiyU,y2 2P,%}Ms 'Nkd * SiteInfoBean siteInfoBean = null; //文件信息Bean m3#rU%Wj long[] nStartPos; //开始位置 ~#MXhhqB long[] nEndPos; //结束位置 ]C'^&:&< FileSplitterFetch[] fileSplitterFetch; //子线程对象 Phq"A[4=O long nFileLength; //文件长度 Q6PaT@gs boolean bFirst = true; //是否第一次取文件 Kj53"eW boolean bStop = false; //停止标志 <>v=jH|L File tmpFile; //文件下载的临时信息 q!;u4J DataOutputStream output; //输出到文件的输出流 ~n=oPm$pR 1S+lHG92I //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) >\?RYy,s$ public SiteFileFetch(SiteInfoBean bean) throws IOException G!)Q"+ { f/95}6M siteInfoBean = bean; gWD46+A){ //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); P(%^J6[> tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); 1SF8D`3 if(tmpFile.exists ()) m)l'i!Y { v\lKY*@f bFirst = false; 3*zywcTH read_nPos(); KwHlpW* } V_3K((P6 else sTS/]"l { XEBeoOX/ nStartPos = new long[bean.getNSplitter()]; @?JFqwq! nEndPos = new long[bean.getNSplitter()]; yGY:EvH^? } <KX fh &g"`J` ,!H`@Kl 4L bll%[9 } r$:hiE@ `mthzc3W qizQt]l public void run() 5?Ukf$)x { a>Wr2gPko //获得文件长度 *C);IdhK%y //分割文件 Wl7S<>hg4 //实例FileSplitterFetch :K~sazs7J //启动FileSplitterFetch线程 2>[xe //等待子线程返回 v|MT^. try{ 7|xu)zYB if(bFirst) 4T]A!
y{
{ fK _uuw4 nFileLength = getFileSize(); ~/qBOeU3 if(nFileLength == -1) aoQ$"PF9 { :='I>Gn System.err.println("File Length is not known!"); $>7T s>8 } )5NWUuH 5 else if(nFileLength == -2) ik](k"1{ { f/QwXO-U System.err.println("File is not access!"); ^T#jBqe } W&k@p9 else S17;;w0 { \ Q^grX for(int i=0;i<nStartPos.length;i++) 0(>3L : { )HcLpoEi nStartPos = (long)(i*(nFileLength/nStartPos.length)); FTr'I82m( } `-JVz{z for(int i=0;i<nEndPos.length-1;i++) UfIr"bU6 { \a4X},h\ nEndPos = nStartPos[i+1]; $;&l{=e2) } D|amKW7 nEndPos[nEndPos.length-1] = nFileLength; z9!OzGtIR } / ykc`E?f } -u7NBtgUh qRR%aJ/ dBwoAq`' //启动子线程 +v~x_E5FP fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; bU[_YuJbM for(int i=0;i<nStartPos.length;i++) d}%-vm} 0 { ftKL#9,s( fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), Dlpmm2 siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), G3 |x%/Fbp nStartPos,nEndPos,i); ,!, tU7-H Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); `kE7PXqa fileSplitterFetch.start(); w+r).PS}C } KnKf8c // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), bT6VxbNS siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); u0]u"T&N! // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", R={#V8D~ nEndPos = " + nFileLength); *VmX. // fileSplitterFetch[nPos.length-1].start(); PD^G$LT IMncl=1 4AKr.a0q //等待子线程结束 9 *uK]/c //int count = 0; 93Zij<bH?e //是否结束while循环 mP=[h
|a$r boolean breakWhile = false; xXc>YTK' rd<43 ZyDNtX% while(!bStop) o='A1 P { Faa>bc~E write_nPos(); e(N},s:_ Utility.sleep(500); OR*JWW[] breakWhile = true; vcsSi%M\U hv?T}E '6})L for(int i=0;i<nStartPos.length;i++) YU" /p|!1 { -8Hc M\b if(!fileSplitterFetch.bDownOver) a5R.
\a<q { Y 9|!=T% breakWhile = false; l
S3LX break; "\O7_od- } BWvM~no } z HvE_- if(breakWhile) w/O'&],x break; ;[UI]?A% j7MUA#6$ $,J}w%A //count++; |(ab0b # //if(count>4) [k>{q+MWK // siteStop(); H8I)D& cw }
?ueL'4Mm j6EF0/_|e *;9H \% System.err.println("文件下载结束!"); [5p 3:D } ;y. ;U#O catch(Exception e){e.printStackTrace ();} l?2 } pi~5}bF!a P8}IDQ9 Z{BK@Q4z //获得文件长度 gm2|`^Xq$ public long getFileSize() ]7cciob { =
g
& int nFileLength = -1; Pg8boN]} try{ O|+ZEBP URL url = new URL(siteInfoBean.getSSiteURL()); -&`_bf%M HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); )I3E httpConnection.setRequestProperty("User-Agent","NetFox"); /KWdIP# ?wPTe^Qtv i8k} B
o int responseCode=httpConnection.getResponseCode(); u-|%K.A if(responseCode>=400)
gk 6R# { n]Yz<# processErrorCode(responseCode); i_Q1\_m ! return -2; //-2 represent access is error ~EY)c~H } &WBpd}|+Y )L6
it S$hxR String sHeader; 1Z)P.9c #*.4Jv<R lqv}~MC for(int i=1;;i++) Q2Ey RFT { ?OF$J|h //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); eA2*}"W //Utility.log(in.readLine()); 9)]`le sHeader=httpConnection.getHeaderFieldKey(i); eA(\#+)X ` if(sHeader!=null) Ncbe{}<md { O0z-jZ,]) if(sHeader.equals("Content-Length")) NR(rr. { USN'-Ah nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); @xBb|/I break; #&IrCq+ } NAE|iyw } XchD3p+uB else D*~Q;q> break; Zy3F%]V0 } `Zo5!"' } jrN 5l1np catch(IOException e){e.printStackTrace ();} #e-7LmO~ catch(Exception e){e.printStackTrace ();} c^1JSGv OfBWf6b aC1 xt( Utility.log(nFileLength); 89D`!`Ah] 3{co.+ rwUhNth-Qh return nFileLength; ^0>^5l'n } T+P{,,a/] uGXvP(Pg' SGZYDxFC@ //保存下载信息(文件指针位置) EJC}"%h private void write_nPos() um]*nXIr { rjcH[U( try{ XS@iu,uO output = new DataOutputStream(new FileOutputStream(tmpFile)); ?:60lCqj output.writeInt(nStartPos.length); 2BO H8Mp9 for(int i=0;i<nStartPos.length;i++) gsQn@(; { [7DU0Xg7 // output.writeLong(nPos); W3\+51P output.writeLong(fileSplitterFetch.nStartPos);
A ;`[va output.writeLong(fileSplitterFetch.nEndPos); M_E$w$l2< } XU}i<5 output.close(); \)\n5F:Zu }
!vl1#@ catch(IOException e){e.printStackTrace ();} bupW*fD: catch(Exception e){e.printStackTrace ();} sOWP0xY } wd|^m% 5?>Q[a.Ne "N%W5[C{ //读取保存的下载信息(文件指针位置) j^ 8Hjg private void read_nPos() 7SkW!5 { N/{=j try{ MJe/ \ DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); cqh1,h$sG int nCount = input.readInt(); =u9e5n nStartPos = new long[nCount]; U/q"F<?.c nEndPos = new long[nCount]; $?kTS1I( for(int i=0;i<nStartPos.length;i++) P!9-!+F" { Ve[Kv07 nStartPos = input.readLong(); :X9;KoJl-V nEndPos = input.readLong(); GPs4:CIgG } Rb
b[N#p5 input.close(); u5qaLHoEP } su\Lxv
catch(IOException e){e.printStackTrace ();} Aj\m57e,6 catch(Exception e){e.printStackTrace ();} Qx EmuiN } O&.gc p! uKIR$n" iN
u k5 private void processErrorCode(int nErrorCode) <4?(|Vh[m] { ;erxB6* System.err.println("Error Code : " + nErrorCode); yP@#1KLa+ } YL;*%XmAG =}0>S3a.7 = "Lb5! //停止文件下载 Jn?ZJZ public void siteStop() ezJ^
r,D| { }236{)DuN bStop = true; Pa\yp?({q for(int i=0;i<nStartPos.length;i++) G7-.d/8|^ fileSplitterFetch.splitterStop(); W}(xE?9& xWQQX M _Lj5` } W7V#G(cpU } sDHFZ:W //负责部分文件的抓取 `kOp9(Q{ **FileSplitterFetch.java i}:^<jDv? */ ,+n{xI2 package NetFox; 5iItgVTW = p2AK\ C0e oV} import java.io.*; :VRQd}$Pi import java.net.*; Q;2kbVWY J0@#xw=+ ,tFLx#e# public class FileSplitterFetch extends Thread { GV)DLHiyxX N':d
T c&L|e$C] String sURL; //File URL >?X(,c long nStartPos; //File Snippet Start Position b Oh[(O! long nEndPos; //File Snippet End Position U3>ES"N int nThreadID; //Thread's ID d{'u97GDc boolean bDownOver = false; //Downing is over gWjz3ob boolean bStop = false; //Stop identical 5Obv/C FileAccessI fileAccessI = null; //File Access interface \xZ6+xZd1 t_X=x`f F,GG>(6c public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException QbAEWm { UD]RWN this.sURL = sURL; h5H#xoCXp this.nStartPos = nStart; 98l- this.nEndPos = nEnd; 2;ogkPv ' nThreadID = id; W2,Uw1\:1 fileAccessI = new FileAccessI(sName,nStartPos);//定位 +^aM(4K\ } @F5QgO J&r ?0+J"FH# W ?B4X&xf.D public void run() Fmrl*tr { H]f8W]"c[ while(nStartPos < nEndPos && !bStop) M059"X=" {
-S}^b6WL
pe`&zI_`? ^w}BXVn try{ 4L6'4 t"s URL url = new URL(sURL); 9fqCE619a HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); z"@UNypc, httpConnection.setRequestProperty("User-Agent","NetFox"); 8nRxx`U\q String sProperty = "bytes="+nStartPos+"-"; r?n3v[B httpConnection.setRequestProperty("RANGE",sProperty); *3Ci4\Ew Utility.log(sProperty); @z.HyQ_v 0R?LWm
j ,#=;V"~9 InputStream input = httpConnection.getInputStream(); 2`/p V0 //logResponseHead(httpConnection); EtvYIfemr ^pa -2Ao6 K06&.>v_ byte[] b = new byte[1024]; Q|HOy8O}Z int nRead; &f>1/"lnd\ while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) KA0_uty/T { uQg&A`4 nStartPos += fileAccessI.write(b,0,nRead); cLnvb!g'# //if(nThreadID == 1) h)C`w'L // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); OOX}S1lA } Q pbzx/2h Wp$'#HhB 3HmJixy Utility.log("Thread " + nThreadID + " is over!"); SE!0f& bDownOver = true; *e-+~/9~ //nPos = fileAccessI.write (b,0,nRead); VbzW4J_ } Jyu*{ catch(Exception e){e.printStackTrace ();} UzmD2AsO" } pSJc.j } a<`s'N1G k39;7J &!FWo@ //打印回应的头信息 ?wS/KEl=O public void logResponseHead(HttpURLConnection con) q]o^Y { (
u}tUv3 for(int i=1;;i++) tqe8:\1yK { a)Ca:p String header=con.getHeaderFieldKey(i); B mxBbg if(header!=null) APu cA //responseHeaders.put(header,httpConnection.getHeaderField(header)); yY42+%P Utility.log(header+" : "+con.getHeaderField(header)); |nj,]pA else h/n&&J break; >)PcK } 7vs>PV } dg]: JU rYMHc@a9( +gOv5Eno- public void splitterStop() VlQaT7Q { n~NOqvT < bStop = true; a5xp[TlXn. } `[Xff24(eb A5> ,e| /"<o""<] } zcNv T ta 66AEc9 PxHHh{y%c /* Os-sYaW **FileAccess.java H|0GRjC *//文件访问(定位,写) nE3'm[) package NetFox; S20L@e"U import java.io.*; @eGJ_ J 2U;ImC1g 4U;6 2 jq public class FileAccessI implements Serializable{ |H'4];>R? )tyhf(p6 //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 wd`lN,WiW RandomAccessFile oSavedFile; !4f0VQI long nPos; 3o=K?eOdg pkL&j<{ Yw\PmRL"p public FileAccessI() throws IOException fc#zhp5bX { &u'$q
this("",0); f 6h!wx } [nam H a ZsPT!l, t:G67^<3 public FileAccessI(String sName,long nPos) throws IOException C"P40VQoo { BM&.Tw|x oSavedFile = new RandomAccessFile(sName,"rw"); @;we4G5 this.nPos = nPos; Sp=6%3fZ]m oSavedFile.seek(nPos); [l2ds: } &O5W @sAT#[j crt
)}L8- public synchronized int write(byte[] b,int nStart,int nLen) Ok=RhoZZ { CN$wlhs int n = -1; ljij/ C= try{ DhwFD8tT oSavedFile.write(b,nStart,nLen); U]Vu8$W n = nLen; <y}`PmIM I } Qf|=xV,F catch(IOException e) /{';\?w { Tc DkKa e.printStackTrace (); 8_S<zE`Ha } 0OndSa, <4{,u1!t L"akV,w4p return n; 2?9SM@nAY } EVW{!\8[ JEK6Ms;)A w}<CH3cx } ^f-?xXPx #mNM5(o i%8I (F /* w>:~Ev] **SiteInfoBean.java k#I4^ */ S&A, Q' package NetFox; Xq9n-;%zL 4{h?!Z* El~x$X* public class SiteInfoBean { F8J;L](Dq 8v},&rhPQq \o-Q9V private String sSiteURL; //Site's URL 1Y"[Qs]"mU private String sFilePath; //Saved File's Path a3wTcp "r private String sFileName; //Saved File's Name ^gwVh~j private int nSplitter; //Count of Splited Downloading File ]}_@!F) J?WT Z^w}: { public SiteInfoBean() Rl7V~dUY {//nSplitter的缺省值为5 +)#d+@- //default value of nSplitter is 5 P~V0<$C this("","","",5); m/)Wn } }vRs n-E@ >bia
FK>t xHv<pza: public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) .D^=vuxt~ { 7(m4,l+( sSiteURL= sURL; Vj7(6'Hg sFilePath = sPath; dF2 &{D"J sFileName = sName; ]bG8DEwD this.nSplitter = nSpiltter; ^FJ=/ #@T ;&Q8xC2 P#/k5]g } ]o<'T.x }b-"[TDEF N:j"W,8 public String getSSiteURL() rzH*| B0g { 5eI3a!E]O return sSiteURL; e7f3dqn0 } E?o1&(2p 28u)q2s^W| M^\#(0^2@ public void setSSiteURL(String value) Vd2bG4*= { fZ2>%IxG} sSiteURL = value; P;D)5yP092 } X'4g\)* / c1=`OJ Fi+v:L| public String getSFilePath() A2{u("^[6 { #>+O=YO return sFilePath; - Dm/7Sxd` } 7q>WO HhN;&67~Z .'md `@t public void setSFilePath(String value) x:W nF62 { Bb^CukS: sFilePath = value; C0o0
l> } <0OZ9?,dm F6*n,[5( yUF<qB public String getSFileName() -s`/5kD { CQf!< return sFileName; nPp\IE}: } ^EGe%Fq*x] P9~7GFas| =W(mZ#*vdY public void setSFileName(String value) ^2L\Y2 { 9Xb,Swo~ sFileName = value; <]6])f,y\ } ,E{z+:Es RF/I*5 z; 6Tp public int getNSplitter() ?\MvAG7Y { xc.(-g[ return nSplitter; V @A+d[ } \2(Uqf#_ nUi
4!|r 5[.Dlpa'7 public void setNSplitter(int nCount) F-?K]t# { iUl5yq nSplitter = nCount; .4c* _$ } YPQ&hEu0 } }D_h*9 ~|e?@3_G RG [*:ReB9 /* \ct) / **Utility.java @= f2\hU */ ~^((tT package NetFox; m6J7)Wp 7%C6hEP/*W <aJdm!6 public class Utility { T4,dhS| 0 1U/{D6D %~`8F\Hiu public Utility() D_oGhQYY4 { tsdkpt cd1M0z C8qA+dri } 5)fEs.r0U <[O8{9j //线程睡眠 QXZjsa_| public static void sleep(int nSecond) MP/6AAt7=| { T#'+w@Q9{9 try{ \I J\ Thread.sleep(nSecond); u_[^gS7 } /QDlm>FM4 catch(Exception e) 5$o]D { s@^(1g[w` e.printStackTrace (); f/t1@d! } 2P9gS[Ub } &WN#HI."] lhsd39NM //日志 WZq0$:I;R public static void log(String sMsg) ea-NqdGs;m { c,%9Fh?( System.err.println(sMsg); //63?s+ } jE!<]
))"J Mf)0Y~_:R# public static void log(int sMsg) 5MsE oLg { K7 >Z)21 System.err.println(sMsg); zlC|Sp af } j0b?dKd } SE=3`rVJ j+0=)Q%I= yi`Z(j; /* J
[}8&sn **TestMethod.java MNURY A= */ k,o|"9H package NetFox; CAg\-*P| l]Ozy@
Ib =KfV;.& public class TestMethod { m1DzUq; :A%|'HxH3 G0p|44_~t public TestMethod() &9bsTm { ///xx/weblogic60b2_win.exe k2Yh?OH try{ k$`~,LJ p SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); A<ca9g3 //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); D<9FSxl6 SiteFileFetch fileFetch = new SiteFileFetch(bean); q]F2bo fileFetch.start(); T1TKwU8l } g3~e#vdz catch(Exception e){e.printStackTrace ();} rZ<n0w S;DqM;Q )-$Od2u2c } 9-)D"ZhLe ycAQHY~n ]jNv}{ public static void main(String[] args) bDI#' F { bqEQP3t^ new TestMethod(); m89-rR:Kc } P/;sZo } :wiQ^ea 点击下载更多相关资料
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