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/* "?%2`*\ **SiteFileFetch.java -wa"&Q */ @yM$Et5 package NetFox; @U+#@6 import java.io.*; /|0xOiib import java.net.*; mqtX7rej ]f{3_M[ HmiG%1+{A public class SiteFileFetch extends Thread { 4mjlat(d v}LI-~M>U :
&bJMzB SiteInfoBean siteInfoBean = null; //文件信息Bean qCkC 2Fy( long[] nStartPos; //开始位置 A^ofs*"Y long[] nEndPos; //结束位置 5G2G<[p5oQ FileSplitterFetch[] fileSplitterFetch; //子线程对象 40%fOu,u` long nFileLength; //文件长度 [*C%u_h boolean bFirst = true; //是否第一次取文件 WD55( boolean bStop = false; //停止标志 x8w l File tmpFile; //文件下载的临时信息 2##;[ DataOutputStream output; //输出到文件的输出流 *8r^!(Kj `>0%Ha //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) 577#A, O public SiteFileFetch(SiteInfoBean bean) throws IOException 3n,jrX75u { cO$xT;kK siteInfoBean = bean; |k$6"dXSO //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); oN2#Jh%dH tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); xkC M*5: if(tmpFile.exists ()) /!?b&N/d) { EHy 15RL bFirst = false; D V\7KKJE read_nPos(); Mz6\T'rC } ~R&rQJJeJ else :.9Y { x<h|$$4S nStartPos = new long[bean.getNSplitter()]; '_b3m2I.G nEndPos = new long[bean.getNSplitter()]; Lk)I;; } C$p012D1 )T6:@n^]h qt(4?_J uK]-m } 5dGfO:Dy_ <2d)4@B= Pbd[gKX_ public void run() 5,-g^o7 { )DmydyQ' //获得文件长度 CBO*2?]s //分割文件 ",l6-<s //实例FileSplitterFetch !Q WNHL //启动FileSplitterFetch线程 =+LIGHIt //等待子线程返回 _Pno9| try{ svx7 if(bFirst) 3-btaG'P { | }L=e. nFileLength = getFileSize(); ^&D5J\][ if(nFileLength == -1) _&~l,%)& { ,hH c
-%- System.err.println("File Length is not known!"); ;*'I& } {yv_Ni*6! else if(nFileLength == -2) A_l\ij$Y { ny{S&f System.err.println("File is not access!"); 0cSm^a } O|S,="h"} else L(bDk'zi { v4Wq0>o for(int i=0;i<nStartPos.length;i++) ]
)iP?2{ { >fMzUTJ4 nStartPos = (long)(i*(nFileLength/nStartPos.length)); d5NE:%K } )w~1VcnJEp for(int i=0;i<nEndPos.length-1;i++) tA^+RO4 { X{Fr nEndPos = nStartPos[i+1]; S{?l/*Il*_ } aGBd~y@e nEndPos[nEndPos.length-1] = nFileLength; 'z^'+}iyv } xT+#K5 } &c 2Qa LtH
j r95,X! //启动子线程 e`co:HO`# fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; e/cHH34 for(int i=0;i<nStartPos.length;i++) `+T 2IPN
{ <o9AjASv\, fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), $@@ii+W}\ siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), :-O$rm nStartPos,nEndPos,i); |fywqQFq Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); bfpeK>T fileSplitterFetch.start(); 3b\s;! } ]?)uYot // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), c&1_lI,tH siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); (V&8
WN // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", pj<aMh nEndPos = " + nFileLength); Dt<MEpbur // fileSplitterFetch[nPos.length-1].start(); $K+|bb { TI,|'>5[ +_ /ys! //等待子线程结束 L){V(*K ' //int count = 0; c]Gs{V]\ //是否结束while循环 7TEpjSuF boolean breakWhile = false; @`)>-k %f'=9pit Xq
)7Im}? while(!bStop) !@])Ut@tN { 4lR+nmAZ write_nPos(); gaQ E'qp> Utility.sleep(500); S !#5 breakWhile = true; 4i.&geXA. +L"F] _? x&^Xgi? for(int i=0;i<nStartPos.length;i++) za}Kd^KeB { V)Oot| if(!fileSplitterFetch.bDownOver) Y-Q)sv { (&NLLrsio breakWhile = false; k~so+k&=b break; H>D sAHS } Y@:l!4DI } cLp_\\ if(breakWhile) 5=8v\q?)c break; G~DHNO6 50dN~(;p [T4{K& //count++; JBA{i45x //if(count>4) xv Xci W // siteStop(); 8\9W:D@"x } r>! @Z2%s 9(qoME}>= ftcLP System.err.println("文件下载结束!"); q+4dHS)x } 5x|$q kI catch(Exception e){e.printStackTrace ();} p#Po? } Q=d:Yz":S eaNfCXHDN )X," NJG //获得文件长度 -W.-m2:1 public long getFileSize() 3 ^x&G?) { I$S*elveG int nFileLength = -1; jl}!UG try{ Xs|d#WbX URL url = new URL(siteInfoBean.getSSiteURL()); K|\0jd)N HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); n^$Q^[:Z httpConnection.setRequestProperty("User-Agent","NetFox"); 0[fBP\H"Wr @`+\vmfD ^7ID |uMr int responseCode=httpConnection.getResponseCode(); ^!C
if(responseCode>=400) x^c,cV+* { c%O97J.5b processErrorCode(responseCode); }"nm3\Df return -2; //-2 represent access is error !SE } `n-/~7 J"<
h#@` FeS
,TQ4j String sHeader; }f_@@#KB? ^t71${w## J @~g> for(int i=1;;i++) o3\^9-jmp { j@#RfVx //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); y{<js!au //Utility.log(in.readLine()); Z
ztp %2c sHeader=httpConnection.getHeaderFieldKey(i); y${`W94 if(sHeader!=null) -hfkF+=U' { suIYfjh if(sHeader.equals("Content-Length")) o<p4r}*AVJ { %-fS:~$ nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); A@?-"=h} break; p<h( } bC"h7$3 } +~YoP> else 2Mq@5n break; J=8Y D"1 } z>0$SBQ- } cZ
!$XXA` catch(IOException e){e.printStackTrace ();} }@jJv|| catch(Exception e){e.printStackTrace ();} qhG2j; ">_|!B&wb^ ^K: :g) Utility.log(nFileLength); ^\ln8!; ^8bc<c:P jj;TS% return nFileLength; %Qb}z@>fJk } D3,)H%5.y jTNt!2 :B ZwY mR= //保存下载信息(文件指针位置) yK9EHJ$ private void write_nPos() k:iy()n[ { /qwY/^ try{ !mWm@}Ujg output = new DataOutputStream(new FileOutputStream(tmpFile)); _<2{8>EVf output.writeInt(nStartPos.length); AB0}6g^O for(int i=0;i<nStartPos.length;i++) ~.J*_0~Ze { 6vTnm4 // output.writeLong(nPos); gaNe\ output.writeLong(fileSplitterFetch.nStartPos); 8"NPj0 output.writeLong(fileSplitterFetch.nEndPos); {/N8[?zML } YMNLn9 output.close(); Wi5Dl= } X{i>Q_8> catch(IOException e){e.printStackTrace ();} hyJ&~i0P{J catch(Exception e){e.printStackTrace ();} NOoF1kS+ } R=48:XG3/K =d<~:!) m+7%]$ //读取保存的下载信息(文件指针位置) )+Z.J]$O- private void read_nPos() b&QI#w { +\dKe[j{g try{ C2zKt/)A DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); FYu30 int nCount = input.readInt(); qf ]le]J nStartPos = new long[nCount]; I*JJvqh nEndPos = new long[nCount]; E@)'Z6r1 for(int i=0;i<nStartPos.length;i++) vaHtWz!P { ;gu4~LQw nStartPos = input.readLong(); |9.J?YP8 ( nEndPos = input.readLong(); _I3"35a } /pU`- input.close(); B<Cg_C } 2'OY,Ooe catch(IOException e){e.printStackTrace ();} (E,[Ad,$ catch(Exception e){e.printStackTrace ();} Unq~lt%2 } }M"])B I
'qde#[VB VM&Ref4 private void processErrorCode(int nErrorCode) Y}q~Km { W?!rqo2SP System.err.println("Error Code : " + nErrorCode); Hi$N"16A5z } LH @B\ mS iFcSz ~Al3Dv9x //停止文件下载 }wBpBw2J public void siteStop()
ZdY$NpR, { Btr>ek bStop = true; H d7Vp:KM for(int i=0;i<nStartPos.length;i++) _akjgwu fileSplitterFetch.splitterStop(); v+trHdSBYE cUd>ahv 8'qlg|{!~ } j"pyK@v2B } 5! +{JTXa //负责部分文件的抓取 .V}bfd[k$ **FileSplitterFetch.java =;Co0Q` */ XhWo~zh" package NetFox; lk81IhI \Nf[8n#{ (|<+yQ,@> import java.io.*; cH:&S=>h import java.net.*; kz("LI] 'L9hM.+ +eKLwM public class FileSplitterFetch extends Thread { #4"eQ*.*" Sd.Km a (~5]1S}F String sURL; //File URL umAO&S.+M long nStartPos; //File Snippet Start Position 8cMX=P long nEndPos; //File Snippet End Position <s|.2~ int nThreadID; //Thread's ID ci:|x = boolean bDownOver = false; //Downing is over |)0Ta9~ boolean bStop = false; //Stop identical <}c7E3Uc FileAccessI fileAccessI = null; //File Access interface vpdPW %B XN?my@_HpM :P%?!'M public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException m MWhUr { rFm?Bu this.sURL = sURL; c(b`eUOO this.nStartPos = nStart; Bf+~&I#E this.nEndPos = nEnd; -ULgVGYKK nThreadID = id; ![vy{U.:` fileAccessI = new FileAccessI(sName,nStartPos);//定位 L*4=b
(3 } X_bB6A6 t,0}}9%? \h0+`
;Q public void run() +7
j/.R { Lc]hwMGR* while(nStartPos < nEndPos && !bStop) KjF8T7% { %gSmOW2.c^ !Z{7X ^ JX&%5sn( try{ v^p* l0r6: URL url = new URL(sURL); 63$`KG3 HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); ZJhI|wRwD httpConnection.setRequestProperty("User-Agent","NetFox"); 'gD./|Z0 String sProperty = "bytes="+nStartPos+"-"; []yIz1P=j httpConnection.setRequestProperty("RANGE",sProperty); 28+{ Utility.log(sProperty); `fJ;4$4 +<V$G/" BNr%Q:Q InputStream input = httpConnection.getInputStream(); 5
I#-h<SG //logResponseHead(httpConnection); d$E>bo-\ 0a@tPskV
z.2UZ%: byte[] b = new byte[1024]; rxJl;!7G int nRead; [(TmAEON while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) I4UsDs*BD { d>#X+;-k nStartPos += fileAccessI.write(b,0,nRead); ?
IlT[yMw //if(nThreadID == 1) h. 4#C}> ) // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); yiH;fK +x } o"P )(; K)Z~ iBRM At[SkG}b Utility.log("Thread " + nThreadID + " is over!"); j
b'M bDownOver = true; "qZTgCOY2 //nPos = fileAccessI.write (b,0,nRead); FLkZZ\ } I.~=\%Z{ catch(Exception e){e.printStackTrace ();} ,qV 7$u } loBW#> } QC]<`! zJUT<%[U $`vXI%|. //打印回应的头信息 m@L>6;* public void logResponseHead(HttpURLConnection con) If 'N0^'W { < %<nh`D for(int i=1;;i++) ~%
`hh9] { 9ku|w#%I String header=con.getHeaderFieldKey(i); z
3Z8vq if(header!=null) E0!0 uSg& //responseHeaders.put(header,httpConnection.getHeaderField(header)); V}Q`dEk2r Utility.log(header+" : "+con.getHeaderField(header)); k{|>!(Ax else h:FN&E c} break; R]>0A3P } d:cOdm>, } A%&lW9z7 ~rXLb: 0Am\02R.C, public void splitterStop() B_8JwMJu3 {
y0) mBCX bStop = true; [L| vBr } Zk|PQfi+ Y q|OX<i`K Hxc>? } `m"K_\w=/ 8W7ET@` }~0}B[Rf /* Y$|KY/)H) **FileAccess.java
j~9Y0jz_ *//文件访问(定位,写) }y(cv}8Y package NetFox; Ar_Yl|a import java.io.*; W%9~'pXgB h*Mi/\ q 4Ok$~"I public class FileAccessI implements Serializable{ ]'>jw#|h Go]y{9+(7 //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 I.SMn,N RandomAccessFile oSavedFile; GFnwj<V+{ long nPos; m5P@F@
n#4T o;CS z$/s` |] public FileAccessI() throws IOException kaECjZ_&+ { o##!S6:A this("",0); E=,fdyj. } P/k#([:2 2J3y
1 3YUF\L]yyw public FileAccessI(String sName,long nPos) throws IOException mWLi XKnb { M3JV^{O/DV oSavedFile = new RandomAccessFile(sName,"rw"); `bLJwJ7 this.nPos = nPos; Ca/N'|}^ oSavedFile.seek(nPos); ]4lC/&nm } XF@34b5( DoICf1 [8acan+
2l public synchronized int write(byte[] b,int nStart,int nLen) 9sv#TT5V { T7Ju7_q} int n = -1; ~eiD(04^r* try{ 5pff}Ru` oSavedFile.write(b,nStart,nLen); jF#Dc[* n = nLen; d@Wze[M?0 } }p8iq catch(IOException e) mK^E@uxN { 6J-=6t| e.printStackTrace (); \t=#MzjR } &C?4'e VY=YI}E 8@FgvWC return n; M%$-c3x } `C^0YGO% 9R[PpE'' yRp&pUtb } _0iV6Bj <e@4;Z(h04 lpbcpB /* 4#B56f8 **SiteInfoBean.java _@_EQ!= */ X LY>}r package NetFox; 4i"fHVp8 gmiLjI
C +Wa(K public class SiteInfoBean { lxR]Bh+ @)ls+}=Y _]0<G8|Rv private String sSiteURL; //Site's URL YlZ&4 private String sFilePath; //Saved File's Path @qF:v]=_@ private String sFileName; //Saved File's Name ,"?8 private int nSplitter; //Count of Splited Downloading File &hM7y7 hij
9r z >`` public SiteInfoBean() [[ll4| {//nSplitter的缺省值为5 "_+8z_ //default value of nSplitter is 5 p$Floubh] this("","","",5); +'[/eW } F84<='K tU.~7f#+A {]4Zpev public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) OgzKX>N`A { gA] 3h8%w sSiteURL= sURL; *(Z\"o! sFilePath = sPath; JI&.d: sFileName = sName; $h
>rs this.nSplitter = nSpiltter; ~bw=;xF{3 wF*9%K'E :=:m4UJb } AO(zl*4 v&sl_w/tn #9HX"<5
public String getSSiteURL() M>{*PHze0 { K d{o/R return sSiteURL; ;O<-4$ } |[)pQGw sy(.p^Z ]L
k- -\ public void setSSiteURL(String value) qsYg%Z { DyUS^iz~o sSiteURL = value; Q $Sp' } Qs<L$"L1 *y|zF6 A,?6|g`q' public String getSFilePath() {r#uD5NJ/ { d@ ]N return sFilePath; [<wpH0lNoy } *rYPjk6g[ /^WOrMR A~<cp)E public void setSFilePath(String value) nL]eGC { 6$H`wDh#(& sFilePath = value; _Ec"[xW } {"|la;*I _]L]_Bh ({cWb:+r public String getSFileName() Us%g&MWdpb { uF[~YJ> return sFileName; +&<k}Mz } I
|"' 60WlC0Y~u fk\]wFj public void setSFileName(String value) n8i: /ypB { *qFl&*h} sFileName = value; ^,`]Q)P^ } 4hkyq>c} 02-% B~oP n|B<rx?v public int getNSplitter() |*l^<= = { }-Jo9dNs return nSplitter; =o'g5Be<F } b)r;a5"<5 lWBewnLKE LyG`q3@ public void setNSplitter(int nCount) `$vf 9'\+ { #L&/o9| nSplitter = nCount; ~6+>2|wIS } ^4et;
F% } ]&tcocq 7JBr{3;eS
6NSSuK3 /* d?V/V'T[ **Utility.java ^UFNds'q */
{~XAg~ package NetFox; VLoRS) 9~y:K$NO >'jkL5l public class Utility { sH]T1z LZQG. ?A-f_0<0 public Utility() ScmwHid:\ { FRXaPod ??("0U ant2];0p } #c~-8= l8e)|MSh //线程睡眠 { _Y'%Ggh public static void sleep(int nSecond) \C{Zqo, { /)<kG(Z try{ .kJu17! Thread.sleep(nSecond); -z%->OUu } KEf1GU6s catch(Exception e) ;j+*}|! { xc7Rrh]} e.printStackTrace (); '}-QZ$|* } 9WV8ZP } PH'n`D# XV,ce~ro[ //日志 IYa(B+nB) public static void log(String sMsg) e*d lGK3l { A+FQmLS System.err.println(sMsg); ~yA^6[a = } {aUv>T"c We'= /! ?a'EkZ.dB public static void log(int sMsg) :)h4SD8Y { PF+Or System.err.println(sMsg); y.(m#&T } *:`fgaIDa } Nnoj6+b -OnKvpeI wNUcL*n /* d@zxgn7o **TestMethod.java Yu9VtC1 */ XinKG<3! package NetFox; _qh\
<N3~X,ch V}Oz!
O public class TestMethod { KIKIag# nP|ah~
q ngk:q5Tp public TestMethod() ^ (J%)&_\3 { ///xx/weblogic60b2_win.exe Nz%pl! try{ J|HV8 SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); 7Q,<h8N\5 //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); u#Bj#y! SiteFileFetch fileFetch = new SiteFileFetch(bean); ]I]G3 e fileFetch.start(); f lt'~fe } 4ywtE}mp catch(Exception e){e.printStackTrace ();} dP#7ev]'
gADqIPu] .k#O[^~] } dF|R`Pa2ML 1`l(H4 MYR\W*B'b public static void main(String[] args) x@:98P { 8cRc5X new TestMethod(); 9Vt6);cA-] } jwI1 I {x } mxe\+j# 点击下载更多相关资料
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