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/* L%k67> **SiteFileFetch.java &+,:u*% */ R
!Fx)xj package NetFox; ,YQ=Zk)w import java.io.*; xSx&79Ez<* import java.net.*; fJvr+4i4k I7A7X* +<GrRYbC public class SiteFileFetch extends Thread { loR,XW7z F9v)R#u~ FLK"|*A SiteInfoBean siteInfoBean = null; //文件信息Bean ?U}sQ;c$ long[] nStartPos; //开始位置 ,eyp$^ 2 long[] nEndPos; //结束位置 AL(n*, FileSplitterFetch[] fileSplitterFetch; //子线程对象 )\RzE[Cb long nFileLength; //文件长度 VtD@&N boolean bFirst = true; //是否第一次取文件 >c}:
boolean bStop = false; //停止标志 !?S5IGLOj File tmpFile; //文件下载的临时信息 sWp{Y. DataOutputStream output; //输出到文件的输出流 F1 9;RaP+ \)uy"+ Z` //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) *iPs4Es- public SiteFileFetch(SiteInfoBean bean) throws IOException &"sX^6t { #8S [z5 ` siteInfoBean = bean; Z@<q/2).| //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); aIQrb tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); 0Ddn@!J* if(tmpFile.exists ()) YN_X0+b3C { q2[+-B)m bFirst = false; :yd=No@ read_nPos(); zNNzsT8na } jB*9 !xrd, else ;%v%K+}r { Ti0
(VdY nStartPos = new long[bean.getNSplitter()]; z~GVvgd nEndPos = new long[bean.getNSplitter()]; .a
~s_E } pI'8>_o sZ0g99eX \a{Aa Na~g*)uT$ } ]$* $0 L-^# 02 e-nWD public void run() 43UJ#rF { 9itdRa== //获得文件长度 '?&B5C //分割文件 J`U$b+q6 //实例FileSplitterFetch M>`?m
L //启动FileSplitterFetch线程 [X0k{FR //等待子线程返回 MAsWds`bpB try{ j<.
<S { if(bFirst) >WGX|"!" { O^QR;<t' nFileLength = getFileSize(); ;`X`c if(nFileLength == -1) 31
KDeFg { 5^G7pI7 System.err.println("File Length is not known!"); K8yWg\K } 5Ws:Ei{R else if(nFileLength == -2) F9>(W#aC { $i1>?pb3 System.err.println("File is not access!"); RW|UQY# } mI{CM:
: else *@b~f&Lx6 { E
6>1Fm8%V for(int i=0;i<nStartPos.length;i++) XnNOj>! { +iZ@.LI nStartPos = (long)(i*(nFileLength/nStartPos.length)); ND)M3qp2( } BP7<^`i& for(int i=0;i<nEndPos.length-1;i++) &;uGIk>s { rm7*l<v6 nEndPos = nStartPos[i+1]; W#oEF/G } @E&X&F% nEndPos[nEndPos.length-1] = nFileLength; (+]Ig> t } +#i,87 } hs -}:^S` DbPBgD>Q 3V8j>&
//启动子线程 qB`0^V fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; L@^!( for(int i=0;i<nStartPos.length;i++) -Y!=Iw
4 { b{yH4)O fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), s525`Q; siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), 6w .iEb nStartPos,nEndPos,i); B4M'Er{v Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); mtHi9).,y| fileSplitterFetch.start(); ;r2b@x:<_ } &`\kb2uep // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), <)0LwkFtB siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); 1nX68fS.9 // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", [3bwbfHhi nEndPos = " + nFileLength); @Z1?t%1 // fileSplitterFetch[nPos.length-1].start(); 37<GG) O+3D
5* JqH.QnKcv //等待子线程结束 z;@S_0M,Z //int count = 0; U%SNROj //是否结束while循环 z<C~DH boolean breakWhile = false; f|HgLFx *^&iw$Qx3 "}azC|:5 while(!bStop) s#8{:ko { xX67bswG write_nPos(); ^,\se9=( Utility.sleep(500); |Y,X=Ed breakWhile = true; [+[fD y5opdIaT nh_xbo5L[ for(int i=0;i<nStartPos.length;i++) F\$}8,9 { :d/:Ga5v! if(!fileSplitterFetch.bDownOver) N'1 [t { J jL0/& breakWhile = false; s9)8{z break; QH56tQq } \?Oa}&k$F8 } 8B(Q7Qj if(breakWhile) #on fac- 3 break; s!zr>N" vN[m5)aT ~o\]K //count++; b9!J}hto, //if(count>4) Wug ?CFX+T // siteStop(); _[6+FdS], } X$Qi[=L L``mF(R^ 1</t #r System.err.println("文件下载结束!"); 6(RqR } @C6DOB catch(Exception e){e.printStackTrace ();} NhaeAD
$e } L&F\"q9q71 b+fy&rk@- UM;bVf? //获得文件长度 y#SD-#I- public long getFileSize() REe%>|
{ GVPEene int nFileLength = -1; !N2 n@bo try{ 4rCqN.J URL url = new URL(siteInfoBean.getSSiteURL()); v6(l#,
HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); vnT
httpConnection.setRequestProperty("User-Agent","NetFox"); AZm)$@e) 0Nzv@g{3 ZtZV:re= int responseCode=httpConnection.getResponseCode(); hQrsZv:Q
if(responseCode>=400) kT3;%D^ { rAi!'vIE processErrorCode(responseCode); 9n2%7dLQ* return -2; //-2 represent access is error eh#
(}v } `Y9}5p rs)aEmvC Y
.X-8 String sHeader; *fyEw\`a &Fr68HNmj FKTP0e7=9 for(int i=1;;i++) U\plt%2m> { 9S`b7U=P //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); m,"tdVo . //Utility.log(in.readLine()); WUQh[A41 sHeader=httpConnection.getHeaderFieldKey(i); !c' ;L' if(sHeader!=null) 'wHkE/83 { <OFqUp*l if(sHeader.equals("Content-Length")) H s 3*OhK\ { T[II;[EiE nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); rm;"98~zJ? break; 2n,73$s } n ]g,)m } |xC
TX else UjK&`a;V break; Oc3%pb; } 9E*K44L/V } s: .XF|e{ catch(IOException e){e.printStackTrace ();} _\6(4a`, catch(Exception e){e.printStackTrace ();} VZ!$'?? Z-V%lRQ=b ~&jCz4M Utility.log(nFileLength); *g}&&$b0 r\D8_S_ U6 R4UK return nFileLength; NGzqiu"J } JQ4>S<ttJ Z*B(L@H vG} oo //保存下载信息(文件指针位置) kV<)>Gs private void write_nPos() _YUF /B' { q{(&:~M try{ bS"M* output = new DataOutputStream(new FileOutputStream(tmpFile)); jg/<"/E output.writeInt(nStartPos.length); 0_.hU^fP for(int i=0;i<nStartPos.length;i++) SHh(ujz, { EF~PM // output.writeLong(nPos); U$Z}<8 output.writeLong(fileSplitterFetch.nStartPos); !X_~|5. output.writeLong(fileSplitterFetch.nEndPos); tYa*%|!v } znRhQ+8;! output.close(); boon=;{p } ?^Ux+mVE catch(IOException e){e.printStackTrace ();} ?Ea"%z*c5 catch(Exception e){e.printStackTrace ();} .9QQ]fLs } K@lV P!z '& :"/4@) RkM! BcB //读取保存的下载信息(文件指针位置) +.cv,1Vx private void read_nPos() :Aw VeX@ { (v}: try{ ]^<~[QK_C DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); S\(_"xJPp int nCount = input.readInt(); P!EX;+7+x nStartPos = new long[nCount]; $Plk4 o*g nEndPos = new long[nCount]; qiN'Tuw9 for(int i=0;i<nStartPos.length;i++) a/fYD2uNo { }fZBP]<I( nStartPos = input.readLong(); e+TNG &_ nEndPos = input.readLong(); Qt 2hb } f_8~b0` input.close(); 7(Kc9sJC%% } F^-4Pyq@ catch(IOException e){e.printStackTrace ();} @dNbL}qQ catch(Exception e){e.printStackTrace ();} <5%We(3 } htaLOTO;A J;dFmZOk ;q2T*4NN private void processErrorCode(int nErrorCode) 6~LpBlb { Ok!{2$P8U9 System.err.println("Error Code : " + nErrorCode); &@+;]t } )3 @T"385> ^da-R;o] //停止文件下载 (n\
cs$ public void siteStop() %<t/xAge
{ 4y]*"(sQ; bStop = true; tP-c>|cz for(int i=0;i<nStartPos.length;i++) =_Rd0, fileSplitterFetch.splitterStop(); e<K=Q$U. }{J8U2])k }: e9\r) } l<+k[@Vox } 3Daq5(fLP //负责部分文件的抓取 xmDwoLU **FileSplitterFetch.java m`~ Qr~ */ &0raa package NetFox; FmPF7 H'2 =yhtVh Qsa2iw{ import java.io.*; \z
'noc import java.net.*; yr?\YKV)I 566EMy| -/X-.#}- public class FileSplitterFetch extends Thread { 2ip~qZNw>< 9}N*(PI zPe . String sURL; //File URL UpILr\3U long nStartPos; //File Snippet Start Position Eh+lLtZ long nEndPos; //File Snippet End Position vq}V0-
< int nThreadID; //Thread's ID J']W7!p boolean bDownOver = false; //Downing is over 5>
UgBA boolean bStop = false; //Stop identical gQ~4udla. FileAccessI fileAccessI = null; //File Access interface DVd/OU
X9 R-GT ~$B,K] public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException eR
CGr?e4 { P\JpE this.sURL = sURL; j*"s~8u4 this.nStartPos = nStart; H UjmJu6f{ this.nEndPos = nEnd; rYl37.QE nThreadID = id; sdLFBiR fileAccessI = new FileAccessI(sName,nStartPos);//定位 {<@~;iq } /.r($Sg^ B}W^s;h ?4_;9MkN public void run() _[x(p6Xp { 8'y|cF%U while(nStartPos < nEndPos && !bStop) 8Bhng;jX { 4J s>yP r"+
WUU kcle|B try{ ;1KhUf;&F URL url = new URL(sURL); t%)L8%Jr HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); vzL>ZBeZ httpConnection.setRequestProperty("User-Agent","NetFox"); kQ + String sProperty = "bytes="+nStartPos+"-"; ]zO]*d=m httpConnection.setRequestProperty("RANGE",sProperty); g!$
"CX%8 Utility.log(sProperty); {R K#W~h rTH@PDk>) _R]h]<TQ InputStream input = httpConnection.getInputStream(); bWqGypq4 //logResponseHead(httpConnection); QO8/?^d
[7bY( +=R:n^r^, byte[] b = new byte[1024]; ?NL2|8 int nRead; \vI_%su1N while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) |l9AgwDg { %UmE=V nStartPos += fileAccessI.write(b,0,nRead); UJb7v:^ //if(nThreadID == 1) *G9;d0 // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); (/%}a`2#o } QwhPN'U ;BqX=X+# E$cr3 t7Xy Utility.log("Thread " + nThreadID + " is over!"); &HWH
UWB bDownOver = true; Y, P-@( //nPos = fileAccessI.write (b,0,nRead); 7
ir T6O<. } X@arUs7 catch(Exception e){e.printStackTrace ();} J(Bn
n } '&"7(8E}
* } V#=N?p T/H*Bo*=5 .m<-)Kx //打印回应的头信息 \1tce`+ public void logResponseHead(HttpURLConnection con) nP}/#Wy { |aZ^K\yI F for(int i=1;;i++) {Z|C { /:S.("Unv String header=con.getHeaderFieldKey(i); eA!aUu if(header!=null) w:qwU\U>x //responseHeaders.put(header,httpConnection.getHeaderField(header)); 2]@U$E='s Utility.log(header+" : "+con.getHeaderField(header)); z
>pq<}R6 else U9JqZ! break; m_pK'jc } @FQ@*XD } ;>PV]0bOm> -/h$Yb , 7}Ri public void splitterStop() ]|-y[iu { @gZ%>qe bStop = true; Y$(G)Fs } w'UP#vT5& NWKD:{ 4-m}W;igu } ddw!FH2W
(
"dA"N$ &oT]ycz% /* tvd/Y|bV= **FileAccess.java )&*&ZL0 *//文件访问(定位,写) Jap
v<lV% package NetFox; 0hPm,H*Y] import java.io.*; .9`.\v6R 0py0zE6,, Q 5Ln'La$ public class FileAccessI implements Serializable{ d~.#K S A0'Yfuie //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 b+{yF RandomAccessFile oSavedFile; c^m}ep\F5L long nPos; /ZAEvdO*P " I:j a7 '06[@Cw public FileAccessI() throws IOException ,\Cy'TSz { 6n>+cX>E this("",0); kg_TXB } Z{%h6"" |`,%%p|T% Zu5`-[mw public FileAccessI(String sName,long nPos) throws IOException Lw3Z^G { 3uN;*f oSavedFile = new RandomAccessFile(sName,"rw"); P}cGWfj this.nPos = nPos; d~qDQ6! oSavedFile.seek(nPos); m,-:(82 } O%rjY N8:vn0ww 1,Y-_e) public synchronized int write(byte[] b,int nStart,int nLen) n`}vcVL; { c\n\gQ:LQ int n = -1; `2{x8A try{ tM~R?9OaJ oSavedFile.write(b,nStart,nLen); ,*Sj7qb# n = nLen; y+@7k3" } =T!M` catch(IOException e) S?;&vs9j { 9^ )=N=wV e.printStackTrace (); #p0vrQ;5f } I:[3x2H zxXm9zrLo "`16-g97 return n; ]>&au8 } )~rN{W<s`H &d=j_9 ~fEgrF d } c}lUP(Ss F?TAyD* 5_{C \S`T /* @99@do|C **SiteInfoBean.java ~p^6 */ *uNa(yd package NetFox; S$ dFz Q!MS_
#O YS%HZFY, " public class SiteInfoBean { }~yhkt5K _z~|*7@ A@+pvC& private String sSiteURL; //Site's URL .XTBy/(0 private String sFilePath; //Saved File's Path 9>%ti&_-jt private String sFileName; //Saved File's Name GVe[)R private int nSplitter; //Count of Splited Downloading File BG/M3 j$siCsF eNpGa0 eG public SiteInfoBean() Y0
Ta&TYZ0 {//nSplitter的缺省值为5 *e!0ZB3J //default value of nSplitter is 5 ^ola5w D this("","","",5); k#&d`?X } wm!Y5 BH0].-)[y! YR^J7b\ public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) ma,H<0R { NvQN sSiteURL= sURL; 7vubkj& sFilePath = sPath; K#kU6/ sFileName = sName; |-%[Z this.nSplitter = nSpiltter; ;i@,TU +\2{{~_z N\BB8<F } ?V3e;n QJjqtOf> h%9#~gJ}) public String getSSiteURL() Hcq?7_) { l`4hWs\I return sSiteURL; a"4j9cO } .k|8nNj ?zM]p"M xp.~i*!` public void setSSiteURL(String value) 3{O^q/R { {}y"JbXMj sSiteURL = value; 6=0"3%jn@ } by (xv0v; ,C1}gPQ6< |>Qj] public String getSFilePath() 1/:WA:]1, { ozy~`$;c return sFilePath; &A)AV<=>T } fucG 9B Q30AaG}f ~7IXJeon public void setSFilePath(String value) "AMbU68 { _o`+c wc sFilePath = value; ?A+-k4l } yY_Zq\
p"\Z@c JTA65T{3 public String getSFileName() t2uX+1F { ).0klwfV return sFileName; B+:/!_ } ZF^$?;'3 @8{-B; jgNdcP public void setSFileName(String value) 8lk@ev=O& { uxLT*, sFileName = value; +"Flu.+[' } wVX]"o WdI9))J2S yyB;'4Af public int getNSplitter() \"Jgs. { "H\1Z,P<m return nSplitter; %/iD@2r } ova4 cNOtfn6?F ^h\& l{e public void setNSplitter(int nCount) ~
"Xcd8: { Zawnx=
nSplitter = nCount; nI]8w6eCV } 0vR
gmn } }@6ws/5 "sh*,K5x| 7vZtEwC)n /* ZEa31[@B[ **Utility.java @
>_v/U' */ p?rh+0wgX package NetFox; |iSd< Z$jqB~=^e In13crr4! public class Utility { x#
M MrV&M m' HAt~ |z1er"zR) public Utility() 89n\$7Ff9 { &Z'3n9zl ETZE.a ISa}Km>Q } =`<9N% [QUaC3l) //线程睡眠 r)<c
~\0 7 public static void sleep(int nSecond) gOb"-;Zw { M]|tXo$? try{ 4Ys\<\~d Thread.sleep(nSecond); (-S\%,hO } ak1?MKV. catch(Exception e) |Yb]@9>vn { zu/BDyF e.printStackTrace (); ^Mvgm3hg } Ln+;HorZ] } ;Qn)~b~ Q rBb!.r //日志 L;RHshTy public static void log(String sMsg) uvG'Kx { OTe h8h System.err.println(sMsg); ( fNG51h! } qkXnpv l(A)G d5> <=nOyT9 public static void log(int sMsg) 2o)8 'Lp { d)>b/0CZ System.err.println(sMsg); fM/~k>wl } L0\~K~q } xqSoE[<v ,F%2'W S$N!Dj@e; /* Fv_B(a **TestMethod.java !}lCwV */ )B*D\9\Z package NetFox; k%D|17I gUr#3# h;[<4zw public class TestMethod { 1u8 k} g{6FpuA|0 56JxHQu public TestMethod() 8&Md=ZvK` { ///xx/weblogic60b2_win.exe LA]UIM@ try{ i2P:I A|@ SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); ;{lb_du2: //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); E]O/'-
SiteFileFetch fileFetch = new SiteFileFetch(bean); k'8tqIUN] fileFetch.start(); F5y0(=$T } @#r6->%W catch(Exception e){e.printStackTrace ();} J5!-<oJ/ y
g:&cIr, #_SsSD=.Sy } Nn#;Kjul. <EKTFHJ! U3**x5F_ public static void main(String[] args) v?Zo5uVoq { DuQW?9^232 new TestMethod(); {h*)|J } -{XDQ{z<% } ZS<`.L6B3 点击下载更多相关资料
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