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/* Dm"GCV **SiteFileFetch.java Skq%S`1%Q */ d* 7 Tjs{\ package NetFox; C/tn0 import java.io.*; -D`*$rp, import java.net.*; > & \QLo[5 G}AfCd4 83Bp_K2\ public class SiteFileFetch extends Thread { LKFL2|af r8}GiP0| RWz^
MV5K SiteInfoBean siteInfoBean = null; //文件信息Bean *GTCVxu long[] nStartPos; //开始位置 v.c2(w/P long[] nEndPos; //结束位置 }| (KI FileSplitterFetch[] fileSplitterFetch; //子线程对象 KPs5? X long nFileLength; //文件长度 jx+%X\zokA boolean bFirst = true; //是否第一次取文件 A#f@0W: boolean bStop = false; //停止标志 Tr-gdX ; File tmpFile; //文件下载的临时信息 )1Z*kY?f! DataOutputStream output; //输出到文件的输出流 Z~9\7QJn |*e
>hk //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) OtrO"K public SiteFileFetch(SiteInfoBean bean) throws IOException 4-lEo{IIM { d {T3 siteInfoBean = bean; ;sS N //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); YJ_LD6PL9 tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); "fL:scq@0 if(tmpFile.exists ()) y8D'V)B { ZH~ T'Bg bFirst = false; :W? 7J" read_nPos(); ?6; +.h\ } K#}DXq else BOoLs(p { $7T3wv9 nStartPos = new long[bean.getNSplitter()]; A|O7W|"W nEndPos = new long[bean.getNSplitter()]; x{6/di } }2|>Y[v2j Ir_K83VM W]4Gs; 3<AZ,gF1 } 9pb4!=g* % tN{ ez"Xb 7 public void run() Z1wN+Y.CA { oL2|@WNj, //获得文件长度 <9@I50; //分割文件 4Sf v //实例FileSplitterFetch e@Q<hb0<eU //启动FileSplitterFetch线程 2fu|X#R //等待子线程返回 |nk&ir6 try{ W8'cAY if(bFirst) !=V>DgmW { [ft#zxCJ nFileLength = getFileSize(); ,q] Wi# if(nFileLength == -1) S2HGf~rE { &s>HiL>f System.err.println("File Length is not known!"); 1l"A7
V } zC\ pd# else if(nFileLength == -2) pE[ul { Q?B5@J System.err.println("File is not access!"); )F,H(LblH } jV;&*4if else zZ3,e L { OQ;DqV for(int i=0;i<nStartPos.length;i++) DK}k||- { Hc ]/0: nStartPos = (long)(i*(nFileLength/nStartPos.length)); K{%}kUj> } ]s?BwLU6 for(int i=0;i<nEndPos.length-1;i++) H-K,Q%;C@ { ;H9d.D8 nEndPos = nStartPos[i+1]; :<YcV#!P } @kK${ nEndPos[nEndPos.length-1] = nFileLength; vd
c k } k-@CcrepF } TPZZln'3 /d ?) r DX_$,3L //启动子线程 Z$ {I4a fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; N 3i,_ for(int i=0;i<nStartPos.length;i++) TL ;2,@H` { +/*g?Vt fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), 4&~ft siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), 0K <@?cI nStartPos,nEndPos,i); ? "]fGp6y Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); Jtnuo]{R fileSplitterFetch.start(); Uc/MPCqZ } 'j6PL;~c // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), qsk8 # siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); *y9 iuJ} // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", 9&q<6TZ z nEndPos = " + nFileLength); O,>1GKw"\ // fileSplitterFetch[nPos.length-1].start(); ja3wXz$2 {}H5%W kz\
D-b //等待子线程结束 j(F&*aH78 //int count = 0; Yv\.QrxPm //是否结束while循环 awQf$ boolean breakWhile = false; .?UK`O2Q vE0Ty9OH"] m=b~Wf39 while(!bStop) lG;RfDI- { X3vTyIsn write_nPos(); uvz}qH@j/Q Utility.sleep(500); V'sp6:3*\ breakWhile = true; ??5qR8n. g^OU+7o 8aQ\Yx for(int i=0;i<nStartPos.length;i++) B<i)je! { 8 !]$ljg if(!fileSplitterFetch.bDownOver) \Q7Nz2X { R,-y breakWhile = false; p:U9#(v) break; =PWh,lWS } Z;M]^? } /.l8Jb4 if(breakWhile) O'{UAb+- break; ?}\aG3_4 |q"WJQ c+c3C8s*8 //count++; <GC<uB |p //if(count>4) Wu(6FQ`H // siteStop(); -&I%=0q } w-*$gk] ^UHt1[ *9M 5' System.err.println("文件下载结束!"); 'L4@|c~x } mO;X>~K catch(Exception e){e.printStackTrace ();} t<mT=(zt* } t$^1A1Ef Z[<rz6%cB ,rVm81-2 //获得文件长度 gq~>S1 public long getFileSize() Sr Z\] { iK8aj)%Q@ int nFileLength = -1; "v@$CR9<T try{ Z(Fsk4, URL url = new URL(siteInfoBean.getSSiteURL()); ~n9BN'@x HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); L!s/0kBg httpConnection.setRequestProperty("User-Agent","NetFox"); ,R]hNjs-{ 0i/l2&x*k] ??0C"8:[ int responseCode=httpConnection.getResponseCode(); vY0C(jK if(responseCode>=400) mJe;BU"y] { /{Ksi+q processErrorCode(responseCode); .q$HL t return -2; //-2 represent access is error *ci,;-*C } w|!>>W6J )_N|r$i\ (yIl]ZN* String sHeader; $o"Szy W}p>jP} 1^ZQXUzl%i for(int i=1;;i++) (oO*|\9u { :c3}J<Z //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); Nv}'"V> //Utility.log(in.readLine()); ^vmT=f;TM sHeader=httpConnection.getHeaderFieldKey(i); F!OVx< if(sHeader!=null) S'm&Ll2i@ { G,I[zhX\ if(sHeader.equals("Content-Length")) vJ9Uw { LDqq'}qK6 nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); m|!R/,>S4 break; &m2FEQLj } }mQ7N&cC } P6V_cw$ else 8wz%e( break; t:NTk( } vn<z\wVbf } g]?&qF} catch(IOException e){e.printStackTrace ();} {E`[`Kf catch(Exception e){e.printStackTrace ();} m?bd6'&FR YSERQo #12 Utility.log(nFileLength); nTxeV% *X- 6]C 5W_u|z+/g return nFileLength; S\=j; Uem } jq#gFt* PhL }V|W> Q`k=VSUk //保存下载信息(文件指针位置) ep`WYR|B private void write_nPos() OCmF/B_ { 6'
}oo'#~ try{ .v;$sst5y output = new DataOutputStream(new FileOutputStream(tmpFile)); 1H sfCky{ output.writeInt(nStartPos.length); ?RL[#d+y for(int i=0;i<nStartPos.length;i++) )cOw9s { %&m/e?@%I // output.writeLong(nPos); A_3V1<J`] output.writeLong(fileSplitterFetch.nStartPos); h.CbOI%Q output.writeLong(fileSplitterFetch.nEndPos); Wm>[5h%> } @b[{.mU output.close(); \|9@*]6: } pJ35M catch(IOException e){e.printStackTrace ();} }pOL[$L catch(Exception e){e.printStackTrace ();} W FVx7 } ;mH O# <>JN3? l",JN.w //读取保存的下载信息(文件指针位置) *6D0>F private void read_nPos() _aa3;kT_ { J60XUxf try{ 5u
+U^D DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); &|>CW:)&1" int nCount = input.readInt(); 3aIP^I1 nStartPos = new long[nCount]; i}teY{pyc nEndPos = new long[nCount];
s;V~dxAiv for(int i=0;i<nStartPos.length;i++) (
HCB\!g { qW*JB4`?a nStartPos = input.readLong(); BoQLjS{kN nEndPos = input.readLong(); :xOne<@ } I\djZG$s;N input.close(); 1OB,UU"S$ } )yvI { catch(IOException e){e.printStackTrace ();} c'M#va catch(Exception e){e.printStackTrace ();} k L\;90 } u!I Es M^^5JNY (IdXJvKU! private void processErrorCode(int nErrorCode) f P'qUN { #'5|$ug[ System.err.println("Error Code : " + nErrorCode); ):"Z7~j= } al>^}: RsV<4$ y+b4sFf //停止文件下载 _BGw)Z 6 public void siteStop() `x=W)o
} { $="t7C9S bStop = true; 2R9AYI for(int i=0;i<nStartPos.length;i++) 533n
z8&9@ fileSplitterFetch.splitterStop(); E"d\N-I _<tWy+. :|cC7,S } X(sHFVU+ } Hy4c{Ij //负责部分文件的抓取 kA3nhBH **FileSplitterFetch.java 6*yt^[W */ Qtj.@CGB package NetFox; eeKErpj8A zN}1Qh A+3, y<j\ import java.io.*; 7&oT}Z import java.net.*; 'Cw&9cL9w (
R2432R}J UjCQ W:[ public class FileSplitterFetch extends Thread { 6)<g%bH! (-k`|X" 1, 5"sQ$ String sURL; //File URL Vl=!^T}l+ long nStartPos; //File Snippet Start Position b4NUx)%ln long nEndPos; //File Snippet End Position b(^g v int nThreadID; //Thread's ID `PML4P[ boolean bDownOver = false; //Downing is over }dnO7K boolean bStop = false; //Stop identical I+nKaN+8i
FileAccessI fileAccessI = null; //File Access interface G@s]HJ: +/!kL0[v +; /]' public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException \:>GF-Z( { `qP <S
this.sURL = sURL; FR%9Qb7 this.nStartPos = nStart; zadn`B#2 this.nEndPos = nEnd; Md!L@gX6< nThreadID = id; b|
e7mis@ fileAccessI = new FileAccessI(sName,nStartPos);//定位 yGGQ;!/ } jUny&Alj &T7|f!y =Xwr*FTr public void run() DH7B4P { b*C\0D while(nStartPos < nEndPos && !bStop) _i@{:v { ;F>$\"aG %x$1g) "J51\8G@@ try{ ly,3,ok URL url = new URL(sURL); UO3QwZ4j; HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); +Fn^@/?yC httpConnection.setRequestProperty("User-Agent","NetFox"); "9mVBa|Q String sProperty = "bytes="+nStartPos+"-"; DeqTr: httpConnection.setRequestProperty("RANGE",sProperty); 8sMDe' Utility.log(sProperty); +7yirp~`K y2"PKBK\_ Xx.4K>j+j InputStream input = httpConnection.getInputStream(); :exgdm;N //logResponseHead(httpConnection); c?@WNv +rT%C&ze &yu3nA:7D byte[] b = new byte[1024]; lr>:S int nRead; Xz/5Wis4 while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) z^@.b { IZr~h9 nStartPos += fileAccessI.write(b,0,nRead); [V vTR#^ //if(nThreadID == 1) $e(]L(o; // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); jg2UX } cvoE4&m! T6T3:DG_B px|y_.DB2x Utility.log("Thread " + nThreadID + " is over!"); PKDzIA~T bDownOver = true; x#wkODLqi //nPos = fileAccessI.write (b,0,nRead); m8Wv46% } ~|W0+ &): catch(Exception e){e.printStackTrace ();} $!~R'N c }
$f++n5I } _e2=BE`W) OR{<)L qG=?+em //打印回应的头信息 977%9z<h public void logResponseHead(HttpURLConnection con) +Ce[OG. { M8 4{u!>[ for(int i=1;;i++) =bn(9Gm!J { .9":Ljs(L String header=con.getHeaderFieldKey(i); 6Z5X?B if(header!=null) Ino$N|G[ //responseHeaders.put(header,httpConnection.getHeaderField(header)); "6[a%f#Q Utility.log(header+" : "+con.getHeaderField(header)); {zTo[i else B8XW+U break; A`|Z2 } s& INcjC } X#625h MCPVql`+`q }]dK26pX public void splitterStop() ,r=9$i_ { U8f!yXF' bStop = true; +XaRwcLC. } ySfot`LQ &m=GkK dA)JR"r2 } NNKI+!vg (8Q0?SZN O9+Dd%_KS# /* h8nJt>h **FileAccess.java *wH.]$ *//文件访问(定位,写) I:~KF/q package NetFox; goE \C import java.io.*; vbo|q[z 3YKJN4 kIC$ai6. public class FileAccessI implements Serializable{ O\3
Lx |4$.mb.
//RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 ]lX`[HX7 RandomAccessFile oSavedFile; xz$-_NWW long nPos; C:*=tD1 %anY'GK fU6O: - public FileAccessI() throws IOException {Xw6]d { {D6p?TL+ this("",0); TFfV?rBI } cO8':P5Q :.k1="H~@ {V8yJ{.G public FileAccessI(String sName,long nPos) throws IOException 3"*tP+H { fbTq?4&Q oSavedFile = new RandomAccessFile(sName,"rw"); )S:,q3gxJ this.nPos = nPos; eD(;Wn oSavedFile.seek(nPos); 65% WjO } 9\QeH'A wZ(H[be (G>S`B public synchronized int write(byte[] b,int nStart,int nLen) s6U$]9 ` { lQ8h -Tz int n = -1; h_( #U)z_3 try{ Io(*_3V)B oSavedFile.write(b,nStart,nLen); 2`|gnVw n = nLen; H%nA"- } D]?eRO9' catch(IOException e) f3>L/9[[<P { y;\m1o2 e.printStackTrace (); 1BjMVMH } Q.U
wtH '3p7ee& Jw4#u5$$Z return n; ^vj} } s~z~9#G(6 }&*wJ]j`L *(,zPn, } {
R`"Nk 'bd|Oww1u s|`Z V^R /* yd}1Mx **SiteInfoBean.java ?rJe"TOIy */ 8opd0'SNaB package NetFox; rWP
-Rm 18HmS>Qo A2 r\=for public class SiteInfoBean { eT'Z;ZO *=2sXH1j Uhw:XV@m private String sSiteURL; //Site's URL f`gs/R private String sFilePath; //Saved File's Path qk{+Y private String sFileName; //Saved File's Name @W1F4HYds private int nSplitter; //Count of Splited Downloading File 2Y7u M;8 N|rB~
baO'FyCs9& public SiteInfoBean() 9cnLf# {//nSplitter的缺省值为5 0Ym_l?]m[ //default value of nSplitter is 5 G%HuB5:u this("","","",5); ^H(,^cVN } ^vY[d]R _\ +%~/~1 q:/3uC7
public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) ^[6S]Ft( { SWLt5dV sSiteURL= sURL; zR!p-7_w sFilePath = sPath; jU9\BYUg sFileName = sName; )Jaq5OMA/ this.nSplitter = nSpiltter; iLbf:DXK( n/6qc3\5i |>~pA} } }0oVIr tW
-f_0a. QFNw2:) public String getSSiteURL() [["az'Lrk? { PB(q9gf"1} return sSiteURL; BY5ODc$ } {8pN]=SaJ~ #]kO/Mr R_zQiSwG< public void setSSiteURL(String value) h]jy):9L { ;{Nc9d sSiteURL = value; |[W7&@hF } ccY! OSae :Ldx^UO 0@tN3u?dx public String getSFilePath() v;o/M6GL5 { (3Dz'X return sFilePath; o()No_.8H } d=DQS>Nz V sQ~Y,7 Fz {T; public void setSFilePath(String value) i}gsxq% { KK';ho,W sFilePath = value; O63:t$Yx# } UbEK2&q/8 !zQbF&> hd1aNaF- public String getSFileName() l2ARM3" { skP'- ^F~ return sFileName; "j/jhe6 } <<Q}|$Wu w(oi6kg })yB2Q0 public void setSFileName(String value) gLK _b;: { ?J ,K[.z sFileName = value; oe*CZ } P[%nD cB REGk2t.L LEC=@) B public int getNSplitter() \~>
.NH- { _J X>#h return nSplitter; `{1~]?-& } Q;?rqi
, Ih<.2 _$P1N^}Zs public void setNSplitter(int nCount) 0^83:C
^{ { \h@3dJ4 nSplitter = nCount; awl3|k/ } }0}=-g& } LaX<2]Tx: m0p%R>:5 Fv-~v& /* \A 5Na-/9 **Utility.java o/hj~;(] */ VZ$^:.I0 package NetFox; |c[= V?AC w_P2\B^ R.KznJ public class Utility { 6E{(_i 2&zklXuo: (9Of,2]&E public Utility() X$*]$Ge> { K/0Wp % L./{^) ML.|\:r* } Nj{; 9~{,Hj1xE //线程睡眠 zG)vmysJf public static void sleep(int nSecond) aen0XiB6~^ { n.=Zw2FE try{ ]oLyvG Thread.sleep(nSecond); a"D'QqtH } 8osP$"/o catch(Exception e) )%09j0y>l" { 'Pe;Tp>` e.printStackTrace ();
no(or5UJ } @~bP| a } LT#EYnG 3<>DDY2bl //日志 "j8`)XXa( public static void log(String sMsg) 0"{-<Wot} { \U>|^$4 #5 System.err.println(sMsg); g?N^9B,$2 } t=fr`|! ^/I.? :+ b(\Mi_J public static void log(int sMsg) `R*SHy!
_ { "fC>]iA8I System.err.println(sMsg); 6^)eW+ } {_4`0J`3 } >en\:pJn)' On0,#i= <;*w97n /* u6 Yp,!+ **TestMethod.java TN/y4(j */ pM9M8d package NetFox; ]app 9 #nq_R %-[*G;c'w public class TestMethod { Z^Yy
sf Xp9 ]
9H. tgj5l#P public TestMethod() LIll@2[ { ///xx/weblogic60b2_win.exe F!g;}_s9 try{ nrR2U` SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); 6mqp`x` //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); .hJcK/m SiteFileFetch fileFetch = new SiteFileFetch(bean); ]&s@5<S[ fileFetch.start(); *M.,Yoj } n#sK31;yb catch(Exception e){e.printStackTrace ();} QO:Z8{21So [X7gP4 ??f,(om } ZiPz~G0[^ \Vpv78QF; $Gcjm~ public static void main(String[] args) *z};&UsF{ { I|wC`VgB new TestMethod(); B`YD>oCN } CwD=nT5` } Vjd(Z 点击下载更多相关资料
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