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/* rcF;Lp : **SiteFileFetch.java QKE$>G
*/ nwOr package NetFox; |hiYV import java.io.*; +}I[l,,xy import java.net.*; h"
P4 j/#kO? NA]7qb%%< public class SiteFileFetch extends Thread { [qIi_(%o wU2y<?$\8 ]Qkto4DQ5 SiteInfoBean siteInfoBean = null; //文件信息Bean !5?#^q long[] nStartPos; //开始位置 nyw, Fu long[] nEndPos; //结束位置 Zo-E0[9 FileSplitterFetch[] fileSplitterFetch; //子线程对象 ^.nvX{H8~= long nFileLength; //文件长度 7$8z}2 boolean bFirst = true; //是否第一次取文件 jtS+y)2 boolean bStop = false; //停止标志 gD@ &/j7 File tmpFile; //文件下载的临时信息 q4xB`G DataOutputStream output; //输出到文件的输出流 67<zBw2 4)]g=-3 //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) Olj]A]v} public SiteFileFetch(SiteInfoBean bean) throws IOException ^h1VCyoR* { N#bWMZ" siteInfoBean = bean; (=QaAn,,R //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); 7I&7YhFI tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); DcQ^V4_ if(tmpFile.exists ()) ]^3_eHa^d { \Y
Cj/tG8 bFirst = false; zb?wlfT read_nPos(); I{_St8 } o%Vf#W else -=Q_E^' { S/G,A,"c nStartPos = new long[bean.getNSplitter()]; ed'}ReLK nEndPos = new long[bean.getNSplitter()]; f0IljY!. } 83412@& )XnG.T{0| HsR#dp+s~ @1*lmFq'kV } ,b-wo k]qZOO} 2 8f-8B public void run() 5caYA&R { N>/*)Frt //获得文件长度 [YHvyfk~_ //分割文件 zv@'x
nY] //实例FileSplitterFetch ojs&W]r0Z //启动FileSplitterFetch线程 i\3BA"ZX //等待子线程返回 -102W{V/T try{ <^~Xnstl if(bFirst) j+Y4>fL$ { G qk"%irZ nFileLength = getFileSize(); } <2F]UuR if(nFileLength == -1) a_waLH/ { }(ay( System.err.println("File Length is not known!"); Te[[xhTyw } j /)cdP else if(nFileLength == -2) pEH[fA] { ?OZbns~ System.err.println("File is not access!"); S4qh8c } O .TFV. else ]N!SG@X+ { 7Kk rfJqN for(int i=0;i<nStartPos.length;i++) }h+a8@ { i_`YZ7Hxp nStartPos = (long)(i*(nFileLength/nStartPos.length)); DECX18D } "sAR<5b for(int i=0;i<nEndPos.length-1;i++) 7/PHg)&
{ a}i{b2B nEndPos = nStartPos[i+1]; '8*gJ7] } 7 z<!2 nEndPos[nEndPos.length-1] = nFileLength; /nv1.c)k } reu[}k ~ } IH\k_Yf#u iBp 71x65 )P|%=laE8 //启动子线程 >z>UtT: fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; Mky$#SI11 for(int i=0;i<nStartPos.length;i++) zesEbR)j { *VHBTO9 fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), 4TwU0N+> siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), rJ\A)O+Mq( nStartPos,nEndPos,i); "*+epC|ks Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); *9j9=N? fileSplitterFetch.start(); Xuh_bW&zF } *n}9_V% // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), xBgf)'W_Z siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); U|{WtuR // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", D.*JG7;=Z nEndPos = " + nFileLength); 3C_g)5
_: // fileSplitterFetch[nPos.length-1].start(); VZAdc*X Zr}`W\ 3-o ]H'6 //等待子线程结束 (g7nMrE$j //int count = 0; JGj_{|=: //是否结束while循环 <(BA ws(X boolean breakWhile = false; YLSG
5vF+ 3q pkMu3 Ql&P1|& while(!bStop) OQ+?nB { 2i,Jnv=sR write_nPos(); aj(M{gFq~ Utility.sleep(500); JYv&I t breakWhile = true; ZmmuP/~2K CvbY2_>Nh ec=4L@V* for(int i=0;i<nStartPos.length;i++) HS(<wI { y{j>4g$:z if(!fileSplitterFetch.bDownOver) t&eD;lg : { Q96g7[ breakWhile = false; zN2sipJS8 break; )B}]0`z:P } 1+y&n? } \F1nEj if(breakWhile) cgz'6q'T break; }PED#Uv ^1*p]j( V{d"cs>9 //count++; ~-W.yg6D{ //if(count>4) ioa 1n=j // siteStop(); V8n}" } Jt)<RMQ^R =602%ef\ KJ9~"v
System.err.println("文件下载结束!"); ,(c="L4[ } !kV?h5@Bo catch(Exception e){e.printStackTrace ();} l" sR\`~ } }DZkCzK E+~~d6nB jWU)y)$ //获得文件长度 ?nt6vqaV public long getFileSize() $mlsFBd { X='4N< int nFileLength = -1; 2ZE4^j| try{ .Bi7~*N URL url = new URL(siteInfoBean.getSSiteURL()); m|f|u3'z$ HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); (>;~((2 httpConnection.setRequestProperty("User-Agent","NetFox"); \H" (*["& IL>g- Wq,UxMz int responseCode=httpConnection.getResponseCode(); *-P@|eg if(responseCode>=400) B"Fg`s+]U { 4tu2%Og)? processErrorCode(responseCode); >Zr/U!W*? return -2; //-2 represent access is error Pc4sReo' } )L#I#% 97Q!Rot 'fVk1Qj^ String sHeader; GGLVv) ~+T~}S [xE\IqwM for(int i=1;;i++) w6wXe_N+M { OKf/[hyu //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); ol:_2G2xQ //Utility.log(in.readLine()); r;Dl sHeader=httpConnection.getHeaderFieldKey(i); aqyXxJS8 if(sHeader!=null) P,># { Wg$MKc9Vy[ if(sHeader.equals("Content-Length")) pkxW19h*0 { CV&
SNA nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); 90ORx\Oeo break; 4Yn*q~f } q-!m|<Z } dvXu?F55 else lq%s/l break; #[i({1`^L } xknP
`T } *sw$OnVb catch(IOException e){e.printStackTrace ();} >G-D& A+ catch(Exception e){e.printStackTrace ();} h,#AY[ Q ,YiBu^E9 ;XTP^W!6f Utility.log(nFileLength); Af
-{' ;e[-t/SI $Z;0/\r% return nFileLength; EL+}ab2S } M@gm.)d z{%G 4)"jg[ //保存下载信息(文件指针位置) N*$Q(K private void write_nPos() e{?~m6 { 5q8bM.k\7N try{ ].Et&v output = new DataOutputStream(new FileOutputStream(tmpFile)); \?GMtM,
output.writeInt(nStartPos.length); 3-Ti'xM for(int i=0;i<nStartPos.length;i++) .IYE"0)wJ { yt<K!=7& // output.writeLong(nPos); ^ 5UIbA( output.writeLong(fileSplitterFetch.nStartPos); Qb SX'mx< output.writeLong(fileSplitterFetch.nEndPos); c5t?S@b } "0]i4d1l output.close(); U9;AU]A } Uq[NOJC catch(IOException e){e.printStackTrace ();} gGZ$}vX catch(Exception e){e.printStackTrace ();} GbMSO }
zx\?cF YxsWY7J z}pdcQl# //读取保存的下载信息(文件指针位置) l9SbuT$U private void read_nPos() hx:x5L> { \Mi y+<8$ try{ 9 s>JdAw? DataInputStream input = new DataInputStream(new FileInputStream(tmpFile));
XLzHm&; int nCount = input.readInt(); ~A6QX8a nStartPos = new long[nCount]; 0_%u(? nEndPos = new long[nCount]; 3|@Ske1%Y for(int i=0;i<nStartPos.length;i++) Jj([O2Eq$ { @=@WRPGM*9 nStartPos = input.readLong(); 5$jKw\FF= nEndPos = input.readLong(); lJ}lO,g } ;zp0,[r input.close(); g y&B"` } 7
bpV= catch(IOException e){e.printStackTrace ();} :.Np7[~{ catch(Exception e){e.printStackTrace ();} 'KXvn0 } tTP"*Bb CM~)\prks 0A|.ch private void processErrorCode(int nErrorCode) f4:gD*YT { /tV)8pEj System.err.println("Error Code : " + nErrorCode); PCD1I98 } Pirc49c fpzC# b~cN#w
# //停止文件下载 @4H*kA public void siteStop() WzZb-F { Z.rKV}yjY bStop = true; 3VKArv- for(int i=0;i<nStartPos.length;i++) mNs&*h} fileSplitterFetch.splitterStop(); 7zy6`OP bl:.D~@ jYuH
zf } &grT} } H{9di\xnEm //负责部分文件的抓取 ^TnBtIU-B **FileSplitterFetch.java p"Fj6T2 */ LL.YkYu package NetFox; q(_pk&/ 4WDh8U 7X1T9'jI2 import java.io.*; KLlW\MF1 import java.net.*; *qGxQ?/ j@Z4(XL $\{@wL public class FileSplitterFetch extends Thread { lS9rgq<n P b2exS( p]IF=~b String sURL; //File URL %?R}sUo long nStartPos; //File Snippet Start Position >8HcCG long nEndPos; //File Snippet End Position
-x@mS2 int nThreadID; //Thread's ID kcI3pmgj boolean bDownOver = false; //Downing is over Oe*emUX7 boolean bStop = false; //Stop identical EubF`w$KWX FileAccessI fileAccessI = null; //File Access interface .J'}qkz~ X >C*(/a fY$M**/, public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException jj.i W@m { (B]rINY| this.sURL = sURL; mq su8ti this.nStartPos = nStart; h0d;a this.nEndPos = nEnd; 1Y\g{A" nThreadID = id; kC0F@'D fileAccessI = new FileAccessI(sName,nStartPos);//定位 )"wWV{k } -AJe\ J 2 591Syyy "{j4?3f) public void run() $#8dtF { ?nCG:\&;'= while(nStartPos < nEndPos && !bStop) mKQ!@$* { >
QDmSy*& 6Jrh'6o@ gI<TfcC try{ 5fA<I _ D URL url = new URL(sURL); h /@G[5E HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); zT*EpIa+LS httpConnection.setRequestProperty("User-Agent","NetFox"); vc5g4ud String sProperty = "bytes="+nStartPos+"-"; :WJ[a# httpConnection.setRequestProperty("RANGE",sProperty); STL&ZO Utility.log(sProperty); O2-9Oo@#, G!uoKiL 6ix8P;;}# InputStream input = httpConnection.getInputStream(); fOtL6/? //logResponseHead(httpConnection); 8:|F'{<<b AK} wSXF $&I##od byte[] b = new byte[1024]; |Xlpgdiu int nRead; 4(f[Z9 iZ] while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) F/IXqj { B{PI&a9~s% nStartPos += fileAccessI.write(b,0,nRead); M6[&od //if(nThreadID == 1) &2d^=fih // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); K}L-$B*i } bb`GV {.K>9#^m 4U*J{''L Utility.log("Thread " + nThreadID + " is over!"); Xk8+m> bDownOver = true; O=?WI
//nPos = fileAccessI.write (b,0,nRead); 67wY_\m 9I } =c"`>Vi@d catch(Exception e){e.printStackTrace ();} ba^B$$?B o } o['HiX } RtwlPz<~S N0,wT6. 4p\<b8(9> //打印回应的头信息 AK]{^Hvz public void logResponseHead(HttpURLConnection con) @`^+XP K\ { 4Z12Z@ A#7 for(int i=1;;i++) Y?a*-" { AKk6kI8F String header=con.getHeaderFieldKey(i); r({!ejT{U if(header!=null) WwG78b-OA //responseHeaders.put(header,httpConnection.getHeaderField(header)); xDD3Y{K Utility.log(header+" : "+con.getHeaderField(header)); s<Px au+A else >>oR@ break; mrX 2w } |WqEJ*$, } %xF
j;U? /n;Ll](ri :34]}`- public void splitterStop() `?r]OVe{y { S{'/=Px+ bStop = true; ErIAS6HS' } U]jHe (N{Rda*8 3omFd#EP } "uf*?m3 D!<[\G sLrSi /* Z
M_
6A1 **FileAccess.java ywWF+kR_ *//文件访问(定位,写) qKNX^n; package NetFox; Y7(E<1Yx import java.io.*; ChO?Lm$y uTTM%-DMHT .@KpN*`KH public class FileAccessI implements Serializable{ U+: o y:mz QFt7L //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 4gbi?UAmX RandomAccessFile oSavedFile; z(V?pHv+ long nPos; 6$c,#%Jt* 7ADh e&%m[:W:< public FileAccessI() throws IOException |TM&:4D]^ { |<tZ| this("",0); XN65bq } b Lag&c) ~_<I}!j/B $.{CA-~%[ public FileAccessI(String sName,long nPos) throws IOException KzD5>Xf]4$ { J%}9"Q5 oSavedFile = new RandomAccessFile(sName,"rw"); <q|IP_ this.nPos = nPos; Q M7z
. oSavedFile.seek(nPos); x}Qet4vV } X{KWBk.1 ?g9mDe;k dayp1%d public synchronized int write(byte[] b,int nStart,int nLen) 6QS[mWU { !9|)v7} int n = -1; YF/@]6j
try{ B~zP!^m oSavedFile.write(b,nStart,nLen); oEPO0O n = nLen; %SORs(4 } 7
+A-S9P) catch(IOException e) )P4#P2 { Vfew )]I e.printStackTrace (); ]yu,YZ@7 } L$zI_
z !#cZ! 8was/^9; return n; 5"(AqXoq } t95hI DtD clfi)-^{K F jdh&9Zc } nTrfbK@ <qZ"W6&& Q|eRek /* $tvGS6p> **SiteInfoBean.java E-h`lDoJ */ lsmzy_gV7 package NetFox; R:=C . 2_t/2 N}{CL(xi public class SiteInfoBean { 47I5Y5 ,])@?TJb@ g*$
0G private String sSiteURL; //Site's URL AU1P?lk private String sFilePath; //Saved File's Path %-"? private String sFileName; //Saved File's Name ),`MAevp private int nSplitter; //Count of Splited Downloading File bh=d'9B@&J 7O5`&Z'- /Z<" 6g? public SiteInfoBean() N{n}]Js1D- {//nSplitter的缺省值为5 QrDrdA //default value of nSplitter is 5 $IUP; this("","","",5); 9R.IYnq } i gzISYC_ 20 gPx; U,/NygB~ public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) Db({k,P'Y { GEP YSp sSiteURL= sURL; 'N,3]Soi sFilePath = sPath; HN>eS Y+ sFileName = sName; %Fb"&F^7 this.nSplitter = nSpiltter; oQ!} @CaN| J)(H-xvV &rj6<b1A } Ne/jvWWN /:dVW"A| #I9|>XE1 public String getSSiteURL() DoWY*2E { G\h8j*o
return sSiteURL; QQ@, v@j5 } G}i\UXFE ,
6\i >VP\@xt(R[ public void setSSiteURL(String value) #V-qS/ q" { 9,5v %HZ sSiteURL = value; ri~d Wx } `9Ngax=_ mm%w0dOb" G1B~?i2$ ? public String getSFilePath() G~)jk+Qq { _J&u{ return sFilePath; rPK?pJ } GN{\ccej )<4o"R:* GSV, public void setSFilePath(String value) Rz`<E97- { '.~vN L+
O sFilePath = value; DMcvu*A } xTD6?X'4 O60j C;{F IgEg public String getSFileName() 5WP[-J) { 9}X3Q!iFb return sFileName; mL+}Ka } Ndi'b_Sh\ KtY~Y _wM[U`H}s public void setSFileName(String value) P,h@F+OZN { _ %&"4bm. sFileName = value; )ACa0V>*p } vJGxD\h v Xio1hu [k-7Kq public int getNSplitter() 8q7KqYu { <t]c' return nSplitter; EBzg<-?o } "r cPJX <)Kjf/x BO[Q"g$Kon public void setNSplitter(int nCount) i40r}?- { KtEMH nSplitter = nCount; i[3$Wi$ } *-+~H1tP } qCgP8U/jv &%u,b~cL? (]1le|+ /* >jl"Yr# **Utility.java |nry^zb */ @{I55EQ] package NetFox; idO3/>R
[ AaTtYd m OmT]X public class Utility { ie.cTTOI gK)B3dH*& tY# F8a& public Utility() 5tq$SF42X { MiRH i<g0 4vqu(w8
L @D"|Jq=6P } [9(B;;R@
L$jyeFB5 //线程睡眠 ;SC|VcbyH public static void sleep(int nSecond) ;o^m"I\y { G#@<bg3 try{ ;k/0N~ Thread.sleep(nSecond); ^;@Bz~Z } '3hvR4P catch(Exception e) ^ *
DKF { :+Dn]:\ e.printStackTrace (); KAsS= ` } <Isr } y
Fp1@*ef Ds}6{']K //日志 Wnf`Rf)1z public static void log(String sMsg) |=%$7b\C { a}>GQu*y System.err.println(sMsg); J.?p?-" } ae!_u
\$ }f-rWe{gs> IL%&*B public static void log(int sMsg) W2^eE9 { cuKgO{.GH System.err.println(sMsg); $^
>n@Q@&L } V;:A& } b/5~VY*T tQl= q0c)pxD%` /* i;dr(c/ft **TestMethod.java X 4/r#<Da */ =~EQ3uX package NetFox; 5~[Fh2+ t]&n_]`{. ^9{ 2 public class TestMethod { KPO((G0& lJYv2EZ \uPT-M* public TestMethod() 6|jE3rHw { ///xx/weblogic60b2_win.exe 3t_5Xacj try{ X*Q7Yu SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); qob!!A14p //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); Bf*
F^ SiteFileFetch fileFetch = new SiteFileFetch(bean); SfR!q4b= fileFetch.start(); pEaH^(I* } }oU&J81 catch(Exception e){e.printStackTrace ();} S7SPc (6A{6_p [R:O'AP}@} } ix/uV)]k` ftH
0aI Sqge5 v public static void main(String[] args)
?PQiVL { R1m18GHQ new TestMethod(); ,}|V'y } ?<}qx`+%Q } .ZJh-cd 点击下载更多相关资料
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