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/* rF/k$_bFt **SiteFileFetch.java cv .R`)l */ b,Z\{M:f;F package NetFox; =B0#z]qu import java.io.*; Gu3# y"a> import java.net.*; &YSjwRr
d".Xp4}f gPo3jw o$ public class SiteFileFetch extends Thread { =JqKdLH 7j9X<8* _'W en SiteInfoBean siteInfoBean = null; //文件信息Bean _{eH"
,( long[] nStartPos; //开始位置 Uz;z long[] nEndPos; //结束位置 :o)4Y FileSplitterFetch[] fileSplitterFetch; //子线程对象 l,I[r$TCf long nFileLength; //文件长度 p\"WX boolean bFirst = true; //是否第一次取文件 lURL;h boolean bStop = false; //停止标志 p41TSALq File tmpFile; //文件下载的临时信息 s.9)?<[ DataOutputStream output; //输出到文件的输出流 sQ4~oZZ _P^ xX'v //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) ,#NH]T`c1 public SiteFileFetch(SiteInfoBean bean) throws IOException C78V/{ { *dTI4k siteInfoBean = bean; o7qZy |\4S //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); ai3wSUYJi tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); TQor-Cymz if(tmpFile.exists ()) '@{'T LMCi { ^Yz.}a##w2 bFirst = false; Vy-kogVt read_nPos(); <~rf;2LZ } /2<1/[# else y; .U-}e1 { ,KfBG<3 nStartPos = new long[bean.getNSplitter()]; ?qdZ]M4e nEndPos = new long[bean.getNSplitter()]; M%\=Fb } 1 2Lc$\3P @T
}p. 8hKyp5(%l m(CbMu } 6 4fB$ =;) M+" w2o%{n\L public void run() <0P7NC:Ci { )[w_LHKI //获得文件长度 xu]>TC1 //分割文件 j06Xz\c //实例FileSplitterFetch BEm~o#D //启动FileSplitterFetch线程 I^CKq?V?: //等待子线程返回 q h+c}"4m try{ gz,x6mnQ if(bFirst) 1L4-hYtCj { !oJ226>WI nFileLength = getFileSize(); f&n6;N if(nFileLength == -1) UC u4S > { Ah_Ttj System.err.println("File Length is not known!"); ",qcqG( } )\!-n]+A else if(nFileLength == -2) na%DF@Rt# { y[pU8QSt System.err.println("File is not access!"); 8,5H^Bi } ~ sC< V else qv+8wJ(( { Q#,j,h for(int i=0;i<nStartPos.length;i++) M)<4|x { ,{pC1A@s nStartPos = (long)(i*(nFileLength/nStartPos.length)); 4!I;U>b b } wG,"ZN for(int i=0;i<nEndPos.length-1;i++) S~Z`?qHWh { pE^j Uxk6 nEndPos = nStartPos[i+1]; tH}$j } _:ORu Vk nEndPos[nEndPos.length-1] = nFileLength; !,I530eh7 } aDae0$lc.S } P ]prrKZe, GWQ_X9+q zRz7*o&l //启动子线程 #?V7kds] fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; `H^?jX>7 for(int i=0;i<nStartPos.length;i++) hv6w=?7 { 8.g(&F fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), +FYQ7UE siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), +1R
qo nStartPos,nEndPos,i); ;)SWUXa;{ Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); LK?V`J5wY fileSplitterFetch.start(); x'uxSeH$ } M.[A%_|P // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), r
N.<S[ siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); ?)60JWOJ1 // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", #wvmVB. 5~ nEndPos = " + nFileLength); :'t+*{ff // fileSplitterFetch[nPos.length-1].start(); W{{{c2 . nJ ZQRRa:C ?eU=xO //等待子线程结束 =$^<@-; //int count = 0; LHS^[}x^1 //是否结束while循环 #Is/j = boolean breakWhile = false; bM9:h uPp9
UW +pq/:h while(!bStop) IhRYV`: { -%h0`hOG{ write_nPos(); [xrM){ItW Utility.sleep(500); 1\~-No breakWhile = true; L,
k\`9bQ gLH#UwfJ qXb{A*J for(int i=0;i<nStartPos.length;i++) HoFFce7o { 8%Wg;:DZx if(!fileSplitterFetch.bDownOver) ;`TSu5/ { 3 E~d breakWhile = false; 3XOf-v:~ break; L'*P;z7< } l$:.bwXXO } H=f'nm]dQ if(breakWhile) 5z$>M3 break; M<
T[%)v rLy<3 8:iu 8c$ //count++; N@z+h //if(count>4) EJbFo682 // siteStop(); @ZD/y%e } 6*cY[R|q! CXzN4!
?]d[K>bv System.err.println("文件下载结束!"); @t;WdbxB% } P/'9k0zs) catch(Exception e){e.printStackTrace ();} -d|VXD5N } "n4' \ig S!/N
lSr< &)8-iO //获得文件长度 Q]?Lg public long getFileSize() v7L}I[f { 5_d=~whO&2 int nFileLength = -1; [CfA\-gx<f try{ =>PBdW URL url = new URL(siteInfoBean.getSSiteURL()); * MJl( HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); @k ~_ w# httpConnection.setRequestProperty("User-Agent","NetFox"); frYPC
Irj 6]#\|lds1 |H,g}XWMU int responseCode=httpConnection.getResponseCode(); rRfPq if(responseCode>=400) A(xCW+h@) { /pa8>_, ~ processErrorCode(responseCode); 8@S5P$b}; return -2; //-2 represent access is error %o~w } 2WA =U] D-/aS5wM Mohy;#8Wk String sHeader; Cw=wU/) dXe.
5XC qlUw;{;p for(int i=1;;i++) 7jb{E+DrG { BBub' //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); Qe~2'Hw#9 //Utility.log(in.readLine()); L?@TF; sHeader=httpConnection.getHeaderFieldKey(i); V!'N:je if(sHeader!=null) s1[_Pk;! { bEXm@-ou if(sHeader.equals("Content-Length")) +UK". { )A`Zgg'L7D nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); K{
s=k/h break; yxECK&&P0# } G]Jchg < } 8\M%\]_ else ~)S Q{eK?& break; pearf2F } H3#xBn>9 } >};6>)0 catch(IOException e){e.printStackTrace ();} yqg&dq catch(Exception e){e.printStackTrace ();} No\H
QQ [N|/d# I82?sQ7 Utility.log(nFileLength); !eoN F4m Q#YlrS 8tc9H}> return nFileLength; FmALmS } ,|: a7b] brQkVt_)EE cI)XXb4 //保存下载信息(文件指针位置) W~1/vJ.*l private void write_nPos() ;|2h&8yX(/ { &h7q=-XU try{ ;w(]z output = new DataOutputStream(new FileOutputStream(tmpFile)); @-z#vJ5Qe{ output.writeInt(nStartPos.length); 2p( M`@ for(int i=0;i<nStartPos.length;i++) 5G~; g { ASuxty // output.writeLong(nPos); )e)@_0 output.writeLong(fileSplitterFetch.nStartPos); K8dlECy output.writeLong(fileSplitterFetch.nEndPos); ]Q\Ogfjp } n'/w(o$& output.close(); :!a9|Fh~ } lN,8(n?g catch(IOException e){e.printStackTrace ();} E"Z9 NDgl# catch(Exception e){e.printStackTrace ();} 8gap _qTo } %6`{KT? nL}bCX{ k'N `5M) //读取保存的下载信息(文件指针位置) .+G),P) private void read_nPos() #vy:aq<bjE { (/&IBd- try{ JM{S49Lx DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); %h**L'~`` int nCount = input.readInt(); H|='|k5Y. nStartPos = new long[nCount]; 28[dTsd% nEndPos = new long[nCount]; F|*{Ma for(int i=0;i<nStartPos.length;i++) d{.cIv { Q6y883>9 nStartPos = input.readLong(); {~yj]+Im nEndPos = input.readLong(); PUB|XgQDY: } =*.Nt*;; input.close(); %$j)?e } EXDtVa Ot catch(IOException e){e.printStackTrace ();} j%iz> catch(Exception e){e.printStackTrace ();} D4yJ:ATO& } 7N^9D
H{` 0s = h*"[ iTU8WWY< private void processErrorCode(int nErrorCode) Xj^6ZJc { %S8e:kc6 System.err.println("Error Code : " + nErrorCode); UA[2R1}d } #q~SfG 1<]g7W N2_j[Pe //停止文件下载 (NUk{MTX public void siteStop() >n@?F[ Y { oK h#th bStop = true; ;T2)nSAqt for(int i=0;i<nStartPos.length;i++) pb`F_->uq fileSplitterFetch.splitterStop(); 4Vj|k\vE4 Lj"~6l`) xm>RLx}9 } DCb\=E } ze
Qgg|; //负责部分文件的抓取 c,KT1me **FileSplitterFetch.java YzU(U_g$ */ L0SeG: package NetFox; &I.UEF2, mt7}1s,i[ /%Bc*k=ox import java.io.*; 0SV#M6`GX import java.net.*; t=iSMe 9+.0ZP? B^Q\l!r public class FileSplitterFetch extends Thread { zIWw055W krZ J"` v'B++-% String sURL; //File URL o)KF+[^ long nStartPos; //File Snippet Start Position DO(-)izC long nEndPos; //File Snippet End Position CzxU
@ int nThreadID; //Thread's ID 1TfK"\ boolean bDownOver = false; //Downing is over hS&,Gm`^ boolean bStop = false; //Stop identical L)VEA8} FileAccessI fileAccessI = null; //File Access interface )((Jnm D 2%N$Y] nBL7LocvR public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException ~C<
X~$y& { ;]?1i4p) this.sURL = sURL; W-%oj.BMA this.nStartPos = nStart; ^~0Mw;n& this.nEndPos = nEnd; CU 2;m\Hc nThreadID = id; %'j)~ fileAccessI = new FileAccessI(sName,nStartPos);//定位 s
z/7cLo } zF%CFqQ x^}kG[s i]*Wt8~! public void run() (7x5 { ,v:m while(nStartPos < nEndPos && !bStop) ,FX;-nP% { DF'-dh</* m8H|cQ@Uu S pDVD try{ V'~]b~R URL url = new URL(sURL); Z{`;Ys:zk HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); bp2l%A; httpConnection.setRequestProperty("User-Agent","NetFox"); R-J\c+C>W String sProperty = "bytes="+nStartPos+"-"; Nh~ Hh( httpConnection.setRequestProperty("RANGE",sProperty); "<0BCJJ Utility.log(sProperty); -;'8#"{`^ QJp
_>K 6}
!n0 InputStream input = httpConnection.getInputStream(); aT[Z#Zd, N //logResponseHead(httpConnection); }pj>BK> ?"PUw3V3lB 8 s!0Z1Roc byte[] b = new byte[1024]; ]y@8mb& int nRead; K8doYN while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) [o<R#f` { a ^<W
?Z nStartPos += fileAccessI.write(b,0,nRead); =:[Jz1 M5 //if(nThreadID == 1) WV!qG6\W // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); Rj9z'?a9 } )I{41/_YA 4x.'H18 vmL%%7 Utility.log("Thread " + nThreadID + " is over!"); "T@9]>6.f bDownOver = true; S*],18z? //nPos = fileAccessI.write (b,0,nRead); qyv9]Q1 } %d*k3f
} catch(Exception e){e.printStackTrace ();} 314PcSc } ^ruS } oAe]/ j$ }N(-e$88 E"bYl3 //打印回应的头信息 WM NcPHcj public void logResponseHead(HttpURLConnection con) :y%%Vx~ { (;P)oB"`C for(int i=1;;i++) 0G1? { 6#fl1GdH- String header=con.getHeaderFieldKey(i); \%=\_"^? if(header!=null) ln)_Jf1r //responseHeaders.put(header,httpConnection.getHeaderField(header)); 8s pGDg\g Utility.log(header+" : "+con.getHeaderField(header)); CL|t!+wU/ else _KC)f'Cx break; Oga0CR_ } }9t$Cs% } IBb3A (%"M% Qko P0S;aE public void splitterStop() UvRa7[<y%% { (Mhj-0xf$ bStop = true; Ev%4}GwO4 } ;$l!mv7 L=3^A'| Q^/66"Z:Z } AZt~ \qf /4+M0P l <splLZW3k /* JLm0[1Lzd **FileAccess.java OEy'8O$ *//文件访问(定位,写) lBh|+KN package NetFox; vC[)/w import java.io.*; #sdW3m_% FiJJe ^RrufwUA public class FileAccessI implements Serializable{ gBUtv|(@>[ o!^':mll //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 Lgpj<H[ RandomAccessFile oSavedFile; G*uy@s: long nPos; e*jt(p[Ge NmYSk6kWJ rc1EJ(c public FileAccessI() throws IOException dQ@e+u5 { Dg%zN i2GS this("",0); 1uz9zhG>< } Kc_QxON4 YOwo\'|= (o)nN8 public FileAccessI(String sName,long nPos) throws IOException .]0B=w* Z { /Z HuT=j1 oSavedFile = new RandomAccessFile(sName,"rw"); l;}D| 6+_W this.nPos = nPos; )VQ:L:1t( oSavedFile.seek(nPos); dbSIC[q } I
\zM\^S>] 7g}4gX's FYR%>Em public synchronized int write(byte[] b,int nStart,int nLen) ~{iBm"4 { EMzJJe{Cv int n = -1; p8hF`D~ try{ %YG ~ql oSavedFile.write(b,nStart,nLen); GJai!$v n = nLen; PF*<_p" j } JVf8KHDj catch(IOException e) `DIIJ<;g { 4_3Jpz* e.printStackTrace (); v>YdPQky } 5 :6^533] H`CDfTy "pdmz+k8S return n; I0P)DR } bPEf2Z
G4 ;X-~C.7k FFb`4. } Enm#\(j ;0O3b 8hba3L_Z /* .pNWpWL. **SiteInfoBean.java )dgXS//Y */ A-1Wn^,>* package NetFox; F2]v]]F! K#H}=Y A :&}(?=<R}L public class SiteInfoBean { 7SLJLn3d Ac'[( f305 yo private String sSiteURL; //Site's URL I]bqle0M private String sFilePath; //Saved File's Path evNo(U\C private String sFileName; //Saved File's Name I!&|L0Qq private int nSplitter; //Count of Splited Downloading File )9MmL-7K T^g2N`w2 R nt&<|8G public SiteInfoBean() 6js94ko[ {//nSplitter的缺省值为5 8o#*0d| //default value of nSplitter is 5 Iq0_X7:{QI this("","","",5); asb-syqU } *,5V;7OR <uDEDb1|l w'z?1M(* public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) #y%bx<A { Q(
.d!CQ> sSiteURL= sURL; J*$u sFilePath = sPath; CdgZq\ sFileName = sName; :zdMV6s this.nSplitter = nSpiltter; j9n3 ,S
E5W2a] ]\w0u7} } "- S2${ |F[E h
~ Vd~{SS2> public String getSSiteURL() Hq[d!qc { )kR~|Yn<- return sSiteURL; /KjRB_5~q} } )QEvV:\ h
92\1, eBX#^ public void setSSiteURL(String value) (iM"ug2 { g^@Kx5O\ sSiteURL = value; #3vq+mcn } Og[NRd+ jOj`S%7 x4fl= public String getSFilePath() ,o7aIg&_H { tgK$}#.* return sFilePath; uSCF;y=1g, } QEK,mc3 OY7\*wc: q+f]E&': public void setSFilePath(String value) lMz5))Rr { La9v97H: sFilePath = value; ?nJ7lLQA } ;cd{+0 Yn4c6K 8"/5Lh( public String getSFileName() }ozlED`E { ;> **+ezF return sFileName;
/B)ZB})z } H6(kxpOI\ oVutHt gXN#<g,:^ public void setSFileName(String value) ]Aap4+s { E;$)Oz sFileName = value; >y)(M(o } Ug02G e\x=4i `RDlk public int getNSplitter() P5/K?I~/So { d!kiWmw, return nSplitter; BqC, -gC } +^tq?PfE YY-{&+, nD6mLNi%a public void setNSplitter(int nCount) CY;ML6c@ { Z&FC:4!! nSplitter = nCount; g*C&Pr3 } :acnrW>i[@ } +g,:!5pg Gc2sY 0
S!Ue+jW /* {|?OKCG{ **Utility.java ~l"70\& */ Cc*"cQe package NetFox; vRa|lGeW Nw ;BhBt fD+'{ivN4 public class Utility { ^ZnlWZ@r vw=OGjT_>m {wMw$Fvf public Utility() y;A<R[|Ve { WmU4~. YSwAu,$jf & V:q}Q } 1~:7W (\m4o
//线程睡眠 jv7-i'I@ public static void sleep(int nSecond) bK;I:JK3 { ^|y6oj try{ JwWW w1 Thread.sleep(nSecond); *0]E4]ZO } 2|]$hjs catch(Exception e) Qr]xj7\@i { Q4e*Z9YJ e.printStackTrace (); H&jK|]UXoO } L6`(YX.: } Eyi^N0 `s#0/t //日志 jn vJ`7zFP public static void log(String sMsg) Jj+|>(P { *(6vO{ System.err.println(sMsg); wY|&qX, } W^; wr# -=BQVJ_dK{ .Tr!/mf_ public static void log(int sMsg) ]oB-qfbH { 5=%:CN!/@p System.err.println(sMsg); ixF
'- } +F3@-A } (t'hWS ']1\nJP[=X q[p+OpA /* e!
V`cg0 **TestMethod.java Yqz(@( % */ {<0=y#@u package NetFox; i5wXT +U/+iI>0 %!%G\nv public class TestMethod { \GYh"5 T0BFit6 [kwVxaI public TestMethod() ,!+>/RlJ { ///xx/weblogic60b2_win.exe -w
nlJi1f try{ <#AS[Q[N SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); =9$hZ c //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); gwE#,OY* SiteFileFetch fileFetch = new SiteFileFetch(bean); WE\@ArY> fileFetch.start(); ?U'c;*O- } pN# \ catch(Exception e){e.printStackTrace ();} zf-)c1$*r l>K z5re^ fwaq } !f5I.r~ d`]|i:*q j3{8]D public static void main(String[] args) 2eErvfC[ { YEfa8'7R new TestMethod(); w@&g9e6E } ph\KTLU } 0>hV?A 点击下载更多相关资料
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