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/* U0N 60 **SiteFileFetch.java xRLT=.ir */ aH/
k Ua package NetFox;
k5.Lna import java.io.*; 'op|B@y import java.net.*; ;P%1j| 7 [;),\\u,d ~<F8ug# public class SiteFileFetch extends Thread { 9H`XeQ. |_aa&v~ GH:jH]u!V SiteInfoBean siteInfoBean = null; //文件信息Bean ]R f[y long[] nStartPos; //开始位置 zL `iK"N` long[] nEndPos; //结束位置
MC.)2B7 FileSplitterFetch[] fileSplitterFetch; //子线程对象 ofw3S|F6 long nFileLength; //文件长度 V7fq4O^: boolean bFirst = true; //是否第一次取文件 ::{Q1F boolean bStop = false; //停止标志 2?ez,*-[ File tmpFile; //文件下载的临时信息 UIN<2F_ DataOutputStream output; //输出到文件的输出流 hAnPXiD
>rKIG~P_ //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) !0L Wa" public SiteFileFetch(SiteInfoBean bean) throws IOException My[pr_xg { ;LSANr& siteInfoBean = bean; (b-MMr //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); c>:wd@w tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); 9} M?P if(tmpFile.exists ()) Hp!-248 S { k],Q9 bFirst = false; rgtT~$S read_nPos(); =BAW[%1b } 0e ~JMUb else Z!zF\<r { 3/e.38m| nStartPos = new long[bean.getNSplitter()]; 7XLtN "$$ nEndPos = new long[bean.getNSplitter()]; -Xm'dwm } RF4vtQC= 9FYUo tKx~1- gS]@I0y8
. } ZWU)\}}_R n QZwC
,I(d6 public void run() /quc}"__ { gANuBWh8T //获得文件长度 J^5So //分割文件 e9 5Lo+:f //实例FileSplitterFetch O-GJ- //启动FileSplitterFetch线程 &LZn
FR //等待子线程返回 {xB!EQ" try{ s.N/2F&*W if(bFirst) Pz |>"' { q{I%Q)t)gU nFileLength = getFileSize(); 1
A
!bE if(nFileLength == -1) j2.|ln"! { O{G?;H$ System.err.println("File Length is not known!"); YPK(be_|I } =llvuUd\n else if(nFileLength == -2) pF:$
ko { m6&~HfwN System.err.println("File is not access!"); ;jvBF4Lb> } l2rd9-T else #;qdY[v { 1AfnzGvA for(int i=0;i<nStartPos.length;i++) lC("y'
:: { a85$K$b> nStartPos = (long)(i*(nFileLength/nStartPos.length)); xU>WEm2 } a# y;dK for(int i=0;i<nEndPos.length-1;i++) l%pu HZ)t { 5Y'qaIFR nEndPos = nStartPos[i+1]; n :\~'+$ } xH(lm2kvT nEndPos[nEndPos.length-1] = nFileLength; 9_rYBX } NAQAU
*yP } E+R1 !. )Y6 + i6tf2oqO7 //启动子线程 ith
3=`3 fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; Bp`] for(int i=0;i<nStartPos.length;i++) kmsb hYM) { I{9QeRI fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), >WQMqQ^t@ siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), NI}yVV nStartPos,nEndPos,i); st3l2Q Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); EZy)A$| fileSplitterFetch.start(); QP^Cx= } l7259Ro~ // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), ]&xk30 siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); otl0JHt*+ // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", _jI,)sr4ic nEndPos = " + nFileLength); AOWmzu{zw // fileSplitterFetch[nPos.length-1].start(); zRl3KjET :W:K:lk lhz{1P]s //等待子线程结束 qL&[K>2z //int count = 0; EC6DW= //是否结束while循环 DV+xg3\(>1 boolean breakWhile = false; ox>^>wR* .TMs bZ|j ^aMg/.j while(!bStop) 5uNJx5g { 4 \K7xM! write_nPos(); S)k*?dQ##R Utility.sleep(500); *1
]uH e breakWhile = true; EXwo,?I >CgTs 1i"WDu*h3 for(int i=0;i<nStartPos.length;i++) 5k3n\sqZA { <fjX[l<Uz if(!fileSplitterFetch.bDownOver) {3p4:*} { Av$^ breakWhile = false; 7 60Y$/Wz break; ?m=N]!n } 1k5Who@ } :q7Wy&ow if(breakWhile) dh*ZKI^@( break; UcDS9f_87 *_{j=sd [vK^Um //count++; |zNX=mAV //if(count>4) _AYK435>N // siteStop(); o\<ULW* } *@r/5pM2} }bpQq6ZF +L|?~p`V System.err.println("文件下载结束!"); M~#g RAUJ } %@ODs6 R0 catch(Exception e){e.printStackTrace ();} mpEK (p } p2[n$61 _476pZ_ N/'b$m5=
S //获得文件长度 sw oQ' public long getFileSize() BB$>h} { d>&,9c% int nFileLength = -1; #m<nAR try{ kr5">"7 URL url = new URL(siteInfoBean.getSSiteURL()); VimE@ Hz HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); He/8=$c% httpConnection.setRequestProperty("User-Agent","NetFox"); qu6D 5t 7qLpZ/ C12Fl int responseCode=httpConnection.getResponseCode(); Nw/ ku if(responseCode>=400) eKLZt%= { `$<.pOm processErrorCode(responseCode); | '8Nh return -2; //-2 represent access is error Nk
8 B_{ } O67W&nz mPK:R^RjG& o>i4CCU+ String sHeader; g i-$ZFzB
4*#18<u5 H8zK$! for(int i=1;;i++) V)-+Fd,= { V-2(?auZd //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); |t&>5HM //Utility.log(in.readLine()); _LUhZlw sHeader=httpConnection.getHeaderFieldKey(i); \0I_< if(sHeader!=null) ,RI Gc US { VUGmi]qd if(sHeader.equals("Content-Length")) I-)+bV
G { 4Zddw0|2 nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); GL0L!="! break; bMu+TgAT, } vHc%z$-d } qzLPw*; else SC!RbW@3 break; #ut } ]e^&aR5f" } Jk11fn;\> catch(IOException e){e.printStackTrace ();} J T7nG.9 catch(Exception e){e.printStackTrace ();} G1tY) _-8[ o5O#vW2Il& I)6+6pm Utility.log(nFileLength); 9dLV96 KVaiugQ *3FKt&v 0 return nFileLength; 2'\H\| } dNH08q8P g\:[
55;8 1~`fVg //保存下载信息(文件指针位置) cN6X#D private void write_nPos() EhvX)s { %y[h5*y* try{ DGF5CK.O output = new DataOutputStream(new FileOutputStream(tmpFile)); E \EsWb output.writeInt(nStartPos.length); glxsa8 for(int i=0;i<nStartPos.length;i++) ~2N"#b&J { J#(LlCs?@c // output.writeLong(nPos); j#x6
output.writeLong(fileSplitterFetch.nStartPos); RFc v^Xf output.writeLong(fileSplitterFetch.nEndPos); 9uO 2Mm } IGQFtO/x output.close(); RnE4<Cy } v^NIx q}U catch(IOException e){e.printStackTrace ();} >J?fl8 catch(Exception e){e.printStackTrace ();} o4,6.1} } SmH=e@y~Lx /NFj(+&g+ Fb>?1i`RN //读取保存的下载信息(文件指针位置) 1{.|+S Z! private void read_nPos() `?@}>. { u@M,qo` try{ ]Sz:|%JP1 DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); MYvY]Jx3 int nCount = input.readInt(); n\'4 nStartPos = new long[nCount]; B{#I:Rs9 nEndPos = new long[nCount]; @ioJ]$o7 for(int i=0;i<nStartPos.length;i++) [ 5b--O { [ /b2=> nStartPos = input.readLong(); j0aXyLNX nEndPos = input.readLong(); lU\[aNs } ]^7@}Ce_ input.close(); L}b.ulkMD } !hy-L_wL] catch(IOException e){e.printStackTrace ();} ! E5HN :# catch(Exception e){e.printStackTrace ();} Vwf$JdK%&l } 3M7/?TMw{6 H@>` F i$#;Kpb`^ private void processErrorCode(int nErrorCode) 5H9z4-i x? { lNh70G8^p System.err.println("Error Code : " + nErrorCode); AKfDXy } Eyqa?$R C2I_%nU Z1 p%Vt#?q //停止文件下载 &`r-.&Y public void siteStop() -3*]G^y2 { mdg8,n bStop = true; k%#EEMh for(int i=0;i<nStartPos.length;i++) 4.aZ#c91_ fileSplitterFetch.splitterStop(); FVbb2Y?R f~R(D0@ /-'}q=M } %)1?TU } ;[YG@-"XZ //负责部分文件的抓取 fU}ub2_in **FileSplitterFetch.java "+nRGEs6 */ @*XV`_!h package NetFox; 4e7-0}0 MJO-q $)c ksUcx4;a@F import java.io.*; -d/
=5yxL import java.net.*; d&Zpkbh" yx[/|nZDC4 '<)n8{3Q5w public class FileSplitterFetch extends Thread { Q&tG4f< L`TLgH&?R U'_Q>k String sURL; //File URL ET*SB long nStartPos; //File Snippet Start Position Of#u long nEndPos; //File Snippet End Position Mfuv0P~ int nThreadID; //Thread's ID 4F:\-O boolean bDownOver = false; //Downing is over f'RX6$}\1X boolean bStop = false; //Stop identical R) h#Vc( FileAccessI fileAccessI = null; //File Access interface 'JE`(xD V=l0(03j~ Ic<2QknmP public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException Wvh#:Z { `$9x 1dx this.sURL = sURL; i&fuSk EP this.nStartPos = nStart; &6!)jIWJ this.nEndPos = nEnd; v{4$D~I nThreadID = id; K5h fileAccessI = new FileAccessI(sName,nStartPos);//定位 BDDlQci38 } O0v}43J[ F/{!tx T'9'G
M public void run() Sz`,X0a { t3_O H^ while(nStartPos < nEndPos && !bStop) ;[DU%f { zC!t;*8a $h"\N$iSq
9cF[seE"0 try{ ]%H`_8<gc URL url = new URL(sURL); >tr}|> HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); tDcT%D {: httpConnection.setRequestProperty("User-Agent","NetFox"); q<|AZ2Ai String sProperty = "bytes="+nStartPos+"-"; #trK^( httpConnection.setRequestProperty("RANGE",sProperty); (?c"$|^J Utility.log(sProperty); Btn?N 7n<{tM !Ai@$tl[S InputStream input = httpConnection.getInputStream(); [9L:),&u
//logResponseHead(httpConnection); FW4<5~'
W{+2/P 3nQ`]5.Q
w byte[] b = new byte[1024]; \M^bD4';> int nRead; Qw*|qGvy^ while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) 4+8@`f>s { f$$ /H>MJ nStartPos += fileAccessI.write(b,0,nRead); {;1\+f //if(nThreadID == 1) H7n>Vx:L- // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); 8GUX{K } C1)!f j= k y7Gwc vk^xT Utility.log("Thread " + nThreadID + " is over!"); n 7[V&`e_ bDownOver = true; 1Pu~X
\sO //nPos = fileAccessI.write (b,0,nRead); lL3U8}vn } *g2x%aZWbG catch(Exception e){e.printStackTrace ();} Jnov<+ } V 5mTP' } u6JM]kR V)25$aKW7 }Sv:`9= //打印回应的头信息 Y$_B1_ public void logResponseHead(HttpURLConnection con) wc4=VC"y { 0GeTSFj for(int i=1;;i++) WOap+ { TC*g|d @b String header=con.getHeaderFieldKey(i); )y$(AJx$ if(header!=null) #"~<HG}bR/ //responseHeaders.put(header,httpConnection.getHeaderField(header)); y<Ot)fa$ Utility.log(header+" : "+con.getHeaderField(header)); ~c `l@: else "
H\k`.j break; UCj ld } g($2Dk_F2 } NBGH_6DROw e\L8oOk#r YOO+R{4( public void splitterStop() ?e 4/p { 5\nAeP bStop = true; F )eelPZ+, } 4V`G,W4^J c^W)07-X5y a:w#s}bL } &^jXEz; ` Sz}`+E _t^&Ah* /* Dlvz) **FileAccess.java NzvXN1_% *//文件访问(定位,写) k<?b(&`J package NetFox; \9T7A& import java.io.*; K$=zi}J W 6'f;-2 Q$"D]!G public class FileAccessI implements Serializable{ FYQS)s ;2QP7PrSY //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 |A(Iti{v RandomAccessFile oSavedFile; tCt#%7J;a long nPos; eaU p`qgrI` ?:0Jav public FileAccessI() throws IOException Mo|2}nf { (E1~H0^ this("",0); >m\(6x8RE } m8[j #=h OjA,]Gv6 ");a3hD public FileAccessI(String sName,long nPos) throws IOException `R^g U]Z, { $6IJP\ oSavedFile = new RandomAccessFile(sName,"rw"); Nh+ H 9 this.nPos = nPos; 5z)~\;[ - oSavedFile.seek(nPos); } Q+|W=2t } JBZ@'8eqi] WcGS9`m/ @=u3ZVD public synchronized int write(byte[] b,int nStart,int nLen) ns4,@C$ { I>$&-i int n = -1; OY({.uV dX try{ hDGF7 oSavedFile.write(b,nStart,nLen); >H,*H;6 n = nLen; owv[M6lbD } ^-'fW7[m catch(IOException e) _yR^*}xJb { K3uRs{l| e.printStackTrace (); Tlr v={ } uB?ZcF}Tk "0TZTa1e !;'=iNOYR return n; lp8v0e4 } dj%!I:Q>u <1!O1ab A3*!"3nU } X@FN|Rdh 8 Fbo3 hi[pVk~B) /* 5!9zI+S|=` **SiteInfoBean.java Flb&B1 */ xgtR6E^k package NetFox; EoDA]6?Lj -UT}/:a O#r%>;3* public class SiteInfoBean { ;dhQN}7 &%Tj/ Qx V(*(F7+ private String sSiteURL; //Site's URL cB&:z)i4 private String sFilePath; //Saved File's Path zbPqYhJzA private String sFileName; //Saved File's Name RD&PDXT4 private int nSplitter; //Count of Splited Downloading File Z3!`J& apxph2yvS u]@['7 public SiteInfoBean() wz8yD8M {//nSplitter的缺省值为5 )!T/3|C //default value of nSplitter is 5 Xn
;AZu^'R this("","","",5); A+{VGP^ } (7*}-Uy[C 6W
UrQFK xkAK!uVy public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) bZV/l4TU { jz0T_\8D` sSiteURL= sURL; 3;Fhg!ZO sFilePath = sPath; vvOV2n.WD sFileName = sName; B>.qd this.nSplitter = nSpiltter; zx7{U8*`< &kw@,];4Z 5kXYeP3: } ehY5!D1Q Rlirs-WQ :Ux_qB public String getSSiteURL() 8~gLqh8^V { "zy7C*)>r return sSiteURL; #LOwGJ$yVz } 40
0#v|b v.5+7,4 YK~%x o public void setSSiteURL(String value) 1-QS~)+ { EJ@ ~/)< sSiteURL = value; ~PNub E } W@!S%Y9 ;9g2?-svw
OZ!^ak public String getSFilePath() 4E?Oky#}- { 6LZ;T.0o return sFilePath; S21,VpW\ } ^Zp>G{QL{ dcT80sOC
j
<RrLn_ public void setSFilePath(String value) _<2E"PrT { 0qT%!ku& sFilePath = value; Wo,?+I } 29q _BR *: Z EO WO ^G-@06 /! public String getSFileName() C"enpc_C/ { }:#P)8/v>% return sFileName; =mmWl9'mJ } ^zgo#J5O C{wEzM: M&
CqSd public void setSFileName(String value) \5cpFj5% { n{SJ_S#a.a sFileName = value; A.w:h;7 } Dn }Jxu'( 2dgd~
!5?<% * public int getNSplitter() *_g$MI { YT8F#t8 return nSplitter; 3{(/x1a,4 } ua `RJ NW)1#]gg% gv{ >`AN public void setNSplitter(int nCount) j1HW._G { ^y4Z+Gu[ nSplitter = nCount; /|&*QLy } kz7(Z'pw } Fea(zJ_ /JU.?M35 Oz#{S:24M+ /* vSLtFMq^( **Utility.java G<;*SYAb */ c_l"I9M#r package NetFox; ji,kkipY?w RY*U"G0#w qb` \)X]9 public class Utility { EDs\,f} ,3 u}x, O%HHYV%[m public Utility() ,wdD8ZT'Ip { hwNf~3eJk h3@v+Z<} t<?,F } Y:)e(c"A B^jc3 VsR //线程睡眠 fa2kG&, _ public static void sleep(int nSecond) S`m]f5u| { BJo*'US-Q try{ "8zDbdK Thread.sleep(nSecond);
^L&iR0 } , SnSW-P catch(Exception e) K,:N { 63x?MY6 e.printStackTrace (); '>C5-R:O } yJe>JK~) } Ok\7y-w^ njA#@fU //日志 Nu~lsWyRI5 public static void log(String sMsg) % +\."eC { Hg (Gl System.err.println(sMsg); =zs`#-^8 } ]L}dzA?: j^2j&Ta U_c *6CK public static void log(int sMsg) DkAAV9* { yyy|Pw4:Z System.err.println(sMsg); I[X772K } 6Sn .I1Wy } r0 uwPf NSA-}2$ Tc3yS(aq /* liz~7RY4 **TestMethod.java WvZ8/T'x */ 0NX,QD package NetFox; c_!cv":s l0i^uMS "i W"NFO public class TestMethod { g5r(>, vY ! #2{hQRu lBGQEP3; public TestMethod() .y:U&Rw4 { ///xx/weblogic60b2_win.exe mBON$sF| try{ b<gr@ WF SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); >!)DM]Ri //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); Jma1N;d SiteFileFetch fileFetch = new SiteFileFetch(bean); P\)iZiGc fileFetch.start(); cD'V>[h } fw{gx catch(Exception e){e.printStackTrace ();} Q6I:"2u1 :tv,]05t Vj>8a)"B5a } 4d;8`66O gEE\y{y by/jYg)+ public static void main(String[] args) Hc(OI|z~ { kt$jm)UI~l new TestMethod(); L4y4RG/SJ: } x0:m-C } ))'<_nD 点击下载更多相关资料
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