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/* {9,!XiF.: **SiteFileFetch.java }+m")=1{ */ 17.. package NetFox; <'N(`.&3C import java.io.*; y8!#G-d5 import java.net.*; lQq&tz, Eq\PSa=gz .boBo$f
public class SiteFileFetch extends Thread { 6^Q/D7U;s rgK:ujzW! `"-ln'nw SiteInfoBean siteInfoBean = null; //文件信息Bean h(>eHP long[] nStartPos; //开始位置 P<OSm*;U: long[] nEndPos; //结束位置
f ecV[ FileSplitterFetch[] fileSplitterFetch; //子线程对象 7gx
7NDt long nFileLength; //文件长度 qs|{ boolean bFirst = true; //是否第一次取文件 k%gO
boolean bStop = false; //停止标志 e Lj1 File tmpFile; //文件下载的临时信息 6F)^8s02h DataOutputStream output; //输出到文件的输出流 $GI
jWlAh Pw:{ //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) g,YJh(|#{ public SiteFileFetch(SiteInfoBean bean) throws IOException T`7HQf ; { oRALhaI siteInfoBean = bean; Z=|NoDZ //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); yPmo@aw]1 tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); - Mubq if(tmpFile.exists ()) 5j{jbo=! { r2xXS&9!| bFirst = false; C-:lM1 read_nPos(); HO`N]AMw } CC~:z/4,N else +%'!+r
l { en?J#fz nStartPos = new long[bean.getNSplitter()]; c?/R=/H nEndPos = new long[bean.getNSplitter()]; |n/qJIE6 } !%lcn
O oLh2:c _[:>!ekx "gQ-{ W } ]E:K8E
3$yOv"` ~ZuFMVR public void run() ';>A=m9(4% { Bokpvd-c7 //获得文件长度 +5k^- //分割文件 |Q\O%
cb //实例FileSplitterFetch VUF$,F9 //启动FileSplitterFetch线程 h't!1u //等待子线程返回 4[P]+Z5b+ try{ j]X$7 if(bFirst) qtI42u{ { )/vse5EG+ nFileLength = getFileSize(); Ig{
3>vB if(nFileLength == -1) "rJJ~[Y { x&4gy%b System.err.println("File Length is not known!"); 7+Z%#G~T } g)M"Cx. else if(nFileLength == -2) hUo}n>Aa { v|K'M,E System.err.println("File is not access!"); 5Kw$QJ/ } /9 ^F_2'_ else }NgevsV>; { kHhxR;ymA7 for(int i=0;i<nStartPos.length;i++) {)5tov1 { n]Z() "D nStartPos = (long)(i*(nFileLength/nStartPos.length)); !^FR a{b } (=eJceE! for(int i=0;i<nEndPos.length-1;i++) P
=jRof$ { wa f)S= nEndPos = nStartPos[i+1]; ":meys6t# } Gkr?M^@K nEndPos[nEndPos.length-1] = nFileLength; }9FAM@x1K& } oz[Mt
i* } H-g
CY|W |3SM "+{>"_KV //启动子线程 9ZVzIv( fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; # ^q87y for(int i=0;i<nStartPos.length;i++) ,g~Iup { Kwmtt fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), F39H@%R siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), 921m'WE nStartPos,nEndPos,i); M}Obvl Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); )&F]j fileSplitterFetch.start(); HVLj(_
A } 9V0@!M8S // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), H(rK39Q siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); ENhKuX // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", z^z,_?q; nEndPos = " + nFileLength); 0Uf.aP // fileSplitterFetch[nPos.length-1].start(); )xxpO$ \ y}!yrQ _+*+,Vx //等待子线程结束 vP.^j7wB //int count = 0; \&jmSa=]l //是否结束while循环 :+?w> boolean breakWhile = false; NQu.%= (aUdPo8H^ d [f,Nu' while(!bStop) sn.0`Stt { *2^+QKDG write_nPos(); |1/UC"f Utility.sleep(500); ;%`oS.69 breakWhile = true; qdQQt5Y'm 98ot{+/LK p*5QV for(int i=0;i<nStartPos.length;i++) P
?A:0a { Muay6b? if(!fileSplitterFetch.bDownOver) WXmR{za { d$}!x[g$Z breakWhile = false; @ i*It Hk break; pW,)yo4 } 7
/7,55 } $TZjSZ1w if(breakWhile) #e*jP&1S break; 9%&
=n ?K!^[aO}= /t|Lu@&:Xo //count++; HOSt0IHzty //if(count>4) c_ Dg0 // siteStop(); bD:[r))#e } $GJuS^@% &$NYZ3?9 /3KPK4!m System.err.println("文件下载结束!"); O-,0c1ts } !eP)"YWI3 catch(Exception e){e.printStackTrace ();} $_Kcm"oj } Yj{-|2YzL E'iN==p_: m/bP`-/, //获得文件长度 EN-;@P9;C public long getFileSize() H/''lI{k) { $VNj0i. Pr int nFileLength = -1; yR$ld.[uf try{ jzb%?8ZJ URL url = new URL(siteInfoBean.getSSiteURL()); |6o!]~&e$1 HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); pybE0] httpConnection.setRequestProperty("User-Agent","NetFox"); #<o=W#[ X4dxH_@ n]x%xnt int responseCode=httpConnection.getResponseCode(); 8~j1 if(responseCode>=400) k}hTSL { G<W;HM j2 processErrorCode(responseCode); m'PU0x return -2; //-2 represent access is error i1JVvNMQ, } 0?Bv
zfb >)*0lfxTZ OSY.$$IO String sHeader; M"s+k >XJUj4B|X BIY"{"hJ for(int i=1;;i++) `_+% { pQCocy //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); PR3&LI;B* //Utility.log(in.readLine()); PdqyNn= sHeader=httpConnection.getHeaderFieldKey(i); ZE:!>VXa87 if(sHeader!=null) QruclNW{Bv { ?^gq if(sHeader.equals("Content-Length")) {JlSfJw! { qtlcY8! nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); L]Dq1q8` break; A/TCJ#>l } CNl @8&R } wBI>H
7A else A/sM
?!p>_ break; 3,y zRb } tRVz4fk[G } lnQY_~s catch(IOException e){e.printStackTrace ();}
IBYSI0 catch(Exception e){e.printStackTrace ();} a98J_^ n P^^WViVX {wh, "Ok_ Utility.log(nFileLength); GQ\;f gaWJzK
Yc_ i)q8p return nFileLength; *X\J[$! } :6jh*,OHZl 1!W'0LPM /N7.|XI. //保存下载信息(文件指针位置) :YCB23368" private void write_nPos() 0BPUbp( { 2?nEHIUT try{ cnz+%Y N output = new DataOutputStream(new FileOutputStream(tmpFile)); '1"vwXJ" output.writeInt(nStartPos.length); v(P5)R, for(int i=0;i<nStartPos.length;i++) g+]o=@ { iI Dun Ih // output.writeLong(nPos); ,FL*Z9wA output.writeLong(fileSplitterFetch.nStartPos); 3YD.Fjz$ output.writeLong(fileSplitterFetch.nEndPos); xQDWnpFc } gTb%c84 output.close(); .~,=?aq^ } -T2w?| catch(IOException e){e.printStackTrace ();} O"~CZh,:r} catch(Exception e){e.printStackTrace ();} KnC:hus } ZVz`g] _sK{qQxvM= $1Qcz,4B| //读取保存的下载信息(文件指针位置) yY_#fJj private void read_nPos() zuS4N?t`p { uc
Ph*M try{ B &e'n< DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); *~kHH int nCount = input.readInt(); |f3 :9(p nStartPos = new long[nCount]; O,Ej m<nt nEndPos = new long[nCount]; s"~3.J for(int i=0;i<nStartPos.length;i++) O+"a0:GM { 3(`P x} nStartPos = input.readLong(); rGlnu.mK^ nEndPos = input.readLong(); n;LjKE } a FL;E input.close(); a5?Yh<cJ } a=
(v S catch(IOException e){e.printStackTrace ();} \Vx_$E catch(Exception e){e.printStackTrace ();} 1ZY~qP+n+ }
wwE3N[ .u:aX$t+ :6J&%n
private void processErrorCode(int nErrorCode) R(f6uO!m { @?*;
-]#) System.err.println("Error Code : " + nErrorCode); ^$s&bH'8 } y I} > }H:wgy` LZDJ\"a- //停止文件下载 INY?@in public void siteStop() rE%HNPO { h_5CWQSi bStop = true; 2
ZyO for(int i=0;i<nStartPos.length;i++) oQ}K_}{> fileSplitterFetch.splitterStop(); 9qvl9,*g 8cGoo u6 Ey)ey-'\ } D2I|Z } 0UhJ
I //负责部分文件的抓取 7Y5.GW\^ **FileSplitterFetch.java N(%(B */ ZF@$3 package NetFox; Of>2 m< \. a 7F4h O9rA3qv
B import java.io.*; sGx3O i import java.net.*; 5zz">-Q ! >qZl
s' gxmY^"Jy public class FileSplitterFetch extends Thread { 06z+xxCo aSMoee@! hQeG#KQ String sURL; //File URL Ax*xa6_2 long nStartPos; //File Snippet Start Position mrBK{@n long nEndPos; //File Snippet End Position <R?S int nThreadID; //Thread's ID u.Tknw-X boolean bDownOver = false; //Downing is over s8dP=_ ` boolean bStop = false; //Stop identical Z1_F)5pn FileAccessI fileAccessI = null; //File Access interface :eIQF7- 0i>p1/kv ~ ReX$9 public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException >[l2KD { Y
h53Z"a this.sURL = sURL; J-qUJX~4c this.nStartPos = nStart; S6Y:Z0 this.nEndPos = nEnd; $\q.Zb nThreadID = id; f)mOeD*u| fileAccessI = new FileAccessI(sName,nStartPos);//定位 DFvGc`O4 } "^)GnK +- b[J0+l\!" /=g/{&3[a> public void run() -Jt36|O { Z!3R while(nStartPos < nEndPos && !bStop) 8nwps(3 { r7FJqd TfHL'u9B 4s@Tn>%SP try{ ^SK!?M URL url = new URL(sURL); *c
9S. HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); /vC!__K9: httpConnection.setRequestProperty("User-Agent","NetFox"); }X. Fm'` String sProperty = "bytes="+nStartPos+"-"; @^/aS;B$> httpConnection.setRequestProperty("RANGE",sProperty); ^7yaMB! Utility.log(sProperty); hkdF FY`t7_Y?GV $%4<q0- InputStream input = httpConnection.getInputStream(); Cbpz Yv32 //logResponseHead(httpConnection); Qq'e#nI@ GWLdz0`2_ =~5N/! byte[] b = new byte[1024]; 5H1N]v+ int nRead; _l+C0lQl= while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) &xZSM, { f8ZuG !U nStartPos += fileAccessI.write(b,0,nRead); U8-OQ:2. //if(nThreadID == 1) HD& Cp // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); T2_iH=u } ?#Y:2LqP C R x( yn ;G[0%z+* Utility.log("Thread " + nThreadID + " is over!"); ;WAa4r> bDownOver = true; 4I .'./u //nPos = fileAccessI.write (b,0,nRead); EwmNgmYq } I9m9`4BK catch(Exception e){e.printStackTrace ();} }9glr]= } jGT|Xo>t } hA;Ai:8 3V7WIj< R+_!FnOJ //打印回应的头信息 yz,0
S' U public void logResponseHead(HttpURLConnection con) H_Xk;fM { uUV"86B_ for(int i=1;;i++) , &n"# { XE&h&v=> String header=con.getHeaderFieldKey(i); |KVVPXtq%C if(header!=null) <sw=:HU //responseHeaders.put(header,httpConnection.getHeaderField(header)); A3*(c3 Utility.log(header+" : "+con.getHeaderField(header)); NCY2^ else hn\d{HP break; h-RhmQA=Iz } Sk)lT^by } (&v,3>3] }!?RB v'W Gs,e8ri! public void splitterStop() f/s" 2r { UR9\g( bStop = true; :H&G}T(# } a>rDJw: &W c$VDC !|j|rYi- } E m^Dg9 hgzNEx%^q qozvNJm) /* y. 1F@w| **FileAccess.java 2i;ox*SfpU *//文件访问(定位,写) cD=IFOB*GD package NetFox; NUJ $)qNA import java.io.*; ly35n` aC%Q.+-t
Jgg< u# public class FileAccessI implements Serializable{ KU*aJl_n, 4=EA3`l //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 13w(Tf RandomAccessFile oSavedFile; 4T;<`{] long nPos; $d!Vx m H5 &._ co1aG,>"q public FileAccessI() throws IOException rZcSG(d`53 { tbiM>qxB this("",0); k#u)+e.' } D6|-nl 0xO*8aKT n\V7^N public FileAccessI(String sName,long nPos) throws IOException /nu z_y\J { ,hT.Ok={36 oSavedFile = new RandomAccessFile(sName,"rw"); 1r_V$o$ this.nPos = nPos; ;ISe@yR; oSavedFile.seek(nPos); k<CbI
V } mF|KjX~s )7[#Ti u"m(a:jQ public synchronized int write(byte[] b,int nStart,int nLen) m(}}%VeR"z { 2 int n = -1; A<"<DDy try{ {:#nrD" oSavedFile.write(b,nStart,nLen); >iRkhA=Vg n = nLen; &"I csxG } Dg"szJ-
catch(IOException e) K)se$vb6 { FpU8$o~r{ e.printStackTrace (); Q;!rN) } m{?f,Q=u@ uwr7 .\7 mo] l_' return n; y1T(R# } g>;@(:e^/ ;^0rY )& 4#7*B yvf } QIlZZ %>_6&A{K,d z7gX@@T /* r
1jt~0&K **SiteInfoBean.java vJ=Q{_D=\ */ CswKT9 package NetFox; i%i/>;DF 1JfZstT 0Ci/-3HV! public class SiteInfoBean { {>9ED.t |3yG #0Y_!'j private String sSiteURL; //Site's URL %Nvw`H private String sFilePath; //Saved File's Path +egwZ$5I private String sFileName; //Saved File's Name n*A1x8tn private int nSplitter; //Count of Splited Downloading File _oCNrjt9 {\%I;2X XD|g G public SiteInfoBean() x: _[R{B {//nSplitter的缺省值为5 `OWHf?t: //default value of nSplitter is 5 y%;o this("","","",5); q~[sKAh } mfaU_Vo& uf9&o# QDV+( public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) {?IbbT { 9A} * sSiteURL= sURL; #Xox2{~ sFilePath = sPath; FE&:? sFileName = sName; F;8Q`$n this.nSplitter = nSpiltter; P/|1,Sk c$71~|-[ K)~a H } {vCtp oD9n5/ozo _"L6mcI6 public String getSSiteURL()
o0f`/
6o { y32$b,%Xi, return sSiteURL; &0qpgl| } )Hmf=eoc vno/V#e$WX e]1Zey public void setSSiteURL(String value) ^N|8
B?Vg {
v[^8_y}A` sSiteURL = value; ~"#HHaBO# } L*[3rqER Yg3nT:K_Y& W_JO~P public String getSFilePath() y^`JWs, { Y.]$T8 return sFilePath; X_hDU~5{wC } !Kg']4 ?\, ^>4x? usD@4!PoA public void setSFilePath(String value) -Z$u[L [c { aE9Y
|6 sFilePath = value; =!^
gQ0~4 } QO(F%&v++ !p/?IW+ ?`rAO#1 public String getSFileName() VDbbA\ { v#/Gxk9eX return sFileName; @|c]) } QR'# ]k;>% w"s@q$}]8M FZj>N( public void setSFileName(String value) k-=LD { aW&)3C2-x sFileName = value; II}M|qHaK } iP"sw0V8 +|,4g_(j %csrNf public int getNSplitter() Dz6xx? { 3yKmuu! return nSplitter; rFQWgWD } n@p@@ ={zTQ+7S` 3EICdC
public void setNSplitter(int nCount) ^.!jD+=I { hyf
;f7`o nSplitter = nCount; 71{jedT } A+0-pF2D } r.\L@Y< K8&;B)VT> % (y{Sca /* Bso#+v5 **Utility.java A,c XN1V */ qGV_oa74 package NetFox; V>`ANZ4 Fds
11
/c7 =oq8SL?bJ* public class Utility { lt&(S) "U-jZ5o" j/*1zu8Y public Utility() *b.
> { nJ2x;';lA g=56|G7n i#`q<+/q } \H@1VgmR; c_D(%Vf5 //线程睡眠 _b~{/[s public static void sleep(int nSecond) *c94'T cl { *kl :/# try{ $}gMJG Thread.sleep(nSecond); k_=yb^6[U } Ptv'.<- catch(Exception e) T+F]hv' { 0\= du e.printStackTrace (); Tn#Co$< } rQVX^ } {}$7B p EyE#x_A //日志 Z_\p8@3aH public static void log(String sMsg) MVsFi]- { akzGJ3g System.err.println(sMsg); 4\Y5RfLB_ } 0+* NHiH pi?MAE*f Gs,:$Im public static void log(int sMsg) -V|"T+U { %'=*utOxy System.err.println(sMsg); zXn-E } PC#^L$cg} } #_wq#rF $ s/E}X >5t%_/yeB /* 64zOEjra **TestMethod.java 5*pzL0,Y */ AAevN3a#nI package NetFox; vt|R)[, g4[VgmhJ !wfW0?eu public class TestMethod { 9Ux( GkIY2PD N7+L@CC6T public TestMethod() 6QX m]<
{ ///xx/weblogic60b2_win.exe `OBzOM try{ YNEwX$)M,B SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); JNfL
jfE)< //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); ?BnU0R_r] SiteFileFetch fileFetch = new SiteFileFetch(bean); (j&: fileFetch.start(); ,yYcjs!=o } 4N,mcV catch(Exception e){e.printStackTrace ();} EO&Q "]+g5G JL1ajlm~ } WEimJrAn ^Co$X+
>X*tMhcb public static void main(String[] args) 7MKX`S { hzqJ! new TestMethod(); h xO}'`: } bO=|utpk } h+FM?ct6} 点击下载更多相关资料
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