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/* L6>pGx **SiteFileFetch.java g'];Estb~ */ mAk{"65V package NetFox; .qk]$LJF7 import java.io.*; eMRar<)+#* import java.net.*; `.y}dh/+0W d--y x.1-)\ public class SiteFileFetch extends Thread { !ZDzEP* ]pEV}@7 : S$l"wrh\ SiteInfoBean siteInfoBean = null; //文件信息Bean a?yMHb{F long[] nStartPos; //开始位置 Z ,^9Z long[] nEndPos; //结束位置 2iu_pjj FileSplitterFetch[] fileSplitterFetch; //子线程对象 ]nhr+;of/- long nFileLength; //文件长度 b;|55Y boolean bFirst = true; //是否第一次取文件 KYJjwXT28W boolean bStop = false; //停止标志 K/ &?VIi`z File tmpFile; //文件下载的临时信息 ND<!4!R^ DataOutputStream output; //输出到文件的输出流 8@NH%zWBp :Q+5,v-c //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) I ];M7 public SiteFileFetch(SiteInfoBean bean) throws IOException ylKmj]A { 9+,R`v siteInfoBean = bean; t6c<kIQ:-O //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); v){ .Z^_C tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); jkiTj~WE- if(tmpFile.exists ()) I8OD$`~*U6 { uS&|"*pR bFirst = false; Ax oD8| read_nPos(); M5T9JWbN } xoB},Xl$D else k%[3Q>5iM { xUF_1hY nStartPos = new long[bean.getNSplitter()]; RvJ['(- nEndPos = new long[bean.getNSplitter()]; 6.t',LTB } I2(zxq&2M\ :a:[. iVB^,KQ@ V8=Y@T, } C8a*Q" D71;&G]0 (h']a! public void run() IPuA#C { 6)pH|d.FR //获得文件长度 w@2Vts //分割文件 reo{*)% //实例FileSplitterFetch (I@bkMp //启动FileSplitterFetch线程 E^w:KC2@ //等待子线程返回 ZxGP/D try{ = sAn,ri if(bFirst) p8wyEHB { 2tayP@$ nFileLength = getFileSize(); \b[9ebME if(nFileLength == -1) )a}"^1 { \U%#nU{ System.err.println("File Length is not known!"); %iJ%{{f` } (2?G:+C 7 else if(nFileLength == -2) W:i?t8y\y { z}SND9-" System.err.println("File is not access!"); PLM _#+R> } 1
4LI5T else *zO&N^X.4 { cYNJhGY for(int i=0;i<nStartPos.length;i++) ,?
E&V_5 { 9>/wUQs!] nStartPos = (long)(i*(nFileLength/nStartPos.length)); iE0ab,OF } \3Oij^l0 for(int i=0;i<nEndPos.length-1;i++) @|yeqy_: {
2?Ye*- nEndPos = nStartPos[i+1]; ry};m_BY } =Nz0.: nEndPos[nEndPos.length-1] = nFileLength; !gwjN_ZJ^ } 3E}EBJLsZ } D j\e@?Y DjMf,wX-{ (Lh#`L?x //启动子线程 s!/TU{8J fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; I[o*RKT'" for(int i=0;i<nStartPos.length;i++) {Hr$wa~ { wLuv6\E fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), {|9}+
@5Q1 siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), 4t4olkK3Oa nStartPos,nEndPos,i); "S~_[/q Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); (_*
wt]"' fileSplitterFetch.start(); A`O <6
} +.[\g|G // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), _9:@Vl]Q@ siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); xChI,~i // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", lA>\Ko nEndPos = " + nFileLength); j:5%ppIY // fileSplitterFetch[nPos.length-1].start(); ,1Qd\8N9 31Cq22" {5c]Mn"r //等待子线程结束 N#N0Q0W= //int count = 0; X7UBopm& //是否结束while循环 EjEFg#q boolean breakWhile = false; <<MjC5 I
5ag6l _i}wK?n while(!bStop) L{g E'jCC { ,xJrXPW write_nPos(); rl:KJ\*D Utility.sleep(500); b syq* breakWhile = true; G,&%VQ3P> 8F;>5i zIQzmvf for(int i=0;i<nStartPos.length;i++) _BnTv$.P { E]^5I3=O if(!fileSplitterFetch.bDownOver) /I&wj^ { _17|U K|N breakWhile = false; e^).W3SK] break; Z+s%;f; } @-.? B } Z\X'd_1! if(breakWhile) qZ2&Xw.{1 break; ScnY3&rc toa-Wa{ 8uG0^h} //count++; _3Q8n| //if(count>4) Mjpo1dw // siteStop(); @b!"joEy } WoL9V"] B_3QQtjAl exR^/|BR System.err.println("文件下载结束!"); O^{1RV3:,T } t7#lsd`_ catch(Exception e){e.printStackTrace ();} WbjF]b\ } #/J
'P[z upn8n vy4( 8?TKN~ja //获得文件长度 U/MFhD(06 public long getFileSize() ateUpGM QU { aP~gaSx int nFileLength = -1; ph30'"[Z} try{ Qb^q+C)o] URL url = new URL(siteInfoBean.getSSiteURL()); wN]J8Ir HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); ;M
v~yb3v httpConnection.setRequestProperty("User-Agent","NetFox"); {'3D1#SK ,-*iCs< u7]<=*V] int responseCode=httpConnection.getResponseCode(); _45cH{$sA if(responseCode>=400) O@U?IF$ { ,^T]UHRO processErrorCode(responseCode); $B\E.ml. return -2; //-2 represent access is error |:iEfi]j } }#9(Mul Unl?fXI ='Oj4T String sHeader; H;vZm[\0N- ~2%3FV^ Rmh*TQu for(int i=1;;i++) Vk<k +=7 { \&|CM8A //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); ?_4^le[; //Utility.log(in.readLine()); :F|\Ij0T sHeader=httpConnection.getHeaderFieldKey(i); *c]KHipUIS if(sHeader!=null) <,39_#H?F3 { W04av_u 5 if(sHeader.equals("Content-Length")) P;foK)AM { i&ts YnP2 nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); y,C!9l break; >Gd.&flSj } u]vPy
ria } k'13f,o} else Y5TS>iEE] break; swr"k6;G } 2bQ/0?.).- } s"mFt{Y catch(IOException e){e.printStackTrace ();} H:}}t]E catch(Exception e){e.printStackTrace ();} DnyYMe!r `q?RF+ ~
l )t|'6 Utility.log(nFileLength); $+VgDe5{S tP'GNsq+m XI}I.M return nFileLength; mY2:m(9"5 } )h"Fla }""p)Y& XeUprN //保存下载信息(文件指针位置) 8fO8Dob]\Y private void write_nPos() XL"=vbD { v&0d$@6/U try{ >q|Q-I~gs output = new DataOutputStream(new FileOutputStream(tmpFile)); PZ]5Hf1" output.writeInt(nStartPos.length); Kdt|i93 for(int i=0;i<nStartPos.length;i++) o<\6Rm { <c%n?QK{ // output.writeLong(nPos); ;~ee[W$1 output.writeLong(fileSplitterFetch.nStartPos); /Dd\PjIH{ output.writeLong(fileSplitterFetch.nEndPos); pcpxe&S } kyAs'R@z output.close(); `!Ln|_,d } Y^eX@dEFR catch(IOException e){e.printStackTrace ();} u~Lu<3v catch(Exception e){e.printStackTrace ();} x`2pr } x70N8TQ_gK -uR{X G. D mTd<2Hy //读取保存的下载信息(文件指针位置) #eEvF private void read_nPos() g~R/3cm4 { Uz>Yn&{y6 try{ ~= 9Vv DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); 02M7gBS int nCount = input.readInt(); &t[|%c*D& nStartPos = new long[nCount]; gHH&IzHF nEndPos = new long[nCount]; TNsg pJ?\ for(int i=0;i<nStartPos.length;i++) b+$o4l/x { HWbBChDF nStartPos = input.readLong(); (4ZLpsbJ nEndPos = input.readLong(); aJQXJ,>Lv } # ITLz!gE input.close(); s>J3\PC } ;G Qm[W([ catch(IOException e){e.printStackTrace ();} fk\5D[j^ catch(Exception e){e.printStackTrace ();} 6aSM*S) } _h~p:= c%yh(g fv|%Ocm private void processErrorCode(int nErrorCode) 1}DerX 6 { :|($,3* System.err.println("Error Code : " + nErrorCode); It\BbG= } -d_ 7*>m$ &Q+]t"OA! w%~qB5wF6 //停止文件下载 Zjt9vS) public void siteStop() R`3x=q
{ JJNmpUJ bStop = true; |0DP}
`~ for(int i=0;i<nStartPos.length;i++) Bfn]-]>sD fileSplitterFetch.splitterStop(); CRd_} -&7=uRQk e@+v9Bs]q } Ei~]iZ} } yUj;4vd //负责部分文件的抓取 o3= .T+B **FileSplitterFetch.java '}fel5YV */ 5Q;dnC package NetFox; [wIKK/O -g$OOJB6 _X?y,# import java.io.*; z=%IcSx; import java.net.*; &08Tns" 8tC + lc 5D-BIPn=JV public class FileSplitterFetch extends Thread { clC~2:
3:"AFV kFnUJM$r String sURL; //File URL (Z'WR long nStartPos; //File Snippet Start Position 3li q9P_ long nEndPos; //File Snippet End Position a(g$ d2H int nThreadID; //Thread's ID iUpSN0XkMM boolean bDownOver = false; //Downing is over KwQXA' boolean bStop = false; //Stop identical +}\29@{W FileAccessI fileAccessI = null; //File Access interface i63?" vnF g%M! M +\rX1T public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException >pa\n9=Q^ { =Y:5,.U this.sURL = sURL; @Z,qu2~|! this.nStartPos = nStart; (OQi%/Oy this.nEndPos = nEnd; q>c+bo
6 nThreadID = id; h#;?9DP fileAccessI = new FileAccessI(sName,nStartPos);//定位 [I_BCf } a\Tr!Be, bL#sn_(m J;7s/YH^ public void run() @b8X%0B7 { ScsWnZ while(nStartPos < nEndPos && !bStop) u`nt\OF { '|J) ds ,%.:g65% d7\k gh try{ ;q'DGzh URL url = new URL(sURL); y K=S!7p\ HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); |\rSa^:5 httpConnection.setRequestProperty("User-Agent","NetFox"); /;[}=JL<Q String sProperty = "bytes="+nStartPos+"-"; }q/(D? httpConnection.setRequestProperty("RANGE",sProperty); pEJ#ad Utility.log(sProperty); TIKEg10I fWqv3nY^ <b3x(/ InputStream input = httpConnection.getInputStream(); ;cnnqT6 //logResponseHead(httpConnection); +q$xw}+PK _Eszr(zJ j#4+- byte[] b = new byte[1024]; ,K`E&hS int nRead; <tGI]@Nwk while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) #IbS { m`[oT\ nStartPos += fileAccessI.write(b,0,nRead); cYE./1D a //if(nThreadID == 1) i=x.tsJ:hB // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); ?hP<@L6K } \IO$+Guh {c&qB`y<. 5F% h>tqh Utility.log("Thread " + nThreadID + " is over!"); jM{(8aUG bDownOver = true; ^n6)YX //nPos = fileAccessI.write (b,0,nRead); d%S=$}o } [BJ$|[11 catch(Exception e){e.printStackTrace ();} rDK;6H:u{ } $:T<IU[E } *vRNG 3D/ dxk;@Tz "
&_$V@S //打印回应的头信息 _K*\}un2 public void logResponseHead(HttpURLConnection con) &?}kL=
h { 5B8V$ X for(int i=1;;i++) TW'E99wG { e4[-rkn{hl String header=con.getHeaderFieldKey(i); `%KpTh if(header!=null) 0\8*S3,q //responseHeaders.put(header,httpConnection.getHeaderField(header)); VyB\]EBu Utility.log(header+" : "+con.getHeaderField(header)); -G(3Y2 else l{M;PaJ`} break; )Ix-5084 } @>qx:jx(-S } /5L' 9e UIC\CP d +,ZUTG public void splitterStop() 7yc9`j}] { *%P>x}6w3 bStop = true; ^.ZSpc}< } !:]s M-cCt >!:$@!6L 2GHXn:V } i*mZi4URN
'7S!6kd? 34/]m/2NZK /* lBizC5t!o **FileAccess.java 4*@G&v?n *//文件访问(定位,写) .(TQ5/
~ package NetFox; uW\@x4 import java.io.*; GoGohsj <M5{.`o 7/5NaUmPTt public class FileAccessI implements Serializable{ 0~PXa(!^K I?^Q084 //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 3D 4]yR5 RandomAccessFile oSavedFile; ~#HH;q_7m long nPos; M~d+HE a2(D!_dZR =UI,+P: public FileAccessI() throws IOException .(P@Bl]XJ { Fy4< this("",0); c<JM1 } KZp,=[t XwKZv0ub -z>Z0viA public FileAccessI(String sName,long nPos) throws IOException _rWM] { c5T~0 'n oSavedFile = new RandomAccessFile(sName,"rw"); i5L+8kx4 this.nPos = nPos; ,T,B0 oSavedFile.seek(nPos); K4h-4Qbn } !4qps$p{ p[af[! :>AW@SoTp public synchronized int write(byte[] b,int nStart,int nLen) 1`2);b{@ { Tb!B!m int n = -1; rA1zyZlz try{ ^5FJ}MMJf oSavedFile.write(b,nStart,nLen); ,Do$`yO+ n = nLen; 2m)kyQ } 6\)8mK catch(IOException e) o1p$9PL\: { TNX%_Q< e.printStackTrace (); Hm.&f2|( } IDiUn!6Q 4acP*LkkQ 9 "
}^SI8 return n; Z,N7nMJf } <manv8*6 8a":[Q[ f2R+5`$ } -Z/6;2Q (:j+[3Ht +_-)0[+p /* BW;=i. **SiteInfoBean.java m"?'hR2 */ \U<F\i package NetFox; k
Nf!j ^t^<KL; YN5OuKMUd' public class SiteInfoBean { R5'Z4.~ v4,syd*3|V kw}ISXz v private String sSiteURL; //Site's URL i$fjr[$B private String sFilePath; //Saved File's Path 1S)0
23N private String sFileName; //Saved File's Name Fb\2df{@ private int nSplitter; //Count of Splited Downloading File sa0^1$(< n{qw ]/ 9>.<+b(>!' public SiteInfoBean() ,,C~j`F {//nSplitter的缺省值为5
ycAi(K //default value of nSplitter is 5 KOAz-h@6 this("","","",5); XCqfAcNQ } =xlYQ}-(a gR_b~^ hNR>Hy\ public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) yoA*\V { -;/@;W sSiteURL= sURL; A
Eyr_!G, sFilePath = sPath; ]~ g|SqPA@ sFileName = sName; =aCIaL&9Y this.nSplitter = nSpiltter; 00.iMmJ u%gm+NneK ?:;hTY } O+8ApicjTc 8^f[-^% 43orR !.Z public String getSSiteURL() (Aov}I+ { ;t@ 3Go return sSiteURL; Vp{RX8?. } {7M4SC@p| |+4E
8;4_ 31o7R &v public void setSSiteURL(String value) [}xIg8 { GD6'R"tJ sSiteURL = value; <g|nmu)o$ } 9 (FcA5Y ]a%\Q2[c te)g',#lT public String getSFilePath() ~i_R%z:y { B"E (Y M return sFilePath; JY050FL } Velbq s$nfY.C pg}DC0a public void setSFilePath(String value) o y%g{,V { n.H`1@ sFilePath = value; Kjca>/id } in;+d~? `v/tf|v6 eQ)ioY public String getSFileName() [9W&1zY { "*>QxA%c4 return sFileName; GF.g'wYc)Y } ;xkf?| YWBP'Mo fY+ .#V public void setSFileName(String value) px(1Ppb9 { |#khwH sFileName = value; )mo|.L0 } $GfxMt [#@p{[ ?r a~N)qYL: public int getNSplitter() }"; hz*a { DrCfC[A~] return nSplitter; nrD=[kc!w } $,@ rKRY CPCB!8-5 ^&w'`-ra public void setNSplitter(int nCount) ;uo|4?E:\( { $}h_EI6hS nSplitter = nCount; qpEC!~y } MvjwP?J] } +P6 m5Laq'~0_ XuAc3~HAd /* Yr(f iI **Utility.java +WEO]q?K */ ?Kz`
O>"6 package NetFox; ah@GSu;7 U>M>FZ -3XnK5 public class Utility { nh.v?| c$Nl-?W "@'9+$i6 public Utility() ; >hPHx { >a]
s MS^hsUj} F9G$$%Q-Z } [~r$US nv|y@!( //线程睡眠 <h>fip3o public static void sleep(int nSecond) "kuBjj2 { *q9$SDm try{
kd2'-9 Thread.sleep(nSecond); @P*P8v8: } ).#D:eO[~ catch(Exception e) %;XuA*e { $,@+Ua
e.printStackTrace (); =|t1eSzc } JU`'?b } XXdMp poR I
Y-5/ //日志 :95_W/l public static void log(String sMsg) -8J@r2 \ { mp$II?hZ* System.err.println(sMsg); Rn^N+3o'M } MhB=+S[@ ?=o]Wx0(9 HOI`F3#XI public static void log(int sMsg) sN/Xofh { kR|DzB7 System.err.println(sMsg); 2F)OyE } .\\#~r`t 3 } /]58:euR G!lykk] /u1zRw /* GnHf9
JrR **TestMethod.java Z"&ODVP */ wx7>0[ zE package NetFox; KD<`-b)7< JZ0+VB-3U !Dn1pjxc public class TestMethod { |&*rSp2iH _5 -"< e/~<\ public TestMethod() wA+4:CF@ { ///xx/weblogic60b2_win.exe VFp)`+8 try{ RR {9 SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); 2MrR|hLx //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); 3JO:n6 SiteFileFetch fileFetch = new SiteFileFetch(bean); UE](`|4H fileFetch.start(); E )SOcM) } d`*vJ#$>2 catch(Exception e){e.printStackTrace ();} %ieAY-<" Z.f<6<gF J\},o|WI } F#9KMu<<cI l@9:VhU( h.%Qn vL public static void main(String[] args) W|
eG}` { Hd}t=6 new TestMethod(); ^8t*WphZC } M4]|(A } 1Ee>pbd 点击下载更多相关资料
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