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/* i][7S mN **SiteFileFetch.java xw-x<7 */ ]saf<?fzr package NetFox; mLM$dk3 import java.io.*; 7*5$=z4,1 import java.net.*; -d\O{{%>.z 620y[iiK$ />fy@nPl| public class SiteFileFetch extends Thread { 4ew|5Zex.~ T*>n
a8W W(9fCDO; SiteInfoBean siteInfoBean = null; //文件信息Bean ToIvyeFr long[] nStartPos; //开始位置 a
pqzf long[] nEndPos; //结束位置 $3](6 FileSplitterFetch[] fileSplitterFetch; //子线程对象 }fw;{&s{z long nFileLength; //文件长度 GW$(E*4q boolean bFirst = true; //是否第一次取文件 v%3mhk# boolean bStop = false; //停止标志 89KX.d File tmpFile; //文件下载的临时信息 P[PBoRd2 DataOutputStream output; //输出到文件的输出流 >`DbT:/< ]X+3" //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) [X:mmM0gd public SiteFileFetch(SiteInfoBean bean) throws IOException 'pOtd7Vr { R}4o{l6 siteInfoBean = bean; pYV$sDlD //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); q4vu r>m6 tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); 10dVV[= if(tmpFile.exists ()) +F ~;Q$T { .:,RoK1 bFirst = false; lpkg(J#& read_nPos(); 0j%@P[zQ } ZjLzS]\a else sqHvrI { e47JLW&b nStartPos = new long[bean.getNSplitter()]; le`&VdE^ nEndPos = new long[bean.getNSplitter()]; ((rk)Q+;v } /=4P<&J +v%V1lf^~ l|-1H76 ?}%Gr,tj2 } DG1
>T Xg.'<.!g0 /E(H`;DG public void run() 2XrPgq' { "Iu[)O% //获得文件长度 $DC*&hqpt //分割文件 B M{GSX //实例FileSplitterFetch ")7,ZN; //启动FileSplitterFetch线程 L f[>U //等待子线程返回 sChMIbq!Av try{ l(9$s4R if(bFirst) cH6ie?KvAo { f&t]O$ nFileLength = getFileSize(); ,-A8;DW]^J if(nFileLength == -1) phSF.WC { !mK[kXo System.err.println("File Length is not known!"); {s|rk } 35Nwx< else if(nFileLength == -2) (+>~6SE { OxX{[|!` System.err.println("File is not access!"); rKq/=Avv } ?_ [xpK() else UiS9uGj { 8WV1OIL for(int i=0;i<nStartPos.length;i++) Rk^Fasg" { =nOV!!
nStartPos = (long)(i*(nFileLength/nStartPos.length)); :7p0JGd } m}0US;c#f for(int i=0;i<nEndPos.length-1;i++) qie7iE`o { YE&"IH]lF nEndPos = nStartPos[i+1]; La?q> } c;e-[F 7 nEndPos[nEndPos.length-1] = nFileLength; Ld? tVi } )F&@ M;2p' } =If % m9 C1P{4 U 7P9n.
[ //启动子线程 Vn? %w~0! fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; I"@X~Y7} for(int i=0;i<nStartPos.length;i++)
y|q4d(P. { d9|dHJf fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), #/@U|g siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), ([UuO}m- nStartPos,nEndPos,i); AL! ^1hCF Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); c&)H fileSplitterFetch.start(); Jl&bWp^3 } j11 \t // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), ,Ihuo5>/z siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); [6BLC{2 // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", /7*jH2 nEndPos = " + nFileLength); lO8.Q"mxo // fileSplitterFetch[nPos.length-1].start(); F1R91V| 5/DTE:M< k);z}`7 //等待子线程结束 8,YF>O& //int count = 0; wq_c^Ioy //是否结束while循环 &T]+g8 '' boolean breakWhile = false; b>E%&sf VP\HPSp rB?u.jn0T while(!bStop) E!Hq%L!/ { xq=+M!V write_nPos(); F/ 2@%,2n Utility.sleep(500); hSaS2RLF breakWhile = true; 9:A>a3KOH 1O45M/5\o I!jSAc{ for(int i=0;i<nStartPos.length;i++) M! gX4 { mc|T}B if(!fileSplitterFetch.bDownOver) "$+naY{w { '0X!_w6W breakWhile = false; Q l%7wrK break; F^_d8=67h } /V~L:0% } mLk@&WxG if(breakWhile) H#k"[eZ break; 9 f-T>} swG^L$r` xj{X#[q): //count++; J[YA1 //if(count>4) v6oPAqj,r // siteStop(); riZFcVsB } G6JyAC9j Q'JE DH\ /}2
bsiJT System.err.println("文件下载结束!"); 0NfO|l7P } )]J I Q"rR catch(Exception e){e.printStackTrace ();} 5h1!E } C-qsyJgZy >tr?5iKxc "+_]N9%) //获得文件长度 2F!K
}aw public long getFileSize() cAyR)Y!I { uByF*}d1 int nFileLength = -1; vIU+ZdBw try{ r {)d?Ho= URL url = new URL(siteInfoBean.getSSiteURL()); p$f#W HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); (J.(Fl>^ httpConnection.setRequestProperty("User-Agent","NetFox"); #lltXqvD? ;VK;_d Z/q%%(fh 0 int responseCode=httpConnection.getResponseCode(); >1pD'UZIy7 if(responseCode>=400) ?*}76u { MP[v 9m@ processErrorCode(responseCode); \*LMc69
return -2; //-2 represent access is error n8[sR;r5f } x@DXW( sl6p/\_w {,IWjt &> String sHeader; ?MKf=!w P)1@HDN== \q3H#1A for(int i=1;;i++)
tyP-J4J { f*XF"@ZQV //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); z$7YC49^ //Utility.log(in.readLine()); +Jt"JJ>% k sHeader=httpConnection.getHeaderFieldKey(i); Cb=r 8C if(sHeader!=null) Ep 5lmzg { k%hD<_:p if(sHeader.equals("Content-Length")) C$*`c6R { OOl{ nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); wrqdQ}@( break; m6 hA,li } W:(:hT6`j9 } ivoPl~)J else 82$By]Y9 break; <$?:| } x ?^c:`. } rA`zuYo catch(IOException e){e.printStackTrace ();} M|n)LyL catch(Exception e){e.printStackTrace ();} |]GEJUWtCd /4_}wi\ Jk{>*jYk` Utility.log(nFileLength); ,<EmuEw | Lj~lfO 7e8hnTzl8< return nFileLength; IE_@:]K}Ja } '/sc `(`:0 m9L+|r H~ks"D1 //保存下载信息(文件指针位置) M<ad>M private void write_nPos() Ku&(+e { ,1~Zqprn try{ //J:p,AF output = new DataOutputStream(new FileOutputStream(tmpFile)); ]G1j\ wnF output.writeInt(nStartPos.length); t<`ar@} for(int i=0;i<nStartPos.length;i++) HhqqJEp0 { DVB:8"Bu // output.writeLong(nPos); (S2<6Nm8 output.writeLong(fileSplitterFetch.nStartPos); $hKgTf? output.writeLong(fileSplitterFetch.nEndPos); \&TTe8 } E32z(:7M output.close(); `/ HygC6 } 3_h%g$04s catch(IOException e){e.printStackTrace ();} PA,j;{,(b catch(Exception e){e.printStackTrace ();} qWanr7n]@ } ?5(L.XFm 9txZ6/
Ys<wWfW //读取保存的下载信息(文件指针位置) QlXy9-oJ" private void read_nPos() Rp@u.C< { htF&VeIte try{ (vI7qD_ DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); Ce0I8B2y int nCount = input.readInt(); I*
bjE' nStartPos = new long[nCount]; 61mQJHl. nEndPos = new long[nCount]; }K*ri for(int i=0;i<nStartPos.length;i++) PH7L#H^ { gIRCJ=e[b nStartPos = input.readLong(); Q1jyetk~I nEndPos = input.readLong(); s]I],>}RU } 3R{-\ZMd input.close(); ;zCHEz } TuF:m"4 catch(IOException e){e.printStackTrace ();} B"qG-ci catch(Exception e){e.printStackTrace ();} JfVayI= } <;XJ::d ]!A;-m K[ \z'9Q private void processErrorCode(int nErrorCode) hV,3xrm?P { *jJ62-o System.err.println("Error Code : " + nErrorCode); VLO>{"{' } :?p{ga9 +]>a`~ bkM$ Qo //停止文件下载 z N
t7DK public void siteStop() /tUl(Fp J` { 4/h2_
bStop = true; Gt1Up~\s for(int i=0;i<nStartPos.length;i++) t]` 2f3UO fileSplitterFetch.splitterStop(); q@\_q! sbs"26IE xv*mK1e } gRFC n6Q } iM956 3v //负责部分文件的抓取 V\G>e{ **FileSplitterFetch.java A]J^{h0k */ >u4e:/5] package NetFox; =3T?U_u@ \
bhok Q0--.Q=:Y import java.io.*; ~FsUK;? import java.net.*; k N^)6 B.WJ6.DkS y H'\<bT public class FileSplitterFetch extends Thread { ~"wD4Ue nY8UJy}<oL J~}UG]j n String sURL; //File URL )s8r(.W long nStartPos; //File Snippet Start Position
F#PJ+W*h long nEndPos; //File Snippet End Position ,qfa,O int nThreadID; //Thread's ID 7*5ctc!dG boolean bDownOver = false; //Downing is over ]lo1Kw boolean bStop = false; //Stop identical |H A7 C FileAccessI fileAccessI = null; //File Access interface KF'M4P Qnw$=L: J)G3Kq5>:b public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException U\
L"\N 7 { HUghl2L.< this.sURL = sURL; l<HRD this.nStartPos = nStart; %b?Pasf. this.nEndPos = nEnd; &-*nr/xT nThreadID = id; Z`*cI fileAccessI = new FileAccessI(sName,nStartPos);//定位 $"i690 } <oO,CXF G<z)Ydh_ @Dy.HQ~ public void run() 6Te}"t> { m7"f6zSo( while(nStartPos < nEndPos && !bStop) yRznP) {
>ob/@ cDx^}N! Wk|z\OR( try{ w=`z!x![/ URL url = new URL(sURL); O)Qz$ HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); @(
t:E`8 httpConnection.setRequestProperty("User-Agent","NetFox"); z(WpOD String sProperty = "bytes="+nStartPos+"-"; e?YbG.(E9 httpConnection.setRequestProperty("RANGE",sProperty); "uCQm ' Utility.log(sProperty); lkm(3y@']A c|R/,/ jQb D2x6( InputStream input = httpConnection.getInputStream(); 9PJDT] //logResponseHead(httpConnection); 1FJ[_l Kzb@JBIF 6ZR0_v;TD byte[] b = new byte[1024]; *I67SBt int nRead; Ig<p(G.;} while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) E8i:ER $$7 { NM@An2 nStartPos += fileAccessI.write(b,0,nRead); )
b10%n^ //if(nThreadID == 1) [*G2wP[$ // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); Fjzk;o } @>]3xHE6#= @"!SU'* q(7D8xG;F Utility.log("Thread " + nThreadID + " is over!"); 5avO48;Vc bDownOver = true;
u\xm8}A //nPos = fileAccessI.write (b,0,nRead); @9h#o5y q } !`_f\ catch(Exception e){e.printStackTrace ();} =dBrmMh } HWhKX:`l } a,~P_B|@ m'tk#C 50&F#v%YB //打印回应的头信息 9ojhI=: public void logResponseHead(HttpURLConnection con) gcxk'd { f>dkT'4 for(int i=1;;i++) ,7P^]V1 { !P$xh String header=con.getHeaderFieldKey(i); \2pFFVT
if(header!=null)
A232"p_ //responseHeaders.put(header,httpConnection.getHeaderField(header)); Y2-bU 7mo Utility.log(header+" : "+con.getHeaderField(header)); >n~p1: $ else H Im,
"iYk break; S=p u } 7Ca\ (82 } MuGg
z>CV[ 3.X0!M;x qJU)d public void splitterStop() YSo7~^1W" { # &83;uys bStop = true; sK0VT"7K } F5+_p@!i g i'agB^ V^I/nuy } v4_OUA>z, h)8+4?-4I (Fzh1# /* lzG;F] **FileAccess.java `HG19_Z *//文件访问(定位,写) 4QAIQQS package NetFox; ]Cn*C{ import java.io.*; [IFRwQ^%_O ;Ia1L{472m |HGb.^f? public class FileAccessI implements Serializable{ * g4Cy8$ ""3m!qn# //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 ~88 Tz+
RandomAccessFile oSavedFile; %8CT -mQ long nPos; ,'CWt]OS' 7&V^BW |.O!zRm public FileAccessI() throws IOException h5rP]dbhXU { R.IUBw5;/ this("",0); J xm9@, } 07Q[L'}y@ FJ~_0E#L :$i:8lz
public FileAccessI(String sName,long nPos) throws IOException MW$H/:3 { @:+n6 oSavedFile = new RandomAccessFile(sName,"rw"); U?fN3 this.nPos = nPos; H
r^15 oSavedFile.seek(nPos); )_*a7N! } |sqo+E H!r
Kz =+}}Sv2 public synchronized int write(byte[] b,int nStart,int nLen) I"32[?0
(; { ESxC{
" int n = -1; /~l/_Jct@G try{ ?ZHE8 oSavedFile.write(b,nStart,nLen); ?h )3S7 n = nLen; )^f9[5ee } %}MA5 t]o catch(IOException e) >Ug?O~- { w<~<(5mM5; e.printStackTrace (); }SMJD } cbCE
$ Fy@#r+PgWp Kwl qi]~ return n; @y0bU*v7 } E[3FdX8 Mj
B<\g> )n}]]^Sc } 4ZJT[zi U++~3e@l r` `iC5Ii /* AqbT{,3yW **SiteInfoBean.java c >
mu)('U */ frmqBC VJ: package NetFox; {8#N7(%z `+hy#1] Md>f public class SiteInfoBean { `}9 1S a|P~LMPM B2G5hbaA private String sSiteURL; //Site's URL Z0"& private String sFilePath; //Saved File's Path Naf`hE9 private String sFileName; //Saved File's Name !*?(Q6 private int nSplitter; //Count of Splited Downloading File O:,2OMB}B` a\&(Ua Ukx/jNyYv public SiteInfoBean() tC?Aso {//nSplitter的缺省值为5 85%Pq:E //default value of nSplitter is 5 u1;e*ty this("","","",5); X(!AI|6Bt } VX!Y`y^a ~*mOt7G ci,o8 [Y public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) (Gi+7GMV' { g\qL}: sSiteURL= sURL; zY+t ,2z sFilePath = sPath; | 3N.5{ sFileName = sName; sm2p$3v this.nSplitter = nSpiltter; xS~yH[k mI7rx`4H =nvAOvP{? } b#p~F}qT S:p.W=TAB !$p2z_n$@. public String getSSiteURL() uXQ7eXX { I|F~HUzA" return sSiteURL; /OhaERv } ]Z.<c$ m]0^ !bZhj3. public void setSSiteURL(String value) piYws<Q { vLnq%@x sSiteURL = value; O^X[9vrW } m~Y'$3w ' 1P=^ xm}q6>jRV public String getSFilePath() vbRrk($` { /$FXg;h9$ return sFilePath; 4-]Do? } 5vs`uUzr b`h%W"|2L ]]J#7L# public void setSFilePath(String value) h/ LR+XX! { iot.E%G sFilePath = value; RwAbIXG{0 } Yg=E@F
Z:_m}Ya| ]RH=s7L public String getSFileName() ><;l:RGK| { GOYn\N;V2 return sFileName; )Lc<;=w'9 } 85r)>aCMn f
MY; ).0V%}> public void setSFileName(String value) * ?
K4!q' { /S7+B] sFileName = value; 1<LC8?wt } %_B:EMPd , @%C8Z -H1"OJ2aF
public int getNSplitter() &YT_#M { ?ID* /u|X return nSplitter; N?qIpv/a. } hmK8jl<6 j+_S$T8w \6`v.B&v public void setNSplitter(int nCount) S2J#b"Y { CrnB{Z4L nSplitter = nCount; G$;>ueM } QD$}-D[ } X'V+^u@W hlAR[ ] TK;\_yN /* RGT_}ni **Utility.java 8w)e/*:j */ y#]}5gJ package NetFox; r?64!VS; Xtci0eS#V )^t!|*1LA public class Utility { Ms.PO{wb P['X<Xt8 IXGW2z; public Utility() [ 3$.* { tO?21?AD D 7*zB*"B'1t qTyg~]e9( } KK:N [x u$WBc\j //线程睡眠 7d3'CQQ4 public static void sleep(int nSecond) '"oo;`g7 { >?S\~Y try{ x Z|&/Ci Thread.sleep(nSecond); =y?#^ } WwW"fkv catch(Exception e) NNwc!x)* { (N,nux(0k e.printStackTrace (); )r ULT$;i@ } WI,40&< } .W!tveX8- uVN.= //日志 >HE,' public static void log(String sMsg) 4Z*|Dsw { riID,aut System.err.println(sMsg); hZ!oRWIU%G } N g58/}zO y&7YJx .j:i&j( public static void log(int sMsg) joe9.{ { 2*+3RrJ System.err.println(sMsg); JYPxd~T/- } 2bWUa~%B } -r!42`S !d\t:0; ^rL,&rk /* <# >Oy&E **TestMethod.java ?p(kh^ z */ =KV@&Y^x4 package NetFox; ?~!tM}X0:3 u0xQ;BQ -<6v:Z public class TestMethod { ]K7`-p~T x7f:F. !;i*\
a public TestMethod() 5!~!j
"q { ///xx/weblogic60b2_win.exe S0F@#mSQ? try{ fVYiwE=F SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); d5Qd' //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); ` "B^{o SiteFileFetch fileFetch = new SiteFileFetch(bean); Y =9j2 ]t fileFetch.start(); 4K E)g } UIn^_}jF` catch(Exception e){e.printStackTrace ();} ?gLAWz =qw&dwIQ S9J5(lYv~N } oB4#J* .vK.XFZ8R qh$X^%g public static void main(String[] args) *.8JP { _D-5}a" new TestMethod(); 3g;T?E } YX_vv!-] } A]j}' 点击下载更多相关资料
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