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/* S +73 /Vs **SiteFileFetch.java z;YX2G/{ */ 2j>C4Ck package NetFox; zS?}3#g0u import java.io.*; |~D~#Nz import java.net.*; ]%Whtj.,x7 VJgf,
5 (N 6NFLk+kqN public class SiteFileFetch extends Thread { 2I4G=jM[ =o"sBVj %HZ!s
`w_ SiteInfoBean siteInfoBean = null; //文件信息Bean X~; *zYd5 long[] nStartPos; //开始位置 {2|sk9?W long[] nEndPos; //结束位置 5=MM^$QG FileSplitterFetch[] fileSplitterFetch; //子线程对象 /KJWo0zo long nFileLength; //文件长度 Tc;BE boolean bFirst = true; //是否第一次取文件 9fSX=PVRmQ boolean bStop = false; //停止标志 uTrGb:^ File tmpFile; //文件下载的临时信息 Tkf4`Gxd DataOutputStream output; //输出到文件的输出流 %%O_:@9x, Z q}Cl'f //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) ?0E-Lac= public SiteFileFetch(SiteInfoBean bean) throws IOException #>$w9}gFi { =U~\iJ siteInfoBean = bean; vs.}Bou] //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); LrV4^{9( tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); qp1rP# if(tmpFile.exists ()) LTD; { <8Q?kj bFirst = false; !%C&hH\ read_nPos(); *UG=dl#F# } P}p6{ else O
>&,h^ { WgV[,( nStartPos = new long[bean.getNSplitter()]; +7)/SQM5 nEndPos = new long[bean.getNSplitter()]; w\.z-6G } <J1$s_^` !3at(+4 Lr(wS { b(g?X
(& } BtWm ZaKi j\@|oW0 hRN>]e,! public void run() f['pHR%l2$ { L@5g#mSl //获得文件长度 K*
0]*am|v //分割文件 m4T`Tg#P //实例FileSplitterFetch nr9cG/" //启动FileSplitterFetch线程 k{$Mlt?&- //等待子线程返回 w~9=6|_ try{ {I_I$x_ if(bFirst) m`ab5<%Gn { (V~PYf% nFileLength = getFileSize(); |a Ht6F if(nFileLength == -1) Wr;?t! { p>]2o\[" System.err.println("File Length is not known!"); 9ev"BO } d `+cNKf else if(nFileLength == -2) MU&P+Wr { F_Mi/pB^`9 System.err.println("File is not access!"); $y*["~TJ } 5/{gY{ else %g&i.2v { -@_V|C'? for(int i=0;i<nStartPos.length;i++) S)\%.~ n { #
OQ(oyT nStartPos = (long)(i*(nFileLength/nStartPos.length)); #6<9FY# } 9Lxj
]W2^ for(int i=0;i<nEndPos.length-1;i++) q^w3n2 { NCysYmt nEndPos = nStartPos[i+1]; KEj-y+ } (PCv4:`g nEndPos[nEndPos.length-1] = nFileLength; [HhdeLOX } U~8 oE_+ } Z66@@?` S}*%l)vfR (Sg52zv //启动子线程 ^E8eW fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; FPPGf!Eq for(int i=0;i<nStartPos.length;i++) nMHs5'_y { FLekyJmw~ fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), ztS'Dp}q< siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), O8:,XTAN nStartPos,nEndPos,i); 6,|)%~VUm Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); A5ps|zidI fileSplitterFetch.start(); &Qdd\h# } xem:#>&r // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), bP 2IX siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); U= PG0 // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", >m{)shBX nEndPos = " + nFileLength); 9f4#b8 // fileSplitterFetch[nPos.length-1].start(); ~?{"H< WNPdy m "8"7AoE //等待子线程结束 pJ#R :#P //int count = 0; obE_`u l# //是否结束while循环 93d ht boolean breakWhile = false; B6b {hsO [sY>ac AT U
2\Y while(!bStop) vx_v/pD { >p 7e6% write_nPos(); K G~fDb Utility.sleep(500); {
O*maE" breakWhile = true; `_'I 9,.a vF K&.J { LJRdV for(int i=0;i<nStartPos.length;i++) ZIx,?E+eJ { l~M86 h if(!fileSplitterFetch.bDownOver) vxo iPqo { /*lSpsBn breakWhile = false; h^5'i}@u break; Ui46p } toEmIa~o6 } 'qhA4W9 if(breakWhile) }cE,&n break; k]"Rg2>% <5~} !N X` Ee##:I[z //count++; b&!7(Q[ sT //if(count>4) Au,}5=+`P // siteStop(); %fpcH } S0~F$mP' $vdGkz@6 @"H+QVJ@ System.err.println("文件下载结束!"); !58-3F%P } -<i&`*zG catch(Exception e){e.printStackTrace ();} $N=A, S } l
49)Cv/ m4*Rr D;|4ZjM- //获得文件长度 CBTa9|57 public long getFileSize() J+LFzl07q { ^6ZA2-f/<8 int nFileLength = -1; v>$GVCY try{ n5%rsNxg URL url = new URL(siteInfoBean.getSSiteURL()); eGblQGRS HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); SN'LUwaMp! httpConnection.setRequestProperty("User-Agent","NetFox"); =1%3".
"n@ l\*} J%;TK6 int responseCode=httpConnection.getResponseCode(); R)#D{/#FW if(responseCode>=400) ewk62{ { H>`?S{J processErrorCode(responseCode); }{S W~yW return -2; //-2 represent access is error c`y[V6q9 } 2ZB'WzH.X N@^?J@#V Z|
+/Wl-h String sHeader; ]RQQg,|D A[ ZJS #T n~hnW for(int i=1;;i++) ^c^9kK' { VzMoWD; //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); t}`|\*a //Utility.log(in.readLine()); 'UT 4x9&z sHeader=httpConnection.getHeaderFieldKey(i); !o&Mw:d if(sHeader!=null) `yHV10 { ~^IS{1 if(sHeader.equals("Content-Length")) /z,sM"d { !w98[BE7 nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); +tOBt("5/ break; >GgX-SZ% } r 06}@ 7 } )D@1V=9, else BJk\p.BVN break; 6A/Nlk. } NwuME/C7# } $d!Sl
a catch(IOException e){e.printStackTrace ();} ~c`@uGw catch(Exception e){e.printStackTrace ();} ![:S~x1 6,0pkx&Nv ."PR Z, Utility.log(nFileLength); yc4mWB~gyU ~|pVz/s|G v)+wr[Qs return nFileLength; z(3mhMJY } f
7et 7^Jszd:c08 }jfU qqFd //保存下载信息(文件指针位置) MlsF?"H p private void write_nPos() 'sY>(D*CQ { ^,b*.6t try{ 7vcYI#(2
Y output = new DataOutputStream(new FileOutputStream(tmpFile)); JHc|.2Oe output.writeInt(nStartPos.length); @
MNL for(int i=0;i<nStartPos.length;i++) )-[ 2vhXz { g^^%4Y // output.writeLong(nPos); fh
)QX output.writeLong(fileSplitterFetch.nStartPos); IJo`O output.writeLong(fileSplitterFetch.nEndPos); )"jG)c^1* } }vxb, [# output.close(); _ts0@Z_: } netKt_ catch(IOException e){e.printStackTrace ();} _$wWKJy9 catch(Exception e){e.printStackTrace ();} i?'HVx } &m4
\"X@ M,t8<y4W/ 23y7l=.b/ //读取保存的下载信息(文件指针位置) djPr 4Nog private void read_nPos() sxO_K^eD { r NqJL_! try{ WMZa6cH DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); =q^o6{d0" int nCount = input.readInt(); W2yNEiH nStartPos = new long[nCount]; %7O`]ik: nEndPos = new long[nCount]; LlRvm/ for(int i=0;i<nStartPos.length;i++) jY:(Tv3~ { ~DPg):cZ nStartPos = input.readLong(); {j,bV6X nEndPos = input.readLong(); q uv`~qn } bI@+Or input.close(); ~VUNN[ } PFG):i-? catch(IOException e){e.printStackTrace ();} Z,,Da|edH catch(Exception e){e.printStackTrace ();} o]MQ)\r } }%y_LcL phbdV8$L t_3)} private void processErrorCode(int nErrorCode) 8S@ ~^D { @+Berb System.err.println("Error Code : " + nErrorCode); EFf<|v } mh.0%
9`9 gUL`)t\} * gO4J[_ //停止文件下载 X+P&
up06 public void siteStop() T!pWU*aB { A]BG* bStop = true; . ~G>vVb for(int i=0;i<nStartPos.length;i++) Zj~tUCc fileSplitterFetch.splitterStop(); T
{(6*^g<B w^p
'D{{ 0d`s(b54;O } B HoZ}1_ } %9-).k //负责部分文件的抓取 QCa$<~c **FileSplitterFetch.java >efYpd#^ */ g*-
K!X6l package NetFox; i <bFF03*S =:6Y<ftC &]pW## import java.io.*; TxN#3m?G import java.net.*; @XDU!<N ;TMH.E,h: R7x4v public class FileSplitterFetch extends Thread { `8xe2=Ub 2y
~]Uo eAu3,qoM String sURL; //File URL #R305 long nStartPos; //File Snippet Start Position 3r+vp yu long nEndPos; //File Snippet End Position *FK!^Y int nThreadID; //Thread's ID Z?XE~6aP> boolean bDownOver = false; //Downing is over iIcO_ZyA boolean bStop = false; //Stop identical "]kaaF$U% FileAccessI fileAccessI = null; //File Access interface
Cg}cD. /Kwo^Q{ &UbNp8h public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException exTpy { eO(VSjo'` this.sURL = sURL; 1U@qRU this.nStartPos = nStart; + To{Tm- this.nEndPos = nEnd; #2_phm' nThreadID = id; cpgHF`nt fileAccessI = new FileAccessI(sName,nStartPos);//定位 Q++lgVh)E } {G%`K,T K$#(\-M
-g;iMqh# public void run() RQ9fA1YP { JT[|l-\zo while(nStartPos < nEndPos && !bStop) '<>pz<c { i?qS8h{ 9d#-;qV Gow_a' try{ *vCJTz URL url = new URL(sURL); s7(mNpo HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); R\A5f\L9 httpConnection.setRequestProperty("User-Agent","NetFox"); _D$|lk- String sProperty = "bytes="+nStartPos+"-"; Ga.a"\F.V httpConnection.setRequestProperty("RANGE",sProperty); }4#%0x`w Utility.log(sProperty); +7^%fX;3pW =MB[v/M59w #&1mc_`/ InputStream input = httpConnection.getInputStream(); ,D+pGxbr
//logResponseHead(httpConnection); g>/,},jv[x /XS}<!)% P3on4c byte[] b = new byte[1024]; Rl.3p<sX int nRead; SEIGs_^'\ while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) Q;)[~p { 'F5&f9A nStartPos += fileAccessI.write(b,0,nRead); 8nt:peJ$+ //if(nThreadID == 1) #)GL%{Oa // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); -+Kx^V#'R } +sQ=Uw#e "sUL"i w%S\)wjS Utility.log("Thread " + nThreadID + " is over!"); [,8@oM# bDownOver = true; a7%5Qg9B; //nPos = fileAccessI.write (b,0,nRead); nP0|nPWz# } O<Ht-TN& catch(Exception e){e.printStackTrace ();} ou6yi;
l% } @4sv(HyDY } (05/}PhB` 2%. A{! pu0IhDMn //打印回应的头信息 3-lJ] 7OT public void logResponseHead(HttpURLConnection con) S'9T>&<Kn { i`FevAx;[m for(int i=1;;i++) iNe;h| { ^0pd- n@pn String header=con.getHeaderFieldKey(i); VI74{='= if(header!=null) :JV=Kt //responseHeaders.put(header,httpConnection.getHeaderField(header)); Owo2DsT t Utility.log(header+" : "+con.getHeaderField(header)); t*NZ@)> else w;&J._J break; c/^}
=t( } W[AX? } 8jMw7ti %qV=PC 4sP0oe[h public void splitterStop() PL@hsZty~c { vCb3Ra~L` bStop = true; )%- FnW } ]p\7s )U`6` &F plh.-" } I
^?TabL Q0#oR[( Rf^$?D&^ /* (Dlh;Ic
r9 **FileAccess.java po4seW! *//文件访问(定位,写) Yev] Lp package NetFox; ~4"adOv import java.io.*; P%8
Gaa= sG=D(n1 -Ds}kdxw public class FileAccessI implements Serializable{ ['~3"lK^O =kp#v //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 B:\\aOEj RandomAccessFile oSavedFile; Pv17wUB long nPos; ~pO6C*" Aq yR+ IlVz 5#R public FileAccessI() throws IOException e=<knKc
Q { GPONCL8(0 this("",0); %YkJA: } {pH{SRM)B /x c<& 0M7Or)qN public FileAccessI(String sName,long nPos) throws IOException $5yH(Z[[ { ",!#7h oSavedFile = new RandomAccessFile(sName,"rw"); H!?Av$h` this.nPos = nPos; x4r8^,K3Zn oSavedFile.seek(nPos); ;PCnEs } !_ZknZTT 4zkn~oy _PLY<i2vr public synchronized int write(byte[] b,int nStart,int nLen) ea kj>7\s { )r3}9J int n = -1; :hJHjh try{ n+QUT oSavedFile.write(b,nStart,nLen); Ebw1 %W KC n = nLen; ROlef;/A } G0oY`WXOB catch(IOException e) K1>X%f^ { 5\gL+qM0 e.printStackTrace (); GqMa|8j } c7UmR?m -^LUa]"E ?oana% return n; gqV66xmJ3 } *oopdGue B>Tfyo UF0W%Z } ,n<t':- ZKy)F-yX s~
||Vv! /* nr7#}pzo **SiteInfoBean.java Yv<'QC */ Q&+Jeji package NetFox; F*m^AFjs QK% Nt 5$f
vI#NO< public class SiteInfoBean { 8,B?!%FP %IrR+f+H eRU0gvgLu" private String sSiteURL; //Site's URL zx` %)r private String sFilePath; //Saved File's Path 4wYD-MB private String sFileName; //Saved File's Name l r80RL'_ private int nSplitter; //Count of Splited Downloading File .1n=&d| 701a%Jq_2 8X Jg public SiteInfoBean() ).U\,@[A{ {//nSplitter的缺省值为5 ^j]"!:h //default value of nSplitter is 5 Geyy!sr`` this("","","",5); g_X-.3=2K } gZA[Sq _gU:!:} sZe$?k| public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) s?Lx\?T { s%M# sSiteURL= sURL; X$*MxMNs sFilePath = sPath; Y-2IAJHS8 sFileName = sName; {1?94rz this.nSplitter = nSpiltter; -55[3=# Lx%*IE|c #1Zqq([@ } gu?e%]X3 R[_Q}W'HG (~>uFH public String getSSiteURL() =MR.*m{ { MoAie|MKe return sSiteURL; jr/ } #(@!:f1 G47(LE"2b !8g419Yg public void setSSiteURL(String value) hcn$uyP { ?^Gi;d5 sSiteURL = value; ,+w9_Gy2H } -e_91WI *Bfo"["0. \c')9g@ public String getSFilePath() `iHyGfm { 8^IV`P~2M return sFilePath; u<L<o2 } Sg%h}]~ wnioIpRkh KA
$jG{yq public void setSFilePath(String value) rX7GVg@H { _V2^0CZ sFilePath = value; Eep~3U } yq H FOPfob[ LN z public String getSFileName() VSx9aVPkC { 5!QT
}Um return sFileName; yv[3&E? } ]& 8c
45c ~];r{IU 'FNnFm public void setSFileName(String value) $-D}y: { Yg/g9$' sFileName = value; (rmOv\hG9V } }Q2v~eD 7xF)\um DCsamOA~ public int getNSplitter() *S xDwN { awXK9}. return nSplitter; +3yG8 } L@5sY0 M gmUXh;aHc A%[e<vj9 public void setNSplitter(int nCount) reQr=OAez { -F. c<@*E nSplitter = nCount; 8Y]% S9. } qX[{_$^Q } Y/x>wNW zG0]!A nND;
lVQSO /* Z~0TO-Q **Utility.java `uKsFXM */ mEm=SpO[$o package NetFox; t[e]AU[} $u~*V
ZZ>"LH public class Utility { `@q\R-` h;+{0a y
Nc@K| public Utility() r>e1IG { t$Bu<frQ lfAiW;giJ S$O5jX 0 } tj ?%{L ^w!1QH0:/ //线程睡眠 _/czH<
public static void sleep(int nSecond) Y{Ff I+ { 9u6VN]divB try{ f, '*f:( Thread.sleep(nSecond); 5tI#UBha } "{S6iH)]8 catch(Exception e) \#h{bnx { s
TVX/Q e.printStackTrace (); ew \WV" } qeW.~B!B } csd9[=HW/Q eZoAy[ //日志 fikDpR public static void log(String sMsg) 4]HW!J { .L9g*q/} System.err.println(sMsg); HUAbq } } 3(Ns1/;?, )oALB vX =]r2;014
public static void log(int sMsg) .=)[S5.BVq { o}&{Y2!x System.err.println(sMsg); m-qu<4A/U| } d8uDSy } ]K3bDU~ 2,Aw6h; m-6&-G# /* ~ulcLvm:i **TestMethod.java Q:j~
kutS| */ i&1rf | package NetFox; C B`7KK [8<0Q_?, Qgf\"s public class TestMethod { '6kD6o_p1 Rt5,/Q0 i)] f0F public TestMethod() P(s:+ { ///xx/weblogic60b2_win.exe [dR#!"6t try{ id588Y78 SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); >=d 5Scix //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); !PA ><F SiteFileFetch fileFetch = new SiteFileFetch(bean); K_AdMXF9 fileFetch.start(); UlWm).
b;v } o[1#)& catch(Exception e){e.printStackTrace ();} `M*jrkM]x op@=0d?? g${JdxR: } bSz@@s. V%{WH} ek. @ 0c public static void main(String[] args) rq^%)tR { obGhO new TestMethod(); kdWUz( } <$@I*xk[ } ,N_/J4Us 点击下载更多相关资料
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