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/* G+5G,|} **SiteFileFetch.java nP0}vX)< */ w.0.||C
O package NetFox; L8Z?B\ import java.io.*; 2$3BluK import java.net.*; wmoOp;C <{cPa\ `SIJszqc
public class SiteFileFetch extends Thread { 8q0f#/`v &[3!Lk`.0 g%\e80~1 ( SiteInfoBean siteInfoBean = null; //文件信息Bean 8#oF7eE long[] nStartPos; //开始位置 89 SsS b long[] nEndPos; //结束位置 *|` ' L FileSplitterFetch[] fileSplitterFetch; //子线程对象 }1$8)zH long nFileLength; //文件长度 j*6!7u.,K boolean bFirst = true; //是否第一次取文件 )3u[btm boolean bStop = false; //停止标志 VK|!aqA{b File tmpFile; //文件下载的临时信息 ?X:RrZ:/ DataOutputStream output; //输出到文件的输出流 wOa_" 6XX5K@ //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) |\}f)Xp- public SiteFileFetch(SiteInfoBean bean) throws IOException Um9=<*p { 525xm"Bs siteInfoBean = bean; sH&8"5BT% //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); "=
%- tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); n_c0=YH if(tmpFile.exists ()) 50'6l
X(v, { 1hMk\ -3S bFirst = false; *tP,Ol read_nPos(); /
Sp+MB9 } r+Z+x{ else QeQbO { w]%r]PwU+ nStartPos = new long[bean.getNSplitter()]; Sa<R8X'J nEndPos = new long[bean.getNSplitter()]; vJcvyz#%1 } nl?|X2?C zd;xbH//)b RP(FV<ot oiR`\uY } s ^}V ^\wosB3E UcK!v*3E public void run() g6*}&.& { Dic(G[ //获得文件长度 xr?r3Y~^e //分割文件 bRIb'%=+GA //实例FileSplitterFetch i?|SC= //启动FileSplitterFetch线程 ?dTz?C.w //等待子线程返回 "5YsBih try{ */S,CV if(bFirst) MQ,2v.
vZ. { =lffr?#&B nFileLength = getFileSize(); 2s(K4~e e if(nFileLength == -1) {uhw ^)v { &0o&!P8CB System.err.println("File Length is not known!"); w!xSYh') } }y0UyOa{C else if(nFileLength == -2) *k=}g][? { nGuF,0j System.err.println("File is not access!"); ao,LP,_ } +6TKk~0e^ else XCt}>/"s\h { f^]2qoN for(int i=0;i<nStartPos.length;i++) >M +!i+ { T&{EqsI=B nStartPos = (long)(i*(nFileLength/nStartPos.length)); _=cMa's } Oi{jzP for(int i=0;i<nEndPos.length-1;i++) TRQva8d? { \C>I6{ nEndPos = nStartPos[i+1]; q=
tDMK'h } 5ax/jd~} nEndPos[nEndPos.length-1] = nFileLength; \dCdyl6V } !u=[/> } 5&VLq IYrO;GQ hio{: ( //启动子线程 6x.#K9@q4 fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; p2cKtk+ for(int i=0;i<nStartPos.length;i++) dpE+[O_ { b0
5h, fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), .E@yB`AR siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), {Ji[d.cY nStartPos,nEndPos,i); 2R)Y}*VX Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos);
vk$]$6l2 fileSplitterFetch.start(); 9BF#R<}h } KBOxr5w // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), qUVV374N siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); _jr%s // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", ;[*7UE+#7 nEndPos = " + nFileLength); g Ts5xDvJ // fileSplitterFetch[nPos.length-1].start(); M~^|dR)D O1-Ne.$ Gm_Cq2PD( //等待子线程结束 ;Cv x48 //int count = 0; m 'a3}vRV( //是否结束while循环 [P"#?7 N boolean breakWhile = false; (m@({ p6>3
p zm_mLk$4H while(!bStop) 0Y[mh@( { 4aiI&, write_nPos(); b%QcB[k[WB Utility.sleep(500); g)1`A24 breakWhile = true; yBRYEqS+ ._q}lWT 4;2 for(int i=0;i<nStartPos.length;i++) 6)veuA3] { b~*CJ8Ad if(!fileSplitterFetch.bDownOver) $x*(D|\'< { X7rsO^}W breakWhile = false; LP'wL6# break; ]1 jhy2j } mndKUI}d } ||))gI`3a if(breakWhile) |s,y/svp break; X4<Y5?&0 '!F'B:
nT%ko7~- //count++; Qb5@e#
//if(count>4) &I:ZJuQ4 // siteStop(); Ig<# {V } iwy;9x Oye6IT" 3lTnfc& System.err.println("文件下载结束!"); 4t-l@zFWb } hEFOT]P4 catch(Exception e){e.printStackTrace ();} @*E=O | } ME66BWg{ ,n2"N5{jw M.HMnN# //获得文件长度 <Uc public long getFileSize() yJ="dEn>i" { {:|b,ep
T int nFileLength = -1; "|Kag|(qB try{ }kF?9w URL url = new URL(siteInfoBean.getSSiteURL()); kE :{#>[Uz HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); 6Jq3l_ httpConnection.setRequestProperty("User-Agent","NetFox"); 3~{0X- 1IlOU|4 Omi/sKFMi int responseCode=httpConnection.getResponseCode(); X:lStO#5 if(responseCode>=400) 8rjD1< { d0i|^ processErrorCode(responseCode); 7%W1M@ return -2; //-2 represent access is error a`[9<AM1# } Uy.ihh$I- %P{3c~?DH S{3c}>n String sHeader; 7<Qmpcp = jSSEfy>^ #WJ*)$A@& for(int i=1;;i++) 8.>himL {
M%Ksyr9 //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); k]^ya?O]p //Utility.log(in.readLine()); 0m=57c$O sHeader=httpConnection.getHeaderFieldKey(i); r6R@"1/ if(sHeader!=null) L^zh|MEyzk { T--%UZD]W if(sHeader.equals("Content-Length")) CUHT5J*sY { nt+OaXe5D nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); m=+x9gL2 break; qGX#(,E9; } )0]U"Nf ho } Dx`-h# else 5@-H8* break; hSR+7qN<e } `uUzBV.FR } kN78j catch(IOException e){e.printStackTrace ();} "*.N'J\ catch(Exception e){e.printStackTrace ();} l GBg8/[ 01n132k :e nR8MS Utility.log(nFileLength); uo J0wG. H1 7I"5N AS@(]T#R return nFileLength; Kvo&_: } HZZZ [km jU7[z$GX gBi3^GxjM? //保存下载信息(文件指针位置) >*VvV/UU private void write_nPos() >X
eXd{$ { 'vZIAnB8 try{ R y#C#0 output = new DataOutputStream(new FileOutputStream(tmpFile)); 86N,04 output.writeInt(nStartPos.length); 83SK<V6 for(int i=0;i<nStartPos.length;i++) }8#Ed;%K { u~j
H
// output.writeLong(nPos); d+,!p8Q output.writeLong(fileSplitterFetch.nStartPos); "mQcc}8 output.writeLong(fileSplitterFetch.nEndPos); @$n
$f } `6J7c;: output.close(); 0bM_EC } 2/folTR7 catch(IOException e){e.printStackTrace ();} h!K"
;qw catch(Exception e){e.printStackTrace ();} zMu9A| } qar{*>LCG sdg2^] | v9-4yZU^WR //读取保存的下载信息(文件指针位置) 7~XA92 private void read_nPos() t_w\k_
T { 6>rz=yAM_ try{ \
*[Ht!y DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); 7Tdx*1 U int nCount = input.readInt(); jIT|Kk&] nStartPos = new long[nCount]; 0VtjVz*C7& nEndPos = new long[nCount]; ]"uG04"Vk for(int i=0;i<nStartPos.length;i++) g"5Kth { v0oVbHO5< nStartPos = input.readLong(); >pLJ ,Z nEndPos = input.readLong(); SfC* ZM}< } %p )"_q!ge input.close(); 1b3k|s4 } \DS*G7.A+& catch(IOException e){e.printStackTrace ();} 4tLdqs catch(Exception e){e.printStackTrace ();} J.R\h! } ygIn6.p M' z.d e[u}Vf private void processErrorCode(int nErrorCode) @ewaj! { *cXq=/s System.err.println("Error Code : " + nErrorCode); :G@z?ZJ[ } <hCO-r# ydYsmTr |{kbc0* //停止文件下载 k-=lt\? public void siteStop() xH:L6K/c { w=;> bStop = true; SgewAng?@o for(int i=0;i<nStartPos.length;i++) [?I<$f" fileSplitterFetch.splitterStop(); 3{?X>6T m8{8r>6* ,H+Y1N4W( } ao9#E"BfM } U MRFTwY //负责部分文件的抓取 4E 5;wH **FileSplitterFetch.java NJsaTBT */ mbkt7. ,P package NetFox; KF+r25uy[+ AH&RabH2 r+C4<-dT import java.io.*; %Hd[,duwO import java.net.*; N? Jy s,#We} bv Dch\k<Te public class FileSplitterFetch extends Thread { <`pNdy4 tcXXo&ZS j+i\bks String sURL; //File URL ;km`P|<U long nStartPos; //File Snippet Start Position wcrCEX=I>{ long nEndPos; //File Snippet End Position U$O\f18 int nThreadID; //Thread's ID \r/rBa\ boolean bDownOver = false; //Downing is over du<tGsy boolean bStop = false; //Stop identical g;H=6JeG/ FileAccessI fileAccessI = null; //File Access interface t|w_i-&b, F%@A6'c aB_F9;IR public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException /74QMx? { 8f_l}k$Eg this.sURL = sURL; Mc?Qx this.nStartPos = nStart; 4(#'_jS this.nEndPos = nEnd; MS
nG3]{z nThreadID = id; cb@?}(aFl fileAccessI = new FileAccessI(sName,nStartPos);//定位 y|jl[pyg) } ~G)S
O;+ maY^l ]>W6
bTK public void run() df*#!D7oz { Fh)IgzFj while(nStartPos < nEndPos && !bStop) eJrQ\>z]V& {
kq?Ms|h $6#CqWhI aR[JD2G try{ rbul8(1h URL url = new URL(sURL); `oAW7q)~ HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); 99]R$eT8 httpConnection.setRequestProperty("User-Agent","NetFox"); }cM}Oavh String sProperty = "bytes="+nStartPos+"-"; x/%aM1"X^ httpConnection.setRequestProperty("RANGE",sProperty); @tF\p
Utility.log(sProperty); AL[KpY _Mi5g_ +*\u :n InputStream input = httpConnection.getInputStream(); ]v?@g:iE //logResponseHead(httpConnection); ?#Ge.D~u G5{T5# 3t.l5m
Rg5 byte[] b = new byte[1024]; +<'Ev~ int nRead; _PPy44r2 while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) S};#+ufgTt { !zBhbmlKt nStartPos += fileAccessI.write(b,0,nRead); 2Zm0qJ //if(nThreadID == 1) <g-9T -Ky // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); nz%DM<0$ } 3W V"U x-XD.qh7Hr 5b5x!do Utility.log("Thread " + nThreadID + " is over!"); j*d
yp bDownOver = true; \S_Ou //nPos = fileAccessI.write (b,0,nRead); j
'FVz& } qjc8fP2 catch(Exception e){e.printStackTrace ();} i|c'Lbre` } *F WMn. } mD/9J5: ,y1PbA0m ) g0%{dfJ //打印回应的头信息 0mpX)S public void logResponseHead(HttpURLConnection con) FO+Zue.RS { \j+1V1t9 for(int i=1;;i++) |<HPn4
,X { \4&fxe String header=con.getHeaderFieldKey(i); &@G:G( if(header!=null) Z.c'Hs+; //responseHeaders.put(header,httpConnection.getHeaderField(header)); t=rEt>n~L Utility.log(header+" : "+con.getHeaderField(header)); . kQkC:~9 else 3Q"<<pi!~ break; *,3SGcYdJj } , qA(\[ } N<|@ymi }e!x5g "*($cQ$v public void splitterStop() rw: c { Q(@U2a8 bStop = true; Z?}dq-Vh& } MTsM]o JF # #
[O ?
K;dp } XaCX!Lr, J!0DR4=Xi {kp"nl$< /* |K6REkzr **FileAccess.java aa?w:3 *//文件访问(定位,写) Y<mej][ package NetFox; v5By :z import java.io.*; "$N#p5 y=`2\L" O 4"{ooy^Q public class FileAccessI implements Serializable{ Pdt6nzfr 0}$Hi //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 I
6<*X RandomAccessFile oSavedFile; p /#$io long nPos; XLAN Np%E !R1.7}O `0P$#5? public FileAccessI() throws IOException )=AHf?hn { y($%;l this("",0); JMH8MH* } >TQH|}|6(y <Wp
QbQM /c2w/+ _ public FileAccessI(String sName,long nPos) throws IOException L
]w/P| { =li | oSavedFile = new RandomAccessFile(sName,"rw"); |b*?
qf this.nPos = nPos; o>7ts&rk oSavedFile.seek(nPos); B<~ NS)w } J,zO2572u 1}tbH[ .N*Pl(<[ public synchronized int write(byte[] b,int nStart,int nLen) $d,0=Ci { F35#dIs`& int n = -1; JqMDqPIQ try{ ND5`Q"k
oSavedFile.write(b,nStart,nLen); C#H:-Q& n = nLen; \TF!S"V } ;>AL`M+ catch(IOException e) SL,p36N { MdXchO-Lyc e.printStackTrace (); I8QjKI ( } a\%xB >LX S?{/hy =&dW(uyzY return n; m uW!xY } dJ:MjQG`W WS2osBc 'O6]0l } O9(r{Vu7u |KY EK| -;;Z 'NM;8 /* OOBhbpg!D **SiteInfoBean.java (!5LW'3B */ to"'By{9 package NetFox; L?Yoh< `N/RHb% A\Txb_x public class SiteInfoBean { +]:2\TTGI 7:NmCpgL! z5Qs@dG private String sSiteURL; //Site's URL ftk%EYT; private String sFilePath; //Saved File's Path RE 3Z%;' private String sFileName; //Saved File's Name iP3Z private int nSplitter; //Count of Splited Downloading File Dbx~n#n G w(nHD*nm s|bM%!$1 public SiteInfoBean() p3^jGj@ {//nSplitter的缺省值为5 $\a5&1rl //default value of nSplitter is 5 ^4v*W;Q this("","","",5); Q}A=jew } V_U'P>_I ps:f=6m2 C.!_]Pxs public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) %bb~Y" { Bz2'=~J sSiteURL= sURL; (3,.3)%` sFilePath = sPath; J?:[$ C5 sFileName = sName; GgFi9Ffj this.nSplitter = nSpiltter; o5Rz%k#h
'3l$al:H^ cX2^wu } 10sK]XI nw'-`*'rj yfjXqn[Z4 public String getSSiteURL() e5v`;(^M { ? S=W& return sSiteURL; :_dICxaLZT } q(z7~:+qNr J>S3sP Il~01|3+m public void setSSiteURL(String value) FY;+PY@I{ { uf) Oy7FQ sSiteURL = value; d}0qJoH4 } Db03Nk># Fq,N j^u[F" public String getSFilePath() aCi^^}! { :6k DUFj} return sFilePath; b}L,kT } i`nw"8 #Xw[i |Sv #f2` public void setSFilePath(String value) iN4'jD^oP { @$yYljP sFilePath = value; 6`";)T[ G9 } f uNXY-; 9c %Tv Bpo68%dx89 public String getSFileName() |j}F$*SE[ { wBHDof
xX return sFileName; zomNjy* } u\geD ~d `4W<1a Jb.u^3R@ public void setSFileName(String value) khIa9Nm { >@Vr'kg+V sFileName = value; j"u)/A8* } v]U;5Uo ~%:p_td DMN H?6 public int getNSplitter() \\Tp40m+ { gbf=H8] return nSplitter; *9(1:N;# }
ykhCt\t[ [gp:nxyfQm ly%B!P| public void setNSplitter(int nCount) rg/vxTl { emPm^M5/K nSplitter = nCount; Bic {
H } 0%NI-
Zyo } :Rj,'uH+h) aBi:S3 qk 4H)"d /* 6|cl`}g_j **Utility.java i4rF~'h@ */ $i>VI package NetFox; P$Ru NF |raQ]b@t& T=dvc} public class Utility { (r\h dLX 3~xOO*`o D~&e.y/gHN public Utility() bR,Iq}p { ITlkw~'G PzDgl6C {.9phW4Vr? } 0*^)n&O LPbZ. //线程睡眠 PezUG{q( public static void sleep(int nSecond) w5"C<5^ { X#mm
Z;P try{ 11}fPWK Thread.sleep(nSecond); .fxI) } ?4=8z8((! catch(Exception e) ouKID_' { qPdNI1 | e.printStackTrace (); EzY?=<Y( } x#"|Z&Dw0 } WAiEINQ^)
;=7z!:) //日志 JNu - z:J public static void log(String sMsg) Gg!))I+ { .Yf
h* System.err.println(sMsg); fC-^[Af) } b9YpUm7# 6
%=BYDF tS9m8(Hr%Q public static void log(int sMsg) H,I}R { !7oy%{L System.err.println(sMsg); uI2'jEjO } (HI%C@e9 } p5l$On 4I*Mc%dD s]c$]&IGG /* 8:% R|b **TestMethod.java f'6qJk%J */ 2Cd
--W+= package NetFox; 0?F@iB~1F c7g.|R c[h'`KXJf- public class TestMethod { 9\>sDSCx _q)!B,y-/N HIGNRm public TestMethod() %`+'v_iu { ///xx/weblogic60b2_win.exe 2tf6GX: try{ N_G4_12( SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); W2eAhz& //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); A,BEKjR~J SiteFileFetch fileFetch = new SiteFileFetch(bean); "OL~ul5 fileFetch.start(); *d>vR1 } bxwkTKr' catch(Exception e){e.printStackTrace ();} /.$L"u rl?7W]; Uo6(|mm } :<GfET Is jK3\K/ob( *vnXlV4L public static void main(String[] args) ;JTt2qQKo { WFv!Pbq, new TestMethod(); FxW&8 9G } 8OFj0S1r` } 4^Rd{'mt 点击下载更多相关资料
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