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/* .?7So3 **SiteFileFetch.java {&b-}f"m */ ^)'||Ly package NetFox; ,|>nF;.Y import java.io.*; otZ JY) import java.net.*; vKV{
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/bEpi public class SiteFileFetch extends Thread { 0MhxFoFO J2x$uO{Bn akY6D]M SiteInfoBean siteInfoBean = null; //文件信息Bean -hm9sNox long[] nStartPos; //开始位置 t"FRLC long[] nEndPos; //结束位置 }8X:?S
% FileSplitterFetch[] fileSplitterFetch; //子线程对象 +0)5H>h long nFileLength; //文件长度 {S# 5g2 boolean bFirst = true; //是否第一次取文件 OQ
0b$qw boolean bStop = false; //停止标志 $M%}Oz3* File tmpFile; //文件下载的临时信息 2}1!WIin DataOutputStream output; //输出到文件的输出流 |oB]6VS` [kQ"6wh8 //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) gB'`I(q5. public SiteFileFetch(SiteInfoBean bean) throws IOException 1W4H-/Re { %0go%_ siteInfoBean = bean; P}b Dn; //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); \>_eEZ5 tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); <kk'v'GW@ if(tmpFile.exists ()) 72%
{Wh/ { ~9]Vy
(L bFirst = false; 1gO//fdI read_nPos(); IrUpExJ } 9 ?[4i' else rUhWZta { )Ep@$Gv|S nStartPos = new long[bean.getNSplitter()]; -1dIZy nEndPos = new long[bean.getNSplitter()]; yzODF>KJ } :
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8VKb* } bK6, saN> an #jZ[ t/_\U=i$ public void run() :^C#-O { DB!uv[c //获得文件长度 t4*aVHT //分割文件 /<Gyg7o0 //实例FileSplitterFetch 4j2~"K //启动FileSplitterFetch线程 UEk|8yq //等待子线程返回 7UY('Q[ try{
pyGFDB5_P if(bFirst) &FT5w T { *s
1D\/H nFileLength = getFileSize(); ,<IL*=a if(nFileLength == -1) pvK \fSr { 1j_aH#Fz: System.err.println("File Length is not known!"); 5QCw5N } F^J&g%ql else if(nFileLength == -2) 0fEZD$ { xow6@M, System.err.println("File is not access!"); dpl"}+ } Vu^Q4Z else 2*b#+ b { !^rITiy for(int i=0;i<nStartPos.length;i++) gt(X!iN] { Ss*LgK_ nStartPos = (long)(i*(nFileLength/nStartPos.length)); R
A-^!4tX } ~M|NzK_9 for(int i=0;i<nEndPos.length-1;i++) `K@5_db\ { >c~9wv nEndPos = nStartPos[i+1]; ~{kA) : } Uj
y6vgU; nEndPos[nEndPos.length-1] = nFileLength; F=P+;%. } Mr@<ZTw } h Js&rpN UeIqAG 8 mCZF5r //启动子线程 D"1vw<Ak fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; j X^&4f for(int i=0;i<nStartPos.length;i++) !c3Qcva { vgd}09y fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), loAfFK>g siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), (dw3'W nStartPos,nEndPos,i); OoA5!HEh Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); ?}!gLp fileSplitterFetch.start(); W_Ws3L1;N } htNL2N // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), @p?b"?QaB siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); 3(XHF3q // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", [v>Z( nEndPos = " + nFileLength); Al;%u0]5 // fileSplitterFetch[nPos.length-1].start(); Q)7L^ {g23[$X]N >*ha#PE //等待子线程结束 xP|%rl4 //int count = 0; ]-+.lR%vd9 //是否结束while循环 kfG 65aa>_ boolean breakWhile = false; N23+1 h ;8
/+wBnm +)''l while(!bStop) a`GN@
8 { E:LQ! write_nPos(); 9|?(GG Utility.sleep(500); ;Fwm1ezx0 breakWhile = true; nATfmUN
L \I`=JKYT 6>P for(int i=0;i<nStartPos.length;i++) xhp-4 { 6O[wVaC1u if(!fileSplitterFetch.bDownOver) A(_^_p.| { a v|6r# breakWhile = false; 1' @lg*^9 break; eO[Cb]Dy: } bo?3E +B } ]CtoK%k if(breakWhile) e-duZ o break; DftGy:Ah3 0wa!pE" Ot8S'cB1,$ //count++; %o_0M^3W //if(count>4) g)|++? // siteStop(); 3
MI ) E }
EY[Q% Bb2r95h}^ aZ`_W| System.err.println("文件下载结束!"); olQ8s* } AD4L`0D catch(Exception e){e.printStackTrace ();} 6@Z'fT4 } s5Bmv\e.i5 4jyr\=42F' wshp{ y //获得文件长度 qyG636i public long getFileSize() e8ig[:B>+ { u^4 "96aXJ int nFileLength = -1; 1RUbY>K#U try{ >stVsFdV) URL url = new URL(siteInfoBean.getSSiteURL()); p'w"V6k('~ HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); U!-+v:SF httpConnection.setRequestProperty("User-Agent","NetFox"); "3>*i!i ?H86Wbz E[htB>< int responseCode=httpConnection.getResponseCode(); %?9r (& if(responseCode>=400) R4rm>zisVX { O|7{%5h processErrorCode(responseCode); Ns(L1'9= return -2; //-2 represent access is error Vlxb<$5Nh } yPxG`w' bQ\ -6dOtv g,GbaaXH String sHeader; q MT.7n: -GkK[KCH #SLxN AH for(int i=1;;i++) S&))
0d { +qW w-8 //DataInputStream in = new DataInputStream(httpConnection.getInputStream ());
qzbkxQu]g //Utility.log(in.readLine()); ?GD?J(S sHeader=httpConnection.getHeaderFieldKey(i); ]OCJ~Zw if(sHeader!=null) -L4G WJ~.- { %F]9^C+ if(sHeader.equals("Content-Length")) n4_:#L? { 'rq#q)1MT nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); E{]|jPdr break; 'Tan6Qa } mEc;-b
f } g KmRjK else `J7Lecgo break; f [I'j0H% } pNf9 } ]ieA?:0Hi catch(IOException e){e.printStackTrace ();} f/WM}Hpj catch(Exception e){e.printStackTrace ();} i7!mMO8] ZT6X4 Z :iOHc-x Utility.log(nFileLength); Z6/~2S@ X.4ZLwX=
8JOht(m return nFileLength; Y1ilH-8 } S%gO6&^ OFL+Q~~C j6d"8oH
_ //保存下载信息(文件指针位置) byj mH private void write_nPos() G mUs U{ { 41Q try{ huD\dmQ:] output = new DataOutputStream(new FileOutputStream(tmpFile)); Rc.<0# output.writeInt(nStartPos.length); {hq ;7 for(int i=0;i<nStartPos.length;i++) <GmrKdM { hz|z&vyP // output.writeLong(nPos); {S:3
FI output.writeLong(fileSplitterFetch.nStartPos); uV$d7(N}" output.writeLong(fileSplitterFetch.nEndPos); &*:)5F5 } 7LZb*+> output.close(); ].T;x| } 5!Mp#lO catch(IOException e){e.printStackTrace ();} C`T5d catch(Exception e){e.printStackTrace ();} h/bYtE } ?UhAjtYIS W
me1w\0 >,]e[/p //读取保存的下载信息(文件指针位置) y!c7y]9__2 private void read_nPos() ez:o9)N4 { IV#My9}e try{ ]}L1W`n DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); #V,~d&_k int nCount = input.readInt(); xjk|O;ak nStartPos = new long[nCount]; S^`9[$KH0 nEndPos = new long[nCount]; Ty|c@X for(int i=0;i<nStartPos.length;i++) F*( A; N_y { pC.4AkEO nStartPos = input.readLong(); N4(VRA nEndPos = input.readLong(); :yFCp@& } >s?;2T2"yx input.close(); 1Kf
t?g } lGBdQc]IL catch(IOException e){e.printStackTrace ();} ITqigGan% catch(Exception e){e.printStackTrace ();} LmdV@gR } mb`}sTU). w8#>xV^~ \R6T"U private void processErrorCode(int nErrorCode) R M+K":p { 0Lz56e'j System.err.println("Error Code : " + nErrorCode); Q/`o6xv } 1xV1#'@[Jd Wq&c,H
m]}"FMH$ //停止文件下载 19{?w6G<k public void siteStop() b/}0
&VXo { &r%^wfp bStop = true; r9'H7J for(int i=0;i<nStartPos.length;i++) 92_H!m/ fileSplitterFetch.splitterStop(); 'R5l
=Wf nln[V$ HZ4
^T7G } I[IQFka} } OL"5A18;M //负责部分文件的抓取 <l/Qf[V **FileSplitterFetch.java s/0FSv
x */ >:nJTr package NetFox; R:m=HS_ QD VA*6F DJjDKVO5t import java.io.*; >mSl~.I2 import java.net.*; #@"rp]1xv >ZsK5v w7V
W public class FileSplitterFetch extends Thread { +NMSvu_? TmAb!
Y|F 4\WkXwoqQO String sURL; //File URL k6XmBBIj- long nStartPos; //File Snippet Start Position
!@1!ld long nEndPos; //File Snippet End Position Mo|5)8_ int nThreadID; //Thread's ID *n?:)( boolean bDownOver = false; //Downing is over 6T_c#G5 boolean bStop = false; //Stop identical nW*Oo|p~= FileAccessI fileAccessI = null; //File Access interface zb)SlR ]J]p:Y>NL j=QjvWD public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException &c ~)z\$ { X^^ D[U this.sURL = sURL; TL:RB)- < this.nStartPos = nStart; h;[Ncj] this.nEndPos = nEnd; T=Q{K|JE nThreadID = id; $oj<yH<i fileAccessI = new FileAccessI(sName,nStartPos);//定位 O~]G(TMs8W } &}=,8Gt1G {moNtzE; ,OAWGFKOp public void run() d>psqmQ { l(4./M while(nStartPos < nEndPos && !bStop) ,Gx=e!-N5 { "g[UX{L _I5+o\;1 xF+x I6 try{ "evV/Fg( URL url = new URL(sURL); &"n9,$ HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); SVz.d/3Y httpConnection.setRequestProperty("User-Agent","NetFox"); }CqIKoX. String sProperty = "bytes="+nStartPos+"-"; zKT<QM!` httpConnection.setRequestProperty("RANGE",sProperty); 8}@a?QS(& Utility.log(sProperty); <9ph c a8c]B/ Rx2|VD InputStream input = httpConnection.getInputStream(); PyE<`E //logResponseHead(httpConnection); t4uxon 8#B;nyGD1I 2@rc&Tx byte[] b = new byte[1024]; ~h+3WuOv int nRead; DO{4n1-U while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) (E[hl { &p/k VM nStartPos += fileAccessI.write(b,0,nRead); >@iV!! //if(nThreadID == 1) biK.HL\V // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos);
&|*| } >X)G`N@! H>9$L~ bc-}Qn Utility.log("Thread " + nThreadID + " is over!"); z8MYgn7 bDownOver = true; _?<Fc8F //nPos = fileAccessI.write (b,0,nRead); e0 EJ[bG } F4Z0g*^x catch(Exception e){e.printStackTrace ();} ,/9|j*9H } Jq)k?WS } x|5/#H 5Px_vtqP OD|&qsbL //打印回应的头信息 ]uf_"D public void logResponseHead(HttpURLConnection con) P*]g*&*Y + { u1<kdTxA
N for(int i=1;;i++) [%:NR { Pp!W$C: String header=con.getHeaderFieldKey(i); `BY`ltW if(header!=null) (FHh,y~v //responseHeaders.put(header,httpConnection.getHeaderField(header)); )cXc"aj@s Utility.log(header+" : "+con.getHeaderField(header)); z>~3*a9& else $i
Tgv?.Q break; s<]l[Y> } "'(4l 2. } LJx
g ,55`s#; !2}Q9a public void splitterStop() ,;y^|X { o 8U2vMH bStop = true; 'Ud5;?{ } zFIKB9NUn {]]I4a ~gD]JiiA } HY:n{=o ok'1 k=[Ro
/* 2rM i~8T **FileAccess.java P2kZi=0 *//文件访问(定位,写) MiRB*eA package NetFox; ~5b %~: import java.io.*; 107SXYdhI EzaOg| ^y,ip=<5\3 public class FileAccessI implements Serializable{ OoNAW< }2S \- //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 oCS NA.z RandomAccessFile oSavedFile; Mtr~d long nPos; bMYRQ,K`C D~} 4N1 W%o){+, public FileAccessI() throws IOException x4K5 { FKP^f\!M this("",0); j&9~OXYv } NINiX( F)G#\r K^ lVng public FileAccessI(String sName,long nPos) throws IOException Ge x^\gf { 2StpcAlU} oSavedFile = new RandomAccessFile(sName,"rw"); n_Z8%|h this.nPos = nPos; c=gUY~Rl oSavedFile.seek(nPos); EMo6$( } "M
tQj} yY+2;`CH 6-~ public synchronized int write(byte[] b,int nStart,int nLen) "?!IPX2\S { b8Qm4 b?:4 int n = -1; ~oI49Q&{ try{ t9}XO M* oSavedFile.write(b,nStart,nLen); F-6*
BUqJ n = nLen; @N$r'@ } $W2AiE[Wm catch(IOException e) +J} 41 { fiZ8s=J e.printStackTrace (); >cp9{+#f } -'2.^a-8-g ?cJ$= jL# ak V return n; *=8)]_=f } +2?[=g4;} _:z~P<%s 7]Egu D4 } ! 9e>J d dPJx< z} %to0W /* ^$(|(N[; **SiteInfoBean.java BC+HP9<] */ qhtc?A/0} package NetFox; )q,}jeM8 :/3`+&T^/ nF-FoO98 public class SiteInfoBean { Z6=!}a% /H)g<YA iw{n|&Y#` private String sSiteURL; //Site's URL cA*%K[9 private String sFilePath; //Saved File's Path {MS&t09Wh private String sFileName; //Saved File's Name P+/L,u private int nSplitter; //Count of Splited Downloading File gSC@uf Pzqgg43Xf kU /?#s public SiteInfoBean() 1ysA~2 {//nSplitter的缺省值为5 buoz La //default value of nSplitter is 5 .q=X58tHu this("","","",5); mH?hzxa+ } xU&rUk/L @ZVc!5J_, 17 GyE=Uu public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) H\^^p!^) { 1Nz\3]- sSiteURL= sURL; ..!yf e"5 sFilePath = sPath; LV[4z o]= sFileName = sName; kxP6#8*: this.nSplitter = nSpiltter; yU\|dL %guot~S| YP7<j*s8 } z7CYYU? #wo_ 4eKJ\Q=nX5 public String getSSiteURL() M]W4S4&Y= { YcI]_[ return sSiteURL; 5Ql6?UHD } <[q)2 5RL A-~)7- gp}S 1 public void setSSiteURL(String value) k4@GjO1"$ { #\jPBLc sSiteURL = value; H0Tt(:.& } T&c[m!}X|t 7+c@pEU] dug RO[ public String getSFilePath() 1{wy%|H\ { 41.+3VP return sFilePath; RsbrD8*AD } vw3W:TL 2vwT8/ GP[$&8\M public void setSFilePath(String value) ZGrV? @o,6 { [`&cA#C9Yp sFilePath = value; >A)he!I } ua{eri[ %H@fVWe2wT }X$>84s>[P public String getSFileName() 5ZSw0A(w { 5t PmrWZ return sFileName; $&4Z w6"= } ;R67a
V, 0QPipuP ed{9UJWh public void setSFileName(String value) XH. _Z { HqbTJ!a sFileName = value; ED6H } Q.N^1?(>k WgIVhj a}fW3+> public int getNSplitter() <sTaXaq? { T4UY%E!0 return nSplitter; 2|T@ } mMMu'N 5pDxFs=v 4uv }6&R public void setNSplitter(int nCount) 4, :D4WYWD { 7fVVU+y nSplitter = nCount; Uq&|iB#mF } n;MoMGnPh, } a5)+5 $yt|nO l0
1Lg6+S /* []Z6<rC| **Utility.java 4jXyA/F9V */ FPqgncBHK package NetFox; $UH_)Q2#J^ [-%oO w#o<qrpHf public class Utility { 0
cQf_o :9)>!+|' l+#` public Utility() $Fo ,$ { iX,Qh2(ig vEb~QX0~ eBP
N[V } P}PSS#nn (cMrEuv //线程睡眠 U9@q"v- public static void sleep(int nSecond) wU=(_S,c { Ji7A9Hk try{ ;[|x5o/< Thread.sleep(nSecond); gcz1*3) } j;'NJ~NZ$ catch(Exception e) ~r{Nc j { gh~C.>W}q+ e.printStackTrace (); lr|-_snx2 } 0
xXAhv-)O } j\ )Qn2r -?GYW81Q //日志 Lrk^<:8; public static void log(String sMsg) Xc@4(Nyp { jHFdDw|N` System.err.println(sMsg); "zqt'b0bW } R; IB o gDA hl VA]%i P,O- public static void log(int sMsg) xX&*&RPZ { ch-GmAj
9 System.err.println(sMsg); #)\KV7f!; } !?KY;3L: } x|Q6[Y Y!SD^Ie7! Pukq{/27 /* c,+oH<bZZs **TestMethod.java `T mIrc */ %Jw;c`JM package NetFox; ;DRJL
<=0_[M ?1[go+56X public class TestMethod { c xX DO0["O74 |S.-5CAh4 public TestMethod() Y H?>2u { ///xx/weblogic60b2_win.exe pE=wP/# try{ Im#3sn SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); 2Ay2
G- //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); ?.4u'Dkn= SiteFileFetch fileFetch = new SiteFileFetch(bean); N!P* B$d fileFetch.start(); al^ yCoB } WjA)0HL( catch(Exception e){e.printStackTrace ();} b]J_R"} (5atU |8r NE/3aU } ]ao]?=q C \ii^F?+b x*_c'\F| public static void main(String[] args) )EO$JwQ { 4YdmG.CU new TestMethod(); /423!g0Q } :CV&WP } aZmSCi:&' 点击下载更多相关资料
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