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/* &aY/eD **SiteFileFetch.java {-o7w0d_ */ ^OsA+Ea\ package NetFox; F='Xj@&O import java.io.*;
;&K3[;a import java.net.*; #D=
tX EfFj!)fz F# jCEq public class SiteFileFetch extends Thread { A
*a{ Jz=;mrW ^a086n SiteInfoBean siteInfoBean = null; //文件信息Bean N
=x]AC, long[] nStartPos; //开始位置 GEhdk]<a7 long[] nEndPos; //结束位置 M_qP!+Y FileSplitterFetch[] fileSplitterFetch; //子线程对象 =>HIF#jU long nFileLength; //文件长度 o,g6JTh boolean bFirst = true; //是否第一次取文件 issT{&T boolean bStop = false; //停止标志 }/_('q@s\ File tmpFile; //文件下载的临时信息 =ZCH1J5" DataOutputStream output; //输出到文件的输出流 ]&&I|K_ #x, ]D //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) 2ZU@>W public SiteFileFetch(SiteInfoBean bean) throws IOException _u#/u2< { pZc9q8j3 siteInfoBean = bean; -;l`hRW //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); 7YMxr3F tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); imo'(j7 if(tmpFile.exists ()) qJsQb { .Ql;(Wyl bFirst = false; `K$:r4/[ read_nPos(); )3k)2X F } /Lq;w'|I else x%b]ea { U,oD44 nStartPos = new long[bean.getNSplitter()]; 4aj[5fhb- nEndPos = new long[bean.getNSplitter()]; +<'uw } NFdJb\ w;lx:j!Vp$ O4lxeiRgC {KW&wsI } {;]uL`abi? :`{9x%o; &i4
(s%z# public void run()
rE/}hHU { p5lR-G //获得文件长度 nvU+XCx //分割文件 Ytl:YzXCi //实例FileSplitterFetch @#bBs9@gv //启动FileSplitterFetch线程 [37f#p //等待子线程返回 wk-Mu\ try{ N2[, aU if(bFirst) {Uik| { 9)G:::8u7 nFileLength = getFileSize(); ,$hQ(yF if(nFileLength == -1) /AK*aRU^ { P Xyyyir{ System.err.println("File Length is not known!"); ?9o#%?6k } @/_XS4 else if(nFileLength == -2) hXV4$Dai { vG'vgUo System.err.println("File is not access!"); &M!4]pow } H j>L>6> else d_4n0Kh0 { [VfLv.8w for(int i=0;i<nStartPos.length;i++) qg_>`Bv"a { rg#qSrHp nStartPos = (long)(i*(nFileLength/nStartPos.length)); OhA^UP01- } tEi@p;Z> for(int i=0;i<nEndPos.length-1;i++) Ktg&G<%J0 { 1G e)p4 nEndPos = nStartPos[i+1]; sRkz
WMl } o'x_g^ Y nEndPos[nEndPos.length-1] = nFileLength; }M"-5K} } >i><s>=I` } "wc`fg"3 [15hci+- b&hF')_UOz //启动子线程 UiGUaB mF* fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; ~G|{qVO7A for(int i=0;i<nStartPos.length;i++) >#${.+y { 9*GL@_c fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), sqq/b9 uL/ siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), &(z8GYBr nStartPos,nEndPos,i); x9XGCr Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); uAPLT~ fileSplitterFetch.start(); 1A,4Aw< } hEdo,gF* // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), 18[?dV siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); Nlf&]^4(0 // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", [)b/uR nEndPos = " + nFileLength); [T$$od[. // fileSplitterFetch[nPos.length-1].start(); ve64-D PuUon6bZ MkluK=$ //等待子线程结束 _umO)]Si //int count = 0; 0{{p.n8a~ //是否结束while循环 &gKP6ANx2 boolean breakWhile = false; O"2wV +9 .R<s<] b&|YQW}~ while(!bStop) hc@;}a\Y { ey9fbS ^I write_nPos(); !0d9<SVC Utility.sleep(500); tZJ
9}\r breakWhile = true; 0qaG#&! z-{"pI W~W?<%@ for(int i=0;i<nStartPos.length;i++) Y/:Q|HnXQ { T$>=+U if(!fileSplitterFetch.bDownOver)
K|Ij71 { 6):sO/es breakWhile = false; \8C*O{w break; egIS rmL+X } +Qb2LR } \fQgiX if(breakWhile) 1W6n[Xg break; r* R- ?0k: %_i0go,^ //count++; OFPd6,(E //if(count>4) ?tal/uC // siteStop(); `rOe5Zp$ } -mWw.SfEZ <R]Wy}2- $F
/p8AraK System.err.println("文件下载结束!"); Z{R=h7P }
Do{*cSd catch(Exception e){e.printStackTrace ();} TF([yZO' } :67d>wb (cqA^.Td RIVN>G[;L //获得文件长度 \:f}X?: public long getFileSize() 5]2!Bb6> { hc4`'r; int nFileLength = -1; K\%"RgF@& try{ XTn{1[.O URL url = new URL(siteInfoBean.getSSiteURL()); ogh2kht HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); [/2@=Uh- httpConnection.setRequestProperty("User-Agent","NetFox"); 0,i+ 1<Ztk;$A []]LyWk int responseCode=httpConnection.getResponseCode(); hzf}_1 if(responseCode>=400) , K"2tb { S)AE processErrorCode(responseCode); eJwii
return -2; //-2 represent access is error :XZJx gx } KG./<"c <?`e9o qo&SJDG String sHeader; h19.b:JT ",,qFM! khO<Z^wi[ for(int i=1;;i++) "N[gMp6U { xBx?>nN //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); f"}14V //Utility.log(in.readLine()); <3]/ms sHeader=httpConnection.getHeaderFieldKey(i); b ffml if(sHeader!=null) >Gu>T\jpe. { d ;Gm {g# if(sHeader.equals("Content-Length")) V1+o3g{} { Yhv`IV-s nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); rq|czQ break; Z#E#P<&d } TlZlE^EE< } 6`PGV+3j else {10+(Vl break; 7$!Bq# } 5'}!v } fqp7a1qQl catch(IOException e){e.printStackTrace ();} FK,r<+h catch(Exception e){e.printStackTrace ();} Yv`1ySR ]H@uuPT! 98%a)s)(a Utility.log(nFileLength); Q,LWZw~" L[9+xK^g f>JzG,- return nFileLength; ki/Lf4 }
fVe-esAw :\HN?_?{4 9%hB //保存下载信息(文件指针位置) -T="Ml& private void write_nPos() *{n,4d\.. { fJN9+l try{ (h(ZL9! output = new DataOutputStream(new FileOutputStream(tmpFile)); q|Tk+JH{5 output.writeInt(nStartPos.length); %Zi,nHg8 for(int i=0;i<nStartPos.length;i++) |D_n4#X7u { SEn8t"n // output.writeLong(nPos); <PA$hTYM output.writeLong(fileSplitterFetch.nStartPos);
T?$?5 output.writeLong(fileSplitterFetch.nEndPos); 0|3B8m } }lbx output.close(); &[\arwe) } N
pIlQaMo4 catch(IOException e){e.printStackTrace ();} Fu=VY{U4 catch(Exception e){e.printStackTrace ();} bsS|!KT } E52:c]<'m UgBY
){< ,}xC) > //读取保存的下载信息(文件指针位置) J'&?=| private void read_nPos() ^|axt VhMO { X=RmCc$: try{ \>CBam8d DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); wB0WR int nCount = input.readInt(); rEyMSLN nStartPos = new long[nCount]; a\.?{/ nEndPos = new long[nCount]; z:q'?{`I for(int i=0;i<nStartPos.length;i++) \fGYJ37 { 9#ay(g nStartPos = input.readLong(); >L3p qK
nEndPos = input.readLong(); S6Xw+W02 } 2Uw}'J_N input.close(); { l~T~3/i } pc(9(. | catch(IOException e){e.printStackTrace ();} cF6@.) catch(Exception e){e.printStackTrace ();} (>% Vj } (?=(eo<N ku8Z;ONeH s`#j8>`M
private void processErrorCode(int nErrorCode) qdnNapWnc { nFOG=>c} System.err.println("Error Code : " + nErrorCode); ~wV98u-N } vTa23YDW zL=I-f Vq I(eR3d: //停止文件下载 5_T>HHR6 public void siteStop() 2/NWWoKw { -CNv=vj 3 bStop = true; S 2` ;7 for(int i=0;i<nStartPos.length;i++) S`PSFetC fileSplitterFetch.splitterStop(); Nr7.BDA 81 Not oieLh"$ } R1rfp; } X%qR6mMfT7 //负责部分文件的抓取 x{w ?X.Nt **FileSplitterFetch.java ph. :~n>z */ $BN+SD! package NetFox; (9QRg; ;(Va_
w9}IM149 import java.io.*; F>nrV import java.net.*; 3m9E2R, .}op mI }Qu
7o public class FileSplitterFetch extends Thread { k3eN;3#& zm.sX~j / S^m!{ String sURL; //File URL J*k=|+[ long nStartPos; //File Snippet Start Position JVYYwA^. long nEndPos; //File Snippet End Position c_=zd6 b$S int nThreadID; //Thread's ID %&S]cEw boolean bDownOver = false; //Downing is over ~DS9{Y boolean bStop = false; //Stop identical =hb87g. FileAccessI fileAccessI = null; //File Access interface atnbM:t %zVv3p: y9mZQq public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException *m/u 3.\ { PhdL@Mr this.sURL = sURL; 4&WzGnK this.nStartPos = nStart; Y&%0 eI! this.nEndPos = nEnd; UYLI>XSd nThreadID = id; dXN&<Q, fileAccessI = new FileAccessI(sName,nStartPos);//定位 ?XrTZ{5' } {x$#5PW 7i\[Q8f 5Wjp_^!e
public void run() uU"s50m { 6!m#_z8qG3 while(nStartPos < nEndPos && !bStop) p{GDW_ { ~UFsi VpL mjc:0hH 09i[2n;O try{ [^P2Kn URL url = new URL(sURL); iIRigW HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); !7|9r$ httpConnection.setRequestProperty("User-Agent","NetFox"); BE;iC.rW String sProperty = "bytes="+nStartPos+"-"; #J9XcD{1 httpConnection.setRequestProperty("RANGE",sProperty); dRC+|^rSC Utility.log(sProperty); uQ)]g jl7-"V>j?; SpQ6A]M gm InputStream input = httpConnection.getInputStream(); WJ,ON-v //logResponseHead(httpConnection); J?DyTs3Z )8PL7P84 9a,CiH%@ byte[] b = new byte[1024]; VUhu"h@w% int nRead; b&&'b) while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) w%na n= { yFv3>\ nStartPos += fileAccessI.write(b,0,nRead); Tl-B[CT //if(nThreadID == 1) .v!e=i}. // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); z81!F'x; } ,bg#pG!x Q ]>j_
Y, -': tpJk Utility.log("Thread " + nThreadID + " is over!"); BGOI bDownOver = true; YkbLf#2AE| //nPos = fileAccessI.write (b,0,nRead); u{^Kyo#v } H2-( catch(Exception e){e.printStackTrace ();} 4(]('[M } HX^
P9jXT } =25"qJr v-@@>?W- j$Co-b1 //打印回应的头信息 p `Z7VG public void logResponseHead(HttpURLConnection con) 21Opx~T3 { ^hJ,1{o for(int i=1;;i++) efm<bJB2 { 0cVXUTJ|W String header=con.getHeaderFieldKey(i); =$J2 if(header!=null) H|?`n
uiD //responseHeaders.put(header,httpConnection.getHeaderField(header)); P@ u%{ Utility.log(header+" : "+con.getHeaderField(header)); ~{{:-XkVB else qlP=Y .H break; s:{%1 / } *a4eL [ } U^I'X7`r fx5vaM! pj`-T"Q public void splitterStop() pDT6>2t {
|\ L2q/u bStop = true; j=LF1dG" } R8)"M(u=l ,\IZ/1 (Nf.a4O } it@s(1EO# c{q`uI;O W1z5|-T /* =nl,5^ **FileAccess.java fq'Of
wT *//文件访问(定位,写) ~1oD7=WN package NetFox; C_/oORvK import java.io.*; a6OT2B A
|B](MW%O 3lqhjA public class FileAccessI implements Serializable{ X"sN~Q.0 TM;)[R@ //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 WfVie6 RandomAccessFile oSavedFile; Z^3Risi long nPos; .nN7*))Fj OWzIea@ 82<!b]^1 public FileAccessI() throws IOException pY@+.V`a { ;f?bb*1 this("",0); kaLRI|hC } L.'N'-BV zc#`qa:0 ]SI`fja/ public FileAccessI(String sName,long nPos) throws IOException Q2o:wXvj { Nx"?'-3Hm oSavedFile = new RandomAccessFile(sName,"rw"); RPu-E9g@ this.nPos = nPos; `:&{/|uP7 oSavedFile.seek(nPos); YH9BJ } pWqahrWh SzDi=lY *SZ<ori public synchronized int write(byte[] b,int nStart,int nLen) xnTky1zq { N
Jf''e3 int n = -1; *!/9?M{p try{ ScD9Ct*):C oSavedFile.write(b,nStart,nLen); n9%rjS$ n = nLen; -Y6JU } ,yoT3_%P catch(IOException e) 1,E/So { h
? M0@Z e.printStackTrace (); B.o&%5dG } a)e2WgVB/E M:~#"lfK ]KmYPrCl0 return n; B4?P"| } K"D9. %7 >_o_&;=`v bF.Aj8ZQ } qr*/}F6 '#fj) :MpCj<<[ /* 31}6dg8?n **SiteInfoBean.java _Cxs"to */ anbr3L[! package NetFox; ZO,]h9?4 0bor/FU-d -(jcsqDk public class SiteInfoBean { $_y"P $I'ES#8P6 u=4Rn
private String sSiteURL; //Site's URL V\_
&2',t private String sFilePath; //Saved File's Path /#a$4 }2L private String sFileName; //Saved File's Name n1QO/1}
: private int nSplitter; //Count of Splited Downloading File >\e11OU0Gy >y?$aJ8ZV <K43f#% public SiteInfoBean() Bn.8wMB {//nSplitter的缺省值为5 /1Eg6hf9B //default value of nSplitter is 5 #>0nNR[$Y this("","","",5); }\@*A1*X2 } ~Oq(JM
$M '&`Zy pq 5b&'gd^d public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) 30<^0J.1 { bV"0}|A~K sSiteURL= sURL; :KQ<rLd sFilePath = sPath; uwbj`lpf sFileName = sName; 7"gy\_M this.nSplitter = nSpiltter; t((0]j^ vm(% u!_P Co'dZd( } A9"ho}< -kJ`gdS 8?PNyO-Wt5 public String getSSiteURL() gw H6r3=y( { =0Nd\ return sSiteURL; 'b-}KDP } X0m\
EfOJ%Xr[,l 1&dWt_\ public void setSSiteURL(String value) m^wYRA. { qwN-VCj sSiteURL = value; oOuWgr]0 } u~K4fP 7&X^y+bMe6 9N9;EY-U public String getSFilePath() =KX:&GU { NK#f Gz*,( return sFilePath; k?_Miqr } hE>Mo$Q( |[*b[O
1W B$fL);l- public void setSFilePath(String value) /vBp Rm { 6JJ%`Uojh sFilePath = value; !4|7U\; } HH>]"mv /@0wbA .6r&<* public String getSFileName() P5[.2y_qM { o0AREZ+I return sFileName; rt f}4. } 291v
R] 'E6)6N myH#.$=A public void setSFileName(String value) !bQ5CB { zE<}_nA sFileName = value;
MgA6/k } 8}4V$b`Z 9] l7j\L m#Rll[ public int getNSplitter() (}'0K? { {4
*ob@w* return nSplitter; B&"fPi } fk=_ Y 6%:N^B=%} =YI<L8@g~ public void setNSplitter(int nCount) _Nw-|N . { Zx3m$.8 nSplitter = nCount; p!173y,nL } 9kTU|py } SFTThM]8M1 HuG|BjP H$Q_K<V /* KN5.2pp **Utility.java {eS!cZJ */ oveW )~4 package NetFox; nNf/$h#;O o: qB#8X \T>f+0=4 public class Utility { :h" Y >1P gJ :Z7b jytfGE: public Utility() \
3ha { {,,w5/k^ 6:@tHUm f ~9ADb } @va6,^) 7|*|xLrVY //线程睡眠 ]^R;3kU4Q public static void sleep(int nSecond) D[ny%9 : { " J$vt` try{ wtaeF+u-R- Thread.sleep(nSecond); dnH?@K } .Q4EmpByCg catch(Exception e) jf@#&%AC9 { FK0nQ{uB" e.printStackTrace (); RaKL KZn } VcA87*pel } YaDr6) Sky!ZN'I //日志 Xrc0RWXB8 public static void log(String sMsg) .pK_j~}P { xrp%b1Sy System.err.println(sMsg); 5)nm6sf } 1:XT r $yBU
,lu} +!CG'qyN> public static void log(int sMsg) c[f { ^|(F|Z System.err.println(sMsg); XzkC ]e' } UJ2Tj+ } g#W )EXUR v~9PS2 5'Y @c /* *ix&"|h **TestMethod.java @ITJ}e4 */ vA*!82 package NetFox; fU8 &fo%ER hVd%
jU: {b}Ri&oEOH public class TestMethod { ^F/N-!}q +<(N]w* D`V03}\- public TestMethod() k& 2U& { ///xx/weblogic60b2_win.exe "o+<
\B~ try{ QQj)"XJ29 SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); ?v\A&d //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); IR(qjm\V SiteFileFetch fileFetch = new SiteFileFetch(bean); Lp.,:z7 fileFetch.start(); $<OX\f% } bODCC5yL catch(Exception e){e.printStackTrace ();} [8v v[n/ sFsp`kf =]K;" } @Xts}(L P{h;2b{ An{`'U(l public static void main(String[] args) qk<(iVUO { kFg@|#0v9 new TestMethod(); gG!L#J? } kl,I.2- } `qbf_;\ 点击下载更多相关资料
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