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/* @>*r2=#14 **SiteFileFetch.java \NZ@>on */ $MqEM~^= package NetFox; !K6:5V%q$ import java.io.*; ";jKTk7 import java.net.*; h0] bIT{ \
[bJ@f*." mWF\h>]|. public class SiteFileFetch extends Thread { {8 # |G)P
I`BH ;b}cn!U] SiteInfoBean siteInfoBean = null; //文件信息Bean (3WK2IM^ long[] nStartPos; //开始位置 !i_~<6Wa7 long[] nEndPos; //结束位置 NvvD~Bb FileSplitterFetch[] fileSplitterFetch; //子线程对象 ;#L]7ZY9:- long nFileLength; //文件长度 B[~Q0lPih boolean bFirst = true; //是否第一次取文件 <UY9<o boolean bStop = false; //停止标志 &PPYxg< File tmpFile; //文件下载的临时信息 QtA@p DataOutputStream output; //输出到文件的输出流 MxOIe|=& F9k}zAY\J //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) 4C[kj public SiteFileFetch(SiteInfoBean bean) throws IOException 2?F?C { Z.`0 siteInfoBean = bean; 97dF //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); =)}Yw) tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); 5/R
~<z if(tmpFile.exists ()) O03F@v { %?3$~d\n bFirst = false; d ATAH}r& read_nPos(); [HhaBy9 } u"Mf xW` else #y'p4Xf { W=y9mW|p/ nStartPos = new long[bean.getNSplitter()]; Y() ZM nEndPos = new long[bean.getNSplitter()]; s<;{q+1# } cv;2zq=T P6")OWd liBFx6\"S Wr@q+Whq } 7)RRCsn Z+=WICI/2 >,.\`.0 public void run() '|}H,I{ { /.(~=6o5 //获得文件长度 dt0(04 //分割文件 l,5isq
;m //实例FileSplitterFetch E5?$=cL? //启动FileSplitterFetch线程 r`$P60,@C //等待子线程返回 c_t7< try{ MO?
}$j if(bFirst) )Fw#]~Z { Fr-Vq=j& nFileLength = getFileSize(); H
vHy{S4 if(nFileLength == -1) ]F"P3': { He%v 4S System.err.println("File Length is not known!"); >3,}^`l } @YVla!5O@ else if(nFileLength == -2) ^9]g5.z: { H6Ytp^~> System.err.println("File is not access!"); _0y]U];ce } OKAmw>{ else WHqw=!G { ps^["3e for(int i=0;i<nStartPos.length;i++) *uSlp_;kB { ZENblh8fs nStartPos = (long)(i*(nFileLength/nStartPos.length)); +Ht(_+To1 } _;R#B`9Iu for(int i=0;i<nEndPos.length-1;i++) TrNh,5+b { Q3'P<"u nEndPos = nStartPos[i+1]; q;#bFPh } -v:3#9uX) nEndPos[nEndPos.length-1] = nFileLength; ,kUg"\_k } ,4k3C#!.i } @vL0gzE?nB y4VO\N!
!hE F.S //启动子线程 $
nMx#~>a fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; 7q:;3;"9 for(int i=0;i<nStartPos.length;i++) >}/T&S { ?BbEQr fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), );?tGX siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), C`uL
4r nStartPos,nEndPos,i); >|0I\{C Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); 1ed^{Wa4$9 fileSplitterFetch.start(); {suQ"iv } }rnu:7 // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), p&\DG siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); : rudo[L // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", 'UTMEN& nEndPos = " + nFileLength); b>9?gmR{ // fileSplitterFetch[nPos.length-1].start(); 7q{yLcC" dA<SVk*0Q '@zMZc! //等待子线程结束 o?+?@Xb' //int count = 0; DHbS=Iih //是否结束while循环 n<F3&2w boolean breakWhile = false; ItVVI"- p<&>1}j= Y/LS(b* while(!bStop) "Bz#5kqnl { i~3\dp write_nPos(); >[~`rOU*|Y Utility.sleep(500); Nfv`
)n@ breakWhile = true; Y\
;hjxR- ZXf&pqmG ^E)8Sb9t for(int i=0;i<nStartPos.length;i++) ~@e=+Z { -=n!k^?lK if(!fileSplitterFetch.bDownOver) EpTc{ { Rl_1g`84 breakWhile = false; j3S!uA?
break; ~mZ[@Z } ~S<}q6H. } 9yu#G7 if(breakWhile) 'j?H>'t{ break; Hn/V*RzQ uc\G)BN N/1xc1$SB //count++; l*Fp}d. //if(count>4) dKevhm)R" // siteStop(); :bCswgd[ } FuAs$; F ^lau f @PK
1 System.err.println("文件下载结束!"); &g=6K&a$a } AbQnx%$u catch(Exception e){e.printStackTrace ();} U.=TjCW } |Qpd<L dZddoz_ ]
p v!Ll //获得文件长度 rKTc6h:) public long getFileSize() y>cT{ )E$ { -vh\XO int nFileLength = -1; mR#"ng try{ @Hr1.f URL url = new URL(siteInfoBean.getSSiteURL()); kLXa1^Lq HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); L"uidd0(g httpConnection.setRequestProperty("User-Agent","NetFox"); e5w0}/yW/ [Kb)Q{=) %/}d'WJR int responseCode=httpConnection.getResponseCode(); d6zq,x!cI if(responseCode>=400) %][zn$aa| { 9U@>&3[v processErrorCode(responseCode); <W^>:!?w return -2; //-2 represent access is error ^e80S^ } w;kiH+& &Gm3 z)R\WFBW String sHeader; RF~c/en #8%~ u+"N 821
6_Qm for(int i=1;;i++) P`
Gb}]rW { 0OnqKgf //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); }_Y\6fcd //Utility.log(in.readLine()); '
R= O eH sHeader=httpConnection.getHeaderFieldKey(i); M{=p0?X if(sHeader!=null) &$h#9 { dd@
D
s if(sHeader.equals("Content-Length")) vtzbF1?O { 3=0b nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); UY)Iu|~0b break;
:Z6l)R+V } xo(>nFjo } WpkCFp else Hx9lQ8 break; @[5] ?8\o } /1hcw|cfC } BtQqUk#L2 catch(IOException e){e.printStackTrace ();} Lf;Uv[^c catch(Exception e){e.printStackTrace ();} |9)y<}c5oM _1jeaV9@ K~qKr<) Utility.log(nFileLength); w3Dqpo8E n ,@ge l HZ4N{n return nFileLength; -(E-yCu } Q.fD3g +X>Aj=# x139Ckn //保存下载信息(文件指针位置) ciN*gwI) private void write_nPos() ko~e*31_E { JNI&]3[C>? try{ xfqU
atC output = new DataOutputStream(new FileOutputStream(tmpFile)); zB6&),[,v output.writeInt(nStartPos.length); 9"dZ4{\! for(int i=0;i<nStartPos.length;i++) //#]CsFiP { !!])~+4pP // output.writeLong(nPos); d81[hT}q output.writeLong(fileSplitterFetch.nStartPos); h|EHK!<"8 output.writeLong(fileSplitterFetch.nEndPos); x`K"1E{2 } '~x jaa;. output.close(); u}jC$T>2%6 } 7[M@;$ catch(IOException e){e.printStackTrace ();} z~jk_|?|? catch(Exception e){e.printStackTrace ();} &qm:36Y7Xg } Eq5X/Hx 0}\8,U k[1w] l8 //读取保存的下载信息(文件指针位置) {dvsZJj private void read_nPos() n&E/{o( { eM^Y try{ "gXvnl DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); #aadnbf int nCount = input.readInt(); bFfDaO<k nStartPos = new long[nCount]; Rts}y:44 nEndPos = new long[nCount]; UJ&gm_M+kL for(int i=0;i<nStartPos.length;i++) ASr3P5/ { x'
3kHw nStartPos = input.readLong(); %;O# y3, nEndPos = input.readLong(); okBaQH2lUl } B,A\/%< input.close(); '~pZj"uy } ^!K 8nW{* catch(IOException e){e.printStackTrace ();} E{'\(6z_ catch(Exception e){e.printStackTrace ();} J*qo3aJjE } / KKA/ A$]#f Hnbd<?y
private void processErrorCode(int nErrorCode) B(pHo&ox
{ U> {CG+X System.err.println("Error Code : " + nErrorCode); I!~3xZ } QaAMiCZFR ^K!R4Y4t ;Y$d!an0 //停止文件下载 )GJlQ1x public void siteStop() z_:r&UP`" { s1zkkLw`* bStop = true; :LD+B1$y for(int i=0;i<nStartPos.length;i++) m8&XW2S fileSplitterFetch.splitterStop(); AKAxfnaR Jv D`RUh Cx8
H } ns&(g^ } `u7twW*U2 //负责部分文件的抓取 Ap`D{u/ **FileSplitterFetch.java ~h444Hp= */ \3cg\Q+~ package NetFox; OLDEB.@ UG,n
q {ALOs^_- import java.io.*; -V}ZbXJD import java.net.*; &fifOF#[e [&{NgUgu" 21\?FQrz public class FileSplitterFetch extends Thread { P)hawH= x_x|D|@wM 9q"G g? String sURL; //File URL h>"Z=y long nStartPos; //File Snippet Start Position cP8@'l@! long nEndPos; //File Snippet End Position Ijs=4f int nThreadID; //Thread's ID 1)!]zV boolean bDownOver = false; //Downing is over GoG_4:^#h boolean bStop = false; //Stop identical $I90KQB\_ FileAccessI fileAccessI = null; //File Access interface A|P
`\_ b'4r5@GO Td![Id public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException 20mZ{_% { jp-]];:aPJ this.sURL = sURL; Ji:0J},m this.nStartPos = nStart; }/Y)^ this.nEndPos = nEnd; 8?k.4{? nThreadID = id; B4;P)\2 fileAccessI = new FileAccessI(sName,nStartPos);//定位 5>M@
F0 } < nyk:E OY(znVHU ] Oe[;<I public void run() m{0u+obi&w { JT 5+d , while(nStartPos < nEndPos && !bStop) ,
-S n { ~8G cWy6 OGU#%5"< lV2MRxI try{ )1]LoEdm` URL url = new URL(sURL); h3kBNBI ) HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); =|bW >y httpConnection.setRequestProperty("User-Agent","NetFox"); eR5+1b String sProperty = "bytes="+nStartPos+"-"; nB86oQ/S httpConnection.setRequestProperty("RANGE",sProperty); 1V1T1 Utility.log(sProperty); !)'|Y5 o 69/qH_Y $6\W8v InputStream input = httpConnection.getInputStream(); Jl,\^)DSw //logResponseHead(httpConnection); ]mvVX31T iMOf];O) TZk.h8 byte[] b = new byte[1024]; fT_swhIO int nRead; Qmn'G4#@E while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) 'P~6_BW { (ZuV5|N nStartPos += fileAccessI.write(b,0,nRead); `G.:G/b%H //if(nThreadID == 1) <2RxyoDL6 // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); AkRZUj\ } _k.gVm 6 0Obek` YiPp#0T[Gx Utility.log("Thread " + nThreadID + " is over!"); J*O$)K%Hx bDownOver = true; 1Du9N[2'P //nPos = fileAccessI.write (b,0,nRead); b1qli5 } BXo9s~5Q catch(Exception e){e.printStackTrace ();} q9"~sCH } Fgg4QF } _d/ZaCx'i ,@*`2I>` {p@uj_pS //打印回应的头信息 j\8'P9~% public void logResponseHead(HttpURLConnection con) EM.rO/qcW { uDi#a~m@ for(int i=1;;i++) %uLyL4*L(p { 9CTvG zkw String header=con.getHeaderFieldKey(i); $U/_8^6B0 if(header!=null) !#8=tO //responseHeaders.put(header,httpConnection.getHeaderField(header)); 4Vi&Y')f Utility.log(header+" : "+con.getHeaderField(header)); q! U'DDEP else 7?JcB?G4 break; }D eW2Jp }
j>OB<4?.+ } /I&b5Vp =Z(#j5TGvH iP~dH/B|v public void splitterStop() 15FGlO<< { 7'xds bStop = true; ,W/D 0 } S+YbsLf ~cEr<mzR mDp|EXN } Z;JZ<vEt92 9#@CmiIhy vXM``| /* 3M&75OE **FileAccess.java L&nGjC+Lr *//文件访问(定位,写) VCvqiHn package NetFox; oWUDTio#[ import java.io.*; {m%X\s;ni XP-4=0 zd wfrWpz=FO public class FileAccessI implements Serializable{ ?RD)a`y51 S[ ,r.+ //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 C&'Y@GE5 RandomAccessFile oSavedFile; {XNu4d9w( long nPos;
8Cr?0Z q}["Nww- jTx,5s- public FileAccessI() throws IOException [Pt5c6 L: { qlg~W/ this("",0); {9Op{bZ } :I }_ f6P5J|' g3%t+>$* public FileAccessI(String sName,long nPos) throws IOException rXz,<^Hmj { Ucnit^, oSavedFile = new RandomAccessFile(sName,"rw"); !Jj=H()} this.nPos = nPos; ngJES`0d oSavedFile.seek(nPos);
oB$D& } rkl/5z?? |7I.DBjR; Bv |Z)G%RR public synchronized int write(byte[] b,int nStart,int nLen) | JL47FR { ]eq3cwR[| int n = -1; C6eo n4Ut try{ [J+K4o8L<A oSavedFile.write(b,nStart,nLen); "t"=9:_t n = nLen; L$x/T3@ } `#X{. catch(IOException e) yREO;m|o { n6nwda e.printStackTrace (); c"J(? 1O } %;PPu$8K9 W3K"5E0ck YAZ=-@]`\ return n; bct&ge7YX } [M2,bc8SJV p$@=N6)I.k GKPqBi[rO } _wf"E(c3D 9bXU!l[ }~-)31e'` /* \'"q6y **SiteInfoBean.java -zz9k=q */ h3xX26l package NetFox; 4#=!VK8ZH Xb3vvHdI eeb8v:4 public class SiteInfoBean { #
dxlU/* |_~BV&g,N $zz=>BOk private String sSiteURL; //Site's URL .?S#DS ) private String sFilePath; //Saved File's Path sa+:c{ private String sFileName; //Saved File's Name AJ:@c7:eS private int nSplitter; //Count of Splited Downloading File $b$r,mc yZFvpw|g tQJ@//C\z public SiteInfoBean() +.\JYH=yEr {//nSplitter的缺省值为5
v-[|7Pg}Z //default value of nSplitter is 5 OG 5n9sx this("","","",5); rf1nC$Sop } ;Xgy2'3 g)&-S3\ :N)7SYQT public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) INzQ0z-z { !1"~tA!+p= sSiteURL= sURL; `U`Z9q5- sFilePath = sPath; 9LJ/m\bi sFileName = sName; =4 JVUu~Z this.nSplitter = nSpiltter; +Mm0bqNN 4b3p,$BWS <k^9l6@ } WM=kr$/3 x'JfRz -07(#> public String getSSiteURL() B{1+0k { 6x/ X8zu return sSiteURL; 6nGDoW# } E4y"$U%. ! 2Y,
a l/rhA6kEU public void setSSiteURL(String value) gYzKUX@ { R?|_`@@A sSiteURL = value; N}FG%a } !FpMO`m 4
<]QMA0 e$>5GM public String getSFilePath() }>frK#S { \wDOE(> return sFilePath; nI_Zk.R } p-KuCobz] 29Q5s$YD@ R#\8jv v public void setSFilePath(String value) n{'
[[2U { }.b[a z\T sFilePath = value; H V } Y@.JW i,yK&*>JJ $V~%$ public String getSFileName() Fx3VQ'%J { s.GhquFCrU return sFileName; '{oe}]., } Gh{k ~/B eEc;w# 5&9(d_#H public void setSFileName(String value) {8B\-LUR { J$WIF&*0@ sFileName = value; =$`DBLX } >2g CM ? ! 1uw F~l3?3ZV public int getNSplitter() ?ST}0F00} { [#R%jLEJ2 return nSplitter; 1@nR.v"$ } RXWjFv~/ \
I?;% x(=kh%\; public void setNSplitter(int nCount) ap6Vmp { dU&.gFw1 nSplitter = nCount; )E[5lD61 } n3|~X/I } ZXUe4@qfl l
E&hw 3mm`8!R /* 5W{>5.Arx) **Utility.java ~y|%D; */ A|>C3S package NetFox; q90S>c, NI^Y%N lMm-K%(2 public class Utility { &%*S MW4dPoa PZ ogN public Utility() 93!a { X
]a> .y\HQ^j Maa.>2v< } rL,)Tc|" YwF6/JA0^ //线程睡眠 v;RQVH;, public static void sleep(int nSecond) KqS2 { h?ia4t try{ +I Ze`M%n Thread.sleep(nSecond); -y\N 9 } eLC&f} catch(Exception e) <#s-hQ { O?2<rbx e.printStackTrace (); n7MS{` } Asn0&Ys4 } Gqia@>T4*N W?l .QQk //日志 vfbe=)}[ public static void log(String sMsg) K4F!?# { ~lF lv+,% System.err.println(sMsg); &
9]KkY= } t~a$|(
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h Ffxk] o&%c public static void log(int sMsg) k0YsAa#6V { hL3,/^;E , System.err.println(sMsg); 5{u6qc4FW } G4{qWa/ } 2?r8>#_* r2](~&i2 a:|4q /* U.)G#B **TestMethod.java !}PFi T^ */ GY",AL8f package NetFox; kIfb! \G= E%aK dI 5sqM: public class TestMethod { /-hF<oNQ /SUV'J) nM; G;
T public TestMethod() 28)TXRr- { ///xx/weblogic60b2_win.exe b"Mq7&cf try{ #VOjnc/rW SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); (wlsn6h //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); wrO>#`Z SiteFileFetch fileFetch = new SiteFileFetch(bean); vW{cBy fileFetch.start(); tT8jC:oVa } .#:,j1L"53 catch(Exception e){e.printStackTrace ();} L~oFW'
y{{EC# n>E*g|a } R_qo]WvR; ,SyUr/D !U#++Zig% public static void main(String[] args) x7@WWFF> { r~}}o o4K new TestMethod(); )*A,L% } '<0q"juXE } q%k+x) 点击下载更多相关资料
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