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/* ]v6s](CE **SiteFileFetch.java <oP"kh<D4 */ 3El5g0'G package NetFox; T>\r}p import java.io.*; _8eN^oc% import java.net.*; 'vV|un(6 0b~{l; [23F0-p public class SiteFileFetch extends Thread { 4kqgZtg. #k*P/I~ $yY\[C SiteInfoBean siteInfoBean = null; //文件信息Bean 'hn=X7 long[] nStartPos; //开始位置 bQelU long[] nEndPos; //结束位置 X!/o7< FileSplitterFetch[] fileSplitterFetch; //子线程对象 G"&yE.E5 long nFileLength; //文件长度 `SH#t3
5, boolean bFirst = true; //是否第一次取文件 rW<sQ0 boolean bStop = false; //停止标志 :*0l*j File tmpFile; //文件下载的临时信息 7B|
#*IZe DataOutputStream output; //输出到文件的输出流 U6M3,"? z0Bw+&^]} //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) ]x<`( public SiteFileFetch(SiteInfoBean bean) throws IOException B^C!UWN>%X { X5`#da siteInfoBean = bean; ?}D|]i34 //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); 2&Hn%q) tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); knU=# if(tmpFile.exists ()) X'W8 mqk { \gE6KE<?p bFirst = false; A0>u9Bn"Qw read_nPos();
S_EN,2'e } 9=wt9` ? else %/r}_V(UN { /y~ "n4CK~ nStartPos = new long[bean.getNSplitter()]; PpF"n[j nEndPos = new long[bean.getNSplitter()]; Mw,7+ } _Uxt9 X
{Hp*BE
Oi~]~+2 E)h&<{% } vUa&9Y TDtS^(2A7K i& ,Wg8#R public void run() 3TS(il9A { xct{Tv[FO //获得文件长度 ]*M-8_D //分割文件 Hi{1C"% //实例FileSplitterFetch ![OKmy //启动FileSplitterFetch线程 SK@%r //等待子线程返回 ee0)%hc1t try{ I2R"
Y< if(bFirst) hCcAAF*I;5 { jhN]1t/\X nFileLength = getFileSize(); `?H yDny if(nFileLength == -1) 5[py{Gq { p[zKc2 TPk System.err.println("File Length is not known!"); v[O }~E7' } 9
Z5!3 else if(nFileLength == -2) PqOPRf { tf5h/: System.err.println("File is not access!"); G; *jL4 } N5SePA\ ,? else T|{1,wP { &H`A S6 for(int i=0;i<nStartPos.length;i++) R2 I
7d'|v { %%dQIlF
nStartPos = (long)(i*(nFileLength/nStartPos.length)); ~_ 8X%uty } *QIlh""6 for(int i=0;i<nEndPos.length-1;i++) b,8\i|*!f { k[`9RGT nEndPos = nStartPos[i+1]; ?Bdhn{_ } )M!6y%b67 nEndPos[nEndPos.length-1] = nFileLength; M'n2 j } _=wu>h&7 } yyj?hR@rZ _shoh DLWG0$#! //启动子线程 i Sm
.E fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; O_M2Axm for(int i=0;i<nStartPos.length;i++) +p%!G1Yz { h
"MiD fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), ;!ICLkc$ siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), 7H+IW4Ma nStartPos,nEndPos,i); KXQ &u{[< Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); 'nrXRDb fileSplitterFetch.start(); N}j]S{j}' } 5 +Ei!E89 // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), ~^{jfHTlv siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); X4c|*U=4 // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", R-~ZvVw7L nEndPos = " + nFileLength); '\MYC8" // fileSplitterFetch[nPos.length-1].start(); $y0[AB|V Em%0C@C _{]\} =@ //等待子线程结束 nD8 Qeem@ //int count = 0; 4Pbuv6`RK //是否结束while循环 ;77#$H8) boolean breakWhile = false; <?Z [X{ Hd/|f; g[NmVY-o while(!bStop) s#8mD!T| {
$:7T write_nPos(); '@ $L}C#OI Utility.sleep(500); BrHw02G breakWhile = true; Q|DVB 0bR)]"K e2~$=f- for(int i=0;i<nStartPos.length;i++) R;G"LT { 8l?mNapy if(!fileSplitterFetch.bDownOver) StuQ} { nRE(RbRe breakWhile = false; m=qEQy6#2u break; <r@w`G } u{6b>c|,X } !T'`L{Sj if(breakWhile) R/_bk7o]H break; ;*H@E(g x%hV5KW T4M"s;::1 //count++; XY_zFF //if(count>4) Z7="on4 // siteStop(); JB
<GV-l } 1(q&(p SJ4+s4!l
< nT;Rwz$3 System.err.println("文件下载结束!"); @X|Mguq5 } K&\
q6bU catch(Exception e){e.printStackTrace ();} RZ6[+Ygn } #[uDVCM '[Ue0r<jn dr[sSBTY" //获得文件长度 9GV1@'<Y] public long getFileSize() c)b/" { ,Vc>'4E- int nFileLength = -1; 9tMaOm try{ YUGEGXw URL url = new URL(siteInfoBean.getSSiteURL()); YV{^2)^ HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); G[bWjw86O httpConnection.setRequestProperty("User-Agent","NetFox"); ]RvFn~E!s x}tg/`.=z ev{;}2~V int responseCode=httpConnection.getResponseCode(); &c|3v! if(responseCode>=400) j6JK4{ { -K@mjN processErrorCode(responseCode); F%]ZyO9 return -2; //-2 represent access is error C)a;zU;9 } B&M-em= AW R u alpm#GU String sHeader; &>xd6- M SnRx*- }g9g]\.!a for(int i=1;;i++) #H5i$ o { }#<mK3MBe //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); ?=dp]E{ //Utility.log(in.readLine()); Rt9S sHeader=httpConnection.getHeaderFieldKey(i); `q$a
p$? if(sHeader!=null) *M]@}'N { JG:li} N if(sHeader.equals("Content-Length")) O u-/dE% { HPus/#j'+ nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); l(<=JUO; break; n$u@v(I } =>LQW;Sjz } J6C/`)+w else ;S5J"1)O~ break; nkxv,_)ZT } 11g_!X -g@ } KB$SB25m catch(IOException e){e.printStackTrace ();} "T4buTXJ catch(Exception e){e.printStackTrace ();} 0|=,!sY _pN:p7l( N fBH Utility.log(nFileLength); }HKt{k&$ ^D5+S`V 5@-[[ $dk return nFileLength; xo.k:F } GD-cP5$ !SPu9: TCL XO0 //保存下载信息(文件指针位置) WcOnv'l, private void write_nPos() Klj -dz { 7@NV|Idtd try{ &~K4I output = new DataOutputStream(new FileOutputStream(tmpFile)); >|1$Pv? output.writeInt(nStartPos.length); ]/6i#fTw for(int i=0;i<nStartPos.length;i++) 4Nl3"@<$ { kc7,F2=F // output.writeLong(nPos); Iy#=Nq= output.writeLong(fileSplitterFetch.nStartPos); o FS2*u output.writeLong(fileSplitterFetch.nEndPos); L&,&SDr } )jPIBzMys output.close(); 9-"!v0[' } $}8@?>-w catch(IOException e){e.printStackTrace ();} xS+!/pBf"Y catch(Exception e){e.printStackTrace ();} k~XDwmt; } %
4Gt^:J" :LxsiDrF[ wM1&_%N //读取保存的下载信息(文件指针位置) 1'YUK"i private void read_nPos() .2{*>Dzi { `V2doV) try{ ufn%sA DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); vI20G89E int nCount = input.readInt(); {WvYb, nStartPos = new long[nCount]; ;Xl {m`E+ nEndPos = new long[nCount]; ,v#O{ma for(int i=0;i<nStartPos.length;i++) cb5T-'hY
{ Sfa;;7W@R nStartPos = input.readLong(); u10;qYfL8o nEndPos = input.readLong(); Tvl"KVGm } vyvb-oz;u input.close(); 0WSOA[R%[b } G Ml JM catch(IOException e){e.printStackTrace ();} &>xz catch(Exception e){e.printStackTrace ();} qH4+iSTnV } ^6QzaC3 va2FgW`Bd+ +Kp8X53 private void processErrorCode(int nErrorCode) ~~3*o { 6F_:,b^ System.err.println("Error Code : " + nErrorCode); pnTz.)'46 } (tCBbPW6T? /V }Z,'+ '<U4D //停止文件下载 v,!`A!{D public void siteStop() [D"5@ { CT/>x3o bStop = true; ct@3] for(int i=0;i<nStartPos.length;i++) VA@ fileSplitterFetch.splitterStop(); #y
f 88VI
_< Pa'N)s< } zeD=-3 } AquO#A[,# //负责部分文件的抓取 Gi\Z"MiBZ **FileSplitterFetch.java 0|kH0c,T- */ =&^tfD package NetFox; L]q%;u]8! NNMn,J `{NbMc\
] import java.io.*; n}C0gt- import java.net.*;
Wf~PP; Ya}}a uR.`8s| public class FileSplitterFetch extends Thread { .O SQ8W} -EE}HUP) p)?6~\F: String sURL; //File URL ,/"0tP&_; long nStartPos; //File Snippet Start Position *xN?5u% long nEndPos; //File Snippet End Position :o:Z int nThreadID; //Thread's ID :jJ0 +Q boolean bDownOver = false; //Downing is over Z4g<Ys* boolean bStop = false; //Stop identical >`<qa!9 FileAccessI fileAccessI = null; //File Access interface =
toU?:. `O!yt TAq[g|N-; public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException wScr:o+K>L { -"I9` this.sURL = sURL; -XnOj2 this.nStartPos = nStart; 5lyHg{iqD this.nEndPos = nEnd; >3}N; nThreadID = id; l5D4?`| fileAccessI = new FileAccessI(sName,nStartPos);//定位 6Ilj7m* } PAH#yM2Ic n] t3d 6n;? :./ public void run() :\C/mT3xL) { gGx<k3W^ while(nStartPos < nEndPos && !bStop) 30<_` { Gzwb<e
y `|PhXr 7X>*B~(R try{ ],{M``]q URL url = new URL(sURL); 79I"F' HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); AmQsay#I_ httpConnection.setRequestProperty("User-Agent","NetFox"); t>x!CNb'C String sProperty = "bytes="+nStartPos+"-"; ,!X:wY}dW httpConnection.setRequestProperty("RANGE",sProperty); 5H, (\Xd Utility.log(sProperty); E(&zH;?_ "'XYW\bI a-AA$U9hj InputStream input = httpConnection.getInputStream(); ~6+Um_A_L //logResponseHead(httpConnection); u$X =2u:P JSx[V<7m q29d= byte[] b = new byte[1024]; Cq3Au%7 int nRead; @Fzw_qr
M while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) r?dkE=B { rV2>;FG nStartPos += fileAccessI.write(b,0,nRead); F5OQM?J //if(nThreadID == 1) T!Lv%i*|Y // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); L">m2/ HG } C
=B a|Z [{#n?BT T5}5uk9 Utility.log("Thread " + nThreadID + " is over!"); +n)bWB% bDownOver = true; bJkFCI/ //nPos = fileAccessI.write (b,0,nRead); b@sq}8YD|z } GaV OMT catch(Exception e){e.printStackTrace ();} ?}S!8;d } -y[y.#o } |tz{Es<`B <p +7,aE_ Mc,p]{<<AV //打印回应的头信息 Xn5LrLM& public void logResponseHead(HttpURLConnection con) #a'CoJs
{ 9*Fc+/ for(int i=1;;i++) dj}P|v/;z { uKB V`I String header=con.getHeaderFieldKey(i); 85Kf>z::c if(header!=null) lE*.9T //responseHeaders.put(header,httpConnection.getHeaderField(header)); )}vUYTU1 Utility.log(header+" : "+con.getHeaderField(header)); ey\(*Tu9 else ?%/*F<UVQ break; T+FlN-iy) } 23opaX5V= } =/4}!B/ +eop4 |Z :U]Pm:ivTU public void splitterStop() W9bpKmc { q^~w:$^U bStop = true; a)6?:nY$ } C\|HN=2eh z ^y -A? =,&{ &m) } L:jv%;DM kq(]7jU$[
Bm a.Uln /* ZJ[p7XP **FileAccess.java #jg3Ku;Y *//文件访问(定位,写) HDz"i package NetFox; `[x'EJp# import java.io.*; zCu+Oi6 [kPl7[OL _cJ\A0h^ public class FileAccessI implements Serializable{ (D\`:1g 59?$9}ob //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 8P2_/)| RandomAccessFile oSavedFile; -or)NE
long nPos; j3>&Su>H4 0iz\<'
p 8{Vt8>4 public FileAccessI() throws IOException e C&!yY2g { SWNT}{x] this("",0); \x"BgLSE } YCyh+%Q( |;YDRI cOP%R_ak? public FileAccessI(String sName,long nPos) throws IOException e^hI[LbNC { ,LL=b-Es oSavedFile = new RandomAccessFile(sName,"rw"); w}x&wWM this.nPos = nPos; ]YB,K)WQ oSavedFile.seek(nPos); @rr\Jf""z } i\RB KF 2JHV*/Q Qr~yHFc1y public synchronized int write(byte[] b,int nStart,int nLen) rwAycW7 { 5"Y:^_8 int n = -1; ?6:e%YT try{ EsLtC5] oSavedFile.write(b,nStart,nLen); @EH@_EwYV n = nLen; =8DS~J{ } S#\Cyn2(t catch(IOException e) DWU(ld:_ { F4g3l e.printStackTrace (); f5.Be% } ,){WK|_ E|=]k qnw8#!%I return n; H`T}k+e2-N } x|3G}[= qvRs1yr?q
e:6mz\J } P)UpUMt;k CrX1qyR ABhQ7
x| /* ='HLA-uT **SiteInfoBean.java <J^94-[CF */ R78lV-};Q package NetFox; QQUZneIDp 49 1 1 -M`+hVs? public class SiteInfoBean { qWI8 >my11 /Fp@j/50 |TuFx=~5v private String sSiteURL; //Site's URL R"e53 3 private String sFilePath; //Saved File's Path oF5~|&C private String sFileName; //Saved File's Name <GoZ> private int nSplitter; //Count of Splited Downloading File wmit>69S D}bCMN< ]U5/!e public SiteInfoBean() e:= +~F(f {//nSplitter的缺省值为5 E^V4O l< //default value of nSplitter is 5 :"Kr-Hm` this("","","",5); $`Aps7A } k)S'@>n{u O)}5`0@L ?,*KA Gg% public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) 9 H~OC8R: { [u/W h+ sSiteURL= sURL; l~GcD sFilePath = sPath; `HsI)RmX sFileName = sName; IL<@UWs6 this.nSplitter = nSpiltter; @%$<,$= <0H^2ekd uJL[m(G } }<G#bh6;Q (/Dr=D{ ` jftf]n&Z(q public String getSSiteURL() %ZJ;>a# { lNqF@eCT9 return sSiteURL; RL1cx| } Xh"8uJD EB[B0e7} J, vEZT<Mt public void setSSiteURL(String value) +:m' { !"N-To-c sSiteURL = value; NEX{vZkgw } @#&y ,$;pLjo6 u6~/"
_FwY public String getSFilePath() Y%)@)$sK { ffS]%qa return sFilePath; 5j-?Uf } ?DKwKt p*"H&xA@ Ra^GbT|Z public void setSFilePath(String value) by0M(h { Kv-4VWh sFilePath = value; =aE!y5 } ayoqitXD? m8<l2O=m h;2n2.Q public String getSFileName() TSAVXng { $&[}+?? return sFileName; UBvea(z-# } ;]xJC
j w-9fskd6e uGH>|V9'c public void setSFileName(String value) eNw9"X}g { 7Q3a0`Iq sFileName = value; \1b! I)T9 } bClMM ZF6?N?t}h8 $d_%7 xx public int getNSplitter() T`.RP&2/d { ]Sgc42hk return nSplitter; 0413K_ } Pf?y!dK< ts3BmfR? Auz.wes public void setNSplitter(int nCount) \5s#9 { dwAFJhgh nSplitter = nCount; U$5 lh } ^%pM$3ov } ^q=D!g 8Qt'Y9| :;(zA_- /* dJ}E,rW} **Utility.java ApxGrCu */ ow{Ss X package NetFox; u!VAAX ` kG}NJf 1^4z/<ZWm public class Utility { {2Jn#&Z29 5VG[FY6Pl 9OnH3 public Utility() v2uyn { <p74U( V SuU_psF
-0/5! } l].Gz`L oSOO5dk:z //线程睡眠 #gL$~.1 public static void sleep(int nSecond) "/&_B { wtY*{m2 try{ 9j;L- Thread.sleep(nSecond); |E YJbL;1% } x!08FL) catch(Exception e) RS>;$O_(M { A1A/OU<Vb e.printStackTrace (); Gw5j6
} $\
0d9^)& } !6UtwCVR 5D32d1A //日志 ktILKpHt" public static void log(String sMsg) dDAIfe2y {
1UHStR System.err.println(sMsg); u&!QP4$"z } v&NC` dVR Gqz<;y ,(6U3W*bu public static void log(int sMsg) w K_I" { %6vf~oG System.err.println(sMsg); 7eh<>X!TX } 1,tM } /"Bm1 'ow`ej ){PL6|5x /* \UdHN=A& **TestMethod.java 8e`'Ox_5a */ gRk%ObJGqm package NetFox; *<PQp G/2| *H 3=reN6Q public class TestMethod { 5w\>Whbd -gWqq7O meHnT9a^ public TestMethod() D ]H@Sx { ///xx/weblogic60b2_win.exe :Kl~hzVSOa try{ ~i4h.ZLj SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); FZW)C'j //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); G\y: O9( SiteFileFetch fileFetch = new SiteFileFetch(bean); ],lrT0_cT fileFetch.start(); ^r u1QDT } oJcDs-! catch(Exception e){e.printStackTrace ();} #bqc}h9 _Ra$"j Rn(vG-xQ } yEnurq%J t8Sblgq :|s!_G < public static void main(String[] args) >IL[eiiPG { \"]vSx> new TestMethod(); v&hQ;v } ZeUA e } U#I8Rd I, 点击下载更多相关资料
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