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/* lq`7$7-4 **SiteFileFetch.java RCK* ?\m5 */ )M[FPJP} package NetFox; 3w[uc ~f import java.io.*; |@R/JGB^ import java.net.*; &lzCRRnvt tN.BI1nB ]PL\;[b> public class SiteFileFetch extends Thread { U%VFr# ab)ckRC r,vSDHb`j SiteInfoBean siteInfoBean = null; //文件信息Bean F60m]NUM)c long[] nStartPos; //开始位置 KqaEHL long[] nEndPos; //结束位置 }PDtx:T- FileSplitterFetch[] fileSplitterFetch; //子线程对象 AtAu$"ue long nFileLength; //文件长度 L-q)48+^k boolean bFirst = true; //是否第一次取文件 %){/O}I]> boolean bStop = false; //停止标志 ?G&J_L=@Y File tmpFile; //文件下载的临时信息 Dp^=% F{t DataOutputStream output; //输出到文件的输出流 ~:_10g]r TDg<&ND3 //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) XC/M:2$ public SiteFileFetch(SiteInfoBean bean) throws IOException 6B>*v`T: { <FZ*'F*M siteInfoBean = bean; OMYbCy^ //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); NW21{}=4 tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); )B~{G\jS if(tmpFile.exists ()) f|s,%AU"i { ^QHgc_oDm bFirst = false; pMUUF5 read_nPos(); y=SpIbn{ } pm= s else UK@hnQU8` { yB;K|MXy? nStartPos = new long[bean.getNSplitter()]; =3;!
5P nEndPos = new long[bean.getNSplitter()]; `VglE?M } vsI|HxpyC, 4Xn-L&0z oVfRp.a ({C|(v9C7 } iy_3#x5> D42!# |*]<*qnZt public void run() f=4q]y#& X { 6"+bCx0: //获得文件长度 Zjc0R //分割文件 #.OCoc //实例FileSplitterFetch "88<{x L //启动FileSplitterFetch线程 _XI,z0( //等待子线程返回
2&o3OKt try{ jgYe\dinM if(bFirst) F22]4DLHO { H}1XK|K3#H nFileLength = getFileSize(); "#%9dWy if(nFileLength == -1) k>\s6 { WO+>W+|N System.err.println("File Length is not known!"); (|y@ftr@ } }~<9*M-P else if(nFileLength == -2) nqcD#HUv { Et)j6xz/F System.err.println("File is not access!"); reoCyP\!! } 7V~
gqum else
?U~`'^@ { lOIf4 for(int i=0;i<nStartPos.length;i++) -li;w
tCS { hN;$'%^ nStartPos = (long)(i*(nFileLength/nStartPos.length)); Thp!X/2O` } >-CNHb for(int i=0;i<nEndPos.length-1;i++) +/#Lm#*nu% { $1D>}5Ex nEndPos = nStartPos[i+1]; ;|Rrtf9 } ?SoRi</1 nEndPos[nEndPos.length-1] = nFileLength; $*+UX
} 6bbzgULl } [Ue"#w p,OB;Ncf/ PV/ hnVUl //启动子线程 ,L(q/#p fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; +C=^,B!, for(int i=0;i<nStartPos.length;i++) 1-pxM~Y { tW3Nry fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), ~ \7peH% siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), zids2/_* nStartPos,nEndPos,i); U {sT %G Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); =l}XKl-> fileSplitterFetch.start(); (n@&M!a } FWpb5jc)3 // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), 6
&MATMR siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); W
-5wjc // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", X]Ma:1+ nEndPos = " + nFileLength); ItQ3|-^ // fileSplitterFetch[nPos.length-1].start(); B%Z ,Xjq G5zsId
dS FS6ZPjG) //等待子线程结束 hKQg:30< //int count = 0; *Cx3bg*Gan //是否结束while循环 tWI4x3&2 boolean breakWhile = false; Uv=hxV[7y |-vn,zpe (d=knoo7A
while(!bStop) 1Qo2Z;h@ { R94ID@LF write_nPos(); uhr&P4EW Utility.sleep(500); t|k-Bh:x breakWhile = true; rqi|8gKY !
d " i P%kJq^& for(int i=0;i<nStartPos.length;i++) 7|pF(sb0 { P&8QKX3
j^ if(!fileSplitterFetch.bDownOver) #,\qjY { 4-\gha breakWhile = false; vsCy? break; @:G#[>nKe } L ]Dl}z } soB5sFt&] if(breakWhile) 9uA2M!~i2 break; sQr
|3}I( 4.i< `' #p|7\Y //count++; 3Qoa?* //if(count>4) *bTR0U // siteStop(); tCP;IU$ } p?4h2`P +Zo&c} H7R6Ljd?&S System.err.println("文件下载结束!"); p#fV|2'
} K6;
s xF catch(Exception e){e.printStackTrace ();} Ni)/L(
& } g{$F;qbkO G'
a{;3 tGh!5EZ6` //获得文件长度 HCVMqG! public long getFileSize() I'T@}{h { @G>Q(a*, int nFileLength = -1; " ll
TVB try{ r4FGz!U URL url = new URL(siteInfoBean.getSSiteURL()); Umt?COc HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); 4?cIn4} httpConnection.setRequestProperty("User-Agent","NetFox"); bG[)r N\WEp?%~ j?cE0
hz int responseCode=httpConnection.getResponseCode(); |c5r&oM&m if(responseCode>=400) ;bxL$1 { 8X2NEVH] processErrorCode(responseCode); _^"0"<, return -2; //-2 represent access is error -H(\[{3{V } K#<cuHGC Ju 0 lQnqPQY String sHeader; u'Ua ++a\ &KZr`"cT# s.uV,E*wu for(int i=1;;i++) dAj;g9N/h { C@Fk //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); 0]^ke:(# //Utility.log(in.readLine()); ~^pV>>LX| sHeader=httpConnection.getHeaderFieldKey(i); ;p4|M if(sHeader!=null) ZpTT9{PT=: { F8%.-.l) if(sHeader.equals("Content-Length")) 2W 9N-t21 { fu6Ir, nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); tHV81F1J break; b63 tjqk } 5t&;>-A'?' } Rr/sxR|0_ else MehMhHY break; wnoL<p } V:vYS } UL
catch(IOException e){e.printStackTrace ();} :#=XT9 catch(Exception e){e.printStackTrace ();} h1`u-tc2x uzpW0(_i3a QCvz| ) Utility.log(nFileLength); )cd5iE:FO JVgV,4 1 MTxe5ob`$Q return nFileLength; y.'5*08S0 } %qf ?_2v W8R"X~!V +)eI8o0# //保存下载信息(文件指针位置) P,/=c(5\} private void write_nPos() )FnJLd { Y^~Dr|5% try{ 20XN5dTFT output = new DataOutputStream(new FileOutputStream(tmpFile)); Z_qOQ%l output.writeInt(nStartPos.length); }b5If7 for(int i=0;i<nStartPos.length;i++) OLS. 0UEc { [Q5>4WY // output.writeLong(nPos); tEXY>= output.writeLong(fileSplitterFetch.nStartPos); Ckc4U. t| output.writeLong(fileSplitterFetch.nEndPos); FV->226o% } #nOS7Q#uW output.close(); }pzUHl> } =5jng. catch(IOException e){e.printStackTrace ();} ?UGA-^E1 catch(Exception e){e.printStackTrace ();} (dh{Gk4=+ } {!`0i 3h-C&C '*6S0zt //读取保存的下载信息(文件指针位置) !jeoB private void read_nPos() !^:)zORYR { E 9LKVs} try{ D[5Qd)PIL DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); wgb
e7-{ int nCount = input.readInt(); [aF^ D;o nStartPos = new long[nCount]; mDT"%I"4j nEndPos = new long[nCount]; <:rbK9MIl for(int i=0;i<nStartPos.length;i++) X!vBD { ^+m6lsuA nStartPos = input.readLong(); 1>BY:xZr nEndPos = input.readLong(); 0$~zeG" } S?k G|y input.close(); G(~
s(r{%I } L93&.d@m9 catch(IOException e){e.printStackTrace ();} muc>4!Q catch(Exception e){e.printStackTrace ();} 6pHn%yE* } ~RRp5x _ g]hTz)8fF Xj^Hy"HC^~ private void processErrorCode(int nErrorCode) vCB0x:/ { Y%B:IeF} System.err.println("Error Code : " + nErrorCode); n7r )wy } bvK fxAih d 18>0R };z[x2l^ //停止文件下载 &u@<0 1= public void siteStop() o'8`>rb { TNHkHR[& bStop = true; #:yh2y7a% for(int i=0;i<nStartPos.length;i++) X?'v FC fileSplitterFetch.splitterStop(); (rM-~h6g }?0At<(d tTzPT< } PSM~10l, } CSC
sJE#4 //负责部分文件的抓取 *}hx9:9\B **FileSplitterFetch.java 9 ^G.]W] */ iIe\m V package NetFox; $T)EJe rk$$gXg9/ $i^#KZ}-WK import java.io.*; 2th>+M~A import java.net.*; /R2K3E# EO<{Bj=2 NZ}DbA+g;| public class FileSplitterFetch extends Thread { =%O@%v sSM^net0 m|}};8 String sURL; //File URL :UMtknV long nStartPos; //File Snippet Start Position oY#62&wk4 long nEndPos; //File Snippet End Position M+mO4q6 int nThreadID; //Thread's ID d'4^c,d boolean bDownOver = false; //Downing is over ^"g # ! boolean bStop = false; //Stop identical ]W-7 U_ FileAccessI fileAccessI = null; //File Access interface uTemAIp
$u <)vjoRv ]%RX\~Q.4 public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException K|n$-WDG} { UY)e6 Zd this.sURL = sURL; 9&>)4HNd? this.nStartPos = nStart; ^,?dk![1Cv this.nEndPos = nEnd; uEK9 nThreadID = id; eq|G\XJ fileAccessI = new FileAccessI(sName,nStartPos);//定位 /ynvQ1#uA } >8pmClVvmR $<y10DfO A1mxM5N public void run() )@X
`B d { Vz"Ja while(nStartPos < nEndPos && !bStop) K,VN?t<h { ww_gG5Fc$ w4S0aR:yL 0nh;0Z try{ UJqDZIvC URL url = new URL(sURL); NaR/IsN8% HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); 8op,;Z7Y httpConnection.setRequestProperty("User-Agent","NetFox"); 3M;[.b String sProperty = "bytes="+nStartPos+"-"; FXHcy:)}G httpConnection.setRequestProperty("RANGE",sProperty); {Q&@vbw' Utility.log(sProperty); ,r&:C48dI Eagl7'x "I)*W8wTn InputStream input = httpConnection.getInputStream(); dKOW5\H' //logResponseHead(httpConnection); dW32O2@- /GzA89N( (Hr_gkGtM byte[] b = new byte[1024]; |Ew~3-u! int nRead; ^*
xhbM; while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) I$#B#w?!$r { YPjjSi:# nStartPos += fileAccessI.write(b,0,nRead); C&&*6E5 //if(nThreadID == 1) $yZ(c#L // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); ;W/K7} } \Bg;^6U ),G?f {`! 5pOb;ry")` Utility.log("Thread " + nThreadID + " is over!"); muAI$IRR bDownOver = true; 'w'PrM,: //nPos = fileAccessI.write (b,0,nRead); ( 5^bU< } 6vx0F?>_ catch(Exception e){e.printStackTrace ();} Hcp)Q76X } F~NmLm } A,tmy',d" d!V;\w >O{U4_j@( //打印回应的头信息 ^!={=No] public void logResponseHead(HttpURLConnection con)
H%!ED1zpA { m.F \Mn for(int i=1;;i++) ZB+N[VJs) { ST#OO! String header=con.getHeaderFieldKey(i); (XQBBt if(header!=null) [hLSK-K 9 //responseHeaders.put(header,httpConnection.getHeaderField(header)); )zFPf]gz Utility.log(header+" : "+con.getHeaderField(header)); &8l"Dl else n/
\{}9 break; ,qx;kJJ } B,@<60u } _TB,2 R ;*3OkNxa3 l5> H\ public void splitterStop() JGJXV3AT { =F(fum;zH bStop = true; tWs ]Zd } tD G[}j
H %Cb 4CzT<cp } E3pnu.;U:_ mfYY?]A*+ (<= e? /* .RI{\ i` **FileAccess.java j k%MP6 *//文件访问(定位,写) j{.P'5e@pZ package NetFox; $VWeo#b import java.io.*; J>I.|@W4 j}0W|* YLr<^G-v public class FileAccessI implements Serializable{ aV^wTs#2I 8Z=d+}Gg< //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 //SH=>w2 RandomAccessFile oSavedFile; x@-bY long nPos; aoLYw 9 g4NxNjM; }U)g<Kzh public FileAccessI() throws IOException >L\>Th{o { EcBJ-j6d this("",0); _[yBwh } (+@
Lnz\ ^E)Kse.> &P+7Um( public FileAccessI(String sName,long nPos) throws IOException E%R^
kqqr { >~;MQDU5*Y oSavedFile = new RandomAccessFile(sName,"rw"); <<43'N+ this.nPos = nPos; nqG9$!k^t oSavedFile.seek(nPos); C'HW`rh.^ } C%s+o0b uF xrv
:Hk:Goo2 public synchronized int write(byte[] b,int nStart,int nLen) /H_,1Fu| { ~16QdwK int n = -1; 0K\Xxo.= try{ orGNza"A oSavedFile.write(b,nStart,nLen); 6$1dd# n = nLen;
ohK_~ } >^cP]gGY catch(IOException e) 'baew8Q# { \q2#ef@2 e.printStackTrace (); CNC3">Dk~9 } {-(}p+;z +*dG'U6 MXSN
< return n; }gk37_}X\I } 3Un{Q~6h d$>TC(E=t YCJ6an } rJ
LlDKP-( }GIwYh/ zEG6T * /* `>M-J-J **SiteInfoBean.java m).S0 */ (=v :@\r package NetFox; `
u# ' p0 @,- tb^8jC public class SiteInfoBean { Nm{\?
. ZuRH_pI cC{eu[ XW private String sSiteURL; //Site's URL Ls8@@b,t2 private String sFilePath; //Saved File's Path )ZxDfRjL private String sFileName; //Saved File's Name Xb0$BAP private int nSplitter; //Count of Splited Downloading File nz72w_ hE|Z~5\Y,> p.{M s n public SiteInfoBean() {H]xA 3[] {//nSplitter的缺省值为5 h28")c.pH= //default value of nSplitter is 5 gyqM&5b this("","","",5); rToZN!q\S } kA`Z#yu /.Yf&2X\ gB4&pPN public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) iV
h^; { #fq%903=
sSiteURL= sURL; ?hpT"N,hF9 sFilePath = sPath; \#LkzN8 sFileName = sName; yc4?'k! this.nSplitter = nSpiltter; -__RFxG 9`83cL >FO4] } 3\x@G)1 `Gct_6 Lk?%B)z public String getSSiteURL() sVk+E'q { qPh
@Bl3 return sSiteURL; A1b</2 } qJjXN+/D G?:{9. ( Yt]tRqrh;T public void setSSiteURL(String value) BMubN { N_dHPa sSiteURL = value; uvNLm]* } XRZj+muTZ 1&zvf4 cT2&nZ public String getSFilePath() ^?pf.E!F` { ;[-OMGr]# return sFilePath; <evvNSE } {WBe(dc_% {FYWQ!L
;E Z5/"T public void setSFilePath(String value) 9YpgzCx
Z { N$\'X<{ sFilePath = value; eWKFs)C] } 2nNBX2o&_ glMYEGz6p jZjWz1+ public String getSFileName() o!R.QI^2VT { r]e1a\)r return sFileName; B3x 4sKs } t=,ZR}M1` baLO~C [NG~FwpRf public void setSFileName(String value) L<t>o":o { n$2IaE;v sFileName = value; u/wWP4'$J@ } Hrjry$t/J &cZQ,o ,;3bPjey public int getNSplitter() Ck:RlF[6C { 2TFb!?/RQ return nSplitter; #&V7CYJ } '}4z=f`} mS\gh)<h LtIR)EtB] public void setNSplitter(int nCount) D4@).% { r 6.`9 nSplitter = nCount;
H7`JqS } [Lck55V+Q } xq6
eu
9 d#-scv}s5 ~]sj.>P /* nt 9LBea **Utility.java zd%n)jlwR */ :B^YK]. package NetFox; X;e=d+pw _f5>r (1Q 7aF'E1e'3 public class Utility { Tu!2lHK; 6o5NeKZ +9^V9]{Vo public Utility() Vy.gr4Cm { EZ,Tc;f= 'CQ~ZV5 iXoEdt) } yH=Hrz:<eM q8m{zSr //线程睡眠 WGmXq. public static void sleep(int nSecond) (vR9vOpJ { F"-u8in` try{ FTF`-}Hz Thread.sleep(nSecond); {[|je]3v } g~7x+cu0 catch(Exception e) ftb .CPWI { T!f+H?6 e.printStackTrace (); VyMFALSe]h } xK*G'3Ge } D(;jv= "/ X-,mNvz //日志 \m xi8Z
w public static void log(String sMsg)
<<FBT`Y[ { {"dvU"y)\ System.err.println(sMsg); B*OEG*t } lXT+OJF >z'T"R/ [Qw BSq8) public static void log(int sMsg) <`Xt?K { ^P!(*k#T System.err.println(sMsg); JT,[; } V}Ok>6(~ } |e QwI& KgH_-REN ^)nIf)9}7 /* *'-[J 2 **TestMethod.java We`6# \Z X */ YigDrW package NetFox; E%b*MU wbpz, W>_K+:t public class TestMethod { 9#>t% IF~ MaS-*;BY, 6"oG
bte public TestMethod() SG4)kQ { ///xx/weblogic60b2_win.exe ?wi^R:2|j try{ )MWbZAI SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); (rieg F //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); qNuBK6E#4 SiteFileFetch fileFetch = new SiteFileFetch(bean); @e#{Sm fileFetch.start(); I&J> } #?h-<KQQ catch(Exception e){e.printStackTrace ();} S'_2o?fs TpGnSD 6/dP)"a(' } q/h, jM 3j6Am{9 ?mp}_x#= public static void main(String[] args) :|HCUZ*H(T { ==Ah& ){4^ new TestMethod(); t"$#KP< } ;%Zu[G`C } Z#t}yC%^d 点击下载更多相关资料
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