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/* $@xkKe" **SiteFileFetch.java E%'DIs */ 9D<HJ( package NetFox; <uvshZv import java.io.*; E%e-R6gl import java.net.*; B8&@Qc@~ okv7@8U#p ~!;3W!@(E public class SiteFileFetch extends Thread { zk]~cG5dT/ K?>&Mr l\5NuCgRY SiteInfoBean siteInfoBean = null; //文件信息Bean f[RnL#*xJU long[] nStartPos; //开始位置 <ZiO[dEV long[] nEndPos; //结束位置 h(L5MZs FileSplitterFetch[] fileSplitterFetch; //子线程对象 kel {9b=i long nFileLength; //文件长度 PEWzqZ|!; boolean bFirst = true; //是否第一次取文件 $Yka\tS' boolean bStop = false; //停止标志 87Kx7CKF" File tmpFile; //文件下载的临时信息 d
!H)voX DataOutputStream output; //输出到文件的输出流 :NLN xK twn@~$ //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) tFwlx3 public SiteFileFetch(SiteInfoBean bean) throws IOException \
C^D2Z6 { ka*UyW} siteInfoBean = bean; yV. P.Q //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); l0_V-|x tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); SS`C0&I@p if(tmpFile.exists ()) nAzr!$qbNv { by<2hLB9Q bFirst = false; (tgaH,G read_nPos(); hqBRh+[ } `+uXL9mo else |`nVr>QF& { h2>0#Vp3j nStartPos = new long[bean.getNSplitter()]; -&?- nEndPos = new long[bean.getNSplitter()]; - \QtE}|4 } `FwAlYJK krA))cP El%(je,| -}J8|gwwp } F\I^d]#,[ k-U/x"Pl &u8c!;y$b public void run() "DpQnhvbB { JF
gN //获得文件长度 | QA8"&r //分割文件 v4$,Vt:7 //实例FileSplitterFetch H/$q]i*#K //启动FileSplitterFetch线程 *v+ fkg //等待子线程返回 zYL^e @ try{ +[ zo2lBx if(bFirst) To`?<]8 { kQ8WO|bA nFileLength = getFileSize(); tpN}9N if(nFileLength == -1) UwU]l17~ { zMKL: Um" System.err.println("File Length is not known!"); (a?Ip)`I } oB9m\o7$ else if(nFileLength == -2) E` |qFG< { r.^&%D System.err.println("File is not access!"); A3_9MO
} yH^*Fp8V
else R 6Em^A/> { ui1m+ for(int i=0;i<nStartPos.length;i++) RHbwq] { w.f[) nStartPos = (long)(i*(nFileLength/nStartPos.length)); t3G'x1 } \4k*Zk for(int i=0;i<nEndPos.length-1;i++) wNZ7(W.U { In&vh9Lw nEndPos = nStartPos[i+1]; fsd>4t:"\ } .Q@"];wH nEndPos[nEndPos.length-1] = nFileLength; B*IDx`^Y } 6K}=K?3Z } ;^]A@WN6_ =HHg:" Ne
4*MwK //启动子线程
v%5(- fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; (#]KjpIK
for(int i=0;i<nStartPos.length;i++) 3)Y:c2 { <.ky1aex7 fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(),
Dfia=1A siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), Fev3CV$ nStartPos,nEndPos,i); T#7^6Ks+1 Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); Ks(U]G"V fileSplitterFetch.start(); S)yV51^B } ]||=<!^kn // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), 'QF>e siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); ]6 wi // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", !`lqWO_/
: nEndPos = " + nFileLength); ;kBies>V // fileSplitterFetch[nPos.length-1].start(); sA}R! e%6{P !$Z"\v'b //等待子线程结束 \<**SSN //int count = 0; m{c#cR //是否结束while循环 -::%9D}P| boolean breakWhile = false; CN(4;-so) sfE8b/Z8 HU9y{H while(!bStop) c ?XUb[ { .Er/t"Qs; write_nPos(); Z"X*FzFo Utility.sleep(500); 8
-A7 breakWhile = true; AW5g ( JxJ ntsn mC92J@m/L! for(int i=0;i<nStartPos.length;i++) PBtU4) { E e>j7k.G. if(!fileSplitterFetch.bDownOver) 2]=I'U<E! { 79H+~1Az breakWhile = false; (}1f]$V break; VAGMI+ - } 4tJ4X' U } _`>7
Q),7 if(breakWhile) rJp6d :M
break; <|3v@ /g'-*:a XWpnZFjE //count++; ^1=|(Z/ //if(count>4) GK?R76d // siteStop(); pIiED9 } vfJk?
( 4uAafQ`@H -oBas4J System.err.println("文件下载结束!"); yX3H&F6 } )O C[;>F7 catch(Exception e){e.printStackTrace ();} 3z92Gy5cr } y4We}/-< H^;S}<pxW U^BXCu1km //获得文件长度 z/k~+-6O public long getFileSize() &\|<3sd( { NP'Ke: int nFileLength = -1; g4a X try{ {))S<_yN URL url = new URL(siteInfoBean.getSSiteURL()); OG7v'vmY HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); w*%$
lhp! httpConnection.setRequestProperty("User-Agent","NetFox"); h\*rv5\M %L>nXj `)M\(_ int responseCode=httpConnection.getResponseCode(); iCRw}[[ if(responseCode>=400) '8kjTf#g<l { Sx9:$"3.X processErrorCode(responseCode); I{e^,oc return -2; //-2 represent access is error vr;Br-8 } w })Pedg xWz;5=7a] _ZM9
"<M-X String sHeader; "4uUI_E9F;
kjC{Zr XW_xNkpL5c for(int i=1;;i++) Tv,. { 9$V_=Bo //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); 9^#gVTGXv //Utility.log(in.readLine()); 0gD59N'C sHeader=httpConnection.getHeaderFieldKey(i); K6*UFO4}i if(sHeader!=null) vq:OH
H { i2a"J&,6O if(sHeader.equals("Content-Length")) J&ECm+2 { [2 w<F[ nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); ]q[ break; \*!%YTZ~ } 3J~kiy.nfW } 3hf;4Mb else ZHD0u)ri=J break;
Am%a4{b } 6Y_O^f } dN\P&"` catch(IOException e){e.printStackTrace ();} |+xtFe catch(Exception e){e.printStackTrace ();} ca3BJWY}J yb{{ z@ GHC?Tp Utility.log(nFileLength); (<R\ |5B,cB_ FWpN:|X BS return nFileLength; 4:e q{n } 1;kG[z=A l&??2VO/t K*U=;*p) //保存下载信息(文件指针位置) P[I*% private void write_nPos() d?&!y]RS# { =#Cf5s6qt try{ h3]@M$Y[ output = new DataOutputStream(new FileOutputStream(tmpFile)); Q@W|GOH3 output.writeInt(nStartPos.length); %f_OP$;fc for(int i=0;i<nStartPos.length;i++) UG"6RW @ { "ex~LB // output.writeLong(nPos); :7Z\3_D/ output.writeLong(fileSplitterFetch.nStartPos); opcR~tg@r output.writeLong(fileSplitterFetch.nEndPos); DPS1GO* } J={OOj output.close(); H")N_BB } /=YqjZTCq catch(IOException e){e.printStackTrace ();} B#k3"vk# catch(Exception e){e.printStackTrace ();} g\\1C2jG } HEB/\ mB^I@oZ* #S53u?JV8 //读取保存的下载信息(文件指针位置) 5} MlZp private void read_nPos() ELrZ8&5G { "gbnLKs try{ q?Ku}eID3 DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); UC+7-y, int nCount = input.readInt(); le^_6|ek nStartPos = new long[nCount]; x<*IF,o nEndPos = new long[nCount]; aEEz4,x_ for(int i=0;i<nStartPos.length;i++) uVq5fT`B { V3 _b! nStartPos = input.readLong(); Q3Z%a|3W nEndPos = input.readLong(); 9oje`Ay } #7~tL23}] input.close(); I*:qGr+ WJ } J|"nwY}a9 catch(IOException e){e.printStackTrace ();} x ?f0Hk+ catch(Exception e){e.printStackTrace ();} o[6vxTH } Q@e*$<3 /nY).lSH 4kaE}uKU private void processErrorCode(int nErrorCode) xOVA1pb, { o!s%h!%L System.err.println("Error Code : " + nErrorCode); $d2kHT } $h,&b<- xgtJl}L B%eDBu
") //停止文件下载 ^Cc8F3os= public void siteStop() k_K,J6_) { M$&WM{Pr^ bStop = true; |B%BwE for(int i=0;i<nStartPos.length;i++) zM_DE fileSplitterFetch.splitterStop(); x5fgF; rb *C-NutE J})$ } @~$F;M=.* } c_qcb7<~. //负责部分文件的抓取 --
i&" **FileSplitterFetch.java 9raHSzK@d */ q ab)
1ft package NetFox; VBbUl|X\ %="~\1y u>,lf\Fgz import java.io.*; XN~#gm#
import java.net.*; e0v9uQ%F5 dysX DOF?(:8Y public class FileSplitterFetch extends Thread { Z]x5! :kME FE8+E\ U? String sURL; //File URL ){O1&|z- long nStartPos; //File Snippet Start Position qE#&) long nEndPos; //File Snippet End Position qPXANx<^ int nThreadID; //Thread's ID zdLVxL>87 boolean bDownOver = false; //Downing is over Jw:Fj{D boolean bStop = false; //Stop identical ub`z7gL FileAccessI fileAccessI = null; //File Access interface .8T\Nr\~2 *Nvy+V k_*XJ <S!Y public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException CF3E]dt { Ynv9&P this.sURL = sURL; lFiq<3Nk this.nStartPos = nStart; 'GV&] this.nEndPos = nEnd; ER~T'-YMS nThreadID = id; \#\`!L[1 fileAccessI = new FileAccessI(sName,nStartPos);//定位 3AdP^B< } x1 ;rb8 &5kZ{,-eM gB/;clCdX) public void run()
&7L~PZ { /e.FY9 while(nStartPos < nEndPos && !bStop) ur/Oc24i1n { `"xk,fVYd \3t,|%v :k WZSN8.D try{ I;Al?&uw URL url = new URL(sURL); -@%t"8 HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); U9<_6Bsd httpConnection.setRequestProperty("User-Agent","NetFox"); _-@ZOhw& String sProperty = "bytes="+nStartPos+"-"; *C4~}4WT\ httpConnection.setRequestProperty("RANGE",sProperty); q?;N7P Utility.log(sProperty);
I6K7!+;2 -!XrwQyk 3
R5%N
~ InputStream input = httpConnection.getInputStream(); Ff[H>Lp~ //logResponseHead(httpConnection); u{g]gA8s ?JuX~{{.L ~8jThi
U byte[] b = new byte[1024]; **T:eI+ int nRead; /QrA8 while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) 'fS?xDs-v { Rz`@N`U nStartPos += fileAccessI.write(b,0,nRead); v\fzO#vj //if(nThreadID == 1) gXq!a|eH // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); q$MHCq; } @
\!KF*v H,(F1+~d 96vj)ql Utility.log("Thread " + nThreadID + " is over!"); qAUaF;{ bDownOver = true; ge^!F>whr //nPos = fileAccessI.write (b,0,nRead); h^%GE;N } @AvM catch(Exception e){e.printStackTrace ();} IM[54_I } AU0$A403 } Q8 -3RgAw ZvUp#8x(3 P-[fHCg~ //打印回应的头信息 (YAI,Xnw public void logResponseHead(HttpURLConnection con) +7Sf8tg\ { !c\7 for(int i=1;;i++) X"kXNKV/n { `ifb<T String header=con.getHeaderFieldKey(i); .KFA218h*x if(header!=null) ?O!]8k`1$ //responseHeaders.put(header,httpConnection.getHeaderField(header)); :L]-'\y Utility.log(header+" : "+con.getHeaderField(header)); G5!|y#T else B`LD7]ew break; 3|q2rA } &K06}[J } +*n]tlk USE [N ah 4kA LO public void splitterStop() P\.WXe#j { :[L{KFQU bStop = true; ~@xT]D!BQ } S2Zx &D/_ !)NYW4" Dz,uS nnm } ';_1rh Po!oN~r et@">D%;] /* '^hsH1 **FileAccess.java k - FB *//文件访问(定位,写) ,(6)ghr package NetFox; dI!8S import java.io.*; \$'R+k-57; :eSc; R_maNfS]Z public class FileAccessI implements Serializable{ <[bQo&B2 E K-Re"zsz //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 8098y,mQe RandomAccessFile oSavedFile; bi+9R-=& long nPos; KCE=|*6::| HB%K|&!+ QQ*gFP.Ao public FileAccessI() throws IOException 6j_ 678 { ol50d73B this("",0); :
-E, } wc"9A~ "";=DH J)_>%. public FileAccessI(String sName,long nPos) throws IOException wqcDAO( { 6Ux[,]GK oSavedFile = new RandomAccessFile(sName,"rw"); '[%jjUU this.nPos = nPos; 1bd$XnU oSavedFile.seek(nPos); dQ,Q+ON> } CdZnD#F2 i)=m7i X|,["Az
8 public synchronized int write(byte[] b,int nStart,int nLen) gglf\)E;}E { B4@fY int n = -1; >#INEO try{
x9h?e` oSavedFile.write(b,nStart,nLen); ;r3}g"D@ n = nLen; )Q~C4 C-j } 2H6:np|O catch(IOException e) \/n+j! { 7vw;Egd@@- e.printStackTrace (); ~)_K"h.DY } 2.ew^D# ^1R"7h Vu=] O/ =P return n; $_wo6/J5+D } {aoMJJq 0fA=_=A, B&
"RS } 04~}IbeJ u
>4ArtF >[EBpYi /* >G&^?5 **SiteInfoBean.java ;ed#+$Na */ w;~>k%}j package NetFox; r|<6Aae& r5[4h'f C\OECVT public class SiteInfoBean { pp<E))&R o OQ'*7_ ewpig4 private String sSiteURL; //Site's URL @cPflb private String sFilePath; //Saved File's Path Vu%n&uF private String sFileName; //Saved File's Name l~NEGb private int nSplitter; //Count of Splited Downloading File z"EWj73 5\xr?`VZ H$Kw=kMw public SiteInfoBean() C!5I?z& {//nSplitter的缺省值为5 P<vo;96JT //default value of nSplitter is 5 ##v`(#fu this("","","",5); 7LfcF } )(lJT&e <1K7@Tu 3-iD.IAUm@ public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) IytDvz*| { ?,>5[Ha^? sSiteURL= sURL; oPsK:GC`U sFilePath = sPath; NCn`}QP sFileName = sName; "H$@b`) this.nSplitter = nSpiltter; \ADLMj`F| <<sE`>) #jm@N7OZ } m<3w^mww x)_r@l`$ix NJm-%K public String getSSiteURL() ioWo ] { l~D\;F return sSiteURL; z+
ZG1\ } 85D? dgV ^&MK42,\ SB/3jH public void setSSiteURL(String value) n+rM"Gxz { 'BhwNuW\" sSiteURL = value; @D]lgq[ } yPN+W8}f "Vy WT Mb.4J2F ? public String getSFilePath() H{%H^t> { T
pD; return sFilePath; *{|$FQnR>( } oqYt/4^Q ceG&,a$\ A?r^V2+j public void setSFilePath(String value) 'g hys1H { NH4?q!'G sFilePath = value; SO_>c+Dw } s4bv;W 5z Kqb [,b)YjO~Xd public String getSFileName() QZ~0o7 { 03_pwB)^ return sFileName; mf9hFy*<4 } #kci=2q_ E30Z`$cz: iD714+N( public void setSFileName(String value) ]-bQNYKX { (;ADW+.`J sFileName = value; M)O[j}N } 6.19g'{sB 1qZG`Vz NO4Z"3Pd_ public int getNSplitter() S/7l/DFb { pV=@sz,G return nSplitter; 0>FE% } Y{+3}drJE *)D1!R<\,R jT-<IJh!o public void setNSplitter(int nCount) V{ |[oIp { o(fy d)t nSplitter = nCount; fEwifSp. } O aaH$B } D5L{T+}Oi% i*CnoQH 5\'AD^{ /* d.AC%&W **Utility.java :,~K]G */ E}YIWTX package NetFox; 9!#EwPD$# gr+Pl>C{ M*`hDdS public class Utility { c1#+Vse GHG,!C 6|#g+&[ public Utility() ) EXJ { ]0-<> vQHpf>o FmD +8= } %b?uW]j: th
2<o5 //线程睡眠 _ZyT3P& public static void sleep(int nSecond) u"Y]P*[k { Nfaf;;J} try{ [K:29N9~4 Thread.sleep(nSecond); vyU!+mlc } W.[BPR catch(Exception e) ArXl=s';s4 { ti2 e.printStackTrace (); V.VJcx } !*vBW/ } vD26;S.y[a X"<|Z]w //日志 {[^#h|U public static void log(String sMsg) ~kb{K; { PeNF+5s/K System.err.println(sMsg); _ECB^s_ } R=$Ls6z Qxq-Mpx{ h<NRE0- public static void log(int sMsg) <\aU"_D { ;?~
9hN! System.err.println(sMsg); '[0YIn } Pa&4)OD } u)~s4tP4 ab4LTF| !y*oF{RZ /* U^ ?=
0+ **TestMethod.java J?D\$u: */ 1;&T^Gdj package NetFox; nk/vGa4 D=&K&6rr ?,XC=} public class TestMethod { 9@y3IiZ"} 6+PGwCS W[|[;{ public TestMethod() 7' eh)[T { ///xx/weblogic60b2_win.exe u-.L^!k try{ '[fZt# SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); hQ';{5IKvC //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); $E.XOpl&I SiteFileFetch fileFetch = new SiteFileFetch(bean); SFpQ# fileFetch.start(); [ {cC } HJ@5B" catch(Exception e){e.printStackTrace ();} m
=k%,J_ F1c&0*_A =x
H~ww (D } 6N3@!xtpi *Hunp Y \ja `c)x public static void main(String[] args) GYoseqZM { .'lN4x new TestMethod(); &HL{LnLP@/ } oD0EOT/E } H[nz]s 点击下载更多相关资料
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