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/* Y]VLouzl **SiteFileFetch.java 3FY87R */ j[CXIz?c package NetFox; <c3Te$. import java.io.*; +R"Y~
m{F import java.net.*; L9{y1'') Y[!s:3\f CFXr=.yz public class SiteFileFetch extends Thread { B@k2lHks( 56o(gCj?y Q2qT[aD, SiteInfoBean siteInfoBean = null; //文件信息Bean *Za'^ Z2 long[] nStartPos; //开始位置 AcP d(Pc long[] nEndPos; //结束位置 ?k`UQi]Q FileSplitterFetch[] fileSplitterFetch; //子线程对象 'D'H)J long nFileLength; //文件长度 "O~7s} boolean bFirst = true; //是否第一次取文件 H7FOf[3' boolean bStop = false; //停止标志 9CG&MvF c File tmpFile; //文件下载的临时信息 ^u(-v/D9 DataOutputStream output; //输出到文件的输出流 v`hn9O [nA1WFfM //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) %0Ibi public SiteFileFetch(SiteInfoBean bean) throws IOException xL [3R
{ mor[AJ siteInfoBean = bean; p(>D5uN_}5 //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); s}q tM.^W tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); p~WX\; if(tmpFile.exists ()) "^Vnnb:Z*o { &6e A. bFirst = false; .;F%k,!v read_nPos(); zJ)`snN| } t|P+^SL else 6L"b O'_5K { !&},h= nStartPos = new long[bean.getNSplitter()]; ;;S9kNp^v nEndPos = new long[bean.getNSplitter()]; }Qa } H1c>3c ;Wgkf_3 MzMVs3w| & LhQr-g } %mAwK<MY` Q[Gs%/> (QTQxZ public void run() "[ieOFI { M1=eS@ //获得文件长度 {>UT'fa- //分割文件 3/y"kl:<- //实例FileSplitterFetch :28[k~.bo //启动FileSplitterFetch线程 f}EsS //等待子线程返回
RK/>5 try{ :}-VLp4b if(bFirst) OP|X- { IdoS6 nFileLength = getFileSize(); !5
?<QKOe if(nFileLength == -1) 3N?"s1U { iUbcvF3aP System.err.println("File Length is not known!"); iD.p KG } cx[[K. else if(nFileLength == -2) i0u`J { RdB,;Um9f System.err.println("File is not access!"); fI,2l
} `(r0+Qx else yU>ucuF { +~EnrrT+W for(int i=0;i<nStartPos.length;i++) ;6$W-W _ { uS JLIb nStartPos = (long)(i*(nFileLength/nStartPos.length)); =gC% = } WDI3* for(int i=0;i<nEndPos.length-1;i++) FqZD'Uu7 { v6H!.0 nEndPos = nStartPos[i+1]; XMzQ8|] } P{HR='2 nEndPos[nEndPos.length-1] = nFileLength; JkI|Ojmm/ } hcpe~spz9| } .pG`/[*a GL _hRu J|
1!4R~ //启动子线程 `YY07(% fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; FE1'MUT_ for(int i=0;i<nStartPos.length;i++) Y.q$"lm7k { cqaq~ fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), *^KEb")$ siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), <sn,X0W nStartPos,nEndPos,i); PZY6
I Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); X/buz fileSplitterFetch.start(); tkmzOc H } /]?e^akA // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), i|0!yID0@ siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); ju!V1ky // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", G.r=fNP nEndPos = " + nFileLength); 411z-aS // fileSplitterFetch[nPos.length-1].start(); ~R\ $Z MAp#1+k ..x2 //等待子线程结束 #7"";"{z| //int count = 0; J\FLIw4 //是否结束while循环 oBs5xH7@- boolean breakWhile = false; G^Y^)pc] a^Z=xlJ/uZ %!DTq`F while(!bStop) .@\(ay { ]f5vk write_nPos(); K+d{R=s^ Utility.sleep(500); (:^YfG~e breakWhile = true; {P3gMv; %_G '#Bn< sX]gL for(int i=0;i<nStartPos.length;i++) K"!U&`T { (1[Z#y[ if(!fileSplitterFetch.bDownOver) lR/Uboyy { XtE O ) breakWhile = false; {b-SK5%]L break; nkz<t } xVrLoAw } ]z2x`P^oI if(breakWhile) t~$8sG\ break; ^)o]hE| @V&HE:P *\_>=sS x; //count++; [ {HTGz@( //if(count>4) ;Aheeq746 // siteStop(); og_ylCh: } BjHp3-A' 8bf@<VTO_ b>9?gmR{ System.err.println("文件下载结束!"); 7q{yLcC" } dA<SVk*0Q catch(Exception e){e.printStackTrace ();} '@zMZc! } <tm= +jS<n13T DHbS=Iih //获得文件长度 n<F3&2w public long getFileSize() RjR+'<7E^ { E>:#{% int nFileLength = -1; f%JM
a]yV try{ =BbXSwv'( URL url = new URL(siteInfoBean.getSSiteURL()); xTqP`ljX HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); O]?\<&y httpConnection.setRequestProperty("User-Agent","NetFox"); 5k?xBk=< 8Q0/kG VCT1GsnE int responseCode=httpConnection.getResponseCode(); +U>Y.YP if(responseCode>=400) \w&R`;b8w { Iu(]i?Y processErrorCode(responseCode); ZXf&pqmG return -2; //-2 represent access is error lv~ga2>z } tv2k&\1
C+_UIx]A n]nJ$u1u String sHeader; )TBm?VMe y3bL\d1 +Y2D @K?) for(int i=1;;i++) \?|^w. { 0g
Hd{H= //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); Zqv //Utility.log(in.readLine()); yTNHM_P sHeader=httpConnection.getHeaderFieldKey(i); B,` `2\B if(sHeader!=null) N7GZ'-t^Er { \^!<Y\\ if(sHeader.equals("Content-Length")) 3Vk\iJ { -~*kAh nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); &i6JBZ#~, break; A<(Fn_&W } mR|']^!SE } "*S_w N% else XsSDz}dg break; fo<nk|i } TkIiO> } E 0OHl catch(IOException e){e.printStackTrace ();} -Vs;4-B{9 catch(Exception e){e.printStackTrace ();} =>&~p\Aw QyrB"_dm A+}O~,mxP8 Utility.log(nFileLength); o#D'"Tn! ,#9i=gp +i}uRO return nFileLength; IR&b2FTcU } 6BZi4:PDx L+mHeS l k4!p))ql //保存下载信息(文件指针位置) H`yUSB
IP private void write_nPos() '5A&c( { _bv9/# tR try{ V0*MY{x#S output = new DataOutputStream(new FileOutputStream(tmpFile)); KI].T+I output.writeInt(nStartPos.length); x]608I
T for(int i=0;i<nStartPos.length;i++) +:/.\3v71 { Zeq^dV5y77 // output.writeLong(nPos); \Hq=_}]F output.writeLong(fileSplitterFetch.nStartPos); A'D2uV output.writeLong(fileSplitterFetch.nEndPos); p
S| }
Xi~I<& output.close(); kX*.BZI}C } k9&W0$I# catch(IOException e){e.printStackTrace ();} ^rGuyW# catch(Exception e){e.printStackTrace ();} ];eJ'# } d"a\`# 9)n3f^,Oj* QVmJ_WT //读取保存的下载信息(文件指针位置) %fXgV\xY private void read_nPos() R <&U]%FD { 	HV try{ ]6MXG% DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); DZ:$p. int nCount = input.readInt(); =(bTS n nStartPos = new long[nCount]; \_)mWK,h nEndPos = new long[nCount]; m6@;!*Y for(int i=0;i<nStartPos.length;i++) \ >#y*W< { <W^>:!?w nStartPos = input.readLong(); ^e80S^ nEndPos = input.readLong(); j#l1KO^y } 7c<_j55( input.close(); &Gm3 } K]^Jl0 catch(IOException e){e.printStackTrace ();} RF~c/en catch(Exception e){e.printStackTrace ();} #8%~ u+"N } 821
6_Qm P`
Gb}]rW @# .a5 private void processErrorCode(int nErrorCode) roIc1Ax: { a,:Nlr3 System.err.println("Error Code : " + nErrorCode); Sg(\+j= } 51;Bc[)% eMP0BS" <AHdz/N //停止文件下载 v5FfxDvw public void siteStop() mAe)Hy % { \=(U tro bStop = true; bE jQMlb for(int i=0;i<nStartPos.length;i++) m$g{& fileSplitterFetch.splitterStop(); =7S\-{ ;9)=~) _z#S8Y } mhNgXp)_56 } >^v,,R8j //负责部分文件的抓取 }To-c' **FileSplitterFetch.java 7!e kINQ */ z:08;}t package NetFox; !1<>][F `R-VJR 2" c=Zurqj import java.io.*; 3)l<'~"z< import java.net.*; o%h[o9i #BI6+rfv| Q:]v4/MT public class FileSplitterFetch extends Thread { }dEf |6_ Slp_o\s$@ `Tr !Gj_ String sURL; //File URL %.:]4jhk long nStartPos; //File Snippet Start Position 3B4C@ { long nEndPos; //File Snippet End Position i}C%`1+( int nThreadID; //Thread's ID zB6&),[,v boolean bDownOver = false; //Downing is over 9"dZ4{\! boolean bStop = false; //Stop identical ,!98VJmr FileAccessI fileAccessI = null; //File Access interface OV-#8RXJ .0dx@Sbv Wf&i{3z[ public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException ALKzR433/ { >6'brb this.sURL = sURL; )2F%^<gZ# this.nStartPos = nStart; hM8FN this.nEndPos = nEnd; HZ89x|Hk_ nThreadID = id; ?u{D-by%& fileAccessI = new FileAccessI(sName,nStartPos);//定位 f%%'M.is } ]/Cu,mX 2'?C <7j"CcJzZ public void run() "g1Fg.o { @nM+*0
$d while(nStartPos < nEndPos && !bStop) D Z=OZ.v { Gx(%AB~9$ WAVEwA`r iv6bXV'N try{ %vU*4mH URL url = new URL(sURL); x'
3kHw HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); %;O# y3, httpConnection.setRequestProperty("User-Agent","NetFox"); %z["TVH String sProperty = "bytes="+nStartPos+"-"; eGI&4JgJ. httpConnection.setRequestProperty("RANGE",sProperty); 'uLYah Utility.log(sProperty); ZC&4uNUr Bs<LJzS{V e!4Kl: InputStream input = httpConnection.getInputStream(); 1tH#QZIT //logResponseHead(httpConnection); z|zd=3c p49T3V i]0$7s9! byte[] b = new byte[1024]; QaAMiCZFR int nRead; N||s# while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) A~'p~@L { 5:l"* nStartPos += fileAccessI.write(b,0,nRead); 2/l4,x //if(nThreadID == 1) 9<*<-x{A17 // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); Cx8
H } _;k))K^ L$}'6y/@ @Hst-H.l<l Utility.log("Thread " + nThreadID + " is over!"); |d_ rK2 bDownOver = true; ~#iAW@ //nPos = fileAccessI.write (b,0,nRead); ~VJP:Y{[ } rB3b catch(Exception e){e.printStackTrace ();} O9)k)A]`O } .%mjE' } [,mcvO; 6
ZVD<C :\ b'4r5@GO //打印回应的头信息 SrXuiiK public void logResponseHead(HttpURLConnection con) BsN~Z!kd { A;Uw
b for(int i=1;;i++) 8hvh
xp { ]\:l>< String header=con.getHeaderFieldKey(i); "yxBD
7 if(header!=null) ~8G cWy6 //responseHeaders.put(header,httpConnection.getHeaderField(header)); WFpR@53Db Utility.log(header+" : "+con.getHeaderField(header)); ^ px)W,O else pXHeUBY. break; 1V1T1 } F6#U31Q= } SQx:`{O n!y}p q6 |)u|@\{ public void splitterStop() @GE:<'_:{ { FI(M 1iJ bStop = true; WjMP]ND#c } @5(HRd &0S/]E`_M ,<?M/'4}G } "Q<*H<e &,@wLy^T hTbot^/ /* H0i\#)Xs **FileAccess.java U9p^?\-= *//文件访问(定位,写) YJ^TO\4WM package NetFox; oJTsrc_- import java.io.*; Nm/Fc Gk5SG_o 8RR6f98FF public class FileAccessI implements Serializable{ ;F<)BEXC< 3
,?==? //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 >#\&%0OZw RandomAccessFile oSavedFile; h/%Hk;|9 long nPos; ; i><03 3M&75OE >, }m=X8 public FileAccessI() throws IOException {m%X\s;ni { kY6))9 O this("",0); d.&~n`Rv!p } BO p&s>hI {L8(5 }`9}Q
O public FileAccessI(String sName,long nPos) throws IOException V-w[\u { f V.(v& oSavedFile = new RandomAccessFile(sName,"rw"); =>CrZ23B" this.nPos = nPos; /vB%gqJvX oSavedFile.seek(nPos); 7M1*SC } rLcQG LHWh-h(s KV0e^c; public synchronized int write(byte[] b,int nStart,int nLen) \0pJ+@\T9 { UmU=3et<Wj int n = -1; 7c6-S@L try{ pz^"~0o5 oSavedFile.write(b,nStart,nLen); V@K}'f~ n = nLen; ls6ywLP{ } 8L 9;VY^Y catch(IOException e) [M2,bc8SJV { xZmKKKd0* e.printStackTrace (); !{SU G+.2 } MT#9x> N_r*Ig ][bz5aV return n; DD'<zL[ } 9#6ilF:F ^B?koU l^ s$:]$&5 } J\
hv
.Mf.m Hv0sl+ /* &H5
6mL{ **SiteInfoBean.java zAB-kE\) */ rf1nC$Sop package NetFox; n]coqJ Yjk A^e ,-DE;l^Q= public class SiteInfoBean { ? *I9 |_[mb(<| (DKpJCx private String sSiteURL; //Site's URL oRWsi/Zf private String sFilePath; //Saved File's Path )vGRfFjw_ private String sFileName; //Saved File's Name N'm:V private int nSplitter; //Count of Splited Downloading File )_2!1 gYzKUX@ KS(T%mk\ public SiteInfoBean() sQihyq6U; {//nSplitter的缺省值为5 J;q3
fa //default value of nSplitter is 5 JG}U,{7( this("","","",5); xI:;%5{LN } <JH0 & "l +Jx|h\ @1Zf&'/6 public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) x=au.@psBS { V`fh,(: sSiteURL= sURL; J;_JHlK sFilePath = sPath; nVyb B~.= sFileName = sName; 9'5,V{pj this.nSplitter = nSpiltter; |+`hSA W+K=M*^D;c &*)tqQeQf } BTd'bD~EA 6/#= dv [Q 2t,tQx public String getSSiteURL() Vj?.' ( { GF/p|I D return sSiteURL; UN>hJN;c } {&h &: >MP PYVn7 O&w$ public void setSSiteURL(String value) wH${q@z _ { 06Hn:IT18 sSiteURL = value; 3&?Tc|F+ } BxZop.zwE( vCpi|a_eCu am"/Anml| public String getSFilePath() .PAkW2\# { uqO51V~ return sFilePath; J0=`n(48B } HWefuj M $~h(3 }=GyBnXu public void setSFilePath(String value) iPFYG { BEI/OGp sFilePath = value; |[{;*wtv } GO?-z 0V ~l}TlRqL ^c(PZ,/#JB public String getSFileName() BklB3*n { E$ngmm[ return sFileName; g3Xz- } <hK$Cf_ PO%]Jme |t]9RC.;7 public void setSFileName(String value) ToMX7xz6 { .i=%gg sFileName = value; D{l.WlA. } uRL3v01?H0 AV2q* _ma4 public int getNSplitter() Y?5yzD: { VUnEI oKM return nSplitter; e:,.-Kvzp` } ?xf;#J+{8 wl{p,[] eh`V#%S= public void setNSplitter(int nCount) 3,F/i+@ { mm{U5 nSplitter = nCount; +I Ze`M%n } -y\N 9 } eLC&f} Z956S$gS Qrt8O7&(' /* 7K;dVB **Utility.java XsG]-Cw */ _L=vK=, package NetFox; c\]L "w'YZO]> "yz\p, public class Utility { ROjjN W`W :>;psR Q./lX: public Utility() LNN:GD)> { oOL3O@)w> Z~,.l
)R +o8C } $3[cBX.= #y*=UV|h //线程睡眠 K?;p: public static void sleep(int nSecond) - dOT/%Ux { L$Leo6<3a try{ ]8_h9ziz Thread.sleep(nSecond); H3c=B /+ } w7Pe<vT catch(Exception e) RYV6hp)| { >=`c [=:Z_ e.printStackTrace (); 4bxkp3~h; } Xou#38&p> } 5"gRz9Ta` ATzNV=2s //日志 ZKR z=( public static void log(String sMsg) ~r!5d@f.6 { -+9x 0-P System.err.println(sMsg); wrO>#`Z } vW{cBy i]53A0l _$'Mx'IC= public static void log(int sMsg) ^kl9U+ { cyhD%sB[D9 System.err.println(sMsg); >b["T+ } 5j{@2]i } epR~Rlw>2 )PG,K4z C}h@ El /* r;XQ i **TestMethod.java NI1HUUZz */ &V?q d{39 package NetFox; v2n0[b0 >Y/[zfI2 y\_S11{v public class TestMethod { S[a5k;8GL O|>1~^w #c^Q<&B public TestMethod() 2&Byq { ///xx/weblogic60b2_win.exe 7RP_
^Cr+ try{ yo*iv+l SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); /,Rca1W //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); ~t:b<'/ SiteFileFetch fileFetch = new SiteFileFetch(bean); Qsntf.fT fileFetch.start(); P*PL6UQ } mU=6"A0
U catch(Exception e){e.printStackTrace ();} |\a:]SlH Xo@YTol nF'xV44" } >-w=7,?'?z BJ9sR.yX62 h6h1.lZ public static void main(String[] args) u3wC}Zo { ;-?ZI$ new TestMethod(); {}pqxouE } kppRQ Q*[ } +?iM$}8!U 点击下载更多相关资料
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