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/* GWFF.Mo^ **SiteFileFetch.java T_R2BBT
v
*/ yPY}b_W package NetFox; '8%jA$o\g import java.io.*; YTpiOPf import java.net.*; PAng(tubl Vu.VH([b]Q &O
+?#3 public class SiteFileFetch extends Thread { /tm2b<G n(I,pF "DaE(S& SiteInfoBean siteInfoBean = null; //文件信息Bean 4Vtug> long[] nStartPos; //开始位置 1lo.X_ long[] nEndPos; //结束位置 Q$+6f,m#W FileSplitterFetch[] fileSplitterFetch; //子线程对象 P:D;w2'Q long nFileLength; //文件长度 8\WV.+ boolean bFirst = true; //是否第一次取文件 $ UNC0(4 boolean bStop = false; //停止标志 mtU{d^B File tmpFile; //文件下载的临时信息 Q g~cYwX DataOutputStream output; //输出到文件的输出流 |RjAp.pm L0l'4RRm\ //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) ]K?;XA3 dZ public SiteFileFetch(SiteInfoBean bean) throws IOException {wy{L-X { U#V&=~- siteInfoBean = bean; 8[b_E5!V //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); T@wgWE<0y_ tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); 'oKen!?A if(tmpFile.exists ()) u9nJ;: { ai%*s&0/Y bFirst = false; n6AA%? 5 read_nPos(); g(_xo\ } \?v?%}x else W4;/;[/L { QC,fyw\ nStartPos = new long[bean.getNSplitter()]; x~Y{
{ nEndPos = new long[bean.getNSplitter()]; GY>G}bfh } O&dBLh!G GYZP?E p* rp9?p% 0$A^ .M; } Hf/ZaBn gY'-C u6nO\.TTtY public void run() 3daI_Nx> { acrR //获得文件长度 arIEd VfNa //分割文件 Um}f7^fp^l //实例FileSplitterFetch 1=Z!ZY}}e //启动FileSplitterFetch线程 z$gtGrU //等待子线程返回 t4iD<{4 try{ ">._&8KkE0 if(bFirst) lihIPMU { _01wRsm%2 nFileLength = getFileSize(); nb<e<>L if(nFileLength == -1) u,V_j|(e { 0~~yYo& System.err.println("File Length is not known!"); \q($8< } wz'= else if(nFileLength == -2)
d^=9YRc { Ul_5"3ze System.err.println("File is not access!"); #M%K82" } TZ63=m else &szYa-K* { V408uy-M for(int i=0;i<nStartPos.length;i++) 7u{V1_n1 { ^Q6?T(%$ nStartPos = (long)(i*(nFileLength/nStartPos.length)); WBD?|Ss } He,,bq for(int i=0;i<nEndPos.length-1;i++) e)= "Fq! { ZNVrja* nEndPos = nStartPos[i+1]; qJ sH } U9ZuD40\ nEndPos[nEndPos.length-1] = nFileLength; It7R}0Smg } tr5j<O } SRtw k".kbwcaF uNkJe //启动子线程 lJ]]FuA-Q fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; 'hE'h?-7 for(int i=0;i<nStartPos.length;i++) qA;Gl"HF { q{&\nCy fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), 0-~s0R89A siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), []v$QR&u#v nStartPos,nEndPos,i); )s,LFIy<A Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); Gx
%=&O fileSplitterFetch.start(); ? cXW\A( } /IN#1I!K // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), 5 w(nttYH siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); HKr}"`I. // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", 43x2BW&& nEndPos = " + nFileLength); Lb)rloca // fileSplitterFetch[nPos.length-1].start(); 6DU~6c=) _p>F43%p ,-hbwd~M //等待子线程结束 n$`+03 a //int count = 0; |p!($ //是否结束while循环 :hT.L3n, boolean breakWhile = false; e!PB3I %ufh "={* 0P while(!bStop) ]J [d8S5 { S)g:+P write_nPos(); Fgi`g{N Utility.sleep(500); }K8e(i6z breakWhile = true; =[8K#PZ$w _P=+\[|y tAE(`ow/Ur for(int i=0;i<nStartPos.length;i++) m%
3 D { HdgNy \ if(!fileSplitterFetch.bDownOver) x!fG%o~h { "w$,`M?2 breakWhile = false; ?m5EXe break; *L9v(Kc } Gbjh|j= } #CPLvg# if(breakWhile) 7UY4* j|[C break; s;YbZ*oaMe {1Y@%e od{\z //count++; 4d%0a%Z //if(count>4) q8&l%-d` // siteStop(); %59uR}\ } Rw%%
9 h}!9?:E 5VP0Xa ~ System.err.println("文件下载结束!"); ;}iB9 Tl } ff5 gE' catch(Exception e){e.printStackTrace ();} z~X/.> } F@k}p-e~ 9Q^cE\j qC{JsX`~ //获得文件长度 |ZE^'e*k public long getFileSize() Db<#gH { @J&korU int nFileLength = -1; X3a 9- try{ 'prHXzi(h URL url = new URL(siteInfoBean.getSSiteURL()); %0} ^M1 HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); ]VxC]a2 httpConnection.setRequestProperty("User-Agent","NetFox"); j{YYG| z4:<?K R2n
2mQ < int responseCode=httpConnection.getResponseCode(); g\fj6 if(responseCode>=400) \7i_2|w { ;<N:! $p processErrorCode(responseCode); m)} 01N4 return -2; //-2 represent access is error uf90 } GkX Se)#p ('SId@ ) jH`lY) 1 String sHeader; |bz%SB BaW4 s4u uZtN,Un for(int i=1;;i++) pd#Sn+&rf { 6_4B! //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); 7M~sol[* //Utility.log(in.readLine()); {='Bd6_= sHeader=httpConnection.getHeaderFieldKey(i); eFG(2OVg}M if(sHeader!=null) RzjUrt { l>}f{az-T if(sHeader.equals("Content-Length")) \$ipnQv { t$z[ja= nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); ^\AeX-q2v' break; u30D`sky } Inv`C,$7Q# } ?' .AeoE- else m<hP"j break; KF00=HE|] } s91[@rh/ } -1,0hmn=+ catch(IOException e){e.printStackTrace ();} /V:9*C catch(Exception e){e.printStackTrace ();} [K.1 X=O} Q}|K29Y:p ,JE_aje7 Utility.log(nFileLength); Q0Ft.b X)[tb]U/Wx }a||@unr return nFileLength; |g)C `k } d(o=)!p A}SGw.3 PQkw)D<n]_ //保存下载信息(文件指针位置) ve
ysW(z private void write_nPos() \jtA8o%n { 0SQr%:zG try{ Fs( PVN output = new DataOutputStream(new FileOutputStream(tmpFile)); Z-Qp9G'
output.writeInt(nStartPos.length);
2Qp}f^ for(int i=0;i<nStartPos.length;i++) ![\-J$ { N!7}B // output.writeLong(nPos); iyl
i/3| output.writeLong(fileSplitterFetch.nStartPos); RkYn6 output.writeLong(fileSplitterFetch.nEndPos); 80*hi)ux[
} P[WkW# output.close(); Gv&G2^ } +QU>D:l catch(IOException e){e.printStackTrace ();} Sp80xV_B catch(Exception e){e.printStackTrace ();} E(P
6s;LZ } FKTF?4+\U Z5>~l D#b*M)X" //读取保存的下载信息(文件指针位置) &2y4k"B&) private void read_nPos() ::oFL#+ { w'2FYe{wj try{ J+`aj8_ B DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); ixu*@{<Z( int nCount = input.readInt(); y|}~"^+T nStartPos = new long[nCount]; !k)6r6 nEndPos = new long[nCount]; /RxP:>hVv for(int i=0;i<nStartPos.length;i++) '\I(n|\ { {h@\C|nF nStartPos = input.readLong(); c4Zpt%:}h nEndPos = input.readLong(); TwPQ8}pj? } sQa;l]O:NC input.close(); [34N/;5 } Cf=H~&`Z catch(IOException e){e.printStackTrace ();} [i` catch(Exception e){e.printStackTrace ();} tp] 5[U } V:kRr cX Dcvul4Q tk%f_"} private void processErrorCode(int nErrorCode) X
."z+-eh { m}uOBR+ System.err.println("Error Code : " + nErrorCode); bV8+Eu } B`B=bn+4 \vAjg eBrNhE-[G] //停止文件下载 l(?B0 public void siteStop() etr-\Cp { [s>3xWZ+a bStop = true; >ou=}/< for(int i=0;i<nStartPos.length;i++) ?{S>%P A_B fileSplitterFetch.splitterStop(); .>B'oD <:v+<)K 8%7%[WC# } @f-X/q]P } <?nI O //负责部分文件的抓取 "tz6O0D **FileSplitterFetch.java \Fz9O-jb4 */ 8wsU`40=Q package NetFox; 0>sa{Z U>E:
Ub0r Jj-\Eb? import java.io.*; 5?k5J\+ import java.net.*; KNx/1lf m^D'p (F4e}hr& public class FileSplitterFetch extends Thread { xnY?<?J"! $jN.yNm0 /MF
7ZvN. String sURL; //File URL o&?c,FwN long nStartPos; //File Snippet Start Position <b:%o^ long nEndPos; //File Snippet End Position i.Rl&t int nThreadID; //Thread's ID .11l(M boolean bDownOver = false; //Downing is over &kg^g%% boolean bStop = false; //Stop identical _!03;zrO FileAccessI fileAccessI = null; //File Access interface kv:9Fm\$ 0^ODJ7 fu"cX; public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException : ,l7e { a: "1LnvR this.sURL = sURL; -+*h'zZ[<w this.nStartPos = nStart; F^yW3|Sb this.nEndPos = nEnd; i HD!v7d7 nThreadID = id; 2LwJ%! fileAccessI = new FileAccessI(sName,nStartPos);//定位 "I.6/9 } h6h6B.\Ld cE]z Tu?! =}`d public void run() E3uu vQ#| { Je6[q while(nStartPos < nEndPos && !bStop) QL/KY G { \;{ ]YX t?GH
V3V d51lTGH7Z try{ <Vhd4c URL url = new URL(sURL); 24jf`1XFW HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); W0gS>L_ httpConnection.setRequestProperty("User-Agent","NetFox"); 0'Pjnk-i String sProperty = "bytes="+nStartPos+"-"; VE )D4RL httpConnection.setRequestProperty("RANGE",sProperty); Fz7t84g( Utility.log(sProperty); Q|(}rIWOQA s6 yvq#: k~>(XG[x& InputStream input = httpConnection.getInputStream(); C%o|}i v" //logResponseHead(httpConnection); WX&IQ@ T~[:oil \O|SPhaIf byte[] b = new byte[1024]; 7Jn%XxHq int nRead; B.8B1MFm while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) 6 4_}"fU { LDlYLsF9 nStartPos += fileAccessI.write(b,0,nRead); tu
-a`h_NJ //if(nThreadID == 1) #1<m\z 7l // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); t+?Bb7p,H } LDt6<D8,Q $plk>Khg B7%,D} Utility.log("Thread " + nThreadID + " is over!"); ,!:c6F+ bDownOver = true; \*$^}8 //nPos = fileAccessI.write (b,0,nRead); $BwWQ?lp } hi8q?4jE catch(Exception e){e.printStackTrace ();} 4Q|>k)H } <o(;~ } UsE\p9mCuV FZ-Wgh
0z =6sP`: //打印回应的头信息 7[m+r:y public void logResponseHead(HttpURLConnection con) 0+>g/> { `d_T3^ayu for(int i=1;;i++) T)! }Wvv { dSGdK
$ XA String header=con.getHeaderFieldKey(i); ]\39# if(header!=null) #/G!nN # //responseHeaders.put(header,httpConnection.getHeaderField(header)); ~fXNj-'RW Utility.log(header+" : "+con.getHeaderField(header)); 1w>[ else y3oq{Z> break; |J&\/8Q } -nb U5o } "hyfo,r tiK M+
;C bQaRl=:[: public void splitterStop() 6N@=*0kh- { *l_a=[<[ bStop = true; '}hSh } gfL :SP8 /$; Z ~^P o-<i+ To% } yhH2b:nY(9 uX7L1~s- c~T{; /* :w^:Z$-hf **FileAccess.java :|j[{;asY *//文件访问(定位,写) ~?/7:S package NetFox; s\ *p|vc import java.io.*; $xu2ZBK Zo=,!@q( 4!!|P public class FileAccessI implements Serializable{ maap X/J <exCK*G //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 voZaJ2ho/O RandomAccessFile oSavedFile; k=)U long nPos; Sm/8VSY BbB3#/g Hca(2 ]T- public FileAccessI() throws IOException !{&r|6 { x.1=QF{! this("",0); ZcA"HD% } :V9Q<B^ N<JI^%HBgP UN?tn}`! public FileAccessI(String sName,long nPos) throws IOException D4$b-?y { Z_ElLY oSavedFile = new RandomAccessFile(sName,"rw"); \%r#>8c8 this.nPos = nPos; \KV.lG! oSavedFile.seek(nPos); &OU.BR> } rVabkwYD +C=vuR I]ej ]46K public synchronized int write(byte[] b,int nStart,int nLen) L`t786
(M { dOD(< int n = -1; lr&2,p< try{ AG >D,6Y oSavedFile.write(b,nStart,nLen); tN{0C/B9 n = nLen; l&H-<Z.8m } ca=MUm=B catch(IOException e) .r/s.g { (s'xO~p e.printStackTrace (); P0UR{tK } &tOo[U? 9^Xndo]y +9HU&gQ3 return n; {r&r^!K; } &wNr2PHd# cJSNV*< W@}@5,}f> } R655@|RT R/{h4/+vJ .3EEi3z6z /* eGMw:H **SiteInfoBean.java (F'~K,0 */ 2`i&6iz package NetFox; nu^@}|UG _3
!s{ ]FR#ZvM>x public class SiteInfoBean { 6?"Gj}|r 7:~3B-Tb v0'z''KM! private String sSiteURL; //Site's URL :{w3l O private String sFilePath; //Saved File's Path I>MLI=[Kg private String sFileName; //Saved File's Name r[E #JHw private int nSplitter; //Count of Splited Downloading File ZZi9<g1 E.#JCO|(1 1mV
'
~W public SiteInfoBean() X'd\b}Bm {//nSplitter的缺省值为5 NiG&Lw*8 //default value of nSplitter is 5 pTAm} this("","","",5); UHJro9 } ZV Ko$q:F ycN!N PR;Bxy public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) ''2:ZX X { 6@Q; LV+ sSiteURL= sURL; .WglLUJ:Z sFilePath = sPath; L< sFileName = sName; "P5,p"k:) this.nSplitter = nSpiltter; :Nz
TEK %m|BXyf]_B B{#Fm6 } ^Oj^7.T+ 6heK8*.T H(
LK}[ public String getSSiteURL() dnANlNMk? { xfUV'=~( return sSiteURL; ILG&l<!E } e23& d "dG*HKrr NrcV%-+u% public void setSSiteURL(String value) lyowH{.N"3 { $1X!Ecq_ sSiteURL = value; m[ S1 } a;i}<n7 tm;\m!^X{ TPJuS)TU9 public String getSFilePath() uxW |&q { $y)tcVc return sFilePath; %PVu>^ } MDpx@.A, ][f 0ZMa J^kSp public void setSFilePath(String value) @$b7
eu { b#(QZ sFilePath = value; <{V{2V# } _)CCD33$ 45+kwo0 MNfc1I_# public String getSFileName() g6q[
I8 { j1JdG<n return sFileName; \KEmfCx'n } 2%l(qfN9 p,4S?cr>a CyS.GdyP public void setSFileName(String value) AfW:'>2 { 'mU\X!-
4< sFileName = value; =+e;BYD#! } 9dg+@FS}= `=TJw,q S{cK~sZj public int getNSplitter() 'pAq;2AA { Ud-c+, xX return nSplitter; B)DtJf } wh]v{Fi' <.|]%7 -P]onD
public void setNSplitter(int nCount) O|;|7fCB\ { 6%VRQ#g! nSplitter = nCount; ]xJ2;{JWsO } J@Nq } K>+c2;t; En+`ZcA\z }g.)%Bw! /* ovtZHq/ **Utility.java cMUmJH */ P; =,Q$e8 package NetFox; %yy|B pr"q-S>E w=" public class Utility { K?wo AuY
4m9]d) ds+0y;vc public Utility() =sXk,I; { e=6C0fr #w[Ie+ \T!tUd } $8_b[~%2 m!<uY?,hf //线程睡眠 w##$SaTI public static void sleep(int nSecond) c+TCC%AJQI { d_Y7/_i try{ 5DeAH; Thread.sleep(nSecond); mVyF M -` } _`]YWvh catch(Exception e) K30{Fcb< h { 5
.bU2C e.printStackTrace (); r/ LgmVRn } \g;-q9g;O } [M.!7+$o XuW>GT/ //日志 Pu]Pp`SP public static void log(String sMsg) n ^C"v6X
{ _E[)_yH'- System.err.println(sMsg); h1N{;SWQ } SxRa?5 >]8H@. \ *+cW)klm public static void log(int sMsg) &14Er,K { %,5_]bGvb
System.err.println(sMsg); *p%=u>?& } 8DJoQl9 } pj'[
H t'Pn* =I9RM9O< /* 7pz #%Hf **TestMethod.java QK/~lN */ FAd4p9[Y package NetFox; }7|UA%xz
lxD~[e LZ*ZXFIg public class TestMethod { ^b`aO$ w
]$Hr h>'Mh;+ public TestMethod() >*goDtTjp { ///xx/weblogic60b2_win.exe %:]ive]e try{ ]EPFyVt~3 SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); nx'D&,VX //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); -]~vEfq+T SiteFileFetch fileFetch = new SiteFileFetch(bean); f+W %X fileFetch.start(); {`1gDKH } PzDekyl catch(Exception e){e.printStackTrace ();} !@kwHJkv (\NZ)Ys OAZ5I)D> } <MBpV^Y} -eoXaP{[ a{7'qmN1 public static void main(String[] args) P>i[X0UnL { YeCS`IXm new TestMethod(); s:\FlQ0 } x.~A vJ } }0~4Z)?e3 点击下载更多相关资料
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