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/* S\ak(<X **SiteFileFetch.java vcW(?4e */ In4VS:dD package NetFox; 7zz F M import java.io.*; %KF I~Qk import java.net.*; 'g<"@SS+ <IIz-6*V 2r2: public class SiteFileFetch extends Thread { %V;*E] 'WHI.*= 8nZ_. SiteInfoBean siteInfoBean = null; //文件信息Bean nt"\FZ*;3 long[] nStartPos; //开始位置 Fr50hrtkU long[] nEndPos; //结束位置 S?Cd,WxT FileSplitterFetch[] fileSplitterFetch; //子线程对象 m>Z3p7!N} long nFileLength; //文件长度 O-.G(" boolean bFirst = true; //是否第一次取文件 )09ltr0@" boolean bStop = false; //停止标志 !L+b{ File tmpFile; //文件下载的临时信息 ~_0XG0oA DataOutputStream output; //输出到文件的输出流 Q|[^dju }!xc@ //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) MMO/vJC public SiteFileFetch(SiteInfoBean bean) throws IOException !'!\>x$ { 1Ov oW Nx siteInfoBean = bean; ;^JMX4[ //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); 3\]j4*i! tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); xrXfZ>$5bM if(tmpFile.exists ()) ^PC;fn,I {
cY+fZ= bFirst = false; x _kT
Wq read_nPos(); Z;NaIJiL- } 7*K2zu3 else ,2U { k]AL\)
&W nStartPos = new long[bean.getNSplitter()]; J>+\a1{ nEndPos = new long[bean.getNSplitter()]; Hxy=J } qOmL\'8 h:7\S\|8 g?iZ RM Gv]94$'J9 } <k3KCt vH}VieU 5GPrZY" public void run() 6Ik
v}q_j { 8B+C[Q:+' //获得文件长度 uEhPO //分割文件 hKhad8 //实例FileSplitterFetch 9s!R_R&W. //启动FileSplitterFetch线程 ;dfIzi //等待子线程返回 \PZ;y=]p} try{ ]N\D^`iQ if(bFirst) K}N~KDW R| { G,+3(C nFileLength = getFileSize(); D'%M#S0 if(nFileLength == -1) 'Sgz\=K { CXuMNa System.err.println("File Length is not known!"); 9]T61Z{OW1 } %jx<<hW else if(nFileLength == -2) ci+ajON { >`[+24e System.err.println("File is not access!"); &*8.%qe; } Migl else DD { CX2qtI8N? for(int i=0;i<nStartPos.length;i++) 3=?,Dv0P { 7k%!D"6_R nStartPos = (long)(i*(nFileLength/nStartPos.length)); ;FuST } (QojIdHt for(int i=0;i<nEndPos.length-1;i++) 2^=.f?_YR { Ll%}nti nEndPos = nStartPos[i+1]; 6uUzky } .i )n1 nEndPos[nEndPos.length-1] = nFileLength; E:uTjXt } yW*,Llb5 } !K2QD[x Piw i O` !XW8 //启动子线程 ml)\R L fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; #N|JC d_ for(int i=0;i<nStartPos.length;i++) ,y-!h@( { TtWzjt fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), o:*$G~. k siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), V@y&n1?6 nStartPos,nEndPos,i); (+xT5 2 Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); jUZ$vyT fileSplitterFetch.start(); X,lhVT
| } t+pA9^$[` // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), `WMU'ezF siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); NU'2QSU8 // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", \R-'<kN.* nEndPos = " + nFileLength); JSylQ201 // fileSplitterFetch[nPos.length-1].start(); {md5G$*% U|QP]6v q-@&n6PEOZ //等待子线程结束 p Djt\R<f //int count = 0; Gf+X<a //是否结束while循环 9GT}_
^fb boolean breakWhile = false; Gr}NgyT<!D B+jh|@- PQ;9iv while(!bStop) B>I:KGkV { j,9/eZRZ write_nPos(); I (k(p\l% Utility.sleep(500);
$tc1te breakWhile = true; *5XOYb?'v. xDPR^xY "~zLG" for(int i=0;i<nStartPos.length;i++) UxF9Ko( ]d { sV0NDM0 if(!fileSplitterFetch.bDownOver) $*:$- { w /PE )xA breakWhile = false; Lr
d- break; II=!E } VV54$a } 9pr.`w if(breakWhile) f)Y~F/[$P break; :AQ9-&i/a- 0`v-pL0| #Jp|Cb<qx //count++; =w:)AWZ //if(count>4) o9C#5%9 // siteStop(); +M#}(hK } O:~J_Wwl! MXDCOe~07 OZz!8-|wE System.err.println("文件下载结束!"); H?ug-7k/ } YRv96|c, catch(Exception e){e.printStackTrace ();} V[Sj+&e& } +7AH|v8 XWNo)#_3 Akws I@@ //获得文件长度 k!bJ&} Q(b public long getFileSize() -eD]gm { 8<ev5af int nFileLength = -1; SXE@\Afj try{ (c"!&&S^ = URL url = new URL(siteInfoBean.getSSiteURL()); q
\fyp\z HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); R>&8%%# httpConnection.setRequestProperty("User-Agent","NetFox"); \P"Ol\@ *XYp~b Z( "-7_ int responseCode=httpConnection.getResponseCode(); .LnknjC if(responseCode>=400) mb%U~Na { =:6B`,~C processErrorCode(responseCode); QoxQ"r9Wh return -2; //-2 represent access is error ^K4?uABc } yh|+Usa `ueOb je 3Qq1 String sHeader; ;R<V-gab Bga4kjfmk .wlKl[lE2 for(int i=1;;i++) \D]9:BNJ { x;/dSfv_ //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); >Y+m54EE //Utility.log(in.readLine()); Br{(sL0e sHeader=httpConnection.getHeaderFieldKey(i); P*U^,Jh< if(sHeader!=null) IGlyx'\_ { ;i/? fw[h if(sHeader.equals("Content-Length")) vCK+v
r! { k{hNv|:, nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); BnDCK@+|Q break; ^ZRZ0:rZ } cW"DDm
g } zKaj<Og else bC) <K/Q9 break; 0V^I.S/q } Dbq/t^ } 2|WM?V& catch(IOException e){e.printStackTrace ();} \I<R.49oW catch(Exception e){e.printStackTrace ();} "Y4glomR[ pp7
$Q>6 [gZR}E Utility.log(nFileLength); /;[x3}[ Q7d@+C <%rm?;PBl return nFileLength; s aHY9{) } p&)d]oV> kd]CV7(7 iC>%P&|-)| //保存下载信息(文件指针位置) lkR^2P private void write_nPos() Of$R+n. { TiG?r$6v% try{ @de0)AJG6 output = new DataOutputStream(new FileOutputStream(tmpFile)); 9HlWoHuC output.writeInt(nStartPos.length); >El]5M7h7 for(int i=0;i<nStartPos.length;i++) 0 VG;z#{J { @0NWc
c+ // output.writeLong(nPos); sX*L[3!vN output.writeLong(fileSplitterFetch.nStartPos); 8|L@-F output.writeLong(fileSplitterFetch.nEndPos); pjoyMHWK } ,w9|?%S output.close(); 2dHsM'ze } Aho*E9VW catch(IOException e){e.printStackTrace ();} \DBEs02 catch(Exception e){e.printStackTrace ();} L<B)BEE. } WSv%Rxr8L $;~YgOVZ5 F;kKn:X L //读取保存的下载信息(文件指针位置) Br42Qo2"T> private void read_nPos() Hi/[ { V\e1NS try{ 0S'@(p[A DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); sX3qrRY int nCount = input.readInt(); L$+_ nStartPos = new long[nCount]; ZitmvcMk nEndPos = new long[nCount]; o`7 Z<HF for(int i=0;i<nStartPos.length;i++) ZH>i2|W< { =YfzB!ld nStartPos = input.readLong(); Zs-lN*u7. nEndPos = input.readLong(); ""|;5kJS4 } njO~^Hl7 input.close(); G!G:YVWXP } o~L(;A]yN catch(IOException e){e.printStackTrace ();} h+&iWb3; catch(Exception e){e.printStackTrace ();} H Vhd#Q; } BSB&zp mpVD;)?JmM G`Z<a private void processErrorCode(int nErrorCode) PlK3; { N`3^:EJL8 System.err.println("Error Code : " + nErrorCode); mO(Y>|mm } so/0f1R?~ TA:uB[Ji +{m+aHk //停止文件下载 fE&s 6w& public void siteStop() nt-_)4Fm { }aI>dHL bStop = true; >H5t,FfQL for(int i=0;i<nStartPos.length;i++) %6Vb1?x fileSplitterFetch.splitterStop(); kzNRRs\e jvD_{r z 0zB&} } i_l{#*t } Gm9 //负责部分文件的抓取 (NDC9Lls **FileSplitterFetch.java fkImX:|q */ I|>.&nb package NetFox; a~LdcUYs ST~YO C&%NO;Ole import java.io.*; o:"(\$ import java.net.*; 1[#sHj$Na` J=(i0A Bg zq public class FileSplitterFetch extends Thread { kdx06'4o .J&89I]U S'w}Ir String sURL; //File URL \/gf_R_GN long nStartPos; //File Snippet Start Position 5K682+^5 long nEndPos; //File Snippet End Position @]8flb
)T int nThreadID; //Thread's ID BA@M>j6d boolean bDownOver = false; //Downing is over b`j9}tZ boolean bStop = false; //Stop identical T<b*=i FileAccessI fileAccessI = null; //File Access interface /vi Ic
%= ~Cw7.NA{3 A{k1MA<F6 public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException \*qradgx$ { NjA[(8\: this.sURL = sURL; WS(m#WFQr this.nStartPos = nStart; 0R`>F"> this.nEndPos = nEnd; G(Hr*T% nThreadID = id; -"a(<JC^NI fileAccessI = new FileAccessI(sName,nStartPos);//定位 S~ S>62 }
"^ BA5 ggkz
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public void run() 2G!z/OAj { H"k\(SPVS while(nStartPos < nEndPos && !bStop) Nq\)o{<1 { `.3.n8V ADB)-!$xoi .f. tPm try{ nN@
Ch URL url = new URL(sURL); *8;<w~ HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); <1m` httpConnection.setRequestProperty("User-Agent","NetFox"); o"L8n(\ String sProperty = "bytes="+nStartPos+"-"; Eyk:pnKJb httpConnection.setRequestProperty("RANGE",sProperty); e Y^zs0 Utility.log(sProperty); -%P}LaC< h8Oj
E$
H >SziRm>Y7 InputStream input = httpConnection.getInputStream(); 9=/4}!. //logResponseHead(httpConnection); \ Ucv<S cXf/ '+j;g byte[] b = new byte[1024]; llh
+r? int nRead; u2$.EM/iae while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) uTPAf^| { ydY 7 :D nStartPos += fileAccessI.write(b,0,nRead); V=5*)i/ //if(nThreadID == 1) 7r)]9_[( // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); !O}e)t } B B'qbX3xK Ie=gI+2 K"5q387! Utility.log("Thread " + nThreadID + " is over!"); 61&{I>~1 bDownOver = true; 7IkEud //nPos = fileAccessI.write (b,0,nRead); ht>/7.p] } x>BFK@# catch(Exception e){e.printStackTrace ();} )b=vBs`% } s6(md<r } _/cX!/" QlR~rFs9t ^-n^IR}J //打印回应的头信息 ?[>Y@we public void logResponseHead(HttpURLConnection con) +%KkzdS' { O{7#Xj
:_ for(int i=1;;i++) f?eq-/U R { w2/3[VZ}l String header=con.getHeaderFieldKey(i); )K$xu (/K if(header!=null) hu"-dT;4] //responseHeaders.put(header,httpConnection.getHeaderField(header)); YPq:z"`-y4 Utility.log(header+" : "+con.getHeaderField(header)); &(Hw:W9 else /-^J0f+l3 break; s"w^E\>6 } GE=S.P; } u8|CeA I?%q`GyP5 Qy4Pw\ public void splitterStop() !v9`oL26 { $^czqA-& bStop = true; wxj}k7_(`A } QfPw50N; L\c3D| I5g|)Y Q } 3="vOSJ6& ; !t?* ^J^FGo|M /* G973n **FileAccess.java *14:^neoI *//文件访问(定位,写) #DJZ42 package NetFox; T<Qa`|5> import java.io.*; v''J@ F7 B~qo^ppVU 8f)pf$v` public class FileAccessI implements Serializable{ fi ~@J` )t7MD( //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 eX}aa0 RandomAccessFile oSavedFile; '/0e!x/8 long nPos; "zTy_0[; L2}<2 7 H:y=?X6 public FileAccessI() throws IOException F]>+pU
{ 4@<wN \' this("",0); xE!0p EHd } 8@S]P0lk O<,\tZ'N @]2aPs} }6 public FileAccessI(String sName,long nPos) throws IOException 'o0o.&/= { yIngenr$ oSavedFile = new RandomAccessFile(sName,"rw"); zzo93d this.nPos = nPos; 8<C@I/ oSavedFile.seek(nPos); $9X?LGUz } vJVh%l+ OQ 4h8, :5T=y @ public synchronized int write(byte[] b,int nStart,int nLen) ~EXCYUp4v { R~[~(`/S int n = -1; 2Kr>93O try{ S'ms>ZENC oSavedFile.write(b,nStart,nLen); HUCJA-OZGL n = nLen; >py[g0J } d^!3&y& catch(IOException e) RIO?rt; { vZ$E
[EG} e.printStackTrace (); VGxab;#,:3 } .j|uf[?h /Qef[$!( .Z"`:4O return n; /4;A.r`; } I2SH
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)%`# l;R8"L:,p\ U,6sR /* ,`YBTU **SiteInfoBean.java \QF0(*!! */ D Y4!RjJ47 package NetFox; Gx}`_[- r#&JfAo n|DMj[uT public class SiteInfoBean { T9]0/> xFM^-`7 GJ2ZK=/ private String sSiteURL; //Site's URL /'_<~A private String sFilePath; //Saved File's Path (pP.*`JRv private String sFileName; //Saved File's Name _JTK$\ private int nSplitter; //Count of Splited Downloading File "_dg$j`Y&& Ij =NcP ]SPuNBsy) public SiteInfoBean() vZ57
S13 {//nSplitter的缺省值为5
iD])E/ //default value of nSplitter is 5 z#P`m,~t0 this("","","",5); `{
HWk^ } k\j_hu .\ya WQiRbb X public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) 5/h-Hr { T{`VUS/ sSiteURL= sURL; j;z7T;!i sFilePath = sPath; yJ0%6],^g sFileName = sName; B)L0hi this.nSplitter = nSpiltter; 'r\RN\PT Vky]In= -Eq[J k } `#8k Jt l Ib
d9F !]D`|HoW public String getSSiteURL() UQ7]hX9 { In1n.oRFn^ return sSiteURL; -KfK~P3PF } 4e AMb >b=."i ONDO
xXs public void setSSiteURL(String value) h*!oHS~/l { >G%oWRk sSiteURL = value; oJ3(7Sz } +r;t] tCGx]\ CnZEBAU public String getSFilePath() 5$Kj#9g-# { M<NY`7$^ return sFilePath; 6<QC|>p } t6mv pnz: <V"Y( :FHEq~4 public void setSFilePath(String value) &IzNoB { w3sU& |N sFilePath = value; aBG^Xhx } *x]*% ~x<?Pj xLi3|^q public String getSFileName() X/vyb^:U { $\/^O94-l return sFileName; JN` $Fq+ } .`*]nN{ K*b* ]hf{ l:JVt`A4? public void setSFileName(String value) ;fW~Gb?" { yTK3eK sFileName = value; G}+@C] } {I$iD hwL`9.w Z2})n
- public int getNSplitter() [XDV-6KCE. { ">3t+A return nSplitter; ZS(%!+ M } +lVA$]d 'xG J;pY !5?_) public void setNSplitter(int nCount) _Z9d.- { .s,04xW\ nSplitter = nCount; gt(p%~ } }d>.Nj#zh } QKq4kAaJ! |%ZJN{!R :3D6OBkB /* &QW&K **Utility.java _6r[msH" */ 9s[ package NetFox; 0!ZaR6 `O0Qtq. c^pQitPv public class Utility { "Ueq 9*K-d'm P!IA;i public Utility() ob2_=hQnC { 6D2ot&5WW TlkhI kp<Au)u } [M%?[E}> &oHr]=xA //线程睡眠 +>*=~R public static void sleep(int nSecond) ji\LC%U- { rXMc0SPk try{ z\ONwMl Thread.sleep(nSecond); \7*|u } KU
oAxA catch(Exception e) _D?/$D7u#% { \mJR^t e.printStackTrace (); U/s
Z1u- } h4 9q(085V } eWex/ m fiA8W //日志 XxdD)I public static void log(String sMsg) wEX<[#a- { o
-)[{o\ System.err.println(sMsg); %$Py @g } G7+ {O7 z;?jKE p =>3,]hnep public static void log(int sMsg) gzSm=6Qw0 { +6jGU'}[ System.err.println(sMsg); hFr+K1 } -=8f*K[W }
8J$1N*J| *aWh]x9TlU
%r.C9 /* |;)_-=L0P **TestMethod.java >yn]h4M */ lt:&lIW,3 package NetFox; N}7b^0k 0n`Temb/ sH2xkUp public class TestMethod { XP% _|Q2X 7_qsVhh]$E |ZifrkD= public TestMethod() ;^0ok'P\~9 { ///xx/weblogic60b2_win.exe 047PlS try{ Vn{;8hZ:a SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); >yT1oD0+x //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); !A%
vR\ SiteFileFetch fileFetch = new SiteFileFetch(bean); CVkJMH_ fileFetch.start(); Z`GEF|eh } G9QvIXRi catch(Exception e){e.printStackTrace ();} H*3u]Ebh Q#ksf
h!D DA>nYj-s } piIz ff >d]-X] -#/DK public static void main(String[] args) ]:?S}DRG { $E^sA|KcT new TestMethod(); rDoMz3[w } 1EQ:@1 } Lk#)VGk: 点击下载更多相关资料
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