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/* EwN}l **SiteFileFetch.java ;+%rw 2Z,B */ ;TYBx24vD' package NetFox; Dtk=[;"k2a import java.io.*; p+eh%2Jm import java.net.*; z_HdISy0 /xhKd]Q 1#x0 q:6 public class SiteFileFetch extends Thread { 5+vaE
2v _/|\aqF. aUp
g u" SiteInfoBean siteInfoBean = null; //文件信息Bean 80I#TA6C long[] nStartPos; //开始位置 g#bRT*,L long[] nEndPos; //结束位置 ^W^OfY FileSplitterFetch[] fileSplitterFetch; //子线程对象 @dKTx#gZ long nFileLength; //文件长度 7I}uZ/N boolean bFirst = true; //是否第一次取文件 'DR!9De boolean bStop = false; //停止标志 eFgA 8kY) File tmpFile; //文件下载的临时信息 ^[[P*NX3 DataOutputStream output; //输出到文件的输出流 ax`o>_) 7! Nsm //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) Tk}]Gev public SiteFileFetch(SiteInfoBean bean) throws IOException #"!<W0 { TH;hO).u siteInfoBean = bean; TOt dUO //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); &
21%zPm tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); ZVBXx\{s if(tmpFile.exists ()) L0,'mS { 2G7Wi!J bFirst = false; &d!GImcxQ read_nPos(); >Tgv11[ } [JiH\+XLPs else <I?Zk80 { 7.Op< nStartPos = new long[bean.getNSplitter()]; <E~'.p, nEndPos = new long[bean.getNSplitter()]; X'srL j. } dV_G1' ?`s8 pPc4 23PGq%R **%37 } kVgTGC"L= P
pb\6|* fhiM U8(& public void run() V
gWRW7Se { Ml_^
`vn //获得文件长度 79gT+~z //分割文件 (QEG4&9 //实例FileSplitterFetch QRUz`|U //启动FileSplitterFetch线程 [0!( xp^ //等待子线程返回 01]f2.5 try{ d{?LD?,) if(bFirst) us-L]S+lm { j#|ZP-=1_ nFileLength = getFileSize(); -@'FW*b if(nFileLength == -1) q9"96({\@ { i1UsIT System.err.println("File Length is not known!"); e'~3oqSvR } Q,g\ else if(nFileLength == -2) 7!1S)dup { 3]Ct6 System.err.println("File is not access!"); (PLUFT } m
O_af else 2/?|&[ { ch]IzdD for(int i=0;i<nStartPos.length;i++) Q &8-\ { Oketwa nStartPos = (long)(i*(nFileLength/nStartPos.length)); J.a]K[ci } x2xRBkRg= for(int i=0;i<nEndPos.length-1;i++) V3Bz
Mw\9r { [agMfn nEndPos = nStartPos[i+1]; _BufO7`. } YK_7ip.a[ nEndPos[nEndPos.length-1] = nFileLength; )~>YH*g } U^PgG|0N } dtDFoETz /ZX}Nc g &>O+}>lr9 //启动子线程 \bXa&Lq fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; =;L|gtH" for(int i=0;i<nStartPos.length;i++) UQsN'r\tS { #!=tDc
& fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), VbYdZCC siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), )%TmAaj9d nStartPos,nEndPos,i); F ,kZU$ Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); mH(:?_KrS- fileSplitterFetch.start(); zLQx%Yg! } }MySaL> // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), >*bvw~y, siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); ".%k6W<n // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", P \I|, nEndPos = " + nFileLength); 5P bW[ // fileSplitterFetch[nPos.length-1].start(); X$
D6Ey HS$r8`S?) ctQ/wrkU //等待子线程结束 :FF=a3/"6 //int count = 0; &{:-]g\ //是否结束while循环 gXU8hTd8 boolean breakWhile = false; u8^lB7!e/ `[A];] V`5O{Gg while(!bStop) +@UV?"d { 42{~Lhxt write_nPos(); (FV >m Utility.sleep(500); (7Qo breakWhile = true; hH.G#-JO ~*7]r`6\@ 4H/OBR for(int i=0;i<nStartPos.length;i++) SbZ6t$" { )b)z m2; if(!fileSplitterFetch.bDownOver) /Oono6j { Ri'n breakWhile = false; ]~-r}`] break; XppOU } ZCw]m#lS } e20-h3h+ if(breakWhile) $G>. \t break; ]:;&1h3'7 iU-j"&L5 'w/hw'F6 //count++; <@}9Bid!o //if(count>4) al0L&z\ // siteStop(); jIyQ]:* p } Kw}'W
8` c M5B# TAybC zs;JJk^ System.err.println("文件下载结束!"); [QTV9 } CTK;dM'uQ catch(Exception e){e.printStackTrace ();} *Ex|9FCt$ } 1YA% -~ GbyJ: Ac6=(B //获得文件长度 %y@AA>x! public long getFileSize() *:1ey{w: { y(Td/rY. int nFileLength = -1; 9uY'E'm* try{ Tw%
3p= URL url = new URL(siteInfoBean.getSSiteURL()); 6~{C.No} HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); zDp 2g) httpConnection.setRequestProperty("User-Agent","NetFox"); oU|c.mYe qR.Q,(b| -&f$GUTJ int responseCode=httpConnection.getResponseCode(); |{;G2G1[ if(responseCode>=400) s{++w5s { VQI3G processErrorCode(responseCode); K,]=6Rj return -2; //-2 represent access is error N [@?gFtT } Vi}_{
Cy g`^x@rj`E <#.g=ay String sHeader; =43auFY-P @o^Ww ;jPXs for(int i=1;;i++) <VcQ{F { MDN--p08 //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); 4 :=]<sc, //Utility.log(in.readLine()); DlT{` sHeader=httpConnection.getHeaderFieldKey(i); @;kSx":b if(sHeader!=null) |}1dFp { hph4 `{T if(sHeader.equals("Content-Length")) h![#;>( { 8fb'yjIC nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); >7r!~+B"9' break; ,[Fb[#Qqb } O f#: } u>$t' else X8|EHb< break;
xPgBV~ } "L1Zi.) } d3Rw!slIq catch(IOException e){e.printStackTrace ();} ^.G$Q# y, catch(Exception e){e.printStackTrace ();} Je@v8{][| ;=@0'xPEa- -8Xf0_ Utility.log(nFileLength); iLz@5Zj8 23?rEhKe eQ"E return nFileLength; h~26WLf. } -&;TA0~; 1}37Q&2 M;NX:mX9 //保存下载信息(文件指针位置)
cAy3^{3: private void write_nPos() q;U,s)Uz^ { 9kojLqCT try{ 2oU_2P output = new DataOutputStream(new FileOutputStream(tmpFile)); GL JMP^p output.writeInt(nStartPos.length); &{RDM~ for(int i=0;i<nStartPos.length;i++) G
j1_!.T { 7|D +Ihy; // output.writeLong(nPos); {[(h[MW# output.writeLong(fileSplitterFetch.nStartPos); OTp]Xe/ output.writeLong(fileSplitterFetch.nEndPos); \1`O_DF~o } j4b4!^fV output.close(); AEuG v}# } )i<j XZ:O catch(IOException e){e.printStackTrace ();} eq" ]%s catch(Exception e){e.printStackTrace ();} S$k&vc(0 } +{>=^9%X $|@ r!/W fatf*}eln //读取保存的下载信息(文件指针位置) >MK98(F private void read_nPos() 9Ee'Cm { sr}E+qf try{ i&k7-< DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); 6Iw\c int nCount = input.readInt(); TKjFp% nStartPos = new long[nCount]; cFv8 Od nEndPos = new long[nCount]; qVPeB,kIz for(int i=0;i<nStartPos.length;i++) rbQR,Nf2x { CNIsZv@Q nStartPos = input.readLong(); h1{3njdr nEndPos = input.readLong(); ~v83pu1!2s } kR9-8I{J input.close(); 0Qd:`HF[ } Jl<2>@ catch(IOException e){e.printStackTrace ();} lLD12d catch(Exception e){e.printStackTrace ();} rH>)oThA# } 875od zT[!o
j7 Hefg[$m private void processErrorCode(int nErrorCode) LF7SS;&~f { Gc!x|V;T System.err.println("Error Code : " + nErrorCode); hEk$d.!} } 1U\z5$V "mNq&$ }`"6aM //停止文件下载 X?$_Sd"G+5 public void siteStop() Vg23!E { njw|JnDv bStop = true; .mAjfP* for(int i=0;i<nStartPos.length;i++) }&e5$lB fileSplitterFetch.splitterStop(); "]iB6 X jX2] pmilrZmm] } \;-|-8Q } :Yks|VJ1 //负责部分文件的抓取 s@DLt+ O5 **FileSplitterFetch.java iX\X>W$P */ Z8oK2Dw package NetFox; ?s _5&j7 ASfaX:ke wf$s*|z import java.io.*; Dxxm="FQZ import java.net.*; :yjFQ9^?& $kKjgQS( T^v}mWCZ public class FileSplitterFetch extends Thread { >*n0n!vF y Wya&|D9 gO^gxJ'0t String sURL; //File URL =ruao'A long nStartPos; //File Snippet Start Position _y>~
yZx long nEndPos; //File Snippet End Position /=, nGk> int nThreadID; //Thread's ID Faf&U%]*` boolean bDownOver = false; //Downing is over ~nPtlrQa#* boolean bStop = false; //Stop identical %#}Z y
FileAccessI fileAccessI = null; //File Access interface Lxk[;j+ rD>f|kA?L ZW}_Qs public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException hL5|69E { nLiY%x`S this.sURL = sURL; `g})|Gx this.nStartPos = nStart; @vB!u[{ this.nEndPos = nEnd; 3 9|MX21k nThreadID = id; 4H-'Dr=G fileAccessI = new FileAccessI(sName,nStartPos);//定位 rt|7h>RQ } ^KELKv,_ 'eX ' F\KUZ[% public void run() l (%1jC8 { JLJ;TM'4= while(nStartPos < nEndPos && !bStop) ,1##p77. { N"1B/u MxGW(p #u
+ v_ try{ |&[EZ+[ URL url = new URL(sURL); AvHCO8h| HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); @gtQQxf" httpConnection.setRequestProperty("User-Agent","NetFox"); pBPl6%C.X- String sProperty = "bytes="+nStartPos+"-"; 2>H24F httpConnection.setRequestProperty("RANGE",sProperty); 5 BJmA2L Utility.log(sProperty); Wr5V`sM {>%&(
z"4~P3>{g InputStream input = httpConnection.getInputStream(); BX^tR1 //logResponseHead(httpConnection); (3&?w y_l -)/$M(Pu" h65-s byte[] b = new byte[1024]; -Vhw^T1iV int nRead; uOGw9O-d9 while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) ilva,WFa^ { -o.:P>/ nStartPos += fileAccessI.write(b,0,nRead); W"3ph6[eW //if(nThreadID == 1) )];K .zP // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); 5P$4 =z91 } 0P(!j_2m 1>&]R= O,A{3DAe0 Utility.log("Thread " + nThreadID + " is over!"); ^Va1f'g bDownOver = true; H$KTo/ //nPos = fileAccessI.write (b,0,nRead); F*K_+
?m } _\HQvH catch(Exception e){e.printStackTrace ();}
4YX3+oS } 7`hP?a= } =6#Eh=7N -FCe:iY! A \_6/vZ%-B //打印回应的头信息 -7(@1@1 public void logResponseHead(HttpURLConnection con) I,'k>@w{s { jMDY(mwt for(int i=1;;i++) <1COZ) { 9RI-Lq` String header=con.getHeaderFieldKey(i); m<g~H4 if(header!=null) CWP2{ //responseHeaders.put(header,httpConnection.getHeaderField(header)); I15{)o(8$ Utility.log(header+" : "+con.getHeaderField(header)); c\V7i#u[d; else )@'}\_a3[] break; ]}(H0?OQR } P}G+4Sk } D{~fDRR U!Z,xx[] K:Q<CQ2 public void splitterStop() iRi-cQVy { % -e 82J1 bStop = true; s&!a } x~j`@k,; )Iq <+IJ :Qf '2.h) } QW~1%` V}NbuvDB@ 'anG:= /* lR6x3C
H@ **FileAccess.java pQ<Y:-`c *//文件访问(定位,写) az|N-?u package NetFox; 5j-YM import java.io.*; _Z,\Vw:\F ^Zy%fv, *~j@*{u public class FileAccessI implements Serializable{ Vr1<^Ib (41|'eB\\ //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 ^4Ah_U RandomAccessFile oSavedFile; 9Ly]DZ;L long nPos; qH 6>!=00 L4|`;WP Z@@K[$ public FileAccessI() throws IOException usL*
x9i { f[^Aw(o this("",0); 84 pFc;< } =+MPFhvg! .JiziFJ@mj M6-&R=78K public FileAccessI(String sName,long nPos) throws IOException x`IEU*z# { ([LSsZ]sj oSavedFile = new RandomAccessFile(sName,"rw"); 4u47D$= this.nPos = nPos; ["e3Ez oSavedFile.seek(nPos); U\<?z Dw } 7y@Pa&^8 WYYa/,{9. )$bS}. public synchronized int write(byte[] b,int nStart,int nLen) do+.aOC { @)&=% int n = -1; n%s]30Xs try{ "?I y (*^ oSavedFile.write(b,nStart,nLen);
2WVka n = nLen; (<oyN7NT } ?r 2` Q catch(IOException e) LRG6:& { pWsDzb6?% e.printStackTrace (); fG(SNNl+D } TNh1hhJ$b #PQB(=299P BC<^a )D= return n; \:ak '' } |(LZ9I dg"3rs /?A J9iy } 8j %Tf; o/Q;f@ !pdb'*,n /* O[)kboY **SiteInfoBean.java 5m(^W[u ` */ Q &K package NetFox; rOOT8nkR# b4ONh% A_5P/ARmI public class SiteInfoBean { 0h\smqm -Z
Ugx$ ndz]cx private String sSiteURL; //Site's URL vucxt }Ti private String sFilePath; //Saved File's Path Om@C
X<(9C private String sFileName; //Saved File's Name :GP]P^M;G@ private int nSplitter; //Count of Splited Downloading File ApV~(k)W Uu(SR/R} V<uR>TD( public SiteInfoBean() z] ?N+NHOA {//nSplitter的缺省值为5 l6 H|PR{ //default value of nSplitter is 5 \(Y\|zC'0$ this("","","",5); {I #]@, } mFaZio0GK D(RTVef ^y1j.M@q public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) (/j/>9iro { T
iiW p!mX sSiteURL= sURL; H>B&|BO_[ sFilePath = sPath; {Um)15K sFileName = sName; wlk4*4dKn this.nSplitter = nSpiltter; (HE9V] 5Qn
' ssRbhlD/*1 } E:}r5S)4 Ww%=1M]e- nV:LqF= public String getSSiteURL() 4$S;( { ~h85BF5 return sSiteURL; q~ZNd3O } ?!cvf{a QpA/SmJ 71gT.E public void setSSiteURL(String value) $5<#n@
{ $#S&QHyEe sSiteURL = value; b+6\JE^Mz } A
'5,LfTu DYxCQ
D v+`N*\J_ public String getSFilePath() pDIVZC { vchm"p?9) return sFilePath; uPG4V2 } 2fR02={- 2Mmz %S'd khrb-IY@ public void setSFilePath(String value) s,=i_gyPQ { orfO^;qTY sFilePath = value;
!0@Yplj } U4-g^S[ ZUR6n>r D.Q=]jOs public String getSFileName() M#VE ]J { /ZPyN<@ return sFileName; `~Zs0 } QQ ~- @&:ar DV-;4AxxRq public void setSFileName(String value) 0#&5.Gr) { -
'W++tH= sFileName = value; uv(Sdiir8 } -Sx\Xi"<o= 7~aM=8r Vz)`nmO}5\ public int getNSplitter() #Xb+`' { &<J[Q%2 return nSplitter; Uo>]sNP~ } 2hkRd>)&5 5>j)kx=J9 i9A+gtd public void setNSplitter(int nCount) TAF
PawH { h`k"A7M nSplitter = nCount; /[)qEl2]K } 6&l+0dq } rIhl.5Y i2(1ki/|O s,n0jix@ /* `gb5"`EZ **Utility.java ez^@NK */ %S nd\ package NetFox; #Av.iAs ;@Z#b8aM} (B_\TdQ public class Utility { "xHg qgFyO ;)e2@'Agl D-(w_$# public Utility() 3G~@H>j { Z1Z1@2 T h!ZV8yMc >W`4aA } oifv+oY B'EKM)dA //线程睡眠 /)(#{i* public static void sleep(int nSecond) ;Tc`}2 { xs:n\N try{ <**y !2 Thread.sleep(nSecond); ~UjGSO)z} } uYil ?H{kH catch(Exception e) nwaxz>; { ]=";IN:SU e.printStackTrace (); GBFtr } [7S} g } dW~*e2nq j;3[KLmuK% //日志 o1Q7Th public static void log(String sMsg) fasgmi} { FE!lok System.err.println(sMsg); sHl>$Qevz } 3?Pn6J{O #ap9Yoyk\ WT`4s public static void log(int sMsg) ixQJ[fH10 { XWs"jt System.err.println(sMsg); pV,P|>YTf } GJp85B!PlO } qfz 8jY] xD[Gq% oK%K}{` /* hcbv;[bG **TestMethod.java A\#P*+k 0 */ jR#~I@q^ package NetFox; dwd:6.J( P*Tx14xe4 {aJJ`t public class TestMethod { >Ll$p0W @wC5 g 4E i'wAE:Xe public TestMethod() /'DsB%7g { ///xx/weblogic60b2_win.exe YH_7=0EJ try{ -!L"') SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); X'% ;B //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); QZhjb SiteFileFetch fileFetch = new SiteFileFetch(bean); g
HbxgeL fileFetch.start(); 6]pX>Xho } Y.U[wL> catch(Exception e){e.printStackTrace ();} T%n2$ {Gw.l." Xy &uZ } V-r3-b <u:WlaS M7+h(\H]2 public static void main(String[] args) &o97u4xi { 3lq Mucr new TestMethod(); TkO[rAC } 4bJZmUb } Mz;[ +p 点击下载更多相关资料
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