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/*
J7p?9 **SiteFileFetch.java >;+q,U} */ w:/QB-`% package NetFox; T[%@B" import java.io.*; yeIcQ% import java.net.*; vQmqYyOc2 :Hj #1-U z?
Ck9 public class SiteFileFetch extends Thread { PH>`//D%n? b}J,&eYD @6%o0p9zz SiteInfoBean siteInfoBean = null; //文件信息Bean gXe`G(w long[] nStartPos; //开始位置 C=&;4In long[] nEndPos; //结束位置 FY"csZ FileSplitterFetch[] fileSplitterFetch; //子线程对象 u1ahAk7 long nFileLength; //文件长度 ]}L tf,9 boolean bFirst = true; //是否第一次取文件 }Apn.DYbbf boolean bStop = false; //停止标志 [ps5 File tmpFile; //文件下载的临时信息 A$-\Er+f DataOutputStream output; //输出到文件的输出流 V;uFYt;E DeTLh($\ //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) t4<+]]
public SiteFileFetch(SiteInfoBean bean) throws IOException 9{8xMM- { nx@,oC4 siteInfoBean = bean; <ToRPx&E //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); U &RZx&W tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); gbziEjRe if(tmpFile.exists ()) @.} @K { nJY3 1(p bFirst = false; !7Nz_d~n read_nPos(); c{[ lT2yxU } v$#l]A_D else R7/ET" { i!yE#zew nStartPos = new long[bean.getNSplitter()]; 9*2^2GR^; nEndPos = new long[bean.getNSplitter()]; IGF25-7B } Q:8t1ZDo E<\\/Q%w , FR/X/8 id[caP=` } ei(S&u< yaYJmhG =Y5_@}\0 public void run() GezMqt;2 { %|'Vuc Lx //获得文件长度 ]E^)d|_ //分割文件 8/R9YiY5* //实例FileSplitterFetch Dq+S'x~> //启动FileSplitterFetch线程 v\D.j4%ij //等待子线程返回 Y|E rVf4 try{ :ZadPn56 if(bFirst) 8wMwS6s: { FT\%=>{ nFileLength = getFileSize(); CIj7'V if(nFileLength == -1) p#6tKY;N { +!)_[ zo System.err.println("File Length is not known!"); GOD{?#c$ } f<M!L>+M6 else if(nFileLength == -2) i?f;C_w { L| ;WE= System.err.println("File is not access!"); K9ek } *z&hXYm else [DvQk?,t { yz=aJ
v;
H for(int i=0;i<nStartPos.length;i++) \LM.>vJ { }^2'@y!( nStartPos = (long)(i*(nFileLength/nStartPos.length)); N v6=[_D } ~l]g4iEp for(int i=0;i<nEndPos.length-1;i++) (XEJd4r { -6$GM J7 nEndPos = nStartPos[i+1]; 3sp-0tUE } `%*`rtZ+H. nEndPos[nEndPos.length-1] = nFileLength; n?"("Fiw } 'xGTaKlm, } tac\Ki? ~SS3gL v gv1y%(`|n( //启动子线程 .-)kIFMi fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; zbj V>5 for(int i=0;i<nStartPos.length;i++) ?C']R(fQ\ { g} pD% fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), }s[`T siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), e m nStartPos,nEndPos,i); $g),|[x+( Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); WEtPIHruyt fileSplitterFetch.start(); HlEHk' } J?Oeuk~[D // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), -q\Rbb5M siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); U$;UW3- // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", ]n3!%0]\ nEndPos = " + nFileLength); J$lfI^^ // fileSplitterFetch[nPos.length-1].start(); 45&Rl,2 zbgGK7 d4p6.3 //等待子线程结束 =}YX I //int count = 0; 6";
ITU^v //是否结束while循环 |
^G38 boolean breakWhile = false; )S;3WnQ) MGY0^6yK5 )_Z^oH ]< while(!bStop) u60RuP& { M6GiohI_"P write_nPos(); zrf
tF2U Utility.sleep(500); wD4[UU? breakWhile = true; zRbY]dW JKy~'>Q (4#iLs for(int i=0;i<nStartPos.length;i++) ;#9ioGx { =3!o_ if(!fileSplitterFetch.bDownOver) Ubgn^+AI { O<E8,MCA[a breakWhile = false; \0vs93>? break; tG ZMIG_ } Cy)N hgz } e\O-5hp7 if(breakWhile) Ay PtbrO break; $/|vbe, jw`05rw: BMdZd5!p& //count++; ^bP`Iv //if(count>4) 57=d;Yg e // siteStop(); -y{(h%6 } g[bu9i *,IK4F6>: T]nAz<l), System.err.println("文件下载结束!"); P$Oj3HD LM } paLPC&G catch(Exception e){e.printStackTrace ();} *C<;yPVc } lfre-pS+ 5-y*]:g( W)J MV //获得文件长度 =,h'}(z_ public long getFileSize() Dh}(B$~Oz+ { 6B|i-b$~ int nFileLength = -1; vZ811U~} try{ L#uU.U= URL url = new URL(siteInfoBean.getSSiteURL()); x)GheM^ HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); &1R#!|h1W httpConnection.setRequestProperty("User-Agent","NetFox"); 9x|`XAB @d^Z^H*Yv MtaGv#mJ int responseCode=httpConnection.getResponseCode(); P/.<sr=2 if(responseCode>=400) miu?X ! { ^X}r ^ processErrorCode(responseCode); vSC1n8 / return -2; //-2 represent access is error DBL@Mp[< } *YL86R+U s\pukpf@ q7f`:P9~ String sHeader; 2[HPU M2> ,[zSz8R J"LLj*,0" for(int i=1;;i++) RL/y7M1j { BV:Ca34& //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); IZ7o6Etti //Utility.log(in.readLine()); Nw$OJ9$L>
sHeader=httpConnection.getHeaderFieldKey(i); [DH4iG5 if(sHeader!=null) )E*f30 { NsP=l] if(sHeader.equals("Content-Length")) !%ju.Xs8 { t!*[nfR nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); GWWg3z.o"W break; peBHZJ``RX } c:u*-lYmK% } <%Nf"p{K else 0NGth(2 break; GIH{tr1:< } W"\}## } 7@%qm|i>w catch(IOException e){e.printStackTrace ();} =eUKpYI
catch(Exception e){e.printStackTrace ();} 6XF Ufi+ R20 .dA_N t;6<k7h Utility.log(nFileLength); vj%"x/TP v_EgY2l( \} v@!PQl return nFileLength; 5L[imO M0 } 41<h|WA n=V|NrU *3fl}l //保存下载信息(文件指针位置) &)tiO>B^6 private void write_nPos() $<nRW*d { oo\^}jb try{ L%/>Le}VX output = new DataOutputStream(new FileOutputStream(tmpFile)); Os'E7;:1h output.writeInt(nStartPos.length); py:L-5 for(int i=0;i<nStartPos.length;i++) 1C{0 R. { oSD=3DQ; // output.writeLong(nPos); `e<IO_cg output.writeLong(fileSplitterFetch.nStartPos); Gg9s.]W output.writeLong(fileSplitterFetch.nEndPos); qsW&kW~ } ?V8Fgd output.close();
wg%Z } mc%.
8i catch(IOException e){e.printStackTrace ();} Z9$pY=8^? catch(Exception e){e.printStackTrace ();} `WOoC } 7;q0'_G GqL&hbpi Ft11?D
B //读取保存的下载信息(文件指针位置) Zt!$"N., private void read_nPos() <Hr<QiAK { [-VH%OM try{ H!]&"V77 DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); 8|)!E`TKSV int nCount = input.readInt(); r4/b~n+* nStartPos = new long[nCount]; A?#i{R nEndPos = new long[nCount]; jFdgFKc) for(int i=0;i<nStartPos.length;i++) H"? 5]!p { ,+`r2}N
\/ nStartPos = input.readLong(); _]o7iqtv nEndPos = input.readLong(); onSt%5{P%X } [k\VUg:P input.close(); ,Ohhl`q( } KBtqtE'(L catch(IOException e){e.printStackTrace ();} @NA+Ma{N catch(Exception e){e.printStackTrace ();} ;%2+Tc-7I } $7Hwu^c( lhYJectJa #M!$CGi ( private void processErrorCode(int nErrorCode) ffL]_E { eC"e
v5v System.err.println("Error Code : " + nErrorCode); ~3j+hN8< } )uHat# yJC:
bD1xi faRQj:R8 //停止文件下载 cQ- #] public void siteStop() 6/L[`n"G { cI8\d 4/py bStop = true; c!6v-2ykv for(int i=0;i<nStartPos.length;i++) -{OJM|W+ fileSplitterFetch.splitterStop(); (Ud"+a [DjlkA/Zg n^;-& } >g!$H}\ } Dz~^AuD6 //负责部分文件的抓取 paV1o>_Rd **FileSplitterFetch.java >ph=?MKD */ .jP|b~ package NetFox; U9`Co&Z2 .$cX:"_Mk OCdX'HN5Y import java.io.*; 2
oL$I(83 import java.net.*; I_8 n>\u IxWi>8
j7g>r/1eE public class FileSplitterFetch extends Thread { J)Yz@0#T(; bz nMD X{cB%to String sURL; //File URL q/*veL long nStartPos; //File Snippet Start Position ]lGkZyUhI long nEndPos; //File Snippet End Position ]]r;}$ int nThreadID; //Thread's ID `dX0F=Ag? boolean bDownOver = false; //Downing is over ux^rF boolean bStop = false; //Stop identical Ew.6y=Ba FileAccessI fileAccessI = null; //File Access interface w8q
2f-K- eVMnI yr ^2BiMH3j public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException GBS+ 4xL| { vD#kH1 this.sURL = sURL; imM#zy this.nStartPos = nStart; NoF|j57?u' this.nEndPos = nEnd; k fY; nThreadID = id; vAG|Y'aO@% fileAccessI = new FileAccessI(sName,nStartPos);//定位 % mPv1$FH } 6:QlHuy0nH fS'` 9 N@X6Z!EO public void run() ODRy { _Hx'<%hhI while(nStartPos < nEndPos && !bStop) w?"M { ]!"7k_ }vP(SF6 =s.0 f:( try{ mIrN~)C4\ URL url = new URL(sURL); W"\`UzOLQ HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); ]T5\LNyN httpConnection.setRequestProperty("User-Agent","NetFox"); 2V; Dn$q String sProperty = "bytes="+nStartPos+"-"; 2Gj)fMK38 httpConnection.setRequestProperty("RANGE",sProperty); W4P\HM>2 Utility.log(sProperty); *e:I*L \AI-x$5R* /i_FA]Go InputStream input = httpConnection.getInputStream(); fO#nSB/
8 //logResponseHead(httpConnection); 9RSviIi$ /Trbr]lWy b!J?>du byte[] b = new byte[1024]; * _usVg int nRead; /={N^8^=x while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) SuI^8^f= { %)d7iT~M nStartPos += fileAccessI.write(b,0,nRead); }[c.OJ:
//if(nThreadID == 1) i;qij[W. z // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); g^po$%I ' } &>Z;>6J, :T@} CJ g%ys| Utility.log("Thread " + nThreadID + " is over!"); jc!V|w^ bDownOver = true; iW9 //nPos = fileAccessI.write (b,0,nRead); nu|,wE!i } M djxTr^ catch(Exception e){e.printStackTrace ();} =l]
lwA- } )L":I } [T[]U ;>5]KNj
W"t^t|H'~ //打印回应的头信息 \j.l1O public void logResponseHead(HttpURLConnection con) >s.y1Vg~C { d mTZEO for(int i=1;;i++) F]<2nb7 { ,5T1QWn^f String header=con.getHeaderFieldKey(i); Tgla_sMb if(header!=null) *].qm
g% //responseHeaders.put(header,httpConnection.getHeaderField(header));
Bw+?MdS Utility.log(header+" : "+con.getHeaderField(header)); R S>qP;V*- else 4}*.0'Hz break; 3-Xd9ou } S|6i]/ } q^ &r<i NP4u/C< z7P~SM public void splitterStop() S
{+Z.P { KCp9P2kv. bStop = true; BbL]0i } /m^G 99N 3U!=R- 1IT(5Mleb } ~oK0k_{~ <{YzmN\Z n`jG[{3t& /* JnqP`kYbTE **FileAccess.java 0$=U\[og *//文件访问(定位,写) 'w<^4/L Q package NetFox; \;Q!}_ K import java.io.*; <7L-25 = 4?
rEO(SZ :v$)Z~ public class FileAccessI implements Serializable{ z/p^C~|} 3rJ LLYR //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 i],~tT|P RandomAccessFile oSavedFile; |942#rM long nPos; v:9'k~4) -H|!KnR 376z~ public FileAccessI() throws IOException eE;j#2SEO { &%(SkL_] this("",0); _~P&8 } L`9.Gf gv(MX
;B# 9JILK9mVO public FileAccessI(String sName,long nPos) throws IOException 1>2
/1> { >f1fvv6 oSavedFile = new RandomAccessFile(sName,"rw"); m0^~VK | this.nPos = nPos; "Wb KhE oSavedFile.seek(nPos); qa8?bNd'f } wM-H5\9n p=i6~ 6O0aGJ,H public synchronized int write(byte[] b,int nStart,int nLen) J^PFhu { hew"p( ` int n = -1; D+q z` try{ ,u-9e4 oSavedFile.write(b,nStart,nLen); 1C*mR%Q n = nLen; "W9z>ezp } 2$o\`^dy catch(IOException e) !#e+!h@ { :gRVa=}= e.printStackTrace (); 43rV> W, } *#?9@0b@ >-w#&T &K iVmy|ewd return n; ;.R)
uCd{= } I58$N+# 3mg:9]X9 *Z2Ko5&Y2 } E7B?G3|z3 z|(<Co8#. Vk[M .=J /* fZnq5rTk" **SiteInfoBean.java EEx:Xk%5hX */ M}=>~TA@ package NetFox; cveQ6
-`K %):pfM;b N'pYz0_H public class SiteInfoBean { VT#`l0I} zq3f@xOK NJQy*~P private String sSiteURL; //Site's URL $}us+hGZ private String sFilePath; //Saved File's Path hVd_1|/X private String sFileName; //Saved File's Name
u6MU
@? private int nSplitter; //Count of Splited Downloading File )?6%d f9d{{u rD !GEU public SiteInfoBean() w2lO[o~x} {//nSplitter的缺省值为5 z('t#J!b //default value of nSplitter is 5 `/B+ this("","","",5); qc';< } 4#ikdjB; BV}sN{ ?<Mx* l public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) 'tX}6wurf { M+lr [,c sSiteURL= sURL; QDKY7"H sFilePath = sPath; y!q`o$nK sFileName = sName; 4|4[3Ye7u: this.nSplitter = nSpiltter; 0eK>QZ_ jTW8mWNk] jQBn\^w } {V8uk$ f=8{cK0j u4 ~.[3E* public String getSSiteURL() W?[
C
au- { /2tPd return sSiteURL; >?ec"P%vS/ } \pP1k.~UnC nu2m5RYx Q6N?cQtOT public void setSSiteURL(String value) *,=8x\Shp { x]4>f[>*> sSiteURL = value; /R>YDout} } [Ov/&jD" z$M-UxY AWAJ*6Z public String getSFilePath() )XoMOz { n{M-t@r7 return sFilePath; O2U}jHsd } `v'yGsIV !:}m-iqQ1 g(G$*#}o8A public void setSFilePath(String value) _'n]rQ' { Rh)%; sFilePath = value; dh%DALZ8t } 6:?mz;oP QcjsQTAbk %Z-xh<& public String getSFileName() SEE:v+3| { +k/=L9#e return sFileName; GXRW"4eF5 } _3#_6>=M :Smyk.B2! rMw$T=Oi public void setSFileName(String value) :lK8i{o { vZ^U]h V sFileName = value; abS3hf } 0w vAtK|Q 8I<j"6`+Q Z&7Yl(| public int getNSplitter() I$XwM { Y@ vC!C return nSplitter; Fzn! } 7I;0%sVQ{ !Y/S 2J <UTO\w% public void setNSplitter(int nCount) $if(n|| { kUr/*an nSplitter = nCount; kxmsrQ>av } 8Au W>7_ } }%^ 3 1Ve~P"w [@]i_L[ /* *?>52 -&b **Utility.java Pu 'NSNT */ zz8NBO package NetFox; (UTA3Db /J(~NGT -U\s.FI.AR public class Utility { - rI4_Dl 42:,*4t( |3hNTH? public Utility() def\=WyK { m\_v{1g %/S HB =Ew77 } `7.$
A U [ fs.D / //线程睡眠 hZ')<@hNP public static void sleep(int nSecond) x1"8K { M<SV H_ try{ 1bjWWNzQA Thread.sleep(nSecond); ):n'B` f}z } gf^y3F[\ catch(Exception e) PtGFLM9R { 4E$d"D5]>p e.printStackTrace (); }*vE/W } AXv-%k}; } BHU=TK@GR |EY1$qItid //日志 Ql,WKoj* public static void log(String sMsg) q#"lnc<S { [}}q/7Lp System.err.println(sMsg); w BoP&l } &gI*[5v
2;w> w#}> r&~]6
U public static void log(int sMsg) s=Kz9WLy { n-1 System.err.println(sMsg); 29&F_ } a|k*A&5u2 } 4y$okn\}i O@skd2 s~c cx"HH /* M7YbRl **TestMethod.java ?ea5k*#a */ n>)h9q S package NetFox; Gq7\b({= m]}EVa_I`/ V}JBv$+ko public class TestMethod { +KOhDtLMG th5UzpB4 g3Ul'QJ public TestMethod() %2^V.`0T { ///xx/weblogic60b2_win.exe Ym$`EN try{ :zpT Gk8Z SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); `6PBV+]Vm3 //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); ^__P;Gr` SiteFileFetch fileFetch = new SiteFileFetch(bean); ]jR-<l8I- fileFetch.start(); ]
^J } JtF)jRB0, catch(Exception e){e.printStackTrace ();} g O8~$Aj |:`)sx3@# rY$wC% } BLm}mb#/{ \\Z?v,XsS x@x5|8:ga public static void main(String[] args) &0{&4, { _6]tbni?v new TestMethod(); U?Vik } 8rNf4]5@X( } "i!W(}x+ 点击下载更多相关资料
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