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/* y(h"0A1lW **SiteFileFetch.java 0>)F+QC */ 2}jC%jR2 package NetFox; xI(Y}> import java.io.*; Yo;Mexo! import java.net.*; l~c# X3E U t'r^ ]B>g~t5J public class SiteFileFetch extends Thread { ERZWK d<+@cf_9 {&d )O SiteInfoBean siteInfoBean = null; //文件信息Bean `;\~$^sj} long[] nStartPos; //开始位置 E
(bx/f long[] nEndPos; //结束位置 VSW"/{Lp FileSplitterFetch[] fileSplitterFetch; //子线程对象 DfV'1s4y long nFileLength; //文件长度 >{@:p`* boolean bFirst = true; //是否第一次取文件 {u{8QKeC boolean bStop = false; //停止标志 jz"-E File tmpFile; //文件下载的临时信息 `d6,]' DataOutputStream output; //输出到文件的输出流 .:V4> To@77.' //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) 6BIr{SY public SiteFileFetch(SiteInfoBean bean) throws IOException }hA h'*( { fNaboNj[ siteInfoBean = bean; E{W(5.kb;i //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); ]?A-D,!( tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); F
uJ=]T if(tmpFile.exists ()) SJXP}JB_ { Mv#\+|p 1x bFirst = false; tX
3y{W10" read_nPos(); A&/VO$Y9wp } IBSoAL else mj_V6`m4 { 6V^KOG nStartPos = new long[bean.getNSplitter()]; oES4X{, nEndPos = new long[bean.getNSplitter()]; ST7Xgma- } z;+LU6V cNvh2JI zPt0IB_j' %y_AT2A } F`U
YgN #xTu { q;#:nf" public void run() %;qDhAu0 { f$p7L.d< //获得文件长度 T$r?LIa ,Q //分割文件 qbu5aK}+ //实例FileSplitterFetch `R{ ZED
l' //启动FileSplitterFetch线程 7$jO3J //等待子线程返回 ):pFI/iC try{ V07? sc< if(bFirst) 1H]E:Bq { B#Z-kFn@ nFileLength = getFileSize(); ]n$&|@ if(nFileLength == -1) 9_I#{? { <N}*|z7=b System.err.println("File Length is not known!"); ![CF
>:e } ! tPHT else if(nFileLength == -2) o dTg.m { gt{$G|bi System.err.println("File is not access!"); 'W]oQLD^R } |{JJ2c\W else Qb~&a1&s# { ?QfomTT for(int i=0;i<nStartPos.length;i++) !|`vW{v { ;OD+6@Sr nStartPos = (long)(i*(nFileLength/nStartPos.length)); SF?s^ } 3&ES?MyB# for(int i=0;i<nEndPos.length-1;i++) IQA<xqX { ;$>wuc'L nEndPos = nStartPos[i+1]; ;_<K>r* } gP 6`q nEndPos[nEndPos.length-1] = nFileLength; c0M>CaKD } J0a#QvX! } "Ir.1FN Mh;rhQ g1zX^^nd,V //启动子线程 "}'Sk( fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; Q]NGd 0 J for(int i=0;i<nStartPos.length;i++) ^tY$pPA { 96.Vm*/7 fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), 5*31nMP\ siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), cAAyyc"yJ nStartPos,nEndPos,i); wc6v:,& Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); qc6eqE fileSplitterFetch.start(); EU@XLm6 } 2W]y9)<c // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), Q1(6U6L siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); Vuu_Sd // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", 5xF R7%_& nEndPos = " + nFileLength); 'YUx&FcM // fileSplitterFetch[nPos.length-1].start(); sM8 AORd vhaUV#V" zgR@-OtFZ //等待子线程结束 }2-p=Y:6 //int count = 0; *UlL\ //是否结束while循环 VG+WVk boolean breakWhile = false; >W[#-jA_Z sB>ZN3ptH^ YMEI
J} while(!bStop) ,H+LE$= { &}/h[v_#' write_nPos(); oy!Dm4F Utility.sleep(500); %/(>>*}Kw| breakWhile = true; \r+8}8 G
oJ\6&" bu|ecv for(int i=0;i<nStartPos.length;i++) sBfPhBT| { en6oFPG if(!fileSplitterFetch.bDownOver) L4,Ke { /n|`a1! breakWhile = false; F9&ae*>, break; ={a_?l% } m;]glAtt } ,J0BG0jB^u if(breakWhile) wRi` L7 break; j/9Uf|z-_ K@PQLL#yJp :x<'>)6 //count++; kW=GFj)L //if(count>4) r+WY7'c // siteStop(); >S:>_&I`I } CN"hx-f ugI9rxT]Kv Xu8_ <% System.err.println("文件下载结束!"); h&4f9HhS= } -n `igC catch(Exception e){e.printStackTrace ();} HRY?[+ } CL-mt5Kx#7 {,aI0bw; 7>`VZ? //获得文件长度 g,
%xGQ4+ public long getFileSize() HX3R@^vo { <Y9xHn& int nFileLength = -1; Uc3-n`C try{ URFp3 qE URL url = new URL(siteInfoBean.getSSiteURL()); =NHzh! HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); =(~UK9` httpConnection.setRequestProperty("User-Agent","NetFox"); h^D]@H -^sbf. 9(/ ;Wutj" int responseCode=httpConnection.getResponseCode(); Z $? Ql@M if(responseCode>=400) YIQm;EEG { 8,,$C7"EP processErrorCode(responseCode); 9O+><x[i return -2; //-2 represent access is error 7.o:(P1??g } R]7-6 6O>GVJbw fiq4|!^h String sHeader;
]OZk+DU: %;E/{gO p(F}[bP for(int i=1;;i++) BF_R8H,<% { RG)!v6 //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); @ KhDQ0v]5 //Utility.log(in.readLine()); a JC, sHeader=httpConnection.getHeaderFieldKey(i); +hIStA if(sHeader!=null) }!i#1uHUH: { w<hw>e^. if(sHeader.equals("Content-Length")) KKd Sh1 { )-_]y|/D:r nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); OeuM9c{ break; WUM&Lq
k" } %U&O
\GB } {/C
\GxH+ else 5xm^[o2#y break; }T?0/N3y& } V #0F2GV<, } pb(YA/ catch(IOException e){e.printStackTrace ();} 3U<\s=1?X catch(Exception e){e.printStackTrace ();} &;%z1b>F o
26R] 0Jh^((i* Utility.log(nFileLength); 1XAXokxj Gyak?.@R :K ^T@F5n return nFileLength; =7JvS~s } s0 ZF+6f J2$L[d^ +P?!yH,n //保存下载信息(文件指针位置) >[=fbL@N<@ private void write_nPos() ^
2"r't { nVF?.c try{ Dk!;s8}*c output = new DataOutputStream(new FileOutputStream(tmpFile)); JM-spi o output.writeInt(nStartPos.length); cY|?iEVs) for(int i=0;i<nStartPos.length;i++) R&cOhUj22J { 37hs/=x // output.writeLong(nPos); R#ABda9 output.writeLong(fileSplitterFetch.nStartPos); i(^&ZmG output.writeLong(fileSplitterFetch.nEndPos); B&~#.<23: } gAA2S5th output.close(); W0X/&v,k* } (j^Qa~{mG4 catch(IOException e){e.printStackTrace ();} sw.cw}1 catch(Exception e){e.printStackTrace ();} L>
ehL(]! } uES|jU{]b *OOi +/tNd2 //读取保存的下载信息(文件指针位置) @)A) cBv# private void read_nPos() 42a.@JbLQ { Wj"\nT4 try{ M]O
_L DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); "K3"s Ec% int nCount = input.readInt(); @l)HX'z0d nStartPos = new long[nCount]; 2D;,' nEndPos = new long[nCount]; w-%V9]J1 for(int i=0;i<nStartPos.length;i++) $4^cbk { =IQ+9Fl2 nStartPos = input.readLong(); q6h'=By nEndPos = input.readLong(); ~c&ygL3 } 3;@/`Z_\lt input.close(); 'OIOl } S+^*rw catch(IOException e){e.printStackTrace ();} %#xdD2oN catch(Exception e){e.printStackTrace ();} {sn RS)- } Z)?i&y? &Kuo|=f kdVc;v/5 private void processErrorCode(int nErrorCode) Zl5cHejM { dzIcX*" System.err.println("Error Code : " + nErrorCode); _MF:?p,l } 3*< O-Jr aDrF"j s}8(__| //停止文件下载 /5qeNjI+2 public void siteStop() !~+"TI}_%w { 'R&Y pR bStop = true; X]^FHYjhS for(int i=0;i<nStartPos.length;i++) BI\ )vr$ fileSplitterFetch.splitterStop(); ]JQ7x[ {BkTJQ) $#3O:aW } {}r#s> } : GVyY]qBU //负责部分文件的抓取 0E*q-$P **FileSplitterFetch.java q]%eLfC( */ Wpgp YcPS package NetFox; 0(!j]w"r3 ~#z8Q{!O b@GL*Z import java.io.*; Af~>}-`a import java.net.*; ObK-<kGcB ]mDsd* 1 {+`'ZU6C public class FileSplitterFetch extends Thread { vL>cYbJ< _[D6WY+
*C/bf)w String sURL; //File URL ,t"?~Hl". long nStartPos; //File Snippet Start Position =<,>dBs}\ long nEndPos; //File Snippet End Position ^HJvT)e4 int nThreadID; //Thread's ID p:*)rE boolean bDownOver = false; //Downing is over v:2*<; boolean bStop = false; //Stop identical DhN{Y8'~ FileAccessI fileAccessI = null; //File Access interface s(~tL-_ K xF:}a:c@H =ttvC"4? public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException G~z=,72 { K90wX1& this.sURL = sURL; PxuE(n V[ this.nStartPos = nStart; 5k%GjT this.nEndPos = nEnd; D8Ntzsr6 nThreadID = id; Ll"
Kxg fileAccessI = new FileAccessI(sName,nStartPos);//定位 >XTDN } ,\YlDcl':0 <+7]EwVcn^ BHmmvbM#Qm public void run() qDG{hvl[1r { Pu|PIdu!08 while(nStartPos < nEndPos && !bStop) (R'GrN> { mEL<d,XhI .<#oLM^
yf >
rG try{ d-GU164 URL url = new URL(sURL); $&fP%p HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); 7D5[
L httpConnection.setRequestProperty("User-Agent","NetFox"); ;kW+ String sProperty = "bytes="+nStartPos+"-"; f*Z8C9) httpConnection.setRequestProperty("RANGE",sProperty); OTgctw1s Utility.log(sProperty); cSbyVC[r HPGIz!o V/p+Xv(Zt InputStream input = httpConnection.getInputStream(); c(@(j8@S //logResponseHead(httpConnection); _wp>AJ r xqZZ(jZ }PC_qQF byte[] b = new byte[1024];
a ~ int nRead; !?AgAsSmc while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) U?@ s`. { FfeX;pi nStartPos += fileAccessI.write(b,0,nRead); D8OW|wVE //if(nThreadID == 1) 71S~*"O0f // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); <0EVq8h } *5e"suS2 ~__r-z cDkq@H: Utility.log("Thread " + nThreadID + " is over!"); <\44%M"iC- bDownOver = true; V(lxkEu/Fj //nPos = fileAccessI.write (b,0,nRead); 3^jkd)xw } [9<c;&$LU catch(Exception e){e.printStackTrace ();} J Wh5gOXd } +#;t.&\80N } ^ gy"$F3{` be<7Vy]j hFW{qWP //打印回应的头信息 J!\Cs1!f public void logResponseHead(HttpURLConnection con) ]'.D@vFGO { 4](jV}Hg for(int i=1;;i++) =&_Y=>rA]0 { A$JL"~R String header=con.getHeaderFieldKey(i); .RazjXAY if(header!=null) j7(S= //responseHeaders.put(header,httpConnection.getHeaderField(header)); EPd9'9S Utility.log(header+" : "+con.getHeaderField(header)); )ajF ca@v else h!~Qyb>W break; v=pkze } bZ5cKQ\6 } 6E^h#Ozl
9 BN_I#8r nB|m!fi< public void splitterStop() KbXENz&C { 4MFdhJoN bStop = true; IPVD^a? } 3+<f7 r(ZMZ^ cv=H6j]h| } 6L/` j7XUFA Il4R R /* 1B0+dxN` **FileAccess.java ["u:_2!4P *//文件访问(定位,写) j}`XF?2D package NetFox; VYo2m import java.io.*;
+|w%}/N m=4hi(g LykB2]T public class FileAccessI implements Serializable{ >)j`Q1Qc\ rOo|.4w //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 up;^,I RandomAccessFile oSavedFile; 0en
Bq>vr long nPos; _xmS$z)TO `Eg~;E: =C(((T. public FileAccessI() throws IOException g7l?/p[n { /8O;Q~a this("",0); UhX)?'J } Zk+c9, q `9`T,uJe _'}Mg7,V public FileAccessI(String sName,long nPos) throws IOException q; ?Kmk { 9Qb6ek oSavedFile = new RandomAccessFile(sName,"rw"); l+r3|b this.nPos = nPos; ;CtTdr oSavedFile.seek(nPos); r.ib"W#4 } U)JwoO H/^t]bg, sK/Z'h{| public synchronized int write(byte[] b,int nStart,int nLen)
/D>G4PP< { n8.Tag(# int n = -1; K/l*Saj try{ >Tp`Kri oSavedFile.write(b,nStart,nLen); 2[X\*"MQ2 n = nLen; G_E \p%L>] } "nA~/t= catch(IOException e) kQ99{lH,5 { &~&oB;uR e.printStackTrace (); cna/?V } 8#ZF<BY ukDaX 2{9%E6%# return n; 2]V&]s8Wi= } DyCnL@ >9+h2B
(hi{i } 0..]c-V(G 3Hi[Y[O`%P oIv\Xdc8 1 /* .FeVbZW **SiteInfoBean.java 2hf7F";Af */ O gtrp)x9 package NetFox; j2`%sBo /4YxB, H{,qw%.|KA public class SiteInfoBean { ^US ol/ >* h3u7t |0nt u+ private String sSiteURL; //Site's URL %hVI*p3 private String sFilePath; //Saved File's Path pC/13|I private String sFileName; //Saved File's Name aXgngwq private int nSplitter; //Count of Splited Downloading File 7U2?in}?Qi /_!Ed] +lhnc{;WJv public SiteInfoBean() /2x@Z> {//nSplitter的缺省值为5 U.pGp]\Q)G //default value of nSplitter is 5 >zV this("","","",5); ly::? } 6=p!`DOd h'"~t#r hH~GH'dnaE public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) 2v`Q;%7O { I\<)9`O sSiteURL= sURL; $6~t|[7:%Y sFilePath = sPath; P{2j31u` sFileName = sName; hiw>Q7W this.nSplitter = nSpiltter; |lMc6C B4eV $~< Hn}m}A } @y/!`Ziw 'B;n&tJ
Wg=q lux- public String getSSiteURL() YM&i { 9dwLkr return sSiteURL; jk{m8YP)E } ddwokXx
( Lt_A& (g3DI*Z public void setSSiteURL(String value) Ns$,.D { v<vaPvW sSiteURL = value; Xu7lV } ]Q -.Y-J/O z,g\7F[ ttY[\D&ZS public String getSFilePath() 9dFo_a*? { 3|(3jIa return sFilePath; 'iX y?l } d0 mfqP= IweNe`Z vu~7Z;y(<j public void setSFilePath(String value) ot,=.%O { Qov*xRO6 sFilePath = value; 4k)0OQeW6 } %(B6eiA ;umbld0 4ah5}9{g public String getSFileName() $msf~M* { br')%f}m return sFileName; rih@(;)1 } ?nwg.&P qT^0
%O: "4L_BJZ public void setSFileName(String value) lmYyaui { wPvYnhr|G- sFileName = value; `S|T&|ad0 } xTy)qN]P `8kL=%(h W?gelu] public int getNSplitter() lz4M)pL^ { @c=bH>Oz return nSplitter; Yb?(Q% } bd&Nf2 H^JFPvEc KeWIC,kq public void setNSplitter(int nCount) Ee^>Q*wahw { zYEb#*Kar nSplitter = nCount; <f;Xs( } y'_2|5!Qs } 0Vj!'=Ntv p:xVi0 w|:ev_c| /* #kp+e)F **Utility.java o`.5NUn */ %$F_oO7" package NetFox; `!C5"i8+i2 PoZxT-U FSb4RuD9 public class Utility { 6SEq 2 !H(V%B% F6Qnz8| public Utility() :Fi$-g { %t%D|cf `.F3&pA >
QK"r7f/ } ?&bB?mg\ <[V1z=Eo/] //线程睡眠 Ph17(APt,Q public static void sleep(int nSecond) CK8!7=>}^ { @O8X ) try{ V eLGxc Thread.sleep(nSecond); iZ 9ed]mf } ]JlM/ catch(Exception e) ldr~=<hsZ { AdWP e.printStackTrace (); Is>~ P*2Y= } U,V+qnS } *rmM2{6 S'=}eeG //日志 ft?c&h;At public static void log(String sMsg) V"8w:? { #,;Q|)AD:e System.err.println(sMsg); SA{5A 1 } ddw^oU G=&nwSL b5W(}ka+ public static void log(int sMsg) X{P=2h#g
{ } ^WmCX2a System.err.println(sMsg); j"n"=rTTQ } T]2= } 0xc|Wn> pQk@
+r =gHUY&sPu8 /* t>eeOWk3 **TestMethod.java Tb!jIe */ Rg 5kFeS package NetFox; #pk @k\npFKQm U&gI_z[ public class TestMethod { d8&T62Dnd4 j5G=ZI86y [p_<`gU? public TestMethod() 2 @t?@,c { ///xx/weblogic60b2_win.exe $J*lD-h- try{ @gk{wh>c SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); 4oN*J +"=+ //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); RAFdo SiteFileFetch fileFetch = new SiteFileFetch(bean); c1Hp fileFetch.start(); 4}Yn!"jW& } I[bWd{i: catch(Exception e){e.printStackTrace ();} af|x(:!H 41I2t(H @z $8>II0C. } wS+j^
;" [!U!
Z'i N_?15R7h public static void main(String[] args) >`I%^+z { HH|N~pBJB new TestMethod(); 5?8jj } o`{^ptu1q } apWv+A 点击下载更多相关资料
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