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/* yAU[A **SiteFileFetch.java 9b@L^]Kg */ 4wX{ N package NetFox; C<r7d [ import java.io.*; @ z#;O2 import java.net.*; `i8osX[ &p a~Sf~ka nj!)\U public class SiteFileFetch extends Thread { ~7Kqc\/H&I bENfEOf, =#&K\ SiteInfoBean siteInfoBean = null; //文件信息Bean hc5M)0d long[] nStartPos; //开始位置 &}nU#)IX long[] nEndPos; //结束位置 }5RfY| ; FileSplitterFetch[] fileSplitterFetch; //子线程对象 i^G/)bq long nFileLength; //文件长度 W*QD' boolean bFirst = true; //是否第一次取文件 `mQY%p| boolean bStop = false; //停止标志 ^uW](2 File tmpFile; //文件下载的临时信息 _YWw7q DataOutputStream output; //输出到文件的输出流 yX,2`&c l\-1W2 //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) 3uwu}aw public SiteFileFetch(SiteInfoBean bean) throws IOException 1Z'cL~9 { 9hHQWv7TgK siteInfoBean = bean; FviLlly6 //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); -TU7GCb= tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); Nb>|9nu
O if(tmpFile.exists ()) r[vMiVb { X, <l bFirst = false; W=j/2c/ read_nPos(); wp-5B= #:{ } )pjd*+V else S5@/;T { 9qIUBH e nStartPos = new long[bean.getNSplitter()];
$Tfq9 nEndPos = new long[bean.getNSplitter()]; ZwAX+0 } yHurt>8b[ j2cLb <P'^olQ },2-\-1 } DIB Az s =$}P'[V hmtRs]7 public void run() _U1~^ucV { W,`u5gbT //获得文件长度 J#L-Slav% //分割文件 u6'vzLmM //实例FileSplitterFetch @CP"AYB # //启动FileSplitterFetch线程 {:IOTy //等待子线程返回 GxLoNVr try{ 9r
fR if(bFirst) n!|K# { 4))u*c/, nFileLength = getFileSize(); 4};!nYey! if(nFileLength == -1) *#+d j" { @es}bKP System.err.println("File Length is not known!"); /"- k
;jz } $|C%G6!s?@ else if(nFileLength == -2)
yUq,9.6Ig { *ys@'Ai? System.err.println("File is not access!"); 5>t&)g } 79~,KFct else I}puN! { yv9~ for(int i=0;i<nStartPos.length;i++) d0>V^cB '? { UIv TC
S nStartPos = (long)(i*(nFileLength/nStartPos.length)); n4 KiC!*i0 } -WB?hmx for(int i=0;i<nEndPos.length-1;i++) ~2
T_)l? { G-G!c2o nEndPos = nStartPos[i+1]; Z_iu^Q } iv?'&IUfK nEndPos[nEndPos.length-1] = nFileLength; i6kW"5t } Y)N(uv6 } y rdJX ,cWO Ak F4k<YU //启动子线程 weT33O"!1 fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; >f^&^28 for(int i=0;i<nStartPos.length;i++) nUQcoSY# { J{@gp,&e fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), X;w1@4! siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), &{7n nStartPos,nEndPos,i); ::dLOf8o Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); `-D6:- ,w fileSplitterFetch.start(); ?#qA>:2, } ~4U[p 50 // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), '# "Z$ siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); C:hfI;*7 // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", >L$y|8O nEndPos = " + nFileLength); s^^X.z , // fileSplitterFetch[nPos.length-1].start(); F]
+t/ +#6WORH0S Eg3rbqM- 8 //等待子线程结束 YZ7rs]A //int count = 0; 5u:+hB //是否结束while循环 r4gkSwy boolean breakWhile = false; doFp53NhV %Wom]/&,' 3LG}x/l while(!bStop) EX>> -D7L { N$/{f2iC write_nPos(); A%"XN k Utility.sleep(500); Eof1sTpA breakWhile = true; "]LNw=S kNI m90,g 90k|W> for(int i=0;i<nStartPos.length;i++) enF.}fo] { hEl)BRJ if(!fileSplitterFetch.bDownOver) ?fXg_?+{'g {
p[0Ws460 breakWhile = false; $sU?VA'h break; |^S[Gr w } gET& +M } J,;;`sf if(breakWhile) 9*[!uu break; 3HO4h\mp DA]!ndJD K^J;iu 4 //count++; XEfTAW#7 //if(count>4) j*I0]!- // siteStop(); BC(f1 } ]g IXG` 7Hf6$2Wh u,PrEmy- System.err.println("文件下载结束!"); m,K\e } H5, {Z catch(Exception e){e.printStackTrace ();} =V"ags } 8!3+Obj @IB8(TZ5I To]WCFp6@ //获得文件长度 j6/ 3p|E public long getFileSize() {AO3o<-h { |QAmN>7U int nFileLength = -1; 8<^[xe try{ }.NR+:0 URL url = new URL(siteInfoBean.getSSiteURL()); 18}L89S> HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); ;1NZY.pyc httpConnection.setRequestProperty("User-Agent","NetFox"); ppR_y U>e@m? 3 V8SKBS int responseCode=httpConnection.getResponseCode(); _L_SNjA_ if(responseCode>=400) &m'O :ZS2 { PX?tD:,[- processErrorCode(responseCode); YCh!D dy return -2; //-2 represent access is error
9`{Mq9J } &VR<'^> J0@m
Ol +P~zn= String sHeader; To}L%) klT6?'S PgB=<#9 for(int i=1;;i++) 5G(y { 2EG"xA5% //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); bkmX@+Pe //Utility.log(in.readLine()); )09_CC!a sHeader=httpConnection.getHeaderFieldKey(i); ksu:RJ- if(sHeader!=null) `WWf?g { 4yQ4lU,r if(sHeader.equals("Content-Length")) VY=~cVkzS { ~ZG>n{Q nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); K._1sOw'"Y break; &|9mM=^ } r\@"({q}_- } /W:}p(>4a else Jfo|/JQ break; )lB-D;3[_ } |g8
]WFc } d>@{!c- catch(IOException e){e.printStackTrace ();} .a;-7|x catch(Exception e){e.printStackTrace ();} I #1_ * fSa8CV }9Y='+.%^ Utility.log(nFileLength); dam.D.o" U!3nn#!yE `dEWP;#cp return nFileLength; +(PtOo. } at7/KuY!~ YyK9UZjI +ZizT.$& //保存下载信息(文件指针位置) #g ~~zwx/N private void write_nPos() @{+*ea7M(` { ut3jIZ1] try{ wKk output = new DataOutputStream(new FileOutputStream(tmpFile)); .IF dJ output.writeInt(nStartPos.length); _qE2r^o"B for(int i=0;i<nStartPos.length;i++) <u->hT { b.YQN' // output.writeLong(nPos); k^R>x V
output.writeLong(fileSplitterFetch.nStartPos); ot_jG) output.writeLong(fileSplitterFetch.nEndPos); kZUuRB~om } ;1(OC-2>d output.close(); DgClN:Hw } fQOaTsyA catch(IOException e){e.printStackTrace ();} %6Hn1'7+v catch(Exception e){e.printStackTrace ();} Gps } 1;? L:A 'v6Rd)E\z pC5-,Z;8 //读取保存的下载信息(文件指针位置) `q$DNOrS private void read_nPos() +Tq
_n@ { %}'sFum` try{ F4bF&% R DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); <=A&y5o int nCount = input.readInt(); 3vrQY9H> nStartPos = new long[nCount]; eRVu/TY nEndPos = new long[nCount]; ~Ja>x`5 for(int i=0;i<nStartPos.length;i++) jVfC 4M7 , { 1/HPcCsHb nStartPos = input.readLong(); uA}asm nEndPos = input.readLong(); ZJR{c 5TE } yMo@ka=v input.close(); b#82G`6r } >V;<K?5B`W catch(IOException e){e.printStackTrace ();} !p0FJ].g, catch(Exception e){e.printStackTrace ();} @M,KA {e } Bm~>w`1wK ;uba !Y\hF|[z private void processErrorCode(int nErrorCode) HnOF_Twq { w`!Yr:dU System.err.println("Error Code : " + nErrorCode); _`D760q} } ef!I |.FW 2{U4wTu N3x}YHFF //停止文件下载 ^.-P]I] public void siteStop() rWbL_1Eq { JpSS[pOg bStop = true; d%]7: for(int i=0;i<nStartPos.length;i++) 3F X`dZ fileSplitterFetch.splitterStop(); N>]u;HjH ]'M4Unu#@ W@UHqHr:\ } ]}'WNy6c&x } EEkO[J[= //负责部分文件的抓取 !knYD}Rxd **FileSplitterFetch.java %>JqwMK */ v- {kPc=:# package NetFox; `P# h?tZ k]f73r OW #pBeX99 import java.io.*; Y61E|:fV! import java.net.*; F." L{g dFFB\|e;0 kV(?u_ R public class FileSplitterFetch extends Thread { BA-n+WCWJ
d]@9kG { ET+V String sURL; //File URL :;7q up long nStartPos; //File Snippet Start Position qa%g'sB-b long nEndPos; //File Snippet End Position CdEJ/G: int nThreadID; //Thread's ID %mxG;w$ boolean bDownOver = false; //Downing is over $}HSU>,% boolean bStop = false; //Stop identical W?6RUyMC$T FileAccessI fileAccessI = null; //File Access interface [q(7Jv $6Ty~.RP5H <m )@~s?D public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException :!r_dmJ { wz:w R+ this.sURL = sURL; i5_gz> this.nStartPos = nStart; d}WAP m this.nEndPos = nEnd; re^1fv nThreadID = id; u9GQ)`7Z@ fileAccessI = new FileAccessI(sName,nStartPos);//定位 .@[+05Yw } y<#y3M!\ -><?q t Y$,]~Qzq public void run() QTP1u { ?;i6eg17< while(nStartPos < nEndPos && !bStop) RS$:]hxd>_ { hVR=g!e#X X59~)rH, szKs9er& try{ x$A5Ved URL url = new URL(sURL); YSZz4?9\ HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); Ymn0?$,D1= httpConnection.setRequestProperty("User-Agent","NetFox"); 8ALYih7"W String sProperty = "bytes="+nStartPos+"-"; *_^AK=i httpConnection.setRequestProperty("RANGE",sProperty); nQ/El&{ Utility.log(sProperty); o#6j+fo!n `qr[0wM dc:|)bK
M InputStream input = httpConnection.getInputStream(); 8{h:z
9]J //logResponseHead(httpConnection); y~W6DL} -4V1s;QUZ ?MN?.O9- byte[] b = new byte[1024]; Bj\0RmVa1 int nRead; %tpt+N? while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) h#`qEK&u { %=_Iq\lC nStartPos += fileAccessI.write(b,0,nRead); #_Tceq5 //if(nThreadID == 1) .Cm wR$u& // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); ogQbST } B)Gm"bLCOZ [81k4kU Uu3[Cf=C Utility.log("Thread " + nThreadID + " is over!"); -i 6<kF-W bDownOver = true; WE=`8`Li //nPos = fileAccessI.write (b,0,nRead); RAxA H } 1?mQ
fW@G catch(Exception e){e.printStackTrace ();} Y&+<'FA } C' ny 2>uA } `Y$LXF~,Om o/9 V1" W\X51DrEx //打印回应的头信息 9C`Fd S public void logResponseHead(HttpURLConnection con) L$Ss]Ar= {
+mH Kk for(int i=1;;i++) f?
ko%c_p { *<BasP String header=con.getHeaderFieldKey(i); X hTp'2,] if(header!=null) ~>+}(%<, //responseHeaders.put(header,httpConnection.getHeaderField(header)); 0y6nMI Utility.log(header+" : "+con.getHeaderField(header)); 2MJ0[9 else $~U_VQIA^ break; yyBfLPXZ } 18|H } oIf-s[uH r@iGMJx$ 6Zkus20 public void splitterStop() rTK/WZs8 { unP7("A0D bStop = true; N?R1;|Z] } R3.tkFZq] 0oM~e }CQ GvH } iF<VbQP=X^ <A!v'Y i7Y96] /* MiS$Y **FileAccess.java C8aYg *//文件访问(定位,写) 4qiG>^h9 package NetFox; ]<{BDXIGIE import java.io.*; a0y;c@pkO 5\qoZs*e o6oZk0 public class FileAccessI implements Serializable{ Rl$NiY?2 ud!iy //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 y%3Yr?] RandomAccessFile oSavedFile; [@.%6aD long nPos; Qt!l-/flh uKhfZSx0w {3`9A7bG public FileAccessI() throws IOException ")cdY)14" {
{:'eH this("",0); ?%;)> :3N } m#DC;(Pn
\6nWt6M /sC$;l public FileAccessI(String sName,long nPos) throws IOException Z]"ktb;+[ { `2Ff2D^ ? oSavedFile = new RandomAccessFile(sName,"rw"); =yvyd0|35 this.nPos = nPos; 2hu;N oSavedFile.seek(nPos); :DQHb"( } (x#4BI}L9) ;^t<LhN: QH#|R92: public synchronized int write(byte[] b,int nStart,int nLen) @P[Tu; 4 { qnruatA int n = -1; 4l>/6LNMF try{ PNc^)|4^Q oSavedFile.write(b,nStart,nLen); m
{wMzsQ n = nLen; obS|wTG~ } iK'bV<V&7 catch(IOException e) \q%li) { H@5:x8 e.printStackTrace (); )2u=U9 } QvjsI;CQ- U0UOubA =f=MtH?0y return n; 9C3q4.$D } +7d%)t |.)dOk,o f;
>DM } 7S 1
Y) rEs,o3h?po 0|P RCq /* ,Q >u
N **SiteInfoBean.java zVJwmp^ */ xHe<TwkI package NetFox; uRwIxT2 {i`BDOaL Y <Ta2H public class SiteInfoBean { Yb6(KT fg+Q7'*Vq Z!7#"wO9+V private String sSiteURL; //Site's URL 8H3|^J private String sFilePath; //Saved File's Path ZrXvR`bsw private String sFileName; //Saved File's Name Ah)_mxK private int nSplitter; //Count of Splited Downloading File .B_)w:oF 3($%A GKJ :Y~fPke public SiteInfoBean() Y(W>([59 {//nSplitter的缺省值为5 RY&Wvkjh //default value of nSplitter is 5 ;' YM@n this("","","",5); ZGe+w]( } * t{A=Wk &*/8Ojv)9 7AHEzJh" public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) oq(um:m { Bp>%'L sSiteURL= sURL; L]9uY sFilePath = sPath; 9<}d98 sFileName = sName; C3hnX2"; this.nSplitter = nSpiltter; cAV9.VS<L 2*F["E _
B",? } } e*Sv}4e=. &ZClv"6 {&,a)h7& public String getSSiteURL() !7P 1%/ { V[uB0#Lp return sSiteURL; %}x/fq } r,!7TuBl c+Ejah+ -Q<3Q_ public void setSSiteURL(String value) ]?/[& PP, { G!L=W#{ sSiteURL = value; #/MUiV } p4bQCI &5)Kg%r srw5&s(3X public String getSFilePath() 9{^:+r { M
g1E1kXe return sFilePath; u&mB;:& } `.>2h}op E<>n0", (Lo<3a-] public void setSFilePath(String value) Jou~>0,/j { m .le' & sFilePath = value; 1 nIb/nY } BO5F6lyQ0P =YR/X@& 3)Wi?
- public String getSFileName() 7-nwfp&|$ { ,H'O`oV!1E return sFileName; A d=NJhzl } 9<W0'6%{/ i:ZpAo+Z{ .^X IZ public void setSFileName(String value) {UT^pIP\ { :%{MMhbx sFileName = value; O\q|b#q}/ } p>96>7w ac p-4g+j %1 9TJn%J$ public int getNSplitter() O|O#T.Tg { ahU\(= return nSplitter; !6'j
W! } +D&W!m s,\!@[N K)`,|q* \ public void setNSplitter(int nCount) ;sT7c1X^! { A?06fo, nSplitter = nCount; l[fU0;A } 1;i[H[hNY } wBTnI>l9[ o;7!$v>uK LZqx6~]O /* GE\@mu *pO **Utility.java 2v0lWO~c7z */ N0,.cd]y` package NetFox; d/k&f5 7N+No.vR. _Y40a+hk] public class Utility { Y4YA1F 8B"jvrs g|a2z_R public Utility() ~T|?!zML { JM0'V0z WJ9Jj69 Wo<zvut8 } EGf9pcUEO& rQC{"hS1 //线程睡眠 f`*Ip? V- public static void sleep(int nSecond) *6cP-Vzd { CP)x; try{ 4Cr|]o' Thread.sleep(nSecond); {a- p/\U } S^HuQe!# catch(Exception e) I
$!Y { 4E}]> e.printStackTrace (); r5xu#%hgp; } r]iec{ ^ } _'JKPD[ iqig~fjK~ //日志 U{gJn#e/. public static void log(String sMsg) ]7}2"?J4v { ]xBQ7Xqf| System.err.println(sMsg); ^EdY:6NJ=A } &Y;z[+(P r in#lu&N &]iX>m. public static void log(int sMsg) o
/AEp)8 { 'KMyaEh.u System.err.println(sMsg); -)(HG)3 } uli,@5%\ } / Li?;H u~=>$oT't ,~`R{,N` /* qd6XKl\5 **TestMethod.java '9>z4G*Td */ xV @X%E package NetFox; {wiw]@c8 f'Dl*d v?F~fRH public class TestMethod { 6H\3 id8a#&t] LSv0zAIe/ public TestMethod() j
yR9a! { ///xx/weblogic60b2_win.exe I:Wrwd
try{ MQ9 9fD$ SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); $rD&rsx6 //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); 7 [N1Vr(1 SiteFileFetch fileFetch = new SiteFileFetch(bean); OWT5Bjl fileFetch.start();
3#}5dO } '\Z54$ catch(Exception e){e.printStackTrace ();} cd)yj&:?Bt %Ak"d+OH4 X!V@jo9? } /xj^TyWM SsiAyQ|Ma Z6\OkD public static void main(String[] args) c&z@HEzV7 { vG`R. new TestMethod(); _ #288`bU } .YKqYN?y4 } @6w\q?.s 点击下载更多相关资料
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