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/* ^& tZ **SiteFileFetch.java D9CaFu */ J6s`'gFns package NetFox; dGYn4i2k? import java.io.*; Ustv{:7v import java.net.*; uD$u2 hk(ZM#Bh <EB+1GFuI public class SiteFileFetch extends Thread { B:;pvW] @fZ,.2ar |mdVdD~go SiteInfoBean siteInfoBean = null; //文件信息Bean (
iBl long[] nStartPos; //开始位置 G C),N\@Q long[] nEndPos; //结束位置 .779pT!,M FileSplitterFetch[] fileSplitterFetch; //子线程对象 ?cBwPetp long nFileLength; //文件长度 \:# L) boolean bFirst = true; //是否第一次取文件 av}k)ZT_ boolean bStop = false; //停止标志 eueH)Xkf File tmpFile; //文件下载的临时信息 0_95|3kc DataOutputStream output; //输出到文件的输出流 =)H.cuc w(*vj //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) +qtJaYf/0 public SiteFileFetch(SiteInfoBean bean) throws IOException (lBCO?`fx { (>UZ<2GPL siteInfoBean = bean; 2\A$6N;_ //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); Ja7R2-0ii# tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); dh`K`b4I if(tmpFile.exists ()) =w_Ype` { xaq-.IQAM$ bFirst = false; t9k zw*U9 read_nPos(); ';w#w<yaI } ??-[eB. else 0U(@=7V { 67JA=,EE nStartPos = new long[bean.getNSplitter()]; 1b `1{% nEndPos = new long[bean.getNSplitter()]; ~ drS} V } zH?! jH5
k l[mWf Gv!2f } 6"LcJ%o U2tV4_ e 'NXN& { public void run() ?/wm (uL { )0.kv2o. //获得文件长度 }>pknc? //分割文件 8O5s`qKMYT //实例FileSplitterFetch ]}<}lI9 //启动FileSplitterFetch线程 fIx+ILs //等待子线程返回 4x=v?g& try{ %B2'~|g if(bFirst) ~RW+GTe
{ X:f UI4 nFileLength = getFileSize(); h0*!;Z7 if(nFileLength == -1) u:6Ic)7' { j78i#}e System.err.println("File Length is not known!"); %~O,zs.2p } ,8S/t+H else if(nFileLength == -2) .KB^3pOpx { tVYF{3BhA System.err.println("File is not access!"); :;RMo2Tl } YFLZ %( else s[RAHU { :T^a&)aL% for(int i=0;i<nStartPos.length;i++) |IeTqEu9 { rT=rrvV3g nStartPos = (long)(i*(nFileLength/nStartPos.length)); {g'(~ qv } <prk8jSWV for(int i=0;i<nEndPos.length-1;i++) OZb-:!m* { FZ{h?#2? nEndPos = nStartPos[i+1]; [SjqOTon{ } %+aCJu[k(z nEndPos[nEndPos.length-1] = nFileLength; (+w*[qHe } h"[AOfTE$ } MD}w Y><C f&NgS+<K$ =J]&c?I //启动子线程 A9KET$i@v fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; .Yamc#A- for(int i=0;i<nStartPos.length;i++) m<<+ { %8RrRW fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), JU 4<|5H siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), NlA,'`, nStartPos,nEndPos,i); oM
X Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); lF<]8m%F fileSplitterFetch.start(); N~nziY*C,* } +RHS!0 // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), ^rB8? kt siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); 6B8VfQ9[ // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", z 4e7PW| nEndPos = " + nFileLength); rX U // fileSplitterFetch[nPos.length-1].start(); z{%<<pZ @f_Lp%K I
}a`0Y&{ //等待子线程结束 ")1:F> //int count = 0; o@_q]/Mh //是否结束while循环 y B81f boolean breakWhile = false; ~T"Rw2vb H9Gh>u]} RF?`vRZOe while(!bStop) sbfuzpg]* { 77 Q5d"sIi write_nPos(); /m!BY}4W Utility.sleep(500); ` _6C{<O breakWhile = true; H-!,yte K6)Gc%:` vRTkgH#4l for(int i=0;i<nStartPos.length;i++) v1#otrf { (fhb0i- if(!fileSplitterFetch.bDownOver) h,(26 y/s { CmWeY$Jb breakWhile = false; j}#w)M break; [DYQ"A=)d } Ex.yU{|c } XMCXQs& if(breakWhile) SjK break; ,Y@Gyx!4 <q)# K$z2YJ% //count++; }t!Gey //if(count>4) j\ZXG=j // siteStop(); b3P+H r } Yz9owe8}[ !@5 9) x
o;QCOH System.err.println("文件下载结束!"); iR HQ:Y! } b;L\EB catch(Exception e){e.printStackTrace ();} ~kV/!= } H[T?\Lq d.aS{;pse \wmN //获得文件长度 0RzEY!9g+ public long getFileSize() PgAf\.48a { pP1|&`}ux int nFileLength = -1; TbMW|0 #w try{ MnmVl"(/ URL url = new URL(siteInfoBean.getSSiteURL()); hy9\57_# HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); 1l9G[o
* httpConnection.setRequestProperty("User-Agent","NetFox"); UklUw _OYasJUMG l#&8x int responseCode=httpConnection.getResponseCode(); t <~h'U if(responseCode>=400) >:SHV W { g%o(+d processErrorCode(responseCode); ]iVcog"T return -2; //-2 represent access is error 2y75 } xexaQuK )',R[|< Q;Ak4[ String sHeader; $Ph|e)p 53_Hl]#qZ pR<`H' for(int i=1;;i++) SV4E0c> { $+Z[K.2J //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); WpDSg*fk=Y //Utility.log(in.readLine()); aNsBcov3O sHeader=httpConnection.getHeaderFieldKey(i); 7lTC{7C57 if(sHeader!=null) gE-tjoJ { eNh39er if(sHeader.equals("Content-Length")) EZgwF=lO { \eTwXe]Pv nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); KA5v +~ break; m5n#v } qyb?49I } '(6z.
toQ else %64)(z break; `K"L /I9 } v4<nI;Ux } 5{TsiZh4 catch(IOException e){e.printStackTrace ();} 3l]lwV catch(Exception e){e.printStackTrace ();} 'B$yo] &/Z
/Y ] _1X!EH" Utility.log(nFileLength); BX/8O<s0 ?JbilK}a +D6YR$_< return nFileLength; ';k5?^T } W<{h,j8 !"AvY y9 E#34Wh2z //保存下载信息(文件指针位置) s3N'02G private void write_nPos() _{ue8kGt { ,O5NLg- try{ ~i= _J3' output = new DataOutputStream(new FileOutputStream(tmpFile)); I@\lN&HC output.writeInt(nStartPos.length); t3WiomNCc for(int i=0;i<nStartPos.length;i++) .N;=\C* { :]K4KFM // output.writeLong(nPos); cdH>n) output.writeLong(fileSplitterFetch.nStartPos); E,Z$pKL? output.writeLong(fileSplitterFetch.nEndPos); Xfc-UP|} } q_lKKzA output.close();
Q>qUk@ } ux-/>enc catch(IOException e){e.printStackTrace ();} evJ4C#Pr catch(Exception e){e.printStackTrace ();} W ~<^L\Lu } y8y5*e~A-) iO$8:mxm0? Cl.x'v //读取保存的下载信息(文件指针位置) !<|4C6X:4 private void read_nPos() sfH_5
#w { 5&g@3j] try{ Oamg]ST DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); ]OhiYU4 int nCount = input.readInt(); &<g|gsG` nStartPos = new long[nCount]; f^ZRT@`O nEndPos = new long[nCount]; Rr$-tYy6 for(int i=0;i<nStartPos.length;i++) 1UgEI"#a6g { `cn#B
BV nStartPos = input.readLong(); 2ACCh4(/P nEndPos = input.readLong(); H H)!_(SA } of~4Q{f$6 input.close(); &3>)qul } m,28u3@r catch(IOException e){e.printStackTrace ();} ;]puq catch(Exception e){e.printStackTrace ();} _RYxD"my } 'c&Ed T.F!+ hW')Sp private void processErrorCode(int nErrorCode) "9uKtQS0o { 3yme1Mb System.err.println("Error Code : " + nErrorCode); yF:1( 4 } 0JS?; fk bRDYGuC Rh2+=N<X //停止文件下载 OKZV{Gja public void siteStop() 234p9A@ { GMx&y2. Z bStop = true; ;>hO+Wo for(int i=0;i<nStartPos.length;i++) `RT>}_j fileSplitterFetch.splitterStop(); iXkF1r]i qbr$>xH ^6x%*/l| } ]EbM9Fo-U } ^0)g/`H^> //负责部分文件的抓取 G't$Qx,IC **FileSplitterFetch.java GKqm&/M*= */ ;O5zUl-` package NetFox; Ty\R=y}} ;C#F>SG\S + 480 l} import java.io.*; , pfG import java.net.*; M^Yh|%M ja'T+!k #Pau\|e_ public class FileSplitterFetch extends Thread { uc{Ihw g/_5unI}u ~At7 +F[ String sURL; //File URL XW H5d-
long nStartPos; //File Snippet Start Position I|!OY`ko long nEndPos; //File Snippet End Position hag$GX'2k int nThreadID; //Thread's ID c]-<vkpV boolean bDownOver = false; //Downing is over w"F
9l boolean bStop = false; //Stop identical \7eUw,~Q> FileAccessI fileAccessI = null; //File Access interface ,t744k') UgRiIQMq. ztY}5A2` public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException Es`Px_k { s)t@ol this.sURL = sURL; ~Cttzn]pR this.nStartPos = nStart; (x|T+c"bAX this.nEndPos = nEnd; G>=*yqo
nThreadID = id; octL"t8w fileAccessI = new FileAccessI(sName,nStartPos);//定位 2s8a
$3 } l30EKoul) Wi<m{.%\E @{e}4s?7od public void run() *Q.>-J<S { =Bey gT^ while(nStartPos < nEndPos && !bStop) Jr4Ky<G_i { }tuC} S?LQu 2.y-48Nz try{ dQX6(Jj URL url = new URL(sURL); QL/(72K HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); 4@gG<QJW httpConnection.setRequestProperty("User-Agent","NetFox"); U>SShpmZA String sProperty = "bytes="+nStartPos+"-"; Vt~{Gu-Y httpConnection.setRequestProperty("RANGE",sProperty); Pm?KI<TH~ Utility.log(sProperty); M0"_^? y<3-?}.aZ #z%fx
InputStream input = httpConnection.getInputStream(); Zl!kJ:0 //logResponseHead(httpConnection); RBd7YWo\|j
8W7J3{d I][*j byte[] b = new byte[1024]; 1.hyCTnI int nRead; Ee#q9Cx^J while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) hfB%`x#akQ { }v{LRRi nStartPos += fileAccessI.write(b,0,nRead); 3 \,4 ]l|
//if(nThreadID == 1) 7EEl+;wK // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); LOYk9m } G!##X: 6' C.P*#_R VQ@ Utility.log("Thread " + nThreadID + " is over!"); e%M;?0j bDownOver = true; =XQ%t
@z0 //nPos = fileAccessI.write (b,0,nRead); {S\{Ii6 } ?z+eWL catch(Exception e){e.printStackTrace ();} {YC@T(
} ]/6z;
~3U } IP pN@ e`s
~.ZF 4J?0bZ //打印回应的头信息 G_JA-@i% public void logResponseHead(HttpURLConnection con) 372rbY { TX/Xt7#R: for(int i=1;;i++) ,p a {qne { 'Is kWgc String header=con.getHeaderFieldKey(i); t?gic9
q if(header!=null) T!{w~'=F //responseHeaders.put(header,httpConnection.getHeaderField(header)); .{^5X)
Utility.log(header+" : "+con.getHeaderField(header)); kZ:ZtE else f~[7t:WD* break; t@;p } wlvgg } @HC Vmg: ajT*/L!0_ .P]+? %& public void splitterStop() @mBQ?;qlK { >U>(`r* bStop = true; UkC!1Jy } -2[a2^a' dT8S~-d% X?',n
1 } }.(B}/$u bJ%h53 3"e,qY /* #{6/ (X **FileAccess.java xo&_bMO *//文件访问(定位,写) mJnIwdW* package NetFox; b%`1cV import java.io.*; ;'K5J9k WH} y"W {P./==^0 public class FileAccessI implements Serializable{ aXYY:; 6gE7e|+ //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 Vb_4f" RandomAccessFile oSavedFile; ,4$>,@WW~ long nPos; P@B] x9g#<2w8 p6@)-2^ public FileAccessI() throws IOException n\DV3rXI9 { {tZ.v@ this("",0); m
s\} } f}e`XA? q9_OGd|P "8MF_Gu): public FileAccessI(String sName,long nPos) throws IOException 7$=InK { KpGhQdR# oSavedFile = new RandomAccessFile(sName,"rw"); "+s++@
z this.nPos = nPos; GefTdO.& oSavedFile.seek(nPos); >GRxHK@G } RrB&\9= b$joY*< 6 >bW#Zs,6 public synchronized int write(byte[] b,int nStart,int nLen) VONDc1%ga { eauF~md, int n = -1;
t{96p77)= try{ +<C!U' oSavedFile.write(b,nStart,nLen); 6_Y,eL]" n = nLen; ~?BXti<! } ?tbrbkx catch(IOException e) ZE}}W_ { :I#V. e.printStackTrace (); &QgR*,5eo } Rm( "=( }7Q% 6&IR 5b*C1HS@X return n; 8ib:FF(= u } i_%_ x* !|(NgzDP/ N6:`/f+A>T } 1+s;FJ2} sgFEK[w.y k,*XG$2h /* *2l7f`K **SiteInfoBean.java !Vk^TFt` */ ;=z:F<Y package NetFox; @ 6vIap| W<g1<z\f fJg+ Ryo public class SiteInfoBean { H:|uw 9'B `]/L WyiQoN'q private String sSiteURL; //Site's URL |6-nbj private String sFilePath; //Saved File's Path 2>%=U~5 private String sFileName; //Saved File's Name HRA|q private int nSplitter; //Count of Splited Downloading File z b3tIRH =s6 opL) 59u}W 0 public SiteInfoBean() l/5
hp. {//nSplitter的缺省值为5 [/r(__. //default value of nSplitter is 5 ob]w;" this("","","",5); W>r+h-kR }
J&_n9$ RA 6w}:sq7 9(Xn>G'iT public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) Di{de` { PKz':_| sSiteURL= sURL; (bS&D/N. sFilePath = sPath; h?U
O&( sFileName = sName; i%?* @uj this.nSplitter = nSpiltter; *;FdD{+ }GM'.yutX (ZlU^Gw#UB } ~xTt204S -9?]IIVb ;_=&-mz public String getSSiteURL() o mx= { Mtx 4'WZ return sSiteURL; ~W/z96'
5 } V7/Rby Q [}m[ )L\ gX@aG9 public void setSSiteURL(String value) DlJo^|5 { *T1_;4i sSiteURL = value; {!`6zBsP } HzJz+ x: ]?4hyN 8@R|Km5h public String getSFilePath() Fr-SvsNFB { 7tp36 TE return sFilePath; 3so%gvY.' } l]SX@zTb
='jT~\ WIGi51yC.x public void setSFilePath(String value) rJB}qYD { Z_NCD`i; sFilePath = value; =_^X3z0 } *
y,v}- *^`Vz?g< pj(,Zd[47 public String getSFileName() LP=)~K< { RnN!2K return sFileName; x)&\z} } ;.C\Ss<>* j8gdlIx zuCSj~ public void setSFileName(String value) ,!9zrYi} { O6Y0XL sFileName = value; 2g<Xtt7+o } eS!/(#T ssL\g`xe 5V-I1B& public int getNSplitter() 5zJq9\)d+ { :6dxtl/{b: return nSplitter; FI.\%x } GvAb`c= H?w6C):] Y:`&=wjP~ public void setNSplitter(int nCount) fqd^9wl>P6 { D_MmW nSplitter = nCount; 'ga/ } VU#7%ufu& } jiGTA:v EM_d8o)`B gM]:Ma /* d zMb5puH **Utility.java c@Is2
9t* */ l-3~K-k<@ package NetFox; 18Emi<&A ?]5qr?W% |y*c9 public class Utility { Rb;'O89Hj@ F"kAkX>3} zm# ?W public Utility() iow"n$/ { Ul# r N>E_%]C h D+c>F5 } x1<|hTPk A}^mdw9 //线程睡眠 VN.Je:Ju public static void sleep(int nSecond) kGJC\{N5N { }B^tL$k try{ >GuM]qn Thread.sleep(nSecond); dWW.Y*339 } $Kd>:f=A catch(Exception e) 7$#u { UZ";a453r e.printStackTrace (); xx $cnG } +ai<
q>+ } bK7J} 8hH &3&HY:yF //日志 g{LP7D;6 public static void log(String sMsg) H*6W q { R-14=|7a- System.err.println(sMsg); _dU\JD } Xc.`-J~Il #z42C?V cb bFw public static void log(int sMsg) s[ N@0 { _Ey5n!0: System.err.println(sMsg); ,z6~?6m } 0`H#
'/ } ZC8wA;!z^ ,u m|1dh )}vl\7= /* P
{'b:C **TestMethod.java 2zpr~cB= */ DwF hK* package NetFox; @|!z9Y* Z :gyz$9w 7[7"A public class TestMethod { QL* IiFR vSh`&w^* ?ubro0F: public TestMethod() 5-M-X#( { ///xx/weblogic60b2_win.exe AwN!;t_0+N try{ s^SJY{ SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); ]^]wP]R_ //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); kVL.PY\K SiteFileFetch fileFetch = new SiteFileFetch(bean); }WV:erg` fileFetch.start(); # "an9< } ;}t(Wnu. catch(Exception e){e.printStackTrace ();} K^[?O{x^B Ho%CDz
z Gh$^ { } I:.s_8mH} M3AXe]<eC1 Pc9H0\+Xk public static void main(String[] args) zreU')a { 0IpmRH/ new TestMethod(); /tLVX} & } ;rS{: } KlqY@Xt 点击下载更多相关资料
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