-
UID:2537
-
- 注册时间2006-05-09
- 最后登录2020-05-29
- 在线时间3小时
-
- 发帖8
- 搜Ta的帖子
- 精华
0
- 铜板1641
- 人品值95
- 贡献值0
- 交易币0
- 好评度8
- 信誉值0
- 金币0
-
访问TA的空间加好友用道具
- 发帖
- 8
- 铜板
- 1641
- 人品值
- 95
- 贡献值
- 0
- 交易币
- 0
- 好评度
- 8
- 信誉值
- 0
- 金币
- 0
- 所在楼道
|
/* p~n62( **SiteFileFetch.java S? -6hGA
j */ D 7D:?VoR package NetFox; |f:1Br import java.io.*; 4x`.nql import java.net.*; hSg4A=y r )EuH.z cc*xHv^ public class SiteFileFetch extends Thread { ?89K
[D| TVk C pO,H sPu@t&$
SiteInfoBean siteInfoBean = null; //文件信息Bean Dd3GdG@*~ long[] nStartPos; //开始位置 :`pgdn long[] nEndPos; //结束位置 0[f8Gb3 FileSplitterFetch[] fileSplitterFetch; //子线程对象 7$z]oVbO' long nFileLength; //文件长度 =54"9* boolean bFirst = true; //是否第一次取文件 $.7Ov| boolean bStop = false; //停止标志 1>KZ1Kf File tmpFile; //文件下载的临时信息 h{J=Rq DataOutputStream output; //输出到文件的输出流 aSN"MTw. dx/NY1 //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) yF~iVt public SiteFileFetch(SiteInfoBean bean) throws IOException 6N6}3J5 { QB/H siteInfoBean = bean; u?ALZxj? //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); q ,C)AZ tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); W)RCo}f if(tmpFile.exists ()) #QWG5 { "JH
/ODm bFirst = false; o
0-3[W'x< read_nPos(); Cwb}$=p' } )kBN]>&R else i^i^g5l! { \-Oq/g{j nStartPos = new long[bean.getNSplitter()]; /3(|P nEndPos = new long[bean.getNSplitter()]; Po
,zTz } X;~3 U
9 y<Z-f. rJ@yOed["b q1|! oQ } X-Yy1"6m1 THFzC/~Q QJsud{ada public void run() |uT&M`7\{ { g[#4`Q<. //获得文件长度 Zx1 I&K\Cd //分割文件 (_9cL,v //实例FileSplitterFetch nVO|*Bnf) //启动FileSplitterFetch线程 @CxXkR //等待子线程返回 e5"?ol0 try{ ^Hdru]A$2 if(bFirst) &fIx2ZM[ { Ah_Ttj nFileLength = getFileSize(); ",qcqG( if(nFileLength == -1) b8>2Y'X { JfrPK/Vn System.err.println("File Length is not known!"); zvDg1p } !9n!:"(r else if(nFileLength == -2) N?RJuDW { |%i|P)] System.err.println("File is not access!"); #S*@RKSE|7 } A `H&"A else ]tu:V,q { o#X=1us for(int i=0;i<nStartPos.length;i++) *Dz<Pi^ { 'QMvj` - nStartPos = (long)(i*(nFileLength/nStartPos.length)); jn+M L& } kW
7$ for(int i=0;i<nEndPos.length-1;i++) 3
zF"GT { '&|]tu:q nEndPos = nStartPos[i+1]; N9[2k.oBH } "I7 Sed7 nEndPos[nEndPos.length-1] = nFileLength; OLl?1 } Dd=iYMm7 } ITq$8 x+X^K_* Y!+q3`-%T //启动子线程 q%RPAe fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; E&RiEhuv for(int i=0;i<nStartPos.length;i++) 0Xke26ga { T VuDK fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), " %,KZI siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), DaK2P;WP nStartPos,nEndPos,i); PCx] >& Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); y5v}EX`m& fileSplitterFetch.start(); MgP6ki1z } nVK`H@5fw // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), t!u{sr{j= siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); nJ ZQRRa:C // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", ?eU=xO nEndPos = " + nFileLength); gmU0/z3& // fileSplitterFetch[nPos.length-1].start(); Gp PlO] ]h`<E~ k *#fN(_ //等待子线程结束 z1WF@Ej //int count = 0; Hf
]w //是否结束while循环 clcj5=: boolean breakWhile = false; 4)IRm2G %"1*,g{ MmvMuX]#) while(!bStop) (16U]s { ?9?eA^X% write_nPos(); 6?CBa]QG Utility.sleep(500); =LsW\.T6 breakWhile = true; 9AbSt&# M[Kk43;QY! $;ssW"7~Qn for(int i=0;i<nStartPos.length;i++) ?
7H'#l { v)TFpV6b{p if(!fileSplitterFetch.bDownOver) EZz`pE { }EW@/; kC breakWhile = false; M<
T[%)v break; rLy<3 } 7n_'2qY } ZgXn8O[a if(breakWhile) T9N&Nh7 3 break; Ao%;!(\I% `2j \(N, Vd' KN2Jm //count++; _;M46o%h //if(count>4) c<(LXf+61 // siteStop(); )/:r$n7 } XHN`f#(w w(y#{!%+ Ke_&dgsq System.err.println("文件下载结束!"); upJ|`,G{ } :N3'$M" catch(Exception e){e.printStackTrace ();} /!u#S9_B } Q]?Lg vbZGs7% 5_d=~whO&2 //获得文件长度 [CfA\-gx<f public long getFileSize() =>PBdW { * MJl( int nFileLength = -1; @k ~_ w# try{ }iK_7g`yKa URL url = new URL(siteInfoBean.getSSiteURL()); 6]#\|lds1 HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); !A 6l\_ httpConnection.setRequestProperty("User-Agent","NetFox"); *@C4~Zo N1O& fMz s`bC?wr5h int responseCode=httpConnection.getResponseCode(); A(xCW+h@) if(responseCode>=400) (4U59<ie { Ix"hl0Kh processErrorCode(responseCode); )ZU=`!4 return -2; //-2 represent access is error L
1fK } fO4e[g;G %/^kr ZD Xgy)Z:R String sHeader; s 4Mi9h_ 05|,-S wc-ll&0Z
for(int i=1;;i++) qlUw;{;p { 6iozb~!Rr //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); BBub' //Utility.log(in.readLine()); Qe~2'Hw#9 sHeader=httpConnection.getHeaderFieldKey(i); Qoj}]jve if(sHeader!=null) 8Jz/' { a-`OE" if(sHeader.equals("Content-Length")) .45XS>=z# { cI5*`LML1 nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); #&@qmps(T break;
O$> <E8q } t*fG;YOg } +3c!.] o; else x bG'![OX break; %Jrdr`< } NMSpi[dr } UL/|!(s catch(IOException e){e.printStackTrace ();} O\5*p=v catch(Exception e){e.printStackTrace ();} ]g>@r.Nc %HRFH >PsP y. Utility.log(nFileLength); a?+Ni|+ !f(aWrw7e6 :Rs% (Z return nFileLength; )$#r6fQO } dh7PpuN{ !U,^+"l'GP -jZP&8dPH //保存下载信息(文件指针位置) /nK)esB1L private void write_nPos() bw@DcT&, { qM`XF32A$ try{ _{EO9s2FG output = new DataOutputStream(new FileOutputStream(tmpFile)); ez2 gy" output.writeInt(nStartPos.length); s eFug for(int i=0;i<nStartPos.length;i++) 5(/ 5$u { ;%1ob f 89 // output.writeLong(nPos); [;c'o5M& output.writeLong(fileSplitterFetch.nStartPos); a0"gt"qA output.writeLong(fileSplitterFetch.nEndPos); C?n3J } 1MtvnPY output.close(); W#<&(s4 }
`ag7xd! catch(IOException e){e.printStackTrace ();} $jYwV0 catch(Exception e){e.printStackTrace ();} vT<q zN } 5XNIX)H 3:$hC8 !b O8apn //读取保存的下载信息(文件指针位置) JJnZbJti private void read_nPos() SL;\S74 { Z=O 2tR try{ 7Q<uk[d0 DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); +uF!.!} int nCount = input.readInt(); ~Od4(
}/G nStartPos = new long[nCount]; Sx,O) nEndPos = new long[nCount]; :E|HP#iwu for(int i=0;i<nStartPos.length;i++) 1i}Rc: { mT.p-C nStartPos = input.readLong(); ?VMj;+'tr nEndPos = input.readLong(); U~8.uldnF } S9Fg0E+J input.close(); v+Vpak9| } [aF?1KxNMt catch(IOException e){e.printStackTrace ();} x@+m_y catch(Exception e){e.printStackTrace ();} -jB1tba } oZO6J-ea /EUv=89{! eNlE]W,= private void processErrorCode(int nErrorCode) xMsos?5} { w5l:^^zF( System.err.println("Error Code : " + nErrorCode); ~U:{~z } {xw*H<"f< r}i<cyL %$j)?e //停止文件下载 4C(v BKl public void siteStop() NyD[9R? { D4yJ:ATO& bStop = true; 7N^9D
H{` for(int i=0;i<nStartPos.length;i++) e~r%8.Wm fileSplitterFetch.splitterStop(); 5_+vjV;5 -OpI,qyS UA[2R1}d } ,\;;1Kq } 'Y+AU#1~H //负责部分文件的抓取 ,ZcW+! **FileSplitterFetch.java zCD?5*7 */ 07"dU
package NetFox; \5^#5_< lKs*KwG dtQ>4C"N import java.io.*; \4wM8j import java.net.*; m",wjoZe* g$~3 @zD 9<5SQ public class FileSplitterFetch extends Thread { {
p {a0*$5 Q>nq~#3? ZVpMR0! String sURL; //File URL [ADr
_ long nStartPos; //File Snippet Start Position ;YxQo
o> long nEndPos; //File Snippet End Position v*5n$UFV int nThreadID; //Thread's ID W|@EK E.k boolean bDownOver = false; //Downing is over (US]e
un
boolean bStop = false; //Stop identical sk!v!^\_r FileAccessI fileAccessI = null; //File Access interface Wy%q9x]} QP|Ou*Qm) B^Q\l!r public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException zIWw055W { SsDz>PP this.sURL = sURL; v'B++-% this.nStartPos = nStart; o)KF+[^ this.nEndPos = nEnd; buGW+TrWY nThreadID = id; 3%m2$\ fileAccessI = new FileAccessI(sName,nStartPos);//定位
ykSn=0 } 5O&6 (Gaf /-<S F T` zpr` public void run() <Mo_GTOC! { ]{Vq; while(nStartPos < nEndPos && !bStop) |")}p=
{ [JFmhLP9 `pF|bZ?v V\@h<%{^%7 try{ z8M^TV URL url = new URL(sURL); g^(wZ$NH HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); 9i WDEk httpConnection.setRequestProperty("User-Agent","NetFox"); $j^Jj String sProperty = "bytes="+nStartPos+"-"; xA]CtB*o7 httpConnection.setRequestProperty("RANGE",sProperty); <CJua1l\ Utility.log(sProperty); gF1qZ=< vpx8GiV `h12 InputStream input = httpConnection.getInputStream(); {zBf *x //logResponseHead(httpConnection); aksyr$d0V< C$\|eC j <OF7:f byte[] b = new byte[1024]; jcQ{,9
H`l int nRead; l2>G +t (, while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) ^8aj\xe( { _{&znXf>?6 nStartPos += fileAccessI.write(b,0,nRead); _n_lO8mK //if(nThreadID == 1) 7f#[+i // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); QJp
_>K } 6}
!n0 aT[Z#Zd, N =?T\zLN= Utility.log("Thread " + nThreadID + " is over!"); ?"PUw3V3lB bDownOver = true; `@ULG> //nPos = fileAccessI.write (b,0,nRead); "aK3
ylz; } DDn@M|*$ catch(Exception e){e.printStackTrace ();} }6.R.*Imz } :kq J~ } Dna0M0 $"C]y$} 0 V*Di2 //打印回应的头信息 ~WU _u,: public void logResponseHead(HttpURLConnection con) U?JZ23>bbw { >-
]tOH,0 for(int i=1;;i++) 4&)*PKq { ]uX'[Z}t String header=con.getHeaderFieldKey(i); q=ZLSBZ if(header!=null) `w6\II)aB //responseHeaders.put(header,httpConnection.getHeaderField(header)); z`((l#( Utility.log(header+" : "+con.getHeaderField(header)); eIK8J,- else +ZtqR break; xn1 } G!k&'{2 } vGO- a2Z Y8`4K* 58% W$ #FM$U public void splitterStop() 8AT;9wZqt { |{+D65R bStop = true; #9}E@GGs } 9=pG$+01OR ! lgsV..R P%f],f } qI\qpWS\ ii0AhQ q$e2x=? /* EcrM`E#kaZ **FileAccess.java V"(S<o *//文件访问(定位,写) $q]((@i. package NetFox; {MU>5\ import java.io.*; .2/(G{}U -fuSCj LEvdPG$) public class FileAccessI implements Serializable{ G`PSb<h\oc mm\Jf //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 0e9W>J9 RandomAccessFile oSavedFile; 1w'iD
X long nPos; ~F^=7oq ChF:N0w?
p 1.!rq,+>1 public FileAccessI() throws IOException AZz
} { 7$WO@yOsh this("",0); !=--pb } GM|gm-t<@ o!^':mll Lgpj<H[ public FileAccessI(String sName,long nPos) throws IOException G*uy@s: { e*jt(p[Ge oSavedFile = new RandomAccessFile(sName,"rw"); NmYSk6kWJ this.nPos = nPos; rc1EJ(c oSavedFile.seek(nPos); Um]>B`."wK } u&?J+ ]78I *5 ]fjh{ public synchronized int write(byte[] b,int nStart,int nLen) 1u75 { x:b0G int n = -1; +"6_rbeuO try{ !L:!X88 oSavedFile.write(b,nStart,nLen); /lkIbmV n = nLen; 7)S`AQ2:) } xekW-=#a7- catch(IOException e) S:/;|Dg { 2;r(?ebw e.printStackTrace (); n?_!gqK } hL~@Ah5&t nzE4P3 C+ v' .:?9 return n; \ F#mwl,>" } Q\&FuU .9+"rK}u k-xh-& } frbKi _1 #P=rP= GLQ1rT /* JDfkm+}uY **SiteInfoBean.java |4aV~n[># */ f!a[+^RB: package NetFox; Q
,30 SdBv?`u|g D oX!P|* public class SiteInfoBean { &0SX*KyI A#M#JI-Y db$Th=s[ private String sSiteURL; //Site's URL )dgXS//Y private String sFilePath; //Saved File's Path A-1Wn^,>* private String sFileName; //Saved File's Name F2]v]]F! private int nSplitter; //Count of Splited Downloading File K#H}=Y A :&}(?=<R}L 7SLJLn3d public SiteInfoBean() /9 NQ u {//nSplitter的缺省值为5 I8@NQ=UV0 //default value of nSplitter is 5 &1YqPk this("","","",5); PN[
`p1F } 1%Xwk2l,8b uFOxb}a9v m5Q,RwJ!xK public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) (xpj?zlmM { =`[08 sSiteURL= sURL; =Ig'Aw$ x sFilePath = sPath; v Ic0V sFileName = sName; mv|eEz)r this.nSplitter = nSpiltter; W!8g.r4u+, akHcN]sa2 Pj>r(Cv } _fha9` "_]n_[t2C B
=@BYqiY public String getSSiteURL() L22GOa0 { Pf;'eOdp return sSiteURL; jnsV'@v8Nj } vJVL%,7 kmPK |R {j@
S<PD public void setSSiteURL(String value) _"
W<> { 8-5MGh0L sSiteURL = value; MO&QR-OY } e}y oy+9 r,X5@/ z=:<]j#= public String getSFilePath() -jnx0{/ { |ybW return sFilePath; W.TZU'% } 87P{vf# [~9rp]< '#gd19# public void setSFilePath(String value) ]C_g:|q { #7I,.DUy[ sFilePath = value; 7yo/sb9h } X5 UcemO B?9K! c PhW<)B] public String getSFileName() 3IQ)%EN { <-62m8N| return sFileName; &54fFyJF } w|:UTJ>@ ..6 : _{wg O^ZOc0< public void setSFileName(String value) 4of3#M { Ac;rMwXk# sFileName = value; c;c'E&9P] } R+k-mbvnt vKN"o* q H6(kxpOI\ public int getNSplitter() oVutHt { gXN#<g,:^ return nSplitter; ]Aap4+s } E;$)Oz wU,{5 w 7_C;- public void setNSplitter(int nCount) qYv/"
1 { sKYb&2wJ nSplitter = nCount; ',j'Hf } wr{03mQHxp } f>\OT
w='1uV<6 ktLXL;~X /* LW6&^S?4{ **Utility.java =S/$h}Vi */ maQE Bi, package NetFox; >yFEUD: 6z
v+Av: H|_^T.n?E public class Utility { N|hNh$J[ k%-_z}:3V TJFxo?
gC" public Utility() _h>S7-X { R r! PU ofbNg_K> @/h_v#W } )R$+dPu> Li~(kw3 //线程睡眠 P\\4 w)C public static void sleep(int nSecond) 2`>/y { TY~8`+bJ try{ N1$lG?
)+ Thread.sleep(nSecond); 'U
',9 } U ^1Xc#Ff catch(Exception e) ~01
o { TP' e.printStackTrace (); V\^rs41$; } /.<%y8v } D>M
a3g e^kccz2f //日志 4DI.RK9 public static void log(String sMsg) RG/M- { h-
.V[]< System.err.println(sMsg); 3qOq:ZkQ } (7BG~T qS<a5 `EA mqgA public static void log(int sMsg) m^cr-' { W5,e;4/hL System.err.println(sMsg); T|^rFaA } jqq96hP, } 4zuM?Dp tiG=KHK%o *A C){M /* dr0<K[S_ **TestMethod.java kbzzage6L */ IJHNb_Cku package NetFox; @
hH;d\W# 2[f8"'lUQ ?dMyhU} public class TestMethod { ?B
;+, G)5w_^&% ZN>oz@jY public TestMethod() GJz d4kj { ///xx/weblogic60b2_win.exe Z$!>hiz2 try{ B:S/
?v SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); *sK")Q4N //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); kKr|PFz SiteFileFetch fileFetch = new SiteFileFetch(bean); I>ks H fileFetch.start(); X`bN/sI } _j{^I^P catch(Exception e){e.printStackTrace ();}
i zJa`K mh`~1aEr Eukj2a } )RA$E`!b QX}O{LQR v0euvs public static void main(String[] args) x'Pp! { *,qW9z new TestMethod(); S <~"\<ED } X,VOKj.% } '>dsROB-> 点击下载更多相关资料
|