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/* hC= ="4 - **SiteFileFetch.java b%,`;hy{ */ \(bML#I package NetFox; Zx]"2U# import java.io.*; wA}+E)x/C import java.net.*; ffYiu4$m hYN b9^ x_5H_! \# public class SiteFileFetch extends Thread { ,!4(B1@
?Yp: h [(N<E/m %B SiteInfoBean siteInfoBean = null; //文件信息Bean SSF4P& long[] nStartPos; //开始位置 ]Z\.Vx long[] nEndPos; //结束位置 R#Bdfmldq FileSplitterFetch[] fileSplitterFetch; //子线程对象 ;=6~,k) long nFileLength; //文件长度 3J}bI{3 boolean bFirst = true; //是否第一次取文件 up7]Yy;o= boolean bStop = false; //停止标志 L1k_AC1.M File tmpFile; //文件下载的临时信息 f"5vpU^5* DataOutputStream output; //输出到文件的输出流 DP9hvu/85 QY<2i-A //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) wy$9QN public SiteFileFetch(SiteInfoBean bean) throws IOException Dl%NVi+n { Pw'3ya8 siteInfoBean = bean; m.p{+_@M& //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); 8+1tys tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); 7>J8\= if(tmpFile.exists ()) #\$R^u]! { 5!G}*u. bFirst = false; u1&pJLK0[ read_nPos(); Ij }RlYQz } ~$i36" else 70:a2m { ?c^0%Op nStartPos = new long[bean.getNSplitter()]; 2@aVoqrq# nEndPos = new long[bean.getNSplitter()]; K/jC>4/c/ } {@oYMO~ LQs2!]?HT 6nRD:CH)X i9oi}$;J } pVt8z|p_;{ Hay`lA2@ ?t+Kp9@aZ public void run() ,m:YZ;J(Xd { }CA oB::& //获得文件长度 Uok?FEN //分割文件 lM5Xw //实例FileSplitterFetch =?3D:k7z //启动FileSplitterFetch线程 t3b%f`D //等待子线程返回 N$H0o+9-Y try{ AjK'P<:/ if(bFirst) P-VK=Y1q { 969*mcq' nFileLength = getFileSize(); _*+ 7*vAL if(nFileLength == -1) %@5f+5{i!z { w7]@QTC System.err.println("File Length is not known!"); Z!m0nx } [=-?n6 else if(nFileLength == -2) ~fE@]~f> { _d&FB~= System.err.println("File is not access!"); 5TVDt } C-$S]6 else hof:+aW { ajW[}/) for(int i=0;i<nStartPos.length;i++) _.OajE\T { ^'~+ w3M@ nStartPos = (long)(i*(nFileLength/nStartPos.length)); }}v;V*_V } [|\~-6"7N| for(int i=0;i<nEndPos.length-1;i++) 8|`4D 'Ln { qde.;Yv9 nEndPos = nStartPos[i+1]; )G0a72 } &<-Sxjj nEndPos[nEndPos.length-1] = nFileLength; <5A(rDij } B8:_yAv o } &'UYV> aO?(ZL |Gb"%5YD //启动子线程 x5k6yHn fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; %^g BDlR^ for(int i=0;i<nStartPos.length;i++) Y0=qn'`. { /z*?:* fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), ,K8O<Mw8 siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), GH![rK nStartPos,nEndPos,i); b:Dr_| Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); )W~w72j- fileSplitterFetch.start(); # &o3[.)9 }
Q uy5H // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), Kgi%Nd siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); RiF~-;v& // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", a1Qg&s< nEndPos = " + nFileLength); Tz1St{s\ // fileSplitterFetch[nPos.length-1].start(); {mMrD 5 T&I*8 R~ !j6]k^ra //等待子线程结束 67Z|=B!7 //int count = 0; .
Yg)|/ //是否结束while循环 >z1RCQWju boolean breakWhile = false; |<P]yn `AeId/A4n TGGeTtk= while(!bStop) j8!fzJG { [L8Bgw1 write_nPos(); _K>cB<+d Utility.sleep(500); K>9]I97g' breakWhile = true; 7M<Ae
D% <XX\4[wb Sb+pB58&N for(int i=0;i<nStartPos.length;i++) <*~vZT i( { .xuLvNyQr if(!fileSplitterFetch.bDownOver) iTi<X|X { IM}T2\tZ} breakWhile = false; p
mcy(< break; J
(Yfup } 0ejx;Mum } n|Vs2 7 if(breakWhile) a= ;7 break; &96I4su ^wCjMi(sj PmO utYV //count++; "d>{hP //if(count>4) @;M( oFS9 // siteStop(); gR"'|c } bWo-(
qxq 2c@R!* 5bR;R{:x System.err.println("文件下载结束!"); f@Rn&&- } :f?\ mVS+ catch(Exception e){e.printStackTrace ();} mdR:XuRD"t } |S|0'C* ~T9%%W[ R$4&>VBu //获得文件长度 G0Smss=K public long getFileSize() oJbD|m { }9
N, +* int nFileLength = -1; \1hbCv$Hf try{ u{yENZ^P URL url = new URL(siteInfoBean.getSSiteURL()); [
/w{,+U HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection ();
cHs@1R/-s httpConnection.setRequestProperty("User-Agent","NetFox"); $R%xeih1fz pHEhB9_A! YA O,
rh int responseCode=httpConnection.getResponseCode(); Wo2TU! if(responseCode>=400) 8i=J(5= { 2ixg
ix processErrorCode(responseCode); B1oi]hDy return -2; //-2 represent access is error :XEP:8 } t&^9o$ ]tL9 y< PuqT&|wP l String sHeader; ehl){Dd^ -$J\BkI \%z#|oV#< for(int i=1;;i++) /Y:&307q { RrRrB"!8nR //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); N_lQz(nG/2 //Utility.log(in.readLine()); la>:%SD sHeader=httpConnection.getHeaderFieldKey(i); ;BUJ5 if(sHeader!=null) 4=td}% { CTQF+Oe8O if(sHeader.equals("Content-Length")) [URo# { hC?:XVt nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); $As;Tvw. break; @|v4B[/ } u~7mH } xV[X#.3 else OF&{mJH"g' break; RiqYC3Ka } 9&fS<Hk } A(2_hl- catch(IOException e){e.printStackTrace ();} 0]?} kY catch(Exception e){e.printStackTrace ();} i,1=5@rw5 2W:R{dHE 3
HOJCgit Utility.log(nFileLength); Gf(hN|X. Q;W[$yvW O|=5+X return nFileLength; oa$-o/DhB } {m~.'DU \7rFfN3 (+q#kKR //保存下载信息(文件指针位置) >=BH$4Ce private void write_nPos() ggtGecKm {
?TA%P6Lw try{ ;=
^kTb`X output = new DataOutputStream(new FileOutputStream(tmpFile)); _^;+_6&[ output.writeInt(nStartPos.length); QPB@qx#@ for(int i=0;i<nStartPos.length;i++) q&OF?z7H { ["Mq // output.writeLong(nPos); B,@geJ output.writeLong(fileSplitterFetch.nStartPos); Dn~r~aR$g output.writeLong(fileSplitterFetch.nEndPos); G66sPw } "S)2<tV output.close(); <qjNX-| } @q:v?AO catch(IOException e){e.printStackTrace ();} ?=,4{(/) catch(Exception e){e.printStackTrace ();} _L
5< } /(Mi2$@v1 &HBqweI e^2e[rp0 //读取保存的下载信息(文件指针位置) ya7PF~:E- private void read_nPos() F5la:0fb { !=%0 try{ )rcFBD{vM DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); \JmfQrBQ int nCount = input.readInt(); A/V"&H[ nStartPos = new long[nCount]; /{@^h#4M1 nEndPos = new long[nCount]; </!
`m8 \ for(int i=0;i<nStartPos.length;i++) ^f*}]`S { 1{D_30sG. nStartPos = input.readLong(); M &`ZF nEndPos = input.readLong(); :j_OO5b! } &N4Jpa}w/% input.close(); #yz5CWu } W <.h@Rz+ catch(IOException e){e.printStackTrace ();} bW03m_<M<1 catch(Exception e){e.printStackTrace ();} ,{DZvif
} f}{ lRk *FhD%>< 0kC}qru' private void processErrorCode(int nErrorCode) `q
= e<$ { {6H%4n System.err.println("Error Code : " + nErrorCode); ?4>uGaU\ } #=@H-ZuD7 +/
s2;G qYpuo
D //停止文件下载 M]9oSi public void siteStop() >d#oJ?goX { YDh6XD<Z bStop = true; }xhat,9 for(int i=0;i<nStartPos.length;i++) 5'iJN$7 fileSplitterFetch.splitterStop(); m BWE^ oVi_X98R 2y6@:VxSh } T.ZPpxY } ">pW:apl% //负责部分文件的抓取 BCnf'0q **FileSplitterFetch.java T'YHV}b}vX */ kg@D?VqJP package NetFox; x1H?e8 MtE18m"z : (IPrQ import java.io.*; BC!n;IAe import java.net.*; MV8Lk/zd?A WH:[Y7D fpMnA public class FileSplitterFetch extends Thread { &qR1fbw" epz'GN]V 85;hs String sURL; //File URL Q
I!c= :u long nStartPos; //File Snippet Start Position nT7{`aaQl long nEndPos; //File Snippet End Position [HEqMBX=; int nThreadID; //Thread's ID n0nf;E boolean bDownOver = false; //Downing is over e| AA7 boolean bStop = false; //Stop identical g~q+a- FileAccessI fileAccessI = null; //File Access interface ~vf&JH'! z9> yg_Q 9{OH%bF public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException \Xy]z { CR*9-Y93 this.sURL = sURL; Cjvgf.>$ this.nStartPos = nStart; $lJu2omi1 this.nEndPos = nEnd; agQ5%t# nThreadID = id; 1-z*'Ghys fileAccessI = new FileAccessI(sName,nStartPos);//定位 9a.r(W[9 } {sn :Lj0 Znl&.,c) X`,4pSQ; public void run() 1\v$8pP+ { Y>OL2g while(nStartPos < nEndPos && !bStop) k:?+75?$ { eFO+@
$`nKq4Y T9
@^@l$ try{ i?7%z` URL url = new URL(sURL); {HgW9N( HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); ,!`94{Ggv httpConnection.setRequestProperty("User-Agent","NetFox"); ]U :1NC" String sProperty = "bytes="+nStartPos+"-"; p(2j7W-/ httpConnection.setRequestProperty("RANGE",sProperty); ,H{
/@|RW Utility.log(sProperty); K?l1Gj |=OO$z;q| R=D\VIu,Z InputStream input = httpConnection.getInputStream(); 'WqSHb7 //logResponseHead(httpConnection); to0tH^pD %9_wDfw~ jgiP2k[Xom byte[] b = new byte[1024]; 4SG22$7 W int nRead; id^U%4J while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) )B d`N^k+ { FV[6">;g nStartPos += fileAccessI.write(b,0,nRead); Dl862$_Q //if(nThreadID == 1) nMU#g])y) // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); 3t(8uG<rL } 47Y|1 Q37VhScs K#"@nVWJ.m Utility.log("Thread " + nThreadID + " is over!"); eO,
bDownOver = true; /)80@ //nPos = fileAccessI.write (b,0,nRead);
]
=Js 5 } //--r5Q catch(Exception e){e.printStackTrace ();} {$iJYS\ } (xU+Y1*g"% } {Y5h*BD> my#qmI FNZB M //打印回应的头信息 _/[n/"gn public void logResponseHead(HttpURLConnection con) {GF>HHQb { ^qpa[6D6x for(int i=1;;i++) vOYcS$,^X% { .js4)$W^ String header=con.getHeaderFieldKey(i); -;$+`<% if(header!=null) UQ|zSalv, //responseHeaders.put(header,httpConnection.getHeaderField(header)); F"a^`E& Utility.log(header+" : "+con.getHeaderField(header)); =q|fe%# else uTJi }4cw break; D#%J|| } QN(f8t( } &%pB; dk #( nheL X$JO<@x public void splitterStop() {nQ}t
}B { 1A23G$D bStop = true; V mQ7M4j* } #SY8Zv X7kJWX ;>=hQC{f> } |Sg *j-. TGLkwXOkT oWyg/{M /* [BhpfZNKRA **FileAccess.java S&-sl *//文件访问(定位,写) sF;1)7]Pq package NetFox; +N[dYm import java.io.*; bcpH|}[F) Fga9 k?Jzy public class FileAccessI implements Serializable{ (2@b ,w^ 4qda!% //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 4x'^?0H@ RandomAccessFile oSavedFile; 1elx~5v1.= long nPos; y_"GMw )EO/P+& EpGe'S public FileAccessI() throws IOException [[D}vL8d { P's <M this("",0); )ymF:]QC } *DkA$Eu3u ,WOF) 9[N'HpQ3 public FileAccessI(String sName,long nPos) throws IOException nVG\*#*]| { NQfIY`lt' oSavedFile = new RandomAccessFile(sName,"rw"); Vm8;{S q this.nPos = nPos; $#4z>~0 oSavedFile.seek(nPos); [v-?MS } 6@2p@eYo af{;4Cr !W$3p'8Tu public synchronized int write(byte[] b,int nStart,int nLen) K=sQ_j.&Z { 9r1pdG_C@ int n = -1; E08AZOY&g try{ B4R,[WE" oSavedFile.write(b,nStart,nLen); `@.YyPxX\ n = nLen; svpWABO } Op3 IL/ catch(IOException e) |ry;'[* { U7crbj;c)d e.printStackTrace (); any\}
} B_cn[?M W&06~dI1! _;01/V"q6 return n; Q,\lS } KvilGh10 8gC(N3/E" MPzqw)_-v } (%0X\zvu/ `ss]\46> 1rPeh{SZ /* mA^>Y_: **SiteInfoBean.java 6\o.wq */ 5!nZvv package NetFox; r.ajw&J2 z5'VsK: '&<-,1^L public class SiteInfoBean { 5 (H; x74
jMp{ BC$In! private String sSiteURL; //Site's URL I:6xDDpZG` private String sFilePath; //Saved File's Path %oor7 -l private String sFileName; //Saved File's Name M2xUs private int nSplitter; //Count of Splited Downloading File T[Gz }4
$EN jilO% " public SiteInfoBean() D[-Ct {//nSplitter的缺省值为5 D[tGbk //default value of nSplitter is 5 }p- %~Y this("","","",5); B!tte) } vY;Lc [\.>BK -x_iqrB public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) >8AtT=}w { 8dZH&G@; sSiteURL= sURL; .`h+fqa sFilePath = sPath; O3BU.X1'% sFileName = sName; to?"{ this.nSplitter = nSpiltter; z:fhq:R( pP/o2 #ASu
SQ } lmc-ofEv 8v6rS-iHP `UJW:qqW public String getSSiteURL() v'@LuF'e8 { ^#t<ILUa return sSiteURL; SQ1&n;M}f } eqf~5/Z /gdo~ $OhL
95}7 public void setSSiteURL(String value) <%Rr-, { Fh/C{cX9g sSiteURL = value; =H?Nb:s } G?_,( 5g5pzww '#Fh
J%x public String getSFilePath() #62ww-E~ { .z4FuG,R return sFilePath; *oWzH_ } =N0cz% =~S
o{Ep/O` public void setSFilePath(String value) uJ y@ { $Yxy(7d7w sFilePath = value; d!X?R} } ]s SoIT 2M1mdkP3 ky%%H; public String getSFileName() .R"L$V$RU. { X5yh S return sFileName; N|)V/no 6 } 1lQ10J b>(lF%M Dm^kuTIG public void setSFileName(String value) f:0n-me { n%0vQ;Z1 sFileName = value; u'b_zlW@ } )K6{_~Kc\ '[E_7$d xr2:bu public int getNSplitter() }<S2W\,G { LYFvzw>M return nSplitter; -XyuA:pxx } H}~^,B2; srkOad <KA@A} public void setNSplitter(int nCount) /W>"G1) { 7L6M#B[)e5 nSplitter = nCount; ?n+\T'f! } q<8HG_ } Z}C%%2Iz aKy|$
{RC E;Hjw0M'k /* {cI<4>< **Utility.java J)->
7h= */ A~>=l= package NetFox; y_&XF>k91 X9j+$X\j =R"tnjR public class Utility { N-|Jj?c bW|y -GM O5?Eb public Utility() yB1>83!q { gk#rA/x f+Go 8Lg=M 3"n8B6 } "lZ<bG
jFv<]D%A[ //线程睡眠 Uy:.m public static void sleep(int nSecond) ?0a 0 R { hdL2`5RFF try{ MO/N*4U2 Thread.sleep(nSecond); n}?G!ySg } 7A6sSfPUy catch(Exception e) }b(e { J5T#}!f e.printStackTrace (); BxU1Q& } K=)R!e8 } DeSTo9A}! xW4+)F5P( //日志 Fm':sd)'X public static void log(String sMsg) dFFqs&c Q { QR'g*Bro System.err.println(sMsg); kDh(~nfj } +GS=zNw# ;gnr\C*G W!X]t)Ow public static void log(int sMsg) c,wU?8Nc|$ { /f<(K-o] System.err.println(sMsg); 1n"X?K5;A } &L]*]Xz; } !y?hn$w0 sQs5z~#51* zOdKB2_J7 /* sD+G+ **TestMethod.java E=NY{| > */ {SJ7Yfs package NetFox; ?<QFW#:) !?/bK[
P, Uzn|)OfWP public class TestMethod { QO/7p]$_ \[EWxu I "2FTGA public TestMethod() 5.#9}] { ///xx/weblogic60b2_win.exe >}*jsqaVU try{ z:5ROlk0 SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); G{~p.?f: //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); E5{)d~q SiteFileFetch fileFetch = new SiteFileFetch(bean); z]AS@}wWqg fileFetch.start(); @\8gzvkt } A#:
c catch(Exception e){e.printStackTrace ();} mU$7_7V~ 8v
1%H8 Z-a(3& } yZ$;O0f&& ?/MXcI( ~[q:y|3b public static void main(String[] args) `&zobbwq { 1I_q3 { new TestMethod(); s[4!R&b } 63Yu05' } qXGLv4c`Q 点击下载更多相关资料
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