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/* %0INtq **SiteFileFetch.java rB?u.jn0T */ WM: ~P$%cx package NetFox; 2 8SlFu? import java.io.*; rui}a=rs import java.net.*; [e3|yE6 9:A>a3KOH '*!R
gbj; public class SiteFileFetch extends Thread { *jGB/ y [6 wI22 [V{JuG;s SiteInfoBean siteInfoBean = null; //文件信息Bean KoiU\r long[] nStartPos; //开始位置 PqPLy long[] nEndPos; //结束位置 "%urT/Fv& FileSplitterFetch[] fileSplitterFetch; //子线程对象 %H>vMR-,~ long nFileLength; //文件长度 /V~L:0% boolean bFirst = true; //是否第一次取文件 P~_CDh.N boolean bStop = false; //停止标志 0{v? File tmpFile; //文件下载的临时信息 {b^naE DataOutputStream output; //输出到文件的输出流 [ar:zlV8 xj{X#[q): //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) hiaj!&+Q public SiteFileFetch(SiteInfoBean bean) throws IOException G6JyAC9j { 3`TC* siteInfoBean = bean; v Q+}rHf`[ //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); 3k;U#H tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); vi4 1` if(tmpFile.exists ()) )&+_T+\ { BArsj bFirst = false; nen6!bw4 read_nPos(); E{T\51V]% } GWjKZ1p else Jkpw8E7 { XZcsx nStartPos = new long[bean.getNSplitter()]; uA
C:& nEndPos = new long[bean.getNSplitter()]; h\'GL(?DBI } Yp 6;Y7^ qt/syF&s pPo?5s 'e3y| } x~ s> H; TmG<S 34YYw@?}Y public void run() Mn>dI@/gM { Ou2H~3^PL //获得文件长度 z"}k\B-5 //分割文件 jm RYL(" //实例FileSplitterFetch X]cB`?vR //启动FileSplitterFetch线程 }Bc'(2A;, //等待子线程返回 ?#}=!$p try{ :m8ED[9b if(bFirst) kjaz{&P { n#z^uq|v nFileLength = getFileSize(); |GK [I if(nFileLength == -1) 3mWo`l { rctn0*MP System.err.println("File Length is not known!"); lx$Y-Tb^F } \^Y#"zXo1 else if(nFileLength == -2) Ep 5lmzg { l]WV?^* System.err.println("File is not access!"); a47Btd'm } 8o -?Y.2 else ]~WP;o { ?[RG8,B for(int i=0;i<nStartPos.length;i++) vR,HCI { hp-<8Mf nStartPos = (long)(i*(nFileLength/nStartPos.length)); ,z1# |Y } n/$Bd FH for(int i=0;i<nEndPos.length-1;i++) YL){o$-N"J { G8u8&| nEndPos = nStartPos[i+1]; ^l$(- #'y } YD.3FTNGC nEndPos[nEndPos.length-1] = nFileLength; [ R~+p#l+Q } h4?+/jk7 } f@LUp^Z/v wB9IP{Pf KNY<"b //启动子线程 Xid>8 fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; DIk$9$"<x for(int i=0;i<nStartPos.length;i++) X'kw5P!sq { ]2h[.qa fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), ~%#?;hJ siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), *}/xy
SH3 nStartPos,nEndPos,i); &51/Pm2O Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); l06 q1M 3 fileSplitterFetch.start(); "b1_vA]03 } I.KYWs // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), L+I[yJY:! siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); Q~xR'G[N // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", 1'aS2vB9 nEndPos = " + nFileLength); xR_]^Get // fileSplitterFetch[nPos.length-1].start(); .z[+sy_ g!~j
Wn?A gKYn* //等待子线程结束 uXhp+q\ //int count = 0; "*7I~.7U(* //是否结束while循环 e\yj>tQJg boolean breakWhile = false; UD9h5PgT s|,]Nb=z/ ZM|>Va/X while(!bStop) b%oma{I=.c { G x,D'H' write_nPos(); 1c}'o*K_% Utility.sleep(500); nn=JM7e\9 breakWhile = true; 1Rczf (,aT fLD9RZ8_ _eO] awsA for(int i=0;i<nStartPos.length;i++) [w{ZP4d> { whLske- if(!fileSplitterFetch.bDownOver) R
+\y". { Rp@u.C< breakWhile = false; ux=a9 break; yBl<E$= } 8vT:icl } 2sU"p5 j if(breakWhile) BKDWd]KEf break; 4U6{E# RtIc:ym {xH
\!!"T //count++; /ZzlC#` //if(count>4) %kc g#p+tE // siteStop(); RU{}qPs? } ;zCHEz TuF:m"4 B"qG-ci System.err.println("文件下载结束!"); 5=?&q 'i } ?DRC!
9o^ catch(Exception e){e.printStackTrace ();} ]!A;-m } K[ \z'9Q hV,3xrm?P *jJ62-o //获得文件长度 VLO>{"{' public long getFileSize() kEXcEF_9P { p0tv@8C> int nFileLength = -1; v4v+;[a% try{ K&X'^|en URL url = new URL(siteInfoBean.getSSiteURL()); o?b%L HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); AH7k|6ku<* httpConnection.setRequestProperty("User-Agent","NetFox"); 0)/214^& )8<X6 c8'8DM int responseCode=httpConnection.getResponseCode(); I#Bz
UF if(responseCode>=400) g@U#Y#b@" { o}%fs
* processErrorCode(responseCode); `j(+Y return -2; //-2 represent access is error T2-> } $?s^HKF~ s{IoL_PJP aQG#bh [ String sHeader;
jPs+i B@=Yj_s kDz.{Ih for(int i=1;;i++) UP`q6]P { $YC~02{ //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); $e_ps~{7$ //Utility.log(in.readLine()); Wp]EaYt2D sHeader=httpConnection.getHeaderFieldKey(i); g|zK%tR_P if(sHeader!=null) ]S:@=9JB' { H|!s. if(sHeader.equals("Content-Length")) v]J# SlF { 7 dzE"m nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); \%C[l break; yjr@v!o } KF'M4P } NV gLq@F else ~mp$P+M(%p break; t,+S~Cj| } iWCV(! } Z-<u?f8{* catch(IOException e){e.printStackTrace ();} joA+ catch(Exception e){e.printStackTrace ();} }ot _k- O`u! P\ Om^/tp\ Utility.log(nFileLength); O7\s1
V; (LfVa`<1 7X|r';"?i
return nFileLength; {#%xq]r_ } Y;w]u_ }-vBRY y(dS1.5F //保存下载信息(文件指针位置) Z~uKT n private void write_nPos() br;G5^j3? { ]M2<I#hF. try{ ./
:86@O output = new DataOutputStream(new FileOutputStream(tmpFile)); ]/bE${W*] output.writeInt(nStartPos.length); i#lo?\PO> for(int i=0;i<nStartPos.length;i++) ypd?mw&1} { 4yA`);r62 // output.writeLong(nPos); 6+5Catsn output.writeLong(fileSplitterFetch.nStartPos); Z]Y4NO; output.writeLong(fileSplitterFetch.nEndPos); ]Rye AJ3 } AAW7@\q. output.close(); *p3P\ H^5 } c{Kl?0#[ catch(IOException e){e.printStackTrace ();} nADd,|xD3 catch(Exception e){e.printStackTrace ();} LC{hoq\ } mig3.is (HI%C@e9 b8>9mKs //读取保存的下载信息(文件指针位置) !_) ^bRd private void read_nPos() (Pd>*G\ { qJA.+q.e$e try{ f
99PwE(= DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); uE j6A int nCount = input.readInt(); GU3/s&9 nStartPos = new long[nCount]; 0f^.zt{T nEndPos = new long[nCount]; qfu2}qUX~% for(int i=0;i<nStartPos.length;i++) \2pFFVT
{ At(9)6n8 nStartPos = input.readLong(); 9C;Y5E~'L nEndPos = input.readLong(); a1SOC=.M; } 05B+WJ1 input.close(); ^ kvH/ Y& } =on!&M catch(IOException e){e.printStackTrace ();} qD*\}b]9I
catch(Exception e){e.printStackTrace ();} 3\r@f_p } 1omvE9
%zM M7R&J'SAY suFOc private void processErrorCode(int nErrorCode) (Fzh1# { Ki/5xK=s System.err.println("Error Code : " + nErrorCode); Xp6*Y1Y
} k_<{j0z. K9Xd?
]a oxQID //停止文件下载 b0Ov+ )7# public void siteStop() rJZs
5g` { Treh{s bStop = true; :ZS8Zm" for(int i=0;i<nStartPos.length;i++) o?K|[gNi fileSplitterFetch.splitterStop(); ~e77w\Q0 v\(m"|4(i "P5bYq%0v } ]H#Rm#q } q'F_j" //负责部分文件的抓取 Xm:=jQn **FileSplitterFetch.java $;uWj| */ *rcuhw"^b# package NetFox; 0j!ke1C&C b2X'AHK S ?ZHE8 import java.io.*; =j+oKGkoCa import java.net.*; x56
F Cxk$"_ (_qBsng: public class FileSplitterFetch extends Thread { 207 O["Y 7s8<FyFsjd E[3FdX8 String sURL; //File URL w}W@M,.^ long nStartPos; //File Snippet Start Position y|;8 :b32 long nEndPos; //File Snippet End Position FK@ f' int nThreadID; //Thread's ID mE^tzyh boolean bDownOver = false; //Downing is over O<dZA=Oez boolean bStop = false; //Stop identical u@bOEcxK FileAccessI fileAccessI = null; //File Access interface o%+A<Ri Z0"& |c
oEBFG public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException d@6:|auO { 5G'&9{oB this.sURL = sURL; c[h'`KXJf- this.nStartPos = nStart; t}XB|h this.nEndPos = nEnd; #'4<> G] nThreadID = id; WE 5"A|
= fileAccessI = new FileAccessI(sName,nStartPos);//定位 ^%oG8z,L } zY+t ,2z WAwfL? hnsa)@ public void run() F9k
I'<Q { jTd4 H) while(nStartPos < nEndPos && !bStop) mo|PrLV { 9B+ zJ Vte Ufaqhh uP%axys try{ f/0v'
Jt URL url = new URL(sURL); us\%BxxI9 HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); S2'`|uI httpConnection.setRequestProperty("User-Agent","NetFox"); m~Y'$3w String sProperty = "bytes="+nStartPos+"-"; lPRdwg- httpConnection.setRequestProperty("RANGE",sProperty); vbRrk($` Utility.log(sProperty); x2j/8]'o vh|Tb5W< Jt-XmGULB InputStream input = httpConnection.getInputStream(); (#j2P0B //logResponseHead(httpConnection); <\1}@?NGC _.d}lK3$2 jiA5oX^g byte[] b = new byte[1024]; >/TB_ykb int nRead; "pSH!0Ap\ while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) HA^jk%53 { E8T"{
R80 nStartPos += fileAccessI.write(b,0,nRead); |5oKq'(b //if(nThreadID == 1) {yvb$ND|j{ // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); Y!++CMzU } Y<p zy8z pu/m8
F=oHl@ Utility.log("Thread " + nThreadID + " is over!"); [2GXAvXsT bDownOver = true; T!u'V'Ei2 //nPos = fileAccessI.write (b,0,nRead); :DZLjC } ,}9f(` catch(Exception e){e.printStackTrace ();} js:C
mnI } do:QH.q8) } CS~=Z>6EjA uY&=eQ_Cb Cz'xGW{ //打印回应的头信息 ]j& FbP)3 public void logResponseHead(HttpURLConnection con) +M44XhT { ftYR,!& for(int i=1;;i++) b@=zrhQ { RH!SW2o< String header=con.getHeaderFieldKey(i); H|PrsGW if(header!=null) 'R^iKNPs //responseHeaders.put(header,httpConnection.getHeaderField(header)); ^G}# jg. Utility.log(header+" : "+con.getHeaderField(header)); >Hdjsu5{N else vP3K7En break; uz*d^gr} } E4Y"X } -'80>[}q/ 7<h.KZPc ixOEdQ public void splitterStop()
Y3-]+y%l { q{a#HnZo" bStop = true; e{,!|LhpQ } yJnPD/i ]UK`?J=t2g :&Qb>PH[ } 'n~fR]h} sS
C?io OI~}e,[2z /* ]}BB/KQy^ **FileAccess.java CfQf7- *//文件访问(定位,写) fH-NU-" package NetFox; j h;
9
[ import java.io.*; iPMB$SdfO ,+~2&>wj 0;}Aj8Fle public class FileAccessI implements Serializable{ j._G7z/LJ ;5<P|:^ //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 0r1g$mKb RandomAccessFile oSavedFile; -Bj.hx* long nPos; f.@Xjf BRe{1i 6 R"NGJu9 public FileAccessI() throws IOException >OT\~C { LRWOBD this("",0); 5!<o-{J[(= } #-,g&)`] %>i@F=O2< zCBplb public FileAccessI(String sName,long nPos) throws IOException /v5qyR7an { rxQ<4 oSavedFile = new RandomAccessFile(sName,"rw"); ICk(z~D~ this.nPos = nPos; WS5A Y @(~ oSavedFile.seek(nPos); -<6v:Z } ]K7`-p~T x7f:F. !;i*\
a public synchronized int write(byte[] b,int nStart,int nLen) 5!~!j
"q { S0F@#mSQ? int n = -1; fVYiwE=F try{ LaDY`u0G% oSavedFile.write(b,nStart,nLen); 9J?W '8s5 n = nLen; -)X{n?i } w5,6$# catch(IOException e) RYt6=R+f { J=):+F= e.printStackTrace (); 5lO^;.cS, } %8
qSv%_ t')h{2&&!2 `Z:3`7c return n; ;J'OakeVO } c)03Ms4
D _D-5}a" 3g;T?E } YX_vv!-] A]j}' u)7*Rj^ /* Hr6wgYPi **SiteInfoBean.java H "O$& */ '| &,E#` package NetFox; 8hZwQ[hr Q? qjWZY ms7SoYbSu public class SiteInfoBean { IQIbz{bMx $Buf#8)F* %bXsGPB private String sSiteURL; //Site's URL ^T{8uJ'kn private String sFilePath; //Saved File's Path ?NlSeh private String sFileName; //Saved File's Name :Dayv6g private int nSplitter; //Count of Splited Downloading File Ih()/( Yq
J]7V\ [.a;L"> public SiteInfoBean() Mm.Ql {//nSplitter的缺省值为5 %]#VdS|N //default value of nSplitter is 5 AeaPK this("","","",5); k Q~ %=pn } |#V(p^ ge$LIsE8 (`pNXQ0n public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) 9\>sDSCx { Jh?z=JY sSiteURL= sURL; QF.3c6O@ sFilePath = sPath; kxh 5}eB sFileName = sName; /~*Cp9F"] this.nSplitter = nSpiltter; /1[gn8V691 0V3gKd7 EI\v } g#qNHR P_}/#N{C 7b46t2W< public String getSSiteURL() y:,9I`aW { 8?1o<8hV return sSiteURL; Mn@$;\: } xg} ug[ <BPRV> 0X 4>YU8/Rw public void setSSiteURL(String value) Oqmg;\pm { 61Bhm:O5W sSiteURL = value; d&u7]<yDA } ZBJ3 VK -w ~(3( Q&PB]D{ public String getSFilePath() MRs,l' { sP y2/7Wqd return sFilePath; xs%LRF#u } U` hfvTi 8R}K?+] @!<d0_dnC public void setSFilePath(String value) 7 2,"Cj { +T2HE\ sFilePath = value; Qci$YTwl> } jTfi@5aPY o%`npi1y ik5|,#}m& public String getSFileName() LwOJ|jA(, { > :Ze4}( return sFileName; i3PKqlp. } 2tf6GX: xnbsg!`;7W N_G4_12( public void setSFileName(String value) e:OyjG5_ { 6/6Rah! sFileName = value; *b"CPg/\ } ;'HF'Z "OL~ul5 -CD\+d " public int getNSplitter()
<uD qYT$6 { =VSkl;(O return nSplitter; 2]2H++ } C),7- ? /K|:9Q$K6 FZXyfZw!| public void setNSplitter(int nCount) kXwi{P3D$ { {155b0 nSplitter = nCount; .GCR!V } ?4G(N=/& } JMlV@t7y< w!`Umll2 cJ/]+|PQ /* //.>>-~1m **Utility.java U-EhPAB@ */ "K?Q package NetFox; ?z=\Ye5x U=cWmH QU/3X 1W public class Utility { tg 85: Nfw YDY wqy^8N[K] public Utility() %{C)1*M7 { >SDpuG&> f^9&WT PZ,z15PG] } >uy%-aXiVa P`TIaP9%E //线程睡眠 +xj "hX>3 public static void sleep(int nSecond) IgM
v =^U { yC
!/PQ" try{ %idk@~H Cg Thread.sleep(nSecond); 0@pu@ DP~ } hz\WZ^ catch(Exception e) l67KJ { i- lKdpv e.printStackTrace (); KDey(DN: } "8(U\KaX } eH
<Jng vM4<d> //日志 .Yx_:h=u public static void log(String sMsg) 4D"4zp7 { 6)[<)?A.[ System.err.println(sMsg); #3MKH8k&~ } {TAw)!R~ \%5MAQS r]LCvsVa public static void log(int sMsg) %8FN0 { ut&/\k=N System.err.println(sMsg); 6 h'&6 } ;7rv } 6G_<2bO u7=T(4a YaL]>.;Z:" /* k+1gQru{d **TestMethod.java t;47(U */ #C*&R>IvY package NetFox; ]ii+S"U3 u) *Kws WRpyr public class TestMethod { ,X/- +K{LQsR] j*zD0I] public TestMethod() C6QbBo { ///xx/weblogic60b2_win.exe T PYDs+U try{ T~ k)uQ SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); #H5=a6E+q //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); Ty+I8e]{ SiteFileFetch fileFetch = new SiteFileFetch(bean); )`?%]D fileFetch.start(); V3.t;.@ } zxKCVRJ catch(Exception e){e.printStackTrace ();}
%}b8aG+ LM.`cb;?G Zdn!qyR` } h-mTj3p-K O4Dr ]Xc] ~<ri97) public static void main(String[] args) PW)aLycPK { =~|:t&v=c new TestMethod(); {THqz$KN } |y1;&< } GAl+Zg## 点击下载更多相关资料
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