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/* m|{^T/kIbQ **SiteFileFetch.java -eyF9++` */ 3]mprX' package NetFox; kmc"`Ogotw import java.io.*; 8(L2w|+B< import java.net.*; n-l_PhPQ` e(|Z<6 +,LWyvc' public class SiteFileFetch extends Thread { 'hs4k|B HdB>CVuh 4\
Xaou2V[ SiteInfoBean siteInfoBean = null; //文件信息Bean m:[I$b6AY long[] nStartPos; //开始位置 '6&o:t long[] nEndPos; //结束位置 TEd5&Z FileSplitterFetch[] fileSplitterFetch; //子线程对象 L-D4>+ long nFileLength; //文件长度 Hcu!bOQ boolean bFirst = true; //是否第一次取文件 /YHO"4Z boolean bStop = false; //停止标志 m x |V) File tmpFile; //文件下载的临时信息 3c3;8h$k DataOutputStream output; //输出到文件的输出流 1*dN. v:5 6Jb0MX"AVr //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) uMZ~[Sz public SiteFileFetch(SiteInfoBean bean) throws IOException :e;6oC*"q { *S:~U siteInfoBean = bean; nf 8V:y4 //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); ,mp<<%{u tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); 7`;sX?R if(tmpFile.exists ()) wb?k { f/#Id]B bFirst = false; eQu(3 sYb read_nPos();
1?FG3X 5 } X%IqZ{{ else A%W]XEa<
{ jo<xrn\ nStartPos = new long[bean.getNSplitter()]; K%\r[NF nEndPos = new long[bean.getNSplitter()]; #[{{&sN } ?0qD(cfx< /)Cfm1$ic e,e(t7c?d /h+ W L } .k]`z>uv <lf692.3 D0FX"BY7 public void run() .s*N1
U?h { ?IHt T3'Rt //获得文件长度 xj>P5\mW# //分割文件 Intuda7e1 //实例FileSplitterFetch JVX)>2&$ //启动FileSplitterFetch线程 5+M,X kg //等待子线程返回 OA&'T*)-A6 try{ }h45j84) if(bFirst) $kTm"I { u_^mN9h nFileLength = getFileSize(); 8c)GUx if(nFileLength == -1)
|gO7`F2 { l'EO@D/M System.err.println("File Length is not known!"); h8`On/Ur_8 } A,<5W } else if(nFileLength == -2) 2j%=o?me^p { y2_rm System.err.println("File is not access!");
)Ri! } wG[nwt0L else {q)d { V
,p~,rC for(int i=0;i<nStartPos.length;i++) %(W&(eN { q8d](MaX nStartPos = (long)(i*(nFileLength/nStartPos.length)); =m2_:&@0x } aKriO for(int i=0;i<nEndPos.length-1;i++) ),p0V
{ Z|n|gxe nEndPos = nStartPos[i+1]; =Q(J!f } (uvQ/! nEndPos[nEndPos.length-1] = nFileLength; U_*,XLU } @\?ubF } *ai~!TR ?4R%z([X7 7(+4^ //启动子线程 e&z@yy$
fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; `#ruZM066 for(int i=0;i<nStartPos.length;i++) ?A|JKOst] { t,fec>. fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), v-z%3x.f siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), 66pjWS
{X nStartPos,nEndPos,i); 1;( h0j Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); ~6i'V?> fileSplitterFetch.start(); Gf"TI:xa } / rc[HbNg. // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), [L+*pW+$\. siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); fG'~@'P~ // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", VG
5*17nf5 nEndPos = " + nFileLength); VBL4cU8D // fileSplitterFetch[nPos.length-1].start(); OWewV@VXR Wz'!stcp hEB5=~A_ //等待子线程结束 G*N[t w //int count = 0; 5bt>MoKxv //是否结束while循环 ~wDXjn"U& boolean breakWhile = false; p Run5 )7 ,kJ7c;:i v]( Y n)# while(!bStop) o9e8Oj& { MG vz-E1e write_nPos(); Dq<la+VlO Utility.sleep(500); J|
N 6r breakWhile = true; 4 -tC=>>wc xw9ZRu<z ~g=&wT11 for(int i=0;i<nStartPos.length;i++) Fy{yg]O" { d2UidDU5qa if(!fileSplitterFetch.bDownOver) N-upNuv { c7r(&h breakWhile = false; YAc:QVT87 break; )oCL![^pXe } HMF2sc$N } fc3 nQp7 if(breakWhile) }%Mdf6LS64 break; <u\Hy0g xJ$uoy3+ ,A{Bx`o? //count++; A8&@Vxdz //if(count>4) 8S#$'2sT // siteStop(); }eVDe(7_ } 8s6[-F5 B9NUafK= "a[;{s{{. System.err.println("文件下载结束!");
!tTv$L> } r[!~~yu/o catch(Exception e){e.printStackTrace ();} }9\_s* } \]<R`YMV @
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3B1X //获得文件长度 4JK6<Pk public long getFileSize() 29J|eBvxx { :<P4=P P int nFileLength = -1; <}WSYK,zUY try{ 6HCg<_j] URL url = new URL(siteInfoBean.getSSiteURL()); w0g@ <(
3 HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); # QwX|x{ httpConnection.setRequestProperty("User-Agent","NetFox"); V5lUh#@TN& 6 EqN>. dQIF'==6 int responseCode=httpConnection.getResponseCode(); 7#C$}1XJ1 if(responseCode>=400) ;t +p2i { T@ESMPeU:X processErrorCode(responseCode); 5Yv*f: return -2; //-2 represent access is error AVjRhe } R_G2C@y* .eIs$ b<y*:(: String sHeader; 7=N%$]DKZ o`n8Fk}i l\
dPfJ for(int i=1;;i++) 9!=4}:+ { a&G{3#l //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); :.AC%'S //Utility.log(in.readLine()); _:\rB sHeader=httpConnection.getHeaderFieldKey(i); CfW#Wk:8J if(sHeader!=null) !X7z y9 { G)~>d/ if(sHeader.equals("Content-Length")) SHYekX { D-@6 hWh~ nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); ]7<$1ta break; CL2zZk{u_ } di_UJ~ } fZf>>mu@r' else LNJKf6: break; huv|l6 } a"P &
9c } e/Z{{FP%6 catch(IOException e){e.printStackTrace ();} 6?}|@y^fb catch(Exception e){e.printStackTrace ();} ,2!7iX mIf)=RW BsXF'x<U* Utility.log(nFileLength); i +@avoW 4}D&=0IZ H%n/;DW return nFileLength; j6^.Q/{^ } l1zPL3"u_^ *H/)S 5 !Yo2P" //保存下载信息(文件指针位置) _K?v^oM# private void write_nPos() vrmMEWPV { JUw|nUnl? try{ NUiv"tAY output = new DataOutputStream(new FileOutputStream(tmpFile)); r^.9
|YM5 output.writeInt(nStartPos.length); 8ZV!ld for(int i=0;i<nStartPos.length;i++) K
@&c { Q-h< av9 // output.writeLong(nPos); ~uY5~Qs9G output.writeLong(fileSplitterFetch.nStartPos); U!+O+( output.writeLong(fileSplitterFetch.nEndPos); hFoeVM[h } 0o 7o;eN output.close(); -U>)B
} [i~@X2:Al catch(IOException e){e.printStackTrace ();} Z-t qSw8n catch(Exception e){e.printStackTrace ();} pD P*
3 } 6$PQ$ OkQ<
Sc ?_{{iil //读取保存的下载信息(文件指针位置) TQt[he$O private void read_nPos() 9r\p4_V { zfUj%N try{ n=rmf*,? DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); l{r HXST| int nCount = input.readInt(); g NE"z nStartPos = new long[nCount]; Ld:-S,2 nEndPos = new long[nCount]; a$uDoi for(int i=0;i<nStartPos.length;i++) 6G4~-_ { [D|Uwq nStartPos = input.readLong(); M&Q&be84 nEndPos = input.readLong(); uAYDX<Ja9 } 0Q> input.close(); FFwu$S6e } HRahBTd(z catch(IOException e){e.printStackTrace ();} BpFXe7 catch(Exception e){e.printStackTrace ();} Y"5FK } @pvQci A5fzyG Kk.\P|k2 private void processErrorCode(int nErrorCode) 'yOx&~H] { #( 4)ps. System.err.println("Error Code : " + nErrorCode); C]ho7qC } qzY:>>d' 3 P\4K 'u PI~l`g //停止文件下载 JvT#Fxj k public void siteStop() @B+8' b$9 { y\6C9%. bStop = true; h{]0
H'g for(int i=0;i<nStartPos.length;i++) qoQ,3&< fileSplitterFetch.splitterStop(); wMm+E "}W 6a]Qg99\ Nsy>qa7 } h/aG."U } G^P9_Sw]d3 //负责部分文件的抓取 ,
Z1 &MuV **FileSplitterFetch.java rIv#YqT */ IH=%%AS package NetFox; Ka{QjW!%d< suX^"Io%! jxw8jo06: import java.io.*; *W}nw$tnBX import java.net.*; bA"*^"^ 7'.6/U s?sr0HZ public class FileSplitterFetch extends Thread { ayf;'1 q|B.@Ng. $f"Ce,f String sURL; //File URL _}H`(d%N long nStartPos; //File Snippet Start Position <aMihT)dd long nEndPos; //File Snippet End Position 's8LrO(= int nThreadID; //Thread's ID d8jP@> boolean bDownOver = false; //Downing is over =6'D/| 3 boolean bStop = false; //Stop identical $xcU*?=K FileAccessI fileAccessI = null; //File Access interface O[}2 ac43d`wpK yW(A0 public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException @`sZV8 { z[+pN:47 this.sURL = sURL; *q1sM#;5 this.nStartPos = nStart; KH$o X\v this.nEndPos = nEnd; >va9*pdJ nThreadID = id; OYfP!,+bn fileAccessI = new FileAccessI(sName,nStartPos);//定位 ui*CA^ Y } "y .(E7 6 #=fd8}9 /h!iLun7I public void run() v Dph}Z { #Nv0d|0\ while(nStartPos < nEndPos && !bStop) G;msq=9| { 5)K?:7 =-uk7uZM 7:)$oH try{ #0M,g URL url = new URL(sURL); XR)I,@i`' HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); KDAZG+u+ httpConnection.setRequestProperty("User-Agent","NetFox"); JR/^Go$^ String sProperty = "bytes="+nStartPos+"-"; SI l<\ httpConnection.setRequestProperty("RANGE",sProperty); _@]@&^K$E Utility.log(sProperty); K@=_&A! -QydUr/(o \xtmd[7lb< InputStream input = httpConnection.getInputStream(); j98>Jr\ //logResponseHead(httpConnection); u $T'#p1
<Y#EiC. /I#SP/M&l byte[] b = new byte[1024]; / ='/R7~ int nRead; z:tu_5w!, while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) [~rBnzb { j0K}nS\ P nStartPos += fileAccessI.write(b,0,nRead); ~Ywt o //if(nThreadID == 1) dLu3C-.( // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); 1j^FNg~ } S|v-lJ/I ki_Py5 852Bh'u_ Utility.log("Thread " + nThreadID + " is over!"); h3L{zOff bDownOver = true; kF *^" Cn //nPos = fileAccessI.write (b,0,nRead); Kd,7x'h`E } BBm;QOBU catch(Exception e){e.printStackTrace ();} A?OaP } GfT`>M?QGK } 6t6#<ts !Zf)N_k ,ffH:3F //打印回应的头信息 KbF,jm5 public void logResponseHead(HttpURLConnection con) d\aU rsPn { U_c9T> = for(int i=1;;i++) ur`:wR] 2? { 2f@gR9T String header=con.getHeaderFieldKey(i); JS1''^G&. if(header!=null) [VwoZX: //responseHeaders.put(header,httpConnection.getHeaderField(header)); (%EhkTb Utility.log(header+" : "+con.getHeaderField(header)); IE9A _u* else xk5Z&z break; 7L&=z$U@m } G8oOFBQD } l<RztzUw (f|3(u'e? pVm'XP public void splitterStop() GKKf#r74 {
fg1["{\ bStop = true; snyg } vSy#[9} B?J#NFUb U_c.Z{lC4 } ]`Y;4XR u($y<Q)= K%A:W /* hK&/A+* **FileAccess.java <$'OSN`! *//文件访问(定位,写) GoNX\^A package NetFox; ,0=:06l import java.io.*; "+V.Yue`R pTlNJ!U> J@c)SK%2h public class FileAccessI implements Serializable{ k:0HsN!F9 \{[Gdj` //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 `8%2F}x}qD RandomAccessFile oSavedFile; ;u0MY long nPos; $k|k 5cP8x }l>0m &8 ~+^P1w public FileAccessI() throws IOException hqVFb.6[ { H`;q@ this("",0); Fh4kd>1D } a$SGFA}V 14p <0BG fWywegh public FileAccessI(String sName,long nPos) throws IOException 0x\bDWZ_ { TPrqb oSavedFile = new RandomAccessFile(sName,"rw"); Gt^Fj&^ this.nPos = nPos; OXuBtW*,z+ oSavedFile.seek(nPos); q8{)27f, } C-abc+/ ;X
]+r$_ dk9'C public synchronized int write(byte[] b,int nStart,int nLen) |A#pG^ { @e_ bG@ int n = -1; j\D_Z{m2 try{ |BGQ|7DyG oSavedFile.write(b,nStart,nLen); hX~d1.]Y n = nLen; y pv~F } OFTyN^([@ catch(IOException e) }Zue?!KQ { I|*w?i* e.printStackTrace (); emo@&6* } }0Qex=vkO CD'.bFO^+T ?[}r& f return n; ~e5hfZv|w } ew#t4~hh WCc,RI0 %># VhK } %(IkUD 9"3 7va K"O+`2$ /* OsMU>v }m **SiteInfoBean.java \ s8j* */ |gW>D=rkj package NetFox; FabzP_<b +pcpb)VL /d*0+m8 public class SiteInfoBean { RG9YA&1ce )DS|mM) r
wtU@xsD private String sSiteURL; //Site's URL )A}u)PH4O private String sFilePath; //Saved File's Path dC$z q~q private String sFileName; //Saved File's Name 6px(]QU private int nSplitter; //Count of Splited Downloading File -s5j^U{h| [eebIJs [%M=nJ{8 public SiteInfoBean() Wm{Lg0Nr {//nSplitter的缺省值为5 :nZVP_d+ //default value of nSplitter is 5 ?8AchbK;N this("","","",5); @7Oqp- } 7cTDbc!E- !=7(3<? ]_6w(>A@3# public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) gJE m { J3OxM--8" sSiteURL= sURL; 1&JPyW sFilePath = sPath; eM";P/XaX sFileName = sName; ToWiXH)4 this.nSplitter = nSpiltter; @kCFc} 5hN`}Ve RjC3wO:: } +>b~nK>M DlHt#Ob7 [ZC{eg+D public String getSSiteURL() v803@9@ { WZ\bm$
return sSiteURL; A
dNQS } LO8`qq*rq SJg4P4| V(hM@ztN public void setSSiteURL(String value) F7!g+LPc< { ,Jm2|WKH sSiteURL = value; jlvh'y` } '
U]\]Wp x3j)'`=15 J:<mq5[ public String getSFilePath() .E H&GX { ws1io. return sFilePath; l`S2bb6uMR } #aX+?z\4 )k)HQcfjD r%`g` It public void setSFilePath(String value) 1>I4=mj { ]_!5g3VQh sFilePath = value; >|{n";n& } U($bR|%D LH7m >/LJr F|+Qi BO public String getSFileName() .
V5Pr}"y { <'n'>@ return sFileName; )ry7a
.39b } US5 ]@! "DN0|%`M/ SlU?,)J} public void setSFileName(String value) d 8YP<"V& { MI^@p`s sFileName = value; tB S+?N } Blw AD Q=YIAGK *0vq+C public int getNSplitter() O;zq(/,-l { I5#KLZVg return nSplitter; t zn1| } cQg:yoF 4= 7#=F1 \9
,a"g public void setNSplitter(int nCount) !3O8B0K)v { O52B nSplitter = nCount; 73Zx`00 } JWZG)I]r } 8
5 L< GkwdBy+ /!7 /* bsuGZ **Utility.java z):LF< */ b/[$bZD5o package NetFox; voX4A
pl O0Z!*Hy ^/6LVB * public class Utility { 1zNh&
" vIq>QXb;d <M){rce public Utility() VQ}N&H)` {
}?eO.l{ p{@j M FIMM\W
} u[:-^H rY?]p Mp //线程睡眠 a/wg%cWG_ public static void sleep(int nSecond) s9# WkDR { PHAM(iC&D try{ Dj9v9 Thread.sleep(nSecond); D02'P{ } YCPU84f catch(Exception e) hwx1 fpo4 { aB_~Vh e.printStackTrace (); 2ezk<R5q+ } nYsB^Nr6 } /Fr*k5I Ez1-Nx //日志 ylGT9G19 public static void log(String sMsg) ?^3Y+)} { 14~#k%zO( System.err.println(sMsg); FhP$R}F } ;B^ 9sr nyoLrTs{ '048Qykt; public static void log(int sMsg) } yb"/jp { tZXq<k9 System.err.println(sMsg); (Sv=R(_s } ;W 3#q: } H\%^n<]# "g5<j p ge#0Q L0K /* 5)c B\N1u **TestMethod.java Lo<WK */ ?]%ZJd package NetFox; i,h)VCc T^ )\ m$.7) 24 public class TestMethod { SuR+Vv d53Eu`QW? w#d7 public TestMethod() !U7}?i&H { ///xx/weblogic60b2_win.exe mI,a2wqi try{ rff_=(?i SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); :Z[|B(U //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); h
wi!C} SiteFileFetch fileFetch = new SiteFileFetch(bean); Gh5 3Pne fileFetch.start(); 1Y:JGon } ?vBMx _0 catch(Exception e){e.printStackTrace ();} r9Vt}]$a G [-0=ZKH? RRb>]oD } H73 r3BH |jI|},I gJH^f3 public static void main(String[] args) 79z/(T+ { t`-
[ new TestMethod(); 'WNq/z"X } tjLG$M1z` } m0i,Zw{eM 点击下载更多相关资料
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