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/* :lp
V **SiteFileFetch.java l]Q<BV */ ?9:~d#p package NetFox; 2D'$ import java.io.*; bt0Q6v5 import java.net.*; ,];QzENw :Wd@Qy?; 5HW'nhE public class SiteFileFetch extends Thread { <g{d>j ;hJz'&UWQ P] qL&_ SiteInfoBean siteInfoBean = null; //文件信息Bean nlR7V. long[] nStartPos; //开始位置 NrWgaPO)i long[] nEndPos; //结束位置 #;F*rJ[XY FileSplitterFetch[] fileSplitterFetch; //子线程对象 )o_Pnq9_ long nFileLength; //文件长度 !ZzDSQ; boolean bFirst = true; //是否第一次取文件 K7}]pk,AG boolean bStop = false; //停止标志 uN9J?j*ir File tmpFile; //文件下载的临时信息 TX$4x~: DataOutputStream output; //输出到文件的输出流 3s$vaV~(a 9<-7AN}Z //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) nn{PhyK public SiteFileFetch(SiteInfoBean bean) throws IOException _?c7{ { 4-~S"T8<u siteInfoBean = bean; roHJ$~q? //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); oS#PBql4 tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); {6gY6X-R if(tmpFile.exists ()) Ql{:H5 { "aJfW bFirst = false; Q;0g read_nPos(); 3\0,>L9ET@ } }BJR/r else D>
E N:_v { P8n |MN nStartPos = new long[bean.getNSplitter()]; ,]_<8@R nEndPos = new long[bean.getNSplitter()]; p\ _& } T!Z).PA# ,HtXD~N 3D2i32Y@! }C<$q } 9UE)4*5 _j}jh[M
7'idjcR public void run() %>!$eCX { ) S,f I //获得文件长度 I7Xm~w!{qk //分割文件 =RjseTS //实例FileSplitterFetch K%WG[p\Eu //启动FileSplitterFetch线程 7 L$\S[E //等待子线程返回 \,-e> try{ pMLTXqL if(bFirst) .1A/hAdU { =a!_H=+4 nFileLength = getFileSize(); \<W/Z.}/ if(nFileLength == -1) cE+Y#jB { vMeB2r< System.err.println("File Length is not known!"); ZFNg+H/k } u{%dm5 else if(nFileLength == -2) ;U]Ym48 { D /bF System.err.println("File is not access!"); ,qT+Vqpr{ } f yhBfA:u else K2!GpGZu { qw6i|JM% for(int i=0;i<nStartPos.length;i++) 't3&,:Y { [K""6D nStartPos = (long)(i*(nFileLength/nStartPos.length)); );=0cnr3 } s|!lw for(int i=0;i<nEndPos.length-1;i++) lAJP X { jAak,[~; nEndPos = nStartPos[i+1]; e)*-<AGwC } Y4{/P1F nEndPos[nEndPos.length-1] = nFileLength; }}u16x}*n } k\KI#.> } >.&E-1[+: XNQPyZ2@|b AfvIzsT0 //启动子线程 \%|%C fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; G|.6%- for(int i=0;i<nStartPos.length;i++) #&K? N
{ DLD 5> fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), PpezWo)9 siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), vC!B}~RG nStartPos,nEndPos,i); ^5rB/y, Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); _t?# fileSplitterFetch.start(); ~'w]%rh! } fxknfgbg // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), Q)2i{\GPVn siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); =buarxk // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", '9@AhiNV nEndPos = " + nFileLength); QzVo U | // fileSplitterFetch[nPos.length-1].start(); YT'olk U<I]_] U88gJ[$ //等待子线程结束 6 l7iX] //int count = 0; ToM1#]4 //是否结束while循环 g9@H4y6fe= boolean breakWhile = false; BKKW3PT dF$&fo% /p$+oA+ while(!bStop) `wKd##v'@ { Af Y]i write_nPos(); `APeS=<
& Utility.sleep(500); cy0j>-z breakWhile = true; Hq#q4Y zx7A}rs3oX `PZcL2~E for(int i=0;i<nStartPos.length;i++) 6k`O { \hI|I!sDWy if(!fileSplitterFetch.bDownOver) 6G7+&g` { ng:B;;
m breakWhile = false; PFjh]/= break; =HjC.h } Tly*i"[& } SvQ!n4 $ if(breakWhile) 17#t 7Yk break; Jk;dtLL}4 &Gs/#2XQ $},_O8R //count++; N"s"^}M\ //if(count>4) mC}
b>\ // siteStop(); wizLA0W } r6vI6|1 $bl<mG%#9 p %hvDC System.err.println("文件下载结束!"); ?-JW2 E"uT } m=rMx]k catch(Exception e){e.printStackTrace ();} q\xsXM } v^aI+p6 zMh`Uqid CbFO9q //获得文件长度 : +f6:3 public long getFileSize() yVWt%o/ { cCs@[D#O1 int nFileLength = -1; d)GR]^=r try{ o_a' <7\#i URL url = new URL(siteInfoBean.getSSiteURL()); eW;c
3< HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); r4Xaa< httpConnection.setRequestProperty("User-Agent","NetFox"); o)+C4f[G4 AnoA5H P q1 j int responseCode=httpConnection.getResponseCode(); Kx02 2rgDU if(responseCode>=400) cN`P5xP' { L@.Trso processErrorCode(responseCode); baGV]=j return -2; //-2 represent access is error w|f@sB>j } ^%O$7* <Ok7-:OxA }U?:al/m String sHeader; =^z*p9ZB *onVG5< mbHMy[R for(int i=1;;i++) 9Zr6 KA{ { +xQj-r)- //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); R)-~5"}~ //Utility.log(in.readLine()); @(IA:6GN sHeader=httpConnection.getHeaderFieldKey(i); 4lI&y<F if(sHeader!=null) n.Y45(@E { `>=@Kc if(sHeader.equals("Content-Length")) -$I$z o { EAHdt=8W{ nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); 9Y?``QBN break; 5%+epzy } E {UhM q7 } .
LeS- else F^&@[k7WW break; DABV}@ K" } uK0L> } 9{0%M catch(IOException e){e.printStackTrace ();} c3WF!~1r catch(Exception e){e.printStackTrace ();} zXk^ugFy / 2MhP=, $."Fz
x Utility.log(nFileLength); #<G:& ` 5n^DP*X SeuDJxqopD return nFileLength; %Vfr#j$= } 58R.`5B 2OjU3z<J "]W,,A- //保存下载信息(文件指针位置) Pm QeO*f+ private void write_nPos() >^SQrB { BZIU@^Q_Y[ try{ GC|V>| tz# output = new DataOutputStream(new FileOutputStream(tmpFile)); iFZ.a.NDc output.writeInt(nStartPos.length); OS1f}< for(int i=0;i<nStartPos.length;i++) _-2;!L#/ { !wC(
]Y // output.writeLong(nPos); /T2 v`Li output.writeLong(fileSplitterFetch.nStartPos); 5Rp mR output.writeLong(fileSplitterFetch.nEndPos); 8:2Vib$ } uX6p^KNm5 output.close(); ?v`24p3PC } JW"`i catch(IOException e){e.printStackTrace ();} C3~O6<,Jh catch(Exception e){e.printStackTrace ();} &UO/p/a } b5?k gY V9cj h-x~:$Z, //读取保存的下载信息(文件指针位置) x4,[5N"}YK private void read_nPos() 9P*f { Pa"Kk9!o36 try{ Yp\Y]pym DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); =CO'LyG int nCount = input.readInt(); j%}9tM6[ nStartPos = new long[nCount]; c4zGQoeH: nEndPos = new long[nCount]; olKM0K for(int i=0;i<nStartPos.length;i++) *;Cpz[N { 3J8M0W nStartPos = input.readLong(); /. H(& nEndPos = input.readLong(); Ucz=\dO1 } }PM7CZSq input.close(); 40z1Qkmaey } yCkX+{ki catch(IOException e){e.printStackTrace ();} Bn.5ivF3 catch(Exception e){e.printStackTrace ();} \jZ)r>US" } 24wr=5p]Q QZ[S,
c^ KOoV'YSC[( private void processErrorCode(int nErrorCode) 7Sh1QDYZ { tKds|0,j| System.err.println("Error Code : " + nErrorCode); '&$zgK9T? } X&Sah}0V& 8"p rWAN |:,`dQfw //停止文件下载 1H-~+lf public void siteStop() N#@v`S { Sggl*V/q bStop = true; ?$y/b}8 for(int i=0;i<nStartPos.length;i++) mHa~c(x fileSplitterFetch.splitterStop(); -$49l "<f?.l\+ [+="I
& } ~Q5]?ZNX } b5ul|p //负责部分文件的抓取 J*m7
d4^ **FileSplitterFetch.java &wN}<Ge6 */ Fc=6*.hy package NetFox; 4n1 g@A=y t;u)_C,bmP b
`bg`}x import java.io.*; @ZrNV*&< import java.net.*; Hs{x Z: tu/4 FlY"OU* public class FileSplitterFetch extends Thread { j`K0D65 ,?`kYPZ B?Rkz String sURL; //File URL :_`Yrx5 long nStartPos; //File Snippet Start Position (:h&c6'S)b long nEndPos; //File Snippet End Position =W>a ~e]/ int nThreadID; //Thread's ID T0.sL9 boolean bDownOver = false; //Downing is over e E(+ boolean bStop = false; //Stop identical "z=~7g FileAccessI fileAccessI = null; //File Access interface t:xTmK&vt 8 qZbsZi4 =k;X}/ public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException OMd:#cWsQ { ^(@]5$^Z this.sURL = sURL; MBnxF^c&P this.nStartPos = nStart; c#>:U,j this.nEndPos = nEnd; C5jt(!pi nThreadID = id; 4W<[& )7 fileAccessI = new FileAccessI(sName,nStartPos);//定位 A
PrrUo } M
9NT%7Il .F[5{XV K$B~vy6E` public void run() 66$hdT$ { B\%
Gp} while(nStartPos < nEndPos && !bStop) G*~CB\K_ { Xq "Es Dz/MIx 8Qj1%Ri:U try{ 9[DlJ@T} URL url = new URL(sURL); J3B+WD] HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); Z&=Oe^ httpConnection.setRequestProperty("User-Agent","NetFox"); ?_v_*+b_ String sProperty = "bytes="+nStartPos+"-"; gvL*]U7 httpConnection.setRequestProperty("RANGE",sProperty); S,f#g?V Utility.log(sProperty); woF{O)~X )J2UNIgN ~=<uYv?0s InputStream input = httpConnection.getInputStream(); Cv4nl7A' //logResponseHead(httpConnection); $iA:3DM07 /CbiYm _lRIS_^;eE byte[] b = new byte[1024]; hzpl;Mj int nRead; (]10Z8"fJ while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) '(ZT}N { OYb:);o,iE nStartPos += fileAccessI.write(b,0,nRead); Y"nz l]T //if(nThreadID == 1) I]3!M`IMG // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); CkNh3'<wg } @W~aoq6 3II*NANeg I :bT"N Utility.log("Thread " + nThreadID + " is over!"); ^upd:q bDownOver = true; fN:FD` //nPos = fileAccessI.write (b,0,nRead); S@y?E} } {A5$8)nl| catch(Exception e){e.printStackTrace ();} ;lt8~ea } uD[T l } 77wod}h!: ,DEcCHr, ^g"p}zf
L" //打印回应的头信息 Vi0D>4{+ public void logResponseHead(HttpURLConnection con) QjYw^[o { v yt|x5 for(int i=1;;i++) <'BsQHI { .CNwuN\ String header=con.getHeaderFieldKey(i); FPPl^ if(header!=null) rEbH<| //responseHeaders.put(header,httpConnection.getHeaderField(header)); .'h^ Utility.log(header+" : "+con.getHeaderField(header)); oiD{Z else ml!c0< break; G|||.B8 } (uC@cVkP } 6z:/ma^
SwaPRAF !XM*y public void splitterStop() ^+k= ;nl { `tXd?E/e bStop = true; %|>D{q6C } ]Zc\si3i& "5?1S-Vl /}iBrMD{[ } fr$6&HDZ9 ;vbMC74J# 6Ypc]ym=J /* ] ;CJ6gM~ **FileAccess.java 8!@}\6qM *//文件访问(定位,写) <:mK&quf package NetFox; <(yAat$H import java.io.*; Q("4R Q}a(vlZ t~44ub6GN` public class FileAccessI implements Serializable{ /-WmOn* 4gUx#_AaG //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 "/2kf)l{4 RandomAccessFile oSavedFile; 2iO{*cB long nPos; kg,\l9AM @O-\s q &] xtx>qg< public FileAccessI() throws IOException )r)ZmS5O { 8#o2 qQ2+ this("",0); \w(0k^<7 } Cb.M */K]sQZa og&h$<uOZt public FileAccessI(String sName,long nPos) throws IOException LnsYtkbr { N.ZuSkRM oSavedFile = new RandomAccessFile(sName,"rw"); 2"%f:?xV{ this.nPos = nPos; ` K0PLxSv oSavedFile.seek(nPos); ]&`=p{Z } ]mgpd}Y ASr@5uFR .b^!f<j public synchronized int write(byte[] b,int nStart,int nLen) >.G#\w { 7u5H o` int n = -1; 3f~znO try{ 2iOYC0`! oSavedFile.write(b,nStart,nLen); '#.D`9YI< n = nLen; WN#2<XjG } ya,-Lt catch(IOException e) T=@Ygjk { /WLZyT2 e.printStackTrace (); \=&Z_6Mu } Gi2Fjq/Y *Tr{a_{~C 8F's9c, return n; G-;EB } ?du*ITim '
~fP#y v\?l+-A?y } ;cp||uO CVEo<Tz 82?LZ?!PD /* @L0)k^: **SiteInfoBean.java >g@@ yR, */ 8s-X H package NetFox; `0!%jz= 4T
v=sP rq}xuSFI public class SiteInfoBean { oEj$xm_} aVr =7PeF #CB Kt, private String sSiteURL; //Site's URL jc#gn&4C private String sFilePath; //Saved File's Path 9RkNRB)8 private String sFileName; //Saved File's Name t)~$p#NS private int nSplitter; //Count of Splited Downloading File V{x[^+w7X~ tYSfeU GZY:EHuz[ public SiteInfoBean() .f>7a;V?} {//nSplitter的缺省值为5 {eQijW2Z3 //default value of nSplitter is 5 lQm7`+ this("","","",5); 8LXK3D}?3 } )V*`(dn'zm ?U1Nm~'UZ T1x67 b
u public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) CJs
~!ww { {G<1. sSiteURL= sURL; [qkc6sqo sFilePath = sPath; (XFF}~>B. sFileName = sName; }nO%q6|\V this.nSplitter = nSpiltter; 2+g'ul` }jdmeD: Cn5;h(r } r)Ml-r= _u6MSRX[6$ 5N bq9YY public String getSSiteURL() =ReSlt { u|D L?c>W return sSiteURL; E]r<t# } ,^eOwWV U%;E: | A* Pz-z>z public void setSSiteURL(String value) 0W+RVp=TL1 { [8oX[oP sSiteURL = value; wL6G&6]</W } ;ZP!:, Z/4bxO=m "s(|pQh; public String getSFilePath() ~lqNWL^l { j7NOYm5N return sFilePath; N3oa!PE } av:%wJUl,$ ld 1[Usaq <JvYCWX` public void setSFilePath(String value) cjd-B:l { X;#Ni}af sFilePath = value; 7-\wr^ll3 } y>d`cRy G{Uqp'=G Xf
mN/j2 public String getSFileName() :lmimAMt { ?@MWV return sFileName; Y@T$O<* } '0&HkM{ D HsT6 #K %kgT=<E' public void setSFileName(String value) ;M\Cw.%![ { 5Kk}sxol sFileName = value; L%- ENk } +"~*L,ken0 M8y|Lm}o 1(%6X*z public int getNSplitter() Ub4)x { vu*9(t)EC return nSplitter; [ lK`~MlQ } K2V?[O# t? =V<Yd1 lEb H4 g public void setNSplitter(int nCount) $~?)E;S
{ ^v:XON< nSplitter = nCount; Ay%]l| Gm } l Ttc# } C+mPl +}w D}-HWJQA3 P*hYh5a /* !FB2\hiM **Utility.java 1 CV? */ 9[`\ZGWD package NetFox; f2v~: u {>TAnb?n x`'s public class Utility { A.r.tf}: m2ph8KC O(_f&a public Utility() fWF!% |L { F*NHy.Y (/t{z= vy>(?[ } h96<9L r]wy-GT //线程睡眠 y
S<&d#:" public static void sleep(int nSecond) q 1u_r { >N}+O<Fc try{ Kf)$/W4 Thread.sleep(nSecond); 3Gw*K-. } C/ ]Bx catch(Exception e) ;$qc@)Uwp { ?}u][akM e.printStackTrace (); [d>2F } H$
:BJ$x@ } !thFayq Z0wH%o\ //日志 T/J1 b- public static void log(String sMsg) oDGBC { Lu[Hz8 System.err.println(sMsg); v^[!NygShs } l
SuNZYaO DLe>EU;vS th0>u.hJ public static void log(int sMsg) >km$zfM2- { pNu?DF{
3 System.err.println(sMsg); ,I,Zl.5 } aFh'KPhe } G,(Xz"`, i"E_nN"V "ZmxHMf /* UCo<ie\V **TestMethod.java C?6q]k]r */ -:b<~S[ package NetFox; 2t=&h|6EW 2{g&9 {WeRFiQ?- public class TestMethod { :
>$v@d X3ZKN; ?b(DDQMf public TestMethod() " ;\EU4R { ///xx/weblogic60b2_win.exe +hH7|:JQ try{ &@PAv5iNf SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); iA'p!l|P //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); 'p%w_VbI SiteFileFetch fileFetch = new SiteFileFetch(bean); =H}}dC<) fileFetch.start(); YC*`n3D|' } !Uhc jfq`e catch(Exception e){e.printStackTrace ();} X-j<fX_ y35e3 1d&Q
E\2} } qs9r$o.\l ~BBh 4t& %fh-x(4v public static void main(String[] args) Cth<x n(Q { NpGz y`&b new TestMethod(); |m$]I4Jr } PK_2 } s:tWEgZk? 点击下载更多相关资料
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