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/* kms&o=^ **SiteFileFetch.java #:C;VAAp */ ASmMj;>UM package NetFox; *z[G+JX import java.io.*; XndGe=O import java.net.*; >2h|$6iWP 8 2qf7` HDQhXw!!hc public class SiteFileFetch extends Thread { T'\B17
:* j,%@%upM xw_VK1 SiteInfoBean siteInfoBean = null; //文件信息Bean
h4rIt3` long[] nStartPos; //开始位置 vvA=:J4/i) long[] nEndPos; //结束位置 (t&]u7Atr FileSplitterFetch[] fileSplitterFetch; //子线程对象 j.FA!4L long nFileLength; //文件长度 4w,=6|# boolean bFirst = true; //是否第一次取文件 _Gs*4: boolean bStop = false; //停止标志 @(>XSTh9 File tmpFile; //文件下载的临时信息 Gt#Jr!N~ DataOutputStream output; //输出到文件的输出流 #vrxhMo qu]ch&"?U //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) b`"E(S / public SiteFileFetch(SiteInfoBean bean) throws IOException Ci%u =%( { iEx.BQ+ siteInfoBean = bean; &:}e`u@5| //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); L9tjHC] tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); }OY]mAv-B if(tmpFile.exists ()) H.-jBFt} { ~RcI+jR) bFirst = false; 5/x"!Jk read_nPos(); *Q2;bmIc } Q'-V\G)11 else VBc[(8o { eduaG,+k7p nStartPos = new long[bean.getNSplitter()]; \#4??@+Xf nEndPos = new long[bean.getNSplitter()]; Eu/~4:XN } 6k6M&a / hUuQDJ 5G .Fi21
b Bz}Dgbb } fw>@:m_bK !iKR~&UpAL u] C/RDTH public void run() TymE(,1 { hUirvDvX //获得文件长度 q6A!xQs< //分割文件 9pPb]v,6 //实例FileSplitterFetch p- 5)J& //启动FileSplitterFetch线程 {\-rZb==F2 //等待子线程返回 !NWz try{ B;9"=0 if(bFirst) H /Idc,* { IV{,'+hT nFileLength = getFileSize(); y*2R#jTA if(nFileLength == -1) /dTy%hZC} { gfE<XrG System.err.println("File Length is not known!"); (;u tiupW } d,=Kv else if(nFileLength == -2) ""Ul6hRgv { EtN@ 6xP System.err.println("File is not access!"); bc}X.IC } vW4~\] else -r/G)Rs { <>aBmJs4 for(int i=0;i<nStartPos.length;i++) 5 e:Urv77 { )6|7L)Dk nStartPos = (long)(i*(nFileLength/nStartPos.length)); B{|g+c% } /CpUq;^ for(int i=0;i<nEndPos.length-1;i++) 3/IQ]8g" { $ tf;\R nEndPos = nStartPos[i+1]; W-wy<<~f } u2HkAPhD nEndPos[nEndPos.length-1] = nFileLength; 9 tZ)#@\ } 9xWC<i } KDwz!:ye htc& !m $ q*kD#;mh //启动子线程 -1Y9-nn[m fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; gyH'92ck for(int i=0;i<nStartPos.length;i++) /x.TF'Z* { Q,Tet&in ) fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), #!p=P<4M
siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), <%eY>E nStartPos,nEndPos,i); `B+%W Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); yu"Ii-9z fileSplitterFetch.start(); 2}j2Bhc } ={' "ATX(U // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), ~XGO^P"? siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); a2W}Wb+ // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", h"VQFqQy nEndPos = " + nFileLength); Tk s;,C // fileSplitterFetch[nPos.length-1].start(); {9TWPB/> "cjZ6^Hum d7N;Fa3yL //等待子线程结束 Du3OmXMk //int count = 0; BqZ^ I eC$ //是否结束while循环 `NA[zH,w3 boolean breakWhile = false; U
-~%-gFC GypZ!)1 8xhXS1 while(!bStop) 4mOw[}@A { PpMZ-f@ write_nPos(); '|^LNAx Utility.sleep(500); K#M
h breakWhile = true; g!n1]- 1 ,oe
e' -Hzn7L for(int i=0;i<nStartPos.length;i++) ^|}C!t+ { ZCPK{Ru QE if(!fileSplitterFetch.bDownOver) bHlG(1uf { qG"|,bA
breakWhile = false; j`Lf/S!} break; }@yvw*c } +C7
1".i- } 7=XQgbY/ if(breakWhile) /R#-mY break; }yqRz6=YB Bc}<B:q%b `7jm //count++; Fk D //if(count>4) X:-X3mV9{ // siteStop(); :NU-C!eT } 475yX-A
N>`+{ kF'^!Hp System.err.println("文件下载结束!"); #1Mk9sxo } EZ #UdK_ catch(Exception e){e.printStackTrace ();} *lv)9L+0 } @RotJl/> etf ft8 La%\-o //获得文件长度 7UHqiA`L public long getFileSize() ?97MW a { Z_' %'&Y int nFileLength = -1; q?z6|]M|u try{ *pP"u::S URL url = new URL(siteInfoBean.getSSiteURL()); 0kgK~\^,.O HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); cb&y8!ci~ httpConnection.setRequestProperty("User-Agent","NetFox"); t )Z2"_5 ]SrKe-*:U Bir}X int responseCode=httpConnection.getResponseCode(); oSNB\G< if(responseCode>=400) %9M; MK { D{o1G?A processErrorCode(responseCode); d_J?i]AP|' return -2; //-2 represent access is error iMx+y5O } Y=X"YH| mDE{s",q/ pALB[;9g String sHeader; )xQxc. M)Rp+uQ )$q<"t\#P# for(int i=1;;i++) j-gLX { ;TSnIC)c //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); 2BH>TmS //Utility.log(in.readLine()); a2/r$Tgm sHeader=httpConnection.getHeaderFieldKey(i); 9?D7"P+ if(sHeader!=null) s
cR-|GuZ { X1<)B]y if(sHeader.equals("Content-Length")) Y'fI4 { 'G(N,vu[@ nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); oE#HI2X break; P},S[GaZ } SUD]Wl7G`r } ?Z4&j'z< else };9dd3X break; %W"\ } :Tuy]]k } gZM{]GQ catch(IOException e){e.printStackTrace ();} (m;P,* catch(Exception e){e.printStackTrace ();} #!#V!^ o d\;M F ]p'Qk Utility.log(nFileLength); N["c*=x t{~"vD9Am 5YS`v#+ return nFileLength; 1\YX| } v{
C]\8 qjR;c&
q R 8e>;E //保存下载信息(文件指针位置) I.x0$ac7 private void write_nPos() ~$r^Ur!E\ { W<!q>8Xn? try{ 74gU4T output = new DataOutputStream(new FileOutputStream(tmpFile)); eE7Rd> output.writeInt(nStartPos.length); |D]jdd@!a2 for(int i=0;i<nStartPos.length;i++) _?G\^^ { DDAqgx // output.writeLong(nPos); pMt]wyKr output.writeLong(fileSplitterFetch.nStartPos); ([f6\Pw\ < output.writeLong(fileSplitterFetch.nEndPos); x?CjRvT$ } .6O>P2m]a_ output.close(); Va=0R } yWzvE:!) catch(IOException e){e.printStackTrace ();} 83R"!w18 catch(Exception e){e.printStackTrace ();} GsDSJz } QQ2xNNF[ o\|dm."f Dj!J 4uD //读取保存的下载信息(文件指针位置) DP;B*s4{U private void read_nPos() \!cqeg*53 { 8.-PQ try{ aF'Ik XG d DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); g?=B{V int nCount = input.readInt(); }d.R=A9L nStartPos = new long[nCount]; W@wT,yJ8@ nEndPos = new long[nCount]; Gw+z8^|C&} for(int i=0;i<nStartPos.length;i++) sK?[1BI { ,}{E+e5jh7 nStartPos = input.readLong(); =Rb, `% nEndPos = input.readLong(); $Fr2oSTT) } M8juab%y input.close(); !Z=`Wk5 } g<,v2A catch(IOException e){e.printStackTrace ();} B|extWwu catch(Exception e){e.printStackTrace ();} Tr@`ozp8 } ?5B}ZMW J|xqfY@+ a*SJHBB private void processErrorCode(int nErrorCode) { +C>^b { QJ"Bd`wc System.err.println("Error Code : " + nErrorCode); &7@6Y{!/
} 2YwV}
5j]}/Aq dDpe$N //停止文件下载 N#,4BU public void siteStop() ORtl~V' { |qI_9#M\( bStop = true; uL-i>!"L!} for(int i=0;i<nStartPos.length;i++) =,T~F3pK fileSplitterFetch.splitterStop(); + !_^MB kk ;U20g:K Q 5@~0 } W{-N,?z } f2{4Y) //负责部分文件的抓取 ny=CtU!z **FileSplitterFetch.java (Mtc&+n{ */ G uDus2#+ package NetFox; +,|-4U@dl Rb9Z{Clq> d9Q%GG0] import java.io.*; 3[V|C=u0 import java.net.*; 5lU`o !/jx4w~R \!S C; public class FileSplitterFetch extends Thread { ahV_4;yF (b{
{B$O {.!:T+'Xi\ String sURL; //File URL mDM]RAub) long nStartPos; //File Snippet Start Position >Mvt;'c long nEndPos; //File Snippet End Position ^2mXXAQf7^ int nThreadID; //Thread's ID gcv,]v8 boolean bDownOver = false; //Downing is over
N}dJ)<(2~ boolean bStop = false; //Stop identical P%/+?(? FileAccessI fileAccessI = null; //File Access interface "V9!srIC zZf#E@=$| !o.g2 public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException MnX2sX| { z4f5@ this.sURL = sURL; U3za}3 this.nStartPos = nStart; t: [[5];E this.nEndPos = nEnd; XD|&{/O nThreadID = id; Q]|+Y0y}X fileAccessI = new FileAccessI(sName,nStartPos);//定位 .qVdo+M%F } 2<988F *50Ykf Ft>ixn public void run() R#T6Ii { P{}Oe
*9" while(nStartPos < nEndPos && !bStop) 9s7B1Pf { Pu9.Uwx T.(SBP xE)pj| try{ G4RsH/ URL url = new URL(sURL); Ko%rB+d HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); 94a_ W9 httpConnection.setRequestProperty("User-Agent","NetFox"); \\/X+4|o' String sProperty = "bytes="+nStartPos+"-"; AVcZ.+? httpConnection.setRequestProperty("RANGE",sProperty); SU#|&_wtr! Utility.log(sProperty); { j/w3 KK] >0QAY d9^=#ot InputStream input = httpConnection.getInputStream(); pixI&iQ //logResponseHead(httpConnection); +'KM~c?] SjJUhTb I+<`} byte[] b = new byte[1024]; FcWu#}.p} int nRead; B[$SA-ZHi while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) &1?Q]ZRp { qh&K{r*T nStartPos += fileAccessI.write(b,0,nRead); 6Edqg //if(nThreadID == 1) )b-G2< kb // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); zh4o<f:- } snK9']WXo H~$|y9>qI |j!D _j#U Utility.log("Thread " + nThreadID + " is over!"); 4B> l|% bDownOver = true; Qy$QOtrv //nPos = fileAccessI.write (b,0,nRead); PAc~p8S } p5[uVRZ catch(Exception e){e.printStackTrace ();} -!}1{ } 1u`Z?S( } %idnm @=,J6 $"UAJ - //打印回应的头信息 H{}6`;W public void logResponseHead(HttpURLConnection con) ]':C~-RV{ { (%r:PcGMEV for(int i=1;;i++) AVJF[t , { # / 4Wcz< String header=con.getHeaderFieldKey(i); -Kc-eU-&q if(header!=null) |/(5GX,X //responseHeaders.put(header,httpConnection.getHeaderField(header)); r;'!qwr Utility.log(header+" : "+con.getHeaderField(header)); s=d?}.E$ else j=gbUXv/ break; EP8LJzd" } mb/3
#) } O^<6`ku P9'5=e@jB <T}#>xHs3 public void splitterStop() O:U@m@7 { vx4&
;2 bStop = true; m&%N4Q~X> } m:^@AR1%d
Kr#=u~~M T8\,2UWsj2 } %sq=lW5R{b K)v(Z" '0=U+Egp /* 4 '+)9&g **FileAccess.java ~W#f,mf *//文件访问(定位,写) $K iMu package NetFox; 7]^Cg;EtM: import java.io.*; *\`C!r jsG9{/Ov3 BNByaC public class FileAccessI implements Serializable{ F+6ZD5/ p!691LI //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 Ky'^AN] RandomAccessFile oSavedFile; u)V*o long nPos; PQ[TTLG\& K4rr.f6 t.zSJ|T_&O public FileAccessI() throws IOException z6!X+`& { _I!Xr!!)a0 this("",0); &p%,+| } z=xHk|+' h}oQr0"c d}G?iX;c} public FileAccessI(String sName,long nPos) throws IOException z~BB|-kp1 { w Vof_'F1 oSavedFile = new RandomAccessFile(sName,"rw"); [X
I5Bu ~ this.nPos = nPos; Cse0!7_T oSavedFile.seek(nPos); _ E%[D( } mSzwx/3" p"JSYF
9] EW!$D public synchronized int write(byte[] b,int nStart,int nLen) AVJk { tL5Xfd?u int n = -1; GGBe/X try{ a~%ej.)l oSavedFile.write(b,nStart,nLen); _c&*'IY[V n = nLen; VgdkCdWRm_ } Q(sbClp" catch(IOException e) S ~_% { 5A)w.i&V e.printStackTrace (); GBQb({ } `%=Jsi0.Nq 8iCIs=06 sH]AB=_ return n; *HC8kD a%$ } Y1~SGg7(@ =j{jylC `~}7k)F( } X=hgLK^3<, lVFX@I =pI *"5a5.`%, /* `%Ghtm * **SiteInfoBean.java y"hM6JI */ MT5A%|H e package NetFox; d{he EH:1Z*|Z{\ q^cF D public class SiteInfoBean { <Z;7=k &SM$oy#? ^M9oTNk2 private String sSiteURL; //Site's URL P=@lkF!\# private String sFilePath; //Saved File's Path GKS y|z private String sFileName; //Saved File's Name Q. XsY.{ private int nSplitter; //Count of Splited Downloading File ,dp?'_q{ pxbNeqK@p vP4Ij public SiteInfoBean() s,k1KTXg<B {//nSplitter的缺省值为5 IX(yajc[~M //default value of nSplitter is 5 =,
0a3D6b this("","","",5); 9e&#;6l } GW#kaqC1 :2My|3H\ z]YhQIU4n8 public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) 85fDuJ9$Z" { AN>`M?EQ sSiteURL= sURL; B#MW`7c sFilePath = sPath; =tNiIU sFileName = sName; Tc(R-Wi this.nSplitter = nSpiltter; {XX Nl)% ;40m goN <f6PULm } J){\h-4 -IS9uaT5 }ELCnN public String getSSiteURL() de6dLT>m { nnNg^<[k3 return sSiteURL; t4*A+"~j } %MJ7u} 0q>lW &J ;5k|gW public void setSSiteURL(String value) C6M/$_l&a { `.W;ptZ6 sSiteURL = value; DxgT]F% } gk1S"H orHD3T%& WS/+Yl public String getSFilePath() %`1vIr(7 { ewG21 q$ return sFilePath; c.Y8CD.tqL } ;8T=uCi ~BZV:Es ;QQ7vo public void setSFilePath(String value) 5#)<rK { HdUW(FZ sFilePath = value; KL mB } BznA)EK?@ grdyiBSVn _ICDtG^ public String getSFileName() b=UMoWS { 4.B*B3 return sFileName; vx@p;1RU` } l&Ghs@>Kl dO;vcgvb xg^^ @o public void setSFileName(String value) ('-}"3 { X9A[
sFileName = value; |a$w;s>\ } Z{4aGp* pf@}4PN} *.c9$`s public int getNSplitter() (I
ds<n" { K=?F3tX^ return nSplitter; ]C6[`WF } idS
RWa zZc@;S# W7=_u+0d public void setNSplitter(int nCount) \y`3Lh Y { -xu.=n@, nSplitter = nCount; R(83E
B~_ } <1+6O[>{ } ~:<@ ` !b->u_ 7 eQoc2X2 /* j4xr1y3^ **Utility.java 'xZPIj+ */ K}<!{/fi) package NetFox; %)Uvf`Xhh4 h_chZB' E
D^rWE_ public class Utility { x<j"DS}S)D ?U/Wio$@ `6N-MsP public Utility() Y+u-J4bj { u%1k 8C,utjy ObyuhAR } ho]!G498 @Du}
//线程睡眠 Y`7#[g public static void sleep(int nSecond) #!Cter2 { #G+ try{ -Bo~"q Thread.sleep(nSecond); TflS@Z7C } 9g
&Ch9-/ catch(Exception e) BZ;}ROmqk { Ym.l@( e.printStackTrace (); B+e_Y\Bu } tkN3BQ } T$^>Fiz{Se $#7J\=GZ+ //日志 4%fN\f public static void log(String sMsg) q= yZx) { 3']:1B System.err.println(sMsg); +8)]m< } TjUZv 1(L fAMD2C ,B~lwF9 public static void log(int sMsg) rbK#a)7 { 45)ogg2 System.err.println(sMsg);
Ku/H= } : \:~y9X0 } Wz-3?EQ s"=F^# !0OD(XT /* [CDX CV-z **TestMethod.java hX8gV~E=y */ 1t[;` iZ package NetFox; `
-[Bo C^,4`OI &V#z kW public class TestMethod { {yHB2=nI gR;8ht(pd( uspkn1- public TestMethod() ;c X^8;F0 { ///xx/weblogic60b2_win.exe [-E{}FL| try{ <E[HlL SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); -eR!qy:.]5 //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); DrCWvpudd SiteFileFetch fileFetch = new SiteFileFetch(bean); :otY;n - fileFetch.start(); [W9e>Nsp0 } H-_^TB catch(Exception e){e.printStackTrace ();} D/S>w(= M9Nk=s! 3 qIDWl{b< } hY.e [+ jSie&V@ px /o|PA:6J public static void main(String[] args) xTJSr2f { #a(%(k S new TestMethod(); pkXfsi-Nu } #h gmUa } =!?[]>Dh 点击下载更多相关资料
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