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/* [i,5>YIk **SiteFileFetch.java m
_t(rn~f6 */ o'x_g^ Y package NetFox; K9x*Sep
import java.io.*; w3>Y7vxiz` import java.net.*; >m)2ox_B rwi2kk#@P {GGO')p public class SiteFileFetch extends Thread { zJB+C=]D7H y1@"H/nYJ j8D$/ SiteInfoBean siteInfoBean = null; //文件信息Bean : L6-{9$ long[] nStartPos; //开始位置 44/0}v] long[] nEndPos; //结束位置 C%x(`S^/ FileSplitterFetch[] fileSplitterFetch; //子线程对象 kVB}r.NHP long nFileLength; //文件长度 MkluK=$ boolean bFirst = true; //是否第一次取文件 (HTk;vbZm boolean bStop = false; //停止标志 MJ*oeI!.= File tmpFile; //文件下载的临时信息 S`'uUvAA DataOutputStream output; //输出到文件的输出流 BIb{<tG^N !0d9<SVC //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) AW{/k'%xw public SiteFileFetch(SiteInfoBean bean) throws IOException K>DnD0 { d ~Z:$&r siteInfoBean = bean;
K|Ij71 //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); #!<+:y'S? tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); 4`^TC[ if(tmpFile.exists ()) FZ}C;yUPD { r* bFirst = false; BT*K,p read_nPos(); *}Ae9 } h} b^o* else -*]9Ma<wa { ^/5E773 nStartPos = new long[bean.getNSplitter()]; tM?I()Y&P nEndPos = new long[bean.getNSplitter()]; lw/
m0}it } T_;G))q' 5qODS_Eq 802]M |[n|=ORI' } {&JurZ V.OoZGE>] y&O_Jyg< public void run() enfu%"(K) { -%QEzu& //获得文件长度 })=c:h& //分割文件 "~,(Xa3x //实例FileSplitterFetch B )3SiU //启动FileSplitterFetch线程 daokiU+l2 //等待子线程返回 x:D<Mu# try{ iz|9a|k6x if(bFirst) >Gu>T\jpe. { 0%L$TJ.'' nFileLength = getFileSize(); _ER
cmP if(nFileLength == -1) w]}cB+C+l# { (^OC%pc System.err.println("File Length is not known!"); B2+_F"<; } y`P7LC else if(nFileLength == -2) OKNs (H { ,?skJ System.err.println("File is not access!"); (G b{ckzs } Ns7l-mb else uC$4TnoQx. { W SeRV?+T for(int i=0;i<nStartPos.length;i++) [}g5Z=l { *{n,4d\.. nStartPos = (long)(i*(nFileLength/nStartPos.length)); -wHGi } K
{N;k- for(int i=0;i<nEndPos.length-1;i++) <8}9s9Nk { ieg PEb nEndPos = nStartPos[i+1]; U";Rp&\3; } %4g4 C# nEndPos[nEndPos.length-1] = nFileLength; }t{^*( } peP:5WB } ZCq\Zk1O& J'&?=| <@2?2l+`X //启动子线程 J +Y|# U fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; P6Ol+SI#m for(int i=0;i<nStartPos.length;i++) (IWd?,H,n { Gl\RAmdc fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), =$`")3y3 siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), S %%qn nStartPos,nEndPos,i); +hYmL
Sq Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); !Kn+*' # fileSplitterFetch.start(); Ts *'f } O4+w2'., // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), R(#;yn siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); /]UNN~( // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", 5 BG&r*U nEndPos = " + nFileLength); 206jeH9 // fileSplitterFetch[nPos.length-1].start(); #k]0[;1os yD'h5)yu W5yu`Br //等待子线程结束 Y2~{q Y //int count = 0; {;gWn'aq //是否结束while循环 )bJ6{& boolean breakWhile = false; (9QRg; 57%cN-v* F}mwQ%M while(!bStop) 2{qG { k3eN;3#& write_nPos(); ;^SgV Utility.sleep(500); DO*C] breakWhile = true; 9Ei#t FMc X'p%$HsMG iC\=U for(int i=0;i<nStartPos.length;i++) e=$xn3)McY { 7q=xW6 if(!fileSplitterFetch.bDownOver) yL,B\YCf8 { R9HS%O6b6 breakWhile = false; _Xe< JJvq break; UYLI>XSd } )W3l{T( } cSWVHr if(breakWhile) /v<8x?= break; :O=Vr]Y8K "lAS
<dq }z:=b8} //count++; p
=O1aM //if(count>4) msJn;(Pn // siteStop(); b8Sl3F?-~ } dRC+|^rSC eHIC'b. ?`iBp+iBv System.err.println("文件下载结束!"); lsf?R'1 } S}yb~uc, catch(Exception e){e.printStackTrace ();} 6n g9 o6 } zh#uwT1u fR{7780WZ `_kRvpi //获得文件长度 ]>j_
Y, public long getFileSize() ~<-h# B { /pEkig7M int nFileLength = -1; $x0F(|wxt try{ 1Tkz! URL url = new URL(siteInfoBean.getSSiteURL()); =25"qJr HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); j'cS_R httpConnection.setRequestProperty("User-Agent","NetFox");
w?"l4.E% /GNYv* Dbd5d]]n3 int responseCode=httpConnection.getResponseCode(); 7 |A,GH if(responseCode>=400) > ^}z { l"Q8` processErrorCode(responseCode); [sRQd;+ return -2; //-2 represent access is error ':@qE\( } z9ZAY!Zhq] nz+KA\iW R8)"M(u=l String sHeader; =X B)sC% 8X5XwFf} 7v_e"[s~ for(int i=1;;i++) ?*0kQo' { !h~\YE) //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); a6OT2B //Utility.log(in.readLine()); wH.'EC sHeader=httpConnection.getHeaderFieldKey(i); 0v?,:]A0E if(sHeader!=null) .N 2Yxty8> { J\BdC]; if(sHeader.equals("Content-Length")) 7Fx8&Z { '}=M~ nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); 2I break; @2<J_Ja } $Z4p$o
dk } ]Yy
Sf else [iD!!{6+ break; xN]bRr } *gnL0\* } SzDi=lY catch(IOException e){e.printStackTrace ();} ()Z$j,2 catch(Exception e){e.printStackTrace ();} $A,=z l`k3!EZDS //(c 1/s Utility.log(nFileLength); .6*A~%-=[d BeRn9[ ~H.;pJ{ 8 return nFileLength; ,3K?=e2 } R?(j#bk GUxhCoxb 6ZE]7~X //保存下载信息(文件指针位置) Nb6HM~ private void write_nPos() W*0KAC`m { {!w]t?h try{ l6~eb=u;9g output = new DataOutputStream(new FileOutputStream(tmpFile)); p5*Y&aKj output.writeInt(nStartPos.length); Ok@5`?08 for(int i=0;i<nStartPos.length;i++) :MpCj<<[ { @AwH?7(b // output.writeLong(nPos); _Cs.%R!r output.writeLong(fileSplitterFetch.nStartPos); q/Q*1 output.writeLong(fileSplitterFetch.nEndPos); :2?du } V\_
&2',t output.close(); ^l9S5
{ } C-Mop,w catch(IOException e){e.printStackTrace ();} fu`oDi catch(Exception e){e.printStackTrace ();} l}m@9 ~oC } tNjrd}8s |qBo*OcO f-Sb:O!V //读取保存的下载信息(文件指针位置) ^^v!..V]J private void read_nPos() Ne=D$o { uwbj`lpf try{ vm(% u!_P DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); j8lbn |. int nCount = input.readInt(); NTV0DkX nStartPos = new long[nCount]; fE(rDQI nEndPos = new long[nCount]; H*Yyo? for(int i=0;i<nStartPos.length;i++) /h_BF\VBs { H)5]K9D nStartPos = input.readLong(); &ha39&I nEndPos = input.readLong(); BM3nZ<%3 } 9N9;EY-U input.close(); =KX:&GU } hgm`6TQ catch(IOException e){e.printStackTrace ();} C&Rv)j catch(Exception e){e.printStackTrace ();} qp7>_B } NJ|8##Z> GSk;~^l -G{}8GM private void processErrorCode(int nErrorCode) #{0c01JZ { RJ0w3T]7 System.err.println("Error Code : " + nErrorCode); SW bwD/SN } ]86U-`p oM< 9]jK} . uhP( //停止文件下载 ]]Wa.P~]O public void siteStop() rt f}4. { s{gdTG6v` bStop = true; g4Tc (k# for(int i=0;i<nStartPos.length;i++) 5{{u #W%= fileSplitterFetch.splitterStop(); KX{ S8_ >I+O@ IXg0g<JZ } 9Czc$fSSt } 'y@0P5[se //负责部分文件的抓取 S/8xo@vct] **FileSplitterFetch.java ~/QzL.S;p */ pm^[ve package NetFox; SFTThM]8M1 [gU z9iU 9"&HxyOfX import java.io.*; L~~;i'J import java.net.*; o: qB#8X p5E|0p jytfGE: public class FileSplitterFetch extends Thread { >wZ!1Jq hmQD-E{Ab 7n5bI\ String sURL; //File URL D.X%wJ8 long nStartPos; //File Snippet Start Position &vo]l~. long nEndPos; //File Snippet End Position )0YMi!&j` int nThreadID; //Thread's ID .Q4EmpByCg boolean bDownOver = false; //Downing is over flnoK%wi boolean bStop = false; //Stop identical I@e{>} FileAccessI fileAccessI = null; //File Access interface yPKeatH] X]M)T B]#0]-ua public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException y1B3F5 { MYDAS- this.sURL = sURL; .(ki(8Z N this.nStartPos = nStart; aOETms w this.nEndPos = nEnd; Ub%5# <k|- nThreadID = id; 7C
F-?M! fileAccessI = new FileAccessI(sName,nStartPos);//定位 :k#Y|( } $s5LzJn ?=$a6o fMy7pXa_ public void run() ['Hl$2 j { 3t)07(x_B while(nStartPos < nEndPos && !bStop) c\065#f! { ?l
&S:`
L @/g%l1$` ML9ZS
@ try{ q]DV49UK URL url = new URL(sURL); M|w;7P} HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); o+r?N5 httpConnection.setRequestProperty("User-Agent","NetFox"); RQ;pAO String sProperty = "bytes="+nStartPos+"-"; %A|9=x* httpConnection.setRequestProperty("RANGE",sProperty); @2na r< Utility.log(sProperty);
qH1[BsOx V>>"nf,YO s3Pr$h InputStream input = httpConnection.getInputStream(); `A_CLVE //logResponseHead(httpConnection); Z%E;*R2+:> -W38#_y/\ `q@5d&d`j byte[] b = new byte[1024]; dDK4I3a int nRead; B4Ko,=pg while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) O/Ub{=g { O~?H\2S nStartPos += fileAccessI.write(b,0,nRead); &@p _g8r# //if(nThreadID == 1) P:,' // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); Up*1j:_O } w\ 4;5.$ 1zqIB")s> c5C 2xE}T Utility.log("Thread " + nThreadID + " is over!"); `K5Lp>=R bDownOver = true; -FftEeo7 //nPos = fileAccessI.write (b,0,nRead); <#/r.}.x } O<[h catch(Exception e){e.printStackTrace ();} 5tfD*j n } zW.I7Z0^ } 8S/SXyS q$RJ3{Sf UVa:~c$U4 //打印回应的头信息 {,xI|u2R public void logResponseHead(HttpURLConnection con) }% 2hBl/ { mqe83 k% for(int i=1;;i++) cBcfGNTJ~ { $]LhE:!G String header=con.getHeaderFieldKey(i); {;mT.[ if(header!=null) Uao8#<CkvJ //responseHeaders.put(header,httpConnection.getHeaderField(header)); rG[iEY Utility.log(header+" : "+con.getHeaderField(header)); ]+4QsoFNt else )bqSM&SO break; <KY \sb9 } +\Uq=@ } zy8Z68%E`* q~:H>;:G- R%Xhdcn7 public void splitterStop() J n>3c { ?OjZb'+=K bStop = true; ]? 2xS?vd } lB)%s~P:s 96ydcJY0' 2><=U7~ } ~t=73fwB Sjb[v LK>AC9ak< /* }^Ymg7wA **FileAccess.java fI<|]c}P&J *//文件访问(定位,写) [KcF0%a package NetFox; ;r8<
Ed import java.io.*; zjE|UK{ WNnB
s )70i/%}7 public class FileAccessI implements Serializable{ ]`+J!G, 'v^Zterr //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 g$/C-j4A[ RandomAccessFile oSavedFile; 7=hISQMsVP long nPos; u=QG%O#B pLdZB9oD]C l@W1bS public FileAccessI() throws IOException D`9 a"o { &"gQrBa this("",0); QJ4=*tX) } ztEM>xsk _8 C:Md` {,X}Btnwp public FileAccessI(String sName,long nPos) throws IOException F[@M? { )lhPl oSavedFile = new RandomAccessFile(sName,"rw"); #@UzOQ> this.nPos = nPos; aam6R/4 oSavedFile.seek(nPos); S"<"e\\}"_ } ?9Hs,J 1 !8
b9 ?mi1PNps# public synchronized int write(byte[] b,int nStart,int nLen) <*Bk.>f! { ']&rPvkL int n = -1; Z1dLC'/b] try{ EEJ OJ< oSavedFile.write(b,nStart,nLen); vT=?UTq n = nLen; )` z{T } /^pPT6 catch(IOException e) .,*68S0k7 { +1pY^#A e.printStackTrace (); qP5'&!s&! } &:?2IAe yx\I&\i BM>'w,$KL return n; MhL>6rn } /H'F4-> _`~\zzUZ U9t-(`[j? } %] #XI r SL$ bV2T H"vkp~u]I /* :vXlni7N[M **SiteInfoBean.java cCBYM */ G$oi>zt3 package NetFox; mx=2lL` xgq
`l# Wz+7CRpeP public class SiteInfoBean { x='T`*HD vrX@T?> &|YJ?}, private String sSiteURL; //Site's URL a+=.(g private String sFilePath; //Saved File's Path HP(dhsd<c private String sFileName; //Saved File's Name lN~V1(1B private int nSplitter; //Count of Splited Downloading File xe@11/F
!XQq* .H#<yPty public SiteInfoBean() 4apaUP=Jp {//nSplitter的缺省值为5 vw)lD9-" //default value of nSplitter is 5 Me2qOc^Z- this("","","",5); zEy,aa:M } ',bSJ4)Y zPc kM) 2Fc>6]:* public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) SUN!8
qFA { k1E(SXcW9 sSiteURL= sURL; kK~,?l sFilePath = sPath; nm#,oX2C sFileName = sName; 60z8U#upM this.nSplitter = nSpiltter; V.|#2gC]t RAU" $!v:@vNMs } (~N[j;W,_W AMre(lgh I%M"I0FV public String getSSiteURL() #p7K2 { $(fhO return sSiteURL; !g7lJ\B } Xj5oHHwn 6olJ7`* o2rL&
public void setSSiteURL(String value) 952l1c! { y8j6ttQv=t sSiteURL = value; 2Y~nU(
} 0b(x@> de_%#k1:L `6xr:s public String getSFilePath() l05'/duuJ { *!^l
ZpF return sFilePath; enT[#f[{ } |*(R$t X MqjdW VT [TE public void setSFilePath(String value) -?p4"[ { {Jc.49 sFilePath = value; :Z&<5 } ^v5<* uf%m <Uc?#;%Y} YY4q99^K public String getSFileName() ./35_Vy/O { 7 T return sFileName; yJ4ZB/ZQ } Zo<j"FG xmi@
XL@t 9Cz|?71 public void setSFileName(String value) <,*3Av { ,lcSJ^yr sFileName = value; NwyNl } K%ptRj$ VWK%6Ye0 ?$#P
=VK public int getNSplitter() ^^B~v<uK { yA#nnu1 return nSplitter; 4L_)@n} } 3sD|R{ b|-S;cw [\qclW;L public void setNSplitter(int nCount) AsI\#wL) { <HnpI nSplitter = nCount; hp`ZmLq/[ } 55FRPNx-x } /gn!="J qKrxln/T O(6j:XD /* k [LV^oEg **Utility.java c \;_jg */ >Ptu-* package NetFox; GvZ[3GT @nAl*#M*D *M/:W =,t public class Utility { zdm2`D;~p Cu!]-c{ hd]ts. public Utility() THARr#1b}; { '50}QY_R. d<6m_!L CXi[$nF3 } md,KRE >g m //线程睡眠 !ewT#afyu( public static void sleep(int nSecond) t3h ){jZ { Sy']fGvx try{ %DA&txX}w Thread.sleep(nSecond); o7s!ti\G }
kD0bdE| catch(Exception e) H'JU5nE { u-_1)' e.printStackTrace (); F0~<p[9Nx } [N12X7O3 } f!{@{\ K:^0*5Y-k //日志 ITg<u?z_ public static void log(String sMsg) -QwH| { G{I),Y~IF System.err.println(sMsg); 4Us_Z{. } yRIXUCy C}(@cn `L XT4Gz|k public static void log(int sMsg) Svb>s|D { Inn{mmz
1 System.err.println(sMsg); YM};85 K } * k<@ } aZ+><1TD zgH(/@P U`lK'.. /* :PtZKt;~X **TestMethod.java ~USt&? */ 1Qu@pb^ package NetFox; |JP19KFx'B 9Msy=qvYG z~ywFk}KGd public class TestMethod { R|v'+bv
DzQ </WeB3#6 public TestMethod() xDGS`o_w_ { ///xx/weblogic60b2_win.exe o<G#%9j try{ a&V;^ / SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); R(`:~@3\6 //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); D}q"^"#T SiteFileFetch fileFetch = new SiteFileFetch(bean); tq}45{FH3 fileFetch.start(); m3TR}=n } u8]FJQ*\6+ catch(Exception e){e.printStackTrace ();} MUAs(M; kQ lU.J>^ ](A2,F
9(U } xH xTL>,? Vv45w#w; mL=d EQ public static void main(String[] args) PO`p.("h { Aeb(b+= new TestMethod(); pK@=]K~l0 } 8.[F3Tk= } Jsysk $R 点击下载更多相关资料
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