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/* \OVw **SiteFileFetch.java J5SOPG */ PJ2m4ulY package NetFox; 7-MyiCt import java.io.*; kk ZMoK import java.net.*; b|u,[jEB v-XB\|f no9=K4h` public class SiteFileFetch extends Thread { %h}3}p#4 'Ooq.jaK;/ #K\;)z(? SiteInfoBean siteInfoBean = null; //文件信息Bean \
m g long[] nStartPos; //开始位置 ~' q&rvk` long[] nEndPos; //结束位置 15ImwQ FileSplitterFetch[] fileSplitterFetch; //子线程对象 (``|5;T\ long nFileLength; //文件长度 3yu,qb'"& boolean bFirst = true; //是否第一次取文件 dF'oZQz boolean bStop = false; //停止标志 iCdq-r/r!6 File tmpFile; //文件下载的临时信息 Z4{~ DataOutputStream output; //输出到文件的输出流 :tp{(MF Y|L]# //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) G$1gk ^G's public SiteFileFetch(SiteInfoBean bean) throws IOException 5](,N^u{): { #Kt5+"+7 siteInfoBean = bean; v7mg8' //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); uZ+vYF^ tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); BV
eIj } if(tmpFile.exists ()) gPF5|% 3) { "tz`@3,5dN bFirst = false; w%eEj.MI|i read_nPos(); iJzW3%E } c:,K{ZR else !CLL{\F { vnH[D)`@ nStartPos = new long[bean.getNSplitter()]; Vm%0436wOY nEndPos = new long[bean.getNSplitter()]; a]=j } 85#+_}# ?}<Wmy2A &NK6U j,v2(e5: } j] U}SN#[* _Sult;y"u public void run() ^i6`w_ / { @.l?V6g9T //获得文件长度 -bp7X{& //分割文件 6mC% zXR5 //实例FileSplitterFetch V?4G~~F //启动FileSplitterFetch线程 *7K)J8kq //等待子线程返回 1VB{dgr try{ aKw7m={ if(bFirst) _}Ec[c { qQe23,x@5 nFileLength = getFileSize(); @^^,VgW[ if(nFileLength == -1) E\XD~ { |1UJKJwX System.err.println("File Length is not known!"); 92g&,Wb } kXW$[R else if(nFileLength == -2) W)2ZeH* { T4x[
\v5d System.err.println("File is not access!"); ;{ESo?$* } -](3iPy} else NXdT"O=P { N>',[4pJ| for(int i=0;i<nStartPos.length;i++) 6adXE { rM)-$dZ nStartPos = (long)(i*(nFileLength/nStartPos.length)); 2IFEl-IB[ } =R0#WMf$@ for(int i=0;i<nEndPos.length-1;i++) %$zX a%A { dwmZ_m. nEndPos = nStartPos[i+1]; |"k+j_/+ } z>O =. Ku6 nEndPos[nEndPos.length-1] = nFileLength; Tw!_=zy(Gw } )X5en=[)O } (kZ2D R%)7z)~ kT4Oal+4 //启动子线程 a'YK1QX fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; |v= */e for(int i=0;i<nStartPos.length;i++) YE1X*'4 { ( 2i{8 fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), Y1L7s H 9 siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), 0 A6%!h nStartPos,nEndPos,i); }yMAs Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); ZR@PqS+O/ fileSplitterFetch.start(); N.|uPq$R } DeGcS1_? // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), hV[= siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); _sC
kBDl- // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", "yc@_+"\+ nEndPos = " + nFileLength); qb>mUS // fileSplitterFetch[nPos.length-1].start(); }XIUz| ^3w
>:4m |f<-lB[k //等待子线程结束 75RQ\_zDu //int count = 0; Hy#<fKz`! //是否结束while循环 P> ilRb boolean breakWhile = false; .dl4f"k `Y.Q{5Y \,yX3R3}.~ while(!bStop) kac]Rh8vO { 4
X6_p( write_nPos(); =Vi>?fWpn= Utility.sleep(500); AJR`ohh breakWhile = true; lb[\Lzdvmu W5zlU2 i2m+s; for(int i=0;i<nStartPos.length;i++) xGo,x+U* { <ly.l]g if(!fileSplitterFetch.bDownOver) Evb %<`gd { ewp&QH4 breakWhile = false; Nt
P=m
@ break; 2j*o[kAE } !;COFR } z.] if(breakWhile) aW7)}"j4 break; O`Ge|4 Q*l_QnfG +!)v=NY //count++; 8ZvozQE //if(count>4) wU)vJsOq // siteStop(); +N>&b% } /GMT Mh*^@_h? }@avGt;v System.err.println("文件下载结束!"); }^}ep2^ } Qr$Ay3#k catch(Exception e){e.printStackTrace ();} \KT}T } R,KoymXP LGF5yRk qo62!q //获得文件长度 M_EXA _ public long getFileSize() 18kzR6(W { N!W2O>VS int nFileLength = -1; zd^QG try{ T{Y;-m URL url = new URL(siteInfoBean.getSSiteURL()); Cz]NSG 5 HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); K!BS?n; httpConnection.setRequestProperty("User-Agent","NetFox"); >r~!'Pd! Gs)2HR@> `]3A#y)v int responseCode=httpConnection.getResponseCode(); fC^POLn[f if(responseCode>=400) !;~6nYY { nK;c@!~pS processErrorCode(responseCode); E G3?C return -2; //-2 represent access is error S6bW?8` } cR"?EQ] `N wSd o7Lb #JIh-h@ String sHeader; Fi_JF; ?5MOp IW-lC{hK for(int i=1;;i++) +-+%6O<C { =&xNdc //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); #gd`X|<Ch //Utility.log(in.readLine()); gdkQ
h_\ sHeader=httpConnection.getHeaderFieldKey(i); =TG[isC/F9 if(sHeader!=null) CAvyS { BA t0YE`-, if(sHeader.equals("Content-Length")) TSHQ>kP { m C&*K nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); \C.s%m break; )mF;^3 } vS_Ji<W~E } sGs_w:Hn else 7.N~e}p8 break; \OX;ZVb?5 } | Xv]s61 } $m)[> C catch(IOException e){e.printStackTrace ();} )S2GPn7 catch(Exception e){e.printStackTrace ();} 7U_OUUg `X ;2lgL 9et%Hn.K' Utility.log(nFileLength); N5\]VCX _6k ej#o8 7C"&f *lEi return nFileLength; !H[K"7w } `$N()P HE0@`(mCpa 98x&2(N //保存下载信息(文件指针位置) d iG kwKj private void write_nPos() jdWA)N}kDG { 8%W(",nd try{ 1 /dy@' output = new DataOutputStream(new FileOutputStream(tmpFile)); "ABg,^jf output.writeInt(nStartPos.length); ir/-zp_ for(int i=0;i<nStartPos.length;i++) (^4V]N& { D?:AHj%gW // output.writeLong(nPos); ? <"H Io output.writeLong(fileSplitterFetch.nStartPos); c. ;}e:)s output.writeLong(fileSplitterFetch.nEndPos); wz{]CQ 7" } wW?/`>@ output.close(); >^5UXQr } Bc^MZ~+ip catch(IOException e){e.printStackTrace ();} ,8^QV3 catch(Exception e){e.printStackTrace ();} ym~ } o+j~~P <+\
w .! |}Wm,J //读取保存的下载信息(文件指针位置) B(TE?[ # private void read_nPos() "g=g' W# { ,q|;`?R; try{ e0; KmQjG DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); SZ'2/#R> int nCount = input.readInt(); WQ>y;fi5/{ nStartPos = new long[nCount]; U3UDA nEndPos = new long[nCount]; \2Atm,#4 for(int i=0;i<nStartPos.length;i++) xYUC|c1Q9 { X zF-g*e nStartPos = input.readLong(); k9Xv@v nEndPos = input.readLong(); gcKXda( } 5U!yc7eBI/ input.close(); n?=d)[] } fCa*#ME catch(IOException e){e.printStackTrace ();} }cPH}[$zF catch(Exception e){e.printStackTrace ();} +i0j3. } 8pZGu8 lUJ~_`D u{ +z?N private void processErrorCode(int nErrorCode) 7I0[Ii { Z>t,B%v System.err.println("Error Code : " + nErrorCode); )EhRqX9 } P^Tk4_,0 j{?ogFfi vl,Ff9 //停止文件下载 %{*A@jQsg public void siteStop() -m"9v%>Y { 2:4:Q[{A bStop = true; JsZLBq*lP for(int i=0;i<nStartPos.length;i++) 9\J.AAk~/ fileSplitterFetch.splitterStop(); <<5x"W(,
LI`H,2Km [')C]YQb= } ,N`cH\ } e*?@6E //负责部分文件的抓取 eF%>5 **FileSplitterFetch.java cFF'ygJ/ */ BV@xE package NetFox; ={]tklND io1hUZ AwQ7O z|( import java.io.*; QRL+-)DMc import java.net.*; iu9 <]1k 5tG\5
s`63
y&Z[ public class FileSplitterFetch extends Thread { |h6u%t2AY $YztLcn e_v_y$ String sURL; //File URL xb22: long nStartPos; //File Snippet Start Position EK=PY
long nEndPos; //File Snippet End Position 7q;wj~ int nThreadID; //Thread's ID u>y/<9]q8 boolean bDownOver = false; //Downing is over 1> IA9]D7 boolean bStop = false; //Stop identical z3mo2e FileAccessI fileAccessI = null; //File Access interface |K,[[D<R li7"{+ct L7rH=gZ&!] public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException l =Is-N` { ZtofDp5B this.sURL = sURL; }VDJ this.nStartPos = nStart; 5xIOi(3`Q this.nEndPos = nEnd; 'Xb?vOU nThreadID = id; N}rc3d# fileAccessI = new FileAccessI(sName,nStartPos);//定位 Gj ka % } !0DOj[" MLk%U 4 lK yeG( public void run() =_:Mx'7 { sb"h:i>O4 while(nStartPos < nEndPos && !bStop) kmZ
U;Z { vZJu=t I/`\>Hk 59X'-fg , try{ Y0Bd[ URL url = new URL(sURL); RJ0:O HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); k,0lA#> httpConnection.setRequestProperty("User-Agent","NetFox"); L_{gM`UFc String sProperty = "bytes="+nStartPos+"-"; e]k\dj;,^% httpConnection.setRequestProperty("RANGE",sProperty); ,E3Ze*(U Utility.log(sProperty); ^EFVjGM tYST&5Kh~ |Zm'! -_ InputStream input = httpConnection.getInputStream(); <Dq7^,}# //logResponseHead(httpConnection); {wwkbc* e.l3xwt>$ [MI ? byte[] b = new byte[1024]; 7S.E,\Tws int nRead; sOb=+u$$9 while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) m(rd\3d { ^W* 3S[-`g nStartPos += fileAccessI.write(b,0,nRead); eH' J //if(nThreadID == 1) 'eDV-cB // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); %RD%AliO}K } ]7:*A7/!. t=BXuFiu :9Mqwgk,;3 Utility.log("Thread " + nThreadID + " is over!"); )gPkL
r bDownOver = true; !'f.g|a //nPos = fileAccessI.write (b,0,nRead); ,%4~ulKMn } W)p?cK` catch(Exception e){e.printStackTrace ();} rOA{8)jIa* } Ds@nuQ } w3E#v&"=Y -![>aqWmj1 P&.-c _ //打印回应的头信息 U{?#W public void logResponseHead(HttpURLConnection con) ibL { JthW"{E for(int i=1;;i++) Q)L6+gW^ { W~Ae&gcn# String header=con.getHeaderFieldKey(i); v FWg0 $, if(header!=null) ]!'9Y}9a //responseHeaders.put(header,httpConnection.getHeaderField(header)); 7j~}M(s" Utility.log(header+" : "+con.getHeaderField(header)); S<Od`I else i{2ny$55h break; P`TJqJiY~ } CEl9/"0s6 } G/y;o3/[Z E;-*LT&{ s^zX9IVnp public void splitterStop() {}DoRpq= { :{'%I#k2 bStop = true; .X;DI<K } 7L !$hk ;+(EmD:Q . g8db d } r";;Fk#5 _,bDv`>Ra C<yjGtVD /* G^&P'* **FileAccess.java X|Rw;FY *//文件访问(定位,写) zn2Qp package NetFox; Dg'BlrwbR import java.io.*; e763yd i&Xjbcbp +XoY@|Djd public class FileAccessI implements Serializable{ Y
wu
> k :`<ME/"YE //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 o3,}X@p RandomAccessFile oSavedFile; \SyG#.$ long nPos; .Hm1ispq (K`@OwD K(75)/ public FileAccessI() throws IOException |$G|M=*LN { =l+~}/7'Z this("",0); eiJ~1HX) } {jOV8SVL GFfZ TA 3fd?xhWbN public FileAccessI(String sName,long nPos) throws IOException I'e`?H t { %shCqS oSavedFile = new RandomAccessFile(sName,"rw"); 4o,G[Cf_ this.nPos = nPos; vTq
[Xe" oSavedFile.seek(nPos); 9`T2 } qLa6c2o, yP0XA=,Y 2f0qfF public synchronized int write(byte[] b,int nStart,int nLen) HJ0Rcw% { (Q F-=o int n = -1; A#Ne07d try{ ?4H>1Wkb oSavedFile.write(b,nStart,nLen); K %.>o n = nLen; XkEE55#>| } jSdW?IH catch(IOException e) 3F?_{A { !~fy".|x e.printStackTrace (); M+GtUE~" } F42?h:y8I QQ\\:]iM k<QZ_*x}G return n; f?W" ^6Df } .M( [n- *_H^]wNJG aK?PK }@ } $*c!9Etl4 4`'V%)M ?F/)<r /* .kp3<. **SiteInfoBean.java Kdr}7#c */ bA02)?L package NetFox; \%Lj !\ @YHt[>*S DsCbMs=Y public class SiteInfoBean { tJ9gwx7Pg ZYs?65. 3_N1y private String sSiteURL; //Site's URL k~IRds@G private String sFilePath; //Saved File's Path [Y-3C47 private String sFileName; //Saved File's Name Z}yd`7 private int nSplitter; //Count of Splited Downloading File S t;@ZV SdNxSD$Q 8)XAdAr public SiteInfoBean()
, )PpE& {//nSplitter的缺省值为5 ;uN&yj<}a //default value of nSplitter is 5 Zy=DY this("","","",5); ]/{iIS_ } V@pUU~6R m_h$fT8
_ Wiere0 2* public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) }S 6h1X { P asVfC@ sSiteURL= sURL; C"R}_C|r)* sFilePath = sPath; &x)n K sFileName = sName; YYF.0G} this.nSplitter = nSpiltter; 0S&C[I
o6 K96N{"{iI% _3zJ.% } Iwe 9\!=i Rh%C$d( public String getSSiteURL() Svt%*j { Z. ,pcnaQb return sSiteURL; VYnB&3%DF } x{9$4d ,jdTe?[*^ 52.%f+Oa public void setSSiteURL(String value) 349BQ5ND { iiv`ji sSiteURL = value; C@!bd+' } m*vz ? $.x%G+ }% `f%/ public String getSFilePath() .$a|&P=S { kJpr:4;@_ return sFilePath; UL]zuW/ } }gKY_e3 *r|Zbxf( [BKOK7QK| public void setSFilePath(String value) cK\'D { %|B$y;q^3 sFilePath = value; +zZ]Txb( } 5#mHWBGd7 &Y1RPO41J z-^/<u1p public String getSFileName() ta0 ;:o?/d { X/FR e[R return sFileName; G6p R?K+ } V)]lca CPcB17! RmJ|g< public void setSFileName(String value) J~)JsAXAI { uvJmEBL: sFileName = value; V\=%u<f } #6mr'e1 xtK}XEhG! 6\USeZh public int getNSplitter() <jqL4!< { y(X^wC return nSplitter; zICAV -& } DaqlL YM#J_sy@J. ]l^"A~va public void setNSplitter(int nCount) zqxN/H]z { ?MOjtAG0_~ nSplitter = nCount; )i[K1$x2 } uTvf[%EHW } N`O0jH{ >N"=10 zvwv7JtB /* }ISR +./+ **Utility.java qRXHaQi@9 */ \m(>Q package NetFox; MbeK{8~E%l Z/LYTo$Bz 9Us'Q{CD public class Utility { JPpNCC.b \`W8#fob j43i:c;F public Utility() rh T!8dTk { Iv/h1j> H 83F]d+n u.2^t:A } h<i.Z7F;tj p+V::O&&r //线程睡眠 \O)u' Bu public static void sleep(int nSecond) 2{S*$K[M { .}Hs'co try{ ;ZTh(_7 Thread.sleep(nSecond); p1s|JI } S2?)Sb` catch(Exception e) YGhHIziI { x$KQ*P~q e.printStackTrace (); L#fS P } J]|S0JC` } 3iw.yR g_)i)V //日志 F6"Qs FG public static void log(String sMsg) =z'533C { m Gx{Vpt System.err.println(sMsg); 4MRN{W6 } 0OBwe6* RQ,X0pS qWJap-hb public static void log(int sMsg) {'cdi` { %:y"o_X_ System.err.println(sMsg); OT#foP } aZ}z/.b] } (, $Lp0mB7 n +dRAIqB
5"w% /* Tx(=4ALY **TestMethod.java 7eG@)5Uy */ ,.V=y% package NetFox; aZCxyoh + D!D}mPi[ 1~[GGl public class TestMethod { ~e=KBYDBu S9 @*g3 }R`}Ey|{ public TestMethod() =6BI[_0 { ///xx/weblogic60b2_win.exe hroRDD try{ P7!gUxcv9Y SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); \>+BvF //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); X:W}S/ SiteFileFetch fileFetch = new SiteFileFetch(bean); r]&&*: fileFetch.start(); <n0j'P>1 } cyWDtq catch(Exception e){e.printStackTrace ();} kS_37-; 3Z74&a$ ]o`FF="at } q[+V6n`Z5 W |+&K0M to)Pl}9QkK public static void main(String[] args) &sGLm~m# { Zk0? =f?j new TestMethod(); ?{>5IjL)en } Job&qW9W` } EiWd =jDm 点击下载更多相关资料
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