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/* m\xE8D(, **SiteFileFetch.java )mMHwLDwH */ f_GqJ7Gk] package NetFox; N_"mC^Vx import java.io.*; ,
H_Cn1l import java.net.*; 1]vrpJw uyITUvPg[ m;d#*}n\p public class SiteFileFetch extends Thread { 7'9~Kx&+ Iz<}>J B IT_Fs|$ SiteInfoBean siteInfoBean = null; //文件信息Bean 5%n long[] nStartPos; //开始位置
W{2(fb long[] nEndPos; //结束位置
Q>}*l|Ci FileSplitterFetch[] fileSplitterFetch; //子线程对象 I`e|[k2 long nFileLength; //文件长度 J 4E G boolean bFirst = true; //是否第一次取文件 +iYy^oXxw boolean bStop = false; //停止标志 7+vyN^XJ"5 File tmpFile; //文件下载的临时信息 {qHf%y&[ DataOutputStream output; //输出到文件的输出流 &jHnM^nQ F&om^G'U //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) Jr4^@]78o< public SiteFileFetch(SiteInfoBean bean) throws IOException p%v+\T2r { RvT>{G~ siteInfoBean = bean; C!8XFf8e //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); 5ZkMd!$y tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); LMmW3W`
if(tmpFile.exists ()) Be(h x { Jm+;A^; bFirst = false; ;8
D31OT read_nPos(); ,!?&LdPt> } k )T;WCia else wZA(><\ { "`AIU}[_I nStartPos = new long[bean.getNSplitter()]; UlN+ nEndPos = new long[bean.getNSplitter()]; D20n'>ddg } E|jbbCZy2 vNJ!d |-c)OS3#D /~Q2SrYH } yI 6AafS~ W c"f 'bpx public void run() M#Vl{ b { 9_mys}+ //获得文件长度 "=uphBZog //分割文件 eh-/,vmRa //实例FileSplitterFetch HV^*_ //启动FileSplitterFetch线程 +8 avA:o //等待子线程返回 k%?fy try{ b{KpfbxcI if(bFirst) 9oL/oL-J/ { H"H&uA9" nFileLength = getFileSize(); 6jiz$x if(nFileLength == -1) jMvWS71 { B|-E3v:f4 System.err.println("File Length is not known!"); IZV D.1 } .OHjn| else if(nFileLength == -2) {VPF2JFB[ { h4 s!VK1X System.err.println("File is not access!"); ZCZY gf@ } mRT`'fxK else R30{/KK { m
4VhR_ for(int i=0;i<nStartPos.length;i++) (q!tI*} { AK/_^?zA s nStartPos = (long)(i*(nFileLength/nStartPos.length)); xA-O?s"CY } RSLMO8 for(int i=0;i<nEndPos.length-1;i++) Jp<Y2- { TixXA:Mf nEndPos = nStartPos[i+1]; BK>uJv-qU } .r/6BDE" nEndPos[nEndPos.length-1] = nFileLength; {BBL`tg60 } Azun"F_f } C~.7m-YW W[]N.d7G 5sD\4 g)HK //启动子线程 _N 5$>2 fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; |RBgJkS;8 for(int i=0;i<nStartPos.length;i++) .6yC' 3~;o { #TLqo(/ fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), C< GS._V& siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), lZ5 lmsCU nStartPos,nEndPos,i); d`U{-?N> Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); }];8v+M fileSplitterFetch.start(); +j._NRXRH } /h=:heS4$ // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), V/Q~NXN siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); 8m0GxgS // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", 1k2+eI nEndPos = " + nFileLength); 3_JxpQg // fileSplitterFetch[nPos.length-1].start(); oe$Y=` 5+<<:5_6l lS.*/u*5 //等待子线程结束 ^[{\ZX //int count = 0; _VFxzM9f //是否结束while循环 rULrGoM boolean breakWhile = false; y'ULhDgq^B )N!-g47o%# z>$AZ>t%J$ while(!bStop) iXpLcHi { >D'Kt?L<]m write_nPos(); R(Y4n w+Y- Utility.sleep(500); ]i\C4* breakWhile = true; ^W-03 J0@
^h _<x4/".}B3 for(int i=0;i<nStartPos.length;i++)
V_*TY6 { k[3J5 4`g1 if(!fileSplitterFetch.bDownOver) /8 /2#`3R { h?H:r <
breakWhile = false; :G?6Hl)~) break; L$*sv. } -DgJkyt+< } qH(3Z^ #.| if(breakWhile) G|5M~zP break; *G|w#-\.c C^vB&3ghi G?\\k[#,& //count++; Ys |n9pW //if(count>4) '5j$wr zt // siteStop(); /$v0Rq9 } 'Q\I@s } <C0~7]XO &HdzbKO= System.err.println("文件下载结束!"); bnS"@^M } A*)G. o: catch(Exception e){e.printStackTrace ();} MpZ
# } f=%k9Y*) +D
,Nd=/ hiKgV|ZD //获得文件长度 gc|?$aE public long getFileSize() "p<B| { u;$g13 int nFileLength = -1; =?Y%w%2 try{ Kfho:e, URL url = new URL(siteInfoBean.getSSiteURL()); Ys8p,.OMs HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); KrwG><+j httpConnection.setRequestProperty("User-Agent","NetFox"); FM\yf]' }[a 5.st!Lp1 int responseCode=httpConnection.getResponseCode(); q.]>uBAQ? if(responseCode>=400) nqX)+{wAXe { E3bS Q processErrorCode(responseCode); @k_xA-a return -2; //-2 represent access is error ~V,~'W } +k=BD s tBSHMz l#!p?l String sHeader; 6ybpPls QH:PClW![ r q2]u for(int i=1;;i++) nt$VH { ,9T-\)sT //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); q'r(#,B<3 //Utility.log(in.readLine()); 7A!E~/nSC sHeader=httpConnection.getHeaderFieldKey(i); JO\F-xO if(sHeader!=null) 9b
K K { obYXDj2 if(sHeader.equals("Content-Length")) 2)O-EAn { =7&2-'(@ nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); w}*2Hz&Q! break; j6zZ! k } -rC_8.u : } fB~BVYi else +6cOL48" break; ZH]n&%@j } u=epnz:< } n}NO"eF>-s catch(IOException e){e.printStackTrace ();} FjUf| catch(Exception e){e.printStackTrace ();} 4.?tP7UE N7/eF9 1A>>#M=A Utility.log(nFileLength); FdT@} $LxfdSa ;MD6iBD return nFileLength; GEJEhwO;H } eBw6k09C+ QFn .<@ R $vo //保存下载信息(文件指针位置) p#['CqP8 private void write_nPos() F(jvdq { .Sz<%d7XIQ try{ xiv1y4(% output = new DataOutputStream(new FileOutputStream(tmpFile)); 2<18j output.writeInt(nStartPos.length); [ArPoJt for(int i=0;i<nStartPos.length;i++) GR@jn]50 { E_t ^osY& // output.writeLong(nPos); '`.bmiM output.writeLong(fileSplitterFetch.nStartPos); BT?)-wS output.writeLong(fileSplitterFetch.nEndPos); dEz7 @T } ,yZvT7 output.close(); sj@B0R=Qo } ^zdZ"\x catch(IOException e){e.printStackTrace ();} Z_Tu*
F catch(Exception e){e.printStackTrace ();} gQXB=ywF } #=>t6B4af XYeuYLut PjL"7^Q& //读取保存的下载信息(文件指针位置) @qC](5|TQ private void read_nPos() }E?{M~"< { K,pQ11J try{ y'gIx*6B@ DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); lIs<&-0 int nCount = input.readInt(); v.wHj@ nStartPos = new long[nCount]; DB1F_! 9 nEndPos = new long[nCount]; 37j-FLbW for(int i=0;i<nStartPos.length;i++) C_c*21X { 4dfR}C nStartPos = input.readLong(); Ygwej2 nEndPos = input.readLong(); <$#;J>{WV } (%`R{Y input.close(); gpo+-NnG } Ebmd[A&& catch(IOException e){e.printStackTrace ();} (QARle(i catch(Exception e){e.printStackTrace ();} U
_QCe+ } RgF5w<Vd. ~7$NVKE F=/@D)hND private void processErrorCode(int nErrorCode) ;>#YOxPl { s>i`=[qFc System.err.println("Error Code : " + nErrorCode); Sb9O#$89 } bf9LR1 "mBX$t'gb "YUh4uZ~P //停止文件下载 -F&4<\=+ public void siteStop() 1 uKWvp0\ { o;d>< bStop = true; #!a}ZhIt for(int i=0;i<nStartPos.length;i++) fu}ZOPu fileSplitterFetch.splitterStop(); ^ Tr )gik p3sR>ToJ h[%t7qo= } 3%"r%:fQB/ } bV'^0(Zv //负责部分文件的抓取 K6C@YY( **FileSplitterFetch.java X`REhvT */ @wzzI 7}C package NetFox; u0Nag=cU g;|3n& _A[k&nO!&J import java.io.*; Klw\ import java.net.*; jB"?iC. 9Z KB, yXuc<m public class FileSplitterFetch extends Thread { KF'DOXBw> dZSv=UY) 3,Dc}$t String sURL; //File URL Stw%OP@? long nStartPos; //File Snippet Start Position 0N" VOEvG long nEndPos; //File Snippet End Position DH3.4EUWS int nThreadID; //Thread's ID :P!"'&gCL boolean bDownOver = false; //Downing is over 7U:-zfq boolean bStop = false; //Stop identical O@[jNs)]. FileAccessI fileAccessI = null; //File Access interface F@+FXnz {
S]"-x tH7@oV; public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException 9e`.H0 { j,HUk,e^& this.sURL = sURL; tC4:cX this.nStartPos = nStart; |H!kU.f] this.nEndPos = nEnd; mBp3_E.t nThreadID = id; PNjZbOmzS fileAccessI = new FileAccessI(sName,nStartPos);//定位 }"V$li } zvzS$Gpe N+l 0XjZD9 A,P_| public void run() dZMOgZ.!yr { fR:BF47 while(nStartPos < nEndPos && !bStop) _ct18nh9 { oNkASAd V>8)1)dF "kYzgi try{ Y,?!" URL url = new URL(sURL); CG`s@5y>5 HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); __F?iRrCM httpConnection.setRequestProperty("User-Agent","NetFox"); eU[f6OGqC String sProperty = "bytes="+nStartPos+"-"; f{} zqCK httpConnection.setRequestProperty("RANGE",sProperty); @Lp;p$G` Utility.log(sProperty); ?0ezr[`. Aqc
Cb[1r fmDn1N-bG InputStream input = httpConnection.getInputStream(); 2l7Sbs7 //logResponseHead(httpConnection); /b44;U`v5- 'aq9]D_k Z~JX@s0v byte[] b = new byte[1024]; 3)?v int nRead; *{ =5AW}o while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) 2jMV6S9 { 72YL
nStartPos += fileAccessI.write(b,0,nRead); "*ot:;I //if(nThreadID == 1) yB>5p]$P // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); H
3e(- } M[;N6EJH Qh3V[br QG|KZ8uO Utility.log("Thread " + nThreadID + " is over!"); vf|lF9@U bDownOver = true; } Fw/WD //nPos = fileAccessI.write (b,0,nRead); 0<,Q7onDD: } +IRr&J*P catch(Exception e){e.printStackTrace ();} pPC_ub } 0:,8Ce } X2Z
E9b yq?7!X M-K.[}}-d //打印回应的头信息 `u. /2]n public void logResponseHead(HttpURLConnection con) 86]})H { S%+$ for(int i=1;;i++) YTQom!O { &8l4A=l$ String header=con.getHeaderFieldKey(i); Mp8FYPjZ if(header!=null) #6jdv|fu //responseHeaders.put(header,httpConnection.getHeaderField(header)); r_5k$u( Utility.log(header+" : "+con.getHeaderField(header)); 6I)1[tU else X_j=u1*5 break; 3eq VY0q } >N&C-6W } QGWfF,q oAMB}a; AK#`&)0i public void splitterStop() .7BB*!CP { [P,/J$v^~ bStop = true; %LL*V| } ylV.ZoY6 O_f+#K) oX2J2O } FY^#%0~ LC!ZeW35 #ny&bJj /* 5i 6*$#OM_ **FileAccess.java c]pO'6] *//文件访问(定位,写) BFCF+hU^6R package NetFox; _?5$ST@5 import java.io.*; 2'R&K +<^TyIJ0 +
lha= public class FileAccessI implements Serializable{ Bn[5M[ F(-1m A&- //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 ?q68{!{bi RandomAccessFile oSavedFile; U?MKZL7 long nPos; 208 dr*6U nvJ2V$ p|W <xFk public FileAccessI() throws IOException F$Cf\#{3 { !kPZuU`T this("",0); m&'z|eN } ^'g1? F$_ QQd%V#M? *@M7J public FileAccessI(String sName,long nPos) throws IOException SqiLp!Y` { K?y!zy oSavedFile = new RandomAccessFile(sName,"rw"); wbC'SOM this.nPos = nPos; %cWy0:F5VY oSavedFile.seek(nPos); qJ;T$W=NG } w
Wx,}= P5:X7[ `OY_v=} public synchronized int write(byte[] b,int nStart,int nLen) :&]THUw { . PzlhTL7 int n = -1; 2Z ?
N try{ dMA"% R oSavedFile.write(b,nStart,nLen); ~}SOd<n)| n = nLen; UUxDW3K } ..ig jc#UF catch(IOException e) N"i'[!H% { @ =RH_NB e.printStackTrace (); =5JTVF } +sTZ)
5vQ =4;GIiF@ u6~|].j R return n; o'W[v0>
L- } x?ajTzMv .K`^n\T
t 'qosw:P } G(alM=q u-CC UMR {y{&tzZ /* HWr")%EhD **SiteInfoBean.java DhQYjC[ */ #+1*g4m~B package NetFox; ]LvpYRU$P [*-DtbEk QfI)+pf public class SiteInfoBean { 4eSV(u)4 EZm6WvlxSI UuV<#N) private String sSiteURL; //Site's URL 0n<t/74 private String sFilePath; //Saved File's Path P|"U private String sFileName; //Saved File's Name mUj=NRq private int nSplitter; //Count of Splited Downloading File G/F0)M @K 8sNPK @wWro?s'p public SiteInfoBean() J!Kk7!^| {//nSplitter的缺省值为5 Y.O/~ af //default value of nSplitter is 5 zSYh\g" this("","","",5); 9(%ptnya } &Rgy/1 /4\!zPPj. 7Y:~'&U| public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) oGzZ.K3 A { y;N[#hY#CD sSiteURL= sURL; 0Ey*ci^ue sFilePath = sPath; $K)9(DD sFileName = sName; 0|0<[:(hc this.nSplitter = nSpiltter; u vo2W! C|kZT<,] MIcF"fB![ } 2
{lo `+~@VZ3m \9T;-] public String getSSiteURL() OzFA>FK0f; { WJG& `PP return sSiteURL; L< MIl[z7 } EwSE;R - (
}DCy23 :*wnO;eN public void setSSiteURL(String value) jk0Ja@8PK { C0\A sSiteURL = value; AiXxn'&i } 5feCA ,v7 R3]Ra&h6N) m6P!#=a:l< public String getSFilePath() &n%
3rC5{ { `(|jm$Q return sFilePath; Bc{#ia } iJg3`1@j :Mss"L820 Q3SwW public void setSFilePath(String value) q]%c
6{w { kRBPl99 sFilePath = value; Nl_Sgyx,\ } ,B>Rc# ;>o}/h b469 public String getSFileName() sjLI^#a { Vi~9[&.E\! return sFileName; em@\S } j HT2|VGb* \lVX~r4 I!y[7^R public void setSFileName(String value) }.<%46_Z- { ]KMOLe6( sFileName = value; hSmu"a,S } utq*<,^ C LhD[/Fo JFx=X=C public int getNSplitter() )-FQ_K% { !BHIp7p return nSplitter; CVsc#=w0 } ,Yg<Z1 w,
u`06 Aj06"ep public void setNSplitter(int nCount) 28L3"c { PjEKZHHz
nSplitter = nCount; ]XEkQ } &Y2mLPB } GI}h)T zT|]!', .'Vjs2 2 /* XDvT#(Pu **Utility.java <$s G]l!\ */ irNGURLm package NetFox; |9)Q =( ,4ftQJ
^a@Vn\V1 public class Utility { X*Mw0;+T v>TI.;{y W P1>) public Utility() C%<[mM { p1p4t40<l ;ti{
#(Ux WY%LeC!t } .$>?2|gRv gP*:>[lR //线程睡眠 2RDos# public static void sleep(int nSecond) 372ewh3' { jyPY]r try{ (S+tQ2bt Thread.sleep(nSecond); {#CyO
b4 } K /h9x9^ catch(Exception e) jp2AU,Cl { AF5.gk= e.printStackTrace (); /+G&N{)k } Au'[|Prr } Sk@~} Fl GKy9k //日志 vkan+~H public static void log(String sMsg) 5H#3PZaQ { ~SkdP7 ) System.err.println(sMsg); IMzhEm } LQSno)OZ GeN8_i[ o>{+vwK public static void log(int sMsg) XA{tVh { hQrO8T?2 System.err.println(sMsg); K"1xtpy } 5EDM?G } :0pxacD"! Y3jb'S4( DUiqt09`~ /* fL4F
~@`9l **TestMethod.java =8 d`qS" */ @"T_W(i;BI package NetFox; v"Bv\5f,Ys v`B7[B4K3 b9HE #*d, public class TestMethod { =rS z>l -nG3(n&wB O&]Y.Z9,A public TestMethod() 1tG,V%iCp { ///xx/weblogic60b2_win.exe ( B$;'U< try{ XiI@Px?FL SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); pLL
^R //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); Dm6WSp1|b SiteFileFetch fileFetch = new SiteFileFetch(bean); Bsw5A7,- fileFetch.start(); 94"R&| } pU)wxv[~ catch(Exception e){e.printStackTrace ();} ]>K%,}PS 7,ODh-?ez ,dKcxp~[ } 5nzkZw \}t(g}7T `bO+3Y'5 public static void main(String[] args) Ps0'WRJnx { ' -[ new TestMethod(); d;|Pp;dc } ciI;U/V } z (r Q6 点击下载更多相关资料
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