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/* XP
Iu]F **SiteFileFetch.java ]|\>O5eeu */ 3=eGS package NetFox; My43\p import java.io.*; xQ(KmP2hl import java.net.*; dpOL1rrE HT;QepY3 U Y?]\4Om public class SiteFileFetch extends Thread { HS7
G_ r^Rcjyc1 =;-ju@d SiteInfoBean siteInfoBean = null; //文件信息Bean %RR|QY* long[] nStartPos; //开始位置 oqU#I~ - long[] nEndPos; //结束位置 -|iA!w#31 FileSplitterFetch[] fileSplitterFetch; //子线程对象 =S7C(;=4 long nFileLength; //文件长度 EKJc)|8 boolean bFirst = true; //是否第一次取文件 8~L.6c5U boolean bStop = false; //停止标志 =dw*B File tmpFile; //文件下载的临时信息 ;@;ie8H DataOutputStream output; //输出到文件的输出流 W0 ,"V'C (H|d 3 //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) Ia>th\_& public SiteFileFetch(SiteInfoBean bean) throws IOException 9!/1F ! { l`w|o siteInfoBean = bean; tS.b5$Q //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); DB?PS^-2 tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info");
j9
&AMg if(tmpFile.exists ()) whp\*]8 { !gH.st bFirst = false; e+[J[<8 read_nPos(); :^.8 7>V7 } ,Z\,IRn else FYE9&{]h { *V<2\- nStartPos = new long[bean.getNSplitter()]; 6'lT`E| nEndPos = new long[bean.getNSplitter()]; [q|Q]O0 } #mFAl|O ^V;lZtZ Ognq*[om W&q5cz } ,%DAh x6cl(J} _(A+_| public void run() B
qiq { ]KPg=@Q/ //获得文件长度 KVe'2Q< //分割文件 cLk+( dn //实例FileSplitterFetch
Tee3U%Y //启动FileSplitterFetch线程 ^
cd5Zl //等待子线程返回 \\pyu]z try{ (Y@|h%1W if(bFirst) MM)/B>c Qt { ykl=KR nFileLength = getFileSize(); K{|dt W& if(nFileLength == -1) `Q_ R/9~ { HC, 0"W System.err.println("File Length is not known!"); @^jLYu|W } 4]Nr$FY else if(nFileLength == -2) 3ncvM>~g { vM;dPE7 System.err.println("File is not access!"); Dve5m= } T%#P??k else V<I${i$]0 { L|Gk}n for(int i=0;i<nStartPos.length;i++) /
{bK*A! { (ZR"O8 nStartPos = (long)(i*(nFileLength/nStartPos.length)); hl~F1"q) } 3 AF]en for(int i=0;i<nEndPos.length-1;i++) |>V>6%>vK6 { J0z0%p nEndPos = nStartPos[i+1]; 1s\hJATfz } xb_:9 nEndPos[nEndPos.length-1] = nFileLength; DG
FvRB } <^Nj~+G' } xE[tD? M{ gQt@xNO 1VsEic //启动子线程 xR%ayT. fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; )Ea_:C' for(int i=0;i<nStartPos.length;i++) M!i5StGC { -H;y_^2 fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), h>Pg:*N,( siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), $
T_EsnN nStartPos,nEndPos,i); u(a&x|WY Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); 6?x{-Zj^? fileSplitterFetch.start(); vrDRSc6_ } < tq9 // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), -k{R<L
siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); uk/+
i`= // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", DfFPGFv nEndPos = " + nFileLength); ]>i0;RME // fileSplitterFetch[nPos.length-1].start(); />7/S^ 2=
mD vw6FvE`lC //等待子线程结束 #a l^Uqd //int count = 0; #9"_|d=l //是否结束while循环 nx]b\A boolean breakWhile = false; R?Q-@N>wE ?LFSR i(kK!7W35 while(!bStop) <LZvh8 { mR@Xt# write_nPos(); n?tAa|_ Utility.sleep(500); ZEJadR breakWhile = true; D/`E!6Fk= Kn\(Xd.> pa73`Ca] for(int i=0;i<nStartPos.length;i++) x)5v8kgf { H)+kN'J if(!fileSplitterFetch.bDownOver) m%\[1|N { JH;DVPX9z breakWhile = false; Q^Z}Y~. break; [SvwJIJJ } ]}l!L; } _q$fw& if(breakWhile) `roSOX1f break; Oei2,3l,? jG :R\D}0 FI5C&d5d //count++; 3dphS ^X //if(count>4) 7T Bo*-! // siteStop(); PSE|4{' } *xC ' "c*|vE 'E,Yht=/} System.err.println("文件下载结束!"); r8.v0b"1 } :W.(,65c catch(Exception e){e.printStackTrace ();} :wAB"TCt0 } 1w^[Eno$$ ^)pY2t<^ +60;z4y}w //获得文件长度 .>&fwG public long getFileSize() [{*#cr f { uoHhp 4>^ int nFileLength = -1; vsR ^aVwVZ try{ LeCU"~ URL url = new URL(siteInfoBean.getSSiteURL()); U:e9Vq'N m HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); b2%[9)"I. httpConnection.setRequestProperty("User-Agent","NetFox"); KJfyh=AD( M8 }M*\2 /B7
GH5 int responseCode=httpConnection.getResponseCode(); mio'm if(responseCode>=400) XQ+hTtP { -9"Ls?Cu processErrorCode(responseCode); (?[cDw/{J: return -2; //-2 represent access is error '3->G/Pu } )O
Cr6UR |_*1/Wz@ |VL,\&7rk String sHeader; Nj\WvKG IWgC6)n@n ^S|^1 for(int i=1;;i++) tPHiz% { 4+ gA/< //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); Wg1WY}zG //Utility.log(in.readLine()); Y<XDR:]A, sHeader=httpConnection.getHeaderFieldKey(i); |93%, if(sHeader!=null) wP9C\W; { 91XHz14 if(sHeader.equals("Content-Length")) '5--eYG { 5KSsRq/8" nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); -(G2@NG break; !c7Od
)] } D>Z_N?iR } QPEv@laM else BKEB,K=K@ break; =Yk$Q\c } 0*/~9n-Vl } z-j \S7F catch(IOException e){e.printStackTrace ();} `39U I7 catch(Exception e){e.printStackTrace ();} O.dNhd$ *79<ypKG$ `h'^S,'* Utility.log(nFileLength); :O%O``xT 8Bvjj|~ (@ ngjbE+ return nFileLength; m.*+0NG } Q~kwUZ u4'Lm+&O .YkKIei //保存下载信息(文件指针位置) >Z%^|S9 private void write_nPos() oSoG&4 { K\q/JuDfc try{ #a&Vx&7L output = new DataOutputStream(new FileOutputStream(tmpFile)); +!(hd output.writeInt(nStartPos.length); |7-tUHMo[ for(int i=0;i<nStartPos.length;i++) HNPr|
( { ^ytd~iK8 // output.writeLong(nPos); $j/F7.S output.writeLong(fileSplitterFetch.nStartPos); V1G]LM output.writeLong(fileSplitterFetch.nEndPos); !QovpO">z } )94R\f output.close(); r%m2$vx# } ln.~ >FO catch(IOException e){e.printStackTrace ();} Mx
}(w\\T catch(Exception e){e.printStackTrace ();} :Us-^zVr } Ow
I?(ruL' 9[!
Hz)|X e_TM#J(3 //读取保存的下载信息(文件指针位置) ".u?-xcbJ private void read_nPos() 9maw+ c!~ { gyK"#-/_d try{ K*<n<;W DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); 9=SZL~#CE int nCount = input.readInt(); L!Ro`6|7; nStartPos = new long[nCount]; D-.>Dw: nEndPos = new long[nCount]; O\w%E@9Fh for(int i=0;i<nStartPos.length;i++) 82vx:*Ip!} { UgP5^3F2 nStartPos = input.readLong(); i@RjG nEndPos = input.readLong(); -1R~3j1_ } SZPu"O\ input.close(); tv2dyC&a } [Dhc9 catch(IOException e){e.printStackTrace ();} SYL$?kl catch(Exception e){e.printStackTrace ();} UnPSJ]VW }
P/Zo 6D OE6 @lX)dY private void processErrorCode(int nErrorCode) OL>/FOH:Fx { '54@-}D System.err.println("Error Code : " + nErrorCode); uFqH_04 } BSz\9 eT Wac8x%J
-=RXhE_{ //停止文件下载 rtpjx% public void siteStop() &}FYz8w 2/ { gLH(Wr~(a bStop = true; z 4-wvn<* for(int i=0;i<nStartPos.length;i++) t^'1Ebg fileSplitterFetch.splitterStop(); [{ pc1U- J L3A/^ %>.v[d1c } 7 mN?;X33 } ft7wMi //负责部分文件的抓取 ZFzOW **FileSplitterFetch.java Nl+2m4 */ b?$3jOtW package NetFox; g#AA.@/Z ~AO0(Lp V= _8G3 import java.io.*; (xTHin$ import java.net.*; $Z j. EPI*~=Z.U A1C@'9R*
public class FileSplitterFetch extends Thread { LF0~H}S;6B q\,H9/.0k T:ck/:ZH String sURL; //File URL 5HU>o|. long nStartPos; //File Snippet Start Position "*0
szz' long nEndPos; //File Snippet End Position $=bN=hE int nThreadID; //Thread's ID f,1rmX1 boolean bDownOver = false; //Downing is over 5Z:HCp-aG boolean bStop = false; //Stop identical >|s=l`"Xz FileAccessI fileAccessI = null; //File Access interface j@DyWm/7 @sDd:>t IE6/
E public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException @dXf_2Tv= { Cfj*[i4 this.sURL = sURL; `{/=i|6 this.nStartPos = nStart; z23KSPo this.nEndPos = nEnd; +k>v^sz nThreadID = id; 84{<]y fileAccessI = new FileAccessI(sName,nStartPos);//定位 N
8OPeY } __9673y 8,R]R= TwH(47|?Nt public void run() ,9rT|:N { 1/i| while(nStartPos < nEndPos && !bStop) 'L,rJ =M3 { yZ 9 *oDs }PXWRv.gW f|`{PP`\ try{ YGHWO#!Gp URL url = new URL(sURL); Cn"N5(i HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); gk&?h7P"< httpConnection.setRequestProperty("User-Agent","NetFox"); *~vRbD$q String sProperty = "bytes="+nStartPos+"-"; 0Zq"- httpConnection.setRequestProperty("RANGE",sProperty); UJZa1p@L Utility.log(sProperty); _CZ* z U*b SM8)L* HDaec`j InputStream input = httpConnection.getInputStream(); ]oY~8HW //logResponseHead(httpConnection); k\[2o }YjSv^ 0L6L_;o byte[] b = new byte[1024]; <7zpH SFBq int nRead; V_~wWuZ- while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) l>G#+#{ { t.w?OyO nStartPos += fileAccessI.write(b,0,nRead); kA3kh`l //if(nThreadID == 1) O$$N{ // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); '!0CwZ
7 } jIl-}/2 (=X16}n:> -P?}
qy^j( Utility.log("Thread " + nThreadID + " is over!"); Z+}SM]m bDownOver = true; KGJB.<Be //nPos = fileAccessI.write (b,0,nRead); lz( 9pz } wEp/bR1= catch(Exception e){e.printStackTrace ();} 6Q`ce!~$ } \-B>']:R4 } JdAjKN X bg7mj9c )SQ g //打印回应的头信息 E|6|m8 public void logResponseHead(HttpURLConnection con) 81g&WQ' { jm?mO9p~ for(int i=1;;i++) MG<~{Y84} { X6;aF;"5 String header=con.getHeaderFieldKey(i); Y~C S2%j if(header!=null) QQw^c1@ //responseHeaders.put(header,httpConnection.getHeaderField(header)); vi2xonq^ Utility.log(header+" : "+con.getHeaderField(header)); LgaJp_d>9* else c:iMbJOn# break; v6rw. } <s:Xj } HP8pEo0Y O+yR+aXr'8 C{Zv.+F public void splitterStop()
2O
{ itvwmI,m\ bStop = true; L`!sV-. } I@\{6hw |&'*Z\*ya M]2 c- } 7%<jZ= Ns $PS\ LY>JE6zTt /* /t/q$X **FileAccess.java E,X,RM~
+D *//文件访问(定位,写) p-}:7CXP package NetFox; 4S=lO?\"A import java.io.*; #Z.JOwi RS1oPY
+2g3%c0} public class FileAccessI implements Serializable{ c;e,)$)-| V~wmGp.e //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 v:>P;\]r9M RandomAccessFile oSavedFile; 7-LeJRB long nPos; KV6S- ]+lr LiRY-;8= public FileAccessI() throws IOException HT]ubw]rJ { M(BZ<,9V this("",0); $@xkKe" } oHYD6qJX{ s6egd%r N3?d?+A$ public FileAccessI(String sName,long nPos) throws IOException vfm-K;,# { #7>CLjI oSavedFile = new RandomAccessFile(sName,"rw"); bcYz?o6 this.nPos = nPos; |(V3 oSavedFile.seek(nPos); -bE|FFU } I,[EL{fz n >Ei1 fP|\1Y?CS public synchronized int write(byte[] b,int nStart,int nLen) dO@iq^9- { 8a h]D int n = -1; r:IU+3 try{ n&fV3[m`2 oSavedFile.write(b,nStart,nLen); a$GKrc,z n = nLen; cwroG#jGT } m|k,8guG catch(IOException e) 7Av]f3Zr { lO
*Hv9# e.printStackTrace (); 4L0LT>'M\ } :uEp7Y4 pIXQ/(h31 wnX6XyUH return n; _e'mG'P( } V6k9L*VP ke0W? #59zv= } :wZZ 1qa liTr3T`,V I?"5i8E /* hqBRh+[ **SiteInfoBean.java 8n)Q^z+
K */ J3]m*i5A package NetFox; 4Y!v$r ;w>B}v;RE kD>vQ? public class SiteInfoBean { .phQ7":` >W<5$ .G J0 P private String sSiteURL; //Site's URL PG!vn@b6 private String sFilePath; //Saved File's Path _X[c19q private String sFileName; //Saved File's Name J\V(MN, private int nSplitter; //Count of Splited Downloading File [OcD#~drO riL!]'akV |#wz)=mD public SiteInfoBean() [xPE?OD {//nSplitter的缺省值为5 | QA8"&r //default value of nSplitter is 5 N[-)c,O this("","","",5); Fo#*_y5\ } b ~gF,^w .kIf1-(<U S\A[Z&k0
public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) hd~rC*I { 7L*`nU|h sSiteURL= sURL; 3fPv71NVtt sFilePath = sPath; A=K1T]o sFileName = sName; St`m52V(5X this.nSplitter = nSpiltter; Q)>'fZ) H<;j&\$q yH^*Fp8V
} R 6Em^A/> fm0( RHbwq] public String getSSiteURL() w.f[) { 9YABr>
? return sSiteURL; $b} +5 } #pfosC[ JyO lVs<T 7%"7Rb^@ public void setSSiteURL(String value) sXxO{aeev { 3:Wr)>l}# sSiteURL = value; gwJu&HA/ } I>aa'em Y>~JI;Cu` Q_.Fw\l$` public String getSFilePath() P{18crC[1 { DF2&j! return sFilePath; Ysu/7o4 } 5ov%(QI d}_c( 7w, FA public void setSFilePath(String value) L ]c9 { S)yV51^B sFilePath = value; ]||=<!^kn } 'QF>e Vi WgX. :8rCCop
Uv public String getSFileName() OWsYE? { `@7tWX0 return sFileName; 03@|dN } t;Om9 Z >=Y kqw? X{ public void setSFileName(String value) _+iz?|U { K8Zk{on sFileName = value; %SCu29km } Q%^bA,$&D 6l'y mNoqs&UB public int getNSplitter() ?` i/ { 3:1
c_ return nSplitter; u7WM6X } 4sjr\9IDC Bq_P?Q+\ 1o>R\g3 public void setNSplitter(int nCount) 8[;oUVb5 { (B<AK4G nSplitter = nCount; KTt$Pt/. } 79H+~1Az } (14kR B}+9U uFZB8+ /* x35s6 **Utility.java [dlH
t;S */ .N&}<T[ package NetFox; _9|@nUD 7G/|e24 Ws)X5C=A public class Utility { A'iF'<% 30+l0\1 vfJk?
( public Utility() 4uAafQ`@H {
"B3:m-' f*{;\n(.t Ba|}C(Ws? } i0Q
_f!j Eu.qA9,@U //线程睡眠 @H0%N53nE public static void sleep(int nSecond) #l# [\6 { MmH_gR try{ \N+Ta:U1P Thread.sleep(nSecond); ID# qKFFW } ?^ezEpW catch(Exception e) ^jjJM| a { !r
obau7 e.printStackTrace (); /(ju } O) %kl } [.xk cjC6\.+l3 //日志 oV>AFs6 public static void log(String sMsg) zy6(S_j { a<jE25t System.err.println(sMsg); ^@L
l(? } I7z/GA\x J?quYlS cN}A rv public static void log(int sMsg) jI`To%^Y { Kx185Q'W System.err.println(sMsg); 0nq}SH } p6Dv;@)Yn } Dh(T)yc !riMIl1 f\_!N
"HW /* [j]J_S9jJ **TestMethod.java ec4%Wk2 */ ]!G>8Rc package NetFox; bSR+yr'? _JJKbi _% 9+U[@ public class TestMethod { ) v5n "W 7h9[-d6 4O_+4yS public TestMethod() [S&O-b8A { ///xx/weblogic60b2_win.exe fw v
T2G4 try{ <&s)k SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); eOPCYyN //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); k.xv+^b9Q SiteFileFetch fileFetch = new SiteFileFetch(bean); @*O{*2 fileFetch.start(); yX.5Y|A< } (<R\ catch(Exception e){e.printStackTrace ();} ]n]uN~)9 %>9+1lUhV +bc#GzVF } !QR?\9` a$zm/ 3^R] [; public static void main(String[] args) tZu*Asx7 { `I vw`} L new TestMethod(); Z++Z@J " } 5*wApu{2A } ?WQd 点击下载更多相关资料
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