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/* [b/o$zR **SiteFileFetch.java &94W-zh */ xS8,W package NetFox; fu R2S70d import java.io.*; Svw<XJ import java.net.*; I^_NC&m %dW%o{ ! E0!-UpY public class SiteFileFetch extends Thread { ag8`O&+ 3-|3`( +sf .PSz$ SiteInfoBean siteInfoBean = null; //文件信息Bean !^WHZv4 long[] nStartPos; //开始位置 H0>yi[2f long[] nEndPos; //结束位置 f~ZEdq8 FileSplitterFetch[] fileSplitterFetch; //子线程对象 6kR\xP]Kr long nFileLength; //文件长度 SK
R1E];4 boolean bFirst = true; //是否第一次取文件 I[D8""U boolean bStop = false; //停止标志 BzN@gQo File tmpFile; //文件下载的临时信息 |^( M{ DataOutputStream output; //输出到文件的输出流 z9DcnAs x2W#ROfg //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) x[i `S8D public SiteFileFetch(SiteInfoBean bean) throws IOException zzIr2so { ~<)vKk siteInfoBean = bean; 6B6vP%H# //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); |PP.<ce\- tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); h@1!T if(tmpFile.exists ()) VkZ.6kV { =Op+v" bFirst = false; "2{%JFE read_nPos(); I ~$1Lu`~ } P@0Y./Ds else |"]PCb)! { qP1FJ89H nStartPos = new long[bean.getNSplitter()]; Vn|1v4U! nEndPos = new long[bean.getNSplitter()]; I7(?;MpI } nidr\oFUIn Zu/<NC
( +Qj(B@i ;Ii1B{W } QDTNx!WL Kq)MTlP0g ub K7B |p public void run() rv7{Ow_Y { qCPmbg //获得文件长度 %d;ezY '2 //分割文件 Q(Gl{#b //实例FileSplitterFetch nwmW.(R4 //启动FileSplitterFetch线程 *%gF2@=r8F //等待子线程返回 )rm4cW_ try{ igC_)C^i> if(bFirst) c#cx>wq9 { $`J_:H% nFileLength = getFileSize(); #07!-)Gv if(nFileLength == -1) ST dNM\+ { ~Z)/RT/ System.err.println("File Length is not known!"); W|5_$p } Um.qRZ? else if(nFileLength == -2) cg{AMeW { Log|%P\ System.err.println("File is not access!"); sa&) #Z: } 3tAU?sV! else ytAWOt}` { \6!W05[ Q for(int i=0;i<nStartPos.length;i++) y~
rXl { `T&jPA9eY nStartPos = (long)(i*(nFileLength/nStartPos.length)); Jn&7C } @)6jE!LC for(int i=0;i<nEndPos.length-1;i++) pv,45z0 { `[fxyg:u nEndPos = nStartPos[i+1]; .uz|/Zy } =O$M_1lp nEndPos[nEndPos.length-1] = nFileLength; "TOa=Tt{, } ('[TLHP } gm)@c2?. quxdG>8 * ?Jz2[B //启动子线程 ,5Vt]#F5@ fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; jp2Q9Z for(int i=0;i<nStartPos.length;i++) 0<p{BL8 { v6=-g$FG fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), R[B?C;+(O siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), j+IrqPKC^ nStartPos,nEndPos,i); Rl~T$
Ey Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); 60>.ul2 fileSplitterFetch.start(); Z u*K-ep" } X[yNFW}S2W // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), na+d;h*~y siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); F7*wQ{~ // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", 9&]M**X nEndPos = " + nFileLength); \wvg,j= // fileSplitterFetch[nPos.length-1].start(); 0Q5^C!K U9hS<}<Ki OQ&'Dti //等待子线程结束 p
*w$:L //int count = 0; d^E [|w; //是否结束while循环 Vr.Y/3N&' boolean breakWhile = false; iEyeX0nm Cfu=u *u KKe8
ly, while(!bStop) Di.3113t { Xd
`vDgD write_nPos(); TI|/u$SJ<Z Utility.sleep(500); PJ4(}a breakWhile = true; k?GD/$1t iA
}vKQ ?/hZb"6W for(int i=0;i<nStartPos.length;i++) "2ru 7Y" { _HOIT if(!fileSplitterFetch.bDownOver) w f.T3 { J Yb}Zw; breakWhile = false; O[@q%&_ break; pKG<Nvgz& } 3>M&D20Z } /b#l^x:j if(breakWhile) Ta=s:trP break; e.d
#wyeX bpAv1udX-W nk"NmIf //count++; (rtY!<|p //if(count>4) \c,pEXG // siteStop(); DL^o_61 } `_ %S aW_oD[l qy1F*kY System.err.println("文件下载结束!"); &<TzGB* } Hy:V`> catch(Exception e){e.printStackTrace ();} HvwYm.$zE } `mfq
2bVc Fh|#u:n SymwAS+ //获得文件长度 g^Yl TB public long getFileSize() g]~h(mI { CBYX] int nFileLength = -1; PQmq5N6 try{ $lA
V 6I. URL url = new URL(siteInfoBean.getSSiteURL()); Z6C=T;w HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); uQ$^;Pr httpConnection.setRequestProperty("User-Agent","NetFox"); :'L2J B<?[Mrdxw DB526O*
[ int responseCode=httpConnection.getResponseCode(); .R*!aK if(responseCode>=400) .jw}JJ { {]*x*aa\ processErrorCode(responseCode); !`JHH& return -2; //-2 represent access is error aVs(EHF } O43YY2 $q?$]k|M` Wm~` ~P String sHeader; 8F(h*e_? R:-JkV>e: asiov[o; for(int i=1;;i++) P;[OWSR[d { 1F'1>Bu~ //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); <:>SGSE9 //Utility.log(in.readLine()); >I sHeader=httpConnection.getHeaderFieldKey(i); EI>6Nh if(sHeader!=null) %=we`& { 9h90huyKF if(sHeader.equals("Content-Length")) lASL8O&\ { n]_[NR) i nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); 7M_U2cd|TD break; gbeghLP[? } sxKf&p; } ?^mi3VM else 5<pftTcZ break; kv,%(en] } D-Vai#Cd } AE`We$! catch(IOException e){e.printStackTrace ();} >KLtY|o) catch(Exception e){e.printStackTrace ();} AUVgPXOwd o;a:Dd 6Tw#^;q- Utility.log(nFileLength); %
}|cb7l yH 9!GS#
XIo55* return nFileLength; enNiI$H]`_ } m"\:o .o1^Oh B&+`)E{KB //保存下载信息(文件指针位置) aJL^AG private void write_nPos() AsS$C&^ { =p^He! try{ n~V4nj&_T output = new DataOutputStream(new FileOutputStream(tmpFile)); 1(zsOeX output.writeInt(nStartPos.length); v8gdU7Ll, for(int i=0;i<nStartPos.length;i++) )Au6Nf
{ "vCM}F // output.writeLong(nPos); GuZ( &G6* output.writeLong(fileSplitterFetch.nStartPos); 4H5pr output.writeLong(fileSplitterFetch.nEndPos); /&& 2u7* } U-k+9f 0 output.close(); UX3BeUi.) } b*;"q9u5 catch(IOException e){e.printStackTrace ();} 2$_9cF Wm catch(Exception e){e.printStackTrace ();} XoLJ L]+? } [ xOzzp4 9`jcC-;iv fJ\sguZ //读取保存的下载信息(文件指针位置) k%wn0Erd private void read_nPos() Xtz-\v#0o' { IKtB; try{ s]T""-He DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); n?\ nn3 int nCount = input.readInt(); `nKH"TaX nStartPos = new long[nCount]; ""Zp:8o nEndPos = new long[nCount]; ^JZ^>E~ for(int i=0;i<nStartPos.length;i++) i&njqK!wS { >-_d CNZ nStartPos = input.readLong(); L@75-T nEndPos = input.readLong(); G$'jEa<:u } ri`R<l8 input.close(); _LAS~x7, } HkV1sT catch(IOException e){e.printStackTrace ();} A7!g catch(Exception e){e.printStackTrace ();} #po5_dE\* } lf>*Y.!@me {mWui9 %M }>^Q'BW;65 private void processErrorCode(int nErrorCode) 4L-:*b_v\ { R(P%Csbqh System.err.println("Error Code : " + nErrorCode); )&era` e[ } Uie?9&3 R1F5-#?'E
{7!UQrm< //停止文件下载 /vY_Y3k# public void siteStop() !3mA0-!+ { fP3_d bStop = true; 9_\'LJ for(int i=0;i<nStartPos.length;i++) ;fw1 fileSplitterFetch.splitterStop(); ky
8e p oLWJm j-CnT)W< } Ngr/QL]Q } %}86D[PF //负责部分文件的抓取 M
:3u@06a **FileSplitterFetch.java fgNU03jp^x */ K.G$]H package NetFox; J};z85B 2<&Bw2 vA$o~?a]/ import java.io.*; 7'wS\/e4a import java.net.*; ]M)O YY 1)}=bhT k>dsw : public class FileSplitterFetch extends Thread { bX.ja;; $^&ig [Q\GxX. String sURL; //File URL kc7lc|'z long nStartPos; //File Snippet Start Position Oz|K8p long nEndPos; //File Snippet End Position 79\JxiSB int nThreadID; //Thread's ID ?JV|dM boolean bDownOver = false; //Downing is over 6"c1;P!4 boolean bStop = false; //Stop identical V{|}}b?w? FileAccessI fileAccessI = null; //File Access interface x^"ES%* Ladsw Xtwun public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException kc/{[ME { }M1sksk5 this.sURL = sURL; ZEYgK)^ this.nStartPos = nStart; t_ksvWUo this.nEndPos = nEnd; _k^0m nThreadID = id; %/>xO3"T fileAccessI = new FileAccessI(sName,nStartPos);//定位 X2tk[Kr } "<}&GcJbz J 5h+s-' A2}Rl%+X]6 public void run() MNH1D!} { }HE6aF62O while(nStartPos < nEndPos && !bStop) sC[yI Up { y9#$O(G y=Mq(c:'UN jCTAKaq try{ +0),xu URL url = new URL(sURL); 0l;<5 HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); H+
h07\?
% httpConnection.setRequestProperty("User-Agent","NetFox"); R<i38/ ~G String sProperty = "bytes="+nStartPos+"-"; 9 Pw0m=4 httpConnection.setRequestProperty("RANGE",sProperty); 1 T130L Utility.log(sProperty); T[=S$n-' gyS+9)gY <p;k)S2J InputStream input = httpConnection.getInputStream();
E7Cy(LO //logResponseHead(httpConnection); +UJuB SWp1|.=Sm zqDR7+] byte[] b = new byte[1024]; +GsWTEz int nRead; jGrN\D?h while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) X0-IRJ[ { dD<fn9t
nStartPos += fileAccessI.write(b,0,nRead); lnE+Au' //if(nThreadID == 1) ]|_\xO( // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); e!fqXVEVR } 65ly2gl ;n\= R 5. [i0Hm)Bd3 Utility.log("Thread " + nThreadID + " is over!"); TpA\9N#$ bDownOver = true; fQLt=Lrp //nPos = fileAccessI.write (b,0,nRead); qyHZ M}/ } (Qgde6 catch(Exception e){e.printStackTrace ();} 2xw6 5z } smG>sEp2 } S osj$9E KJE[+R H+z IlX$YOf4 //打印回应的头信息 O4<g%.HC6 public void logResponseHead(HttpURLConnection con) a?yMHb{F { Z ,^9Z for(int i=1;;i++) ^IKO2Ft { {brMqE>P# String header=con.getHeaderFieldKey(i); kj+#TnF- if(header!=null) &rDM<pO #- //responseHeaders.put(header,httpConnection.getHeaderField(header)); :b[`
v Utility.log(header+" : "+con.getHeaderField(header)); }HEvr)v9 else `si#aU break; `V[!@b: } iut`7 } ,Ma.V\T[ Y32O-I!9u bslrqUk_`= public void splitterStop() -/]W+[ { t>B^q3\q? bStop = true; rQTr8DYH } Ax oD8| M5T9JWbN mVtXcP4b } ?=GXqbS" 8+mH:O ;X ,1I /* ]4+s$rG **FileAccess.java tweY'x.{ *//文件访问(定位,写) )'l*Tl package NetFox; Khh0*S8.K import java.io.*; $4jell _ >`X]I; tU"raP^= public class FileAccessI implements Serializable{ bbxLBD' rzp +: //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 UR(-q RandomAccessFile oSavedFile; W~_t~Vg5 long nPos; 5q@LxDy,b 7j5f ;O^+ 3cj3u4y public FileAccessI() throws IOException K!D
o8| { \yrisp#` this("",0); hO{cvHy` } > Oh?%%6 P)dL?vkK #6Xs.*b5C public FileAccessI(String sName,long nPos) throws IOException &iN--~}!$ { xr0haN\p" oSavedFile = new RandomAccessFile(sName,"rw"); *zO&N^X.4 this.nPos = nPos; ck#"*], oSavedFile.seek(nPos); L]a`"CH:a$ } VC5_v62&. wwKh CmH _DRrznaw public synchronized int write(byte[] b,int nStart,int nLen) BiE08,nj { >#+IaKL7 int n = -1; Y}6n]n;uR try{ }awzO# oSavedFile.write(b,nStart,nLen);
4eVI}, n = nLen; -#-p1^v} } D j\e@?Y catch(IOException e) n{*e 9Aw { nZR!*$}A e.printStackTrace (); v;{{ y- } 7iuQ9q^& w^K^I_2ge wLuv6\E return n; CeT~p6= } mq /zTm fpM#XFj 4VN aq<8 } l? #xAZx&_ .AV)'j#6P /E wGW /* {>0V[c[~ **SiteInfoBean.java 0f ER*.F */ t?;T3k[RM package NetFox; %Qn(rA@9 "a1O01n 7#;vG>] public class SiteInfoBean { HOt>}x EjEFg#q <<MjC5 private String sSiteURL; //Site's URL ]O:M$ $ private String sFilePath; //Saved File's Path NGjdG=, private String sFileName; //Saved File's Name jW*1E*"
private int nSplitter; //Count of Splited Downloading File B1N)9% l#3($QV, s(ROgCO public SiteInfoBean() $awi>#[ {//nSplitter的缺省值为5 zIQzmvf //default value of nSplitter is 5 :lcea6iO this("","","",5); 9T2xU3UyY } 4C~UcGMv\ B%<e FFV\ kL@Wb/K JP public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) 'p)Q68;& { KB{RU'?f| sSiteURL= sURL; vnX sFilePath = sPath; x_@i(oQ:_ sFileName = sName; y_F}s9wj this.nSplitter = nSpiltter; %@&a7JOL OQ_stE2i Mjpo1dw } OVoO6F] fF?6j + R$?2 public String getSSiteURL() w=r&?{ { t7#lsd`_ return sSiteURL; ,W5.:0Y;f[ } ?s}
% vfvlB[ 5#:pT public void setSSiteURL(String value) lHBI { Dxx;v .$ sSiteURL = value; ru.5fQU } )&NAs
t\U$8l_; (4~WWU (iT public String getSFilePath() {'3D1#SK { +KK$0pL return sFilePath; >POO-8Q } X\GM/A g%J./F=@3 sn\;bq public void setSFilePath(String value) u,i]a#K { wuK=6RL sFilePath = value; I{.HO<$7D} } " mj^+u- m$UvFP1>u1 ~2%3FV^ public String getSFileName() i3V/`)iz { o 5Zyh26 return sFileName; [$:,-Q @ } MB$a82bY 3_ 2hC!u!K w[fDk1H) public void setSFileName(String value) :uCdq`SaQl { G\Hq/4 sFileName = value; ;i)KHj' } 2/Nq' -Q[g/% =:$) Z public int getNSplitter() _,;%mK { hYt7kq!" return nSplitter; 9 pKm*n& } X B I;Lg ")\aJ8 H:}}t]E public void setNSplitter(int nCount) DnyYMe!r { @@pq'iRn nSplitter = nCount; q(9%^cV6 } xEoip?O?7F } r#h {$iW p]f&mBO* 9`X&,S~e /* N=fz/CD)I **Utility.java Bhuw(KeB */ 8]*Q79 package NetFox; |$w*RI0C Z.jCera. |'w^ n public class Utility { b~wKF0vq 'C]jwxy (KF7zP public Utility() c cr" ep { zGs|DB /Dd\PjIH{ &+;uZ-x } cIZc:
JLW$+62 //线程睡眠 Q_lu`F| public static void sleep(int nSecond) EVz9WY { S:97B\u`
try{ &-F"+v,+ Thread.sleep(nSecond); kkfCAM } RjtC:H&XZ catch(Exception e) -N^=@Yx) { Yf(im e.printStackTrace (); D0M!"c>\ } GVp } O]_={% &wGg6$ //日志 rt;gC[3\ public static void log(String sMsg) b+$o4l/x { F?2FITi_V System.err.println(sMsg); qRUCnCZs } eiB(VOJ Ar~{= X 32KR--mn% public static void log(int sMsg) 9S"N4c> { ,?w!5N;iRO System.err.println(sMsg); _h~p:= } {d}26 $<$] } N l|^o{# MgP{W=h2 p2a?9R /* a@k.$ **TestMethod.java 2VMX:&3 5J */ P%jkKE?B4 package NetFox; [Yoa"K 3GINv3_ x 8M#t(hw public class TestMethod { `vH&K{ 'Z$jBL }wG|%Y#+r public TestMethod() scmto cm { ///xx/weblogic60b2_win.exe 3DI^y`av try{ aKOf;^@ SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); C&oxi$J:p+ //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); ZpTi:3> SiteFileFetch fileFetch = new SiteFileFetch(bean); 3Pa3f >}- fileFetch.start(); f-s~Q4 } kI]=&Rw catch(Exception e){e.printStackTrace ();} {"}+V`O{ z=%IcSx; &08Tns" } *|CLO|B) y8D 8Y8B >+f'!*%7He public static void main(String[] args) F]Pul|.l { nYgx9Q"<om new TestMethod(); &}O8w77 } FBbm4NB } &BTfDsxAK 点击下载更多相关资料
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