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/* $d)ca9 **SiteFileFetch.java N.]qU d */ 8qu2iPOcZ package NetFox; }=6'MjF] import java.io.*; IS#FiH import java.net.*; zOqn<Y@ !>e5z|1 }c`fW& public class SiteFileFetch extends Thread { #P?6@\ >9(hUH weE/TW\e SiteInfoBean siteInfoBean = null; //文件信息Bean <Gt2(; long[] nStartPos; //开始位置 o(r\E0I long[] nEndPos; //结束位置 fe_yqIdk FileSplitterFetch[] fileSplitterFetch; //子线程对象 $ n+w$CI) long nFileLength; //文件长度 /~Z?27F6@ boolean bFirst = true; //是否第一次取文件 LK, bO| boolean bStop = false; //停止标志 Pp`*]Ib File tmpFile; //文件下载的临时信息 hDcEGU_ DataOutputStream output; //输出到文件的输出流 vpld*TL* sZL#xZ5
Df //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) fD07VBS yl public SiteFileFetch(SiteInfoBean bean) throws IOException ?F6pEt4 { _',prZ* siteInfoBean = bean; b r^_'1 //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); rZfN+S,g tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info");
mi)LP?q if(tmpFile.exists ()) _-9@qe { ?}RSwl
bFirst = false; ;M_o)OS3 read_nPos(); S`"LV $8 } ]"1`+q6i else I-WhH>9 { &znQ;NH# nStartPos = new long[bean.getNSplitter()]; KA){''>8 nEndPos = new long[bean.getNSplitter()]; E !a|Xp } \yd
s5g!: -x'z
XvWZ 839IRM@'5 'C:>UlzLy } %ix)8+Eb ;3kj2} E2"q3_,, public void run() 1e>s{ { =7C%P%yt //获得文件长度 Qum9A //分割文件 :L1dyVA{ //实例FileSplitterFetch 6q]5Es< //启动FileSplitterFetch线程 -GqT7`:(H4 //等待子线程返回 B:e
@0049 try{ #ceaZn|@m if(bFirst) xZQg'IT { 9$Xu,y nFileLength = getFileSize(); 1\g6)|R-+ if(nFileLength == -1) P#_sg0oJF { 9(5OeH6o? System.err.println("File Length is not known!"); F6K4#t+9 } qnoNT%xazo else if(nFileLength == -2) {.De4]ANh { CMCO}# System.err.println("File is not access!"); |R56ho5C } r4QxoaM else $zyIuJN# { XP1~d>j for(int i=0;i<nStartPos.length;i++) XvE9b5} { e][B7wZ nStartPos = (long)(i*(nFileLength/nStartPos.length)); /,X[k ! } E[*Fz1> for(int i=0;i<nEndPos.length-1;i++) ]6{*^4kX { W3;#fa:[L nEndPos = nStartPos[i+1]; @EDs~ lPv } Nof3F/2 N& nEndPos[nEndPos.length-1] = nFileLength; KGWyJ } 9(L)&S{4K } `8I&7c g=]u^& Oer^Rk //启动子线程 .>mr%#p fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; sp
]zbX? for(int i=0;i<nStartPos.length;i++) .{=$!8|&I9 { [<{Kw=X__2 fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), e+j)~RBnu3 siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), \N4
y< nStartPos,nEndPos,i); i-'9AYyw Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); :OkT? (i fileSplitterFetch.start(); q-`RI*1] } n':! ,a[ // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), Q\WC+,_% siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); Cxcr/9 // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", r} P<iX nEndPos = " + nFileLength); c1_5, 1U' // fileSplitterFetch[nPos.length-1].start(); S_T1y ]a!xUg!S 1|?05<8 //等待子线程结束 !
/NG.Wf //int count = 0; J%jB?2
1:o //是否结束while循环 ~j#]tElb boolean breakWhile = false; :T._ba3| v\,N 5 %rF?dvb;? while(!bStop) {XWZ<OjG { k~/>b~.c write_nPos(); =r.mlc``W Utility.sleep(500); }->.k/vc breakWhile = true; <N`J`J-[ #_|sgS?1 K3' niGT for(int i=0;i<nStartPos.length;i++) rC7``#5 { 2<][%> ' if(!fileSplitterFetch.bDownOver) 9Li%KOY { `iJhG^w9M breakWhile = false; fsEzpUY:{W break; =;3fq- } HoLv`JA } :KKa4=5L if(breakWhile) 3 AHY| break; +R\vgE68 sT/c_^y RC^9HuR& //count++; 5|I[>Su //if(count>4) UDe |Sb // siteStop(); Bcjx>#3?L } /c$\X<b); r&2~~_d3y {w8 NN-n System.err.println("文件下载结束!"); U^.4Hy&D } LT~YFS catch(Exception e){e.printStackTrace ();} Y'u7 IX} } Hh4 n =L5GhA~ `g_"GE //获得文件长度 p)=~% 7DV public long getFileSize() YqV8D&I { 37q@rDm2 int nFileLength = -1; ~+H"
-+ try{ Cv*x2KF
G URL url = new URL(siteInfoBean.getSSiteURL()); 2iU7 0(H HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); VN'Wq7>6 httpConnection.setRequestProperty("User-Agent","NetFox"); ~fa(=.h N6T{ M^7MU}5w int responseCode=httpConnection.getResponseCode(); rFZrYm if(responseCode>=400) ooj~&fu { ?+t1ME| processErrorCode(responseCode); 8LI-gp\ 2 return -2; //-2 represent access is error {Rear2 } `Rdm-[& CAU0)=M oR~e#<$; String sHeader; 97,rE$bC YxGcFjJ Otz E:qe for(int i=1;;i++) KT.?Xp:z { ]=EM@ //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); ;@nFVy>U //Utility.log(in.readLine()); tj*y)28- sHeader=httpConnection.getHeaderFieldKey(i); /?6gdN if(sHeader!=null) M0'
a9.d { E_1="&p if(sHeader.equals("Content-Length")) m3^/:< { {3Y )rY!z nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); ]}mxY
vu_i break; R|P_GN6> } 4<X!<]3] } &6j<c a else erl:9. break; 5 #]4YI; } >|o_wO } e/8z+H^H catch(IOException e){e.printStackTrace ();} /U$8TT8+- catch(Exception e){e.printStackTrace ();} 45@]:2j O3N_\B: C*X
G_b ] Utility.log(nFileLength);
Q2p)7G hKlZi!4J (9 gOtJ return nFileLength; oA
tsUF+a } [Qdq}FYr ir:d'g1k #Y93y\ //保存下载信息(文件指针位置) dp5f7>]:( private void write_nPos() %@R~DBS { XMRNuEU try{ *8ExRQZ$ output = new DataOutputStream(new FileOutputStream(tmpFile)); `*\{.;,]# output.writeInt(nStartPos.length); .9|uQEL for(int i=0;i<nStartPos.length;i++) ue8qIZH { l12$l<x&M // output.writeLong(nPos); (X6sSO output.writeLong(fileSplitterFetch.nStartPos); O!Wd5Y output.writeLong(fileSplitterFetch.nEndPos); .1 QgK } tJ=di5& output.close(); . -"E^f } (shK catch(IOException e){e.printStackTrace ();} ~"!a9GZ catch(Exception e){e.printStackTrace ();} @-#T5? } 3P <'F2o [B0K [rreFSy#@ //读取保存的下载信息(文件指针位置) h7;bclU private void read_nPos() ^*^/]vM { uO >x:*^8 try{ a}d6o;li DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); fMeZ]rb int nCount = input.readInt(); PK&2h,Cu+ nStartPos = new long[nCount]; 0m+8P$)C% nEndPos = new long[nCount]; fj4^VXD for(int i=0;i<nStartPos.length;i++) n~Szf { }~o
ikN: nStartPos = input.readLong(); z8Q"%@ nEndPos = input.readLong(); =f:(r'm?r. } ACV ek input.close(); DI&MC9j( } YCw('i(| catch(IOException e){e.printStackTrace ();} D22Lu;E catch(Exception e){e.printStackTrace ();} q2_`v5t } _a+ICqR ex?\c" "L3Xd][ private void processErrorCode(int nErrorCode) TRKgBK$, { d<@Mdo<;?g System.err.println("Error Code : " + nErrorCode); T+RZ } vN{-?
`ycU-m== ~2/{3m{3 A //停止文件下载 ~F#A
Pt public void siteStop() i~& c| { \~X&o% y bStop = true; "A]Y~iQ for(int i=0;i<nStartPos.length;i++) zfjTQMaxh fileSplitterFetch.splitterStop(); (:Cc3
o A~4p( (3md:r<- } P 4;{jG } A1*4* //负责部分文件的抓取 agaq`^[(P **FileSplitterFetch.java l_v*7d */ 1.SkIu% package NetFox; wk02[ V2yveNz\7 [[qwaI import java.io.*; eO{@@?/y import java.net.*; 67J*&5? | W3LP
~ D{AFL.r{ public class FileSplitterFetch extends Thread { F@hYA z/1hqxHl B4O6>' String sURL; //File URL "E>t,
D long nStartPos; //File Snippet Start Position ):bu;3E long nEndPos; //File Snippet End Position , deUsc int nThreadID; //Thread's ID FD6v/Y boolean bDownOver = false; //Downing is over `Lz1{#F2G boolean bStop = false; //Stop identical n9fk,3 FileAccessI fileAccessI = null; //File Access interface "g
`nsk g8yN%)[ _=6 OP8 public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException ^'B-sz{{ { u3Do~RyL[ this.sURL = sURL; F^'v{@C this.nStartPos = nStart; ?Bu}.0ku-$ this.nEndPos = nEnd; F14(;'Az nThreadID = id; )!C7bTv 4 fileAccessI = new FileAccessI(sName,nStartPos);//定位 <*YO~S(R } ;,0lUcV \n@V-b 9Q@*0- public void run() oP]L5S&A { ogeRYq,g while(nStartPos < nEndPos && !bStop) (/fT]6( { )C}KR`" lcig7% 5OB]x?4] try{ RqGVp?
URL url = new URL(sURL); b5Q8pWZg, HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); +Pw,Nl\KD httpConnection.setRequestProperty("User-Agent","NetFox"); GEtbs+ [ String sProperty = "bytes="+nStartPos+"-"; pAg$oe# httpConnection.setRequestProperty("RANGE",sProperty); d~<QAh#rG Utility.log(sProperty); wsfysat$ /Ri,>}n ] SK[C"
S InputStream input = httpConnection.getInputStream(); 6F`\YSn+ //logResponseHead(httpConnection); n4>cERfa h]P/KVqR. S'?fJ. byte[] b = new byte[1024]; NQ!<f\m4n int nRead; J" bD\% while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) E{gv,cUM { ou;qO
5CT nStartPos += fileAccessI.write(b,0,nRead); hrT%XJl //if(nThreadID == 1) QSmJ`Bm // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); ]-KV0H } @,YlmX} K_##-6> H56
^n<tg Utility.log("Thread " + nThreadID + " is over!"); %uEtQh[ bDownOver = true; .\)k+ R //nPos = fileAccessI.write (b,0,nRead); qsvpW%?aE } 4OEKx|:5n catch(Exception e){e.printStackTrace ();} =43d%N
} A|C_np^z2 } M*H<
n* %|jzEBz@ /=trj5h //打印回应的头信息 1uC;$Aj6: public void logResponseHead(HttpURLConnection con) 1$OVe4H1 { jIZ+d;1 for(int i=1;;i++) bx7\QU+ { K>LpN')d String header=con.getHeaderFieldKey(i); 9ET/I$n if(header!=null) G)~MbesJ //responseHeaders.put(header,httpConnection.getHeaderField(header)); :;_#5 Utility.log(header+" : "+con.getHeaderField(header)); ;ct)H*
y else QmHwn)Ly break;
7&px+155 } Q!x`M4 } /B=l,:TnJ (h|ch# =Pj@g/25u public void splitterStop() lJ'trYaq7 { Ym:{Mm=ud bStop = true; s<d!+< } KJ pj Y.9~Bo<<r PnJ*Zea } mb~./.5F ;'hi9L Lb^(E- /* W'V@ **FileAccess.java >"bnpYSe *//文件访问(定位,写) -+' #*V package NetFox; a!?.F_T9A import java.io.*; K@*rVor{ +Tp%5+E 0&Qsk!-B public class FileAccessI implements Serializable{ UE{,.s $kIo4$.Y$ //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 &8wa ih(| RandomAccessFile oSavedFile; $mD>rx long nPos; ret0z| bz$Qk;m=H H):-!?: public FileAccessI() throws IOException 1N>6rN { `LE^:a:8, this("",0); s{cKBau } 2@4x"F]U; m]1!-`(* N-D(y public FileAccessI(String sName,long nPos) throws IOException Yg$@ Wb6 { {:3.27jQ oSavedFile = new RandomAccessFile(sName,"rw"); l3BD
<PB2S this.nPos = nPos; 2DUr7rM oSavedFile.seek(nPos); [h^f% } C#ZhsWS!b 6{ C Fe|XN [pr 9 $Jr public synchronized int write(byte[] b,int nStart,int nLen) {vLTeIxf.G { tnN'V int n = -1; Tt`L(oF try{ ,7t3>9-M" oSavedFile.write(b,nStart,nLen); ;FcExg|k n = nLen; U%h7h`=F? } 70duk:Ri0 catch(IOException e) qP qy4V.; { Uld_X\;Q4 e.printStackTrace (); 9e-*JYF]C } u>81dO]H xJN |w\& 'N*!>mZ<
return n; 0Y[*lM- } ~Vwk:+): m;1'u;
0GS{F8f~, } y-%nJD$ Xm%iPrl D 2ve
lH; /* ss/h[4h4h **SiteInfoBean.java DgC3>
yL */ 3Ca
\`m)l package NetFox; n}=rj7
vlAO z 4}+xeGA$ public class SiteInfoBean { zjea4>!A2
E!dz/. lj4%(rB= private String sSiteURL; //Site's URL bd,Uz%o_ private String sFilePath; //Saved File's Path ]bs+: private String sFileName; //Saved File's Name ht2
f-EKf{ private int nSplitter; //Count of Splited Downloading File Xg,0 /P~ 7WgIhQ~ n?zbUA# public SiteInfoBean() $Z,i|K; {//nSplitter的缺省值为5 3fm;r5 //default value of nSplitter is 5 '`9%'f) this("","","",5); aB=vu=hF } U)u\1AV5 a#YuKh? $K+4C0wX` public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) Sjw2 j#Q { 1RCXc>}/ sSiteURL= sURL; lr-12-D%- sFilePath = sPath; 2T//%ys= sFileName = sName; L[CU this.nSplitter = nSpiltter; @>M8Pe &/sGh0 oK#\HD4U } K5 5} Wi DLNa6 olYPlHF public String getSSiteURL() ;RNM { caGML|DeI return sSiteURL; c:3@[nF~ }
o G(0i w9G_>+?E f0/jwfL public void setSSiteURL(String value) l. XknF { Fl B, (Cm sSiteURL = value; ;3 G~["DA } $?[1#% p.@0=) uo]Hi^r.l public String getSFilePath() S9$o { jN31\)/i return sFilePath; #S@UTJa
} )`B
-O:: -Pqi1pj] Tg3:VD public void setSFilePath(String value) <I>%m, { =@Q#dDnFu% sFilePath = value; ,Adus M } ]jHgo](% >W>##vK X*TuQ\T public String getSFileName() L{cK^ , { DkDw>Nx<rs return sFileName; 70'}f } Bv2z4D4f+ x?%rx}h rFKo E% public void setSFileName(String value) AeNyZ[40T { v(qV\:s}m sFileName = value; `V]egdO } jf$JaY bHhC56[M ,"P5D&,_ public int getNSplitter() lAdOC5+JX { 4(` 2# return nSplitter; w^ixMn~nLF } k)N2 +/ <bEN8b :'5G_4y)h public void setNSplitter(int nCount) =giM@MV { /Oq1q._9F nSplitter = nCount; hg[l{)Q } *4(/t$)pEl } XX]5T`D DePV,. MILIu;[{#r /* y+K7WUwhq **Utility.java AzHIp^ */ P`\m9"7 package NetFox; S/@dkHI' - XE79 fQ /2g)Z!&+L public class Utility { %k/
k]:s iYO
wB'z 5en
[)3E public Utility() L eG7x7n { r[.zLXgK N oX_? m&Y;/kr } 8CHb~m@^$ .nj?;). //线程睡眠 Rz<d%C;R public static void sleep(int nSecond) /E`l:&89) { l%sp[uqcg try{ {ED(O-W Thread.sleep(nSecond); 5]4<!m } AJ;u&&c4C\ catch(Exception e) ka?IX9t\ { L Q I: ]d e.printStackTrace (); )
xfc-Q } TEaD-mY3 } -4*'WzWr s=^r/Sz902 //日志 u^#4G7< public static void log(String sMsg) 33#7U+~]@ { *_4n2<W$ System.err.println(sMsg); `nd#< w> } 3bg4# c ^D W# /(hP7_]`2 public static void log(int sMsg) bqg]DO$* { /%J&/2Wz System.err.println(sMsg); <
"L){$ } ?)Czl4J } IyG=
7 "oE^R?m D,}'E0 /* $nGbT4sc **TestMethod.java Z,|1G6f@ */ f_re"d 3u package NetFox; 5{R#h : dI#8CO D&z'tf5 public class TestMethod { jm#d7@~4 _SBp66
r H0D>A<Ue public TestMethod() 9Sx<tj_4P{ { ///xx/weblogic60b2_win.exe WTV3p,;6a try{ c-s`>m SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); ADLa.{ //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); qrkRD*a SiteFileFetch fileFetch = new SiteFileFetch(bean); 9I`Mm}v@ fileFetch.start(); Wvut)T } 6mI_Q2 catch(Exception e){e.printStackTrace ();} w+).pcG(* NgE&KPj\ F(KH- } !_XU^A> \pewbu5^ #FQm/Q<0 public static void main(String[] args) )5GdvqA { hSx+{4PZ new TestMethod(); $+lz<~R } 6yu*a_ } )F%wwc^r 点击下载更多相关资料
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