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/* E':y3T@." **SiteFileFetch.java 0'c<EJ */ ,R3D package NetFox; ,t(y~Z
wJ import java.io.*; rQ@,Y" import java.net.*; |o|0qG@g ,r:.
3. ([`-*Hy public class SiteFileFetch extends Thread { `"Tx%>E(U 3,S5>~R= `{ou4H\ SiteInfoBean siteInfoBean = null; //文件信息Bean \[+ZKj: long[] nStartPos; //开始位置 +twJHf_U long[] nEndPos; //结束位置 'hg, W] FileSplitterFetch[] fileSplitterFetch; //子线程对象 <b{Le{QJ* long nFileLength; //文件长度 }m\ boolean bFirst = true; //是否第一次取文件 a:H}c9$% boolean bStop = false; //停止标志 JY_+p9KfyQ File tmpFile; //文件下载的临时信息 T[~ak"M DataOutputStream output; //输出到文件的输出流 ].7)^ \E]s]ft;+ //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) +.b~2K1 public SiteFileFetch(SiteInfoBean bean) throws IOException gj$gqO`B { PHT;%;m= siteInfoBean = bean; !@p@u;djJ //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); [ wr0TbtV tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); Xp4pN{h e if(tmpFile.exists ()) rqT@i(i { #eR*|W7o bFirst = false; _lu.@IX- read_nPos(); 8&3+=<U } CIYTs,u# else kplyZ { +8mfq\Y1 nStartPos = new long[bean.getNSplitter()]; )u(`s `zd nEndPos = new long[bean.getNSplitter()]; HVh+Zk } mY
|$=n5X zA\DI]:+ %(,JBa:G Z\4l+.R` } E.}T.St 6*tI~ M5[AA/@ public void run() "72
_Sw { ^#vWdOlt //获得文件长度 C(xdiQJh //分割文件 Qm^N}>e //实例FileSplitterFetch ERCW5b[RT //启动FileSplitterFetch线程 lHT? //等待子线程返回 li$(oA2 try{ G'#a&6 if(bFirst) CQ"5bnR { drNfFx2 nFileLength = getFileSize(); [gqV}Y"Md if(nFileLength == -1) oju4.1 { P0 hC4Sxf System.err.println("File Length is not known!"); GyRU/0'BME } ZMy,<wk else if(nFileLength == -2) 7o'kdYJzo { G0xk @SE System.err.println("File is not access!"); FgKDk!ci } p/4GOU5g else u2@:[:Ao { 1`X{$mxw for(int i=0;i<nStartPos.length;i++) OqHD=D[ { {6 C!^ 5 nStartPos = (long)(i*(nFileLength/nStartPos.length)); _LCK|H%v' } BQ2DQ7q for(int i=0;i<nEndPos.length-1;i++) w)5eD+n\- { &,3.V+Sz nEndPos = nStartPos[i+1]; |r%6;8A]i } zxT&K| nEndPos[nEndPos.length-1] = nFileLength; u\Tq5PYXt } SHIK=&\~- } e#<%`\qH ikw_t? ./rNq!*a //启动子线程 :>\ i fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; m';:): for(int i=0;i<nStartPos.length;i++) @'7'3+ c { T%VC$u4F fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), C8e{9CF siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), CRw.UC\ nStartPos,nEndPos,i); 6zaO$ Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); TO-[6Pq# fileSplitterFetch.start(); z|<6y~5, } wS hsu_(i // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), Fnzv& siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); L:}hZf{p* // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", (w6 024~ nEndPos = " + nFileLength); 6Y`eYp5A // fileSplitterFetch[nPos.length-1].start(); mXAX%M U ;Ze}i/l OLXG0@ //等待子线程结束 ,1a6u3f, //int count = 0; K\,)9:`t //是否结束while循环 dE%rQE7' boolean breakWhile = false; o vvR{MTc +YI/(ko= zw_Xh~4"b while(!bStop) zr-HL:js { 6H53FMqr write_nPos(); }[ld=9p( Utility.sleep(500); {M )Y6\v breakWhile = true; a[1^)=/DM L(fOe3
v g\,pZ]0i for(int i=0;i<nStartPos.length;i++) >h(n8wTP { N!
}p if(!fileSplitterFetch.bDownOver) C-V,3}=*2 { 7b_t%G" breakWhile = false; Wj(O_2
break; @aAB#, } bzF>Efza } X6)-1.T& if(breakWhile) ;%0$3a break; x&@. [FJhO zgI!S6q 1I{vBeMj //count++; |Rd?s0u //if(count>4) _)"-zbh}{ // siteStop(); SDwTGQ/0 } yT.h[yv"w -Wd2FD^x ;}@.E@s%' System.err.println("文件下载结束!");
{^a"T'+ } FAX|.!US*p catch(Exception e){e.printStackTrace ();} sf<S#;aYqn } MX2]Q lA<n}N)j ; :4&nJ*qG //获得文件长度 P<ElH3J` public long getFileSize() ]bLI!2Kr { u!hY
bCB int nFileLength = -1; 1hp`.!3]H try{ ?#YheML? URL url = new URL(siteInfoBean.getSSiteURL()); :PE{2* HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); Tvqq# ;I httpConnection.setRequestProperty("User-Agent","NetFox"); WYSqnmi BiT
#bg @.0>gmY;: int responseCode=httpConnection.getResponseCode(); Fku~'30 if(responseCode>=400) eyUguA<lK\ { N?hQ53#3 processErrorCode(responseCode); -d1 YG[1| return -2; //-2 represent access is error zl^ %x1G } dWqKt0uh! ?<)4_ ~_8Dv<"a String sHeader; #I8)|p?P ZP~Mgz{f X'Q?Mh for(int i=1;;i++) 3`.*~qW { c<bV3, //DataInputStream in = new DataInputStream(httpConnection.getInputStream ());
U*(/eEtd- //Utility.log(in.readLine()); uatY:GSR sHeader=httpConnection.getHeaderFieldKey(i); v3PtiKS if(sHeader!=null) BbsgZ4 { ;-sZaU; if(sHeader.equals("Content-Length")) FjR/_GPo6 { MdXOH$ps nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); !IF]P# break; C@d*t? } DcYL8u } .8e]-^Z else ])OrSsV} break; P1C{G'cR } /S2lA> } (KxI* catch(IOException e){e.printStackTrace ();} C# zYZ JZ catch(Exception e){e.printStackTrace ();} 1Xzgm0OS; QTr)r;Tro mv] . Utility.log(nFileLength); -UY5T@as IUf&*'_ uPCzs$R return nFileLength; V6Z~#=EQ } $~7uDq ^/]w}C#:d M^IEu} //保存下载信息(文件指针位置) }uP`=T!"8 private void write_nPos() $ix:S$ { YYNh|
2 try{ q8A ;%.ZLG output = new DataOutputStream(new FileOutputStream(tmpFile)); f euATL] output.writeInt(nStartPos.length); }aO6% for(int i=0;i<nStartPos.length;i++) 8u8-:c%{ { O|K-UTWH% // output.writeLong(nPos); MrjgV+P}[ output.writeLong(fileSplitterFetch.nStartPos); &3gC&b^i output.writeLong(fileSplitterFetch.nEndPos); CWT#1L= } _D+pJ{@W output.close(); gy5 ^JL } )j,Y(V$P catch(IOException e){e.printStackTrace ();} Fi+8| /5 catch(Exception e){e.printStackTrace ();} ^AhV1rBB } ~:FF"T> (A(j.[4a s.|OdC>U = //读取保存的下载信息(文件指针位置) C)UL{n private void read_nPos() OSoIH`tA { LV2#w_^I try{ >0F)^W? DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); ncGt-l<9 int nCount = input.readInt(); R7\T.;8+ nStartPos = new long[nCount]; Cv[_N%3[ nEndPos = new long[nCount]; hgg8r#4q for(int i=0;i<nStartPos.length;i++) OQ(w]G0LP { B]2m(0Y>>v nStartPos = input.readLong(); H 48YX(HI nEndPos = input.readLong(); i~3\jD=< } ^4/
input.close(); !$u:[T_8 } )J^5?A catch(IOException e){e.printStackTrace ();} ,V^2Oa catch(Exception e){e.printStackTrace ();} 1X5MknA } :$6mS[@| Mmmg3%G1 lA{JpH_Y8s private void processErrorCode(int nErrorCode) h;Hg/jv { B4@1WZn<8 System.err.println("Error Code : " + nErrorCode); e&@;hDmIX } L"KKW
c knfEbH <-6f}wN //停止文件下载 %$Dn);6= public void siteStop() nsL"'iQ { b>h
L*9 bStop = true; *{:Zdg'~E for(int i=0;i<nStartPos.length;i++) E3hXs6P fileSplitterFetch.splitterStop(); ~P7zg!p/q _V`F_C\\# HPMj+xH } *iX PG9XZ } 4A0v>G`E*# //负责部分文件的抓取 o 9rZ&Q< **FileSplitterFetch.java sU(<L0 */ a B$x(8pP@ package NetFox; DD5cUlOSu VUon>XQ
G Qz4eQlWhp import java.io.*; iE0x7x P_ import java.net.*; 'yo-`nNFD $^e(?Pq WA6reZ public class FileSplitterFetch extends Thread { |.z4 VJi4 {uDH-b(R qTrM*/m:]L String sURL; //File URL 8-_atL long nStartPos; //File Snippet Start Position .],:pL9d long nEndPos; //File Snippet End Position *Sg6VGP int nThreadID; //Thread's ID ){LU>MW{& boolean bDownOver = false; //Downing is over HvR5-?qQ boolean bStop = false; //Stop identical XuoyB{U FileAccessI fileAccessI = null; //File Access interface (gRTSd T? mEmgr(W Cxd^i public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException h,\5C/ { aX,6y1 this.sURL = sURL; KV 8Ok this.nStartPos = nStart; 5O(U1
* this.nEndPos = nEnd; %I=/
y nThreadID = id; wRdN(`;v fileAccessI = new FileAccessI(sName,nStartPos);//定位 EK.n
$ } EfB.K}b^ \9fJ)*- eZ]>;5 public void run() j[Jwa*GQP { :HM~!7e while(nStartPos < nEndPos && !bStop) .6!cHL3ln { bt* 2]y Hxo/6 \[G"/]J try{ ;qO3m-(d URL url = new URL(sURL); Kv)Kn8df HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); f?r{Q httpConnection.setRequestProperty("User-Agent","NetFox"); AJ>$`= String sProperty = "bytes="+nStartPos+"-"; ]VR79l httpConnection.setRequestProperty("RANGE",sProperty); Wf3{z
D~ Utility.log(sProperty); #_Zkke~{ QFK'r\3pU p//mVH% InputStream input = httpConnection.getInputStream(); Mtl`A'KQ/K //logResponseHead(httpConnection); AC\y|X8- o5['5?i} / ;eJ|)* byte[] b = new byte[1024]; :%gM
Xsb int nRead; $ y(Qdb while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) K5RgWP { ]s0GAp" nStartPos += fileAccessI.write(b,0,nRead); D9 Mst6 //if(nThreadID == 1) ~W-l|-eogz // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); f%3MDI } /2''EF'; 1,Es' 'C=(?H)M Utility.log("Thread " + nThreadID + " is over!"); L=<$^ m bDownOver = true; U'^ G-@ //nPos = fileAccessI.write (b,0,nRead); l,9rd[ } Ng1bjq}E2 catch(Exception e){e.printStackTrace ();} TS`m&N{i") } @EURp } *kTj,&x[ g*Pn_Yo[. EL%P v1 //打印回应的头信息 j<QK1d17 public void logResponseHead(HttpURLConnection con) t%%zuq F` { 6-~ZOMlV for(int i=1;;i++) G)?j(El
{ <00nu'Ex1v String header=con.getHeaderFieldKey(i); \x<,Ma=D if(header!=null) QL @SE@" //responseHeaders.put(header,httpConnection.getHeaderField(header)); &lID6{7 9Z Utility.log(header+" : "+con.getHeaderField(header)); g##<d(e!} else nXk9
IG( break; ~]24">VZf } \irKM8]LJ } gil:SUW1r ecx_&J@D /3.;sS]B public void splitterStop() He$v'87] { )Y&B63]B bStop = true; RD0*]4>] } KMG}VG
0}YadNb7 +U<.MVOo. } belBdxa{" LN)yQ- ~c55LlO> /* ~Y{]yBGoF **FileAccess.java Lr20xm *//文件访问(定位,写) 8QMMKOui\ package NetFox; <Qr*!-Kc6 import java.io.*; elR1NhB|p -]-0]*oAp @=}NMoNH public class FileAccessI implements Serializable{ fT{jD_Q+3 ^Y!$WP //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 H]*B5Jv~ RandomAccessFile oSavedFile; oGyoU#z# long nPos; }8ESp3~e_ _+)n}Se mKE'l'9A_ public FileAccessI() throws IOException oKr= ]p { EiP N44( this("",0); ]T(qk } oCLM'\ <(~Wg{ vXZP> public FileAccessI(String sName,long nPos) throws IOException ?%%vQ? { 3g:P>( oSavedFile = new RandomAccessFile(sName,"rw"); SmRFxqtN this.nPos = nPos; unRFcjEa oSavedFile.seek(nPos); J7`;l6+Gb } 4uh~@ Lv <IBUl}|\ ,Y#f0 public synchronized int write(byte[] b,int nStart,int nLen) UV</Nx)3 { APJFy@l} int n = -1; t'yh&44_ try{ 7*%}=. oSavedFile.write(b,nStart,nLen); _{
2`sL) n = nLen; kyZZ0 } |MN2v[y catch(IOException e) qG2P?D R {
z).&0K e.printStackTrace (); fh66Gn, } 4#t=%} AFeFH.G6Jr o.Bbb=*rZ return n; D(&Zq7]n } t8; nP[` rWqr-"0S. Z#l6BXK } .Iz
JJp (LMT ' 4N1)+W8k* /*
;5 **SiteInfoBean.java :T>OJ"p */ i7rk%q package NetFox; n<@C'\j@ #Uep|A 1(_[awBx public class SiteInfoBean { Su[(IMw E$A=*-u @7;}6,) private String sSiteURL; //Site's URL Q'hs,t1< private String sFilePath; //Saved File's Path &os:h]
C private String sFileName; //Saved File's Name 5|`./+Ghk private int nSplitter; //Count of Splited Downloading File pV!WZUfg 2|(lKFkQ "\]]?& public SiteInfoBean() knfmJUT {//nSplitter的缺省值为5 |oePB<N //default value of nSplitter is 5 RE-y5.kE^ this("","","",5); K|Xe) } -s7!:MB%g U-$nwji #;+SAoN
public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) !w0=&/Y{R { U7e2NES sSiteURL= sURL; 'Q=(1a11 sFilePath = sPath; b/\l\\$- sFileName = sName; 3<[q>7X this.nSplitter = nSpiltter; }AiF 7N0 'geN
dx /%F,
} c+O:n:L I]pz3!On4, tO D}& public String getSSiteURL() fQ-IM/z { *+00 return sSiteURL; oMYZ^b^ } ixoN#'y<" 7{k?"NF SL\15`[{ public void setSSiteURL(String value) fP8bWZ{ { C*11?B[ sSiteURL = value; '$z@40u } i[z#5;x+< U'Y,T$Q 0Pt%(^ public String getSFilePath() (h[.
Ie { cK\?wZ| Y return sFilePath; e5"5 U7 } H|MAbx
7 [A]
+Azc t1$pl6&, public void setSFilePath(String value) NSR][h_ { jfam/LL{V sFilePath = value; Adfnd } r;>.*60AT hM=X#
; ER}5`*X{ public String getSFileName() %WX^']p { Id>I.e4 return sFileName; ;
0M"T[c } >66
`hZ znIS2{p/` )wdd"*hv public void setSFileName(String value) 5)0'$Xxqa0 { 3a}c'$F>_' sFileName = value; !\OX}kHX5 } *_HF %JYMZ # $'H?lO QBfo=9[=e public int getNSplitter() /#q6.du { FJ{&R Ld return nSplitter; hx4c`fOs } X+N8r^& k@gQY _ EN8xn9M? public void setNSplitter(int nCount) D^U?!S&4~ { U]9k,# nSplitter = nCount; WZP1g kX&M } b?,=|H } KYl!Iw67d [8Z
!dj Ht]O:io` /* 5v=e(Ph+ **Utility.java [F{P0({%? */ e nw*[D ! package NetFox; g+(Y)9h& &^Gp F%O+w;J4 public class Utility { <,U$Y> mHH>qW{` .*J /F$ public Utility() f9)0OHa { a(G}< `lt[Q>Z : JSuC } kE[R9RS! ,pVe@ d' //线程睡眠 $H&:R&Us public static void sleep(int nSecond) A!}Ps"Z { i|28:FJA try{ fP$rOJ)P Thread.sleep(nSecond); "g!ek3w( } }'n]C| gZ catch(Exception e) FC]n?1?<( { 8==_43 e.printStackTrace (); F6>oGmLy } 0Fsa&<{6? } 9o3? k-)Ls~#+ //日志 2h)Qz+|7 public static void log(String sMsg) Y_~otoSoY { (Ap?ixrR_ System.err.println(sMsg); )#`&[9d- } bU/YU0ZIT 'T;;-M3* h
R6Pj"@0 public static void log(int sMsg) e_cK#9+ { BKgCuz:y System.err.println(sMsg); D6C h6i5$ } I8YCXh } .nEiYS|T k)W&ZY Q8.LlE999 /* POX{;[SV **TestMethod.java 4Tb"+Y} */ wti package NetFox; >5D;uTy
u 2(Aw GR_caP public class TestMethod { n9-WZsc1 @Y}G,i $R:Q R? public TestMethod() u1\r:q { ///xx/weblogic60b2_win.exe H5o=nWQ6e try{ QV4FA&f& SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); 4=N(@mS //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); Yb1Q6[! SiteFileFetch fileFetch = new SiteFileFetch(bean); a>Zp?*9 fileFetch.start(); sk
AF6n } {i}E)Np catch(Exception e){e.printStackTrace ();} k+Z2)j" !/=.~B g}L>k}I?!W } ntW1 )H'o S,Tc\} Aq\K N. public static void main(String[] args) Ch:EL-L { MV07RjeS new TestMethod(); G&"O)$h } t+{vbS0 } '|<S`,'#hg 点击下载更多相关资料
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