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/* `eF&|3!IYQ **SiteFileFetch.java F)W7,^=X>- */ VUo7Evc:.P package NetFox; _o
2pyV& import java.io.*; kiW|h)w_,v import java.net.*; v-V#?+# tP?pN]Q$, "1<>c/h public class SiteFileFetch extends Thread { <`B4+:;w6 |Ew~3-u! %[x oA)0! SiteInfoBean siteInfoBean = null; //文件信息Bean d:U2b"k=/u long[] nStartPos; //开始位置 V!sT2 long[] nEndPos; //结束位置 K%XQdMv FileSplitterFetch[] fileSplitterFetch; //子线程对象 RS$!TTeQ long nFileLength; //文件长度 9^;)~ G boolean bFirst = true; //是否第一次取文件 ^[7ZB mS boolean bStop = false; //停止标志 ^x! N] File tmpFile; //文件下载的临时信息 jkPye{j DataOutputStream output; //输出到文件的输出流 Q\P?[i] @E(_H$|E //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) 5$v,%~$Xds public SiteFileFetch(SiteInfoBean bean) throws IOException @AXRKYQ{t { peA}/Jc siteInfoBean = bean; E@/yg(?d= //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); Pl@3=s!~>~ tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); (BB&ZUdyv if(tmpFile.exists ()) ~f.fg@v`+v { B1EI'<S bFirst = false; DrG9Kky{ read_nPos(); (XQBBt } igoXMsifT+ else Ft7{P.g { x1gf o!BN nStartPos = new long[bean.getNSplitter()]; (&25 8i, nEndPos = new long[bean.getNSplitter()]; 0@FZQ$- } ewo1^> Cr!}qZq FC' v= * g UfLw } nLA8Hy"8z `
>w4G|{ h";0i: public void run() i2a""zac { D{Zjo)&tF' //获得文件长度 0Zt=1Tv //分割文件 >S3,_@C //实例FileSplitterFetch )1PZ# //启动FileSplitterFetch线程 X3C"A|HE9 //等待子线程返回 j k%MP6 try{ j{.P'5e@pZ if(bFirst) 2wHvHH! { J>I.|@W4 nFileLength = getFileSize(); C q/936`O if(nFileLength == -1) Q7 dXTS4H { [k"@n+% System.err.println("File Length is not known!"); -~nU&$ccL } Hs%;uyI@$ else if(nFileLength == -2) jTo-xP{lC { {uurM`f}: System.err.println("File is not access!"); P1<Y7+n } (*.t~6c?5 else Kt(Z&@ { :UjF<V for(int i=0;i<nStartPos.length;i++) 8"d0Su4r { C~16Jj:v nStartPos = (long)(i*(nFileLength/nStartPos.length)); =%p%+F@RlW } 9#:b+Amzz for(int i=0;i<nEndPos.length-1;i++) !xU1[,9 { ;TaR1e0 nEndPos = nStartPos[i+1]; N;<.::x } yfBVy8Sm nEndPos[nEndPos.length-1] = nFileLength; \DP*?D_}? } Z9:erKT } )2@_V % %J*z!Fe8s 6} DGEHc1 //启动子线程 CM}1:o<<N fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; >s@*S9cj: for(int i=0;i<nStartPos.length;i++) pEc|h*p8 { 8PWx>}XPt fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), ?tWcx;h:> siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), <A"T_Rk nStartPos,nEndPos,i); >^cP]gGY Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); %SV5PO@ fileSplitterFetch.start(); A!([k}@=j } CNC3">Dk~9 // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), {-(}p+;z siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); +*dG'U6 // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", MXSN
< nEndPos = " + nFileLength); W/(D"[:l% // fileSplitterFetch[nPos.length-1].start(); 3Un{Q~6h [dm&I#m= <kQ
5sG //等待子线程结束 rJ
LlDKP-( //int count = 0; #cG7h(! //是否结束while循环 XcoV27 boolean breakWhile = false; U@W3x@ zEG6T * ]0`*gKA while(!bStop) [dG&"%5vD { Y\7>>? write_nPos(); w2-:!,X Utility.sleep(500); <ptgFR+ breakWhile = true; j2V"w&>b} gy|L!_1Z8 ^;";fr
Vw for(int i=0;i<nStartPos.length;i++) 4)L(41h
{ oCE=!75 if(!fileSplitterFetch.bDownOver) Vy]y73~ { Vej [wY-c breakWhile = false; pwg$% lv break; #cB=](N } VO_! + } !.(Kpcrg if(breakWhile) uSZCJ#'G break; dP>~ExYtm 6S#Y$2
P ^
olaq(z //count++; N=1zhI:VaQ //if(count>4) AJk0jh\.j% // siteStop(); P5u
Y1( } dGxk
ql r)ni;aP mR3)$! System.err.println("文件下载结束!"); l@ +lUx8 } m3Mo2};? catch(Exception e){e.printStackTrace ();} 8(yZX4OH> } VMry$ g"k1O Lk?%B)z //获得文件长度 Y ^s_v_s public long getFileSize() qPh
@Bl3 { A1b</2 int nFileLength = -1; .hBq1p
try{ G?:{9. ( URL url = new URL(siteInfoBean.getSSiteURL()); b2}>{Li0 HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); W62 $ HI httpConnection.setRequestProperty("User-Agent","NetFox"); v"nN[_T
Bw;gl^:UG .YV{w L@cB int responseCode=httpConnection.getResponseCode(); *&WkorByW if(responseCode>=400) -6 WjYJx { _|f1q processErrorCode(responseCode); 4&r5M return -2; //-2 represent access is error K U 2LJ_~Y } )?5027^ D{-h2=V RMinZ}/ String sHeader; s)Gnj; IM.sW'E )7$1Da|. for(int i=1;;i++) p`/"e<TP { J1i{n7f=@ //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); pbfIO47ZC //Utility.log(in.readLine()); f`ro{p sHeader=httpConnection.getHeaderFieldKey(i); `pMI@"m if(sHeader!=null) h |Ofi { a`c#-
je if(sHeader.equals("Content-Length")) 4LG[i}u.N { =>?;Iv'Z nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); j@N z break; bjn: e!} } #[ei/p } /_WAF90R? else eUBf-xA break; k|C~qe3E } icO$9c } }BF!!* catch(IOException e){e.printStackTrace ();} bQU{)W catch(Exception e){e.printStackTrace ();} F$L2bgQR?' 1NHiW
v &zuPt5G| Utility.log(nFileLength); D4@).% :;Lt~:0b~ 2C6o?*RjyY return nFileLength; mLEJt,X } myq@X(K s9[?{}gd Dno]N //保存下载信息(文件指针位置) NCrNlHIF private void write_nPos() Cz1Q@<) { s ;3k#-w try{ Hw0S/ytY output = new DataOutputStream(new FileOutputStream(tmpFile)); |`T$Iq output.writeInt(nStartPos.length); =`MxgK + for(int i=0;i<nStartPos.length;i++) ae%Bl[ { u+5&^"72, // output.writeLong(nPos); ?;GbK2\bj output.writeLong(fileSplitterFetch.nStartPos); \d'>Ky;GD output.writeLong(fileSplitterFetch.nEndPos); /9SEW!E } Y ~TR`y
output.close(); Z\YCjs% } 7 XNZEi9o catch(IOException e){e.printStackTrace ();} 7
KuUV!\h` catch(Exception e){e.printStackTrace ();} ~FP4JM,y6 } ]\~s83?X (vR9vOpJ 8v<802 //读取保存的下载信息(文件指针位置) F"-u8in` private void read_nPos() dd+hX$, { H{)DI(,Y^P try{ YkN0,6 DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); w3n6md int nCount = input.readInt(); `49: !M$i nStartPos = new long[nCount]; OO?;?? nEndPos = new long[nCount]; 1>c^-"#e^ for(int i=0;i<nStartPos.length;i++) J-UqH3({Z, { \m xi8Z
w nStartPos = input.readLong(); YW14X nEndPos = input.readLong(); x?"+Or.h } dguN<yS-E input.close(); ?&`PN<~2z } MyZ5~jnr\ catch(IOException e){e.printStackTrace ();} <r>1W~bp.q catch(Exception e){e.printStackTrace ();} \CU-a`n } .](~dVp%~ @u>:(9bp gzMp&J private void processErrorCode(int nErrorCode) U/#X,Bi~ { wsKOafrV System.err.println("Error Code : " + nErrorCode); gAudL)X } ^)nIf)9}7 r!N> FE C8Oh]JF4d //停止文件下载 1zc aI^e# public void siteStop() $etw'c0 { +s j2C bStop = true; .),Fdrg for(int i=0;i<nStartPos.length;i++) ykS-5E` fileSplitterFetch.splitterStop(); DqJzsk'd3 "C]v c]/X
>8; } B*@0l: } F(;=^w //负责部分文件的抓取 e"d-$$'e **FileSplitterFetch.java &cpqn2Z
*/ -=InGm\Y package NetFox; z%q)}$O <#ng"1J p
2>\ import java.io.*; W9rmAQjn import java.net.*; &*Z"r* Z?f-_NHg 9
df GV!Z public class FileSplitterFetch extends Thread { gq7l>vT. ;u?L>(b g=na3^PL6 String sURL; //File URL (|2:^T+ long nStartPos; //File Snippet Start Position t"$#KP< long nEndPos; //File Snippet End Position 1YtbV3 int nThreadID; //Thread's ID f
q&(&(| boolean bDownOver = false; //Downing is over yog( boolean bStop = false; //Stop identical J$^"cCMr FileAccessI fileAccessI = null; //File Access interface h( DmSW N|2PW ~, &5y|Q? public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException adn2&7H { `'E(L& this.sURL = sURL; zHX7%x,Cq this.nStartPos = nStart; h]vuBHJ} this.nEndPos = nEnd; 1>=]lMW nThreadID = id; >c@jl fileAccessI = new FileAccessI(sName,nStartPos);//定位 Tr.u'b( } mhgvN-? "h M,vCAZ ZK4d;oa", public void run() 7PbwCRg { o_sb+Vn| while(nStartPos < nEndPos && !bStop) 4*&2D-8<K { Tg@:mw5 7Tc^}Q cz41<SFL try{ "=Cjm`9~j URL url = new URL(sURL); @:/H)F^x HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); &a'mh httpConnection.setRequestProperty("User-Agent","NetFox"); j"
5 +"j String sProperty = "bytes="+nStartPos+"-"; 0TqIRUz "C httpConnection.setRequestProperty("RANGE",sProperty); ~,Kx"VK Utility.log(sProperty); cB6LJ}R 7S{yKS pS~=T}o InputStream input = httpConnection.getInputStream(); {%D4%X< //logResponseHead(httpConnection); IP!`;?T= W.(Q
u-AE( %$&_! byte[] b = new byte[1024]; WS.lDMYE7 int nRead; cS%;JV>C
while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) a] P0PH~ { xz-?sD/xe nStartPos += fileAccessI.write(b,0,nRead); gs(ZJO1 /L //if(nThreadID == 1) 6J<R;g23R] // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); *o=[p2d"X } T2_b5j3i E/hO0Ox6 Ce:w^P+ Utility.log("Thread " + nThreadID + " is over!"); $#-O^0D bDownOver = true; @6Z6@Pq(xQ //nPos = fileAccessI.write (b,0,nRead); b"y4-KV } +' SG$<Xv catch(Exception e){e.printStackTrace ();} &<EixDi4q } &&7&/
} 07G'"= r<[G~n hf:\^w //打印回应的头信息 T*%O\&'r public void logResponseHead(HttpURLConnection con) v+~O\v5Q { "I
QM4: for(int i=1;;i++) x~E\zw { 0D/7X9xg9+ String header=con.getHeaderFieldKey(i); g~XR#vl$ if(header!=null) |qf ef& //responseHeaders.put(header,httpConnection.getHeaderField(header)); GK[9Cm"v Utility.log(header+" : "+con.getHeaderField(header)); pHKc9VC else hm0MO,i" break; ,rX|_4n* } ~Kt2g\BSok } 9vBW CCf ,7)zavA Ud_0{%@ public void splitterStop() xk7VuS* { \;1nEjIA bStop = true; m U= 3w } 9h"3u;/, \.]C`ocD h\4enu9[RL } eyy%2>b L\q-Z..
y$9XHubu /* yeLd,M/I **FileAccess.java S;tvt/\!Z *//文件访问(定位,写) _FkH;MG WS package NetFox; IM_SZs import java.io.*; M%OUkcWCk ZyV^d3F@$ P} w0= public class FileAccessI implements Serializable{ 2>g!+p Ox MaZVGrcC //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 hV NT RandomAccessFile oSavedFile; QTU$mC] long nPos; 8{ )N%r ;P^}2i[q>[ -YS9u[
public FileAccessI() throws IOException :464~tHI[` { 1]"S? this("",0); A#gy[.Bb } eC@b-q xmejoOF CUx-k|\ public FileAccessI(String sName,long nPos) throws IOException .ZupsS9l { Hq|{Nt%Q oSavedFile = new RandomAccessFile(sName,"rw"); 5Vr#>W this.nPos = nPos; 'VV"$`Fu" oSavedFile.seek(nPos); <CWOx&hr } K@?K4o
{a,U{YJ\H
1aezlDc* public synchronized int write(byte[] b,int nStart,int nLen) \CBL[X5tr { S<g~VK!Tt int n = -1; t\O#5mo try{ SmV}Wf oSavedFile.write(b,nStart,nLen); (8(P12l n = nLen; <m*j1|^{t } `We?j7O catch(IOException e) 6 )lWuY]e { 'OU`$K7n e.printStackTrace (); S_;m+Ytg } \*Z:w3;r 5k;}I|rg % NYeL1h)l return n; dvLL~VP } =00sB _Nf%x1m5s =(Y+u } [f?x,W~ 0y%s\,PsT S~B{G T\M /* Zbf~E { **SiteInfoBean.java ,Y@4d79 */ IO"q4(&;P4 package NetFox; yY!@FGsA o4,9jk$ &(NW_<( public class SiteInfoBean { 'JJ : of>H&G)@ A`V:r2hnb private String sSiteURL; //Site's URL ~n%]u! 6 private String sFilePath; //Saved File's Path cK75Chsu private String sFileName; //Saved File's Name V=E5pB`Pr private int nSplitter; //Count of Splited Downloading File j3fq}>= B %
AIw~@*T public SiteInfoBean() |5*:ThC[ {//nSplitter的缺省值为5 <W/YC2b //default value of nSplitter is 5 # (-?i\i this("","","",5); oTveY } ;oOv~YB7H EV_u8?va /a\]Dwj5 public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) k;HI-v { Dk}txw}# sSiteURL= sURL; 5KW
n >n sFilePath = sPath; 6>[J^k%~w) sFileName = sName; CIQ9dx7> this.nSplitter = nSpiltter; G5UNW<P2C bLO^5` 6 3A3WD+[L } ygxaT"3"= RggO|s+0;
|&~);>Cq2 public String getSSiteURL() wvH*<,8Vq { '&Tz8.jp~ return sSiteURL; ~/!jKH7`j } 7lAn GP.; q5.5%W \7Fp@ .S3 public void setSSiteURL(String value) 5Z[HlN|-! { $SU<KNMZ sSiteURL = value; ]T%wRd5&- } /brHB @$ 'E cd\p &7KX`%K"D public String getSFilePath() ~uuM0POo { ZSn6JV'g return sFilePath; z=TuUl@ } v&xhS
yZ zI_pP?4;.q SA~oGgk=P public void setSFilePath(String value) ]C>h_,EZc { nz Klue sFilePath = value; j^D/,SW } 7
;x
to = vZIx> :~~\{fm public String getSFileName() :-j/Y'H_ { /Tp>aW%}" return sFileName;
QLZ%m $Z } fAD
{sg (n2=.9k! [L?WM>]% public void setSFileName(String value) jNAboSf2Y { r:,"k:C sFileName = value; FwDEYG } .FvIT]k- <\L=F8[ LF!S`|FF public int getNSplitter() MYUL y2) { dDqT#N?Y return nSplitter; z*WQ=l2 } XpdjWLO]C< $~T|v7Y% 2l +t- public void setNSplitter(int nCount) xsg55` { kj`h{Wc[) nSplitter = nCount; T>m|C}yy } 1fV\84m^ } -\g@s@5 {QIdeB[ D}?JX5. /* wArzMt}[ **Utility.java OJs
s */ _j]vR package NetFox; _+qtH< F/ V/J-zH& 4x" je public class Utility { R'aA\k- 8-)@q| }SGb`l public Utility() CMYkxU { `W %R B{NGrC`5)
1Pd2% } l6T5]$ ?8$h%Ov- //线程睡眠 .7n`]S/ public static void sleep(int nSecond) P,7beHjf { $WbfRyXi7' try{ /?:q9Wy Thread.sleep(nSecond); 9<"l!noy } 7/FF}d catch(Exception e) :qvaI, { eX o@3/ e.printStackTrace (); 0y=lf+xA* } :Q>{Y } )IGx3+I
, ^%/d]Zwb //日志 b+THn'2 public static void log(String sMsg) Og"\@n { 3Oe\l[?$; System.err.println(sMsg); @BqSu|'Du, } kDWvjT n<MreKixE :SVWi}:Co1 public static void log(int sMsg) 8z*/J=n { %>,Kd6bdg System.err.println(sMsg); rq^VOK|L } Z|zT%8.8N } HeM- 'dcO-A:> 01o,9_|FL /* |3 v+&eVi **TestMethod.java 3NgyF[c */ +'9eo%3O package NetFox; 6g'+1%O ]}BT'fky# ]PZ\N~T public class TestMethod { .q9i10C F vHd` T :X A public TestMethod() >FReGiK$T { ///xx/weblogic60b2_win.exe E7|P\^}m(f try{ RU,!F99'1 SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); )5ISkbsxD //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); 9C\@10 D SiteFileFetch fileFetch = new SiteFileFetch(bean); i,y7R?-K fileFetch.start(); ;Y`k-R:E6A } X8(WsN catch(Exception e){e.printStackTrace ();} (W_U<~`t iFaC[(1@a z229:L6" } w&LL-~KI+ R5MY\^H/A {&.?u1C.\ public static void main(String[] args) A{ a`%FAV { w-?Cg8bq< new TestMethod(); x-@6U } ZVz`-hB } f}+8m .g2 点击下载更多相关资料
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