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/* 9yz@hdG **SiteFileFetch.java % {-r'Yi% */ uS5G(} [ package NetFox; 25 cJA4 import java.io.*; (hEg&@ import java.net.*; _y&XFdp 8u%,5GV>Xr 09qfnQG public class SiteFileFetch extends Thread { Y"L |D,ex QBh*x/J pu5%$}dBE SiteInfoBean siteInfoBean = null; //文件信息Bean IhRdn1& long[] nStartPos; //开始位置 zf>*\pZE long[] nEndPos; //结束位置 ;;6$d{ FileSplitterFetch[] fileSplitterFetch; //子线程对象 ~ #7@;C<nt long nFileLength; //文件长度 8@Bm2?$}g boolean bFirst = true; //是否第一次取文件 &(lQgi+^! boolean bStop = false; //停止标志 F^Bk @ File tmpFile; //文件下载的临时信息 <HtGp6q DataOutputStream output; //输出到文件的输出流 =R<92v }2Tq[rl~s //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) z'*"iaX<c public SiteFileFetch(SiteInfoBean bean) throws IOException W1521: { $01csj siteInfoBean = bean; &u~Pp=kv //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); y)"rh /; tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); --EDr>'D5P if(tmpFile.exists ()) S+"Bq:u" { TOhWfl; bFirst = false; mfG m>U read_nPos(); Gu@C*.jj! } E*h!{)z@F else N\];{pe> { AOJ[/YpM nStartPos = new long[bean.getNSplitter()]; !C h1q nEndPos = new long[bean.getNSplitter()]; I{h KN V } 0'
oXA'L-J F]t=5
-O< +u&[ j/ F-$!e?,H } s/.P/g%tA> wqi0%Cu* Z~<=I }@ public void run() &>B"/z { 8Ihl}aguW //获得文件长度 e"_kH_7sv //分割文件 JEaTDV_ //实例FileSplitterFetch d14 n> //启动FileSplitterFetch线程 o2'Wu:Y" //等待子线程返回 8N+T=c try{ 0n'vF&E8
if(bFirst) }%z%}V@(& { ;>L8&m)R5 nFileLength = getFileSize(); K8Q3~bMf if(nFileLength == -1) P@f#DX
) { k'k}/Hxub System.err.println("File Length is not known!"); C
fM[<w
} KyyVO" else if(nFileLength == -2) ([
-i5 { U1HG{u,"y System.err.println("File is not access!"); D6H?*4f] } +*Z'oC BJ, else h!v<J { ]Vmo> for(int i=0;i<nStartPos.length;i++) -cijLlz%+ { zhm 0J-g nStartPos = (long)(i*(nFileLength/nStartPos.length)); m[KmXPFht1 } JXMH7 for(int i=0;i<nEndPos.length-1;i++) lx=tOfj8 { 1;H"4u_IG& nEndPos = nStartPos[i+1]; *c [^/ } T=)qD2? nEndPos[nEndPos.length-1] = nFileLength; !\[JWN@v } d,?Tq } d#]hqy :vX%0| #\`kg#& //启动子线程 ZX64kk+ fileSplitterFetch = new FileSplitterFetch[nStartPos.length];
)UM^#<- for(int i=0;i<nStartPos.length;i++) ]ly" K!1, { GGhk~H4OP fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), i#hFpZ6u siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), ~!!\#IX nStartPos,nEndPos,i); dJ
m9''T') Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); A= 5Ebu!z fileSplitterFetch.start(); R^$|D)( } ;Xy=;Z.]i // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), 2,F9P+ siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); '5 ~cd // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", as|w} $ nEndPos = " + nFileLength); PCHspe9!y // fileSplitterFetch[nPos.length-1].start(); pA8As `:;q4zij; E_aBDiyDf //等待子线程结束 Y*PfU+y~ //int count = 0; ~mARgv //是否结束while循环 AB`.K{h boolean breakWhile = false; >Rd~-w)!| (/N&_r4x E "}@SaB- while(!bStop) : S3+UT { _1&Ar4: write_nPos(); 9i}$245lB Utility.sleep(500); y:}qoT_. breakWhile = true; z-606g uBa<5YDF N{S) b for(int i=0;i<nStartPos.length;i++) |:&6eDlR { 8"9&x}
tl- if(!fileSplitterFetch.bDownOver) uT4|43<
G { w\YS5!P,V breakWhile = false; ,d,2Q break; Xs2 jR14` } w|-3X } ]5c(:T F if(breakWhile) "mf$E| break; jt on \9 ESIP+ U`i5B;k}- //count++; +q'1P}e //if(count>4) 26rg-?;V^ // siteStop(); kuy?n-1g } xF8n=Lc cQyN@W T5."3i System.err.println("文件下载结束!"); 1.F&gP)9 } rBNVI;JZW catch(Exception e){e.printStackTrace ();} 8ROKfPj;z } p8_^6wfg ]*\MIz{56' tLTavE[@ //获得文件长度 &Y=0 0 public long getFileSize() =+Fb\HvX{ {
r!?ga int nFileLength = -1; (Z(S?`') try{ > 0MP[ URL url = new URL(siteInfoBean.getSSiteURL()); Z|uvrFa HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); 3T F_$bd{ httpConnection.setRequestProperty("User-Agent","NetFox"); p>`rTaeZg Iz09O:ER 1xW!j!A; int responseCode=httpConnection.getResponseCode(); <.QaOLD if(responseCode>=400) 7;fC%Fq { eZa*WI= processErrorCode(responseCode); fx5S2%f^ return -2; //-2 represent access is error SQ_?4 s:: } 8m?(* [[ B#Ybdp ; bTc>-e, String sHeader; lD0-S0i D4!;*2t V|97; for(int i=1;;i++) /{i~-DVME {
dZ`Y>wH_ //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); 7 H //Utility.log(in.readLine()); y9 {7+] sHeader=httpConnection.getHeaderFieldKey(i); %Hbq3U30 if(sHeader!=null) 112WryS { qjP~F if(sHeader.equals("Content-Length")) W^tD6H; { WMf /
S"= nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); cERIj0~ break; m4hkV>$d } J[ Gpd } SKL 4U5D{ else @|anu&Hm break; xz8e1M } ltNCti{Q } iWf+wC| catch(IOException e){e.printStackTrace ();} G&g;ROgY catch(Exception e){e.printStackTrace ();} 2!sPgIz E(r_mF7: V#7,vas Utility.log(nFileLength); \34vE@V* XIl<rN@- Jw;~ $ return nFileLength; 3U@jw,K!{A } ]<>cjk.ya 4>jHS\jc O2{["c
e //保存下载信息(文件指针位置) SH?McBxS private void write_nPos() |u>(~6 { x.+T65X~4 try{ XHk"nbj output = new DataOutputStream(new FileOutputStream(tmpFile)); \G gh 95y output.writeInt(nStartPos.length); U6M~N0)Yr for(int i=0;i<nStartPos.length;i++) ;
j!dbT~5 { bej(Ds0 // output.writeLong(nPos); ]->"4,} output.writeLong(fileSplitterFetch.nStartPos); S;% &X output.writeLong(fileSplitterFetch.nEndPos); D;pI!S<# } <a6pjx>y output.close(); 6nW)2LV } PlkZ)S7C catch(IOException e){e.printStackTrace ();} 6<];}M_{ catch(Exception e){e.printStackTrace ();} H
-Mb:4 } PAYw:/(P ~S8:xG+s Qo#]Lo> \g //读取保存的下载信息(文件指针位置) V+E8{|dYL private void read_nPos() #DUfEZ { {v|!];i try{ |UXSUP
@s DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); +F8{4^w1 int nCount = input.readInt(); z{rV|vQ nStartPos = new long[nCount]; mJUM#ry nEndPos = new long[nCount]; <1|[=$w for(int i=0;i<nStartPos.length;i++) Tx;a2:6\[ { 7?Wte&C];p nStartPos = input.readLong(); ..)J6L5l nEndPos = input.readLong(); $l]:2!R } E!9WZY input.close(); k H.dtg_ } A(FnU: catch(IOException e){e.printStackTrace ();} FCEy1^u catch(Exception e){e.printStackTrace ();} %~!4DXrMk } ^K?-+ d?fS#Ryb qbv\uYow3k private void processErrorCode(int nErrorCode) >WSh)(Cg { PK[mf\G\ System.err.println("Error Code : " + nErrorCode); h9)S&Sk{s } ybBmg'198 |R}=HsYey >w
S'z]T9 //停止文件下载 k>($[;k|b public void siteStop() Ehx9-*] { Tv=lr6t8 bStop = true; S^rf^% for(int i=0;i<nStartPos.length;i++) `8!9Fp fileSplitterFetch.splitterStop(); h=#w< @ [YOH'i&X Z`S#> o } w2DC5ei' } ix!xLm9\ //负责部分文件的抓取 m/=nz. **FileSplitterFetch.java A=N$5ZJ */ 28!C#.(h package NetFox; b>uD-CSA *[[Gu^t^! _SBbd9 import java.io.*; s)1-xA{'. import java.net.*; =)Xj[NNRT 6("_}9ZOc ?:"ABkL|+Y public class FileSplitterFetch extends Thread { /|?$C7%a\D h&0zR#t A=<7*E String sURL; //File URL 2HeX( rB long nStartPos; //File Snippet Start Position &,&+p0CSI! long nEndPos; //File Snippet End Position hXTfmFy{n int nThreadID; //Thread's ID <z<>E1ZLI boolean bDownOver = false; //Downing is over M"3"6U/ e boolean bStop = false; //Stop identical =[(34# FileAccessI fileAccessI = null; //File Access interface ,H]%4@]|o S/]\GG{ gb_Y]U public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException ,X@o@W+L {
2v{WX this.sURL = sURL; FLi'}C this.nStartPos = nStart; &A0OYV3i. this.nEndPos = nEnd; CHgip&(.F nThreadID = id; U{2xgNJ fileAccessI = new FileAccessI(sName,nStartPos);//定位 #V>R#Oh} } P 9?cp{* y[_k/.1 (]]hSkE public void run() !xsfhLZK { Sm'Tz&! while(nStartPos < nEndPos && !bStop) CRb*sfKDL { mnpk9x}m -#Z df| ^DYS~I%s try{ V^_A{\GK URL url = new URL(sURL); ]+D@E2E HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); rB[J*5v httpConnection.setRequestProperty("User-Agent","NetFox"); !Z$d<~Mq q String sProperty = "bytes="+nStartPos+"-"; JEto_&8,C httpConnection.setRequestProperty("RANGE",sProperty); N~)-\T:ap Utility.log(sProperty); ]oGd,v X <`nShP>vl bzi"7%c InputStream input = httpConnection.getInputStream(); "Rj
PTRe: //logResponseHead(httpConnection); s=8H<'l f.6>6%l &4?&tGi byte[] b = new byte[1024]; ]C \+b< int nRead; )?rq8VO while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) a4*v'Xc5 { Q"&Mr+ nStartPos += fileAccessI.write(b,0,nRead); *'Yy@T8M //if(nThreadID == 1) R"t#dG]1t // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); .QvD603%5 } KFrsXf $)M3fZ$# )iN;1> Utility.log("Thread " + nThreadID + " is over!"); f}-'67*Y bDownOver = true; <i~xJi%1# //nPos = fileAccessI.write (b,0,nRead); !l[;,l } F[ E'R.: catch(Exception e){e.printStackTrace ();} '@{:FrG*U } io#}z4"'qY } MPB[~#: 7b"fpB |
eBwcC#^ //打印回应的头信息 `J.,dqGb public void logResponseHead(HttpURLConnection con) u^2`$W { alb3oipOB for(int i=1;;i++) Y%
iqSY { @O#!W]6NT6 String header=con.getHeaderFieldKey(i); Cut~k"lv if(header!=null) VX)8pV$ //responseHeaders.put(header,httpConnection.getHeaderField(header)); 65LtCQ} Utility.log(header+" : "+con.getHeaderField(header)); *;A ;)' else D \ rns+ break; |1@O>GG } dseI~} } ZLQmEF[> !#0)`4O j<^!"_G]*? public void splitterStop() 5%,3)H{;t { r^
r+h[V bStop = true; Zl>SeTjB- } ^6W}ZLp k~[jk5te #49l\>1z } H{}&|;0 E*'Y xI Zmu /* B}"R@;N **FileAccess.java i%i~qTN *//文件访问(定位,写) MzvhE0ab package NetFox; #cY[c1cNv import java.io.*; LLx0X
O@ Ca |}i+ SdH=1zBc public class FileAccessI implements Serializable{ s$fM,l:! 1Yb &E7j //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 NpVL;6?7T RandomAccessFile oSavedFile; ZKi&f,:
long nPos; d@3DsE.{i l,@>J9}Se uaIAVBRcS public FileAccessI() throws IOException 0,hs%x>v { U%vTmdOY this("",0); <'=!f6Wh } 971=OEyq* ;.h /D4 |V34;}\4 public FileAccessI(String sName,long nPos) throws IOException n.+*_c8 k { @<W` w oSavedFile = new RandomAccessFile(sName,"rw"); Iy)1(upM this.nPos = nPos; ,M.C]6YMr oSavedFile.seek(nPos); ~ 5}t; } pm
O9mWq Bl\:YYd vQ<
~-E public synchronized int write(byte[] b,int nStart,int nLen) -ssb|r { 'o&d!
int n = -1; 6J;!p/C8E try{ D`XXR}8V oSavedFile.write(b,nStart,nLen); ;@;aeu n = nLen; 6mcb'hy } _9BL7W $; catch(IOException e) czRBuo+k+ { 9B~&d(Bm e.printStackTrace (); \S h/<z } Tg)F.): 2|k$Vfz t jM9EP return n; -VohU-6 | } YdD; Qx#O $:u*)&"t| YKe&Ph. } -mJs0E*g a
4?A 5 kF1$ /* SS/vw% **SiteInfoBean.java I[E 6N2 */ b`e_}^,c package NetFox; Ug*B[q/ ~&~4{ c|<F8n public class SiteInfoBean { hNc8uV{r= CVO_F=; xa`xHh{0 private String sSiteURL; //Site's URL ,!>
~izB private String sFilePath; //Saved File's Path 4Uny.C] private String sFileName; //Saved File's Name Yo %U{/e private int nSplitter; //Count of Splited Downloading File t'K+)OK ;"D}"nL d- ZUuw public SiteInfoBean() +"84.PZ {//nSplitter的缺省值为5 + }"+ //default value of nSplitter is 5 2*snMA this("","","",5); mc]+j,d } H:~bWd'iz 8cO?VH,nk 1e\cJ{B public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) >FE8CH!W& { ")8l'^Mq2 sSiteURL= sURL; IYn`&jS{ sFilePath = sPath; )B]"""J sFileName = sName; wXQu%F3 this.nSplitter = nSpiltter; ~2*LWH*@ r
(m3"Xu6O 3?E7\\/R } B2r[oT R jNxTy UU =*fq5v public String getSSiteURL() #GGa, @O { xn, u$@F return sSiteURL; <?A4/18K } X!h>13fW !$98U~L {
{?-&
yA public void setSSiteURL(String value) w!UF^~ { KY&Lv^1_| sSiteURL = value; |}{gE=] } `N[@lV\xp! =.s0"[% pwMA,X/{ public String getSFilePath() cPcH
8Vd { i>S@C@~ return sFilePath; *Y85evq } W(s5mX,Kv 1*A^v bF9.k public void setSFilePath(String value) &Sb)a { zgFL/a< sFilePath = value; i).Vu}W#S } x((u Wm1dFf.> O+&;,R: public String getSFileName() wHbmK { `Fcr`[ return sFileName; "(jD*\8x } T=/c0#Q|q 0;x&\x7K W7C1\'T public void setSFileName(String value) N!.o`4 "z { 1E$\&*( sFileName = value; vcW(?4e } In4VS:dD 7zz F M %KF I~Qk public int getNSplitter() 'g<"@SS+ { N?c~AEk9U return nSplitter; <f
(z\pi1 } 2aTq?ZR|8A NEIF1(: )z&C&Gqz
public void setNSplitter(int nCount) ~;6^n { *_YH}U nSplitter = nCount; AxEdQRGk } oM1C/=8
} F&`%L#s| a{ke%W$*P &W3srJo /* t[;-gi,, **Utility.java 5OPvy,e6 */ G5|nt#> package NetFox; v~x`a0 F,as>X# cGs&Kn;h public class Utility { PE;<0Cz\ >'#vC]@ P#3J@aRC public Utility() kXdXyq { ,f%4xXI }@.@k6`n (mbm',%- ( } Dy5&-yk CqWO 0 //线程睡眠 `_.:O,^n^ public static void sleep(int nSecond) y%9Hu { .5>]DZn6 try{ )" Z|x Thread.sleep(nSecond); ^7Z?}tgU } 1Z?uT[kR catch(Exception e) oNYFbZw { Vo[.^0 e.printStackTrace (); cSv;HN: } E3{kH
7_'\ } H/*slqL Hi2JG{i //日志 @/N]_2@8; public static void log(String sMsg) 14l6|a { mz x$(u System.err.println(sMsg); #lik: ? } :RDk{^b) 5w~ 0Q bz 7?F! public static void log(int sMsg) OZz/ip-!lc { Zcw<USF8 System.err.println(sMsg); fHwS12SB } OK-*TPrc } T+gH38!e YHY*dk*|C yzl}!& E /* )b%zYD9p **TestMethod.java 'xG{q+jj' */ [j
TU nP package NetFox; W@zxGH$z> 6)ysiAH? ?Vh#Gr public class TestMethod { JoG(Nk] ,jW a&7 cM<08-:v public TestMethod() N_FjEZpX { ///xx/weblogic60b2_win.exe ,*\s try{ UHk)!P> SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); x1Z'_Qw //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); RZVZ#q(DU SiteFileFetch fileFetch = new SiteFileFetch(bean); t+pA9^$[` fileFetch.start(); j%ZBAk)} } "1>w\21 catch(Exception e){e.printStackTrace ();} T#:b q-@&n6PEOZ )p#L "r^) } CRiqY_gBf B+jh|@- * RX^ z6 public static void main(String[] args) \J#&]o)Y { <gFisc/#r new TestMethod(); "~zLG" } F|'u0JQ)$ } {KK/mAp{ 点击下载更多相关资料
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