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/* ^lHb&\X **SiteFileFetch.java y-w2O] */ Qqd6.F package NetFox; pP|,7c5 import java.io.*; UJee&4C-y import java.net.*; /6+1{p Zi 2o $q Zc!Qc public class SiteFileFetch extends Thread { t$U3|r ksB q+YuVQ-fx SiteInfoBean siteInfoBean = null; //文件信息Bean SQq6X63 \ long[] nStartPos; //开始位置 1^Kj8*O8e long[] nEndPos; //结束位置 Yw6DJY FileSplitterFetch[] fileSplitterFetch; //子线程对象 6B7< long nFileLength; //文件长度 DJmoW boolean bFirst = true; //是否第一次取文件 ayV6m boolean bStop = false; //停止标志 >;&Gz-lm File tmpFile; //文件下载的临时信息 |HrM_h<X DataOutputStream output; //输出到文件的输出流 ;EgzC^2e 6OfdD.y //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) t9G}Yd[T public SiteFileFetch(SiteInfoBean bean) throws IOException kP7a:(P_g { 7cIC&(h5 siteInfoBean = bean; -'I _*fu //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); k4S} #!
tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); l%rx#;=u if(tmpFile.exists ()) cqeR<len { /SnynZ.q bFirst = false; mgy"|\] read_nPos(); {F'Az1^I= } T#\p%w9d else (7IqY1W { <A)+|Y"^h6 nStartPos = new long[bean.getNSplitter()]; Vo #:CB=8 nEndPos = new long[bean.getNSplitter()]; jr9&.8%W:v } Y8)}PWMs Nc{]zWL9 Uh>.v |P6 |r5e{ } sC% b~ Hl4\M]]/& ddoST``G public void run() HV ;; { D,MyI# //获得文件长度 GtF2@\ //分割文件 Z`rK\Bc //实例FileSplitterFetch >4,{6<| //启动FileSplitterFetch线程 %PzQ\c //等待子线程返回 'nMApPl try{ A^pu if(bFirst) =g@R%NDNV { zu52 p4 nFileLength = getFileSize(); CE{z-_{^ if(nFileLength == -1) D,k(~ { WElrk:b System.err.println("File Length is not known!"); jRofG' } R4V \B else if(nFileLength == -2) 0Qm"n6NQ { j8pFgnQ System.err.println("File is not access!"); SC'BmR"ox } ^Z2kq2}a else , 7Xqte { *9J1$Wa for(int i=0;i<nStartPos.length;i++) 5|{)Z]M%9 { !L77y^oV nStartPos = (long)(i*(nFileLength/nStartPos.length)); z/S,+!|z } O7v]p for(int i=0;i<nEndPos.length-1;i++) R8tF/dx>7 { .Y! :x=e nEndPos = nStartPos[i+1]; oAY_sg+ } _().t5< nEndPos[nEndPos.length-1] = nFileLength; r:-WzH(Ms } ;
yyO0Ha } tev QW GJX4KA8J Y&s2C%jT //启动子线程 `|]e6Pb fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; }'lNi^"XL for(int i=0;i<nStartPos.length;i++) h2% J/69 { uyFn}y62 fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), B
s,as siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), NgHpIonC nStartPos,nEndPos,i); ,>u=gA&} Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); VpSEVd:n fileSplitterFetch.start(); CN/IH } @;m$ua*|: // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), ;`kWpM; siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); W}h|K:-S // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", ;-Ss# & nEndPos = " + nFileLength); 1~'_K9eE // fileSplitterFetch[nPos.length-1].start(); |q_
!.
a ('t kZt%8 >!}`%pk( //等待子线程结束 -u|l}}bh //int count = 0; t^.'>RwW| //是否结束while循环 )Pli}) boolean breakWhile = false; }~Q5Y3]#~ J3G7zu8 _UkmYZ/ while(!bStop) =OYQM<q { W/r^ugDV write_nPos(); t[EfOQ Utility.sleep(500); &!jq!u$( breakWhile = true; c&f
y{}10 6^;^rUlm Zn&k[?;Al for(int i=0;i<nStartPos.length;i++) 2J<&rKCF { hmZvIy( if(!fileSplitterFetch.bDownOver) yG&2UqX { iITp**l breakWhile = false; C0fmmI0z~ break; YsP/p- } bC~~5Cm } Q2/.6O8 if(breakWhile) ~Fw<eY break; ?+r!z $b>}C= gt -#?<05/C> //count++; qzK("d //if(count>4) m=TJDr- // siteStop(); g_w&"=.jBq } 9cd 8=][ K)S;:MLG= .0|=[| System.err.println("文件下载结束!"); Q>8pP \ho } [;KmT{I9 catch(Exception e){e.printStackTrace ();} st/n"HQ } \cQ .|S R#(G%66
%y"J8;U //获得文件长度 vG
Vd public long getFileSize() 7
({=* { xNpg{cQ= int nFileLength = -1; >fzwFNdo try{ sG,+
URL url = new URL(siteInfoBean.getSSiteURL()); Y)XvlfJ,h? HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); >t3'_cBC! httpConnection.setRequestProperty("User-Agent","NetFox"); g:<? )NT5yF,m n.hElgkUOr int responseCode=httpConnection.getResponseCode(); W#XG; if(responseCode>=400) \M(*=5 { u@=?#a$$ processErrorCode(responseCode); 9vI]LfP return -2; //-2 represent access is error = .oHnMX2M } *Oo &}oAj Dag`>|my 6T+ String sHeader; 4/*H.Fl ~p*1:ij ],lV}Mlg* for(int i=1;;i++) |d7$*7TvV { G>
\Tbx //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); LdTdQ,s< //Utility.log(in.readLine()); wAYB RY[ sHeader=httpConnection.getHeaderFieldKey(i); q0O&UE)6Y if(sHeader!=null) lKKERO5+ { ZA\/{Fw if(sHeader.equals("Content-Length")) zgKY4R{V { R Fko>d nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); "Xn%at4 break; $/_qE } 0a2@b"l } .Q>!B?) else &ZJgQ-Pc(m break; ^#e~g/ } xx8U$,Ng } :reTJQwr catch(IOException e){e.printStackTrace ();} Z$'IBv catch(Exception e){e.printStackTrace ();} 8Fq_i-u K:5eek ?KWj}|% Utility.log(nFileLength); nWWM2v ~
3T,&?r fgF;&(b return nFileLength; $'"8QOnJ?k } SKXD^OH F}X0', 7m1KR#j //保存下载信息(文件指针位置) Kt/)pc private void write_nPos() AQ{zx1^2>K { 4TRG.$2[ try{ {CUk1+ output = new DataOutputStream(new FileOutputStream(tmpFile)); UUtbD&\ output.writeInt(nStartPos.length); 4]&<?"LSK for(int i=0;i<nStartPos.length;i++) cHD%{xlb { "uD=KlA // output.writeLong(nPos); ZR3nK0 output.writeLong(fileSplitterFetch.nStartPos); lDc;__}Ws output.writeLong(fileSplitterFetch.nEndPos); . (`3JQ2s }
lCb+{OB output.close(); y79qwM. } c-CYdi@ catch(IOException e){e.printStackTrace ();} KN[d!}W: catch(Exception e){e.printStackTrace ();} 6C-YyI#s# } !3}deY8;# >HTbegi IcF@F>> //读取保存的下载信息(文件指针位置) 85 ]SC$ private void read_nPos() ;IZ?19Q { g]$
4~"|. try{ <{ru|-9 DataInputStream input = new DataInputStream(new FileInputStream(tmpFile));
K5"sj|d& int nCount = input.readInt(); d"THt} nStartPos = new long[nCount]; Q9>U1]\ nEndPos = new long[nCount]; (f1M'w/OD for(int i=0;i<nStartPos.length;i++) q<{NO/Mm { O`W%Tr nStartPos = input.readLong(); k%Vv?{g nEndPos = input.readLong(); g-)mav } cT'w= input.close(); fCUT[d +H } [Ot,q/hBJ catch(IOException e){e.printStackTrace ();} I6w~H?ul@* catch(Exception e){e.printStackTrace ();} B)=~8wsI:Z } ($!KzxF3 rVryt<2:@r e!x6bR9EZ private void processErrorCode(int nErrorCode) {aj/HFLNY { %c/^_. System.err.println("Error Code : " + nErrorCode); %:u[MBe , } )]Ti>R O7 s#-eN)1R t#~?{i@m //停止文件下载 F@vbSFv)/ public void siteStop() Cmd329AH { y]
V1b{9p bStop = true; 'K@0Wp for(int i=0;i<nStartPos.length;i++) _sMs}?^ fileSplitterFetch.splitterStop(); r%=[},JQ [ygF0-3ND +m$5a
YX } #V_GOy1- } mJ //负责部分文件的抓取 /iM$Tb5 **FileSplitterFetch.java 79Bg]~}Z */ ?y7w} W package NetFox; Of7+/UV e<\<,)9@/ RA1yr+) import java.io.*; tIZ~^*' import java.net.*; :@. ; 'jaoO9KY
K >|udWd^$3 public class FileSplitterFetch extends Thread { T] | d5E oRY!\ADR jX
*/piSq String sURL; //File URL /oP^'""@je long nStartPos; //File Snippet Start Position J)x3\[}Ye long nEndPos; //File Snippet End Position c{3rl;Cs int nThreadID; //Thread's ID s:|M]. boolean bDownOver = false; //Downing is over y!Cc?$]_Y boolean bStop = false; //Stop identical ~!:0iFE&H FileAccessI fileAccessI = null; //File Access interface \L]|-f(4 <$Yi]ty f} K`Jm_}? public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException l I-p_K { (.X]F_*sc this.sURL = sURL; =nxKttmU0 this.nStartPos = nStart; tJD]
(F this.nEndPos = nEnd; *i%quMv nThreadID = id; Jh@_9/? fileAccessI = new FileAccessI(sName,nStartPos);//定位 tS?lB05TOR } 5vOC CW }STYG` l[Z)@bC1 public void run() $&{IKP)u { 80hme+e while(nStartPos < nEndPos && !bStop) tL(B pL' { T1
MY X ?b:_AO& Faac]5u:* try{ v,1F--v URL url = new URL(sURL); $|<m9CW HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); >S#ul? httpConnection.setRequestProperty("User-Agent","NetFox"); tFh|V
pB String sProperty = "bytes="+nStartPos+"-"; I$jvXl=$ httpConnection.setRequestProperty("RANGE",sProperty); ijYvqZ_ Utility.log(sProperty); .ER 98 N}Vn;29 _m'ysCjA InputStream input = httpConnection.getInputStream(); H{zPft //logResponseHead(httpConnection); :7b-$fm ;#QhQx <Oz66bTze byte[] b = new byte[1024]; W|R-J int nRead; GESXc$E8 while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) *HlDS22 { 96Zd M= nStartPos += fileAccessI.write(b,0,nRead); ltA/ //if(nThreadID == 1) PZOKrW // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); a(x?fa[D } "4 k-dj ?]!vRmZ; ><Z'D Utility.log("Thread " + nThreadID + " is over!"); %xlpB75N4N bDownOver = true; 1y[B[\ //nPos = fileAccessI.write (b,0,nRead); U[8{_h<# } fE25(wCz7 catch(Exception e){e.printStackTrace ();} Yp5L+~J[ } =3'(A14C= } 6?gi_3g
uP|FJLY zhsx& //打印回应的头信息 `deYi 2z public void logResponseHead(HttpURLConnection con) |f' 8p8J { sdr.u for(int i=1;;i++) X r_pgW| { +_m r String header=con.getHeaderFieldKey(i); HeIS;gfUY if(header!=null) G$=-,6kZO //responseHeaders.put(header,httpConnection.getHeaderField(header)); y-+G
wa3 Utility.log(header+" : "+con.getHeaderField(header)); @$U e$ else vDE |sT break; Z)9R9s } %e=!nRc } T\sNtdF`: (B#(Z= C0m\SNR public void splitterStop() =ApY9` { Q7a(P bStop = true; k0ItG?Cv } *\ECf.7jz 8wFn}lw& P6Xp<^%E } w|Qd` +/cgw, Gp|JU Fo /* gGfq6{9g **FileAccess.java =/Juh7[C *//文件访问(定位,写) uqZ3Hyb package NetFox; ,2zKQ2z import java.io.*; m&El) 3|eUy_d3 r+\/G{+=} public class FileAccessI implements Serializable{ JvJ;bFXD Q[_Ni15 //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 J/kH%_ >Ir RandomAccessFile oSavedFile; dR[o|r long nPos; ^k72{ 3N( 'JZ_ c@OP5L>{ public FileAccessI() throws IOException 8
/m3+5 { ^H=o3#P~L this("",0); hyu}}0: } _*`q(dYcf >q9{ 0k1MKzi Q public FileAccessI(String sName,long nPos) throws IOException MSY N1 { $u5.!{Wq? oSavedFile = new RandomAccessFile(sName,"rw"); ,nYZxYLf+ this.nPos = nPos; cU | _ oSavedFile.seek(nPos); !5.v'K' } ;=p;v .l WZ*&@|w Sx&mv.?X public synchronized int write(byte[] b,int nStart,int nLen) :ICr\FY$ { gb-tNhJa@b int n = -1; sU%"azc try{ }td6fj_{ oSavedFile.write(b,nStart,nLen); d*9j77C ] n = nLen; b|wWHNEdb, } o*_g$ catch(IOException e) 3yMt1 fy { 2np-Fc{S e.printStackTrace (); <^sAY P| } l $ Zs~@N J/7u7_ M?hFCt3Y return n; <2)v9c } Xz* tbW#
5KaSWw/ 9|a)sb7/ } $4h04_" ~UW{)]_jox Q9q9<J7j$ /* FB!z#Eim **SiteInfoBean.java va+m9R0 */ =n)#!i package NetFox; rgn|24x {~1M ?,V;f2c public class SiteInfoBean { gTD%4V O3}P07 !vrnoFVu private String sSiteURL; //Site's URL VY{,x;O` private String sFilePath; //Saved File's Path ,whM22Af~{ private String sFileName; //Saved File's Name %w@ig~vD' private int nSplitter; //Count of Splited Downloading File ASM1Y]'Z .lG+a!) _!;\R7] public SiteInfoBean() %\ _h7: {//nSplitter的缺省值为5 gyg|Tno //default value of nSplitter is 5 4sQ~&@[Q+ this("","","",5); Bf(Mot^ } 04[)qPPS dcR6KG 8 y|LXDq4Wj public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) 6d(b'S^ { Y?e3B x7*b sSiteURL= sURL; bZnDd sFilePath = sPath; $"(3M nR sFileName = sName; EKJH_!% this.nSplitter = nSpiltter; IjgBa-o/V MIJ%_=sm4: 8ZzU^x } >:fJhF@ ]q37 Hj *<;&>w8 public String getSSiteURL() [L)V(o)v { Z%A<#% return sSiteURL; @Zh8 QI+ } Y~x`6 Wd1 IX^7C% tUn&z?7bF public void setSSiteURL(String value) 5
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{ v.]'%+::# sSiteURL = value; iiQ||P}5 } ^$6bs64FSm
bsD'\ #d$d&W~gE public String getSFilePath() F^[M { ^>t-v return sFilePath; YU*46 hA1B } =7H.F:BBG 64;oB_ }%
FDm@+ public void setSFilePath(String value) bmSpbX\ { <w%Yq?^ sFilePath = value; sCL/pb] } Yoj~|qL >^sz5d+X aB7d( public String getSFileName() _TV2) { upZYv~Sa return sFileName; / *Ou$ } +q4W0 U_.n=d ~B k_-vT public void setSFileName(String value) 'aLPTVM^ { 01UqDdoj sFileName = value; oR4fK
td } iRkOH]+K DKf}47y t=A E7 public int getNSplitter() |~Htj4K/ { LAOdH/*: return nSplitter; z2"2tFK } tOu90gu /5a$@% U+I3 P public void setNSplitter(int nCount) ^Osd/g { $#g#[/ nSplitter = nCount; qYQUr8{ } xF2f/y } N}eU.#L Y*h`), Q'>_59 /* D>,$c **Utility.java DtI%-I. */ P6.) P|n7= package NetFox; 1e+h9|hGYw 0Ax>gj-` Hz8Jgp public class Utility { rjhs? 'Y,+D`&i) )< X=z public Utility() PxdJOtI" { ft*G*.0kO tF{{cd
D>!v_v6 } 'd~, o[x 2_B; //线程睡眠 PprQq_j public static void sleep(int nSecond) /zDSlj<c { YA1{-7'Q try{ ]JhDRJ\ Thread.sleep(nSecond); 7%~VOB } Bh.6:9{ catch(Exception e) WVBE>TB { 64IeCAMVo e.printStackTrace (); }V93~> } XPR:_ } [:/7OM /cn/[O9 //日志 b[QCM/ public static void log(String sMsg) u0(hVK`": { n?7hp%} System.err.println(sMsg); U?+3 0{hb } 'Sb6
w+ 7.F& {:@_ W! 5Blo public static void log(int sMsg) )%nt61P\W { hx2!YNx ! System.err.println(sMsg); Wr}a\}R } +9=p*3cnp } 3XYIb Xnk PLY-,Q&' 10QNV=yK7s /* */fs.G:P **TestMethod.java v/4X[6( */ E Ni%ge'": package NetFox; ijR*5#5h bb0{-T)1 ZJ{+_ax0K public class TestMethod { 2t
Z\{= 7J)Hwl %\s#e public TestMethod() tjc5>T[Es8 { ///xx/weblogic60b2_win.exe 0B!mEg try{ ;Wp`th!F SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); f;qKrw //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); hVQ+
J!qD SiteFileFetch fileFetch = new SiteFileFetch(bean); 55jY` b. fileFetch.start(); !:!@dC%8_ } ~O7cUsAi' catch(Exception e){e.printStackTrace ();} da7x 1n$D ]pucv! jv?aB } k6 h^ 1v8:,!C dBi3ZCAF public static void main(String[] args) S+bWD7 { CUTEp/+ new TestMethod(); } cH"lppX } .k?hb]2N } t]YLt , 点击下载更多相关资料
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