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/* 5!qLJmd= **SiteFileFetch.java kk ZMoK */ +m4?a\U package NetFox; x }i'2 import java.io.*; qkD9xFp import java.net.*; )TOKHN /vAA]n8 #K\;)z(? public class SiteFileFetch extends Thread { \
m g ~' q&rvk` 15ImwQ SiteInfoBean siteInfoBean = null; //文件信息Bean <ELqj2`c long[] nStartPos; //开始位置 O6]X\Cwj% long[] nEndPos; //结束位置 dF'oZQz FileSplitterFetch[] fileSplitterFetch; //子线程对象 iCdq-r/r!6 long nFileLength; //文件长度 23'Ac,{ boolean bFirst = true; //是否第一次取文件 Bi|-KS.9 boolean bStop = false; //停止标志 E[M.q;rM File tmpFile; //文件下载的临时信息 %:Y'+!bX DataOutputStream output; //输出到文件的输出流 W <M\b# qhOV>j,d //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) =po5Q6@i public SiteFileFetch(SiteInfoBean bean) throws IOException 3$PGLM { pXf5/u8& siteInfoBean = bean; H;Gd //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); bix}#M tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); SOeRQb' if(tmpFile.exists ()) jN{+$ @cI { zfK3$| bFirst = false; 28O 3N;a read_nPos(); =z9FjK } 1G
63eH)! else I ka
V g L { ~i=5NUE nStartPos = new long[bean.getNSplitter()]; lQ| i
Ws nEndPos = new long[bean.getNSplitter()]; \<x{U3q5 } {%QWv%| .2/W.z2 <v$yXA :2-!bLo}& } M][Zu[\* GL3olKnL ..yLtqos public void run() T9]:,
z { jo ~p#l.' //获得文件长度 7jYW3 //分割文件 :+UahwiRD" //实例FileSplitterFetch HfA@tZ5q|U //启动FileSplitterFetch线程 <%=@Ue //等待子线程返回 zN>tSdNkI- try{ o&kgRv[ if(bFirst) Rs53R$PIR { +6\1
d5 nFileLength = getFileSize(); $<d3g: if(nFileLength == -1) WGI4DzKa { )Q c>NF0 System.err.println("File Length is not known!"); mH7Mch|
m } h;t5v6[" else if(nFileLength == -2) b0[H{q-z{X { yA^+<uz} System.err.println("File is not access!"); |=#uzp7* } 2IFEl-IB[ else =R0#WMf$@ { %$zX a%A for(int i=0;i<nStartPos.length;i++) p"o_0{8 { #i|AE` nStartPos = (long)(i*(nFileLength/nStartPos.length)); o'!WW } S3&lkN5 for(int i=0;i<nEndPos.length-1;i++) Tw!_=zy(Gw { )X5en=[)O nEndPos = nStartPos[i+1]; Schvwlm~i } 7=pJ)4;ZA nEndPos[nEndPos.length-1] = nFileLength; kT4Oal+4 } Hb@PQcj } UYsyVY`Fm| R;F z"J )r6d3-p1 //启动子线程 H1a<&7 fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; P: )YKro] for(int i=0;i<nStartPos.length;i++) 3L-}B#tI { P{o //M fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), I]0
D*z siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), K5:> nStartPos,nEndPos,i); .u&GbM%Ga Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); [TX5O\g![ fileSplitterFetch.start(); Un{ 9reX5 } @M8vPH // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), yn KgNi siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); 9vJ'9Z2\ // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", .?;"iv+ nEndPos = " + nFileLength); #mH4\s // fileSplitterFetch[nPos.length-1].start(); Oh/2$72 '{:lP"\,L Oo8"s+G //等待子线程结束 d(;Qe}ok> //int count = 0; Wf5ohXm> //是否结束while循环 m7NrS?7 boolean breakWhile = false; p^?]xD( VT5o#NR{R uI+^8-HZ; while(!bStop) D|X@aUp8} { (xlAS write_nPos(); %$}*y
Utility.sleep(500); ljw>[wNv breakWhile = true; GB`
G(a k)B]|,g7G0 yZqX[U for(int i=0;i<nStartPos.length;i++) _J-3{a { `T~~yM)q if(!fileSplitterFetch.bDownOver) rd!4u14 { /\|Behif breakWhile = false; l|'{Cb
break; (}&O)3) } 0v'FE35~s } 'I1^70bB if(breakWhile) /Q2{w>^DK break; H<bB@(i 6YpP/
K D?}K|z LQ //count++; EmubpUS; //if(count>4) br_D
Orq| // siteStop(); G5'HrV } J#jx)K! 9ZXEy }q57 rT{+ h}vO System.err.println("文件下载结束!"); Z{spo= } [{cMEV& catch(Exception e){e.printStackTrace ();} OAd}#R\U } (| X? "[p-Iy1 \1cJ?/$_Of //获得文件长度 ?(P3ZTk?. public long getFileSize() :igURr { V
j"B/@ int nFileLength = -1; j SX VLyz try{ KI~M.2pk URL url = new URL(siteInfoBean.getSSiteURL()); n0<I HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); K!BS?n; httpConnection.setRequestProperty("User-Agent","NetFox"); >r~!'Pd! gQ~X;' :;u?TFCRx int responseCode=httpConnection.getResponseCode(); PcQqdU^! if(responseCode>=400) nK;c@!~pS { E G3?C processErrorCode(responseCode); 92)e/t iP return -2; //-2 represent access is error @?\[M9yK } tv8}O([ mu#
a ?^z.WQ|f@ String sHeader; E4dN,^_ F! H:>i:\J/M9 1.y|bB+kB for(int i=1;;i++) 1Wy0#?L { N)N\iad^ //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); Jx_BjkF //Utility.log(in.readLine()); s6| S#
sHeader=httpConnection.getHeaderFieldKey(i); 2#?qey if(sHeader!=null) l=?G"1 { CAvyS if(sHeader.equals("Content-Length")) t>izcO { 1#-=|:U nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); TSHQ>kP break; m C&*K } \C.s%m } )mF;^3 else vS_Ji<W~E break; sGs_w:Hn } 7.N~e}p8 } YdNmnB%J catch(IOException e){e.printStackTrace ();} | Xv]s61 catch(Exception e){e.printStackTrace ();} $m)[> C )S2GPn7 7U_OUUg Utility.log(nFileLength); |SfmQ; pa)2TL/@ _6k ej#o8 return nFileLength; 5fqQ;r } ]E!b& /a:sWmxMT c mI&R( //保存下载信息(文件指针位置) uF89B-t private void write_nPos() 236,o
{9e { TowRY=#jiS try{ ! >l)*jN8 output = new DataOutputStream(new FileOutputStream(tmpFile)); V$';B=M output.writeInt(nStartPos.length); #`(-Oj2hH for(int i=0;i<nStartPos.length;i++) MX\v2["FoV { C}>Pn{wY9 // output.writeLong(nPos); P>s3Rh3: output.writeLong(fileSplitterFetch.nStartPos); F vt5vQ output.writeLong(fileSplitterFetch.nEndPos); b6y/o48 } y2:~_MD output.close(); eW>Y*l%B } a8wQ, catch(IOException e){e.printStackTrace ();} @0{vA\ catch(Exception e){e.printStackTrace ();} =2rkaBFC } 1?}5.*j< u|}p3-z|Y RC>79e/u< //读取保存的下载信息(文件指针位置) G&2`c\u{ private void read_nPos() ;H;c Sn5uL { RAps`)OR? try{ 0l&#%wmJ, DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); ZIo%(IT!c int nCount = input.readInt(); c&AJFED]< nStartPos = new long[nCount]; ?1kXV n$ nEndPos = new long[nCount]; xYUC|c1Q9 for(int i=0;i<nStartPos.length;i++) X zF-g*e { k9Xv@v nStartPos = input.readLong(); YLVZ]fN=> nEndPos = input.readLong(); wq@{85 } _)U[c;^6 input.close(); ^;@Q3~DpP% } Y)oF;ko: catch(IOException e){e.printStackTrace ();} ^vA"3Ixb! catch(Exception e){e.printStackTrace ();} $>csm } }>
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^D.u ft"t private void processErrorCode(int nErrorCode) Z\9DtvV { gfY1:0 System.err.println("Error Code : " + nErrorCode);
BhcTPQsW } PZjK6]N\ `1fNB1c
ZS\~GQbG //停止文件下载 V^[B=|56 public void siteStop() Q]v>< { n |e=7?H8 bStop = true; +8#hi5e for(int i=0;i<nStartPos.length;i++) Q6lC :cB< fileSplitterFetch.splitterStop(); H0P:t(<Gt rOyKugHe T}55ZpSC& } Z;qgB7-M } ]8;2Oh
//负责部分文件的抓取 9ER!K **FileSplitterFetch.java A0f98?j^ */ {dF_=`. package NetFox; p}:"@6 {`>;I lK0pr import java.io.*; 3 J!J# import java.net.*; .WV5Gf) %c"t` nA)KRCi public class FileSplitterFetch extends Thread { [d^ [Y:I'\ #vs=yR/tn{ dPmtU{E<M String sURL; //File URL e_v_y$ long nStartPos; //File Snippet Start Position )U5Ba^"fI long nEndPos; //File Snippet End Position }JlrWJRi int nThreadID; //Thread's ID L $ki>._i\ boolean bDownOver = false; //Downing is over d09qZj> boolean bStop = false; //Stop identical 2k]Jkd,E FileAccessI fileAccessI = null; //File Access interface &hco3HfW (aTpBXGr= n=8DC& public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException XK=-$2n { ,}jey72/k this.sURL = sURL; 76BA1x+G this.nStartPos = nStart; c*c 8S~6 this.nEndPos = nEnd; C>gC99 nThreadID = id; x3L0;:Fx8P fileAccessI = new FileAccessI(sName,nStartPos);//定位 .2v)x } VTIRkC
wl@ GJo`9 oT}-i [=} public void run() wk[4Qsk< { hqwDlapTt while(nStartPos < nEndPos && !bStop) ?Fp2W+M
j { ?Zv>4+Y' ["7]EW\!: >)6d~ try{ lVra&5 URL url = new URL(sURL); p/WE[8U HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); N*NGC!p`N httpConnection.setRequestProperty("User-Agent","NetFox"); yZyB.wT String sProperty = "bytes="+nStartPos+"-"; oH>G3n|U^ httpConnection.setRequestProperty("RANGE",sProperty); _p^&]eQ+k# Utility.log(sProperty); 5`QN<4?% dc=~EG-_rM >tQ$V<YB InputStream input = httpConnection.getInputStream(); 57`*5X //logResponseHead(httpConnection); YU6D; `\Ye:$q ]~d!<x#+ byte[] b = new byte[1024]; #-{^={p" int nRead; /)/>/4O while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) &(/QJ `*8 { mF`%Z~}b nStartPos += fileAccessI.write(b,0,nRead); ';iLk[ //if(nThreadID == 1) ,he1WjL // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); Cak-J~= } R^+,D FwaYp\z y D:}&!\} Utility.log("Thread " + nThreadID + " is over!"); 5q 95.rw bDownOver = true; ToE^%J4 //nPos = fileAccessI.write (b,0,nRead); @?CEi#- } -*AUCns# catch(Exception e){e.printStackTrace ();} sMHP=2## } uz'MUT(68 } \_|g}&}6Y rOA{8)jIa* <
s1 //打印回应的头信息 -![>aqWmj1 public void logResponseHead(HttpURLConnection con) </-aG[Fi { a"bael for(int i=1;;i++) ibL { JthW"{E String header=con.getHeaderFieldKey(i); Q)L6+gW^ if(header!=null) W~Ae&gcn# //responseHeaders.put(header,httpConnection.getHeaderField(header)); v FWg0 $, Utility.log(header+" : "+con.getHeaderField(header)); ]!'9Y}9a else dO!5` ] break; S<Od`I } i{2ny$55h } P`TJqJiY~ CEl9/"0s6 _4-UM2o; public void splitterStop() E;-*LT&{ { s^zX9IVnp bStop = true; i=AQ1X\s } ujan2'YT =QJI_veUG` 6!$2nK+ } <&MY/vV MYMg/>f[ :=e"D;5 /* ZMGthI}~- **FileAccess.java sMNhD/bb *//文件访问(定位,写) E9~}%& package NetFox; PCs`aVZ import java.io.*; l,@rB+u #Zj3SfU~` ;:Q&Rf"@% public class FileAccessI implements Serializable{ (Y:?qy AZf$XHP2 //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 +XoY@|Djd RandomAccessFile oSavedFile; =kDh: &u% long nPos; +Vw]DLWR Y |'}VU 6O|
rI>D public FileAccessI() throws IOException CA]u3bf~ { 2kW*Z7@D this("",0); A|
s\5"?? } ;nbbKQ]u G'0JK+=o ,ocAB;K public FileAccessI(String sName,long nPos) throws IOException i>{.Y}; { [|tlTk oSavedFile = new RandomAccessFile(sName,"rw"); #H-EOXy this.nPos = nPos; Ac8t>;=& oSavedFile.seek(nPos); Mi:i1i
cdn } v18OUPPX v!6IH $q 9dkt public synchronized int write(byte[] b,int nStart,int nLen) $b`~K MO { 4H_QQ6 int n = -1; e=sV>z> try{ Yc2dq e> oSavedFile.write(b,nStart,nLen); 0}qnq" n = nLen; Jm[_X } {vox
x&UX catch(IOException e) O%*:fd,o- { -W.bOr e.printStackTrace (); Wo+^R%K'4 } Y^-D'2P]P )JXy>q#
YES-,;ZQ' return n; h42dk(B } 8Bwm+LYr- NT;cTa=; rtC:3fDy } O*udV E> &@fW6},iW xFp?+a /* 9^1li2z k{ **SiteInfoBean.java @~C
C$Y$ */ h%8C_mA package NetFox; o@uZU4MM n0%5mTUN X1FKcWv public class SiteInfoBean { wuKr9W9Xa \fSo9$ tNC;CP#R+ private String sSiteURL; //Site's URL ^7iP!-w/ private String sFilePath; //Saved File's Path bBgyLyg private String sFileName; //Saved File's Name {4YD_$4W private int nSplitter; //Count of Splited Downloading File e {805^X} *^i"q\n5( V#TNv0&0 public SiteInfoBean() Z7J4rTA {//nSplitter的缺省值为5 Xz\ X 8I //default value of nSplitter is 5 Rv Uw,= this("","","",5); Wp(Rw4j } gPcOm
b gVI T6"/ vpz l{ public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) e`bP=7`0 { ~*hCTqHvN sSiteURL= sURL; j5MUP&/g3 sFilePath = sPath; t`pbEjE0K sFileName = sName; ZDbzH=[ this.nSplitter = nSpiltter; rj/1AK L!0}&i;u~5 &}!AjA) } SlI
wLv^ `i)Pf WdBN >6Ody<JPHP public String getSSiteURL() q_z ;kCHM { =h,J!0Y return sSiteURL; BY>]6SrP } hUe\sv!x? ;! ,I1{` .Z(Q7j^ public void setSSiteURL(String value) (N?nOOQ { *X8Pa;x sSiteURL = value; EL(BXJrx{ } .\mkgAlyaM o,[Em< ~mC>G 4y$a public String getSFilePath() Dn:1Mtj- { _71&".A return sFilePath; ? $.x%G+ } cf%aOHYI* E'^ny4gL 8u7QF4
Id public void setSFilePath(String value) <['ucp
{ d"OYq sFilePath = value; 3hfv^H } 5,9cD`WR^ \]0+J =}'7}0M_= public String getSFileName() 2?kVbF { R{UZCFZ return sFileName; Zx^R -9 } gdkHaLL" *0x!C8*`Xe =55V<VI public void setSFileName(String value) 2hY"bpGW { k_`YVsEYP sFileName = value; qAi:F=> X } 4"#F=f0 z?W kHQ9 \|6Q]3l public int getNSplitter() %J+k.UrM { 8^!ib/@v" return nSplitter; 1pP q)}=+ } py$i{v% emI F{oP ubQr[/ public void setNSplitter(int nCount) EOXuc9>G { [~ !9t9+~ nSplitter = nCount; W4"1H0s`l } J3hhh(
} V$bq|r u3\_![Jt? jJAr #| /* CEJqo8ds **Utility.java >=/DCQ$ */ 0Ok[`r` package NetFox; Sobp;OZ5 3:bP>l! m@"p#pt(_ public class Utility { Kh{_BdN r=# v@]zB `$ pJ2S public Utility() (dP9`Na] { 3`Dyrj#! DI[ !eP0b~$/^J } HpS1(%d" ,15$$3z /E //线程睡眠 zS'{F>w public static void sleep(int nSecond) ! q+>'Mt { ;iz3Bf1o try{ zC`ediyu Thread.sleep(nSecond); e#@u&+K/f } irMBd8WG catch(Exception e) ?f*>=;7= { |-xKH.'n e.printStackTrace (); $]MOAj"LH } U04)XfO;] } cFHSMRB|P vj"['6Xa //日志 KN~Rep cz@ public static void log(String sMsg) uFL!*#A { @%!Gj{ System.err.println(sMsg); Y#FSU#a$< } Hk?E0. y1#QP3'Z1 2[Xe:)d public static void log(int sMsg) 06I(01M1 { USH>`3 System.err.println(sMsg); +1Pu29B0 } G$s=P } 0oo_m6ie& m}+_z^@j9 JC9OL.Ob /* `[~LMV&2U **TestMethod.java sI@kS^ */ OT#foP package NetFox; aZ}z/.b] (, $Lp0mB7 J7k=5Fqej; public class TestMethod { zwK$ q=-: W3&~[DS@~ Ox6^=D" public TestMethod() h([qq<Lzs { ///xx/weblogic60b2_win.exe \3whM6tK try{ 0gr#<( SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); 2>.>q9J( //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); 0$|wj^?U SiteFileFetch fileFetch = new SiteFileFetch(bean); soqnr"
1 fileFetch.start(); wD SSgk } Y^gIvX catch(Exception e){e.printStackTrace ();} j&0t!f.Rv <<6gsKP L>!MEMqm } ~TjTd F2v9XMi \ $
:)Ka public static void main(String[] args) \{1Vjo { A&_v:z4y/ new TestMethod(); Pcr;+'q } <9`/Y"\ p } RMa#z [{0 点击下载更多相关资料
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