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/* `dw">z, **SiteFileFetch.java mqHcD8X */ #SKC>MGz package NetFox; ~!S/{Un import java.io.*; mPU}]1*p import java.net.*; @F]w]d IsmZEVuC hraR:l
D public class SiteFileFetch extends Thread { eR4ib-nS OK)>QGl wz1nV} SiteInfoBean siteInfoBean = null; //文件信息Bean -oUGmV_ long[] nStartPos; //开始位置 #|K{txC
long[] nEndPos; //结束位置 tm/=Oc1p FileSplitterFetch[] fileSplitterFetch; //子线程对象 X::@2{-@y long nFileLength; //文件长度 \=D+7'3 boolean bFirst = true; //是否第一次取文件 +oh |r'~ boolean bStop = false; //停止标志 Nyt*mbd5
{ File tmpFile; //文件下载的临时信息 k-H6c DataOutputStream output; //输出到文件的输出流 Zb=;\l*& MJh.)kd$ //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) _CPj]m{ public SiteFileFetch(SiteInfoBean bean) throws IOException cRH(@b
Xr { wo+`WnDh siteInfoBean = bean; sj4\lpZ3h //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); L pq)TE# tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); X{Fr if(tmpFile.exists ()) o{>4PZ}=g { X1d{7H8A2 bFirst = false; 1d~d1Rd read_nPos(); je@&|9h } &c 2Qa else J6[}o4Z { r95,X! nStartPos = new long[bean.getNSplitter()]; T ay226 nEndPos = new long[bean.getNSplitter()]; zJP jsD] } `+T 2IPN
HU'w[r6a $@@ii+W}\ k,$/l1D } |fywqQFq bfpeK>T 3b\s;! public void run() #q K.AZi { J90:c@O"w //获得文件长度 cpl Ny?UIC //分割文件 Ux1j +}y //实例FileSplitterFetch -8l(eDm"m //启动FileSplitterFetch线程 sZ~03QvkT //等待子线程返回 |||m5(`S try{ ^mjU3q{; if(bFirst) SHs [te[ { XlD=<$Nk7 nFileLength = getFileSize(); !yT=*Cj4 if(nFileLength == -1) p6NPWaBR
{ _h4]gZ System.err.println("File Length is not known!"); q6N{N>-D } akk*f+TD` else if(nFileLength == -2) FAL#p$y} { ZB|s/ System.err.println("File is not access!"); B8eZ}9X } qE3Ud:j else ]zVQL_%, { C[<{>fl) for(int i=0;i<nStartPos.length;i++) 'zav%}b]L { p+<qI~ nStartPos = (long)(i*(nFileLength/nStartPos.length)); p2Gd6v.t } V dvj*I for(int i=0;i<nEndPos.length-1;i++) ]Tb?z& { k~so+k&=b nEndPos = nStartPos[i+1]; ,t QNL\t } Y@:l!4DI nEndPos[nEndPos.length-1] = nFileLength; _f8H%Kgk; } 5=8v\q?)c } G~DHNO6 50dN~(;p [T4{K& //启动子线程 JBA{i45x fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; rz,,ku4qt for(int i=0;i<nStartPos.length;i++) 8\9W:D@"x { @GD $KR9 fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), ?*$uj( siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), lz6CK
nStartPos,nEndPos,i); n|? sNM<J3 Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); zRmVV}b fileSplitterFetch.start(); H;NAS/OhS } wl%ysM|x // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), m'
S{P:TK siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); A W6B[ // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", g33Y$Xdk nEndPos = " + nFileLength); @{{L1[~:0 // fileSplitterFetch[nPos.length-1].start(); WV'u}-v^ :Cezk D& +|b#|>6 //等待子线程结束 6w? GeJ //int count = 0; ^V1\boo= //是否结束while循环 g]JRAM boolean breakWhile = false; Gh.?6kuh AcEz$wy J zFR9DEt while(!bStop) *~4<CP+"0 { o/
51RH write_nPos(); 88<d<)7t Utility.sleep(500); yPT o,,ca= breakWhile = true; KPDJ$,: {`k&Q +gY w8~R=k for(int i=0;i<nStartPos.length;i++) (=WbLNBS { S&-F(#CF^ if(!fileSplitterFetch.bDownOver) ;7EeR M* { w2V:x[ breakWhile = false; L4T\mP7D7* break; |A,.mOT } '5*& } `KLr!<i() if(breakWhile) N-b'O`C break; fj['M6+wd R\X;`ptT \2[tM/+Bs //count++; %-fS:~$ //if(count>4) p
%.Adxx // siteStop(); p<h( } bC"h7$3 +~YoP> 2Mq@5n System.err.println("文件下载结束!"); J=8Y D"1 } z>0$SBQ- catch(Exception e){e.printStackTrace ();} cZ
!$XXA` } }@jJv|| rNicg]:\x ">_|!B&wb^ //获得文件长度 l&e{GHz public long getFileSize() O(-6Zqk8Q { 6:8Nz int nFileLength = -1; kG9aHWw try{ >EA\KrjW URL url = new URL(siteInfoBean.getSSiteURL()); b?cO+PY01 HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); G9xO>Xp^Al httpConnection.setRequestProperty("User-Agent","NetFox"); I(kEvfxc" 8-H:5E 4Y oxeIh9
E int responseCode=httpConnection.getResponseCode(); gBWr)R if(responseCode>=400) R rH{Y0 { |H,WFw1%} processErrorCode(responseCode); R>~I8k9mM return -2; //-2 represent access is error \(=xc2 } 5+Tx01) 8[t*VIXI hT_Q_1, String sHeader; nO'C2)bBSG a(|0'^ ;XyryCo for(int i=1;;i++) DzA'MX { htrtiJ1 //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); i"Hc( lg //Utility.log(in.readLine()); A7XA?>~+| sHeader=httpConnection.getHeaderFieldKey(i); (RrC<5" if(sHeader!=null) D+
.vg?8 { Z
eY*5m if(sHeader.equals("Content-Length")) _-#o[>2[ { MQcIH2 nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); uTz>I'f break; ek/zQM@% } lb*;Z7fx<' } ">h$(WCK else thX4-'i break; 90Sras>F } bQ
0Ab"+D } [e_csQ catch(IOException e){e.printStackTrace ();} sUR5Q/Q catch(Exception e){e.printStackTrace ();} FqGMHM\J )M Tf 9m_~Zs}Z Utility.log(nFileLength); nQ|($V1?W Y`$\o LfU? 1:Du return nFileLength; qe?Ns+j<d } I`jG l O* tQxxm=> //保存下载信息(文件指针位置) l_9Z zN private void write_nPos() &Qj1uf92. { 9C Ki$L try{ ~@QAa (P. output = new DataOutputStream(new FileOutputStream(tmpFile)); m:~y:. output.writeInt(nStartPos.length); .X)Wb{7 for(int i=0;i<nStartPos.length;i++) 5 A5t { -#G>`T~ // output.writeLong(nPos); _\,lv
\u output.writeLong(fileSplitterFetch.nStartPos); [h&s<<#
D output.writeLong(fileSplitterFetch.nEndPos); c=?6`m,"M } z?VjlA(X output.close(); YwZx{%f } 4s'%BM-r- catch(IOException e){e.printStackTrace ();} L:?Ew9Lf catch(Exception e){e.printStackTrace ();} /[/{m ] } *}Gys/\!S S9nn^vsK UA]T7r@ //读取保存的下载信息(文件指针位置) 1=9GV+`n private void read_nPos()
}hm_Ws { Z!fbc#L6
try{ ypemp=+(r DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); -`z%<)!Y int nCount = input.readInt(); >o`+j$j nStartPos = new long[nCount]; U H+#Nel+! nEndPos = new long[nCount]; L})*ck for(int i=0;i<nStartPos.length;i++) x;} 25A| { _(~E8g nStartPos = input.readLong(); UmMu|` nEndPos = input.readLong(); *V+,X } xC0y2+)| input.close(); ea`6J } ,z`D}<3 catch(IOException e){e.printStackTrace ();} kSCpr0c catch(Exception e){e.printStackTrace ();} &%)F5PT } vd$>nJ" 4m=0e B`3z(a92S private void processErrorCode(int nErrorCode) M0)0~#?.D { 2>9..c System.err.println("Error Code : " + nErrorCode); FjiIB1
T } SfrM|o h -091N 8I#^qr5 //停止文件下载 Y,,Z47%
E public void siteStop() hcYqiM@8> { BXxJra/V bStop = true; xb9^WvV for(int i=0;i<nStartPos.length;i++) (Nd)$Oq[4 fileSplitterFetch.splitterStop(); K)[\IJJM kVt/Hhd9 <HS{A$] } =`N 0 } Buq(L6P9r //负责部分文件的抓取 E KN<KnU% **FileSplitterFetch.java ]-a/)8 */ ~q/~ u package NetFox; kJNg>SN*@# ni )G C{G=Y[?oc import java.io.*; -{z[.v.p import java.net.*; 'IVC!uL,% 0@EI@X;q k.)YFKi public class FileSplitterFetch extends Thread { 'dzbeTJD5 $rbr&TJ T?jN/}qg String sURL; //File URL Eg2jexl long nStartPos; //File Snippet Start Position )S`Yl;oL long nEndPos; //File Snippet End Position v"%>ms"n int nThreadID; //Thread's ID r9b(d] boolean bDownOver = false; //Downing is over Q[H4l({E boolean bStop = false; //Stop identical s,/C^E FileAccessI fileAccessI = null; //File Access interface O ]-8 % K *1]P ar; 4"iI3y~Gw public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException *r9D+}Y(4 { At[SkG}b this.sURL = sURL; 9o P this.nStartPos = nStart; "qZTgCOY2 this.nEndPos = nEnd; FLkZZ\ nThreadID = id; I.~=\%Z{ fileAccessI = new FileAccessI(sName,nStartPos);//定位 ,qV 7$u } b`DPlQHj )u]=^ ZdPqU\G^q public void run() _ogN
{ + ~,q"6 while(nStartPos < nEndPos && !bStop) \FCPD.2s+ { i/!KUbt JP
;SO b{x/V 9&| try{ /Zx"BSu URL url = new URL(sURL); SymlirL HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); _pvt,pW httpConnection.setRequestProperty("User-Agent","NetFox"); L/GVQjb String sProperty = "bytes="+nStartPos+"-"; 8)Vl2z httpConnection.setRequestProperty("RANGE",sProperty); qAlX#] Utility.log(sProperty); HB.:/5\ -sDl[ A5%Now;.cf InputStream input = httpConnection.getInputStream(); Dd,
&a //logResponseHead(httpConnection); XI`s M~' B_8JwMJu3
y0) mBCX byte[] b = new byte[1024]; P~x4h{~Gd int nRead; Zk|PQfi+ while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) )`gxaT>&l { H3iYE~^# nStartPos += fileAccessI.write(b,0,nRead); KMl3`+i //if(nThreadID == 1) 9>&p:+D // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); t)O]0)
s } 'b >3:& 3{ea~G)[9 I-kK^_0mV< Utility.log("Thread " + nThreadID + " is over!");
j~9Y0jz_ bDownOver = true; }y(cv}8Y //nPos = fileAccessI.write (b,0,nRead); c0X1})q$ } c2s73iz catch(Exception e){e.printStackTrace ();} o(D_ /]'8 } 20Jlf?
} L$, Kdpj cmd7-2 W~l.feW$i //打印回应的头信息 #0^a-47PA< public void logResponseHead(HttpURLConnection con) N?A}WW# { K,P`V
&m? for(int i=1;;i++) C&EA@U5X^ { AnZy
oa String header=con.getHeaderFieldKey(i); ~~p )_ if(header!=null) }<'ki
; //responseHeaders.put(header,httpConnection.getHeaderField(header)); tv]9n8v Utility.log(header+" : "+con.getHeaderField(header)); {8%KO1xB else HuN_$aP break; oIE3`\xS } 9c0 } R-4#y%k< Vy=+G~ 7MKZ*f@x; public void splitterStop() \,!Qo*vj { IRv/[|"L bStop = true; Ca/N'|}^ } ]4lC/&nm {9Q**U`w - xyY6bxL } ybIqn0&[ Udjn.D YCdtf7P=q /* Tg=P*HY6 **FileAccess.java yhnPS4DC *//文件访问(定位,写) x69RQ+Vw package NetFox; l @E
{K| import java.io.*; fP\*5|7%R -BwZ T w1&<S public class FileAccessI implements Serializable{ :j32 :/u f]Rh<N$ //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 >LVGNicQ RandomAccessFile oSavedFile; 3A! |M5 long nPos; LMp^]*)t 19Mu}.+; .lSoC`HE public FileAccessI() throws IOException YYe=E,q { -V'Y^Df this("",0); |#(y?! A^ } cCG!X%9 7eFFKl ^=gN >xP public FileAccessI(String sName,long nPos) throws IOException _+Pz~_+kS { 'PTQ
S,E oSavedFile = new RandomAccessFile(sName,"rw"); 2f rwU~y this.nPos = nPos; Ju"c!vu~ oSavedFile.seek(nPos); @ykl:K%ke } Nr*o
RYY V'K:52 +Je%8jH public synchronized int write(byte[] b,int nStart,int nLen) fUq
#mkq} { h5v=h>c int n = -1; .W\x{h try{ PM)nw;nS oSavedFile.write(b,nStart,nLen); gBXoEn] n = nLen; {!1RlW } e=[@HVr catch(IOException e) hN\Q&F! { xo!2GPD. e.printStackTrace (); Y7')~C`up^ } `"#hhKG 12tAx3p IGA4"\s return n; n3\~H9 } q{xF7}i
JL7;l0# Y/L*0M.< } 'sa>G c?Mbyay +u`4@~D# /* X7*fmD=Uy **SiteInfoBean.java =9:gW5F69 */ Jpn= ^f[rm package NetFox; 8RcLs1n/ J(9{P/ 2~yj
=D27Z public class SiteInfoBean { P<LmCYm CFu^i|7o $qR@;= private String sSiteURL; //Site's URL }>b@=5O private String sFilePath; //Saved File's Path wVF
qkJ private String sFileName; //Saved File's Name LMLrH. private int nSplitter; //Count of Splited Downloading File 1c*;Lr.K u Vo"_c w Q&w"!N public SiteInfoBean() l.BiE<& {//nSplitter的缺省值为5
c^z)[ //default value of nSplitter is 5 qu;$I'Ul% this("","","",5); C4
-y%W"P } `yC[Fn"E^ HNLr}
Y j ~1nKL0C6u public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) FyNm1QNy^ { x-b}S1@ sSiteURL= sURL; @yF>=5z: sFilePath = sPath; blkPsp)m" sFileName = sName; m\MI 6/ this.nSplitter = nSpiltter; 3XDuo|( 1aPFpo! AN)r(86L } u>*qDr*d ^AoX|R[1% eZ
7Atuv public String getSSiteURL() (g1Op~EM { G[{Av5g mx return sSiteURL; vTC{ } 6;(b-Dhi #JN4K>_4 i\x@s>@x} public void setSSiteURL(String value) xWM?E1@ { n"@){:{4? sSiteURL = value; h+j*vX/! } & u6ydN1xe KWM}VZY:Z 7R,;/3wWjG public String getSFilePath() Uz%ynH { Zu94dFP return sFilePath; i9T<(sdK+ } 35:RsL zT93Sb d?V/V'T[ public void setSFilePath(String value) ^UFNds'q {
{~XAg~ sFilePath = value; VLoRS) } $UpWlYwG aq#F 0IBQE public String getSFileName() UUF]45t> { C
u1G8t- return sFileName; B;2#Sa. } KDj/S-S 86a,J3C[ BnaI30- public void setSFileName(String value) ;J:* r0 { $f>(TW sFileName = value; q(Ow:3& } *w}r:04F $'yWg_( vI:_bkii public int getNSplitter() !>/J]/4> { i(V return nSplitter; !/X>k{ } \S{ihS@J at1oxmy uuL(BUGt- public void setNSplitter(int nCount) a %?v/Ku { q d:"LS nSplitter = nCount; 4JXJ0T ar } z0F55<i } nswhYSX !_W']Crb]] -#R63f& /* 2-@t,T **Utility.java ;Zn&Nc7 */ !sYZ1;WAO package NetFox;
:z6? +]0hSpZ"p }9FWtXAU^1 public class Utility { D[4%CQ1m K??jV&Xor ?~cO\(TY[" public Utility() ezri9\Ju { {\|XuCF# fuWAw^& vFeR)Ox's } GH&5m44 *xpPD\{k //线程睡眠 ~RZN+N public static void sleep(int nSecond) nP|ah~
q { ngk:q5Tp try{ ^ (J%)&_\3 Thread.sleep(nSecond); Nz%pl! } J|HV8 catch(Exception e) B[2t.d;h { N
x^JC_ e.printStackTrace (); E,ooD3$h } i+lq:St } G;USVF-'K 0T0I<t //日志 K1-RJj\L public static void log(String sMsg) -iFFXESVX { *z_`$Y System.err.println(sMsg); 17w{hK4o8O } u=E &jL5U Ec }9R3 m qoW$Iw*q)B public static void log(int sMsg) A;f)`i0l, { %CgmZTz~< System.err.println(sMsg); <TSps!(# } !>&G+R+k } J%fJF//U a
FWTm,) [g{fz3
O6 /* >)mF'w **TestMethod.java KvI/!hl\ */ "cbJ{ G1pk package NetFox; ?DnQU"_$ ~bis!(}p- v[?gM.SF public class TestMethod { 9<"F3F0| Urksj:N nFro#qx public TestMethod() $jBi~QqOf { ///xx/weblogic60b2_win.exe {xP-p"?p try{ =c]We:I SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); i?)bF!J //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); D>`{f4Y SiteFileFetch fileFetch = new SiteFileFetch(bean); f<R
3ND) fileFetch.start(); b>d]= u } kHQn'r6 catch(Exception e){e.printStackTrace ();} WMFn#.aY5 w[G-=>; ZT,auSX } PAVlZ}kj +LF=oM< ]n$ v ^ public static void main(String[] args) 5cl^:Ua { h-o;vC9fC new TestMethod(); e"Z,!Q^-L } kpk ^Uw%f } v~p?YYOm< 点击下载更多相关资料
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