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/* %P,^}h7 **SiteFileFetch.java U2lC !j%K */ @M^QhHs package NetFox; bvS\P!m\c import java.io.*; C,vc
aC? import java.net.*; ,<r 3Z$G "sX?wTag SJ7=<y}[d public class SiteFileFetch extends Thread { <?Izfl6 ~<[5uZIo KqUSTR1e[ SiteInfoBean siteInfoBean = null; //文件信息Bean @/NZ>. long[] nStartPos; //开始位置 i=H>D long[] nEndPos; //结束位置 H6S vU FileSplitterFetch[] fileSplitterFetch; //子线程对象 :42;c:8 5 long nFileLength; //文件长度 Mqf}Aiqk; boolean bFirst = true; //是否第一次取文件 SH$cn,3F8 boolean bStop = false; //停止标志 `oRs-,d|< File tmpFile; //文件下载的临时信息 8yz((?LrDh DataOutputStream output; //输出到文件的输出流 &|"I0|tJ wK`ieHmp //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) R6Z}/ m public SiteFileFetch(SiteInfoBean bean) throws IOException Is6 _ { ~2DV{dyj siteInfoBean = bean; a;T[%'in //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); MGKeD+=5 tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); 2$W,R/CLh if(tmpFile.exists ()) 8Pr7aT:, { n9fA!Wic bFirst = false; fy>And* read_nPos(); iA{jKk= } r5da/*G/O else ~G:2iSi(# { v[DbhIXU nStartPos = new long[bean.getNSplitter()]; 8|qB1fB nEndPos = new long[bean.getNSplitter()]; C5PBfn<j } 6 %k+0\d :`^3MMLO Cm<j*Cnl S}Y|s]6 } ^zPEAXm (yAvDyJOn #Q7x:,f public void run() "~2#!bK7 { )Z]y.W ) //获得文件长度 6?.pKFBZ //分割文件 DcR}pQ(e //实例FileSplitterFetch 5h=TV //启动FileSplitterFetch线程 <6O_t,K] //等待子线程返回 >aC\_Mc try{ kxqc6 if(bFirst) tvH\iS #V { D<3V#Opw nFileLength = getFileSize(); xm,`4WdG if(nFileLength == -1) V;hwAQbF { eGSp(o5 6 System.err.println("File Length is not known!"); Z*9]:dG:! } :Ip:sRz else if(nFileLength == -2) jM1%6 { 69j~?w)^ System.err.println("File is not access!"); &<|-> *v } XZdr`$z f else u6Qf*_- K { oSA*~ N: for(int i=0;i<nStartPos.length;i++) b801OF { V>j hGf nStartPos = (long)(i*(nFileLength/nStartPos.length)); PSf5p\<5 } 71/ m.w for(int i=0;i<nEndPos.length-1;i++) LQ(5D_yG. { 'uf\.F nEndPos = nStartPos[i+1]; |*c\6 : } o|;eMO- nEndPos[nEndPos.length-1] = nFileLength; =Wk/q_. } ^g-t#O lD? } KA-/k@1& J1]w*2 =e!l=d|/ //启动子线程 )dIfr fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; _:Jp*z for(int i=0;i<nStartPos.length;i++) 71.\`' { {pb9UUP2 fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), H&=n:'k^ siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), sL AuR nStartPos,nEndPos,i); k8
;uC~L Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); ;64mf` fileSplitterFetch.start(); 4]aiT8)) } Z 5)_B,E:X // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), ,c%K)KuPK. siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); Vl 19Md // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", 95^i/6Gl!P nEndPos = " + nFileLength); Gkv~e?Kc~^ // fileSplitterFetch[nPos.length-1].start(); VwOG?5W/ puS&S
* m
UWkb //等待子线程结束 hP1
l v7P //int count = 0; B?#k W!wj //是否结束while循环 M,t*nG boolean breakWhile = false; C3\E.u? "7yNKO;W [l':G ] while(!bStop) y5/'!L)g { ^6aS]t write_nPos(); *K,hrpYR Utility.sleep(500);
$' (QTEM breakWhile = true; ! FR%QGn1 4g7ja MZ5Y\-nq\ for(int i=0;i<nStartPos.length;i++) 6
tc:A5mK { -!|WZ if(!fileSplitterFetch.bDownOver) :GQIlA8cF$ { .5Knb c breakWhile = false; zRV!(Y break; nJleef9 } ] dHB} } ^.D}k if(breakWhile) Lvi[*une| break; ^IVe[P' ;n}
>C' : (rr}Pv%yb //count++; Ts(t:^
//if(count>4) j1puB // siteStop(); 3duG.iUlL } zUs~V`0 l@N;sI<O- OQ(D5GR:4 System.err.println("文件下载结束!"); \9] I#Ih}M } X%GD0h]X# catch(Exception e){e.printStackTrace ();} \T`["< } .73zik hhpv\1h# G [3k //获得文件长度 F<Hqo>G public long getFileSize() 4L5o\'X { ieo|%N{' int nFileLength = -1; Z&FkLww try{ x"
'KW
( URL url = new URL(siteInfoBean.getSSiteURL()); [IX*sr HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); wfxOx$]zK httpConnection.setRequestProperty("User-Agent","NetFox"); X"[dQ_o k7^R,.c@ 'ySljo*It int responseCode=httpConnection.getResponseCode(); ~n[b^b
if(responseCode>=400) ?wd|G4.Vo { I?a8h`WS+ processErrorCode(responseCode); >[ ug
zJ return -2; //-2 represent access is error v@8S5KJ } L
42|>%uo _+twqi ch@x]@-;A3 String sHeader; G HD^%)T5^ |l|_dn 9W*.lf for(int i=1;;i++) fokwW}>B[f { fyI_ //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); D@8jGcz62 //Utility.log(in.readLine()); b'velj3A sHeader=httpConnection.getHeaderFieldKey(i);
RT%x&j if(sHeader!=null) V:
^JC>6 { \\jIl3Z if(sHeader.equals("Content-Length")) ;rd6ko { ~~PgF"v nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); M@|w[ydQG break; U~aWG\h#X } 3p=vz' } rdO@X9z else ' _B_&is break; ]o-Fi$h! } Kb}MF9?:e } K~c^*;F catch(IOException e){e.printStackTrace ();} 6Wj@r!u catch(Exception e){e.printStackTrace ();} U1l0Uke fr+@HUOxsl xXF2"+ Utility.log(nFileLength); (NX)oP ajW[eyX nV'3sUvR# return nFileLength; [#p&D~Du& } Bi]D{m9 ?>sQF4 V" Bwjg#1 E //保存下载信息(文件指针位置) $^t<9"t private void write_nPos() ,Ij=b { #wF1 try{ O -G1})$ output = new DataOutputStream(new FileOutputStream(tmpFile)); )S^z+3p output.writeInt(nStartPos.length); J"-_{)0lD for(int i=0;i<nStartPos.length;i++) R1}IeeZO?& { sltk@ // output.writeLong(nPos); Nz~(+pVWg5 output.writeLong(fileSplitterFetch.nStartPos); OR]T`meO output.writeLong(fileSplitterFetch.nEndPos); )o{VmXe@@ } yVaU t_Zi output.close(); hp*<x4%*a" } t\8&*(&3F catch(IOException e){e.printStackTrace ();} C1d
04Q catch(Exception e){e.printStackTrace ();} 'Q5&5UrBr } c4\C[$ ,'~#Ch 8Jr1_a //读取保存的下载信息(文件指针位置) ?0{yq>fTu private void read_nPos() i^WIr h3a { U
IfH*6X try{ V]rhVMA DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); ?w*yW;V` int nCount = input.readInt(); ~ FGe~ nStartPos = new long[nCount]; 1] j^d nEndPos = new long[nCount]; > @+# for(int i=0;i<nStartPos.length;i++) a5a1'IVq { !i^]UN nStartPos = input.readLong(); }qAVN nEndPos = input.readLong(); L1wZU, o } P.cO6+jGR input.close(); H'EY)s Hi } ZRnL_z~ catch(IOException e){e.printStackTrace ();} w:}C8WKw catch(Exception e){e.printStackTrace ();} 3qtr9NI } vf<UBa;Xm M ?*Tf& 34ha26\np private void processErrorCode(int nErrorCode) vIVr@1S { ^_68]l= System.err.println("Error Code : " + nErrorCode); O+_N!/ } ZHCr2^w6
Q[uAIyv0 Ea4_Qmn //停止文件下载 If;R?j0;Q public void siteStop() 4O(@'#LLz { r,4lqar;E bStop = true; OEnDsIhq for(int i=0;i<nStartPos.length;i++) W5.Va. fileSplitterFetch.splitterStop(); dAL3. % ! RPb|1Y}+ 9${Xer' } n_P3\Y| } qaG# ; //负责部分文件的抓取
%H& ].47 **FileSplitterFetch.java V@% */ %&+TbDE+T package NetFox; E"#Xc@ .%'Z~|K4 4PWAGuN^ import java.io.*; @A{m5h import java.net.*; j)Y[4 ^k^ gRAC d&) ` H
XEZ| public class FileSplitterFetch extends Thread { e3v5,. vc8?I."? ong""K4H String sURL; //File URL 3?.1nGu long nStartPos; //File Snippet Start Position s]H^wrg& long nEndPos; //File Snippet End Position xx }GOY.J int nThreadID; //Thread's ID G 4qy*. boolean bDownOver = false; //Downing is over fxgU~' boolean bStop = false; //Stop identical \G>ZkgU FileAccessI fileAccessI = null; //File Access interface iY~rne"l O4L#jBa+ m!O;>D public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException Yp1bH+/u { gcf6\f}\< this.sURL = sURL; Dx-KMiQ,"( this.nStartPos = nStart; q+ pOrGh this.nEndPos = nEnd; U>P|X=) nThreadID = id; zN{JJ3- fileAccessI = new FileAccessI(sName,nStartPos);//定位 R J~%0 } >o~Z>lr O'$K],=BS L9FHgl? public void run() M T6/2d { (UYF%MA}" while(nStartPos < nEndPos && !bStop) Qx)Jtb0`V { ]]BOk <G~>~L.E PB53myDQ try{ g=l:cVr8y URL url = new URL(sURL); p $ouh HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); lA^+Flh httpConnection.setRequestProperty("User-Agent","NetFox"); 1J}8sG2` String sProperty = "bytes="+nStartPos+"-"; y(a!YicA? httpConnection.setRequestProperty("RANGE",sProperty); eV7u*d? Utility.log(sProperty); ;%!B[+ut" wO.iKX; Q@-ovuxi InputStream input = httpConnection.getInputStream(); XK
ApLz //logResponseHead(httpConnection); >cN~U3 VDGCWg6z "i&"* ~ byte[] b = new byte[1024]; u~1o(Zn
= int nRead; P0Z!?`e=M while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop)
Zy0aJN> { +4qU> nStartPos += fileAccessI.write(b,0,nRead); ZA(T
//if(nThreadID == 1) :I1_X // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); \or G63T: } .*YD&( ?okx<'"[ jS<_ ) Utility.log("Thread " + nThreadID + " is over!"); tPfFqqT bDownOver = true; ]zfG~^. //nPos = fileAccessI.write (b,0,nRead); 7~1IO|4t } Vj?DA5W`' catch(Exception e){e.printStackTrace ();} +&|S'7&{ } xV\5<7qk5g } $uDqqG(^ TDt Amk nFRsc'VT //打印回应的头信息 :5fAPK2r< public void logResponseHead(HttpURLConnection con) l2jF#<S@ { ihCIh6 for(int i=1;;i++) 58V[mlW)O0 { nBItO~l String header=con.getHeaderFieldKey(i); XORk!m| if(header!=null) 51BlM% //responseHeaders.put(header,httpConnection.getHeaderField(header)); H1EDMhn/ Utility.log(header+" : "+con.getHeaderField(header)); "v-(g9( else !j:`7PT\ break; ^W?Z } h8e757z } w5=tlb PVOx`<ng 3)=c]@N0 public void splitterStop() u3 0s_\ { 28.~iw bStop = true; 3AcD,,M>> } eqAW+Ptx q'Wr[A40j >rsqH+oL } !g!5_| qJ4T]FVN `D$Jv N /* 9W ^xlid6 **FileAccess.java ~|ss*`CT *//文件访问(定位,写) "=/ f$Xf package NetFox; _aWl]I){5 import java.io.*; ;)AfB#:d >slm$~rv hr05L<?H public class FileAccessI implements Serializable{
*f%>YxF Q]/Uq~m C //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 cD|Htt" RandomAccessFile oSavedFile; M<PIeKIEB long nPos; "KX=ow#z| IuF_M<d, Nes=;%&]G public FileAccessI() throws IOException W,^W^:m-x { j=?'4sF this("",0); SMH<'F7i } `Z"Q^ ?p<.Fv8.
uw(NG.4 public FileAccessI(String sName,long nPos) throws IOException &fa5laJb { `o]g~AKX oSavedFile = new RandomAccessFile(sName,"rw"); #|GSQJ$F)` this.nPos = nPos; e= vsuqGT oSavedFile.seek(nPos); eB>s=}| } ew _-Eb ?<Wb@6kh` r}#\BbCv;7 public synchronized int write(byte[] b,int nStart,int nLen) z!;1i[|x { BVsD(
@lX int n = -1; fA/m1bYxg try{ (Rt7%{* oSavedFile.write(b,nStart,nLen); o2z]dTJ}o n = nLen; [u}(57DS } 7\]E~/g catch(IOException e) 7/7Z` { sg'pO*_& e.printStackTrace (); <@wj7\pQ } L( T12s <JMcIV837 bV8g|l-4( return n; 40E#JF# } k>x&Ip8p &k-Vcrcz wNFz*|n } H{J'#
9H g~V+4+ qd3Q}Lk /* No]~jnqDM **SiteInfoBean.java o<IAeH {+ */ (C4fG@n package NetFox; Lip4)Y [ ,p(<+6QZ 76hOB@ public class SiteInfoBean { 3rLTF\ `w I /0 !Z
VU,b> private String sSiteURL; //Site's URL _iNq"8>2 private String sFilePath; //Saved File's Path ~{sG| ;/!* private String sFileName; //Saved File's Name !EUan private int nSplitter; //Count of Splited Downloading File lj+u@Z<xA W>-Et7&2 w 4[{2 public SiteInfoBean() oh#\]c\f {//nSplitter的缺省值为5 4DZ-bt' //default value of nSplitter is 5 *5 w{8 this("","","",5); 4_Dp+^JF } ()&~@1U ^B8b%'\ CLvX!O(~ public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) {uzf"%VtP { pTIf@n6I sSiteURL= sURL; )95f*wte sFilePath = sPath; `+6R0Ch sFileName = sName; W9NX=gE4 this.nSplitter = nSpiltter; *CHI2MB rE@T79" =zQN[ } ;WR,eI.. Ft}@1w5 {s. = )0V public String getSSiteURL() w]N!S;<N { %|s+jeUDn| return sSiteURL; (vT+IZEI }
%iV^S!e boDt`2= %^RN#_ro(3 public void setSSiteURL(String value) ]_N|L|]M { 95el'K[R sSiteURL = value; )"Ztlhs`# } d!eYqM7-G 9on@Q_7m ~69&6C1Ch public String getSFilePath() )1X#*mCxk { P.gb1$7< return sFilePath; '7O3/GDK } Gea\,{E9xA 13taFVdU $Xq!L public void setSFilePath(String value) 6gc>X%d `K { ,v"YqD+GC5 sFilePath = value; x.-+[l[1
! } / m=HG^! -'6Dg yPq'( PV public String getSFileName() AK@9?_D { c/sC&i;%O return sFileName; | Bi! } G^ :C+/) l\i)$=d&g ;^Dpl'v%\ public void setSFileName(String value) gEjdN. { =>-Rnc@ sFileName = value; Mo^ od< } -B +4+&{T 0Vx.nUQ nr<4M0tIp public int getNSplitter() ]q4rlT.i { =E.wv
return nSplitter; @;"|@!l| } E>K!Vrh-L z<Nfm 7
qS""f7 public void setNSplitter(int nCount) -fDnA4; { AIZ]jq nSplitter = nCount; .[_L=_. } Rb'|EiNPw } c
Vc- |:gf lseE W)bLSL]`E /* Z.L c>7o **Utility.java E 7{U|\ */ ,y#Kv|R package NetFox; +L;e^#>d `x*Pof!Io A*\.NTM public class Utility { $&n=$C&x iUN Ib XuFYYx~ ^3 public Utility() ,0!}7;j_c { 'd9INz. #AJM6* G9 [MUpxOAsd } EFM5,gB.m ,
K~}\CR //线程睡眠 [DI+~F public static void sleep(int nSecond) "~|6tQLc { FOE4>zE try{ &OH={Au Thread.sleep(nSecond); W:pIPDx1=! } cQ
R]le%( catch(Exception e) N2;B-U F
7 { a.k.n< e.printStackTrace (); 0Qf,@^zL* } },{$*f[ } [M=7M}f; QTk}h_<u //日志 !$gR{XH$] public static void log(String sMsg) GjvOM y { N5lDS System.err.println(sMsg); I&x=; } 9y"@( i9,geQ7d p8Qk'F=h public static void log(int sMsg) fHx*e'eA { v dc\R? System.err.println(sMsg); ek*rp`y] } %]} } | ATvS2 +%h8r5o1 c(xrP/yOwi /* 286jI7 T **TestMethod.java ,l\-xSM */ L>Fa^jq5 package NetFox; 86=}ZGWd _-K2/6zy #lL^?|M public class TestMethod { UGV+/zxIM Yi%;|] KPKt^C public TestMethod() kTOzSiq { ///xx/weblogic60b2_win.exe lZ]ZDb?P try{ y51e%n$ SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); :!WHFB
o 8 //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); u}macKJmp\ SiteFileFetch fileFetch = new SiteFileFetch(bean); Z>k#n'm^z fileFetch.start(); yEqps3% } *av<E catch(Exception e){e.printStackTrace ();} E Nhl&J "jKY1*? -b9\=U[ } @=}0`bE SJn;{X>)q [}E='m}u9+ public static void main(String[] args)
M^=zt { On9A U:\ new TestMethod(); @k,#L`3^ } FXG]LoP } "c%0P"u 点击下载更多相关资料
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