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/* st36xS **SiteFileFetch.java ,)+O.Lf7&. */ gDnG!i+ package NetFox; n15c1=gs import java.io.*; EAFKf*K= import java.net.*; 57+^T}/> hD58 s"L$ 5}e-~- public class SiteFileFetch extends Thread { \@4QG.3& $ i@5'[jA ox {Cm SiteInfoBean siteInfoBean = null; //文件信息Bean {Z;W|w1t long[] nStartPos; //开始位置 Bd m<<< long[] nEndPos; //结束位置 u7`<m.\ FileSplitterFetch[] fileSplitterFetch; //子线程对象 <2y~7h: long nFileLength; //文件长度 >'^l>FPc boolean bFirst = true; //是否第一次取文件 I_xJ[ALdm boolean bStop = false; //停止标志 /S9Mu
)1Y File tmpFile; //文件下载的临时信息 N|q:wyS| DataOutputStream output; //输出到文件的输出流 |6\ ?"# @6.1EK0 //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) h bj^!0m public SiteFileFetch(SiteInfoBean bean) throws IOException ZvNXfC3Ia { T4Z("
siteInfoBean = bean; CT4R/wzY7 //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); wr*A%: tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); _?Jm.nT if(tmpFile.exists ()) -<&"geJA { oB3>0Pm*a. bFirst = false; wlKpHd* read_nPos(); txr!3-Ne'! } @]*z!>1 else SVXey?A;CJ { Tjure]wQz nStartPos = new long[bean.getNSplitter()]; 21 cB_" nEndPos = new long[bean.getNSplitter()]; ?vf{v } 2~h)'n7Mw e5fJN)+a biGaP#"0 X?rJO~5 } scL7PxJ5 N!RyncJ u[ 2R>= public void run() 9FK:lFGD { WF-imI:EK //获得文件长度 {LJCY<IGq //分割文件 f$V']dOj1q //实例FileSplitterFetch ZWf{!L,@Z //启动FileSplitterFetch线程 R52q6y:<x //等待子线程返回 :g<dwuVO try{ >YoK?e6 if(bFirst) !;CY
@= { ?WUE+(oH> nFileLength = getFileSize(); >)N,V;j if(nFileLength == -1) Y/Y746I { =#%e'\)a System.err.println("File Length is not known!"); m/Yi;>I( } 8Yq6I>@! else if(nFileLength == -2) E pM
4+ { [zf9UUc~ System.err.println("File is not access!"); >47,Hq:2 } N@)4H2_u \ else gWgK { <;9vwSH> for(int i=0;i<nStartPos.length;i++) +~FH'DsT { wm2Q(l*HH nStartPos = (long)(i*(nFileLength/nStartPos.length)); 8n~@Rj5 } wV56LW for(int i=0;i<nEndPos.length-1;i++)
mH?^3T { o'Tqqrr nEndPos = nStartPos[i+1]; i-E&Y*\^9H } Vp5qul% nEndPos[nEndPos.length-1] = nFileLength; fXL>L
} *QLl
jGe } $8it&/JP, fvNGGn! I[t)V*L9 //启动子线程 ,rX!V=Z5 fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; 2?-}(F;Z for(int i=0;i<nStartPos.length;i++) miN(a; Q2P { +oQ@E<)H fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), 3v0)oK siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), yx/:<^"-$ nStartPos,nEndPos,i); pM
VeUK? Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); 8KoPaq fileSplitterFetch.start(); >{GC@Cw } nh9K( // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), RI*Q-n{ siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); m5d;lrk@&/ // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", )XO2DY1/& nEndPos = " + nFileLength); $ h_ @`j // fileSplitterFetch[nPos.length-1].start(); Hh!x&;x} SZwfYY!ft0 _'j>xK //等待子线程结束 Q_uv.\*z_ //int count = 0; ,hOJe=u46 //是否结束while循环 VJr?`
eY4 boolean breakWhile = false; PVtQ&m$y @&M$`b
^ Lwv9oa| while(!bStop) j@9nX4Z { >J8?n,* write_nPos(); !4z"a@$ Utility.sleep(500); NWNgh/9? breakWhile = true; PiH#9XB T@Q.m.iV4 +Tu:zCv. for(int i=0;i<nStartPos.length;i++) +;>>c`{ { $rjv4e}7 if(!fileSplitterFetch.bDownOver) R`$Odplh> { has5"Bb breakWhile = false; s@3!G+ -} break; 45-pJf8F } +qS$t }
d;CD~s if(breakWhile) 7CQ48LH] break; TUk1h\.q E|^a7-}| #4"\\ //count++; \<z{@ //if(count>4) ul% q6=f) // siteStop(); +F0M?, } ,e,fOL zizrc.g/Yg a{u)~:/G System.err.println("文件下载结束!"); +*|E%pq } 6SidH_&C catch(Exception e){e.printStackTrace ();} fitm* } ?^@;8m FNm8j#c~Q (nV/-#* //获得文件长度 %OzxR9 public long getFileSize() S:R%%cy { b9\=NdyCY int nFileLength = -1; *?i~AXJm try{ ]AfeaU'> URL url = new URL(siteInfoBean.getSSiteURL()); e
j`lY HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); Ig9$ PP+3 httpConnection.setRequestProperty("User-Agent","NetFox"); w\\ &i!.6M2 %F{@DN` int responseCode=httpConnection.getResponseCode(); l5@k8tnz if(responseCode>=400) 5B@&]-'~ { Zo&U3b{Dy processErrorCode(responseCode); l[h??C` return -2; //-2 represent access is error sa*hoL18 } LL:B
H,[ jNB-FVaT Xt$?Kx_, String sHeader; Z?^AX&F q|Ga
GadD*psD2 for(int i=1;;i++) aFl(K\ { :KW //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); ~>qcV=F^d, //Utility.log(in.readLine()); G2e m>W_n sHeader=httpConnection.getHeaderFieldKey(i); Y%Saz+ if(sHeader!=null) 3 i>uKU1 { tF=96u_X if(sHeader.equals("Content-Length")) _\u'~wWl { aA\v
nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); T@f$w/15 break; X\flx~ } [Si`pPvl } 7@06x+! else <.:B .k break; jg 2>=} } H'2pmwk } `qUmOFl catch(IOException e){e.printStackTrace ();} /y
NU0/ catch(Exception e){e.printStackTrace ();} k2O==IG]6 sx|=*j,_ ]Wfnpqc^ Utility.log(nFileLength); G0<m3 Up Nhuw8Xv ?HU(0Vgn' return nFileLength; a N_M } C'hZNFsF; ky[FNgQ3n DQwbr\xy\ //保存下载信息(文件指针位置) z+Y0Zh";/# private void write_nPos() ve'h z{W { \ocJJc9 try{ .`iOWCS output = new DataOutputStream(new FileOutputStream(tmpFile)); 3rOv j&2 output.writeInt(nStartPos.length); OBu$T& for(int i=0;i<nStartPos.length;i++) 4R}2H>VV% { -R|v&h%T // output.writeLong(nPos); (i&:=Bfn) output.writeLong(fileSplitterFetch.nStartPos); 5Vf#(r f output.writeLong(fileSplitterFetch.nEndPos); = q;ACW,z } 1[mX_ }K output.close(); ~
M@8O } .y|* catch(IOException e){e.printStackTrace ();} o5A@U0c_ catch(Exception e){e.printStackTrace ();} rr9N(AoxW } C+jlIT+ 0<nk>o Pv/$;R% //读取保存的下载信息(文件指针位置) qK,rT*5= private void read_nPos() X`#vH8 { '\=aSZVO try{ AvH^9zEE( DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); >pUR>?t" int nCount = input.readInt(); :[,-wZiT~6 nStartPos = new long[nCount]; 8FU8E2zo nEndPos = new long[nCount]; XeJn,= for(int i=0;i<nStartPos.length;i++) MBp%TX! { <Y9e n!3\ nStartPos = input.readLong(); RMDzPda. nEndPos = input.readLong(); G[ @RZ~o4 } yIA-+# r[ input.close(); sA#}0>`3S } <D%.'=%pZ catch(IOException e){e.printStackTrace ();} ?
0p_/mZ catch(Exception e){e.printStackTrace ();} &M&*3 } k`_sKr]9 )pbsvR_ fl9`Mgu private void processErrorCode(int nErrorCode) O,x[6P54P { W 2&o'(P\ System.err.println("Error Code : " + nErrorCode); F}wy7s2i } _h6SW2:z!E e
^2n58 whxTCI V //停止文件下载 g1Ed:V]_ public void siteStop() TD!--l*gL { F2QFQX(j bStop = true; )[+82~F for(int i=0;i<nStartPos.length;i++) J;|a)Nw fileSplitterFetch.splitterStop(); GRM6H|. m}hEi T\?$7$/V } ,)@njC?J } E2K{9@i //负责部分文件的抓取 ]l>LU2 sx **FileSplitterFetch.java ~t^
Umx"Ew */ dhv?36uE package NetFox; '
Dcj\=8 ti'B}bH>' =h0vdi%{ import java.io.*; EMQGP<[ import java.net.*; 0Q?)?8_ 4P jC[A* 0xVw{k}1U public class FileSplitterFetch extends Thread { 0v+-yEkw ' Dp;fEU$ }C4wED. String sURL; //File URL U}@xMt8@l long nStartPos; //File Snippet Start Position txE=AOY5 long nEndPos; //File Snippet End Position _Ne fzZWUJ int nThreadID; //Thread's ID 6S`0<Z;;/ boolean bDownOver = false; //Downing is over jaw&[f
7 boolean bStop = false; //Stop identical ~=va<%{
U FileAccessI fileAccessI = null; //File Access interface 7-:R{&3Lm: @,Z0u2WLl6 d|?Xo\+ public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException ;3x*pjLG:Q { {Y-~7@ this.sURL = sURL; NNt
n this.nStartPos = nStart; J0V`sK this.nEndPos = nEnd; v5>A1\ nThreadID = id; vAp<Muj(a fileAccessI = new FileAccessI(sName,nStartPos);//定位 Z_Wzm!: } m8@&-,T vd?Bk_d9k, n{u\t+f public void run() jr,N+K(@T { b9-IrR4h while(nStartPos < nEndPos && !bStop) E\|nP~;~F9 { I4W@t4bZ o^XDG^35` U%q-#^A try{ ^M{,{bG URL url = new URL(sURL); #x;,RPw5 HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); >H^#!eaqw httpConnection.setRequestProperty("User-Agent","NetFox"); ~)^'5^ String sProperty = "bytes="+nStartPos+"-"; ,AmwsXN"F httpConnection.setRequestProperty("RANGE",sProperty); 0j_kK Utility.log(sProperty); Z\?2"4H AtewC
Yo s$).Z(6 InputStream input = httpConnection.getInputStream(); g5
T //logResponseHead(httpConnection); @/F61Ut H4s~=iB XeX"IhgS>E byte[] b = new byte[1024]; 4qdoF_ int nRead; H1I^Vij while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) T]ls&cW5 { baBBn%_V nStartPos += fileAccessI.write(b,0,nRead); 2 /FQ;<L //if(nThreadID == 1) V\o7KF // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); zw['hqW } T]\c2U B2e" AH|gI2 Utility.log("Thread " + nThreadID + " is over!"); <XIIT-b[ bDownOver = true; @(Y!$><Is //nPos = fileAccessI.write (b,0,nRead); #0>xa]S } VGmvfhf#" catch(Exception e){e.printStackTrace ();} nq)F$@ } K#YQB3rX } )P$|9<_q7x z$e6T&u5B &)Xc'RQ.C //打印回应的头信息 MF8-q'upyT public void logResponseHead(HttpURLConnection con) EHk\Q\ { ;$QC_l''b for(int i=1;;i++) f<NR6],} { |M7cB$y String header=con.getHeaderFieldKey(i); ]3rVULU"K- if(header!=null) j-":>}oW2. //responseHeaders.put(header,httpConnection.getHeaderField(header)); q0iJy@?A Utility.log(header+" : "+con.getHeaderField(header)); 1@DC#2hPr else fbNzRXw break; eXW|{asx } 64<;6* } <eoie6@3 (k?HT'3) );$99t public void splitterStop() ){*+s RBW { z3Q&O$5\ bStop = true; wT4@X[5$ } :OG I|[ )th[fUC( )S
caT1I } <h/%jM>9/ f8Iddm# >Icr4?zq /* xG9Sk **FileAccess.java i"WYcF| *//文件访问(定位,写) ~SnUnNDm ` package NetFox; /ad9Q~nJ import java.io.*; =l/6-j^ pk :P;\ K#0TD(" public class FileAccessI implements Serializable{ g8W,Xq+ ;2p+i/sVj //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 j3gDGw; RandomAccessFile oSavedFile; qN $t_ long nPos; #c^V% Y;"k5+ q 9}(w*>_L public FileAccessI() throws IOException 'X^auyL { aD^$v this("",0); eU[g@Pq:Y } b:m+I
CM;b_E)9)f K~N$s"Qx public FileAccessI(String sName,long nPos) throws IOException ]~({;;3o- { ,NSf oSavedFile = new RandomAccessFile(sName,"rw"); UB/> Ro this.nPos = nPos; ?sf<cFF oSavedFile.seek(nPos); KdkA@>L!; } Gv:~P_vBH[ Zxa.x?:?n g7 \= public synchronized int write(byte[] b,int nStart,int nLen) |$RNY``J { lQn"
6o1 int n = -1; {.p.? try{ "
kDiK`i oSavedFile.write(b,nStart,nLen); YX\vk/[| n = nLen; &Y]':gJ } r|Ui1f5 catch(IOException e) 0MG>77 { w;z7vN~/O e.printStackTrace (); (|gQ
i{8 } ag-A}k>v =>jp\A
is'V%q return n; dftBD } Shm> r@C? kv+% ]Bhy=1 } 6Sr]<I +: "y1Iu j4.wd
RK /* ,,H "?VO **SiteInfoBean.java
g^ AQBF */ ~zVxprEf_ package NetFox; I6>J.6luF9 p_FM 2K7! J K
k0f9) public class SiteInfoBean { bc)>h!'Y $[gN#QW% IGlR,tw_/ private String sSiteURL; //Site's URL )!T~l(g private String sFilePath; //Saved File's Path |Splbsk private String sFileName; //Saved File's Name $ghZ<Y2}9 private int nSplitter; //Count of Splited Downloading File g3R(,IH Ve,g9 I ZN[<=w&(cB public SiteInfoBean() I \:WD" {//nSplitter的缺省值为5 :^;c(>u{ //default value of nSplitter is 5 }z3j7I this("","","",5); V%Uj\cv }
bGRt i?00!t K_7pr~D]@r public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) F3tps
jQ { %)ho<z:7U sSiteURL= sURL; dG\wW@}J sFilePath = sPath; -yqsJGY sFileName = sName; @u~S!(7.Wi this.nSplitter = nSpiltter; 2*#|t: (c 8|u4xf< HU3:6R& } aZfMeW rzjVUPdnh 'ofj1%c public String getSSiteURL() n3^(y"q { Z8$}Rpo return sSiteURL; 5]xuU.w' } d,<ni" %,>z`D,Hg P4zo[R%4 public void setSSiteURL(String value) lu8G$EQI { u9lZHh#V- sSiteURL = value; kfy!T rf } 4S_ -9&z 1{}p_"s> Jt~Ivn, public String getSFilePath() \Mf>X\} { #&3,T1i` return sFilePath; @[GV0*yz$ } uuzV,q ?gH[la KA3U W public void setSFilePath(String value) \pmS*Dt { N Ob`)qb sFilePath = value; TBlSZZ-55] } rhv~H"qzW Di9RRHn&q bO~y=Pa\ public String getSFileName() @]\fO)\f { Fs+tcr/\[ return sFileName; $d?+\r:I{, } oXPA<ef o %mI0*YRma 'Zx5+rM${} public void setSFileName(String value) [4)Oi-_Y> { t,/ G sFileName = value; Q>niJ'7WF } c*USA
eP xR7ZqTcw $vn6%M[ public int getNSplitter() pR0[qsQM { STKL return nSplitter; bcIae0LZ } 7ZcF0h lExQp2E KE?t?p public void setNSplitter(int nCount) %nA})nA7= { l#)X/(?; nSplitter = nCount; 2y[Q } *TOd Iq&z }
hfB$4s9 ^FCXcn9 "ra$x2|=} /* >e]g T **Utility.java R2bq hSlF */ jNZ.Fb package NetFox;
:e1h!G "N4^ ^~s K#"=*p, public class Utility { zzmC[,u} {v={q1 h>Kx public Utility() \Ne`9k { DE13x*2 # :+Nr 5epI'D } CEfqFn3^ 0KA*6]h t //线程睡眠 xC76jE4 public static void sleep(int nSecond) S
?Zh#`(* { <JPN<
Kv try{ .1QGNW Thread.sleep(nSecond); pn" !wqg } 8}%F`=Y0 catch(Exception e) <,vIN,Kl8/ { )"x6V""Rb e.printStackTrace (); 5Ds[? } I| TNo-!$ } r[9m-#)> 7H
H //日志 2mY!gVi public static void log(String sMsg) HZrA}|:h { y6 (L=$+B System.err.println(sMsg); d<c 29Y } U1\EwBK8*T q ` S
~w hY}Q|-| public static void log(int sMsg) EKc<|e,F { '1u?-2 System.err.println(sMsg); KGt: } 74e=zW? } XQ1]F{?/H XJul~"
Lg4|6.Ez|P /* *F$@!ByV **TestMethod.java VuLb9Kn */ B>{%$@4 package NetFox; qI'pjTMDY =By@%ioIGG -jQ*r$iRE public class TestMethod { {lK2yi gUiO66#x a\sK{`|X* public TestMethod() PRfq_:xy { ///xx/weblogic60b2_win.exe Y S3~sA try{ :.PA(97xb SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); RO3LZBL //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); .AN1Yt SiteFileFetch fileFetch = new SiteFileFetch(bean); MqJTRBs% fileFetch.start(); ^y,h0?Z9 } ^f[6NYS? catch(Exception e){e.printStackTrace ();} eKLvBa-{@ xMbgBx4+ LhG\)>Y% }
$ (}rTm m.++nF j"Jf|Hq $ public static void main(String[] args) $f@YQN= { %9YY \a { new TestMethod(); XPhP1 ^>\ } }u#3 hYa } f y2vAwl 点击下载更多相关资料
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