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/* Fb\ E39 **SiteFileFetch.java 0Q!/A5z */ yGvBQ2kYb package NetFox; [K""6D import java.io.*; xt1Ug~5 import java.net.*; ,j e *IWWD\U )8*}-z public class SiteFileFetch extends Thread { p&k%d, * XNQPyZ2@|b l-?#oy SiteInfoBean siteInfoBean = null; //文件信息Bean g<g$c<sm long[] nStartPos; //开始位置 DLD 5> long[] nEndPos; //结束位置 JiFB<Q\ FileSplitterFetch[] fileSplitterFetch; //子线程对象 ErxvGB(2 long nFileLength; //文件长度 2U@:.S'K boolean bFirst = true; //是否第一次取文件 =buarxk boolean bStop = false; //停止标志 (CInt_dBw~ File tmpFile; //文件下载的临时信息 B,U|V DataOutputStream output; //输出到文件的输出流 qFN`pe, aW_Pv~ //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) g9@H4y6fe= public SiteFileFetch(SiteInfoBean bean) throws IOException gubw&W { {JQCfs siteInfoBean = bean; (Rh$0^)A //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); wWQt tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); mjKu\7F if(tmpFile.exists ()) qi$nG_<<Z { 5Zn: $?7 bFirst = false; 5QP`2I_n read_nPos(); 1|:'jK#gE } ^J'O8G$ else /Xl(>^|& { 17#t 7Yk nStartPos = new long[bean.getNSplitter()]; ^~^=$fz nEndPos = new long[bean.getNSplitter()]; 9D]bCi\ } 1>L8EImx]V kQD~v+u{` E8L\3V4 '0v]?mM } Hi nJ}MF |f1RhB sKC(xO@L;` public void run() Cd|rDa { XZT|ID_u" //获得文件长度 pgPm0+N
//分割文件 SB,#y>Zv? //实例FileSplitterFetch #j'7\SV //启动FileSplitterFetch线程 mFt\xGa //等待子线程返回 v%7Gh-P try{ L@.Trso if(bFirst) Y>x3`f] { .|0$?w nFileLength = getFileSize(); 08/Tk+ if(nFileLength == -1) }U?:al/m { U/ax`_ System.err.println("File Length is not known!"); V`@/"Dj j } +xQj-r)- else if(nFileLength == -2) `aSbGMz { 5t|$Yt[ System.err.println("File is not access!"); Zt}b}Bz } 8S5Q{[ ! else KQ0f2? { =.l>Uw! for(int i=0;i<nStartPos.length;i++) f8-~&N/_R { >7z(?nQYT^ nStartPos = (long)(i*(nFileLength/nStartPos.length)); qe/5'dw } S<z 8 for(int i=0;i<nEndPos.length-1;i++) &%tW { jOZ>^5} nEndPos = nStartPos[i+1]; SeuDJxqopD } m~4ik1wq nEndPos[nEndPos.length-1] = nFileLength; 3Xy~ap>Y } {\X$vaF } GK1P7Qy?V Jl|^^? _+Z5qUmQ //启动子线程 z\YLO%Mm fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; >1HXC2 Y for(int i=0;i<nStartPos.length;i++) uX6p^KNm5 { wbI1~/ fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), Q_dMuoI siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), 0IZF%` nStartPos,nEndPos,i); 5g.Kyj| Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); OTNI@jQ) fileSplitterFetch.start(); v^ v \6uEP } j%}9tM6[ // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), dF5y'
R' siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); /m i&7C(6 // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", &8I*N6p:%/ nEndPos = " + nFileLength); }PM7CZSq // fileSplitterFetch[nPos.length-1].start(); mQ9shdvt- bf.yA:~U 24wr=5p]Q //等待子线程结束 F+L%Ho;@P //int count = 0; `i+2YCk //是否结束while循环 '&$zgK9T? boolean breakWhile = false; FF0~i+5 /SyAjZ :B\$7+$v while(!bStop) -9Ygn_M { ?y__ Vrw write_nPos(); &VcO,7 A| Utility.sleep(500); LBmXy8'T` breakWhile = true; [)il_3t rq1zvuUx D(WV
k for(int i=0;i<nStartPos.length;i++) JIqg[Mao { @Kw&XK e` if(!fileSplitterFetch.bDownOver) m"6K_4r] { 1&vR7z]* breakWhile = false; tu/4 break; DghqSL^s } ):A.A,skf } [Dmf.PUe if(breakWhile) ",#Ug"|2 break; KC%&or o 9(x\g 8 qZbsZi4 //count++; (cV1Pmn //if(count>4) "KSdC8MS // siteStop(); /LtbmV } N/<c;"o q8,,[R_ J)|I/8!# System.err.println("文件下载结束!"); M@p<L
VP } G*~CB\K_ catch(Exception e){e.printStackTrace ();} +_QcLuV, } x<@i3Y{[ Dtyw]|L\H Q'?VLv|@ //获得文件长度 Ekh)l0
l public long getFileSize() t2|0no { JXR]G int nFileLength = -1; jl>wvY|| try{ !lA~;F URL url = new URL(siteInfoBean.getSSiteURL()); K@:Ab'(P^| HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); NzN"_o jM httpConnection.setRequestProperty("User-Agent","NetFox"); (]10Z8"fJ =WEDQ\ c Rm6i[y& int responseCode=httpConnection.getResponseCode(); ;Cjj_9e,: if(responseCode>=400) 3II*NANeg { =.JcIT'
processErrorCode(responseCode); @x;(yqOb return -2; //-2 represent access is error Fq%NY8KNE } Vs
Z7n~e 77wod}h!: j0 w@ \gO< String sHeader; ULs'oT)K; %;<g!Vw.k YkFERIa076 for(int i=1;;i++) Y##lFEt { Vock19P //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); BWB}bq //Utility.log(in.readLine()); )h{+pK sHeader=httpConnection.getHeaderFieldKey(i); /x_AWnU if(sHeader!=null) e-1G\}E { yL
-}E if(sHeader.equals("Content-Length")) [$:L|V!{ { xD sKb_ nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); u1d%wOY break; rhly.f7N=A } {+3g*s/HI } C}DIm&)) else e<FMeg7n break; z+CX$.Z } BN&}g}N } %?[0G,JG catch(IOException e){e.printStackTrace ();} ! CJ*zZ* catch(Exception e){e.printStackTrace ();} vo2GFo xO,;4uE c~OvoTF, Utility.log(nFileLength); 6s
~!B{Q kg,\l9AM 4^d).{&X return nFileLength; <s$T7Zk } wfcR[ tF./Jx]_ 6UL9+9[C //保存下载信息(文件指针位置) 9]1LwX!M2 private void write_nPos() (A=Z,ed { AN|f:259 try{ E\cX output = new DataOutputStream(new FileOutputStream(tmpFile));
o)DO[ output.writeInt(nStartPos.length); $jv"$0Fc for(int i=0;i<nStartPos.length;i++) ~`B]G { ra_v+HR7 // output.writeLong(nPos); _={mKKoHs output.writeLong(fileSplitterFetch.nStartPos); #v9+9X`1L output.writeLong(fileSplitterFetch.nEndPos); *Tr{a_{~C } QXl~a%lB output.close(); "pH;0[r] } Kxz|0l catch(IOException e){e.printStackTrace ();} rls{~ZRl catch(Exception e){e.printStackTrace ();} D]|{xK C} } D";clP05K 8s-X H peOoZdJd //读取保存的下载信息(文件指针位置) 9>`dB private void read_nPos() }m7$,'C%P { FP*kA_z$ try{ #TH(:I=[ DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); _9Rj, int nCount = input.readInt(); lIO#)> nStartPos = new long[nCount]; K]|hkp& nEndPos = new long[nCount]; {eQijW2Z3 for(int i=0;i<nStartPos.length;i++) ziM@@$.F { s'IB{lJ9 nStartPos = input.readLong(); 9jNh%raG| nEndPos = input.readLong(); P 6=5:-Hh } C',uY7}< input.close(); +RkXe;q } /V#?d catch(IOException e){e.printStackTrace ();} z3>4 xn{ catch(Exception e){e.printStackTrace ();} Fzy#!^9Nu } I
}8b] <p2\;\?4z D>Rlm,U private void processErrorCode(int nErrorCode) qG g2 9 { }9;mtMR$ System.err.println("Error Code : " + nErrorCode); 8qxZ7|Y@ } M
8(w+h{ Xh/BVg7$ ~lqNWL^l //停止文件下载 Ag8lI+
h public void siteStop() dk]A,TB*2 { D-x*RRkpp bStop = true; s%6L94\t for(int i=0;i<nStartPos.length;i++) NdXC8 fileSplitterFetch.splitterStop(); 5D
XBTpCVM @3FQMs4 &h=f } +~M.VsX } 1'dZ?`O //负责部分文件的抓取 TD4
n%k. **FileSplitterFetch.java M8y|Lm}o */ dP]Z: package NetFox; ,_=LV ;<xPzf :/RvtmW import java.io.*; Fx)><+- import java.net.*; l Ttc# ~*Y/#kPY Uv=)y^H~*A public class FileSplitterFetch extends Thread { */$] kE HW"5MZ8E x`'s String sURL; //File URL %>y!N!.F long nStartPos; //File Snippet Start Position 7; ?7q long nEndPos; //File Snippet End Position F*NHy.Y int nThreadID; //Thread's ID dwiLu& ]u boolean bDownOver = false; //Downing is over Gvr>n@n boolean bStop = false; //Stop identical V|{~9^ FileAccessI fileAccessI = null; //File Access interface :X7O4?ww zn|O)"C ?,[$8V public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException |O"Pb`V+ { r "\<+$ 7 this.sURL = sURL; pF}E`U=Z this.nStartPos = nStart; kY'C'9p this.nEndPos = nEnd; L[Wi[S6=)g nThreadID = id; &[yYgfsp fileAccessI = new FileAccessI(sName,nStartPos);//定位 "39mhX2 } 6k+tO%{~ XZ3M~cDq VjZb\
d4 public void run() gAsjkNt? { ?;w\CS^Qu while(nStartPos < nEndPos && !bStop) S>"C}F$X { \D#+0 2t=&h|6EW x'%vL",% try{ u(ETc*D] URL url = new URL(sURL); ?b(DDQMf HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); eV0eMDY5 httpConnection.setRequestProperty("User-Agent","NetFox"); !yKrA|w1 String sProperty = "bytes="+nStartPos+"-"; 'p%w_VbI httpConnection.setRequestProperty("RANGE",sProperty); !8RJHMX& Utility.log(sProperty); ma`sv<f4-! y35e3 @Qqf4h InputStream input = httpConnection.getInputStream(); =Prz| //logResponseHead(httpConnection); Cth<x n(Q Nvd(Tad KT<N
;[; byte[] b = new byte[1024]; li}>xDSQ4 int nRead; ^[2siG while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) clIn}wQ { JNu+e#.Y nStartPos += fileAccessI.write(b,0,nRead); Yg1HvSw\ //if(nThreadID == 1) HLE%f; // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); XhOg> } 1}CJ& .O{_^~w_q ,^@/I: Utility.log("Thread " + nThreadID + " is over!"); G/KTF2wl7 bDownOver = true; i \ .&8 //nPos = fileAccessI.write (b,0,nRead); +^4HCyW } "m}N
hoD4 catch(Exception e){e.printStackTrace ();} 8BnsYy)j } SQJ4}w>i } Ek '%%% n." XiXsN ZP.~Y;Ch;- //打印回应的头信息 !nF.whq public void logResponseHead(HttpURLConnection con) ]TsmW ob { 3C#Sr6 for(int i=1;;i++) 1EliR uJ { : p7PiqQ String header=con.getHeaderFieldKey(i); u4[rA2Bf8E if(header!=null) <!?ZH"F0 //responseHeaders.put(header,httpConnection.getHeaderField(header)); Oc/ i' Utility.log(header+" : "+con.getHeaderField(header)); $,1KD3;+] else $ Vsf?ID break; DM{Z#b] } s>ZlW:jY } G-DOI e.;B?0QrV 1_)Y{3L public void splitterStop() &LhR0A { ,.uI> bStop = true; ?a~#`< } x\5\KGw16 OUm,;WNLf en16hd>^W: } ^<Sy{KY twql)lbx EB5^eNdL /* &t74T"(d **FileAccess.java nD{{/_"' *//文件访问(定位,写) Odbm"Y package NetFox; }A7]bd import java.io.*; l'"Ici#7Ls kBrU%[0O K1-y[pS]E public class FileAccessI implements Serializable{ w?M` gl8r o 0H.DeP //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 U5H5QW + RandomAccessFile oSavedFile; }9Awv#+ long nPos; ljk,R
G v`~egE17 uSNlI78D public FileAccessI() throws IOException WI\h@qSB { jN sM&s, this("",0); $Q56~AP } !F#^Peb r-c1_
[Q# p~Mw^SN' public FileAccessI(String sName,long nPos) throws IOException cu"ge]}, { EZ)GW%Bm2 oSavedFile = new RandomAccessFile(sName,"rw"); w)%/Me3o this.nPos = nPos; VJ|80?4h oSavedFile.seek(nPos); RVa{% } b@)nB X5o{d4R L C)+%9Edg public synchronized int write(byte[] b,int nStart,int nLen) C'fQ Z,r-v { jg=}l1M" int n = -1; _t\)W(E& try{ @i@f@.t oSavedFile.write(b,nStart,nLen); 3 bll9Ey n = nLen; 9I*`~il>{ } &,iPI2`O A catch(IOException e) '8UhYwyr { tcj3x< e.printStackTrace (); (KdP^.7 } ^97\TmzP{ AR5)Uws 2B=+p83< return n; 7>yb8/J } =1% < 7N[Cs$_] c:_dW;MJ0 }
YC d >I;J!{ zZ{(7Kfz /* <'z.3@D **SiteInfoBean.java _}:#T8h */ uZ(,7>0 package NetFox; A=pyaU`aE &3bh K5P xX2/uxi8 public class SiteInfoBean { "!_,N@\t @!2vS@f (c1Kg private String sSiteURL; //Site's URL OiMr, private String sFilePath; //Saved File's Path (j884bu private String sFileName; //Saved File's Name CeW}zkcT private int nSplitter; //Count of Splited Downloading File ueV,p?Wo V?o%0V AWz|HF#- public SiteInfoBean() HWi: CDgm {//nSplitter的缺省值为5 )dZ1$MC[ //default value of nSplitter is 5 ;>h:VnV(>( this("","","",5);
=U+_;;F= } #kPsg9Y TWTh! u13v@<HGc public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) %Y<3v\`_ { H4JwgQ sSiteURL= sURL; 7DCu#Y[ sFilePath = sPath; [p&2k&.XYe sFileName = sName; C9"yu&l this.nSplitter = nSpiltter; L<H6AzR+ ,ku3;58O< `ls^fnJTpf } _"'0^F$I /H<tv5mXJ G.sf>.[ public String getSSiteURL() NM&R\GI { SH#!Y return sSiteURL; _Q6` Wp6m } *d$r`.9j g,d'&r"JWt dn|OY.`| public void setSSiteURL(String value) `beU2N { tboc7Hor4 sSiteURL = value; cux<7#6af } 1n|K %8~g#Z +a!uS0fIJi public String getSFilePath() !S5_+.U# { }ec3qZ@ return sFilePath; d2[R{eNX= } $ J)2E g o1]Ze F rv;is=#1 public void setSFilePath(String value) /dq(Z"O_ { R1NwtnS sFilePath = value; B{\qYL/~ } tA]Y=U+Q d0 qc%.s UJhUb)}^ public String getSFileName() hT?|:!ED.F { l fJ
lXD return sFileName; +W[NgUrGJ } +N:=|u.g fs6% M]u Tg\wBhJr| public void setSFileName(String value) &24$*Oe { :zLeS- sFileName = value; Ki( } diDB>W *zTEK:+_ c},wW@SF2W public int getNSplitter() Z]x)d|3; { gL}x|Q2` return nSplitter; t'im\_$F } XL!^tMk 5;_&C=[ i*2l4 public void setNSplitter(int nCount) x>m=n_ { Zz@wbhMV nSplitter = nCount; K6M_b?XekA } mqk tM6 } )9'Zb`n do&0m[x% }hA h'*( /* z((9vi W
**Utility.java +!Lz]@9K */ SJXP}JB_ package NetFox; +#MQ8d Xl\yOMfp 8PtX@s43\ public class Utility { Q3|I.I e 'e5,%"5(c iyr'9BA public Utility() IM$I=5ye { F`U
YgN -VP da @@w gPzp/I } xA {1XS} FErKr) //线程睡眠 fw+ VR.#2H public static void sleep(int nSecond) 7R5!(g
{ {u_2L_ try{ ruTj#tWSo Thread.sleep(nSecond); QLum=YB } rtY4B~_ catch(Exception e) r,-9]?i { QB|D_?] e.printStackTrace (); AagWswv{Bf } 4,P!D3SH } kF o&! ^":Dk5gl //日志
Jk3V]u public static void log(String sMsg) OJ2I (8P { ~s UWXw7~ System.err.println(sMsg); l<YCX[%E } c0M>CaKD ?~#{3b I!uGI public static void log(int sMsg) v'W`\MKY) { GYM6 ` System.err.println(sMsg); K`% I!Br } PquATAzQA } y.m;4(( i1JWdHt Owz.C_{) /* jYi{[** **TestMethod.java GtNGrJU */ 9}DF*np`G package NetFox; =gb(<`{> oHI/tS4
_
T24?1 public class TestMethod { ?g~g GQV +HxL>\ z`Cq,Sz/ public TestMethod() 6
SosVE>Z { ///xx/weblogic60b2_win.exe =-GHs$u%f try{ Ap[}[:U SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); m&X6a C'[ //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); U&<Nhh SiteFileFetch fileFetch = new SiteFileFetch(bean); '5n67Hl 1 fileFetch.start(); o)hQ]d } .0zNt catch(Exception e){e.printStackTrace ();} (`&`vf d|8iD`sZz Qy+&N*k> } 6W abw: m+m,0Ey5H -n `igC public static void main(String[] args) /Xds+V^Z { +Eh^j3W new TestMethod(); *NDM{WB|) } AqzPwO^ } G`HL^/Z* 点击下载更多相关资料
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