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/* BVv{:m{w **SiteFileFetch.java M]A!jWtE */ YCo qe,5 package NetFox; }Z8DVTpX} import java.io.*; Y]H,rO import java.net.*; H]VoXJ\* 0R}F(tjw nBGcf(BE.$ public class SiteFileFetch extends Thread { R9O1#s^ d2O x:| <) Q ;$NDYV1 SiteInfoBean siteInfoBean = null; //文件信息Bean obSLy
Ed long[] nStartPos; //开始位置 &v<Am%!N long[] nEndPos; //结束位置 /@+[D{_Fw FileSplitterFetch[] fileSplitterFetch; //子线程对象 tz/NR/[ long nFileLength; //文件长度 5ii:93Hlj boolean bFirst = true; //是否第一次取文件 h"On9 boolean bStop = false; //停止标志 ')1p File tmpFile; //文件下载的临时信息 3Jw}MFFV DataOutputStream output; //输出到文件的输出流 mI-9=6T_ n@y*~sG] //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) x4;ndck%U public SiteFileFetch(SiteInfoBean bean) throws IOException </9@RO { 0i/!nke. siteInfoBean = bean;
D:Fi/JY~ //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); \* SEj&9 tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); i|QL6e*0 if(tmpFile.exists ()) = K3NKPUI { 8 J;\Z bFirst = false; n_Bi HMIU' read_nPos(); MUvgmJsN } 7r wNjY# else m$B)_WW { dn:/8~B"X nStartPos = new long[bean.getNSplitter()]; 3Tz~DdB nEndPos = new long[bean.getNSplitter()]; D4\
*
,w } Q(h/C!rKe M 3c 9hdz<eFL |J^$3RX } s!WI:E7 |!"qz$8fB @]X5g8h public void run() $gysy!2}. { ]%Z7wF</ //获得文件长度 pX]"^f1?O //分割文件 >0.a#-u^ //实例FileSplitterFetch ?$ 0t @E //启动FileSplitterFetch线程 8 ;o*c6+ //等待子线程返回 j2Uu8.8d try{ ;'4HR+E" if(bFirst) ~<q^4w.=7C { (K3eb nFileLength = getFileSize(); ^ 9 FRI9? if(nFileLength == -1) kyu
PN<? {
+z?SKc System.err.println("File Length is not known!"); H:_R[u4r } 6>j0geFyE2 else if(nFileLength == -2) GNab\M. { fE,Io3 System.err.println("File is not access!"); 0=V
-{ } -1c{Jo else <^fvTb &* { sH /08Z for(int i=0;i<nStartPos.length;i++) =w2_1F" { /'Q2TLy= nStartPos = (long)(i*(nFileLength/nStartPos.length)); xBg.QV } CCU<t
Q for(int i=0;i<nEndPos.length-1;i++) ;eT+Ly|{ { Or,W2 nEndPos = nStartPos[i+1]; >j_N6B! } 1 JB~G7 nEndPos[nEndPos.length-1] = nFileLength; E 9v<VoNP` } GLr7sack } (V9 ; b?nORWjC D=:O^< //启动子线程 j/uu&\e fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; 2^4OaHY88 for(int i=0;i<nStartPos.length;i++) )l[bu6bM { Rxk0^d:sNi fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), i;mA| siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), H?tX^HO:q nStartPos,nEndPos,i); l{4rKqtX Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); )k6kK} fileSplitterFetch.start(); 'O[0oi& } h#(J6ht // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), m\e?'-(s siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); C5x*t Q| // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", 7j8Ou3 nEndPos = " + nFileLength); -8m3L // fileSplitterFetch[nPos.length-1].start(); 9q_c` Ji7<UJ30x D'<'"kUd //等待子线程结束 bW^JR, //int count = 0; V3c7F4\ //是否结束while循环 OS sYmF boolean breakWhile = false; DZqY=Sze
vfloha p pgEDh^[MW while(!bStop) NGVl/Qd { {W$K@vuV;? write_nPos(); (fcJp)D Utility.sleep(500); -)Of\4kx breakWhile = true; #VynADPs`o /nB|Fo_&Q B<oBo&uA for(int i=0;i<nStartPos.length;i++) ^vha4<'-qG { e]-%P(}Z if(!fileSplitterFetch.bDownOver) oUx%ra{ { 0Ait7` breakWhile = false; M*2
Nq=3 break; (Fs{~4T } MZ"|Jn } s"B+),Jod if(breakWhile) )%vnl~i! break; #dDM
"s lGpci jH?!\F2)+ //count++; E D^0t //if(count>4) aDda&RM // siteStop(); uS7kkzt-x } \h5!u1{L oMHTB!A=2 6QAhVg: A System.err.println("文件下载结束!"); ppzQh1 } t[o_!fmxZ catch(Exception e){e.printStackTrace ();} a6!|#rt } t4Pi <m:7 D`3`5.b FA!!S`{\ //获得文件长度
()e|BFL . public long getFileSize() RAj>{/E#W { h]pz12Yf int nFileLength = -1; v W4n>h}] try{ AL;4-(KH URL url = new URL(siteInfoBean.getSSiteURL()); %uDH_J|^ HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); "NtY[sT{V httpConnection.setRequestProperty("User-Agent","NetFox"); R*DQLBWc v-DZW, Fs&r^ [/b int responseCode=httpConnection.getResponseCode(); t ^~Qv if(responseCode>=400) XeX`h_ { d
r$E:kr processErrorCode(responseCode); nYE%@Up return -2; //-2 represent access is error OXI>`$we } ;b!qt-;.< p v]" 2'aQ SM\qd4 String sHeader; i>e?$H,/ %S/?Ci 1P?|.W_^1 for(int i=1;;i++) '9!J' [W { J?C:@Q //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); u=t.1eS5 //Utility.log(in.readLine()); S? #6{rx sHeader=httpConnection.getHeaderFieldKey(i); v1z
d[jqk if(sHeader!=null) %rJ'DPs { GA;h7 if(sHeader.equals("Content-Length")) oL@K{dk { (dTQ,0 nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); !cW!zP-B*p break; Up5 |tx7 } E8BIb 'b; } &O#,"u/q` else
fj'7\[nZ break; )3k?{1: } <QD[hO^/ } JJK-+a6cX catch(IOException e){e.printStackTrace ();} Z@}qL1 catch(Exception e){e.printStackTrace ();} bvS6xU-
J 3~:9ZWQ/ N-W>tng_x Utility.log(nFileLength); [0vqm:P IKV!0-={!z 0o!mlaU# return nFileLength; 8Qhj_ } 3S"
/l ,B'fOJ.2 .y<u+) //保存下载信息(文件指针位置) |}b~YHTs private void write_nPos() 7}vI/?r { kpXxg: c try{ zd/kr output = new DataOutputStream(new FileOutputStream(tmpFile)); me@)kQ8M output.writeInt(nStartPos.length); DTG-R>y^ for(int i=0;i<nStartPos.length;i++) Jj?HOtaM { Q-z `rW // output.writeLong(nPos); :W;eW%Y output.writeLong(fileSplitterFetch.nStartPos); ;Y0M]pC output.writeLong(fileSplitterFetch.nEndPos); ~r~YR= } iBI->xU[U output.close(); sNM ]bei } ~d\^ynQ catch(IOException e){e.printStackTrace ();} t
YxN^VqU catch(Exception e){e.printStackTrace ();} O_]hbXV0 } B<i(Y1n[ zK&1ti@wln ,3N>`]Km' //读取保存的下载信息(文件指针位置) -E~r?\;X private void read_nPos() L9-Jwy2(> { 4:-x!lt try{ 7ug"SV6Hb DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); HLOrDlj7 int nCount = input.readInt(); f;AI4:#I nStartPos = new long[nCount]; 7hTpjox2 nEndPos = new long[nCount]; Jy\0y[f* for(int i=0;i<nStartPos.length;i++) R9!U _RH { k||dX(gl nStartPos = input.readLong(); &>&6OV]P' nEndPos = input.readLong(); ln+.=U6Tm } *V 4%&&{ input.close(); Tdm|=xI
} 8i5S
} catch(IOException e){e.printStackTrace ();} {xeJO:M3/ catch(Exception e){e.printStackTrace ();} b$yIM } s1h|/7gG RMiDV^.u` UI"UBZZ$ private void processErrorCode(int nErrorCode) 2gh=0%|\gx { |L`U2.hb System.err.println("Error Code : " + nErrorCode); ;|0P\3 } >I/@GX/ ;!G#Y
Oe $v # //停止文件下载 /QWXEL/M= public void siteStop() Y[]I!Bc { :)i,K>y3i bStop = true; } C:i0Q for(int i=0;i<nStartPos.length;i++) `hdff0 fileSplitterFetch.splitterStop(); 1YQYZ^11 AwjXY,2 ZuybjV1/f6 } m#8(l{3| } kJpO0k9?eY //负责部分文件的抓取 TY'c'u, **FileSplitterFetch.java [T,Hpt */ (xHu@l!] package NetFox; i1XRBC9 l5.k2{' ^lt2,x import java.io.*; TA0(U$ 4 import java.net.*; A]TEs)#*7) V?1[R =yz"xWH public class FileSplitterFetch extends Thread { #:+F
ti (Hx 57EX#:a String sURL; //File URL Le:C8^ long nStartPos; //File Snippet Start Position [^s;Ggi9 long nEndPos; //File Snippet End Position s .<.6t:G4 int nThreadID; //Thread's ID G;flj}z boolean bDownOver = false; //Downing is over q&J5(9]O|L boolean bStop = false; //Stop identical $y&W: FileAccessI fileAccessI = null; //File Access interface 8["%e#%`$ pZ}B/j n1{[CCee@ public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException i@.Tv.NZ { 8toOdh this.sURL = sURL; sv?Fx;d this.nStartPos = nStart; %~x?C4L8 this.nEndPos = nEnd; ah hl nThreadID = id; "~0`4lo:Xo fileAccessI = new FileAccessI(sName,nStartPos);//定位 -fk;Qq3O } '?| 1\j +Wg/O
- Jw8?o/1D@ public void run() }x\#ul) { `-.2Z
0 while(nStartPos < nEndPos && !bStop) pB\:.?.pd { DqT<bNR1*; Y(bB7tR r'j88)^ try{ ij;NM:|Sd URL url = new URL(sURL); \fUX_0k9, HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); z4Zm% httpConnection.setRequestProperty("User-Agent","NetFox"); %jy$4qAf% String sProperty = "bytes="+nStartPos+"-"; S4`X^a}pY httpConnection.setRequestProperty("RANGE",sProperty); `
PQQU~^ Utility.log(sProperty); SMD*9&, [U/h'A.j v:/\;2 InputStream input = httpConnection.getInputStream(); NI#]#yM+ //logResponseHead(httpConnection); Fz';H aqN{@| Qy0w'L/@ byte[] b = new byte[1024]; bf0,3~G,P int nRead; o+&Om~W while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) JR#4{P@A { j
:B/ FL nStartPos += fileAccessI.write(b,0,nRead); #55:qc>m //if(nThreadID == 1) 4qp|g'uXT // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); G(.G>8pf } Ba8=nGa4KY oG1zPspL WM?-BIlT= Utility.log("Thread " + nThreadID + " is over!"); W/bW=.d
Jd bDownOver = true; -
[h[ //nPos = fileAccessI.write (b,0,nRead); F0p=|W } X':FFD4h catch(Exception e){e.printStackTrace ();} Ajm!;LA[jO } =DJ:LmK } G~8BND[." TT/H"Ri}Jp tngB;9c+w //打印回应的头信息 n}.e(z_" public void logResponseHead(HttpURLConnection con) Hs'~)T { nH?6o#]N for(int i=1;;i++) \hgd&H0UU { P0}{xq'k9v String header=con.getHeaderFieldKey(i); =yZq]g6Q if(header!=null) Zh;wQCDj //responseHeaders.put(header,httpConnection.getHeaderField(header)); }W8A1-UF Utility.log(header+" : "+con.getHeaderField(header)); TPJF?.le
' else nK :YbLdK, break; ah:["< z< } b(GV4% } dT*Yv`h H5x7)1Ir| Kh\ 7%>K# public void splitterStop() UgGa]b[9A { 'wk,t^) bStop = true; ?'6@m86d } I?}jf?!oM ;,[0 bmL v#qd q!64 } 7-K8u mG\QF0h 'G l~P><e /* z1Bi#/i **FileAccess.java \L(cFjLIl *//文件访问(定位,写) |qn2b= package NetFox; ,~naKd.ZY import java.io.*; g=$U&Hgs 8xO 8l5>t public class FileAccessI implements Serializable{ [[IMf-] Pl/ dUt_ //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 c EYHB1*cT RandomAccessFile oSavedFile; Gn8sB long nPos; F)hj\aHm k \t7yH]:>@ !6'N-b1 public FileAccessI() throws IOException Dhn7N8(LF! { nUP, Yd this("",0); d=xjLbsZ } _J!^iJ h5'hP>b# ^1.*NG8 public FileAccessI(String sName,long nPos) throws IOException m}wn+R { T06(Q[) oSavedFile = new RandomAccessFile(sName,"rw"); Q
84t= this.nPos = nPos; (p%|F` oSavedFile.seek(nPos); pz
/[${X } 7?=^0?a XG.[C> V+"%BrM public synchronized int write(byte[] b,int nStart,int nLen) x8rg/y { =:s`C,l.4 int n = -1; US ALoe try{ ;nBf oSavedFile.write(b,nStart,nLen); +-@n}xb@ n = nLen; "V>}-G& } %i9 e<.Ot catch(IOException e) |MZ1j(_ { T ?[28| e.printStackTrace (); h+1|.d } skcyLIb `MSig)V cuQ!"iH return n; &!CVF } 754MQK|g T o["o!(;z }d?;kt } GJ*IH9YR O% T?+1E 1<BKTMBq?{ /* M_ukG~/ **SiteInfoBean.java o0R?vnA= */ ur}'Y^0iR package NetFox;
B(;MI` ?@G s7' ,>-D xS public class SiteInfoBean { blgA`)GI 27D*FItc
g3$'Ghf private String sSiteURL; //Site's URL !{jw!bB private String sFilePath; //Saved File's Path [Y](Y3 /.N private String sFileName; //Saved File's Name Qfn:5B]tI private int nSplitter; //Count of Splited Downloading File #<*.{"T Nbpn"*L, dBXiLrEbs public SiteInfoBean() [~{F(Le {//nSplitter的缺省值为5 72sqt5C] //default value of nSplitter is 5 2o?j{K this("","","",5); U80=f2 } ,j*9 ) i=Qy?aU? '8;bc@cE public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) xvOz*vM? { ))=6g@( sSiteURL= sURL; eC!=4_lx) sFilePath = sPath; q%4X1 W sFileName = sName; S oeoUI]m this.nSplitter = nSpiltter; TGF$zvd [K3
te e v$:7}h= } F\DiT|?} VP#KoX85 C .S BJ public String getSSiteURL() MI`qzC*% { w6V/Xp][U return sSiteURL; ;|Mfq`s } QOXo(S 3lp'U&3`5 Lm4`O% public void setSSiteURL(String value) J>A9]%M { 01?+j%k=m/ sSiteURL = value; 6'^E
],:b } ;TJpD0 n*7^lAa2 +c~&o83[ public String getSFilePath() ]:gW+6w"C { Ok_}d&A return sFilePath; w#b@6d } zQyI4RHG[ hBX*02p M3jUnp& public void setSFilePath(String value) Q6HJ+H-Ub { L/ 7AGR|;C sFilePath = value; h <4`|Bg+ } /i,n75/y? Lu}jk
W* %nZ:)J>kz public String getSFileName() 9`*ST(0/ { `D77CC]vU return sFileName; 5pJe`}O4 } v#Rh:#7O%U B%8@yS =%m{|HQ` public void setSFileName(String value) J#$U<`j*G { ^bv^&V&IB sFileName = value; q-`&C } SZKYq8ZA)V ~,}|~ Cy[G7A% public int getNSplitter() p*b_"aF 1 { 9G/!18 X?f return nSplitter; w0~%,S } @R5^J{T e\V
-L_ 2Xe1qzvo public void setNSplitter(int nCount) BH0m[9nU; { 76tn`4NIP nSplitter = nCount; eUy*0 } &[[r| } Nm"P8/-09 NBPP?\1 !i"zM} /* $9`#p/V **Utility.java uHKEt[PS$ */ *a Z1 4 package NetFox; 76 !LMNf :i<*~0r< JdS,s5Z> public class Utility { R;!,(l !mxH/{+|n GeP={lj public Utility() hWy@?r. { qnp}#BZ n<C]
6H fmixWL7.Zg } ?0; 2ct TaRPMKk //线程睡眠 VW\S>=O99 public static void sleep(int nSecond) tczJk1g} { bA)nWWSg= try{ J1G}l5N Thread.sleep(nSecond); 7W)W9=&BT } TLsF c^X catch(Exception e) |`o|;A] { bo|THS
e.printStackTrace (); LTe ({6l0 } 8{ZTHY- } @/s|<* 5?^#v //日志 r]!#v{#. public static void log(String sMsg) k;^$Pd?t { z6R|1L 1 System.err.println(sMsg); p-iFe\+ } _{jC?rzb Z^> 4qf,k (X "J)xaQ public static void log(int sMsg) hP)Zm%@0f { C][$0 System.err.println(sMsg); fB+h( 2N~ } -~]H5er` } Mc,|C) O.+J%], y$%oR6K7- /* 7Y8~")f **TestMethod.java <YW)8J */ Z{B
e package NetFox; W4o8]&A fn,n'E] \x-2qlZ public class TestMethod { RH FRN&RU$ |<u+Xi
~ cA Nt7 public TestMethod() cTq@"v di { ///xx/weblogic60b2_win.exe 4G,FJjE`p try{ 2 q4p- SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); 9K@I //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); &\9%;k SiteFileFetch fileFetch = new SiteFileFetch(bean); f- XUto fileFetch.start(); &<;T$Y } vqN/ crJ@ catch(Exception e){e.printStackTrace ();} r,JQR)l0@V /Z6lnm7wJ B/;>v } *V kaFQZ$, M*0^<e~]F q? "> public static void main(String[] args) q5_zsUR= { :XhF:c[.: new TestMethod(); Es+I]o0K } (?Mn_FNE| } =_`q;Tu= 点击下载更多相关资料
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