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/* hU)t5/h;K **SiteFileFetch.java fHt \KP */ oqrx7+0{ package NetFox; V^~RDOSy7n import java.io.*; vEv kC import java.net.*; m*0YMS>Y | 7vRtTP bzN[*X| public class SiteFileFetch extends Thread { /\J0)V @!ChPl WP<L9A SiteInfoBean siteInfoBean = null; //文件信息Bean Xr*I`BJ long[] nStartPos; //开始位置 1v@#b@NXM7 long[] nEndPos; //结束位置 W/'1ftn?D FileSplitterFetch[] fileSplitterFetch; //子线程对象 0cG'37[ long nFileLength; //文件长度 bWPsfUn# boolean bFirst = true; //是否第一次取文件 z4u.bU boolean bStop = false; //停止标志 <T 2O^ File tmpFile; //文件下载的临时信息 x6ghO-s DataOutputStream output; //输出到文件的输出流 j#HXuV6 }1a}pm2p //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) ["Zvwes#7 public SiteFileFetch(SiteInfoBean bean) throws IOException G|i0n
{ ~id6^#&> siteInfoBean = bean; 4,RPidv%O //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); ;QI9 OcE@/ tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); D
0Xl`0"' if(tmpFile.exists ()) p1N}2]e { *&U~Io"U bFirst = false; *>fr'jj1$ read_nPos(); >hunV'vu' } +Z`=iia> else D(b01EQ;d { r. 82RoG?G nStartPos = new long[bean.getNSplitter()]; -L2.cN_ nEndPos = new long[bean.getNSplitter()]; E'iE#He } 3(YvqPp& qs4jUm )f?I{ !gh8 Qs } r$jWjb \w9}O2lL WfPb7T public void run()
(s8b?Ol/ { zJQh~) //获得文件长度 OB>Hiy
//分割文件 S-t#d7'B //实例FileSplitterFetch *-VRkS-G //启动FileSplitterFetch线程 O'4G'H) //等待子线程返回 |)x7qy` try{ )JMqC+J3*t if(bFirst) k4+vI1Cs { ~IhAO}1 nFileLength = getFileSize(); 9a`LrB if(nFileLength == -1) M/ S~"iD { <q63?Ms' System.err.println("File Length is not known!"); \gA!)q.; } :Cq73:1\B else if(nFileLength == -2) NuZ2,<~9 { Dfs^W{YA System.err.println("File is not access!"); =VC18yA } =Rd`"]Mnfb else +!lDAkW0 { qS?o22 for(int i=0;i<nStartPos.length;i++) p
fc6;K:d { OqtGKda nStartPos = (long)(i*(nFileLength/nStartPos.length)); ^*.[b } ]545:)Q1 for(int i=0;i<nEndPos.length-1;i++) +\!.X_Ij { %=**cvVy nEndPos = nStartPos[i+1]; zlMh^+rMX } .n:Q~GEL nEndPos[nEndPos.length-1] = nFileLength;
rPH7
]] } i>M%)HN } aZ@pfWwa:
Pps$=` "i&)+dr- //启动子线程 B{Q}^Mcxy fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; <rC%$tr for(int i=0;i<nStartPos.length;i++) o.Kn DY { ]4aPn fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), s`yzeo siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), /HIyQW\Ki- nStartPos,nEndPos,i); %.Y5%TyP Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); 9f~qD&~ fileSplitterFetch.start(); fPeS; } *p/,Z2f // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), ^h?fr` siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); @O"7@%nu // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", zgD?e?yPO nEndPos = " + nFileLength); Q68~D.V%r // fileSplitterFetch[nPos.length-1].start(); L0w6K0J4 1UP
{j`-K| 6_mi9_w //等待子线程结束 B=A!hXNa //int count = 0; w/@ZPBRo] //是否结束while循环 n#!c!EfG boolean breakWhile = false; }s,NM%oI 8}n<3_ 0zW*JJxV while(!bStop) |5u~L#P { KL \>-
write_nPos(); yD"]:ts3 Utility.sleep(500); ^4=#,K breakWhile = true; rKgl:sj+ \,S|>CPQ 9'MGv*Ho for(int i=0;i<nStartPos.length;i++) ni;)6,i { n)yDep]$G if(!fileSplitterFetch.bDownOver) @]qP:h. { =l(euBb breakWhile = false; v3"6'.f;bY break; "Enb } 4cQP+ n } KV0*dB; if(breakWhile) FJn-cR.n break; o~$O$ Bx45yaT A]c'TT@6 //count++; /8;m.J>bf //if(count>4) kk
fWiPO^ // siteStop(); 'TeH(?3G } |z)s9B;:#i W.3b]zcV x-i1:W9; System.err.println("文件下载结束!"); [8T{=+k } Y`~B> J catch(Exception e){e.printStackTrace ();} ]I|(/+}M } S]3CRJU3` ]bds~OY5 U l"ms:v //获得文件长度 fkI 5~Y| public long getFileSize() \'~
E%=Q { q7 PCMe int nFileLength = -1; ^N7H~CT" try{ Pd7\Q]of URL url = new URL(siteInfoBean.getSSiteURL()); 8"%Es HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); Q6m8N httpConnection.setRequestProperty("User-Agent","NetFox"); q|*^{(tWs 3(e_2v [9sEc int responseCode=httpConnection.getResponseCode(); G&S2U=KdV% if(responseCode>=400) L{1sYR%s\ { t:2DB) processErrorCode(responseCode); $udhTI#, return -2; //-2 represent access is error 44KoOY_ } N3"Jo uP <0d2{RQ; G*z\
^H String sHeader; 'K4FS(q hywcj\[ ^QNc!{` for(int i=1;;i++) =~
Uhr6Q { I|rb"bG //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); SIp)& //Utility.log(in.readLine()); u1meysa{0 sHeader=httpConnection.getHeaderFieldKey(i); VcKB:(:[ if(sHeader!=null) yzN[%/ { 1AAyzAP9` if(sHeader.equals("Content-Length")) i#-v4g { \Th<7WbR6# nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); y,5qY}P+ break; wPg/.N9H } /\%<VBx ?q } rZ?:$],U! else JpS}X\]i break; JP4DV=}L } 6]v} } ~5,^CTAM catch(IOException e){e.printStackTrace ();} MZGhN
brd catch(Exception e){e.printStackTrace ();} l5-[a !<M
eWo b`X''6 Utility.log(nFileLength); ;M?)-dpZ ]FCP|Jz IV,4BQ$ return nFileLength; G(t:s5: } 6qT@M0)i Q]9$dr=Kk0 r *K //保存下载信息(文件指针位置) 6:5K?Yo private void write_nPos() )R7Sh51P { zamMlmls^ try{ ~&RTLr#\*M output = new DataOutputStream(new FileOutputStream(tmpFile)); -'Z Gc8) output.writeInt(nStartPos.length); #I=EYl=Vvi for(int i=0;i<nStartPos.length;i++) CNN9a7 { sqKx?r72 // output.writeLong(nPos); wqo:gW_ output.writeLong(fileSplitterFetch.nStartPos); 2|;|C8C output.writeLong(fileSplitterFetch.nEndPos); m?(8T|i } [rx9gOOa& output.close(); IQJ"B6U) } [NSslVr catch(IOException e){e.printStackTrace ();} .?{no}u. catch(Exception e){e.printStackTrace ();} Z8E<^<| } ~kZdep^] F
CYGXtc *?<N3Rr* //读取保存的下载信息(文件指针位置) x^K4&'</ private void read_nPos() "'CvB0> { z>PVv)X try{ =\6)B{#T DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); 1gHe$dzXk int nCount = input.readInt(); c~hH
7/v nStartPos = new long[nCount]; M|blg!j; nEndPos = new long[nCount]; m[}P for(int i=0;i<nStartPos.length;i++) v_XN).f; { P}4&J ^ nStartPos = input.readLong(); .HZ d.* nEndPos = input.readLong(); h,{Q%sqO } | In{5Ek input.close(); l\Ozy } _*~F1% d catch(IOException e){e.printStackTrace ();} G!j 9D catch(Exception e){e.printStackTrace ();} `4*I1WZW } :UdW4N- 'OnfU{Ai S#]]h/ private void processErrorCode(int nErrorCode) ]q"&V\b { hF$`=hE,F~ System.err.println("Error Code : " + nErrorCode); 1h@qcom9K_ } @JGmOwZ 4vg3F( :$D*ab^^P //停止文件下载 ehW [LRtq public void siteStop() r(r(&NU { 7 z bStop = true; }T[@G6# for(int i=0;i<nStartPos.length;i++) kx&JY9( fileSplitterFetch.splitterStop(); 5qrD~D' b^HDN(v \=0;EI-j } 6La[( ) } QVjHGY*R //负责部分文件的抓取 ^(JrOh' **FileSplitterFetch.java
Nk9=A4=| */ *5Zow 3 package NetFox; x;[ . ZzQ n~629 & d.+*o import java.io.*; 4.,EKw3 import java.net.*; :-{"9cgFR Lip#uuuXXN %gmx47 public class FileSplitterFetch extends Thread { $U[d#:] 1>e30Ri,g 0~U0s3 String sURL; //File URL 1]If<
< long nStartPos; //File Snippet Start Position oEX,\@+u long nEndPos; //File Snippet End Position Xy(QK2| int nThreadID; //Thread's ID c=u+X`
Q boolean bDownOver = false; //Downing is over 4$R!) boolean bStop = false; //Stop identical 6SCjlaGW5 FileAccessI fileAccessI = null; //File Access interface |*?N#0s5h c';~bYZ Fu.aV876\f public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException &6\&McmkX { `sm Cfh}j6 this.sURL = sURL; ]\yB, this.nStartPos = nStart; I<QUvs%e this.nEndPos = nEnd; v:SHaUS nThreadID = id; cx:_5GF fileAccessI = new FileAccessI(sName,nStartPos);//定位 8fqabR } wKpGJ&
{ ]-t)wGr \udB4O public void run() P8c_GEna { QjLU@?& while(nStartPos < nEndPos && !bStop) uL)MbM] { im*sSz 0 ( 7=fM}sk "\*)KH`C try{ a>GA=r URL url = new URL(sURL); 3.YH7rN
HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); | +;ZC y httpConnection.setRequestProperty("User-Agent","NetFox"); DG;u_6;JR String sProperty = "bytes="+nStartPos+"-"; :kHk'.V1( httpConnection.setRequestProperty("RANGE",sProperty); U)kyq Utility.log(sProperty); mH,s!6j?Vp 4>(K~v5;N B<s+I# InputStream input = httpConnection.getInputStream(); Hs)] //logResponseHead(httpConnection); r)S:=Is5 F,_cci`p ),{3LIr byte[] b = new byte[1024]; *wJ$U int nRead; (~G*'/) while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) ai?uJ} { 0c>>:w20D nStartPos += fileAccessI.write(b,0,nRead); q tOuA //if(nThreadID == 1) ^U~Er'mT
// Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); E{6ku=2F } k?h{6Qd `G ":y[Q \zJ^XpC Utility.log("Thread " + nThreadID + " is over!"); wp:$Tq a$ bDownOver = true; X)SUFhP\ //nPos = fileAccessI.write (b,0,nRead); eQQVfEvS } 8GxT! catch(Exception e){e.printStackTrace ();} Oi?Q^ISxP } 3R/6/+S- } ~^.,Ftkb@7 {Q/@ Y.~< 08:K9zr //打印回应的头信息 ^I/(9KP# public void logResponseHead(HttpURLConnection con) -rsS_[$2 { cMi9 Z] for(int i=1;;i++) `T[yyOL/ { 0(&uH0x String header=con.getHeaderFieldKey(i); 5M\0t\uEn if(header!=null) Mxz
X@GBX //responseHeaders.put(header,httpConnection.getHeaderField(header)); ,~;`@ Utility.log(header+" : "+con.getHeaderField(header)); qb nlD\ else 2;]tIt d1 break; lJa-O } _`Kh8G
{e } ~b8.]Z^ bY`Chb. ?Zv5iI public void splitterStop() &/EZn xl { Uj 3{c bStop = true; F4(;O7j9 } &[\zs&[@y &>B|?d !5+9~/; } PvUY
Q>Kw Bptt" Ypm*or /* b<fN,U<k **FileAccess.java Ct/6< *//文件访问(定位,写) Ql7opl,
package NetFox; j+<!4 0# import java.io.*; 1slt[&4N Y\!:/h]E& z=k*D^X public class FileAccessI implements Serializable{ a[^dK- F`Vp //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 0wBr_b! RandomAccessFile oSavedFile; ;Xidv9c long nPos; ,[m4+6G5 ?Wt_Obl ziW[qH { public FileAccessI() throws IOException KJ?/]oLr0 { TuMZHB7h; this("",0); yyR@kOGga } Zf u" 8fX W6B o\UK suj}A public FileAccessI(String sName,long nPos) throws IOException .hvn/5s { QL(}k)dB oSavedFile = new RandomAccessFile(sName,"rw"); `).;W this.nPos = nPos; 0txSF^x oSavedFile.seek(nPos); >fR#U"KPAB } b=Sl`&A mR{%f?B Q[O U` public synchronized int write(byte[] b,int nStart,int nLen) BcGQpv&x { /` x|-9 int n = -1; 7f=9(Zj try{ -JF|770i oSavedFile.write(b,nStart,nLen); Qzk/oHs n = nLen; A[d'*n[ } ]
)x z catch(IOException e) Iq":
U { 9aqFdlbY e.printStackTrace (); ~?A,GalS } cmh/a~vYaY #iGz&S3iN$ ?yz} return n; NOmSLIgt7 } j1toV$)P 1/qiE{NW y+iuA@WCv } 0H.B>:pv kqAQrg]n &sA6o"h~ /* ~pSD| WX **SiteInfoBean.java o:Z*F0qm */ .J\U|r package NetFox; >-y&k^a= <Q-ufF85) Mz{ Rh+gS public class SiteInfoBean { :S7yM8b` tbv6-)Hs /C8(cVNZ private String sSiteURL; //Site's URL W%Zyt:H` private String sFilePath; //Saved File's Path Zk;;~ESOU private String sFileName; //Saved File's Name kk5i{.?[ private int nSplitter; //Count of Splited Downloading File XKU=VOY
vrW9<{ k0D&F;a% public SiteInfoBean() !xqG-rd
' {//nSplitter的缺省值为5 kAk,:a;P //default value of nSplitter is 5 GrQAho this("","","",5); NtOR/*
} Mw5!9@Fc7 E[Io8|QA %J%gXk}] public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) v <Ze$^e& { )J88gMk+ sSiteURL= sURL; RBgkC+2 sFilePath = sPath; izWl5}+'B sFileName = sName; 3S2'JOTY this.nSplitter = nSpiltter; |]\bgh +[}]a3) /~tfP } 6k3l/ ~R fAUsJ[ '}YXpB public String getSSiteURL() K
:q-[\G { u#UeJuO return sSiteURL; et ~gO!1:* } ta 6WZu z=Vvb w./EJkKI public void setSSiteURL(String value) c`}X2u]k { zXf+ie o sSiteURL = value; O}f(h5!k } @Q1jH~t jh0$:6 `C nG*6ic public String getSFilePath() ~D=@4(f8| { dO// return sFilePath; yEqmB4^- } 7ER 2h* f}'gg }Voh5*$E` public void setSFilePath(String value) qL+y8* { (Mm{"J3uv sFilePath = value; A7RX2 } #f~a\}$I d,+n,;6Cf jb![ Lp public String getSFileName() i
}gxq { t5Mo'*j
= return sFileName; K]Cvk% } v(7A=/W_ omA*XXUx=8 4vQHr!$Ep public void setSFileName(String value) Fi/G, [q { |O9=C`G_ sFileName = value; #
|I@`#O } 8W[]#~77b enz Q}^ MH Yf8HN public int getNSplitter() 2,;t%GB { !Cy2>6v7 return nSplitter; D5m\u$~V } VfcQibm lmcDA,7 `k|nf9_ public void setNSplitter(int nCount) c-=0l)&'D= { ^Q,/C8qeb nSplitter = nCount; *vO'Z & } dJ^`9W } G0Eq}MyF /a|NGh% 7 f*_ /* <"+C<[n. **Utility.java RM+E */ KRZV9AJ package NetFox; U.F65KaKF PK4UdT NGY I%: public class Utility { v+sbRuo8 r*wKYb F]*-i 55S public Utility() 7&)F;;H { R*0F)M 6v#G'M#r !v L:P2 } W8NA. iIw
ea` //线程睡眠 =x'%zUgE public static void sleep(int nSecond) $bosGG { 9p4U\hx try{ ex+AT;o Thread.sleep(nSecond); 5Z,lWp2A } swFOh5z catch(Exception e) ~`E4E { B^?XE(. e.printStackTrace (); #+PbcL } o{LFXNcg[ } `C?OAR44 fO>~V1 //日志 g:M7/- " public static void log(String sMsg) b]#d04] { $@kw>2 System.err.println(sMsg); F8Wq&X#r } 1[`<JCFClc c7IR06E .A/H+.H; public static void log(int sMsg) }2,#[mM { 6S[D"Q94 System.err.println(sMsg); 3= zQ
U } *KH@u } eBIR*TZ): "%t`I) r_E)HL/A /* U.'@S8 **TestMethod.java n;`L5 */ 5z ^UQq package NetFox; 9%14k x 4</\o F5MPy[ public class TestMethod { 9 lJj/ \=_q{ ug"<\" public TestMethod() H;|:r[d! { ///xx/weblogic60b2_win.exe |uBC0f try{ 3og$'#6P SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); a3O_#l-Z //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); _l= SiteFileFetch fileFetch = new SiteFileFetch(bean); C}'="g^=sl fileFetch.start(); Ef!p:HBJ } gdE `UZ\ catch(Exception e){e.printStackTrace ();} ;S`-9}6 (x0*(*A} lkg*AAR?' } Z[S+L"0 hyfnIb@~} PZRn6Tc public static void main(String[] args) .{a2z*o { bK8F | new TestMethod(); r Ob"S* } :yjK*"T|OD } ZCFf@2&z8 点击下载更多相关资料
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