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/* KE5kOU; **SiteFileFetch.java iAEbu&XG */ +US!YU package NetFox; :Uzm
import java.io.*; W.f/pu import java.net.*; 9}!qR|l3nR .\ULbN3Z 2ozax)GY public class SiteFileFetch extends Thread { XFHYQ2ME2 x:NY\._ 0WW2i{7`U SiteInfoBean siteInfoBean = null; //文件信息Bean z,[Hli*0 long[] nStartPos; //开始位置 [I,Z2G,Jb long[] nEndPos; //结束位置 eCDev} FileSplitterFetch[] fileSplitterFetch; //子线程对象 D&&9^t9S long nFileLength; //文件长度 ifMRryN4 boolean bFirst = true; //是否第一次取文件 wo;~7K boolean bStop = false; //停止标志 7Jyy z,!5 File tmpFile; //文件下载的临时信息 X;
\+<LE DataOutputStream output; //输出到文件的输出流 jUYWrYJ 45@ I *` //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) SuJ aL-; public SiteFileFetch(SiteInfoBean bean) throws IOException &WuN&As!Z { C\Wmq
[ siteInfoBean = bean; +ZaSM~ //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); ~ ?Qe?hB tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); S}m)OmrmA if(tmpFile.exists ()) !21FR* { ,GbR!j@6 bFirst = false; UJAv`yjG read_nPos(); }I+E\< } / |;RV" else _lJ!R:* { mW(W\'~_~ nStartPos = new long[bean.getNSplitter()]; zx"s*:O nEndPos = new long[bean.getNSplitter()]; FF`T\&u } by1<[$8r wj$<t'MN ~rqCN,=d urs,34h } .LnGL]/ J9--tJ?[>o In"ZIKaC public void run() ok"k*?Ov { b5dD/-Vj //获得文件长度 $kdB |4C //分割文件 g#pr yYz //实例FileSplitterFetch O-0x8 O^B //启动FileSplitterFetch线程
9]([\% ) //等待子线程返回 r,8 [O try{ 5FPM`hLT if(bFirst) B?gOHG*vd> { Drgv`z nFileLength = getFileSize(); 6RU~"C if(nFileLength == -1) #>("CAB02T { ~|DUt System.err.println("File Length is not known!"); UawyDs } YlJ@XpKM else if(nFileLength == -2) lV3x *4O= { Fh&G;aEq System.err.println("File is not access!"); Fc)@,/R"v } \g`\`e53? else d=$Mim { Z!a=dnwHz for(int i=0;i<nStartPos.length;i++) PfAgM1 { 7FP*oN? nStartPos = (long)(i*(nFileLength/nStartPos.length)); $D~0~gn~ } jE.N ev/ for(int i=0;i<nEndPos.length-1;i++) Ws3)gvpPA { S:#lH?<_ nEndPos = nStartPos[i+1]; 13$%,q) } u
OmtyX nEndPos[nEndPos.length-1] = nFileLength; cN-?l7 } gS!:+G% } t9GR69v:? ^,lIK+#Elz ehGLk7@7& //启动子线程 HYD'.uj fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; B-Ll{k^ for(int i=0;i<nStartPos.length;i++) s0TORl6Z| { o=:9y-nH fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), 7JD' ) siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), ?8H8O %Z8 nStartPos,nEndPos,i); ]!W=^! Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); dK$XNi13.5 fileSplitterFetch.start(); %OL$57Ia } ^&9zw\x;z // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), Hs;4lSyUO siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); ^
glri$m // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", %vn"{3y>rF nEndPos = " + nFileLength); p;`>e>$ // fileSplitterFetch[nPos.length-1].start(); j1Y~_ nY[WRt w !,_u)4 //等待子线程结束 hIYNhZv //int count = 0; y1jCg%'H //是否结束while循环
i<C*j4qQ boolean breakWhile = false; UP$.+<vm w8")w*9Lmg 9d0@wq. while(!bStop) =g7x'
kN { G{As,`{ write_nPos(); ih-#5M@ Utility.sleep(500); gMi0FO' breakWhile = true; //up5R_nx kYE9M8s; <`8n^m* for(int i=0;i<nStartPos.length;i++) { T/[cu< { P1.[ if(!fileSplitterFetch.bDownOver) f=l rg KE { nmee 'oEw breakWhile = false; |"q5sym8Y_ break; {LI=:xJJv } "@^k)d$ } np|Sy;: if(breakWhile) f=+mIZ break; `$Y.Y5mGtJ &~cBNw| ^)/0yB //count++; g i3F`
m //if(count>4) v4!VrI // siteStop(); %"i(K@ } d(ZO6Nr Q &N$<e(K
_O)>$.^6 System.err.println("文件下载结束!"); etQCzYIhn } udK%> catch(Exception e){e.printStackTrace ();} w0 M>[ 4 } 1;bh^WMJ dM.f]-g pHGYQ;:L //获得文件长度 GhAlx/K public long getFileSize() A;q9rD,_
{ Qab>|eSm int nFileLength = -1; RXMISt3+{y try{ /aCc17>2V{ URL url = new URL(siteInfoBean.getSSiteURL()); 8L=HW G!1 HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); YR\fa Vk httpConnection.setRequestProperty("User-Agent","NetFox"); l
K{hVqpt olB.*#gA o+iiSTJEe int responseCode=httpConnection.getResponseCode(); >a<.mU|# if(responseCode>=400) b}$+H/V { wq`s-qZu processErrorCode(responseCode); }^WdJd]P return -2; //-2 represent access is error
RF$eQzW } d UE,U= .<0ye_S'y -a}Dp~j String sHeader; 5+0gR
&|j Lz}OwKl y%$AhRk*U for(int i=1;;i++) l+K'beP { h%na>G //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); tPWLg), //Utility.log(in.readLine()); oN~&_*FE sHeader=httpConnection.getHeaderFieldKey(i); T3.&R#1M8- if(sHeader!=null) caR<Kb:;* { ,$L4dF3 if(sHeader.equals("Content-Length")) sjHE/qmq-Z { aH(J,XY nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); ,Q$q=E;X break; GTPHVp&y } F@7jx:tI } Vi$~-6n& else "m$##X\ break;
IZ-1c1
} tyDU
@M } h|9L5 catch(IOException e){e.printStackTrace ();} RZ?jJm$ catch(Exception e){e.printStackTrace ();} nIf1sH> 8P\G} Pl06:g2I Utility.log(nFileLength); se2!N:|R!G bjW]bRw pZ{+c return nFileLength; |-67\p] } <]t%8GB2V dm0R[[ 7 yx8z4*]kH //保存下载信息(文件指针位置) wo{gG?B private void write_nPos() qbN
=4 { \fLMr\LL& try{ \ A#41
output = new DataOutputStream(new FileOutputStream(tmpFile)); Igt#V;kK"2 output.writeInt(nStartPos.length); F`W?II? for(int i=0;i<nStartPos.length;i++) c9
eM/*: { T@B/xAq5! // output.writeLong(nPos); U[-o> W# output.writeLong(fileSplitterFetch.nStartPos); x_Y!5yg
E output.writeLong(fileSplitterFetch.nEndPos); H [\o RId } r.&Vw|*> output.close(); [#vH'y } YQvD|x catch(IOException e){e.printStackTrace ();} V#$RR!X' catch(Exception e){e.printStackTrace ();} &-6Gc;f8 } ;(Or`u]Dr CNyIQ}NJ S!CC
}3zw //读取保存的下载信息(文件指针位置) CAWNDl4 private void read_nPos() qS$Ox?Bw#u { (NU
NHxi5B try{ V! A~K
DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); `5.'_3 int nCount = input.readInt(); prF%.(G2) nStartPos = new long[nCount]; =z69e%. nEndPos = new long[nCount]; `p-cSxR_ for(int i=0;i<nStartPos.length;i++) %p=M; { G`61~F% nStartPos = input.readLong(); B%b4v nEndPos = input.readLong(); u'DRN,h+ } E7UU input.close(); sf87$S0 } 5coyr`7mP catch(IOException e){e.printStackTrace ();} i$G@R% catch(Exception e){e.printStackTrace ();} @o _}g !9= } zu{P#~21 k$R-#f; ,m:.-iy? private void processErrorCode(int nErrorCode) -;m0R { q,|j]+9q System.err.println("Error Code : " + nErrorCode); l<LI7Z]A } AJ`h9%B BM
.~ 5\ JIOR4' 9 //停止文件下载 $ @`V public void siteStop() .j0$J\:i { aP+X}r bStop = true; Be2DN5) for(int i=0;i<nStartPos.length;i++) .}TZxla0Zr fileSplitterFetch.splitterStop(); )'#A$ Fj WlC:l f+,qNvBY/ } ?mxMk6w } '8H4shYg //负责部分文件的抓取 q"8ea/ **FileSplitterFetch.java Fj3a.' */ /]Md~=yNp package NetFox; h2]P]@nW;W xj;H&swo ~IBP|)WA- import java.io.*; qiBVGH import java.net.*; :>f )g @,7GaK\ Ai?*s%8v public class FileSplitterFetch extends Thread { ,Uqs1#r joAv{Tc f+)L#>Gl? String sURL; //File URL C1n>M}b long nStartPos; //File Snippet Start Position D8?Vn" long nEndPos; //File Snippet End Position ,m|h<faZL int nThreadID; //Thread's ID 'yEHI boolean bDownOver = false; //Downing is over LYK"( C boolean bStop = false; //Stop identical }!.(n=idZ FileAccessI fileAccessI = null; //File Access interface YZ8>OwQz2 0-Ku7<a O;jrCB public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException (vJNHY M { /%1ON9o> this.sURL = sURL; 2-v%`fA this.nStartPos = nStart; !PQ<04jA! this.nEndPos = nEnd; y/7\?qfTk nThreadID = id; 8dIgjQX| fileAccessI = new FileAccessI(sName,nStartPos);//定位 )}Kf= } Js?]$V" yq\K)g*= A]oV"`f public void run() p]+Pkxz]' { >@_^fw) while(nStartPos < nEndPos && !bStop) pO3SUOP { 6 V=9M: rw JIx|( SZ'R59Ee< try{ flbd0NB URL url = new URL(sURL); $G@5qxcV HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); Wt-GjxGi httpConnection.setRequestProperty("User-Agent","NetFox"); bJTBjS-7 String sProperty = "bytes="+nStartPos+"-"; iz PDd{[ httpConnection.setRequestProperty("RANGE",sProperty); z$. 88^ Utility.log(sProperty); K
Z91- n 0L^e S|N_ o InputStream input = httpConnection.getInputStream(); })Vi //logResponseHead(httpConnection); E*K;H8}s _A9AEi'. &n:.k}/P byte[] b = new byte[1024]; =-n}[Y}A int nRead; nmKp[-5 while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) 9qzHS~l { WW~sNC\3`( nStartPos += fileAccessI.write(b,0,nRead); Ai3*QX //if(nThreadID == 1) I,vJbvvl! // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); c`w}|d]mC } ~=l;=7 T m&&m,6``P {_p_%; Utility.log("Thread " + nThreadID + " is over!"); 4>e&f&y~ bDownOver = true; c<Tf
2]vZE //nPos = fileAccessI.write (b,0,nRead); +#@I~u _}D } W.KDVE$}f catch(Exception e){e.printStackTrace ();} K1yzD6[eW } /@TF5]Ri } je=a/Y=%U{ yYA$I'Bm\ BpPy& //打印回应的头信息 yl+gL?IES public void logResponseHead(HttpURLConnection con) h
J)h\ { y _k
l:Ssa for(int i=1;;i++) #c.K/&Gc7j { E{P|)`,V String header=con.getHeaderFieldKey(i); w%jII{@, if(header!=null) Txb#C[` //responseHeaders.put(header,httpConnection.getHeaderField(header)); kUrkG80q| Utility.log(header+" : "+con.getHeaderField(header)); j{+.tIzpq[ else [/41%B2 break; /"Uqa,{ } R8Fv{7]c } #?- wm Q sCheHP B*Dz{a^.: public void splitterStop() $5%SNzzl { ;+hH bStop = true; jasy<IqT!{ } K`fuf= =$JET<( s
R/F" } ')<hON44EX '!~)?C< 7n<::k\lb /* r0% D58 **FileAccess.java *#+An<iT ; *//文件访问(定位,写) z[qDkL package NetFox; |#R7wnE[k~ import java.io.*; $Ri; ^pZw[ _ZSR.w}j/ 1f=gYzuO) public class FileAccessI implements Serializable{ ":QZy8f9% TJXT-\Vk //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 w@w(-F!%l RandomAccessFile oSavedFile; 8P&:_T! long nPos; |z^^.d~a0 .V8Lauz8 z 1X` o public FileAccessI() throws IOException <*cikXS { &`2)V;t this("",0); 8$Y9ORs4 } A#YrWW hf&9uHN%7m f
x+/C8GK public FileAccessI(String sName,long nPos) throws IOException iSs:oH3l { ri-b=|h2j oSavedFile = new RandomAccessFile(sName,"rw"); 1\I}2; this.nPos = nPos; q9s=~d7 oSavedFile.seek(nPos); Jij*x>K>y } T</F
0su| 6?c7$Y !%%6dB@%t public synchronized int write(byte[] b,int nStart,int nLen) yEE*B: { )bscBj@ int n = -1; =U?dbSf1* try{ U
z>+2m( oSavedFile.write(b,nStart,nLen); -m~#Bq n = nLen; u;2[AQ. } #!+:!_45 catch(IOException e) 4
"'~NvO { f9{Rb/l!BQ e.printStackTrace (); \z(gqkc 6 } 1o{Mck
.U]-j\ ^s"R$?;h return n; -PR N:'T } {F.[&/A E+;7>ja F0@gSurg) } P@c5pc#| h(EhkCf %n9aaoD /* c9h6C **SiteInfoBean.java zIAD9mQex */ ;u)I\3`*! package NetFox; A2Gevj?F$ [` 7ThHX f._ua>v,f public class SiteInfoBean { r*Ca}Z c5GuM|*7 5$C-9 private String sSiteURL; //Site's URL 9'bwWBf7 private String sFilePath; //Saved File's Path A~70 private String sFileName; //Saved File's Name U # qK. private int nSplitter; //Count of Splited Downloading File Ig>(m49d TarY|P7_ vx5Zl&6r public SiteInfoBean() =D"#U#>;7& {//nSplitter的缺省值为5 qlPT Ll //default value of nSplitter is 5 $(x] this("","","",5); )lDD\J7 } },-H"Qs _X
x/(.O 2<}%kQ` public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) b4N[)%@ { IW] rb/H sSiteURL= sURL; ' S/gmn sFilePath = sPath; pTLCWbF? sFileName = sName; Slc\&Eb this.nSplitter = nSpiltter; |P?*5xPB 6(-N FnT ;
BHtCuY } R.<g3"Lm> b@hqz!)l` mQ"-,mMI public String getSSiteURL() 7s^'d,P { [ub e6 return sSiteURL; sK?twg;D*| } ,r_Gf5c I{=Qtnlb FGBbO\</ public void setSSiteURL(String value) g*+>H1} { O*P.]d sSiteURL = value; MkXmA`cP } 5wU]!bxr NL+N%2XG7 #&e-|81H public String getSFilePath() 'i|YlMFI g { ]u/sphPe return sFilePath; z},# ~L6$q } `r 4fm`< ~WF\ cQ}{[YO public void setSFilePath(String value) deh*Ib:(S { 4 s9LB sFilePath = value; 4Ftu } QIFgQ0{ :NTO03F7v C\hM =% public String getSFileName() +R:(_:7 { {R{=+2K!|k return sFileName; EU Fa5C: } ]A_`0"m.U j3ls3H& 0jWVp-y public void setSFileName(String value) Bk{]g=DO { -m#)B~) sFileName = value; SUK?z!f<i } lPAQ3t!, SSzIih@u E2+`4g@{8< public int getNSplitter() %mgE;~"& { %iqD5x$OA return nSplitter; Q22 GIr } +&H4m=D-#a
K3l95he ` 5>b:3 public void setNSplitter(int nCount) +jgSV.N { hOK8(U0 nSplitter = nCount; n~Lt\K: } ]T) 'Hb } _DEjF)S z` b,h\
7F.4Ga; /* .*Qx\, **Utility.java >^{yF~( */ |;{6&S package NetFox; 7_[L o4_ >=w)x,0yX 2MK-5Kg public class Utility { Yx`n:0 dqcL]e @>7%qS public Utility() `">= { V0Hj8}l;M %B?=q@!QWn iH'p>s5L } hgE71H\s akTk( //线程睡眠 1k^oS$UT public static void sleep(int nSecond) ?Q;=v~-Q { 2st3 try{ #Bw0,\ Thread.sleep(nSecond); IdN41 } U
#0Cx-E catch(Exception e) 0PCGDLk8 { \z ) %$#I e.printStackTrace (); JK]PRDyD } %@Jsal' } MnHNjsO# N6TH}~62} //日志 /g.U&oI]D public static void log(String sMsg) .fs3>@T"# { cidP|ie^ System.err.println(sMsg); f%8C!W]Dm } "ocyK}l.?
zKK9r~ M "9807OME public static void log(int sMsg) D)}v@je"yP { IAyp 2 System.err.println(sMsg); V]?R>qhgu } 5IpDeJ$ } Zb#u0Tq 3__-nV /zox$p$?h /* `
G
kX **TestMethod.java {2gwk8 */ ,/U6[P_C5 package NetFox; dD@(z:5M\ J9 I:Q<; _(zG?]y0P public class TestMethod { G KeU%x 4 H&#q> DW3G public TestMethod() og>uj>H& { ///xx/weblogic60b2_win.exe 4I(Xy]wm try{ CNx8]
_2 SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); e~(5%CO>#j //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); q0\6F^;M SiteFileFetch fileFetch = new SiteFileFetch(bean); P+HXn8@ fileFetch.start(); 'we>q@ } >C~6\L`c catch(Exception e){e.printStackTrace ();} bQ5\ ]5M Ht&YC<X -%4,@
x` } I*^Ta{j[ -DAlRz#d, 9Gz=lc[!7 public static void main(String[] args) =?`c=z3~i$ { lUMdrt0@z new TestMethod(); q75s#[<ap } Yoll?_k+ } x$(f7?s] 1 点击下载更多相关资料
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