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/* mlVv3mVyR< **SiteFileFetch.java WHN b.> */ Ki=7nKs package NetFox; q #p)E=$ import java.io.*; 5z]dA~;*2 import java.net.*; Nb];LCx %M`|0g}! %<M<'jxSca public class SiteFileFetch extends Thread { u^]yz&9V p +T&9 D~?kvyJ SiteInfoBean siteInfoBean = null; //文件信息Bean P);Xke long[] nStartPos; //开始位置 )K?GAj]Pq long[] nEndPos; //结束位置 ! 4oIx` FileSplitterFetch[] fileSplitterFetch; //子线程对象 5t<]|-i! long nFileLength; //文件长度 VuPET boolean bFirst = true; //是否第一次取文件 dt \O7Rjw8 boolean bStop = false; //停止标志 <oXsn.'\ File tmpFile; //文件下载的临时信息 =d5!O~}r> DataOutputStream output; //输出到文件的输出流 W^Rb~b^? J.nVEqLZ //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) H]-W$V
public SiteFileFetch(SiteInfoBean bean) throws IOException /7lkbL { QE #$bCw siteInfoBean = bean; =TP>Y" //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); [e}]K: tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); z5vryhX_Z if(tmpFile.exists ()) ,Tz
,)rY { >|'6J!Op bFirst = false; #KK(Z\; read_nPos(); 4`UT_LcI } ; Q 6:# else N|~&Q!A& {
k9n nStartPos = new long[bean.getNSplitter()]; \6'A^cE/PX nEndPos = new long[bean.getNSplitter()]; ib&qH_r/ } xaS v'>Yc#VJ =
]@xXVf/ P\AH9#XL } UF%5/SiVX 3LxJ}>]TO }O>Zu[8a public void run() ;VuB8cnL` { ,9pi9\S //获得文件长度 v8@dvT< //分割文件 @i68%6H`? //实例FileSplitterFetch YiJu48J //启动FileSplitterFetch线程 Q:M>!| //等待子线程返回 sy`s$Ed! try{ +|H'Ij$ if(bFirst) ~ZNhU;%YW { y?JbJ nFileLength = getFileSize(); yJL"uleRT if(nFileLength == -1) p)jxqg { AFFLnLA<L System.err.println("File Length is not known!"); }M7kApb>Y } Sy'>JHx else if(nFileLength == -2) dJ!o/y6 { -Fdi,\e System.err.println("File is not access!"); 3?XLHMxW } e||_j else %OtW\T=u { =z/F=1^< for(int i=0;i<nStartPos.length;i++) D1n2Z:9 { 2|=_kN8; nStartPos = (long)(i*(nFileLength/nStartPos.length)); kwL)&@ } Ih7Eq/iu for(int i=0;i<nEndPos.length-1;i++) ry\']\k { o{he)r6)_ nEndPos = nStartPos[i+1]; VM,ZEt3Vy } Za6oYM_z nEndPos[nEndPos.length-1] = nFileLength; Hj\~sR$L- } aOHCr>po, } ul?BKV+3E qLP+@wbJ =c,gK8C //启动子线程 oB\Xl)A< fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; nAg(lNOWN for(int i=0;i<nStartPos.length;i++) zoJ;5a.3B { K;qZc\q fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), PWMaB siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), zEB1Br, nStartPos,nEndPos,i); }j?S?= ;m= Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); zvf]}mNx fileSplitterFetch.start(); ;Wa{q.) } &~%@QC/ // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), N>R%0m<e siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); ie(7m|. // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", (<l2 ^H nEndPos = " + nFileLength); v'!Ntk // fileSplitterFetch[nPos.length-1].start(); 3+-(;>>\ Q]wM/7 wuzz%9;@B //等待子线程结束 XNUqZ-M: //int count = 0; [&CM-`
N //是否结束while循环 a~*V boolean breakWhile = false; hwzUCh 5! g#4gGhI +V@=G &Ou0 while(!bStop) $3TTHS o { i .N1Cvp& write_nPos(); !_9$[Oq~ Utility.sleep(500); h)rf6*hw breakWhile = true;
i6d$/yP" UTQKlwPa HD{`w1vcN for(int i=0;i<nStartPos.length;i++) k&/)g3(N( { IDh`0/i] if(!fileSplitterFetch.bDownOver) qN[7zsaj { N%f!B"NQ breakWhile = false;
nvPE
N break; D-GU"^-9 } H/k W
:k } n@;x!c< + if(breakWhile) $3'+V_CZ3 break; L"iyjL<M ~
ZL`E Fnpn_O XlH //count++; t^,Qy.L0 //if(count>4) 358/t/4{p // siteStop(); Pm^N0L9?q } @;fE%N ~5NGDT#L* DOVX$N$3 System.err.println("文件下载结束!"); HF: T]n, } LUNs|\& catch(Exception e){e.printStackTrace ();} Wi?%)hur } X-1Vp_(,TP ;q; C^l Jyci}CU3\Q //获得文件长度 7V{"!V5 public long getFileSize() 66<\i ltUQ { LU,"i^T int nFileLength = -1; " ^baiN@ac try{ i=UTc1 URL url = new URL(siteInfoBean.getSSiteURL()); 7f%Qc %B HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); NNwd;AC httpConnection.setRequestProperty("User-Agent","NetFox"); -1 L"h@`3o| I#X2UQzP int responseCode=httpConnection.getResponseCode(); U%DF!~n if(responseCode>=400) Bh,)5E^m { kc'0NE4oq processErrorCode(responseCode); %Z[/U return -2; //-2 represent access is error 1MI7l)D? } I'9s=~VfY, +M##mRD [4Faq3T" String sHeader; ^D;D8A. CQHp4_ PdH`_/6 for(int i=1;;i++) "&#WMi { d^5SeCs6 //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); '[ g)v //Utility.log(in.readLine()); 8I\eromG sHeader=httpConnection.getHeaderFieldKey(i); $U1kP?pR if(sHeader!=null) Ws*PMK.0 { <
}wAP_y if(sHeader.equals("Content-Length")) n
[Xzo} { Ik5jwfz nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); s#4ew} break; Zng` oFD } iQ! } 7ml0 else y)/$ge_U break; };m7FO } !""!sFx)R } zt)PZff/YQ catch(IOException e){e.printStackTrace ();} As'M39*V catch(Exception e){e.printStackTrace ();} ^T&u!{82j Z!-<rajl gZ"{{#:} Utility.log(nFileLength); >3`ctbe nqxq@.L2 BgWz<k}5M return nFileLength; e#6&uFce } 5uV"g5?w vvsNWA Xc2B2c //保存下载信息(文件指针位置) !^l4EL5# private void write_nPos() RpXs3=9 { nn)`eR& try{ tM$0 >E output = new DataOutputStream(new FileOutputStream(tmpFile)); cCh5Jl@Z output.writeInt(nStartPos.length); an=+6lIl for(int i=0;i<nStartPos.length;i++) lDJd#U'V { a^XTW7]r // output.writeLong(nPos); ;Co[y=Z output.writeLong(fileSplitterFetch.nStartPos); wEfz2Eq output.writeLong(fileSplitterFetch.nEndPos); C*s0r; } rF'^w56 output.close(); R'9@A\7# } %V %#y $l catch(IOException e){e.printStackTrace ();} JQ@`EV9, catch(Exception e){e.printStackTrace ();} 9<A\npD } HcBH!0 j,56Lh%1 Vr-3M+l=O //读取保存的下载信息(文件指针位置) L`\`NNQC private void read_nPos() *mQDS.'AB@ { RC8)f8n try{ ^KZAYB9C DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); *)NR$9lGv int nCount = input.readInt(); B)DC,+@$ nStartPos = new long[nCount]; Jl>at nEndPos = new long[nCount]; D){"fw+b for(int i=0;i<nStartPos.length;i++) n.a=K2H:V { l<aqiZSY nStartPos = input.readLong(); LN.Bd, nEndPos = input.readLong(); *K}z@a_ } cPx~|,)l input.close(); \L9?69B~ } V8nz-DL{ catch(IOException e){e.printStackTrace ();} g^z5fFLg/8 catch(Exception e){e.printStackTrace ();} Tw}?(\ya } D0#T-B\# 2%5^Fi ?79SP p)oo private void processErrorCode(int nErrorCode) {V%%^Zhwy { V<HOSB7 System.err.println("Error Code : " + nErrorCode); AU\xNF3 } t*Vao j$|j8? qP;{3FSkAF //停止文件下载 o0aO0Y public void siteStop() *X=@yB*aK { L,L ~
.E bStop = true; r;cI}' for(int i=0;i<nStartPos.length;i++) m6_~`)R8 fileSplitterFetch.splitterStop(); Ko$ $dkSE *h*j% C,|nmlDN } yhSk"e'G } -[zdX}x.: //负责部分文件的抓取 c
YM CfP **FileSplitterFetch.java 5U-p'c9IC */ ]^*_F package NetFox; QH7V_#6bKP Jb3>vCIn
ko=aa5c import java.io.*; vz;7} Zj] import java.net.*; A*\o
c tA!
M IS,zy+w public class FileSplitterFetch extends Thread { DnNt@e2| j}rgOz. XlPK3^'N)h String sURL; //File URL <pTQpU long nStartPos; //File Snippet Start Position er["NSo long nEndPos; //File Snippet End Position u [V4OU}% int nThreadID; //Thread's ID fqcU5l[v, boolean bDownOver = false; //Downing is over !paN`Fz\a boolean bStop = false; //Stop identical .N5hV3 FileAccessI fileAccessI = null; //File Access interface s6uF5]M;2 )|U_Z"0H^ cy=I0 public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException 7oZ@<QP' { nd $H
3sf this.sURL = sURL; |~@x4J5, this.nStartPos = nStart; aW0u8Dz this.nEndPos = nEnd; RNv{n
mf nThreadID = id; Iz6ss(UJ fileAccessI = new FileAccessI(sName,nStartPos);//定位 U8-Q'1IT& } j>$=SMc pau*kMu^} tJUVw= public void run() n9]IBIthe { <O \tC81 while(nStartPos < nEndPos && !bStop) 6Gs{nFw { ]regi- LGU DAjG*K{ +"k.E
x0: try{ v2/yw, URL url = new URL(sURL); gHQPhe#n HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); TqS2!/jp httpConnection.setRequestProperty("User-Agent","NetFox"); &u+yM
D String sProperty = "bytes="+nStartPos+"-"; 0M$#95n httpConnection.setRequestProperty("RANGE",sProperty); 2wB.S_4"-< Utility.log(sProperty); Mam8\
OD E:08%4O InputStream input = httpConnection.getInputStream(); ad"'O] //logResponseHead(httpConnection); \@Ee9C13 p&i.)/ J"%8:pL byte[] b = new byte[1024]; %==G+S{ int nRead; TA Ftcs: while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) ~gu=x&{ { I*^5'N' nStartPos += fileAccessI.write(b,0,nRead); 44\!PYf7 //if(nThreadID == 1) 6N9 c<JC // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); ]YCPyc: } W*YxBn4 lemVP'cn pTcbq Utility.log("Thread " + nThreadID + " is over!"); *-?Wcz bDownOver = true; 3.Ji5~ //nPos = fileAccessI.write (b,0,nRead); Oq*n9V } tRLE,(S,- catch(Exception e){e.printStackTrace ();} L/H v4={ } "/Y<G } "Z;~Y=hC13
z'7#"D <KKDu$W|T //打印回应的头信息 MQwIPjk8 public void logResponseHead(HttpURLConnection con) ^ Xm/ { X.s*>' for(int i=1;;i++) tS?a){^:c { t";{1. String header=con.getHeaderFieldKey(i); t:\l&R& if(header!=null) ~V @;(_T //responseHeaders.put(header,httpConnection.getHeaderField(header)); GHv{ Utility.log(header+" : "+con.getHeaderField(header)); Vd,' s else 7e1dEgn break; z<a$q3!# } I`22Zwq: } T36x=LX -M6L.gi)oJ tC^ 1} public void splitterStop() '9 'l=Sh { gXLCRn!iR bStop = true; @zo7.'7P } G;/Q>V YnSbw3U.I 5QAdcEcN@O } 0Y7$d` B1E$v(P3M '0Lov]L /* S"zk!2@C **FileAccess.java x5oOF7#5 *//文件访问(定位,写) E(_KN[}S package NetFox; K]X`sH: import java.io.*; yk<VlS ^pj>9% md?b* public class FileAccessI implements Serializable{ eI^gV'UK {|z#70 //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 ?{eY\I RandomAccessFile oSavedFile; F$i$a b long nPos; R<|ejw R\*)@[y9l s2^B(wP public FileAccessI() throws IOException sm1;MF]/u { ^00{Hd6 this("",0); 'f*O#&? } fuMN"T 6%+ UgR:qjI #:#Dz.$L public FileAccessI(String sName,long nPos) throws IOException 6a*83G,k { RwW$O@0 oSavedFile = new RandomAccessFile(sName,"rw"); J@QdieW6 this.nPos = nPos; vs+QbI6>- oSavedFile.seek(nPos); wZjlHe } fp{G|.SA 8.yCA c_#*mA"+ public synchronized int write(byte[] b,int nStart,int nLen) 1fY>>*oP { ><=rIhG%H@ int n = -1; }z
wX try{ Yrxk Kw# oSavedFile.write(b,nStart,nLen); LKx` v90p n = nLen; fJy)STQ4 } .#0H{mk catch(IOException e) 'd/*BjNp) { 9*\g`fWc}{ e.printStackTrace (); /g@^H/DO } K\(6rS}N 7(C x!Yb lm$;:Roj* return n; vM(Xip7 } 3rNc1\a; T`\]!>eb L+.H z&*@ } ul@3
Bt I^G^J M! h=6xZuA\ /* F+ukAT
**SiteInfoBean.java &tj0M.- */ 6aY>lkp package NetFox; q>-R3HB rLzW` FaY_0G;y public class SiteInfoBean { \0?$wIH? pDn&V( ,[X_]e;
private String sSiteURL; //Site's URL J4>;[\%m private String sFilePath; //Saved File's Path |@RpWp>2 private String sFileName; //Saved File's Name b9 uBdo@o private int nSplitter; //Count of Splited Downloading File vd (?$ ARF\fF|<2 1k[GuG%/K public SiteInfoBean() 6{=_718l` {//nSplitter的缺省值为5 vk'rA{x //default value of nSplitter is 5 8eJE>g1J this("","","",5); !n<o)DsZR } m[:K"lZ
]2 ]-:6T0JuS GoIQ>n public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) 0Z
HDBh { TQc@lR! sSiteURL= sURL; xS8,W sFilePath = sPath; M'2r@NR8 sFileName = sName; g)R1ObpZ this.nSplitter = nSpiltter; o=_c2m
RlRs}yF VEs5;]#<2D } G\=_e8( Kkv<"^H g^l RG3a public String getSSiteURL() %;|0 { d1]i,C~Y return sSiteURL; H0>yi[2f } f~ZEdq8 fu4!t31 0V`[Zgf public void setSSiteURL(String value) dv!r. { ,j178EX sSiteURL = value; }y6q\#G } #U ASH& pRi<cO C6jR=@42Q public String getSFilePath() zN!j%T.e
{ +Gh7^v|" return sFilePath; Qxa{UQh}9 } D4Etl5k (=c1 N3%*7{X
9 public void setSFilePath(String value) |=K_F3aJ { "2{%JFE sFilePath = value; I ~$1Lu`~ } P@0Y./Ds |"]PCb)! I=Ijdwb H public String getSFileName() wK!~tYxP { h|)vv4-d| return sFileName; vH[Pb#f- } {mTytT :iPym}CE )9L/sKz public void setSFileName(String value) 2k5/SV
X { $yu?.b
9H# sFileName = value; ub K7B |p } rv7{Ow_Y qCPmbg %d;ezY '2 public int getNSplitter() (sTuG} {
t ls60h return nSplitter; 1m@^E:w } 9 OT,TpA N#ioJ^}n: X+82[Y,mB. public void setNSplitter(int nCount) ,S&z<S_ { rwf^,r"r nSplitter = nCount; 6b=q-0yj } L'Q<>{;Ig } #FH[hRo=6 "r'ozf2\ |E)aT#$f' /* \Qy$I-Du **Utility.java ",Cr,;] */ PXk?aJ package NetFox; !L24+ $ ,"2TArC'z <AoXEuD public class Utility { @n+=vC.xO ?cy4&]s @It>*B yB. public Utility() #,NvO!j<4 { #&
?g %' h2Bz F
fV\]L4% } DN] v_u+} )>a B //线程睡眠 5&!c7$K0 public static void sleep(int nSecond) {XCf-{a]~ { 9KuD(EJS try{ quxdG>8 Thread.sleep(nSecond); * ?Jz2[B } r@G#[.*A> catch(Exception e) WyhhCR=; { PBjmGwg7 e.printStackTrace (); s^8u&y)3 } PoSpkJH } a;AzY'R {KL5GowH //日志 , X{> public static void log(String sMsg) Z u*K-ep" { X[yNFW}S2W System.err.println(sMsg); na+d;h*~y } 9i q"" #]Y>KX2HG mN_Z7n;^eh public static void log(int sMsg) c3TKl/ { }hpmO- System.err.println(sMsg); yV_wDeAz } A!i q->+ } kFLB> j97 GX{XdJD IH*s8tPc /* @R|'X **TestMethod.java |I;$M;'r& */ J @IS\9O package NetFox; <@v]H@E f .
}c7 C#0Qd% public class TestMethod { Ah69
_>N`S xg@NQI@7 ),}AI/j;zY public TestMethod() ;]2s,za)qs { ///xx/weblogic60b2_win.exe SkQswH try{ pc]J[ S?P SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); XRN+`J //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); iUk-' SiteFileFetch fileFetch = new SiteFileFetch(bean); _i0kc,*C\ fileFetch.start(); _l`e#XbG } 6A
R2htN^ catch(Exception e){e.printStackTrace ();} q!~ -(&S *XOJnyC_H &EGqgNl } q'[}9e`Q w*9br SK 26?W
nu60 public static void main(String[] args) W#fZ1E6 { lCd@jB{ new TestMethod(); 5K%SL1N } nuQ]8- , } NE2pL@sk 点击下载更多相关资料
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