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/* 1$D`Z/N"A **SiteFileFetch.java 33*d/%N9 */ -<JBKPtA package NetFox; [*{\R`M import java.io.*; +xBK^5/x import java.net.*; VN-#R=D aevG<|qP 3]OP9!\6 public class SiteFileFetch extends Thread { bNpIC/#0K 'L|GClc6) 'S4EKV] SiteInfoBean siteInfoBean = null; //文件信息Bean
|iUfM3 long[] nStartPos; //开始位置 n!eqzr{ long[] nEndPos; //结束位置 [aZ v?Z FileSplitterFetch[] fileSplitterFetch; //子线程对象 &DQ4=/Z long nFileLength; //文件长度 pkN:D+gS boolean bFirst = true; //是否第一次取文件 skDk/-*R boolean bStop = false; //停止标志 v&b.Q:h*' File tmpFile; //文件下载的临时信息 VFmg"^k5 DataOutputStream output; //输出到文件的输出流 2*q:
^ 3 [)s;e //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) _Z66[T+M public SiteFileFetch(SiteInfoBean bean) throws IOException KD"&_PX { OWXye4`* siteInfoBean = bean; %X,B-h^ //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); m9<%v0r tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); #+Yp^6zg if(tmpFile.exists ()) Sa?5iFg { syW9Hlm bFirst = false; ~d7Wjn$@ read_nPos(); {[t"O u } n]C%(v!u3 else =Q8H]F { 8Z4?X% nStartPos = new long[bean.getNSplitter()]; P-OPv%jyi nEndPos = new long[bean.getNSplitter()]; S|q!? /jqj } U|Z>SE<k ')u5 l 9oz (=R NBqV0>vR } gAr`hXO |;.Pj3)- q
5v?`c public void run() *)`kx { :m++ iR //获得文件长度 TcKvSdr' //分割文件 `zzKD2y //实例FileSplitterFetch FSU%?PxO //启动FileSplitterFetch线程 0ve` //等待子线程返回 a?,[w'7FU try{ Y=:KM~2hv if(bFirst) o!=lBfI { /y9J)lx nFileLength = getFileSize(); i2FD1*=/? if(nFileLength == -1) q1TW?\pjb: { fZ6 fV=HEF System.err.println("File Length is not known!"); .mT#%ex } :(l $^
M else if(nFileLength == -2) O\4+_y { ?bt`fzX{l System.err.println("File is not access!"); 5rfH;` } ]/o12pI else Jny)uo8 { Q$fRi[/L for(int i=0;i<nStartPos.length;i++) P!FEh'. { kByrhK5U nStartPos = (long)(i*(nFileLength/nStartPos.length)); '6o`^u> } hEv=T'*,K) for(int i=0;i<nEndPos.length-1;i++) CP]S-o}yd { k'@7ZH nEndPos = nStartPos[i+1]; z;y^t4
^9 } ljYpMv.>xG nEndPos[nEndPos.length-1] = nFileLength; aVppOxA } -3G 4vRIo } 97(Xu=tX
S$jV|xKB <}EV*`w4 //启动子线程 B?;' lDz* fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; -Wlp=#9 for(int i=0;i<nStartPos.length;i++) ]> )u+| { C(V[wvL fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), ~[|V3h4v siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), L$29L: nStartPos,nEndPos,i); $(@o$%d Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); "?.'{,Q fileSplitterFetch.start(); Q%& _On } WxVn&c\ // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(),
':4}O# siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); +}7Ea:K // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", >bfYy=/ nEndPos = " + nFileLength); RIy5ww}3| // fileSplitterFetch[nPos.length-1].start(); [lNqT1%] PTbA1.B Pt6hGSo. //等待子线程结束 EjR_-8@FK //int count = 0; CxbSj, //是否结束while循环 yn/?=
?0 boolean breakWhile = false; I*A0?{ 3Q'[Ee2-3 }W:*aU while(!bStop) \7Gg2;TA6o { ?Oy'awf_ write_nPos(); E0"10Qbi Utility.sleep(500); I 1 b breakWhile = true; $J QWfGwR ,4^9cFVo Iv$:`7|crX for(int i=0;i<nStartPos.length;i++) q&XCX$N { M.ZEqV+k if(!fileSplitterFetch.bDownOver) ]d@^i)2LF { 4F05(R8k breakWhile = false; mje<d"bW break; jM5_8nS&d } lx\qp`w } :+~KPn>w5 if(breakWhile) uY^v"cw/F break; L`9TB"0R+ 7 I_1 #O M{`/f@z( //count++; YfE>Pn'r //if(count>4) qbS'|--wH // siteStop(); k?3S } }.0Bl&\UK hi!L\yi +>JdYV<?0 System.err.println("文件下载结束!"); C=fsJ=a5; } 2R^O,Vu*W catch(Exception e){e.printStackTrace ();} U'tE^W } \Sg<='/{L; =%!e(N'p vB[~pQ;Z //获得文件长度 (+|X<Bl:` public long getFileSize() P
@zz"~f7 { q`XW5VV{K int nFileLength = -1; !CVuw try{ ?2{bKIV_ URL url = new URL(siteInfoBean.getSSiteURL()); `/z_rqJ0CL HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); G+0><,S httpConnection.setRequestProperty("User-Agent","NetFox"); U1OFDXHG v @:~mwy Mr-DGLJ int responseCode=httpConnection.getResponseCode(); =WC-Sj{I if(responseCode>=400) <"W?<VjO { {3VZ3i processErrorCode(responseCode); N;uUx#z return -2; //-2 represent access is error !)N|J$FU } Jlp<koy -;^;2#](g pe9@N9_5 String sHeader; h;-a`@rO ; #O" BT]ua]T+ for(int i=1;;i++) /RGNAHtIi { S='
wJ@?; //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); "< v\M85& //Utility.log(in.readLine()); PocYFhWQ` sHeader=httpConnection.getHeaderFieldKey(i); ?>af'o: if(sHeader!=null) Z%m-HE:k { Z`Pd2VRp if(sHeader.equals("Content-Length")) 'Gjq/L/x { h35Hu_c& nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); 2#3^skj break; p,F^0OU2}: } in<}fAro6 } btH _HE else ,_D"?o break; piOXo=9H. } $<|ocUC7 } LvJGvj catch(IOException e){e.printStackTrace ();} m#f{]+6U
catch(Exception e){e.printStackTrace ();} q]\X~
9# pQMtj0(y |ETiLR=& Utility.log(nFileLength); GMW,*if8p
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* (vc|7DX M return nFileLength; w%dL8k } fQ+\;iAU )4R:)-"f B&Y_2)v //保存下载信息(文件指针位置) T@[! A); private void write_nPos() y{d^?(- { >O7~h[FN try{ %+-C3\' output = new DataOutputStream(new FileOutputStream(tmpFile)); Fl3#D7K output.writeInt(nStartPos.length); g>
S*< for(int i=0;i<nStartPos.length;i++) Sm-wH^~KA { eKN$jlg // output.writeLong(nPos); U7iuY~L output.writeLong(fileSplitterFetch.nStartPos); ,RxYd6 output.writeLong(fileSplitterFetch.nEndPos); &\C [@_ } tNIlzR- output.close(); ~u87H? } in-C/m# catch(IOException e){e.printStackTrace ();} re &E{ catch(Exception e){e.printStackTrace ();} >T jJA# } gRJfX%*F X|DO~{-au QHt4",Ij //读取保存的下载信息(文件指针位置) 7^*"O&y_al private void read_nPos() PX(pX> { vuQ%dDxI try{ Avlz=k1* DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); BxK^?b[E8 int nCount = input.readInt(); ,`A?!.K$ nStartPos = new long[nCount]; F^k.is
nEndPos = new long[nCount]; q2rUbU_A( for(int i=0;i<nStartPos.length;i++) h*B|fy4K9U { nqVZqX@oE nStartPos = input.readLong(); 6t'l(E + nEndPos = input.readLong(); v%{.A) } &w8)* T input.close(); 7OCwG~_^ } U-kVNBs catch(IOException e){e.printStackTrace ();} mqff]m catch(Exception e){e.printStackTrace ();} evA/+F,& } Va
VN $_H` dsx]/49< private void processErrorCode(int nErrorCode) `(6r3f~XJ { ?ULo&P[ System.err.println("Error Code : " + nErrorCode); )vg5((C } {O<l[|Ip ig LMv+{ /walu+]h //停止文件下载 0[?ny`Y public void siteStop() qn1255fB { me6OPc;:! bStop = true; [%Bf<
J< for(int i=0;i<nStartPos.length;i++) +ISz?~8 fileSplitterFetch.splitterStop(); |2\{z{? ofYlR| `@[c8j7 } jcNT<}k
C } ae"]\a\&1o //负责部分文件的抓取 'Jf^`ZT} **FileSplitterFetch.java yme^b
;a */ =[\s8XH, package NetFox; mC?i}+4>4R ~8"8w(CG*I b^D$jY import java.io.*; "s!7dKXI" import java.net.*; *BuUHjTv -V,v9h^ Yt|6
X:l public class FileSplitterFetch extends Thread { :1t~[-h^ o?1;<gs MX4]Vpv String sURL; //File URL E9?phD long nStartPos; //File Snippet Start Position A)%A!
long nEndPos; //File Snippet End Position =@k%&* Y? int nThreadID; //Thread's ID &Ysosy* boolean bDownOver = false; //Downing is over /Q~gU< boolean bStop = false; //Stop identical 1x,[6H FileAccessI fileAccessI = null; //File Access interface c@v{`d dnV[ P ^v.,y3 public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException U|g:`v7 { Q{B}ef this.sURL = sURL; GnP|x}YM this.nStartPos = nStart; kcb.Wz~= this.nEndPos = nEnd; JK.ZdY% nThreadID = id; wdUBg*X8 fileAccessI = new FileAccessI(sName,nStartPos);//定位 n_3O-X( } V+I|1{@i0 o]
mD"3_ :1Q!$ m public void run() &QhX1dT+ {
B<C* while(nStartPos < nEndPos && !bStop) hEh}PX: { 5uxBK"q =m5SK5vLKT qhT@;W/X try{ 1KjU ]
r2 URL url = new URL(sURL); XoA+MuDzpo HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); >@"Oe httpConnection.setRequestProperty("User-Agent","NetFox");
>3c@x String sProperty = "bytes="+nStartPos+"-"; y#XbJuN/ httpConnection.setRequestProperty("RANGE",sProperty); ;]_o4e6\p Utility.log(sProperty); jg?x&'u\) }d<}FJ-, 3> Y6) InputStream input = httpConnection.getInputStream(); {'U
Rz[g //logResponseHead(httpConnection); sP ls
zC[ =b/L?dR.- _1U1(^) byte[] b = new byte[1024]; .nyfYa+ int nRead; U^Xm)lL while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) 8>7&E- { C:Hoq( nStartPos += fileAccessI.write(b,0,nRead); o`Ta("9^ //if(nThreadID == 1) H/Llj.-jg // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); E8-P"`Qba } ",!1m7[wF s>^dxF!+ $ aUo aI Utility.log("Thread " + nThreadID + " is over!"); *6} N =Z bDownOver = true; {#{DH?=^)u //nPos = fileAccessI.write (b,0,nRead); p ZZc:\fJ } Ps 8%J; catch(Exception e){e.printStackTrace ();} *W
kIq> } |_yYLYH'
} 4n4?4BEn {Lm~r+
U ;g~TWy^o //打印回应的头信息 9k 6r_G" public void logResponseHead(HttpURLConnection con) 3"P }n { `(3/$% for(int i=1;;i++) FHC\?Cg { Jej` ;I String header=con.getHeaderFieldKey(i); 1Uqu>' if(header!=null) AW,53\ 0 //responseHeaders.put(header,httpConnection.getHeaderField(header)); $_x^lr Utility.log(header+" : "+con.getHeaderField(header)); 4 M(-xl? else u{*SX k break; zSFDUZ]A3 } 1n@8Kv } +Xemf? )LyojwY_g Z"AQp _ public void splitterStop() rf$X>M=G { 3:C oZ bStop = true; BN4_: } et }T%~T D)d~3`=# *;fw%PW } #cCL.p"] ^6_Cc IqD_GL)Ms /* %b"\bHH **FileAccess.java uxzze~_+C *//文件访问(定位,写) V7Mh-] package NetFox; 1+U import java.io.*; ?'<nx{!c =hMY2D mzf+Cu:`v public class FileAccessI implements Serializable{ >b]S3[Q( d{E}6)1= //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 J;f!!<l\ RandomAccessFile oSavedFile; mD/MJt5 long nPos; -Q
U^c2 fOMvj%T@2 ()3O=! public FileAccessI() throws IOException G3{=@Z1 { pe{;~-|6 this("",0); :P(K2q3 } [mPjP%{=@ >z.<u|r2 Ix(><#P public FileAccessI(String sName,long nPos) throws IOException Y>&Ew*Y { txPIG/ oSavedFile = new RandomAccessFile(sName,"rw"); 44F`$.v96 this.nPos = nPos; q|LDo~H oSavedFile.seek(nPos); *>+,(1Fz } -%I2[)F< [l8jRT=R ]Qe{e3p; public synchronized int write(byte[] b,int nStart,int nLen) q.()z(M7 { ]7/
b/J int n = -1; U_{Ux2 try{ w &%~3Cz. oSavedFile.write(b,nStart,nLen); FSRj4e1y1 n = nLen; G2^et$<{uU } 5e fpeu catch(IOException e) bHI<B)=` { qVs\Y3u( e.printStackTrace (); Usta0Ag } c~v~2DM @_LN3zP ? mhs$g> return n; %zOh } 1Zi,b z1Ov|Q`
J;prC } m-jHze`D3 q`G, L( .YZgOJi /* W
mm4hkf **SiteInfoBean.java po}F6m8bX */ BY]i;GVq package NetFox; oaK%Ww6~ Hp(D);0+) T t>8? public class SiteInfoBean { )<xypDQ +nT'I!// mB\C?=_ private String sSiteURL; //Site's URL 36n>jS& private String sFilePath; //Saved File's Path `w.AQ?p@ private String sFileName; //Saved File's Name W'on$mB5< private int nSplitter; //Count of Splited Downloading File 5IbJ gp-T"l J=dJsk public SiteInfoBean() VG>vn`x>a {//nSplitter的缺省值为5
PTS]7 //default value of nSplitter is 5 4Ua>Yw0 this("","","",5); ehA;i.n } n\ Hs@. | 0,vQv ^xZ
e2@ public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) c c { |D.O6?v@ sSiteURL= sURL; Ap$y%6 sFilePath = sPath; .6~`Ubr}E sFileName = sName; 1w"8~Z:UXV this.nSplitter = nSpiltter; dC<LDxlv |/ }\6L] )RsM!} } A!63p$VT; gip/(/NX 9,]5v+ public String getSSiteURL() ?U7) XvQ { ^JR;epVJ
return sSiteURL; [\Qr. 2 } lHB) b}7E q:8_]Qt $c&0F, public void setSSiteURL(String value) (.3'=n|kE { H@uE> sSiteURL = value; l =IeJh } V|MY!uV /hv#CB>1x N]YtLa,t public String getSFilePath() z{]?h cY {
8%RI7Mg return sFilePath; ~]L}p } DDd|T;8 !8tS|C#2 o5aLUWi- public void setSFilePath(String value) AAUyy
: { T{vR, sFilePath = value; lnbmo Hv } cyd~2\Kv~ {w^uWR4f &GWkq> public String getSFileName() 9j|gdfb%ml { [{&jr]w`| return sFileName; xU9@$am } o'%eI (S^ck%]]a! sP$Ks#/ public void setSFileName(String value) +K6szGP { K\Eo z]? sFileName = value; /2NSZO } ZYtiMBJ RM*f|j d @rs3Q1z public int getNSplitter() D>wZ0p b- { %kU'hzLg return nSplitter; .gYt0raSY } ~S(^T9R yqSY9EX7 ^i_Iqph= public void setNSplitter(int nCount) %(LvE}[RJ { hRTMFgO nSplitter = nCount; fUcLfnr } G{c#\?12C } ;6DnId2Zh S_8r\B[>P 5 d ;|=K /*
CB*/ =Y **Utility.java !0fI"3P@r */ YL^Z4: p package NetFox; _ 6:ww/ [!?wyv3 68x}w
Ae public class Utility { `Q9+k< wRVD_? y(8d?]4:_ public Utility() BXTN>d27 { C{Blqf3V0 &(O06QL NJ$e6$g) } d=e{]MG( AMk~dzNt //线程睡眠 F";FG 0 public static void sleep(int nSecond) jzrt7p*k} { *]{=8zc2 try{ sb'p-Mj Thread.sleep(nSecond); 0>Fqx{!heq } G?[-cNdk catch(Exception e) |s`Kd-'|q { FaWl,} ] e.printStackTrace (); j)6G7T|
} $Q4=37H+ } 8_iHVc;< #>q[oie1e //日志 l;5`0N?QO public static void log(String sMsg) h[H%:743 { 5bBCpNa System.err.println(sMsg); 'bm:u } qC.i6IL {_as!5l oeGS
public static void log(int sMsg) ]Wy.R6 { cUC17z2D System.err.println(sMsg); O0zi@2m?B } m >hovikY* } "GLYyC t
2G1[j! Gt5$6>A /* +_-Y`O!Q **TestMethod.java FpC~1Nau */ O3&|}:< package NetFox; c85O_J r8+*|$K X}?ESjZJ public class TestMethod { b.,$# D{p z0;9SZ9 ,0.|P`|w public TestMethod() :Lc3a$qtx5 { ///xx/weblogic60b2_win.exe taixBNv try{ -7,vtd[h SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5);
Y 0]Kl^\A //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); s8yCC#H" SiteFileFetch fileFetch = new SiteFileFetch(bean); ?.~]mvOR fileFetch.start(); 5{HtJ?sKc5 } Z3Gm catch(Exception e){e.printStackTrace ();} ,?fN#gc : +=Yk-nJ bt0djJRw } .?70=8{ |
[p68v> yI lV[_ public static void main(String[] args) nxD'r { X+d&OcO=q new TestMethod(); df!+T0 } l~ CZW*/ } $e>/?Ss 点击下载更多相关资料
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