-
UID:2537
-
- 注册时间2006-05-09
- 最后登录2020-05-29
- 在线时间3小时
-
- 发帖8
- 搜Ta的帖子
- 精华
0
- 铜板1641
- 人品值95
- 贡献值0
- 交易币0
- 好评度8
- 信誉值0
- 金币0
-
访问TA的空间加好友用道具
- 发帖
- 8
- 铜板
- 1641
- 人品值
- 95
- 贡献值
- 0
- 交易币
- 0
- 好评度
- 8
- 信誉值
- 0
- 金币
- 0
- 所在楼道
|
/* `N"fsE ma **SiteFileFetch.java d/ OIc){tD */ <~Tlx: package NetFox; i>[1^~; import java.io.*; jsvD[ \P import java.net.*; VNbq]L(g RKP->@Gs B$ )6X public class SiteFileFetch extends Thread { -zVa[& [\&Mo]"0 a4}2^K SiteInfoBean siteInfoBean = null; //文件信息Bean 9{bzxM long[] nStartPos; //开始位置 :[N[D#/z long[] nEndPos; //结束位置 [y T4n.f FileSplitterFetch[] fileSplitterFetch; //子线程对象 bMD'teJ long nFileLength; //文件长度 Mr(~
* boolean bFirst = true; //是否第一次取文件 41TB boolean bStop = false; //停止标志 e+F5FAMR68 File tmpFile; //文件下载的临时信息 K/u`Wz~A DataOutputStream output; //输出到文件的输出流 SS;QPWRZ ?s5zTT0U>$ //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) y6o^ Knl public SiteFileFetch(SiteInfoBean bean) throws IOException
l%A~3 { }x1mpPND siteInfoBean = bean; `8TM<az-L //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); (K+TqJw tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); MNiu5-g5 if(tmpFile.exists ()) p\8cl/~ { \6Ze H bFirst = false; )8yee~+TN read_nPos(); OR^Wd } -j[n^y'v else 5@Q4[+5&_ { BifA&o% nStartPos = new long[bean.getNSplitter()]; ~&~%q u nEndPos = new long[bean.getNSplitter()]; .so{ RI } ?8(`tS(_? ;NRT
a* 43-%")bH j78xMGKO } N)h>Ie @X/S
h: ZjEO$ts=@ public void run() 5
^iU1\(L { K.R2)o` //获得文件长度 bYdC.AE //分割文件 h{sW$WA //实例FileSplitterFetch 2ezuP F //启动FileSplitterFetch线程 WytCc>oL //等待子线程返回 n a2"Sy=Yi try{ &bj :,$@ if(bFirst) $_Qo { A0rdQmrOL nFileLength = getFileSize(); Ytx+7OLe if(nFileLength == -1) ojVpw4y. { BPrA*u}T System.err.println("File Length is not known!"); i:kWO7aP } H]=3^ g64 else if(nFileLength == -2) `CK;,>i { X{#@ :z$ System.err.println("File is not access!"); #s#z@F } uU.9*B=H9 else B;;D(NH { |-_5ouN. for(int i=0;i<nStartPos.length;i++) *!9/`zW { :/vB,JC nStartPos = (long)(i*(nFileLength/nStartPos.length)); U&3*c+B4 } :/%Vpdd@ for(int i=0;i<nEndPos.length-1;i++) ^MJGY,r6b { hCT%1R}rKr nEndPos = nStartPos[i+1]; #4//2N } R~w(] nEndPos[nEndPos.length-1] = nFileLength; 0dkM72p } @LL&ggV? } yekIw F` I-G~e a
LmVOL{ //启动子线程 &ApJ'uC fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; Xe+&/J5b for(int i=0;i<nStartPos.length;i++) d;<n [)@ { }7=a,1T fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), D hZtiqL#_ siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), Xq>e]#gR nStartPos,nEndPos,i); -;P<Q`{I Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos);
GoEIY fileSplitterFetch.start(); z{#F9'\& } f6L_uk`{ // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), zW0AB8l siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); &vMH
AZd // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", :LBe{Jbw nEndPos = " + nFileLength); q<yH! // fileSplitterFetch[nPos.length-1].start(); Yn<0D|S;X uAjGR <Z m ,q} //等待子线程结束 gv[7h'}< //int count = 0; l(]\[}.5 //是否结束while循环 5&X boolean breakWhile = false; Ve8! G'Q7(c )%y~{j+ M while(!bStop) .v" lY2:N { rd,mbH[<C write_nPos(); 6ZG)`u".(" Utility.sleep(500); D`t e|K5 breakWhile = true; rmMO-!s Yip9K[ pz&=5F for(int i=0;i<nStartPos.length;i++) ;n;^f&;sJ { =` i 7? if(!fileSplitterFetch.bDownOver) gw*d"~A { Xl/G|jB9 breakWhile = false; #`p>VXBj! break; /5x`TT } T),:8/ } huF L [ if(breakWhile) ,g,jY]o break; y2 +a2 =O;SXzgE jVA~]a //count++; jYy0^)6X( //if(count>4) _"sRL}-Z // siteStop(); w@: ]]R } &1h3o^K dJLJh*=AG sd[QtK^ System.err.println("文件下载结束!"); R82Y&s; } y:A0!75 catch(Exception e){e.printStackTrace ();} fjWh}w8 } gNqV>p aydal9M }=|ZEhtOp //获得文件长度 KvD$`"L/CT public long getFileSize() {cv;S2 { _#gsR"FZ$ int nFileLength = -1; wi9| try{ Q
jBCkx]g URL url = new URL(siteInfoBean.getSSiteURL()); Yjl0Pz.q HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); }-L@AC/\# httpConnection.setRequestProperty("User-Agent","NetFox"); WvJ?e MJG%HakK0 5i^vN"J int responseCode=httpConnection.getResponseCode(); tbPPI)lu if(responseCode>=400) p&4n3%(R@ { ZWa#}VS}-n processErrorCode(responseCode); OV/FQH;V return -2; //-2 represent access is error )j6>b-H } >1~`tP .]e6TFsrO btF%}<o) String sHeader; _Y|kX2l
S@ cik@QN<[0 O0{ for(int i=1;;i++) U]D.z}0 { K%}I}8M //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); Q#Y3%WF //Utility.log(in.readLine()); v 2 GhR* sHeader=httpConnection.getHeaderFieldKey(i); O<h#|g1 if(sHeader!=null) `az`?`i7 { cA%U if(sHeader.equals("Content-Length")) Uu
X"AFy~\ { s4$m<"~ nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); 4sj%: break; 4:@|q:DR } I.u,f:Fl' } 3rY /6{ else Mak9qaWqF> break; BZ<z@DJp } GzXP } ]'h)7 catch(IOException e){e.printStackTrace ();} GF!{SO4 catch(Exception e){e.printStackTrace ();} GnOo+hB v,+l xY h<K;VpL6 Utility.log(nFileLength); N ]7a= B%@!\D# ]2%P``Yj return nFileLength; \r%Vgne-g } VQ?H:1R 9`v:$(I QiweM?- //保存下载信息(文件指针位置) |<|,RI? private void write_nPos() aTh%oBrtP { NydW9r:T try{ k6-n.Rl01 output = new DataOutputStream(new FileOutputStream(tmpFile)); mF}k}0 output.writeInt(nStartPos.length); JX)z<Dz$ for(int i=0;i<nStartPos.length;i++) /V<`L {
t MZ(s // output.writeLong(nPos); ?+O|mX}`- output.writeLong(fileSplitterFetch.nStartPos); d95N$n
output.writeLong(fileSplitterFetch.nEndPos); (1,#=e+ } W79A4l< output.close(); c'+r[rSn1 } ;]M67ma7C catch(IOException e){e.printStackTrace ();} 'D"K`Vw catch(Exception e){e.printStackTrace ();} R[9PFMn } ]XGn2U\ 4D8y b|o *6D%mrK //读取保存的下载信息(文件指针位置) !;aC9VhSU private void read_nPos() ]2Fo.n { FFeRE{,
try{ "$IwQ DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); ~}0hN]*G int nCount = input.readInt(); K^vp(2 nStartPos = new long[nCount]; z){UuiUM+= nEndPos = new long[nCount]; !-RpRRR[Co for(int i=0;i<nStartPos.length;i++) +R#`j r" { SfobzX}~Jh nStartPos = input.readLong(); :/[YY?pg- nEndPos = input.readLong(); [9U srpYi } ;9 &1JX input.close(); .&Pe7`.BE } DYKV54\ue catch(IOException e){e.printStackTrace ();} eAYW%a catch(Exception e){e.printStackTrace ();} ~`>26BWQz } :z} _y&] `;qv} xFm{oJ!]& private void processErrorCode(int nErrorCode) +Q!xEfpO; { SxW}Z_8x System.err.println("Error Code : " + nErrorCode); p@8^gc } ]t*P5 FV6he[, 7k t7^V< //停止文件下载 q\b
?o!#_ public void siteStop() ,o>pmaoLs { eN<pU%7 bStop = true; \m~\,em for(int i=0;i<nStartPos.length;i++) v6P~XK}G fileSplitterFetch.splitterStop(); R`C_CsXir W8yfa[z~J ;Q>3N( } W3V{Xk| } LYy:IBI7_ //负责部分文件的抓取 ({_:^$E\ **FileSplitterFetch.java Ul713Bjz */ {8Jk=)(md package NetFox; <#p|z`N -KwL9J4u ilRm}lU|x import java.io.*; %QsSR'` import java.net.*; mf]( 3ZL X\^& nLa svq9@!go public class FileSplitterFetch extends Thread { M`C~6Mf+ k`7.p,;}U zUEfa!#? String sURL; //File URL 4=F]`Lql long nStartPos; //File Snippet Start Position %AEK[W+0 long nEndPos; //File Snippet End Position KB,~u*~! int nThreadID; //Thread's ID n#^?X boolean bDownOver = false; //Downing is over Vi?~0.Z% boolean bStop = false; //Stop identical gLxT6v5wk. FileAccessI fileAccessI = null; //File Access interface *L4]\wf _czbUl '^F|k`$r public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException \;B$hT7z* { Zn<(,e this.sURL = sURL; Gx h~ this.nStartPos = nStart; 4j@kMe;RjZ this.nEndPos = nEnd; ySuLt@X nThreadID = id; zA'gb'MmW fileAccessI = new FileAccessI(sName,nStartPos);//定位 -0KbdHIKb' } L=$?q/=- -M1~iOb c6Yf"~TD0 public void run() csFJ5 { WJY4>7}{B@ while(nStartPos < nEndPos && !bStop) N+C)/EN$ { \o62OfF! FU(}=5n zhA',p@K?_ try{ "doU.U&u URL url = new URL(sURL); o! 2n}C HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); 3!"b
guE httpConnection.setRequestProperty("User-Agent","NetFox"); u_p7Mcb String sProperty = "bytes="+nStartPos+"-"; |`k1zc)9 httpConnection.setRequestProperty("RANGE",sProperty); RvPniT(<? Utility.log(sProperty); PV]k3&y w$b+R8.n) y=oVUsG InputStream input = httpConnection.getInputStream(); (N*<\6kr //logResponseHead(httpConnection); BS-:dyBw ! =\DC,-CB s#+"5&!s byte[] b = new byte[1024]; _d\u!giy int nRead; C"U[ b% while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop)
rTP5-4 { HeT6Dv nStartPos += fileAccessI.write(b,0,nRead); /jjW/lr //if(nThreadID == 1) o%/-5- // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); ]{Mci]H6T } <uBhi4 #Cg}!38 G. -h=DT] Utility.log("Thread " + nThreadID + " is over!"); q:2aPfo& bDownOver = true; *;OJ~zT //nPos = fileAccessI.write (b,0,nRead); [V> :`? } )p/=u@8_f catch(Exception e){e.printStackTrace ();} 3WO#^}t } B@"SOX } k W<Yda<a pB g|n=^ b"R, p=M //打印回应的头信息 5#TrCPi6A public void logResponseHead(HttpURLConnection con) KdOh'OrT9. { D0Vyh"ua for(int i=1;;i++) H9Y2n 0 { e(OwS?K String header=con.getHeaderFieldKey(i); D4=..; if(header!=null) IdV,%d{ //responseHeaders.put(header,httpConnection.getHeaderField(header)); ,YP1$gj Utility.log(header+" : "+con.getHeaderField(header)); "<PoJPh else [):{5hMA break; 97qtJ(ESI } 5"-una>D } }
*
?n?' h*;g0QBkl V-D}U$fw public void splitterStop() Sk6b`W7$ { ;mf4U85 bStop = true; =_$XP } dN$ 1$B^k a"0B?3*r46 4
[R8(U[g } RLYU\@kK? 18DTv6?QG M>*0r<qn /* E;6Y? vJ **FileAccess.java ~-XOvKJb *//文件访问(定位,写) YMc8Q\*B package NetFox; X+]L-o6I2 import java.io.*; rao</jN.9 ?1GY%- 55 S\&Ad$ public class FileAccessI implements Serializable{ T-L|Q,-{- u-AWJc+F . //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 V,>+G6e RandomAccessFile oSavedFile; *'UhlFed long nPos; 0K=Qf69Y >.DF"]XM |A ;o0pL public FileAccessI() throws IOException Zu\p;!e { Q0pC4WJ` this("",0); !1ML%}vvB, } t{/hkXq] Ad dGB^7yl iBG`43; public FileAccessI(String sName,long nPos) throws IOException *)MX%`Z} { BQyvj\uJ oSavedFile = new RandomAccessFile(sName,"rw"); 6-mmi7IfO this.nPos = nPos; VK @$JwdL oSavedFile.seek(nPos); kP7a:(P_g } |0tg:\. Hu<p?mF# PV?]UUc'n< public synchronized int write(byte[] b,int nStart,int nLen) E|pk. { 1|o$X int n = -1; J__;.rnk try{ c]6V"Bo}A oSavedFile.write(b,nStart,nLen); %oAL n = nLen; Nc{]zWL9 } cvKV95bn catch(IOException e) u K'<xM"%T { >R( 8/#|E e.printStackTrace (); D,MyI# } Q(lku"U'
RXBb:f 3@&bxYXm return n; d4%dIR) } N6h1|_o $Z/klSEf ;P3>>DZ } 0Qm"n6NQ ]$3+[9x' B]1HS`*7 /* QjLji+L **SiteInfoBean.java !L77y^oV */ &ik$L!iX package NetFox; DR6]-j!FK B#]_8svO Yb}w;F8( public class SiteInfoBean { mG_BM/$ gA_krK,Z s|Zx(.EP private String sSiteURL; //Site's URL 8zZSp private String sFilePath; //Saved File's Path ^;zWWg/d private String sFileName; //Saved File's Name en>9E.?N private int nSplitter; //Count of Splited Downloading File s;J\Kc?"| ]c}=5m/ ymtd>P" public SiteInfoBean() :7\9xH {//nSplitter的缺省值为5 h4Ia>^@ //default value of nSplitter is 5 B20_ig: this("","","",5); +vz`go } 2/@D7>F&g >\ZR*CS k5@d! }#c public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) 8a9RML}G< { =<{ RX8 sSiteURL= sURL; {rC~P sFilePath = sPath; S8%n .<OB sFileName = sName; u?kD)5Nk this.nSplitter = nSpiltter; ~s#e,Kav" :M j_2 kM!V.e[g } ?>V6P_r> Tr&E4e o'Pu'y public String getSSiteURL() A
W)a">| { t[EfOQ return sSiteURL; &!jq!u$( } c&f
y{}10 !%xP}{(7 ' "'Btxz public void setSSiteURL(String value) H] k'?; { jJ~Y]dQi sSiteURL = value; zE`R,:VI } 0+EN@Y^dAV Uki9/QiX> 8Bpip public String getSFilePath() .^[_V { .$Bwb/a return sFilePath; B,_`btJh } $b>}C= gt HM&1yubh# MdC<4^| public void setSFilePath(String value) K;U39ofW { kX[fy7rVt sFilePath = value; `tE^jqrke5 } O"*`'D|hK ni6r{eSQ 2yKz-"E public String getSFileName() $%PVJs { D|_V<' return sFileName; gWrAUPS[ } %y"J8;U vG
Vd "+|L_iuNQ public void setSFileName(String value) s&'BM~WI { !gH9 ay sFileName = value; ~O;y?]U } mJC3@V
s PJgp+u< #U=;T]!'$ public int getNSplitter() \t3qS
eWc/ { *
OsU Y=; return nSplitter; o>c^aRZ{ } #SkX@sl@ 8g*hvPc *7" L]6 public void setNSplitter(int nCount) 4_LQ?U>$ { #Qbl=o4 nSplitter = nCount; '#Dg8/r! } {J]-<:XD } YQgNv` l} ],lV}Mlg* |d7$*7TvV /* }+RB=#~o **Utility.java 6)e5zKW!? */ ?znSx}t package NetFox; `cr(wdvI [pgZbOIN37 ] hE="z=n public class Utility { 4nkE IZ v27Ja .tA 7@~tVxB; public Utility() R1ktj { fSA)G$b] nl1-kB)$e| 61_f3S(u } Vq ^]s$' !gP0ndRJ= //线程睡眠 Yck~xt&] public static void sleep(int nSecond) q\$6F)ha3 { cxP6-tV% try{ c
~Fdx Thread.sleep(nSecond); naNyGE7) } TJy4<rb catch(Exception e) }$gmK { M>l^%` e.printStackTrace (); R,Oe$J< } {6
.o=EyM{ } \cuS>G x<B'.3y //日志 *'ZN:5%H public static void log(String sMsg) ?m;;D'1j { RuAlB* System.err.println(sMsg); Kt/)pc } AQ{zx1^2>K V#83! 3HiFISA* public static void log(int sMsg) Z=+03 { `/Y+1 aD System.err.println(sMsg); q'S
=Eav8 } X-JV'KE}^z } w1|Hy2D`0 MZv\ C i$UQbd /* HJhH-\{@ **TestMethod.java S>_27r{ */ ;-@= package NetFox; }zMf7<C B|o%_:]+E >a>fb|r public class TestMethod { {0yu
Xm_$
dZ smU4jh9S public TestMethod() $v27]"] { ///xx/weblogic60b2_win.exe 0 bSA_ try{ cF+ X,]=6 SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); 6*XM7'n //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); svhrf;3: SiteFileFetch fileFetch = new SiteFileFetch(bean); (f1M'w/OD fileFetch.start(); V@ :20m } +=3CL2{An catch(Exception e){e.printStackTrace ();} 9$l>\.6 ``QHG&$/ 0[a}n6XTk } P-Su5F 2x}6\t /c-nE3+rn public static void main(String[] args) ,Og4
?fS { _ PWj(}); new TestMethod(); ]/dVRkZeAE } TKI$hc3|L } D`o<,Y 点击下载更多相关资料
|