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/* q' **SiteFileFetch.java ~t,-y*= */ `;R
[*7 package NetFox; -:P`Rln import java.io.*; A
$GiO import java.net.*; x392uS$# )Z.M(P Ev)aXP public class SiteFileFetch extends Thread { 8A,="YIt hj*Fn 6tDCaB SiteInfoBean siteInfoBean = null; //文件信息Bean 'a6:3* long[] nStartPos; //开始位置 F VVpyB| long[] nEndPos; //结束位置 ~=#jr0IZ FileSplitterFetch[] fileSplitterFetch; //子线程对象 l}aJRG6U long nFileLength; //文件长度 ~|!f6= boolean bFirst = true; //是否第一次取文件 .%3qzOrN boolean bStop = false; //停止标志 ywl7bU-f File tmpFile; //文件下载的临时信息 !J%m 7A DataOutputStream output; //输出到文件的输出流 AY~~ a)V eN?:3cP#l //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) Fu/{*4 public SiteFileFetch(SiteInfoBean bean) throws IOException 2TZ+R7B? { OBBEsD/bc siteInfoBean = bean; MV,;l94?%= //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); ud@7%% tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); wRLj>nc if(tmpFile.exists ()) &qP@WFl { xn`<g|"# bFirst = false; d O' apey read_nPos(); ==W`qC4n?n } %x5zs ]4^ else ]L?DV3N { SB<09|2 nStartPos = new long[bean.getNSplitter()]; UB7H`)C} nEndPos = new long[bean.getNSplitter()]; Dn9AOi! } Ac@zTK6> DX$zzf {+.ai8 ~
""?: } zV<vwIUrr 9"RGf 1] 1X45~ public void run() Q x]zz4jD { .^}
vDA //获得文件长度 u3XQ<N{Gj //分割文件 `Y5{opG7- //实例FileSplitterFetch wzka4J { //启动FileSplitterFetch线程 3|FZ!8D //等待子线程返回 V.8pxD5s try{ uSRvc0R\ if(bFirst) 0k7kmDW { .!&S{;Vv?W nFileLength = getFileSize(); + mqz)-x if(nFileLength == -1) Wz^M*=, { K#LG7faj System.err.println("File Length is not known!"); e[8AdE } ]rs7%$ZW else if(nFileLength == -2) J% t[{ { YhzDi>hob System.err.println("File is not access!"); 1D pRm( } 1Z+\>~8 else .-(s`2 { >[U.P)7; for(int i=0;i<nStartPos.length;i++) @}^eyS$|! { 7rdPA9 nStartPos = (long)(i*(nFileLength/nStartPos.length)); "Y7
]t:8 } /h!Y/\ kI for(int i=0;i<nEndPos.length-1;i++) \s[/{3 { M-B - nEndPos = nStartPos[i+1]; ).Ei:/*j } xzRs;AXOp nEndPos[nEndPos.length-1] = nFileLength; J:c]z9&! } .$k2.-k } #1v>3H( w<uK-]t JmR)
g //启动子线程 ;{Sgv^A fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; i~k9s for(int i=0;i<nStartPos.length;i++) VS:UVe { N9M''H*VS fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), #]@<YKoV{ siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), O;ty
k_yM nStartPos,nEndPos,i); -UPlQL Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); ZL-YoMHc+_ fileSplitterFetch.start(); G|p3NhLgO= } {c3u!}mW // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), nA\9UD<G. siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); W:8*Z8?7 // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", n tfwR#j nEndPos = " + nFileLength); .o2]ndT/J // fileSplitterFetch[nPos.length-1].start(); nVTCbV b$24${*' r*'X ]q|L+ //等待子线程结束 }Ot
I8;> //int count = 0; ;Ly(O'9 //是否结束while循环 $hkMJ),T~ boolean breakWhile = false; buXPeIo^VM NdS6j'%B@7 1D0_k while(!bStop) >t/P^fr_F { K$H>/*&'~ write_nPos(); s{- `y`JP Utility.sleep(500); G n_AXN breakWhile = true; $Yr'`(Cbc ,6zH;fi ? 9.V@+i for(int i=0;i<nStartPos.length;i++) r3@Q(Rb { z|Hc=AU8y if(!fileSplitterFetch.bDownOver) .oJs"=h:m { ;BEg"cm breakWhile = false; rpgr5> break; r|XNS>V ,$ } 0,T'z, } yn0OPjH if(breakWhile) Ty"OJ break; EBY=ccGE{ XIu3n9g^# S^@I4Z //count++; jhWNMu //if(count>4) rx*1S/\PPc // siteStop(); o|7]8K= } h^P>,dy0 \8uPHf_ G\\zk System.err.println("文件下载结束!"); 8t$a8 PE } GfAt-huL( catch(Exception e){e.printStackTrace ();} y)W.xR } +e0]Y8J{ g1Q^x/ qy`95^ //获得文件长度 ExDH@Lb public long getFileSize() }b+tD3+ { R|T_9/#) int nFileLength = -1; rl^_RI try{ 29K09 0f URL url = new URL(siteInfoBean.getSSiteURL()); [=Wn7cr HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); IKM=Q.
7j httpConnection.setRequestProperty("User-Agent","NetFox"); "HW~|M7>( jg?B][ D-.XSIEMu int responseCode=httpConnection.getResponseCode(); )-824?Nl: if(responseCode>=400) k/vE| { $;%-<*Co processErrorCode(responseCode); "v-\nAu return -2; //-2 represent access is error 9YMUvd,u } m :ROq ,UQ4`Mh^L uXuMt
a*Y String sHeader; Hw34wQX x`^~|Q guv)[:cd; for(int i=1;;i++) yzhr"5_ { {A4"KX(U //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); I<*U^e //Utility.log(in.readLine()); 8=Di+r sHeader=httpConnection.getHeaderFieldKey(i); b1>%%# if(sHeader!=null) lhAwTOn`Q {
SX|b0S, if(sHeader.equals("Content-Length")) OvU]|4h { CD(2A,u)/ nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); x+(h#+F break; w}<BO>
z } JoA^9AYhR } i% k`/X; else )`Tny]M break; s4lkhoN\t } AFL* a* } ^r^cMksB* catch(IOException e){e.printStackTrace ();} w-[WJ:2. catch(Exception e){e.printStackTrace ();} #KZ- "$ nH*U j& f-yc'i- Utility.log(nFileLength); Ul OoMGg 7ZS5u+o
N\DEY] return nFileLength; =35^k-VS } wQ[~7 ,o 3*64)Ol7t] DqrS5!C //保存下载信息(文件指针位置) :{%6<j private void write_nPos() {AqN@i { =jip* E^ try{ o87. ( output = new DataOutputStream(new FileOutputStream(tmpFile)); URmx8=q output.writeInt(nStartPos.length); (7`&5md for(int i=0;i<nStartPos.length;i++) #ldNWwvRGj { gIep6nq1`| // output.writeLong(nPos); Bm"jf] output.writeLong(fileSplitterFetch.nStartPos); k&ujr:)5Y5 output.writeLong(fileSplitterFetch.nEndPos); Jg3}U j2By } /s
uz>o\ output.close(); g=Q#2/UQ< } iN5~@8jAzz catch(IOException e){e.printStackTrace ();} 3zY"9KUN catch(Exception e){e.printStackTrace ();} 5 |{0|mP } {w}PV5< ^%|{>Mz;c m!a<\0^ //读取保存的下载信息(文件指针位置) YMad]_XOP private void read_nPos() O[3J Px { fXvJ3w( try{ C78YHjy DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); Yn[y9;I{ int nCount = input.readInt(); bV|:MW<Wv nStartPos = new long[nCount]; /"tVOv# nEndPos = new long[nCount]; _sbZyL for(int i=0;i<nStartPos.length;i++) "T?%4^:g { 8},!t\j#] nStartPos = input.readLong(); /cexd_l|f nEndPos = input.readLong(); !0`44Gbq } Qr1%"^4 input.close(); bw9a@X } :e ?qm7 cB catch(IOException e){e.printStackTrace ();} [zn`vT catch(Exception e){e.printStackTrace ();} ,'m<um } -lRXH7|X Sb> ;k(;`: "]JE]n}Ulg private void processErrorCode(int nErrorCode) fOm=#:O { BM&95p System.err.println("Error Code : " + nErrorCode); j!iimdq } Uc!}D "X's>uM POfvs] //停止文件下载 Ui@Q&%b public void siteStop() ,xuqQ;JX { <<6i6b bStop = true; 3%|LMX]M5_ for(int i=0;i<nStartPos.length;i++) U
PGS fileSplitterFetch.splitterStop(); ~A}"s-Kq5 WM*[+8h 0SwWLq } o>311(: } NcZ6!wWdE //负责部分文件的抓取 `]#D dJ_| **FileSplitterFetch.java )/HSt%> */ lV]hjt-L
2 package NetFox; L10Vq}W" z^gf@r ha1 J^e import java.io.*; 1mwb&j24n3 import java.net.*; pi q%b] aU<0<Dx xv]P-q0 public class FileSplitterFetch extends Thread { m%m/#\J E "uDLty?*k 7C9qkQ
Jqn String sURL; //File URL ]t\fw' long nStartPos; //File Snippet Start Position i{I'+%~R long nEndPos; //File Snippet End Position 1>c`c]s3 int nThreadID; //Thread's ID 6{8qATLR boolean bDownOver = false; //Downing is over fa8vY boolean bStop = false; //Stop identical ZtlF]k:MV FileAccessI fileAccessI = null; //File Access interface B%6>2S=E Os?G_ziIB Jt43+] public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException T|GRkxd,E3 { &dp(CH<De this.sURL = sURL; <8|vj2d2 this.nStartPos = nStart; -A(]",*J this.nEndPos = nEnd; Fx~=mYU nThreadID = id; ^6Q(he fileAccessI = new FileAccessI(sName,nStartPos);//定位 I;qeDCM } @2v L'6 )a.w4dH j/TsHJ= public void run() 36,qh.LKn { FTI[YR8?Y while(nStartPos < nEndPos && !bStop) Xt(w+ { Bcg\p} 0t*JP bmr.EB/ try{ \om$%FUP URL url = new URL(sURL); *LOpbf HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); vRp =L54z httpConnection.setRequestProperty("User-Agent","NetFox"); !lG5BOJM String sProperty = "bytes="+nStartPos+"-"; ;J Dn1(6 httpConnection.setRequestProperty("RANGE",sProperty); ZMids"Xdf Utility.log(sProperty); ? ;i O \CM/KrCR rBye%rQRq InputStream input = httpConnection.getInputStream(); 'b]GcAL //logResponseHead(httpConnection); PEW^Vl-6q 3kx/Q# %k_R;/fjW byte[] b = new byte[1024]; 6AKH0t|4 int nRead; N&K:Jp while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) P6&@fwJ< { 9eo$Duws nStartPos += fileAccessI.write(b,0,nRead); Bf~ //if(nThreadID == 1) v3x_8n$C9 // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); "X4OUk } \\AufAkJ /)ps_gM ~cbq5|| Utility.log("Thread " + nThreadID + " is over!"); r&@#,g bDownOver = true; !FX0Nx=oi //nPos = fileAccessI.write (b,0,nRead); }` E5I&r4 } r"d/9 catch(Exception e){e.printStackTrace ();} vz#VW } 2>Hl=bX } ~McmlJzJG -^]8wQU 4G"T{A`O //打印回应的头信息 Y*/:IYr` public void logResponseHead(HttpURLConnection con) >&6pBtC_ { lM`M70~ for(int i=1;;i++) HhDiGzOSi { [g`9C!P-G String header=con.getHeaderFieldKey(i); ~B;kFdcVXn if(header!=null) ()e.J //responseHeaders.put(header,httpConnection.getHeaderField(header)); NNLZ38BV7 Utility.log(header+" : "+con.getHeaderField(header)); hNgbHzW else 3/>T/To&2 break; 3}e-qFlV8, } (JHzwI8+ } {G&*\5W ~XQj0' z )s{>^D public void splitterStop() =Ryh@X& { 0h/gqlTK1 bStop = true; 649{\;*4 } O32p8AxEz 7ZarXv
z RAYDl=} } Ss6mN;&D )'3(=F$+l *@/1]W /* >
2_xRn<P **FileAccess.java nt.A X *//文件访问(定位,写) gEcRJ1Q;C package NetFox; 0NrUB import java.io.*; x>:~=#Vi kx&Xk0F_g 95LZG1]Rb public class FileAccessI implements Serializable{ .|W0B+Z8 qn)
VKx= //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 Br^4N9 RandomAccessFile oSavedFile; h&@A'om~ long nPos; hG51jVYtw WO$9Svh8 lZ]x #v public FileAccessI() throws IOException ~Sy/q]4ys* { C".nB12 this("",0); 7i^7sT8t } +g/TDwyVH K;kaWV )y>o;^5' public FileAccessI(String sName,long nPos) throws IOException A+Uil\% { 7^1yZ1( oSavedFile = new RandomAccessFile(sName,"rw"); GF4k this.nPos = nPos; jZwv!-: oSavedFile.seek(nPos); r:pS[f|4\ } BkywYCWZ ) v:/+OzY <ua` WRQr public synchronized int write(byte[] b,int nStart,int nLen) 7>
~70 { C>l{_J)n int n = -1; w_zUA'n+ try{ v
C,53g oSavedFile.write(b,nStart,nLen); {Yq"%n'0 n = nLen; D1w;cV7/d } t!}QG"ma catch(IOException e) `y"(\1 { \l)Jb*t e.printStackTrace (); <X>lA } Tx+!D'> ^G:}%4 tYb8a return n; M"XILNV-~ } Ek' ~i vbFi#|EU YY{0WWua } w5/`_m! ^(}D O5rHN;\_ /* d_t> **SiteInfoBean.java f3r\X */ RLy2d'DS package NetFox; U&F1}P$fb !4;A"B( #kGgzO public class SiteInfoBean { 18`YY\u( WG~|sLg MTnW5W-r9 private String sSiteURL; //Site's URL kHWW\?O private String sFilePath; //Saved File's Path oe (})M private String sFileName; //Saved File's Name +/"Ws'5E private int nSplitter; //Count of Splited Downloading File @*Y"[\ "$ mGZJ$ | [N@t/^gRC public SiteInfoBean() 11"- taWj {//nSplitter的缺省值为5 4lM)ZDg //default value of nSplitter is 5 ^|^yw gK this("","","",5); 5OJ8o>BF } Bqcih$`BVU ;`")3~M3* z (1zth public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) g3V
bP { `EBI$;! sSiteURL= sURL; VL =1 9[ sFilePath = sPath; J\@ r~x5G sFileName = sName; YLXLaC[ this.nSplitter = nSpiltter; c[IT?6J4 kT-dQ32 o"kVA;5<G } 0 _n
Pq W?>C$_p C )a7nr<)aU public String getSSiteURL() KF .O>c87& { @~=*W5 return sSiteURL; Vx
Vpl@ } }]<Ghns ]2_b_ok ^
gMkQYo(# public void setSSiteURL(String value) (yJY/| { =%)Y,
)" sSiteURL = value; u# TNW. } VxP cC+ Tqf:G4! =K\xE" public String getSFilePath() **G5fS.^W { gh?3 [q6 return sFilePath; /!i`K{ } 4\_~B{kzZ BNw};.lO hEh` cBO public void setSFilePath(String value) uGc0Lv4i/ { IDY2X+C#U sFilePath = value; ` ;}w!U } "*bP @W mXPA1#qo mx!EuF$I public String getSFileName() p9y@5z { X
T<SR] return sFileName; 5%jy7)8C } ^$AJV%3wI KSYHG _2a)b(<tF public void setSFileName(String value) hh[@q*C { )Tl]1^ sFileName = value; 1xD?cA\vu } R*`=Bk0+ 1KadT7<0} xG1(vn83gq public int getNSplitter() S8,e`F { ,Dy9-o return nSplitter; ,@]*Xgt= } _B?Hw[cc
0aqq*e'c ;U&~tpd public void setNSplitter(int nCount) E*vh<C { .O&[9`"' nSplitter = nCount; DP.Y<V)B } 2w;Cw~<=d } ~='}(Fg: W) ?s''WE; %%T?LRv /* +&4@HHU{G **Utility.java (5l'?7 */ jfU$qo!gi package NetFox; w&>*4=^a .^wBv
'Y _/NPXDL public class Utility {
tRbZX{ F*JbTEOn tI<6TE'!p# public Utility() L>n^Q:M { T[- %b9h> pD]2.O XG!^[ZDs } zgl$ n ]zz%gZz //线程睡眠 KP_7h/e public static void sleep(int nSecond) &],O\TAul { ~g}blv0q+B try{ eB9F35[ Thread.sleep(nSecond); +bk+0k9k5 } i(4.7{* catch(Exception e) QN;GMX5& { ]l}bk] e.printStackTrace (); 5`QfysR5 } epI~w } y*E{X LhSXz>AX //日志 Mehp]5* public static void log(String sMsg) USJ4Z { ]/|DCxQ System.err.println(sMsg); s$~H{za } 1
J[z ![Tf TA+#{q+a _TyQC1 d public static void log(int sMsg) OI:T#uk5 { 9hgIQl System.err.println(sMsg); C't%e } !Pu7%nV. } jX,A. M"foP@ ceLr;}?Ws /* knzQ)iv&& **TestMethod.java [OFT!=.y & */ O]l-4X#8F package NetFox; z=4E#y`?U @"iNjqxh +!t *LSF public class TestMethod { Xy9'JVV6 iig&O(, OA7=kH@3c public TestMethod() UJ`%uLR~ { ///xx/weblogic60b2_win.exe @^`5;JiUk try{ G
}M! SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); V3_qqz}`r //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); hP/uS%X SiteFileFetch fileFetch = new SiteFileFetch(bean); nZ`=Up p) fileFetch.start(); {h;i x } 4-\4G"4 catch(Exception e){e.printStackTrace ();} Koz0Xy k,y#|bf,Y
th=45y"C } ?hW(5]p| /sl#M B,Jn.YX public static void main(String[] args) 'IER9%V$ { _K~?{". new TestMethod(); 'v@1_HHW\ } K=2j}IPe } vw` '9~ 点击下载更多相关资料
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