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/* E.zYi7YUKK **SiteFileFetch.java &V ^ */ n',9#I(!L package NetFox; jWO&SW so import java.io.*; )D6'k{6 M import java.net.*; sp=7Kh?|> u`L!za7fi V{a}#J public class SiteFileFetch extends Thread { Mdy0!{d S?,KgMVM [FeJ8P>z SiteInfoBean siteInfoBean = null; //文件信息Bean mlsvP%[f. long[] nStartPos; //开始位置 vkNZ -`+I long[] nEndPos; //结束位置 IxK 3,@d FileSplitterFetch[] fileSplitterFetch; //子线程对象 ZYl-p]\*y long nFileLength; //文件长度 6I5[^fv45G boolean bFirst = true; //是否第一次取文件 )Ta]6 boolean bStop = false; //停止标志 YKs^%GO+ File tmpFile; //文件下载的临时信息 \pBYWf DataOutputStream output; //输出到文件的输出流 n##w[7B* /jK17}j //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) it/C y\f public SiteFileFetch(SiteInfoBean bean) throws IOException ]XpU'/h>q; { }R(0[0NQe- siteInfoBean = bean; ~]6Oz;~<3 //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); 0IT20.~ tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); fmZzBZ_ if(tmpFile.exists ()) Q9 x` Uy { {=pP`HD0 bFirst = false; z</XnN read_nPos(); N~Sue } ~,`\D7Z3 else YDZ1@N}^B { L&3Ar' nStartPos = new long[bean.getNSplitter()]; !)51v { nEndPos = new long[bean.getNSplitter()]; W~+!"^<n } g[D,\ zn?a|kt '%eaK_+7 ^}Dv$\;6 } |+$j(YuH h!t2H6eyF p[k9C$@e} public void run() +"N<- { ~YT>:Np //获得文件长度 (`uC"M Lk //分割文件 n_!]B_Vd$ //实例FileSplitterFetch 4%c7#AX[T //启动FileSplitterFetch线程 &s6(3k //等待子线程返回 :+Z>nHe try{ =Y=^]ayO/ if(bFirst) 46.q anh { I;|5C=! nFileLength = getFileSize(); [u9S+:7" if(nFileLength == -1) B#Oc8`1Y { !!D:V`F/d System.err.println("File Length is not known!"); /KJx n6 } MR l*rK else if(nFileLength == -2) /S=;DxZ,r { 2}xFv2X System.err.println("File is not access!"); NdED8 iRc } s_Ge22BZ else 1+PNy d { gp|7{}Q{ for(int i=0;i<nStartPos.length;i++) 'k(~XA}X: { Q+%m+ /Zq nStartPos = (long)(i*(nFileLength/nStartPos.length)); ~1wdAq`'a } >FMT#x t for(int i=0;i<nEndPos.length-1;i++) TF}4X;3Dsy { \ /X!tlwxh nEndPos = nStartPos[i+1]; WHD/s } NId~|&\ nEndPos[nEndPos.length-1] = nFileLength; mGyIr kE } oE|{|27X } {dSU
\': iR}i42Cu 7+Jma! o //启动子线程 2M(PH]D fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; BoiIr[ ( for(int i=0;i<nStartPos.length;i++) kvO`]>#;$? { %N_S/V0` fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), Ll E_{||h siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), J/P@m_Yx nStartPos,nEndPos,i); +EB,7<5< Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); 0.+Z;j fileSplitterFetch.start(); g9r5t'; } W0?Y%Da(4m // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), 51(`wo>LS siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); B6!<@*BI // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", IkXKt8`YVA nEndPos = " + nFileLength); |EEz>ci // fileSplitterFetch[nPos.length-1].start(); S
bqM=I+ p~zTRnm a518N*]j //等待子线程结束 o!_; H}pq //int count = 0; Q j~W-^/ - //是否结束while循环 (9[C0e S boolean breakWhile = false; G>{:D'# p$!+2=)gY s"Pk-Dv while(!bStop) i\R\bv[9 { Ai_|) write_nPos(); q!h*3mNm Utility.sleep(500); )b2E/G@X& breakWhile = true; yW=hnV{ `R=_t]ie 9oau_Q# for(int i=0;i<nStartPos.length;i++) )1yUV*6 { ujHzG}2z if(!fileSplitterFetch.bDownOver) ZtK%b+MBP { p 2f
WL breakWhile = false; =`.5b:e break; $=g.-F%*= } rxK[CDM, } d~f0]O if(breakWhile) 9qO:K79| break; rpP+20 v YHv,Z|.w MVU'GHv //count++; iO= uXN1g //if(count>4) qxCL // siteStop(); 2d J)4 } `r0
qn'* n7!Lwq2 lJQl$Wx^ System.err.println("文件下载结束!"); 7)It1i- } \U => catch(Exception e){e.printStackTrace ();} 28qWC~/9 } 8 P y_Y> DdZ_2B2 `YU:kj<6 //获得文件长度 \7w85$ public long getFileSize() 5}^08Xl { L5|;VH int nFileLength = -1; SE-, 1p try{ XK9*,WA9r URL url = new URL(siteInfoBean.getSSiteURL()); ~9jP++& HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); &IPK5o, httpConnection.setRequestProperty("User-Agent","NetFox"); 73Zs/ Nm :lC%>X GN"LU>9| int responseCode=httpConnection.getResponseCode(); GQAg
ex)D if(responseCode>=400) ^|12~d_.T { Y%cA2V\#m processErrorCode(responseCode); 7Z :l;%]K return -2; //-2 represent access is error P*=3$-` } l8Iy03H 7(iRz hQLx"R$ String sHeader; E0%Y%PQ**{ F"? *@L ?BZ`mrH^ for(int i=1;;i++) X1QZEl { k#G7`dJl //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); (dnc7KrM //Utility.log(in.readLine()); K]Cs2IpI sHeader=httpConnection.getHeaderFieldKey(i); iK0J{' if(sHeader!=null) >bP7}T { a_MnQ@ if(sHeader.equals("Content-Length")) QF6JZQh< { F&j|Y>m nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); p"
W0$t. break; z`{zqP: } &y wY?ox } e~[z]GLO% else d33Nx)No break; 7027@M?A? } `5jB|r/ } dllf~:b catch(IOException e){e.printStackTrace ();} fszeJS}Dw catch(Exception e){e.printStackTrace ();} &=O1Qg=K AS^$1i: tce8*:rNH Utility.log(nFileLength); mK/P4]9g &jd<rs5} }ZGpd9D return nFileLength; &8L\FAY0%9 } TTak[e&j3 3Ya6yz k$- q;VI //保存下载信息(文件指针位置) Eu~wbU"% private void write_nPos() JU+'UK630 { KftM4SFbK try{ Pu*UZcXY output = new DataOutputStream(new FileOutputStream(tmpFile)); |VF"Cjw? output.writeInt(nStartPos.length); X,CFY for(int i=0;i<nStartPos.length;i++) LMj'?SuH { nECf2>Yp v // output.writeLong(nPos); N2Hb19/k output.writeLong(fileSplitterFetch.nStartPos); \`# 0,pLr output.writeLong(fileSplitterFetch.nEndPos); HBGA
lZ } %+J*oFwQu output.close(); S*@0%|Q4r } U MIZ:*j catch(IOException e){e.printStackTrace ();} T<GD !j( catch(Exception e){e.printStackTrace ();} 7OHw/-j\ } V2skr_1 [)c|oh% 84cH|j`w //读取保存的下载信息(文件指针位置) 4u7>NQUDu private void read_nPos() RL8wSK { ?saVk7Z[|5 try{ Ka2tr]+s DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); SXF_)1QO\W int nCount = input.readInt(); aBLb i nStartPos = new long[nCount]; L#bQ`t nEndPos = new long[nCount]; ay[*b_f for(int i=0;i<nStartPos.length;i++) GQWTQIl] { d'D\#+%>= nStartPos = input.readLong(); ?"u-@E[m nEndPos = input.readLong(); Ux]@prA q } 1yc@q8 input.close(); E.9k%%X] } |/Z)? catch(IOException e){e.printStackTrace ();} p8J"%Jq} catch(Exception e){e.printStackTrace ();} )S?}huX } H.K`#W& w+P^c| yBKlp08J private void processErrorCode(int nErrorCode) `vBa.)u { i|'t!3I^m System.err.println("Error Code : " + nErrorCode); pSUp"wch } ZK*aVYnu y$NG ..S _.LWc^Sg //停止文件下载 x*)O<K public void siteStop() @U5>w\ { ?Qk#;~\yB bStop = true; )CQ}LbX Zy for(int i=0;i<nStartPos.length;i++) 3Re\ T fileSplitterFetch.splitterStop(); Ev#aMK . %7A7a 4f,x@:Jw } PCjY,O } n3,wwymQ //负责部分文件的抓取 gu&oCT **FileSplitterFetch.java ij5YV3 */ KR0
x[#.* package NetFox; %Ski5q i*j+<R@ `h6W@ROb import java.io.*; b*fflJ import java.net.*; "
z{w^k _r'M^=yx[ 3J<,2 public class FileSplitterFetch extends Thread { {Wo7=aR 1fZ:^|\ 1YL5 ![T String sURL; //File URL bux-t3g7+ long nStartPos; //File Snippet Start Position L;`t%1 long nEndPos; //File Snippet End Position k6S<46}h| int nThreadID; //Thread's ID O ?Tg`] EX boolean bDownOver = false; //Downing is over ?Y* PVx9Y boolean bStop = false; //Stop identical YZ@-0_Z FileAccessI fileAccessI = null; //File Access interface \f#ao<vQm Ymom 0g+f YvX I public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException [*t EHW { v(~m!8!TI this.sURL = sURL; qC1@p?8$ this.nStartPos = nStart; -^DB?j+ this.nEndPos = nEnd; UtN>6$u
nThreadID = id;
jfamuu 7 fileAccessI = new FileAccessI(sName,nStartPos);//定位 B?Skw{& } (%}C Z
ngJ9js @35shLs public void run() wP*Z/}Uum+ { ,jmG!qJb while(nStartPos < nEndPos && !bStop) 3FN? CN] O { 3LREue7Gr RSC-+c6 1 _(foJRr try{ -f=hL7NW URL url = new URL(sURL); /jD'o> HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); KG$2u:n httpConnection.setRequestProperty("User-Agent","NetFox"); ig{5]wZ( String sProperty = "bytes="+nStartPos+"-"; -s"lW 7N^ httpConnection.setRequestProperty("RANGE",sProperty); iXFaQ Utility.log(sProperty); A$cbH. h;->i] -yeT $P&| InputStream input = httpConnection.getInputStream(); ZI7<E //logResponseHead(httpConnection); )RFeF!(" Sqs`E[G* x#D=?/~/Kv byte[] b = new byte[1024]; 3
6
;hg# int nRead; {W]jVh p while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) AK
HH{_ { g:U ul4 nStartPos += fileAccessI.write(b,0,nRead); cht#~d //if(nThreadID == 1) CggEAi~ // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); O;2 u1p'iP } b3+PC$z2h S6]': 1oPT8)[U Utility.log("Thread " + nThreadID + " is over!"); >q`X%&l_ bDownOver = true; "dOzQz*E //nPos = fileAccessI.write (b,0,nRead); eAMT7 2_ } ?F/3]lsggT catch(Exception e){e.printStackTrace ();} *rLs!/[Z_ } )T?ryp3ev } KXJHb{? k&b>-QP6 }8HLyK,4 //打印回应的头信息 i7FEjjGtG public void logResponseHead(HttpURLConnection con) :z\STXq { )c/]
8KU for(int i=1;;i++) @_{"ho { $4&Ql String header=con.getHeaderFieldKey(i); `c(@WK4 if(header!=null) rzu^br9X //responseHeaders.put(header,httpConnection.getHeaderField(header)); ;QYK {3R? Utility.log(header+" : "+con.getHeaderField(header)); U,'n}]=4A3 else :&m(W Z\ break; #=rR[:M } 7F.,Xvw&@ } art{PV4- m|
Z)h{& \
(,2^T'$J public void splitterStop() H<
j+-u4b { L6m'u6:1{ bStop = true; Nu'rn*Y_ } Q *he%@w y_6HQ: wrbDbp1L } =u(fP" |{ yFSL7`p+ ^|Y!NHYH$Z /* -LyIu# **FileAccess.java ze-iDd_y *//文件访问(定位,写) h>wU';5#f package NetFox; bm;4NA?Gg import java.io.*; ]9' \<uR rhrlEf@ gP3[=a"\ public class FileAccessI implements Serializable{ )Ii=8etdv zy|hf<V //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 P1t5-q RandomAccessFile oSavedFile; '&9b*u";x( long nPos; ;>~iCFk]? mS0W@# |K Wh,kJis< public FileAccessI() throws IOException @9-qqU@ { STI8[e7{ this("",0); >2a~hW|, } Sz
=z
TPnO <*[(t;i %X3T<3< public FileAccessI(String sName,long nPos) throws IOException D<MtLwH { \21!NPXH2 oSavedFile = new RandomAccessFile(sName,"rw"); bu]bfnYi9 this.nPos = nPos; GB#7w82 oSavedFile.seek(nPos); d^7<l_u~ ! } !Ej<J&e 8L:0Wp (f)QEho7 public synchronized int write(byte[] b,int nStart,int nLen) FEkx&9] { s[hD9$VB> int n = -1; t?\osPL try{ {S?.bT%& oSavedFile.write(b,nStart,nLen); W+QI
D/ n = nLen; DD1S]m } kW"N~Xw) catch(IOException e) m`/OO;/; { s
SDBl~g e.printStackTrace (); 0:XmReO+k } )lZb=t %EuSP0 `!i>fo~ return n; <*L8kNykK } E:2Or~ NunT1ved PH6uP] } 2'D2>^os j9%=^ZoQj {'/8{dS /* >1YJETysO **SiteInfoBean.java JH 8^ZP:d' */ /wQDcz package NetFox; {J[0UZ6 k{; 2*6b0 V[~/sc ) public class SiteInfoBean { Lr`yl$6 (uSfr]89' S;Vj5 private String sSiteURL; //Site's URL #(OL!B private String sFilePath; //Saved File's Path bS*9eX=K private String sFileName; //Saved File's Name >6c{CYuT private int nSplitter; //Count of Splited Downloading File #<{sP0v* T!8,R{V]4 *cf#:5Nl public SiteInfoBean() SO|$X {//nSplitter的缺省值为5 p?5zwdX+` //default value of nSplitter is 5 "_lSw3 this("","","",5); ?Pa5skqR } I'JFt>] `U(FdT kxh
$R> public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) KcHW>IBxdv { `On%1%k8 sSiteURL= sURL; :V&#Oo sFilePath = sPath; -LUKYGBK sFileName = sName; /)j:Y:5 this.nSplitter = nSpiltter; {a(TT)d $. Ih- z hS\|tI } n;[d{bU 06ZyR@.@v uT_bA0jK public String getSSiteURL() lwSA!W { k/>k&^? return sSiteURL; Z<`QDBN"4 } 3qP!
(* nBR4j?':i yN9/'c~ public void setSSiteURL(String value) />H9T[3= { #}o*1 sSiteURL = value; }5`Kn}rY } L^dF
)y? Y-v6xUc{F (m13
ong public String getSFilePath() `j9 ;9^ { A2..gs/ return sFilePath; arm26YA-, } X-=49) fTMn EW]rD public void setSFilePath(String value) #V@[<S2 { 4PR!OB sFilePath = value; Lc=t,=OhGe } m;'ebkq w=,bF$:fIW S/V%<<[>p] public String getSFileName() 9J*.'Y { K9]L>Wj return sFileName; ",Mr+;;:[ } Dc2H<=]; \<TWy&2& +xp)la. public void setSFileName(String value) m9 1Gc?c { @kd`9Yw sFileName = value; h:xvnyaI } <v%Q|r 0-6rIdDTM :pq+SifP public int getNSplitter() -e(e;e { `p#tx.o return nSplitter; 8MU+i%hd } I;FHjnn( EV/DJ$C } )\Am:?RH; public void setNSplitter(int nCount) B 1jeIk, { -%,=%FBi~4 nSplitter = nCount; yw\Q>~$n[= } {OIB/ } =bgWUu\F kntYj}F( W[/Txc0$ /* ]Q$S ei5 **Utility.java }p5_JXBV */ Kl_(4kQE_ package NetFox; 3$G &~A{ g8kS}7/ >cJix
1 public class Utility { 0fu*}v" 8
kvF~d
; z9Z4MXl public Utility() \(_(pcl { /*P) C'_M $O3.ex V @CMEmgk~ } "zj[v1K9-A T[Lz4;TRk5 //线程睡眠 [n4nnmM public static void sleep(int nSecond) Wz%H?m:g# { [4w*<({* try{ agt/;>q\~ Thread.sleep(nSecond); Hsn'" } C~Hhi-Xl) catch(Exception e) zX lcu_rc { .exBU1Yk@ e.printStackTrace (); uP G\1 } ml@;ngmp. } `J]e.K u8.F_'` z //日志 _AzI\8m public static void log(String sMsg) y4U|~\] { >
a;iX.K System.err.println(sMsg); zzK<>@c } 90#* el 4O<sE@X R:4@a ':H public static void log(int sMsg) ]"}BqS0 { hjyM xg;Q? System.err.println(sMsg); By waD? } _B>'07D0 } }yVx"e) .' }jd# O uNPD q% /* ?r0rY? **TestMethod.java `WIZY33V */ , #=TputM package NetFox; }`kiULC'= A'BqNsy {n|ah{_p| public class TestMethod { "AU.Eh"-1 nNq<x^@83 D=Q.Q public TestMethod() >$7x]f { ///xx/weblogic60b2_win.exe hr;^.a^ try{ ;plBo%EBV SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); )X?oBNsj //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); Mgr?D SiteFileFetch fileFetch = new SiteFileFetch(bean); "\i H/ fileFetch.start(); U0t|i'Hx } fcxg6W' catch(Exception e){e.printStackTrace ();} P0y DL:X[ v^ "qr?3V BBM[Fy37!} } ,`JYFh M sC.b'1P -'Ay(h public static void main(String[] args) rRg,{:;A { D'<L6w` new TestMethod(); R\|,GZ!`+ } hw,nA2w\ } Vm|KL3}NRv 点击下载更多相关资料
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