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/* 8b[^6]rM **SiteFileFetch.java 28>gAz.# */ 7b \Hbg Z package NetFox; aXhgzI5] import java.io.*; ]B5q v6 import java.net.*; rpQB#
Pz L6J=m#Ld =K-B
I public class SiteFileFetch extends Thread { m9a(f >C Ca0~K42~ ZlUd^6|:3 SiteInfoBean siteInfoBean = null; //文件信息Bean A"2k,{d long[] nStartPos; //开始位置 OB>Pk_eQK long[] nEndPos; //结束位置 gj0gs FileSplitterFetch[] fileSplitterFetch; //子线程对象 NYm2fFPc long nFileLength; //文件长度 q1.w8$ boolean bFirst = true; //是否第一次取文件 y4w{8;Mh boolean bStop = false; //停止标志 b'3w.%^ File tmpFile; //文件下载的临时信息 #\GWYWkR DataOutputStream output; //输出到文件的输出流 wtu WzHrF *"d" //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) &CV%+ public SiteFileFetch(SiteInfoBean bean) throws IOException ))K3pKyb { ?MHVkGD siteInfoBean = bean; 4'cdV0] //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); c0sU1:e0 tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); y9cW&rDH if(tmpFile.exists ()) BlF>TI%2 { kXFgvIpg< bFirst = false; b*+Od8r read_nPos(); %oJ_,m_( } se:]F/ else /bjyV]N { NldeD2~H nStartPos = new long[bean.getNSplitter()]; =6y4* f nEndPos = new long[bean.getNSplitter()]; $-Lk,}s.* } zWb>y n,!PyJ @T0F }(k "t$c'` } AcqsXBKd O(2)A>} -NHA{?6r public void run() swss#?.se { s5F,*< //获得文件长度 s2FJ^4 //分割文件 z@R:~ //实例FileSplitterFetch 8J-$+ ; //启动FileSplitterFetch线程 :G=N|3 //等待子线程返回 "g;^R/sfq try{ b) "bX} if(bFirst) t:B~P,r { Rf||(KC< nFileLength = getFileSize(); 7s+3^' if(nFileLength == -1) +&6R(7XC { />=)=CGv; System.err.println("File Length is not known!"); ..`J-k } hK5BOq!y else if(nFileLength == -2) tgCEz% { se(ZiyHp System.err.println("File is not access!"); P~HzNC } Q(=} PF else h;?=:( { rtd&WkU
rD for(int i=0;i<nStartPos.length;i++) d:cs8f4> { 2+y<&[A8U nStartPos = (long)(i*(nFileLength/nStartPos.length)); ];P$w.0 } 1$2'N~`#U
for(int i=0;i<nEndPos.length-1;i++) dtD)VNkBZ { e"Kg/*Ji1 nEndPos = nStartPos[i+1]; scZdDbL6+ } E&ou(Q={ nEndPos[nEndPos.length-1] = nFileLength; @0H}U$l } 1AiqB Rs } 8@pY:AY Y7g^ ?6 lf3QMr+ //启动子线程 <Yif-9 fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; E_ #MQ;n for(int i=0;i<nStartPos.length;i++) US3rkkgDO { }q7rR:g fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), <mN.6@*{ siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), `}<x"f7.z nStartPos,nEndPos,i); @Cg%7AF Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); KKB&)R fileSplitterFetch.start(); gx,BF#8} } ^oaFnzJdf // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), x$ z9:'U siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); o,}`4_N|| // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", HQqnJ;ns< nEndPos = " + nFileLength); V/xGk9L~ // fileSplitterFetch[nPos.length-1].start(); .H;[s Vm\ly;v'R QCjC|T9 //等待子线程结束 'e
@`HG
//int count = 0; TrA&yXXL //是否结束while循环 I2"F2(>8K boolean breakWhile = false; ;>%@ P|c[EUT g+'=#NS} while(!bStop) ai|d`:; { D2<(V,h9 write_nPos(); Lso4ZZ; Utility.sleep(500); BOqu$f+ breakWhile = true; b7;`A~{9v "%^T~Z(_j jFAnhbbCE for(int i=0;i<nStartPos.length;i++) Lc L|'S) { m+&)eQ: if(!fileSplitterFetch.bDownOver) ~\HGV+S!g} { N_<wiwI< breakWhile = false; bp"@vlv break; 21k^MZ } m][i-|@M } ,gY bi-E if(breakWhile) NHI(}Ea|] break; jNjm}8`t y$-;6zk\] fSR+~Vy //count++; x$p_mWC //if(count>4) M`m-@z // siteStop(); BF >678h } D=ZH? d V!^5#A< :&59N^So| System.err.println("文件下载结束!"); W#^W1j>_G } (tY0 /s catch(Exception e){e.printStackTrace ();} uB&um*DP } 0 Z{;sW |/!3 N c-s A?q#| //获得文件长度 ^)wTCkH&y public long getFileSize() ONr}{T%@/ { 8Qm%T7]UFb int nFileLength = -1; k+nfW]UNF try{ ~6bf-Wg'X URL url = new URL(siteInfoBean.getSSiteURL()); Ih RWa|{I HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); l:Hm|9UZ httpConnection.setRequestProperty("User-Agent","NetFox"); .A6i?iROe IZw>!KYG VDnN2)Km* int responseCode=httpConnection.getResponseCode(); wgETL|3- if(responseCode>=400) 98Dg[O { o=%pR| processErrorCode(responseCode); 3kU4?D] return -2; //-2 represent access is error VgBZ@*z(x } Ej;BI#gx= {`KRr:w !t.*xT4W String sHeader; 1\XR6q:2 8Pgw_ 21N1 PjxZ3O for(int i=1;;i++) s28t' { &-e@Et`Pg //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); B_ x?s //Utility.log(in.readLine()); V DN@=/ sHeader=httpConnection.getHeaderFieldKey(i); Gt|m;o if(sHeader!=null) OQ=0>;> { cT&!_g#g if(sHeader.equals("Content-Length")) :_0"t- { 655OL)|cD6 nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); IH2V.>h break; #?^%#"~4H } ].(l^W } GE S_|[Q else m,3H] break; x@aWvrL } eI #b%h } He1hgJ)N catch(IOException e){e.printStackTrace ();} tjId?}\ catch(Exception e){e.printStackTrace ();} jeu|9{iTVu e]!`Cl-f80
gt>k]0 Utility.log(nFileLength); WR<,[*Mv^ OZSM2 ~ c04;2gR return nFileLength; +m>)q4e } s^vw]D y'
r I1eF [t}@>@W| //保存下载信息(文件指针位置) Quts~Q private void write_nPos() pRez${f.(s { .@`5>_ try{ <Na .6P output = new DataOutputStream(new FileOutputStream(tmpFile)); z&Kh$ $)[ output.writeInt(nStartPos.length); y$Rh$eK for(int i=0;i<nStartPos.length;i++) N"zg)MsX { SJai<>k h // output.writeLong(nPos); ~!iZn output.writeLong(fileSplitterFetch.nStartPos); Acl?w }Y output.writeLong(fileSplitterFetch.nEndPos); r:~q{ } +U^H`\EUr output.close(); V/dL-;W; } 7.W$6U5 catch(IOException e){e.printStackTrace ();} ahmxbv3f=5 catch(Exception e){e.printStackTrace ();} t`!@E#VK } oQ{
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//读取保存的下载信息(文件指针位置) &`LR{7m private void read_nPos() ;JHR~ TV { zu!# try{ l2h1CtAU DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); t}X+P`Ovq int nCount = input.readInt(); 12TX_ 0 nStartPos = new long[nCount]; }b/Xui9Q nEndPos = new long[nCount]; OTmw/ #ug for(int i=0;i<nStartPos.length;i++) z[?&bF<| { G|eJac> nStartPos = input.readLong(); G5T( nEndPos = input.readLong();
$*S&i(z } nYE''g+x input.close(); F5s`AjU } QP~Iz*J' catch(IOException e){e.printStackTrace ();} E
5N9.th catch(Exception e){e.printStackTrace ();} =#.qe= } xO0}A1t
Wd <KEVA?0> 1Pp2wpD4iC private void processErrorCode(int nErrorCode) "
Z2D@l { Gl]z@ZXWIw System.err.println("Error Code : " + nErrorCode); Bgf'Hm%r } g><itA? pm>$'z!.): dml,|k= //停止文件下载 >ca w
: public void siteStop() Lyy:G9OV { ~RU-N%Kn bStop = true; mhv ;pM6 for(int i=0;i<nStartPos.length;i++) jG^f_w fileSplitterFetch.splitterStop(); ^$x1~}D M'sq{K9 ZQI;b0C } H9Dw#.em } CYn56eRK //负责部分文件的抓取 1F]jy
**FileSplitterFetch.java 4V7=VZ,@3 */ iw =~j package NetFox; l<8+>W`_ ,\'E<O2T y.,li< import java.io.*; XQI!G_\+C import java.net.*; &S9O:>=* pp1kcrE\M \}EJtux q public class FileSplitterFetch extends Thread { q!Q*T^-rO i0g/'ZP I2^@>/p8\( String sURL; //File URL ?atHZLF long nStartPos; //File Snippet Start Position xO
6$:o- long nEndPos; //File Snippet End Position i@o'Fc int nThreadID; //Thread's ID <o"2z~gv boolean bDownOver = false; //Downing is over YGsg0I't boolean bStop = false; //Stop identical ^EZ?wdL FileAccessI fileAccessI = null; //File Access interface mXJ`t5v^l _`d=0l*8 D`hg+64} public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException 8\BYm|%aa { =j^wa') this.sURL = sURL; BRF4p: this.nStartPos = nStart; 9}<iS w[ this.nEndPos = nEnd; l % 0c{E~ nThreadID = id; 0kxe5*-| fileAccessI = new FileAccessI(sName,nStartPos);//定位 iM +p{/bN } K[R.B!;N .gs:.X)TG9 R&@NFin public void run() 8!|LJI { LLU]KZhtY| while(nStartPos < nEndPos && !bStop) z *~rd2 { +OeoA{-W C%q]o 4O>0gK{w try{ Z,:}H6Mj9 URL url = new URL(sURL); #]}]ZE HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); B]wfDUG httpConnection.setRequestProperty("User-Agent","NetFox"); FKU)# Eo String sProperty = "bytes="+nStartPos+"-"; &.chqP(| httpConnection.setRequestProperty("RANGE",sProperty); ueu=$.^;g Utility.log(sProperty); ~^v*f / 0y5/ a'|/=$
InputStream input = httpConnection.getInputStream(); n|Gw?@CU7 //logResponseHead(httpConnection); &]jCoBj+_ w|(
ix;pK '~n=<Y byte[] b = new byte[1024]; 8ps1Q2| int nRead; >d<tcaB while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) <hB~|a<# { 9HG" }CGZP nStartPos += fileAccessI.write(b,0,nRead); l*]nvd_ //if(nThreadID == 1) 3}x6IM2 // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); RWdx)qj{ } ^KjxQO6y3 4R28S]Gb B/gI~e0 Utility.log("Thread " + nThreadID + " is over!"); :r+F95e bDownOver = true; J 7]LMw7 //nPos = fileAccessI.write (b,0,nRead); K?gO]T{6 } #|;;>YnZ catch(Exception e){e.printStackTrace ();} 22gh,e2o } 6bd{3@ } N7#,x9+E yq,%<%+ .v[!_bk8C //打印回应的头信息 (Z#j^}G_l public void logResponseHead(HttpURLConnection con) {9|S,<9 { sV-UY!
for(int i=1;;i++) Z1sRLkR^ { l^;=0UR_ String header=con.getHeaderFieldKey(i); *$9Rb2}kK if(header!=null) KDu~,P] //responseHeaders.put(header,httpConnection.getHeaderField(header)); *#; Utility.log(header+" : "+con.getHeaderField(header)); Tk:%YS;= else ~NBlJULS break; #waK^B)<a } f (ug3(j } WlRaD%Q #(1R:z\: `(VVb@:o public void splitterStop()
S)W(@R+@4 { cW?~]E'< bStop = true; Qo])A6$IU } 3im2
`n )mE67{YJh~ mL]5Tnc } eGi|S'L' Ep8 y MURHv3 /* Z.3*sp0
yv **FileAccess.java $##LSTA *//文件访问(定位,写) YfJQ]tt1 package NetFox; D~r{(u~Ya import java.io.*; "= >8UR _2rxDd1#. e*hCf5=- public class FileAccessI implements Serializable{ 3TF'[(K= KK41I8Mw //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 L]QBh\ RandomAccessFile oSavedFile; ],w+4;+ long nPos; m}GEx)Y D QR*{}`+l ^s6C']q *O public FileAccessI() throws IOException % QI6`@Y" { FXo{|z3 this("",0); *>J45U(6: } g <5G# A=l1_8,`h =(Wl'iG public FileAccessI(String sName,long nPos) throws IOException _{48s8V { 8e}8@[h oSavedFile = new RandomAccessFile(sName,"rw"); :B1a2Y^" this.nPos = nPos; 0=c:O oSavedFile.seek(nPos); 2hFj+Ay } /V
f L( }W$}blbp xT;j_'9U; public synchronized int write(byte[] b,int nStart,int nLen) .R{+Pz D { Aj "SSX!L int n = -1; 15wwu} X try{ xqLIs:* oSavedFile.write(b,nStart,nLen); D0@d}N n = nLen; ]R6Z(^XT,E } vH/Y]Am catch(IOException e) O*-sSf { ^=Egf?|[ e.printStackTrace (); :IX_}| } cvO;xR <G#z;]N V|G[j\]E< return n; un(fr7NW } q($fl7}Y eW zyydl r!HB""w } Uiu9o]n V SUz+W 2~q(?wY /* R4Si{J*O **SiteInfoBean.java i*ji */ ?Qdp#K]WX package NetFox; ]WZi + .}DL%E`n 4&'_~ qU public class SiteInfoBean { k
ks
?S', :j(D&?ao eKek~U& private String sSiteURL; //Site's URL "i/3m'<2 private String sFilePath; //Saved File's Path S[L2vM) private String sFileName; //Saved File's Name OCYC
Dn private int nSplitter; //Count of Splited Downloading File ybgAyJ{J< AAld2"r IX
y
$ public SiteInfoBean() qD/FxR-! {//nSplitter的缺省值为5 a@U0s+V&a0 //default value of nSplitter is 5 v}-j ls this("","","",5); {GM8}M~D& } SWM6+i
p ]#Q'~X W FAP1Bm public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) hV>@qOl
' { ZeP3
Yjr3 sSiteURL= sURL; }t9A#GOz sFilePath = sPath; 9G=ZB^ sFileName = sName; ky98Bz% this.nSplitter = nSpiltter; {;j@-=pV _=68iDXm L}5IX)#gH } ht@s!5\LK 'c|Y*2@ H-Z1i public String getSSiteURL() HnmByn\j { <u85>x return sSiteURL; kFF)6z:2 } W_z?t; ^7&0Pm yyVv@ public void setSSiteURL(String value) %Lwd1'C% { JdW:%,sv sSiteURL = value; 60St99@O } Ro oem dCM kVu-,OU B)`^/^7 public String getSFilePath() &.t|&8- { ;Z(~;D return sFilePath; hSyA;*)U } U?:<clh IRW%*W# J((.zLvz public void setSFilePath(String value) 8{Id+Q>Vo, { Sk 10"D B/ sFilePath = value; Z/@%MEU[zl } (" +/ : 34P5[j!h 9#AsSbBpf public String getSFileName() @43o4, { >f*[U/{ K return sFileName; LYY|8)Nj2" } Kzd`|+?'`M dQ4K^u ^"d!(npw public void setSFileName(String value) ^v].mV/ { k$7@@?< sFileName = value; !B_?_ a } "nK(+Z
&JpFt^IHi wbaXRvg public int getNSplitter() ceu}Lp^%/ { \4.U.pKY return nSplitter;
ToHCS/J59 } wGC)gW kGZ_/"iuO (]mh}=:KDg public void setNSplitter(int nCount) *0,?QS-a { l&d 6G0 nSplitter = nCount; c=T^)~$$ } O/(qi8En } w*Gv#B9G 3 TN?yP) > Rbgg1^]5 /* *YFe **Utility.java r4~Bn7j2 */ i cf[.
package NetFox; C||A[JOS G'<J8;B*
t Q\~4J1 public class Utility { [k9aY$baT^ $z+iB;x [z:bnS~yiD public Utility() $3!j1 { ZL`G<Mo;. ul e]eRAG F%Lniv/N } Ha\q}~_ !j)H!|R //线程睡眠 lq$1CI public static void sleep(int nSecond) gq6C6 { [Pdm1]":( try{ r'p;Nj. Thread.sleep(nSecond); ,0#5kc*X } 26E"Ui5q catch(Exception e) .d5|Fs~B { gno V>ON0 e.printStackTrace (); W.ud<OKP90 } )T:{(v7 d` } ]rDf3_!m( h@72eav3+ //日志 G^F4c{3c~ public static void log(String sMsg) FhZ&^.: { W9?Yzl System.err.println(sMsg); <4y1[/S } -0Q:0wU
0:**uion :XMw="u= public static void log(int sMsg) aho;HM$hjP { C9/?B: System.err.println(sMsg); 8kih81tx"U } qphN } I~qS6#%r Fz16m7. 8=7u,t /* 2;4Of~ **TestMethod.java qeCx.Z */ ]do0{I%\eq package NetFox; ";j/k9DE +b]g; 6:B[8otQ public class TestMethod { cW,wN~ *&B*/HAN :x97^.eW~ public TestMethod() bG>pm|/ { ///xx/weblogic60b2_win.exe ^" ywltW> try{ ~fs{Ff' SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); f3-=?Z //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); @.-g SiteFileFetch fileFetch = new SiteFileFetch(bean); ,:-S<]fS{_ fileFetch.start(); ;tI=xNre`1 } FpfOxF6A3 catch(Exception e){e.printStackTrace ();} !xMyk>%2 I?"cEp m4ovppC } sRo%=7Z '@HWp 8+ [dsH0 D&T public static void main(String[] args) PBr-<J { Y-n*K' new TestMethod(); YmHn*N}:U } DI9x]CR } HPpKti7g 点击下载更多相关资料
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