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/* _aevaWtEx **SiteFileFetch.java f;^ +q-Q */ pFY*Y>6ar package NetFox; :@i+yN cV import java.io.*; ~'%d]s+q import java.net.*; G/p\MzDko # &.syD# `z'8"s public class SiteFileFetch extends Thread { (|<S%?}J fX`u"`o5 bUS:c
2" SiteInfoBean siteInfoBean = null; //文件信息Bean Oq~{HJ{ long[] nStartPos; //开始位置 Qw2`@P8W long[] nEndPos; //结束位置 )).=MTk FileSplitterFetch[] fileSplitterFetch; //子线程对象 )&_bY~P long nFileLength; //文件长度 Y"bm4&' boolean bFirst = true; //是否第一次取文件 B-N//ef} boolean bStop = false; //停止标志 9JP:wE~y File tmpFile; //文件下载的临时信息 >
f X^NX DataOutputStream output; //输出到文件的输出流 Gt#r$.]W?o y\^zxG*]' //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) bK%F_v3' public SiteFileFetch(SiteInfoBean bean) throws IOException #ae?#?/" { N 62;@Z\7 siteInfoBean = bean; ]|g2V
a~- //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); n{!{,s tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); qI9j=4s. if(tmpFile.exists ()) 6ioj!w<N { Zzjx;SF bFirst = false; ;)FvTm'"\. read_nPos(); uSR%6=$ } _MC',p& else Eh8GqFEM { K>+ v" x nStartPos = new long[bean.getNSplitter()]; uuEvH<1 nEndPos = new long[bean.getNSplitter()]; *d C| X } P?V+<c{ =F_uK7W S|tA%2z k*;U?C! } 5%2~/
" 'S6zk wC] RL4|!HzR public void run()
Culv/ { >P
j#?j*Y //获得文件长度 6<W^T9}v@/ //分割文件 h>!h|Ma //实例FileSplitterFetch HE+' fQ!R //启动FileSplitterFetch线程 \2 DED //等待子线程返回 Ne+Rs+~4 try{ #d % v=.1 if(bFirst) OE(y$+L3_I { D Z*c.|W nFileLength = getFileSize(); Vwp>:'Pu if(nFileLength == -1) y/S3ZJY { ;g?PK5rB( System.err.println("File Length is not known!"); %TFsk } F.y_H#h else if(nFileLength == -2) P
s>Y] { RjVUm+< System.err.println("File is not access!"); ub8d]GZJ } R-zS7Jyox else ,Dv*<La`\ { \uHC 9}0 for(int i=0;i<nStartPos.length;i++) |Jx:#OM { l tNI+G nStartPos = (long)(i*(nFileLength/nStartPos.length)); v+x<X5u } z{3`nd, for(int i=0;i<nEndPos.length-1;i++) h$`m0-' { OiAuL:D nEndPos = nStartPos[i+1]; !q$VnqFk } &w^9#L nEndPos[nEndPos.length-1] = nFileLength; |e#W;q$v } eMdP4<u } -sv%A7i r
jn:E *^@b0f~vj //启动子线程 >uZc#Zt fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; k
76<CX for(int i=0;i<nStartPos.length;i++) CP9 Q|'oJ { UBW,Q+Q fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), y$fMMAN7 siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), W 3/]
2"0 nStartPos,nEndPos,i); ^"<Bk<b( Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); DC).p'0VL fileSplitterFetch.start(); 2<UC^vZ } 6k@F?qHS // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), ]/h$6mrL siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); '['%b // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", FUSe!f nEndPos = " + nFileLength); nL^7t7mp // fileSplitterFetch[nPos.length-1].start(); `%[m%Y9h 4j0;okQWV' DW,ERQ^ //等待子线程结束 L %ac sb} //int count = 0; mN{H^ //是否结束while循环 `&x>2FJ boolean breakWhile = false; L:_{bE|TY S@pdCH, n c[,Rhf while(!bStop) ~1TT ?H { =W')jKe0 write_nPos(); t|V5[n! Utility.sleep(500); ?i0u)<H breakWhile = true; eptw)S-j XC<'m{^(m \'g7oV;>cI for(int i=0;i<nStartPos.length;i++) <
`;Mf>V { [}Xw/@Uc; if(!fileSplitterFetch.bDownOver) Wx#l}nD {
]Z UE ! breakWhile = false; j@nK6`d+1 break; %ho?KU2j } LR.]&(kyd } !_+FuF"@ if(breakWhile) _)pOkS break; +Goh`!$Rj9 |#t^D.j !ck luj //count++; 4J'0k<5S //if(count>4) (ZF~
// siteStop(); HrLws95' } `;G@qp:A Jon3ywd1Y 21<Sfsc$ System.err.println("文件下载结束!"); C+!=C{@7di } Y[b08{/ catch(Exception e){e.printStackTrace ();} .(p_YjIA } P;XA|`& kn$SG d$\n@}8eZp //获得文件长度 1M)88& public long getFileSize() )X *_oH= { f[NxqNn int nFileLength = -1; G?~Yw'R^8 try{ WUYU\J&q3 URL url = new URL(siteInfoBean.getSSiteURL()); rUV'DC?eE HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); Qg1kF^= httpConnection.setRequestProperty("User-Agent","NetFox"); '"%hX&]5 =saRh)EM 6 Yva4Lv int responseCode=httpConnection.getResponseCode(); $5ea[nc if(responseCode>=400) d+h~4'ebv { {LKW%G7 processErrorCode(responseCode); GRj [2I7: return -2; //-2 represent access is error ]n1#8T&<*z } 8:I-?z;S _W Hi<,- V@z/%=PJ String sHeader; 9.
FXbNYg eGKvzu H_8PK$c; for(int i=1;;i++) WuWOC6^ { xG4 C 6s //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); \
D>!& //Utility.log(in.readLine()); x^`P[> sHeader=httpConnection.getHeaderFieldKey(i); LCIe1P2 if(sHeader!=null) USgO`l\}4 { p+nB@fN/ if(sHeader.equals("Content-Length")) B;iJ$gt] { l:~ >P[ nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); }#Ji"e break; w?fq%-6f* } R%t6sbsNv } hE\gXb else (3x2^M8 break; bjwl21;{ } ]~3a ~
} Y2uy@j*N catch(IOException e){e.printStackTrace ();} /viBJ`-O catch(Exception e){e.printStackTrace ();} z6qx9x|Ij k^q~2 6m(+X
MS Utility.log(nFileLength); |1!OwQax iH)vLD s}gdi return nFileLength; HN;f~EQT } -:!T@rV,d gi_f8RP=2a H%>cpwa[7 //保存下载信息(文件指针位置) /sB,)>X
private void write_nPos() 2 jQ?-/Q8# { ?ODBW/{[G try{ ygV-Fv>PQ output = new DataOutputStream(new FileOutputStream(tmpFile)); S[/D._5QD% output.writeInt(nStartPos.length); >"]t4]GVf for(int i=0;i<nStartPos.length;i++) cE,,9M@^ { 1X&scVw // output.writeLong(nPos); "Q.C1#W}. output.writeLong(fileSplitterFetch.nStartPos); rc{F17~vX output.writeLong(fileSplitterFetch.nEndPos); oB!-JX9 } bM
W}.v! output.close(); ,0,&
L } ?[5_/0L,= catch(IOException e){e.printStackTrace ();} up?S (.*B catch(Exception e){e.printStackTrace ();} FSZ :}Q } y>J6)F
= 8Sf}z@~] ~fpk`&nhe //读取保存的下载信息(文件指针位置) DQN"85AIZ private void read_nPos() w*Ze5j4@
\ { cn_KHz= try{ TDR#'i DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); D0gz
(( int nCount = input.readInt(); do< N+iK nStartPos = new long[nCount]; Hg(nC*#/Q nEndPos = new long[nCount]; ]MMXpj,9h for(int i=0;i<nStartPos.length;i++) mFC9\
{ <;Td8T; nStartPos = input.readLong(); ,UT :wpc^i nEndPos = input.readLong(); ~05(92bK } j{%'A input.close(); 8;,(D#p } V\%s)kq catch(IOException e){e.printStackTrace ();} \xk8+= /A catch(Exception e){e.printStackTrace ();} 3=lQZi<]% } cn$0^7? @7Nc*-SM 'yAHB* rQR private void processErrorCode(int nErrorCode) a/q8v P { v`"BXSmp{ System.err.println("Error Code : " + nErrorCode); u9}LvQh_6, } Uv:NY1(3! G'_5UP! i"M$hXO //停止文件下载 =:^f6"p&Z public void siteStop() 2cJ3b
0Xx { N!af1zj bStop = true; iS8yJRy for(int i=0;i<nStartPos.length;i++) u,S}4p&l fileSplitterFetch.splitterStop(); G:PcV_ihx o2riy'~ 3q (]Dg;v } z
2Ao6*% } XV<{tqa //负责部分文件的抓取 } q r
, **FileSplitterFetch.java IqjH */ G]>P!] package NetFox; 5AAPtZ\lH <K~mg<ff$ YjeHNPf import java.io.*; PKNpR import java.net.*; Si[xyG6= uI&<H T? IlP@a[:_ public class FileSplitterFetch extends Thread { ^: V6= (qy82F-|2 x4S0C[k String sURL; //File URL l`<u\], long nStartPos; //File Snippet Start Position 0o&c8?@j long nEndPos; //File Snippet End Position - z"D_5 int nThreadID; //Thread's ID l*4_
boolean bDownOver = false; //Downing is over CEb al\R boolean bStop = false; //Stop identical 6%UhP;( FileAccessI fileAccessI = null; //File Access interface I/w=!Ih pS<j>y xcu:'7'K[ public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException 0VlB7oF { y{uN+QS this.sURL = sURL; vEb_z[gd this.nStartPos = nStart; 9|LV
x3] this.nEndPos = nEnd; 2sqNTuO6,| nThreadID = id; gPM<LO`;i fileAccessI = new FileAccessI(sName,nStartPos);//定位 )XL}u4X } @D&}ZV=J ePwoza
08 aZU public void run() Ft$tL; { ;Quk%6;[N while(nStartPos < nEndPos && !bStop) y@Ga9bI7 { YumHECej g:>Mooxzi "':u#UdS try{ _,9/g^< URL url = new URL(sURL); 6`hHx=L HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); srfM"Lb' httpConnection.setRequestProperty("User-Agent","NetFox"); 3eS
*U`_ String sProperty = "bytes="+nStartPos+"-"; 1Igo9rv httpConnection.setRequestProperty("RANGE",sProperty); =L?(mNHT Utility.log(sProperty); <gc\,P<ru qx3`5)ef FrBJv< InputStream input = httpConnection.getInputStream(); cv/ //logResponseHead(httpConnection); k'$UA$2d `}9j vR5 h\qM5Qx+Q byte[] b = new byte[1024]; SPK%
' s int nRead;
)\r;|DN while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) d|(@#*{T] { -&\?Q_6 nStartPos += fileAccessI.write(b,0,nRead); a8!/V@a //if(nThreadID == 1) N=P+b%%:Z // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); F`\7&'I } ZI'Mr:z4 A#B6]j) 34\:1z+s M Utility.log("Thread " + nThreadID + " is over!"); ^l" bDownOver = true; {:r8X //nPos = fileAccessI.write (b,0,nRead); c'r7sI%Yi } qdeS*rp\ catch(Exception e){e.printStackTrace ();} -P>f2It } ;F!wyTF>} } 4TW>BA AmmUoS\ R@)L@M)u; //打印回应的头信息 Vr=c06a2 public void logResponseHead(HttpURLConnection con) U[ $A=e?\Y { N [iv.B for(int i=1;;i++) ,5L[M&5 { qhiO( !jK String header=con.getHeaderFieldKey(i); OAiip, if(header!=null) g0BJj= //responseHeaders.put(header,httpConnection.getHeaderField(header)); s&7,gWy}BE Utility.log(header+" : "+con.getHeaderField(header)); }6V` U9^g else tu6Q7CjW8 break; oAgO3x
} f}1R,N_fC } +u:Q+PkM ,TAzJ `II/nv0jn public void splitterStop() L:g!f
{ ]M;aVw<! bStop = true; tzeS D C } aN5 w b8@gv OB s-He } ITu6m<V kM,$0@ naT;K0T= /* . !|3a **FileAccess.java ,\BGxGNAmV *//文件访问(定位,写) $m;rOKVU package NetFox; KF[P
/cFI import java.io.*; MH>CCT ag$mc8-p[ 6(`Bl$M9 public class FileAccessI implements Serializable{ dm&vLQVS 7]~65@%R-& //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 )"IBw0] RandomAccessFile oSavedFile; pv2u.qg5z long nPos; mGmkeD' |hprk-R*OH k2xOu9ncEj public FileAccessI() throws IOException 8W|qm;J98 { |lijnfp this("",0); : _>/Yd7-& } b'N(eka 9Xg+$/ m};Qng] public FileAccessI(String sName,long nPos) throws IOException 'o#ve72z1 { D#T1~r4 oSavedFile = new RandomAccessFile(sName,"rw"); P2S$Dk_<\X this.nPos = nPos; av&4:O! oSavedFile.seek(nPos); K0i[D" } D4x~Vk%H x*A_1_A Ifm|_ public synchronized int write(byte[] b,int nStart,int nLen) 8tM40/U$ { DJv;ed%x int n = -1; 2U-F}Z try{ .I@jt?6X oSavedFile.write(b,nStart,nLen); Dwq }O n = nLen; e)[>E\u _ } j z aC catch(IOException e) V(%L}0[] { v}v! hs Q e.printStackTrace (); /\S1p3EW* } 4&Uq\,nx IQFt4{aK3 (1r.AG`g return n; Khbkv } ab 1qcQ< .cTK\ R(c:#KF#8 } d85\GEF9i 8\BCC1K `3Gjj&c /* %d5;JEgA:g **SiteInfoBean.java LeA=*+zP[ */ a$7}_kb package NetFox; ?G[<~J3-E f((pRP \(PC#H% public class SiteInfoBean { =dyApR:' tp='PG.6 +`_I! private String sSiteURL; //Site's URL f&w8o5=|I private String sFilePath; //Saved File's Path w7H.&7rF private String sFileName; //Saved File's Name ZI
q!ee private int nSplitter; //Count of Splited Downloading File kMGK8y &95iGL28Q s}]qlg public SiteInfoBean() sbZ$h
< {//nSplitter的缺省值为5 .!ThqYo //default value of nSplitter is 5 {
jnQoxN this("","","",5); *^XfEO } "x.|' LLn,pI2fL{ $'I+] ; public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) E$-u:Z<- { !$"DD[~\ sSiteURL= sURL; `.f
{V sFilePath = sPath; [TAW68f' sFileName = sName; ,O@xv this.nSplitter = nSpiltter; =_%i5]89P h 7feZ_ ]&za^%q0& } a
D* nR7 usL a1;P2ikuK public String getSSiteURL() qc}r.'p { x&6SjlDb$K return sSiteURL; (vCMff/ Y1 } B/S~Jn -9XB.)\# VtX9}<Ch~ public void setSSiteURL(String value) UXz0HRRS0 { B!|<<;Da6 sSiteURL = value; ~c>* 3* } -jc8ku3* ;}!hgyq olNgtSX public String getSFilePath() =Rl?. +uE { ), >jBYMJ return sFilePath; M+<xX) } d,fX3 @V/Lqia ?)$+W+vK public void setSFilePath(String value) lsV9-)yyl { ?dJ-g~ sFilePath = value; {*VCR } )J?Nfi% ~n:dHK` ~$1Zw&X public String getSFileName() -@49Zh2' { X<\y%2B|l return sFileName; 4\)"Ih } LRO'o{4$E Y6T1_XG I#0WN public void setSFileName(String value) W+3ZuAP\n { ,Vz
1l_7 sFileName = value; MHN?ZHC) } 74VN3m 3[kY:5- KX e/i~AS public int getNSplitter() l0Myem
v?z { 8}m bfuo1 return nSplitter; :3k&[W* } o8+ZgXct t?NB#/#%x 0GR\iw$[J public void setNSplitter(int nCount) o9dqHm { z4f\0uQ nSplitter = nCount; [#y/` } AtRu)v6r } ZCJOh8 3.q%?S}* 1eC1Cyw /* 14TA( v]T **Utility.java ^dB~#A1 */ [KA&KI^hF package NetFox; 7 jq?zS|
5Xn+cw* % AqUVt9} public class Utility { @5n!t1( Kq}/`P %G6ml, public Utility() %Z@+K_X9x { /+\m7IS Ha l,%W~e mQmn &:R } !8q+W`{ )clSW //线程睡眠 ;[%_sVIy public static void sleep(int nSecond) YfBb=rN2s { 0-H! \IB try{ _3UH"9g{ Thread.sleep(nSecond); z;:c_y!f } }q1@[
aE catch(Exception e) >C"f'!oM,j { p F\~T> e.printStackTrace (); )ndcBwQc" } /.<tC( } 0HUSN_3F %c%0pGn8- //日志 =[8EQdR public static void log(String sMsg) `Tt}:9/3 { :'aT4 System.err.println(sMsg); .Ap-<FB } 5~T`R~Uqb BKDs3?& Qmxe*@{` public static void log(int sMsg) 70,V>=aJ { Dm=t`_DL8 System.err.println(sMsg); ea3;1-b: } Ad)Po } 9] /xAsD h^klP: Q _{CMWo"l /* |cpBoU **TestMethod.java qd*3| O^ */ cjzhuH/y package NetFox; zx"'WM* O$jj& /C(lQs*l public class TestMethod { .'o<.\R8 &V5[Zj|] f}q4~NPn- public TestMethod() ,]?Xf> { ///xx/weblogic60b2_win.exe H.EgL@;mb try{ &6fNPD(| SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); m+p}Qi8i) //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); y6.}h9~ SiteFileFetch fileFetch = new SiteFileFetch(bean); K;jV"R<9 fileFetch.start(); WF0%zxg ] } CZB!vh0 catch(Exception e){e.printStackTrace ();} Qs2E>C ,4oYKJ$+h x2p}0N } E"!I[ yM$@*od &7* |rshZ public static void main(String[] args) )i8Hdtn { ;AV[bjRE\ new TestMethod(); fE"Q:K6r2 } N9LBji;nH } j-wSsjLk 点击下载更多相关资料
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