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/* Id8^6FLw **SiteFileFetch.java Hbogi1!al| */ ;)ffGg> package NetFox; [\N,ow,n import java.io.*; b
62 o import java.net.*; .<JD'%?" j^A0[:2 gE8=#%1< public class SiteFileFetch extends Thread { S-[]z* w
<zO x7$U SiteInfoBean siteInfoBean = null; //文件信息Bean ,ry2J,IT7 long[] nStartPos; //开始位置 x:8x GG9 long[] nEndPos; //结束位置 M7vc/E}]n FileSplitterFetch[] fileSplitterFetch; //子线程对象 :b+C<Bp64r long nFileLength; //文件长度 7aTo!T boolean bFirst = true; //是否第一次取文件 >W2Z]V
boolean bStop = false; //停止标志 ]>h2h ?2te File tmpFile; //文件下载的临时信息 S9X~<!] DataOutputStream output; //输出到文件的输出流 $^R[t; u?[P@_i< //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) n y6-_mA] public SiteFileFetch(SiteInfoBean bean) throws IOException *au&ODa { FY"!%)TV siteInfoBean = bean; v ?@Ys+V //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); H?8uy_Sc tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); \~ O6S`, if(tmpFile.exists ()) 2d+IROA { )W9$_<Z bFirst = false; @ -pi read_nPos(); ;zI;oY#.y } }x% ;y]S else `T $lTP { qe!`LeT# nStartPos = new long[bean.getNSplitter()]; HKO00p7 nEndPos = new long[bean.getNSplitter()]; ~X;r}l=k< } +) 2c\1 * bmdY=#7 ji{V# Y<Y5HI" }
rly3f s$xctIbm?, ) ^PY-~o[ public void run() N3E Qq~lX { MO)N0{.b //获得文件长度 7]a6dMh //分割文件 R:YX{Tq //实例FileSplitterFetch !]qwRB$5 //启动FileSplitterFetch线程 Bt|S!tEy //等待子线程返回 z<_{m4I; try{ EOhUr=5~ if(bFirst) ewB&PR { %tM]|!yw nFileLength = getFileSize(); R7cY$K{j if(nFileLength == -1) 5o\yhYS: { ZQND^a: System.err.println("File Length is not known!"); En3Q% } @TC_XU)& else if(nFileLength == -2) :av6*&+ { c_a*{L|c System.err.println("File is not access!"); Bn*D<<{T } g':mM*j& else P7d" E { 4lC:svF for(int i=0;i<nStartPos.length;i++) 3EB8ls2 { 1R9hA7y&,/ nStartPos = (long)(i*(nFileLength/nStartPos.length)); "_jczr$* } 7)G- EAF for(int i=0;i<nEndPos.length-1;i++) ~d_Z?Z { f5zxy!dhKS nEndPos = nStartPos[i+1]; H?ssV^k } 4\<[y]pv nEndPos[nEndPos.length-1] = nFileLength; 2;.7c+r0 } -fVeE<[ } N8:?Z#z nU%rSASu u9}}}UN! //启动子线程 8m1@l$ fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; f33'2PYl for(int i=0;i<nStartPos.length;i++) $6atr-Pb { 95^w" [}4Q fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), h";G vjy siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), ("o<D{A nStartPos,nEndPos,i); Y>Q9?>}Q Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); P"W$ZX fileSplitterFetch.start(); ORlz1&hW } HH+NNSRO // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), |{cdXbr siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); /ow/)\/} // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", |//cA2@. nEndPos = " + nFileLength); sl-LX)*N# // fileSplitterFetch[nPos.length-1].start(); T=:&W3 ^sd+s ~xx y.5mYQA4=[ //等待子线程结束 N!m-gymmF //int count = 0; IJO`"da //是否结束while循环 "QA CQ- boolean breakWhile = false; Fgxh?Wd9 hJ#U;GL ~\DC
) while(!bStop) ~}w(YQy=y { sIdo(`8$ write_nPos(); l*("[?>I Utility.sleep(500); N:[m,U9a breakWhile = true; -vwkvNn8 g"(
vl-Uw Y'S xehx for(int i=0;i<nStartPos.length;i++) ?mS798=f { 4JFi|oK0H if(!fileSplitterFetch.bDownOver) &M=12>ah] { Ki}PO`s breakWhile = false; }q T @. break; Hkg^ } 6G7B&"& } z,}1K! if(breakWhile) c>{X(Z=2 break; )y'`C@ijI r
vVU5zA4H e{U`^ao`F8 //count++; IB
/.i( //if(count>4) QkZT%!7 // siteStop(); o1MI&}r } b*qkox;j % ~J90a g$kK)z System.err.println("文件下载结束!"); ~el#pf~ } wKe^5|Rr catch(Exception e){e.printStackTrace ();} (\.[pj%-O } &D[dDUdHs KM< +9` YTQ|Hg6jO //获得文件长度 D; H</5#Q public long getFileSize() vTQQd@ { ^2|gQ'7< int nFileLength = -1; uCF+Mp try{ 7<x0LW URL url = new URL(siteInfoBean.getSSiteURL()); AUcq\Ys HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); |OF<=GGO+ httpConnection.setRequestProperty("User-Agent","NetFox"); ;#78`x2 7!hL(k[ Q{b Z D* int responseCode=httpConnection.getResponseCode(); +`u]LOAyP= if(responseCode>=400) r-'\<d(J$ { yfiRMN"2 processErrorCode(responseCode); ;5ugnVXu return -2; //-2 represent access is error RPPxiYU^ } I/jMe'Kp IE: x&q`3 G%;XJsFGp String sHeader; Kl{2^q> lg&"=VXx51 %;^[WT`, for(int i=1;;i++) 5*[zIKdt2 { R+P,kD? //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); %Ub"V\1 //Utility.log(in.readLine()); C"k8M\RW? sHeader=httpConnection.getHeaderFieldKey(i); )9##mUt'} if(sHeader!=null) JxiLjvIq { f|WNPFQ$x if(sHeader.equals("Content-Length")) 'SYj Ehvw { E0\ ' nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); qc|;qPj break; E,shTh%&~ } K:z|1V } x^8x z5:O else dwv xV$Nt break; #p&iH9c_ } u3Z*hs)Z% } 6vro:`R ? catch(IOException e){e.printStackTrace ();} /$\yAOA'y catch(Exception e){e.printStackTrace ();} k )Z? %<O'\&!, 7.CzS Utility.log(nFileLength); j7<`^OG ]x:>~0/L VhT4c+Zs return nFileLength; "Vho`x3 } y^Oj4Y: G'MYTq FlOKTY //保存下载信息(文件指针位置) W>K2d
private void write_nPos() zv <, { r-^Ju6w{ try{ ggVB8QN{ output = new DataOutputStream(new FileOutputStream(tmpFile)); Ag }hyIl output.writeInt(nStartPos.length); ?qAX *j for(int i=0;i<nStartPos.length;i++) ]n${j/x { Ec8Y}C,{7< // output.writeLong(nPos); cInzwdh7 output.writeLong(fileSplitterFetch.nStartPos); Bqv Oi~l output.writeLong(fileSplitterFetch.nEndPos); gmLGK1 } yrR<F5xge output.close(); RQy|W}d_ } ?CA P8 _ catch(IOException e){e.printStackTrace ();} J^hj
R%H catch(Exception e){e.printStackTrace ();} S-gL]r3G8 } ?#ndMv!$ ZL #4X*zT L;Nz\sJ //读取保存的下载信息(文件指针位置) , =IbZ private void read_nPos() ']u w,b { *ls}r5k2Y try{ } !pC}m DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); $7jJV (B int nCount = input.readInt(); (+4gq6b nStartPos = new long[nCount]; w?Nvm?_] nEndPos = new long[nCount]; qXt2m for(int i=0;i<nStartPos.length;i++) cm%QV? { t&mw@bj nStartPos = input.readLong(); Z7JI4" nEndPos = input.readLong(); +NxEx/{ } llhJ,wD input.close(); (nbqL+ } _I<eJ\ catch(IOException e){e.printStackTrace ();} [ k^6#TQcn catch(Exception e){e.printStackTrace ();} $bF.6 } Y{1IRP?S JiDX|Q<c kFHq QsaG private void processErrorCode(int nErrorCode) WUQ2[)< { kR%CSLOVy System.err.println("Error Code : " + nErrorCode); N12K*P[! } 1jh^-d5 NVS U)# )$P!7$C- //停止文件下载 r5(OH3 public void siteStop() `dMOBYV { g`y
>)N/ bStop = true; }pu2/44=W for(int i=0;i<nStartPos.length;i++) 4Yt:PN2 fileSplitterFetch.splitterStop(); F04`MY" &~6Z)} 1e'-rm
F } xh#ef=Bw } JZD27[b //负责部分文件的抓取 uDafPTF **FileSplitterFetch.java /cJ$`
pN */ Fr,>| package NetFox; NJz8ANpro$ jsf=S{^2 Z]1~9:7ap import java.io.*; YCeE?S1gk3 import java.net.*; ZJP.-` U TiCp2Rsz gA2Il8K public class FileSplitterFetch extends Thread { .7g^w+W NjdAfgA -J:](p String sURL; //File URL G-Sw`HHo long nStartPos; //File Snippet Start Position e3F)FTG& long nEndPos; //File Snippet End Position #fG!dD42 int nThreadID; //Thread's ID H[*.Jd boolean bDownOver = false; //Downing is over .m7iXd{ boolean bStop = false; //Stop identical *Y9"-C+ FileAccessI fileAccessI = null; //File Access interface bNFX+GA/ &Km?(%? c<A@Op"A public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException 7_E+y$i= { 6^mO<nB this.sURL = sURL; HMgZ&v this.nStartPos = nStart; WWrDr this.nEndPos = nEnd; !!o69 nThreadID = id; 5A7!Xd fileAccessI = new FileAccessI(sName,nStartPos);//定位 |42E'zH& } _:c8YJEG{ <hZA$.W3 y`mE sj public void run() *.Y!ZaK { @xtcjB9 while(nStartPos < nEndPos && !bStop) L
G,XhN { =Q.2:*d. OB6I8n XW l#~Sh3@L( try{ t<|=- URL url = new URL(sURL); hAfR Hd HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); )}~k7bb}Y httpConnection.setRequestProperty("User-Agent","NetFox"); zXbTpm String sProperty = "bytes="+nStartPos+"-"; vo!:uvy;2 httpConnection.setRequestProperty("RANGE",sProperty); KVtnz Utility.log(sProperty); uTbI\iq qOZc}J0 AcrbR&cvG InputStream input = httpConnection.getInputStream(); >P>.j+o/ //logResponseHead(httpConnection); cw/g1,p 9D(M>'Bh @2CYv> byte[] b = new byte[1024]; /w_Sc{ int nRead; H^K(1
while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) Rk"VFe>r { viD+~j18 nStartPos += fileAccessI.write(b,0,nRead); , *e^,|# //if(nThreadID == 1) 67 7p9{: // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); 0w8Id
. , } ,{%/$7) wjq f u / 5>KAVtYvc Utility.log("Thread " + nThreadID + " is over!"); H<}<f: bDownOver = true;
0>H<6Ja //nPos = fileAccessI.write (b,0,nRead); ItYG9a }
/A_</GYs catch(Exception e){e.printStackTrace ();} A.
U< } @`wBe#+\ } q jDWA' P6i4Dr KbMgatI/ //打印回应的头信息 X[j4V<4O public void logResponseHead(HttpURLConnection con) gBYL.^H^l { Hi,_qlc+ for(int i=1;;i++) m ~fqZK { _#f/VE String header=con.getHeaderFieldKey(i); q,aWF5m@ if(header!=null) iBN,YPo~ //responseHeaders.put(header,httpConnection.getHeaderField(header)); 9^v|~f Utility.log(header+" : "+con.getHeaderField(header)); ?Sn$AS I
else ;L(W'+ break; ?7^(' } .N_0rPO,Kw } kzJNdYtdH jtQ2vJ- |A'8 'z&q public void splitterStop() R!*UU'se { t
Z\ bStop = true; f:Nfw+/q } F mh;d*IT w,eYrxR|N UQ'D-eK } %CF(SK2w -T4?5T_ :/~`"`#1 /* Haj`mc!<D0 **FileAccess.java >bz}IcZP *//文件访问(定位,写) IJS9%m# package NetFox; .A\9|sRZ5 import java.io.*; fAUtqkB 0u'2f`p* (W=z0Lqu public class FileAccessI implements Serializable{ OjJlGEl w (mt,:hX //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 [g=yuVXNZZ RandomAccessFile oSavedFile; }4cLU.L8O long nPos; $o/?R]h J:#B,2F+^ oF]0o`U&a public FileAccessI() throws IOException E`LML? { Fd5{ pM3 this("",0); vq( @B } "4`h -Y l=
~]MSwY >W.Pg`'D public FileAccessI(String sName,long nPos) throws IOException B964#4&
9 { >I]t|RT]) oSavedFile = new RandomAccessFile(sName,"rw"); Z7k {7 this.nPos = nPos; 5y}}?6n+ oSavedFile.seek(nPos); .[= 0(NO } -M%n<,XN0 Pk~P ZN%$k-2 public synchronized int write(byte[] b,int nStart,int nLen) 'V 1QuSd { kSB)}q6a int n = -1; FK@rZP try{ j\@s pbE@ oSavedFile.write(b,nStart,nLen); iknB c-TLD n = nLen; )3h=V^rm } Q&`$:h.~ catch(IOException e) ^tc@bsUF { {r[*}Bv
e.printStackTrace (); WZ6!VE{ } JY9Hqf cU%#oEMf< uZm<:d2%) return n; D~NH 4B } dfc-#I
p? FEU$D\1y Lkqu"V } 2#T|+mKxZM r'{pTgm# kRSu6r9 /* 'PV,c|f> **SiteInfoBean.java JS({au */ *bmk(%g package NetFox; A){kitx-i) I0m/ @iC!Q>D public class SiteInfoBean { J>!p^|S{ )bi*y`UM] @hl5^d"l private String sSiteURL; //Site's URL VI" ,E} private String sFilePath; //Saved File's Path =2J+}ac private String sFileName; //Saved File's Name ,0lRs private int nSplitter; //Count of Splited Downloading File sGMC$%e} "o;l8$)VL X*$ 7g; public SiteInfoBean() 2$qeNy {//nSplitter的缺省值为5 pOIFO=k //default value of nSplitter is 5 +;FF0_ this("","","",5); "Q2[A]4E } h^x7[qe <adu^5BI .?!{. D public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) gTO% { C(e!cOG sSiteURL= sURL; ]$0{PBndW sFilePath = sPath; ;)"r^M)): sFileName = sName; MSRIG- this.nSplitter = nSpiltter; 5A~w_p*} 3w!oJB wpx,~`& } )z7.S"U P63z8^y if#$wm% public String getSSiteURL() g>OGh o { k?|VFh1 return sSiteURL; ScZ$&n } N;r,B rd%3eR?V d 'x;]#S public void setSSiteURL(String value) X=${`n%LG { c7wza/r> sSiteURL = value; `1M_rG1/+ } uZ<Bfrc ~g1@-)zYxK Qbt
fKn95 public String getSFilePath() |])%yRAGQ { ,1^)JshZ~ return sFilePath; zs[t<`2 } ^C<dr}8 h>bmHQ Y<a/(` public void setSFilePath(String value) ^6J*yV% { =jg!@H=_i sFilePath = value; Y*wbFL6` } 9Ki86 .}Bb
:*@ -cY/M~ public String getSFileName() 0A5xG& { {D`F$=Dlw return sFileName; 'DntZK } 0vQkm< "]zq<LmX D=9x/ ) *G public void setSFileName(String value) ,!sAr;Rk` { 2HQHC] sFileName = value; [>C^ 0\Z~ } ag|d_; mI0|lp 1$ ks(PH6:]< public int getNSplitter() pSV
8! { z81I2?v[Jr return nSplitter; BtU,1`El5 } r~t&;yRv 4XX21<yn M7jDV|Go public void setNSplitter(int nCount) R8":1 #& { c!w4N5aM nSplitter = nCount; :*}tkr4&eh } ~a/yLI"'g } &,NHk9.aq Zh3]bg5 3bE^[V8/ /* W=F?+KgL **Utility.java [0)iY%^ */ eYsO%y\I package NetFox; W{Nhh3 QbOmJQ QD\S E public class Utility { RsTpjY*Xb 3 5|5|ma )I!l:!Ij*D public Utility() 8MW|CM4Q { \% ^<Ll g*Cs/w 2Ybz`O!
} ,:=E+sS
"#[Y[t\Ia //线程睡眠 x`C; public static void sleep(int nSecond) k`\DC\0RG { CgEeO,N]j try{ 7p u*/W~ Thread.sleep(nSecond); C_'Ug } {&K#~[) catch(Exception e) [Hn+r & { (CuaBHR
e.printStackTrace (); ^IQC:21 } 3=;iC6
` } W-Hw%bwN/q VZ_4B *D //日志 J5|Dduv
public static void log(String sMsg) o^DiIoor { Zu~ #d)l3N System.err.println(sMsg); U
R@'J@V#: } ''f ^f3F~XhY3 sVh!5fby& public static void log(int sMsg) kFuaLEJi { gI\J sN System.err.println(sMsg); oleRQ= } LX*T<|c`' } `"-)ObOj} OmKT}D~ 4 Q6}`% /* K
7YpGGd5 **TestMethod.java b?HW6Kfc */ if^\Gs$ package NetFox; jL`S6E?7 r,yhc = |? r,W~9` public class TestMethod {
].:S!QO (M5=8g%>d >@TZYdl public TestMethod() !>t|vgW { ///xx/weblogic60b2_win.exe rJ!xzge;G try{ =A=er1~% SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); .F
3v) //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); 2v%~KV SiteFileFetch fileFetch = new SiteFileFetch(bean); GHYgSS fileFetch.start(); Kr]F+erJe } LvW9kL+WiQ catch(Exception e){e.printStackTrace ();} (Ptv#LSUX S=M$g#X`5 &x;v& } <R]?8L0{h B8B^@
^>k [T. public static void main(String[] args) wU+ofj;
+I { m_(+-G new TestMethod(); W W== } =xa`)#4( } :X2B+}6_& 点击下载更多相关资料
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