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/* I%Z&i-33y **SiteFileFetch.java V
ALYA=w/ */ J/Li{xp)Lg package NetFox; ^M"g5+q import java.io.*; RP$A"<goP import java.net.*; cW\ 7yZh "+AD+D J2rH<Fd[up public class SiteFileFetch extends Thread { !Fi)-o {Bx\Z0+'& hSmM OS{ SiteInfoBean siteInfoBean = null; //文件信息Bean A6VkVJZx long[] nStartPos; //开始位置 >e%Po,Fg$ long[] nEndPos; //结束位置 ^.Q),{%Xo FileSplitterFetch[] fileSplitterFetch; //子线程对象 Aj_}B. long nFileLength; //文件长度 dhbJ1/z^ boolean bFirst = true; //是否第一次取文件 ux=@"!PJ boolean bStop = false; //停止标志 S{ !hpq~o File tmpFile; //文件下载的临时信息 :gXj($ DataOutputStream output; //输出到文件的输出流 R.@GLx_zpQ hS
Sq=(S //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) w]}vm- public SiteFileFetch(SiteInfoBean bean) throws IOException
.1;?#t]ZV { 9z#IdY$a siteInfoBean = bean; 0Sk{P>A //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); Sl1N V tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); _>.%X45xi if(tmpFile.exists ()) cQjJ9o7 { 23PSv8;EM bFirst = false; _"n4SXhq read_nPos(); |Cm}%sgR\0 } ocvBKsfhE` else lc^%:#@ { +x`tvo nStartPos = new long[bean.getNSplitter()]; {|cA[#j# nEndPos = new long[bean.getNSplitter()]; Tn|reXc0e } v|e>zm< o?>)CAo N{'k
]& zI(Pti } u4Sa4o T!n<ya! S}<(9@]z public void run() IKt9=Tx { D~<GVp5T //获得文件长度 G} p~VLf //分割文件 Pdv&X*KA //实例FileSplitterFetch &8N\
6K= //启动FileSplitterFetch线程 U!h!z`RU54 //等待子线程返回 /Wa+mp try{ V:lDR20*\ if(bFirst) >v(Xc/oI { OA8pao~H nFileLength = getFileSize(); |laqy`D if(nFileLength == -1) oq|K:<l { -Bc.<pFqp System.err.println("File Length is not known!"); *oF{ R^ } V1+IqOXAIp else if(nFileLength == -2) L:31toGK { _T1e##Sq, System.err.println("File is not access!"); '{|87kI } Cs$g]&a else $]_=B Jyu {
@`T6\ 1 for(int i=0;i<nStartPos.length;i++) GxBj N7" { ji1A>jepF nStartPos = (long)(i*(nFileLength/nStartPos.length)); 7M4iBk4I } U|>Js!$ for(int i=0;i<nEndPos.length-1;i++) a P`;Nr= { ka (xU#; nEndPos = nStartPos[i+1]; 3cnsJV] } Xd4~N: nEndPos[nEndPos.length-1] = nFileLength; D=8=wT2< } @8 pRIS"V } bY`k`3v E yNCky ,HkJ.6KF //启动子线程 |i|O9^*% fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; </fzBaTo for(int i=0;i<nStartPos.length;i++) V3UEuA { ]$7|1-&Y fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), =[P || siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), f}fM%0/5 nStartPos,nEndPos,i); {5,CW Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); 5EU3BVu&u fileSplitterFetch.start(); B%,0zb+-L } AojX)_"z // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(),
;HW@ZI siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); A;%fAI2Vr // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", 'RPe5 vB nEndPos = " + nFileLength); J[^-k!9M // fileSplitterFetch[nPos.length-1].start(); vnKUD| !$O +M#
5!wa\)wY //等待子线程结束 m$U2|5un& //int count = 0; y+c+ / L8 //是否结束while循环 F:\CDM=lS boolean breakWhile = false; KjhOz%Yt[o S -im
o T3bBc while(!bStop) ,i'>+Ix< { j_k!9"bt write_nPos(); 5YRa2#d Utility.sleep(500); AH ;h#dT breakWhile = true; NpSS/rd $ [z/OY&kF EayZ*e] for(int i=0;i<nStartPos.length;i++) wz'D4B { -?j'<g0 if(!fileSplitterFetch.bDownOver) tFG&~tNc { >1W)J3 breakWhile = false; R+P1 +5 break; `}1 8A.K } ;0 ,-ywK } emTqbO if(breakWhile) /CH*5w)1
break; 6z~6o0s~ BeBa4s *S7<QyVh //count++; X'O3)Yg //if(count>4) Wq]^1g_ // siteStop(); M4`qi3I } Fvg>>HVu ,XR1N$LN8_ 3d[fP#NY7 System.err.println("文件下载结束!"); gd2cwnP } li(g?|AD catch(Exception e){e.printStackTrace ();} iOw'NxmY } w?Y;pc}1B @2V#bK ^`ny]3JA //获得文件长度 K;Fy&p^d public long getFileSize() $)6y:t" { I t",WFE. int nFileLength = -1; af.yC[ try{ 67^?v)| URL url = new URL(siteInfoBean.getSSiteURL()); N_wB HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); NU O9, httpConnection.setRequestProperty("User-Agent","NetFox"); /alJN`g T-0fVTeN ~~z}yCl int responseCode=httpConnection.getResponseCode(); Re-4y5f if(responseCode>=400) "H#2 { 'V/+v#V+> processErrorCode(responseCode); eX>x
+]l6 return -2; //-2 represent access is error U8 '}( } TF2'-"2Y h<JV6h :8 C`Zz\DNG@ String sHeader; ><^
, @w?hXK= ogtl
UCUD for(int i=1;;i++) c3lU { t
7 dcaNBZ //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); ,Tjc\;~% //Utility.log(in.readLine()); _ ZMoPEW sHeader=httpConnection.getHeaderFieldKey(i); Q3T@=z2j% if(sHeader!=null) e-Mei7{% { ^-Bx zOp if(sHeader.equals("Content-Length")) C8ek{o)%W { DgW*Br8< nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); Y'H|Tk^` break; r1ao=N } 2M@,g8O+B= } GUSEbIz): else )H8Rfn? break; Dn~c } yH/m@# } _TEjB:9eY catch(IOException e){e.printStackTrace ();} R.^
Y'TLyc catch(Exception e){e.printStackTrace ();} dg-nv]7 b@`h]]~: Bq@_/*'*Y Utility.log(nFileLength); bi~1d"j }hRw{#*8 ozB2L\D7 return nFileLength; [_PZdIN } O%}?DiSl ZMEU4?F lub_2Cb|j //保存下载信息(文件指针位置) Q #IlUo private void write_nPos() x4v@o?zW { VUmf;~ try{ e*)*__$O output = new DataOutputStream(new FileOutputStream(tmpFile)); -aPRLHR output.writeInt(nStartPos.length); |kGj}v3 for(int i=0;i<nStartPos.length;i++) z[|2od { iC2``[m" // output.writeLong(nPos); -?z# output.writeLong(fileSplitterFetch.nStartPos); )xm[m vt output.writeLong(fileSplitterFetch.nEndPos); {#y~ Qk;T } x18(}4 output.close(); XtCG.3(LY } _xY
dnTEl catch(IOException e){e.printStackTrace ();} Vq$8!#~w catch(Exception e){e.printStackTrace ();} mSeCXCrZlI } l]R=I2t +adwEYRrr FNlS)Bs //读取保存的下载信息(文件指针位置) '-X[T} private void read_nPos() .7BJq?K. { q<[m(]: try{ _59f.FsVR DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); #K&XY6cTj int nCount = input.readInt(); i/|}#yw8A nStartPos = new long[nCount]; !{q_Q ! nEndPos = new long[nCount]; z_f^L %J0 for(int i=0;i<nStartPos.length;i++) g^I?u$&E { hU'h78bt( nStartPos = input.readLong(); \?tE,\Ln nEndPos = input.readLong(); uo9FLm }
u4x>gRz) input.close(); Q%r KKOX8 } Y]VLouzl catch(IOException e){e.printStackTrace ();} F
~SA3M: catch(Exception e){e.printStackTrace ();} L%;fYi;n } QZ&
4W WA((>Daf] +R"Y~
m{F private void processErrorCode(int nErrorCode) B_mT[)ut { *[Im]. System.err.println("Error Code : " + nErrorCode); xciwKIpS } L8,/ 0@yw#.j G,!{Q''w //停止文件下载 G,e!!J public void siteStop() (1e,9!? { ULH<FDot bStop = true; @)XR for(int i=0;i<nStartPos.length;i++) Tm\a%Z`U> fileSplitterFetch.splitterStop(); >=1A a,_tc QpCTHpZ (}m2} } U0=: `G2l } qr4.s$VGs* //负责部分文件的抓取
YWAH( **FileSplitterFetch.java # Rhtaq9 */ mor[AJ package NetFox; p(>D5uN_}5 1z3>nou2{ fG zx;<0P! import java.io.*; U4=m>Ty import java.net.*; qC6@ J4%"38l #f@}$@ public class FileSplitterFetch extends Thread { 1>=%TIO) m*|G2 hx! :F"# String sURL; //File URL .cm9&&"Z long nStartPos; //File Snippet Start Position [}I|tb>Pg long nEndPos; //File Snippet End Position {4 {X`$ int nThreadID; //Thread's ID vM?,#:5 boolean bDownOver = false; //Downing is over <ivq}(%72 boolean bStop = false; //Stop identical v]\T&w%9 FileAccessI fileAccessI = null; //File Access interface ioBYxbY` ^+w1:C 5 v:"Y public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException l}@C'Np { !Qq~lAJO; this.sURL = sURL; Lb#PiTJI this.nStartPos = nStart; -HF1c this.nEndPos = nEnd; `-MCI)Fq_R nThreadID = id; &o]fBdn fileAccessI = new FileAccessI(sName,nStartPos);//定位 cJ\1ndBH } vRb7=fXf T_[5 ZYy [Lcy &+ public void run()
VIaj])m { (&-I-#i while(nStartPos < nEndPos && !bStop) eus@;l* { K5 EJ#1ov t>P[Yld" G<P/COI#M5 try{ [0D.+("EW URL url = new URL(sURL); q'9; HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); d ATAH}r& httpConnection.setRequestProperty("User-Agent","NetFox"); [HhaBy9 String sProperty = "bytes="+nStartPos+"-"; CF6qEG6 httpConnection.setRequestProperty("RANGE",sProperty); #y'p4Xf Utility.log(sProperty); 7^;-[?l
$9h^tP'CV Pv|sPIIB7 InputStream input = httpConnection.getInputStream(); ymn@1BA8J //logResponseHead(httpConnection); _hgGF9 ydMhb367| f\FqZ?w byte[] b = new byte[1024]; 0v#p4@Z int nRead; /IlO while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) _FU}IfG>t { 3:<[;yo nStartPos += fileAccessI.write(b,0,nRead); F-XMy>9 //if(nThreadID == 1) XZ2 ji_D // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); w\M"9T } fZ(k"*\MZ XP[~ :+ r?9".H Utility.log("Thread " + nThreadID + " is over!"); 3e>U(ES bDownOver = true; e~SRGyIww //nPos = fileAccessI.write (b,0,nRead); +i[@+`
} v|dt[>G catch(Exception e){e.printStackTrace ();} b'I@TLE') } 3lbGG42: } <E:_9#Z0sc R[kF(C& &UVqFo //打印回应的头信息 qT01@Bku public void logResponseHead(HttpURLConnection con) dGUiMix{N { A@;{#.O for(int i=1;;i++) |n;5D,r0C { C)~%(< D String header=con.getHeaderFieldKey(i); OnyAM{$g if(header!=null) T+PERz( //responseHeaders.put(header,httpConnection.getHeaderField(header)); `4e| I.`^r Utility.log(header+" : "+con.getHeaderField(header)); Y5y7ONcn else ;X:Bh8tEV break; 8K@e8p( y } oN)I3wO$ } RRro.r, d6ifJ E
B!
,t public void splitterStop() RU~Pa+H { TEbIU8{Y bStop = true; i6S["\h> } YV'B*arIA Esm=sPW %0({MU } l3y}nh+ 8 P~V ^Efz{ J\N&u# /* Od~e*gA8 **FileAccess.java *q;83\ *//文件访问(定位,写) T+S\'f\ package NetFox; RB6TM import java.io.*; nm)/BK JEK_W<BD ;&!QN#_ public class FileAccessI implements Serializable{ \9~Q+~@{G e(FT4KD~ //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 >p`i6_P0P/ RandomAccessFile oSavedFile; \=$G94% long nPos; aiZZz1C Jx Kd wKoar public FileAccessI() throws IOException 6B Hdc { 6W~JM^F this("",0); ztAC3,r] } BqpJvRJd L=.@hs 6G(K8Q{> public FileAccessI(String sName,long nPos) throws IOException .yHK { FbH@qHSH oSavedFile = new RandomAccessFile(sName,"rw"); [q/eRIS_ this.nPos = nPos; Q(R-8" oSavedFile.seek(nPos); ?X\uzu } n]nJ$u1u )TBm?VMe =`2jnvx public synchronized int write(byte[] b,int nStart,int nLen) Fu% n8 { >"z`))9 int n = -1; FE:}D;$ try{ ^W`RBrJay oSavedFile.write(b,nStart,nLen); x_ <,GE@ n = nLen; 3JD"* <zs } 9yu#G7 catch(IOException e) 5g;mc.Cvt { I0;gTpt9 e.printStackTrace (); zm_8{Rta} } ZkdSgc') >.H}(! ^)'D
eP/ return n; y 5?kv-"c } {DE4PE` X_)I"` ) r"7" i } W}|k!_/ Z`Jt6QgW BAG#YZB /* nITkgN:s **SiteInfoBean.java G7KOJZb+D */ %|ioNXMu package NetFox; UMMGT6s,E8 IR&b2FTcU n\$.6
_@x public class SiteInfoBean { L+mHeS l #KuBEHr :bCswgd[ private String sSiteURL; //Site's URL wzcv[C-x private String sFilePath; //Saved File's Path &V%faa1 private String sFileName; //Saved File's Name sp_19u private int nSplitter; //Count of Splited Downloading File 2_Zn?#G8dl z~i>GN_ +(`.pa z@ public SiteInfoBean() AmUH]+5KT {//nSplitter的缺省值为5 MM&qLAa"f //default value of nSplitter is 5 K_;?Sr= this("","","",5); [<}W S}
. } zFY$^Oz"_ +x?8\
qWXw*d1] public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) ^`RMf5i1m { '#yIcV$ sSiteURL= sURL; 2+K-I sFilePath = sPath; D+w? sFileName = sName; ty@D3l this.nSplitter = nSpiltter; {@'#|]4y. R <&U]%FD 0Ca/[_ } h?fp( @udc/J$ =(bTS n public String getSSiteURL() \_)mWK,h { p77=~s return sSiteURL; \ >#y*W< } Z4{N|h? 2ppJ;P{k *8/cd0 public void setSSiteURL(String value) l=a<=i { hn$jI5*` sSiteURL = value; YWDd[\4 } II\}84U2
. ?9T,sX: R[#B|$ public String getSFilePath() R$"> { $_|jI
^ return sFilePath; n8q%>.i7 } Y+EwBg)co aCyn9Y$= D+h`Z]"| public void setSFilePath(String value) R0nUS<b0 { ,0?3k sFilePath = value; qg*xdefQ% } xj5MKX{CJT l\u5RMS(' 3'7X[{uBr public String getSFileName() n0uL^{B { awLSY:JI return sFileName; GwG(?_I" } MEtKFC|p ]XWtw21I1 D/z*F8'c public void setSFileName(String value) &}0#(Fa` { )>pIAYCVP sFileName = value; C2L=i3R } JycC\s+%E DRRy5+,I V|4k=_- public int getNSplitter() .G/RQn]x} { |KSoS#Y return nSplitter; oCKn } WVx^}_FD0 &
5'cN /vqsp0e"H public void setNSplitter(int nCount) 3B4C@ { { xfqU
atC nSplitter = nCount; zB6&),[,v } 9"dZ4{\! } //#]CsFiP OV-#8RXJ K48QkZ_gY /* h3p~\%^ **Utility.java 8>:u%+C1c */ W)`H(J package NetFox; jVSU]LU E h~#.s*0.F Hc\oR(L public class Utility { (V`ddP- ~b9fk)z! .zJZ*\2ob public Utility() WwLV^m] { sw,p6T[ 9n3. Ar djDE0-QxcR } g7K<"Z {M Jx8DVjy //线程睡眠 UFj/Y; public static void sleep(int nSecond) Rts}y:44 { UJ&gm_M+kL try{ %vU*4mH Thread.sleep(nSecond); x'
3kHw } %;O# y3, catch(Exception e) okBaQH2lUl { "':SWKuMx e.printStackTrace (); Y_nlIcu } / KKA/ } z|zd=3c p49T3V //日志 .1[pO_ public static void log(String sMsg) I!~3xZ { QaAMiCZFR System.err.println(sMsg); ?WrL<?r)}U } inyS 4tb ?MJ5GVeH w)Y}hlcq public static void log(int sMsg) 1<wolTf { L$; gf_L System.err.println(sMsg); d)v!U+-|' } WZ
,t~TN } >fgV!o4 w%kaM= %&4\'lE /* Xgo`XsA **TestMethod.java PjU.4aZ */ *G,r:Bnb package NetFox; o%v,6yv `Ro>?H z9^_5la# public class TestMethod { 2Zi&=Zj" [Mlmn$it 4,ewp coC% public TestMethod() s;:quM { ///xx/weblogic60b2_win.exe 4?~Ei[KgQn try{ d6"B_,*b SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); E>qe hs,g //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); cONfHl{ SiteFileFetch fileFetch = new SiteFileFetch(bean); `aaT
#r fileFetch.start(); .%mjE' } i-&"1D[& catch(Exception e){e.printStackTrace ();} *q(HW |r53>,oR<: 6
ZVD<C :\ } |(R[5q ZRCUM"R_ f8L3+u public static void main(String[] args) zuBfkW95+ { Q37zBC0 new TestMethod(); `O}bPwa{> } Z/I`XPmk } ^s?i&K,! 点击下载更多相关资料
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