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/* @+,pN6}g **SiteFileFetch.java 5x2Ay=s */ ~q +[<xR\ package NetFox; :7N3N import java.io.*; 8
(jUe import java.net.*; 4B+9z^oQ CDy^UQb $WQq?1.9 public class SiteFileFetch extends Thread { TB6m0qX( >"3>s% #Sg\q8(O SiteInfoBean siteInfoBean = null; //文件信息Bean L?&'xzt B long[] nStartPos; //开始位置
Y]aW)u long[] nEndPos; //结束位置 `:{B(+6 FileSplitterFetch[] fileSplitterFetch; //子线程对象 p^m5`{1]x long nFileLength; //文件长度 0Sl]!PZR1 boolean bFirst = true; //是否第一次取文件 "](6lB1Oe boolean bStop = false; //停止标志 J<n+\F-s File tmpFile; //文件下载的临时信息 ;+ "f DataOutputStream output; //输出到文件的输出流 z+2V4s = wgeNs9L //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) pj|pcv^ public SiteFileFetch(SiteInfoBean bean) throws IOException Q'B6^%:<~ { tS# `.F~y siteInfoBean = bean; 5 +9Ze9 //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); :bU(S<%M tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); Ac k}QzXO if(tmpFile.exists ()) :HViX:]H { +~Cy$MCX bFirst = false; Fr?z" read_nPos(); c2SC|s] } ^W83ByP else zRl~^~sY { DLPUqKL] nStartPos = new long[bean.getNSplitter()]; +';>=hha nEndPos = new long[bean.getNSplitter()]; E|"=.
T } {43yb_B( i?;r7> g8;D/ wz8PtfZ } }$su4A@0 y k161\ )(Iy<Y?# public void run() Tm]nEl)_ { ,0$)yZ3*3, //获得文件长度 L7Dh(y=;7 //分割文件 .?C%1a&_l //实例FileSplitterFetch #>;FUZuJr //启动FileSplitterFetch线程 _K2?YY(#> //等待子线程返回 "T/>d%O1b try{ lw%?z/HDf if(bFirst) 4NVV5_K a { dmrps+L nFileLength = getFileSize(); `A%^UCd if(nFileLength == -1) Z*{]
, {
ye6H*K System.err.println("File Length is not known!"); YL^=t^!4 } 6w3R'\9 else if(nFileLength == -2) pz^<\ { XP[uF ;w System.err.println("File is not access!"); K5Wg"^AHY/ } 1tzV8(7 else u }hF8eD { }H:F< z* for(int i=0;i<nStartPos.length;i++) +WJ(QZEhD { H Yr}wG nStartPos = (long)(i*(nFileLength/nStartPos.length)); &Y P#M| } USJ-e for(int i=0;i<nEndPos.length-1;i++) DbX{#4lx { lkIn%=Z nEndPos = nStartPos[i+1]; z5\;OLJS, } -php6$| nEndPos[nEndPos.length-1] = nFileLength; Ths_CKwgWY } D,l,`jv* } %9C@ Xl B=L&bx E&$_`m; //启动子线程 v'2[[u{7* fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; 4\t1mocCSN for(int i=0;i<nStartPos.length;i++) FaTa(3$% { =%)+%[wv fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), G>qZxy`c siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), ".*x!l0y7 nStartPos,nEndPos,i); co 4h*?q Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); 59uwB('|lH fileSplitterFetch.start(); Y>."3*^ } :S@1 // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), w^k;D,h siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); }]1BO // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", 8cx=#Me nEndPos = " + nFileLength); 89}Y5#W // fileSplitterFetch[nPos.length-1].start();
gE/Tj$ ',7??Q7j&v ?VU(Pq*` //等待子线程结束 oj,lz? //int count = 0; u#7+U\ //是否结束while循环 Q~D`cc|] boolean breakWhile = false; vY|^/[x#B z(uZF3 MjfFf} @ while(!bStop) \/7i-B]G7 { oz'\q0 write_nPos(); Ey{%XR+*; Utility.sleep(500); FxG7Pk+= breakWhile = true; jdeV|H} u stl 1QO(h c47")2/yO for(int i=0;i<nStartPos.length;i++) `pZs T
^G[ { %wV>0gQTf if(!fileSplitterFetch.bDownOver) }H4=HDO { G}@#u9 breakWhile = false; j Ib break; DH DZ_t: } x Ha=3n } !%<^K.wG if(breakWhile) kU5.iK' break; EY`H}S!xy g_*T?;!.U 8?t"C_>*e //count++; /NT[ETMk+ //if(count>4) XALI<ZY // siteStop(); *MNHT`Y^o } a>4uiFiv ( fD
;g9 'J*<iA*W System.err.println("文件下载结束!"); BIaDY<j90 } h.rD}N\L catch(Exception e){e.printStackTrace ();} ~sQjl] } ?zJpD8e /5AW?2) C`rLj5E% //获得文件长度 e)nimq
{6 public long getFileSize() *x~xWg9^ { 1RLY $M int nFileLength = -1; WlB'YL-`g try{ (LvS
:?T} URL url = new URL(siteInfoBean.getSSiteURL()); $ZPX]2D4B# HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); 2s*#u<I httpConnection.setRequestProperty("User-Agent","NetFox"); ~pk(L[G HWns.[ V=I"-k}RL int responseCode=httpConnection.getResponseCode(); HC {XX>F^ if(responseCode>=400) +^aFs S { $VG*q processErrorCode(responseCode); B(k=oXDF return -2; //-2 represent access is error wmNHT _ } Yw3oJf& wo2@hav `i,_aFB| String sHeader; $FH18 zxb/ i[C~5}% for(int i=1;;i++) 'PZ|:9FX! { 6q<YJ., //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); yAT^VRbv //Utility.log(in.readLine()); {s?M*_{| sHeader=httpConnection.getHeaderFieldKey(i); 14eW4~Mr if(sHeader!=null) os3 8u!3- { CD j~;$[B if(sHeader.equals("Content-Length")) )'4P.>!!aQ { rsn.4P= nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); (w( break; %U7.7dSOI; } -b&{+= ^c } v7 else }/dRU${! break; ubsSa}$q } #BVtL :x@ } I:&/`K4,x, catch(IOException e){e.printStackTrace ();} snM Z0W catch(Exception e){e.printStackTrace ();} aIy*pmpD= @K223?c8l [$(%dV6O Utility.log(nFileLength); h-a!q7]l rj]F87" Z0!5d< return nFileLength; L(S'6z~_9 } z2gk[zY& Zv]x'3J#Y <>xJn{f0c //保存下载信息(文件指针位置) -Lu)'+ private void write_nPos() %m,6}yt { ha@L94Lq try{ @tohNO> output = new DataOutputStream(new FileOutputStream(tmpFile)); "|Fy+'5} output.writeInt(nStartPos.length); 0Q,g7K<d for(int i=0;i<nStartPos.length;i++) }uHrto3M { iF5'ygR-Z // output.writeLong(nPos); c:S] R" output.writeLong(fileSplitterFetch.nStartPos); W+wA_s2&D output.writeLong(fileSplitterFetch.nEndPos); zQ?!f#f } k-V,~c output.close(); ~9^)wCM+ } <P ,~eX(r catch(IOException e){e.printStackTrace ();} @[<nQZw: catch(Exception e){e.printStackTrace ();} s..lK
"b } [u@Jc, Z 2}ah Ft=zzoVKg //读取保存的下载信息(文件指针位置) 'crlA~/ private void read_nPos() c5q9LQ/ { "]'?a$\ky: try{ yw[ # DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); 0C<[9Dl.G8 int nCount = input.readInt(); >FjR9B nStartPos = new long[nCount]; 7qO a
;^T nEndPos = new long[nCount]; exh/CK4; for(int i=0;i<nStartPos.length;i++) |Z\R*b" { X)SDG#&+bF nStartPos = input.readLong(); 3P~o"a> nEndPos = input.readLong();
j1?j6s } (@X~VACT input.close(); Wc3kO'J } fy@avo9 catch(IOException e){e.printStackTrace ();} H>Q%"| catch(Exception e){e.printStackTrace ();} &*G<a3Q } j.~!dh$mg ]$ afC!Z G CRz<)1 private void processErrorCode(int nErrorCode) -U~ { 2Y}?P+:%> System.err.println("Error Code : " + nErrorCode); h'J|K^na } !f>d_RG rrg96WD $p!yhn7 //停止文件下载 xX3'bsN public void siteStop() I{JU-Jk| { dpQG[vXe bStop = true; bn
6WjJ~Z+ for(int i=0;i<nStartPos.length;i++) J{ [n?/A{ fileSplitterFetch.splitterStop(); DU%w1+u 1}hIW":3Sr 4v
p } ~/NKw: } A,su;Qh //负责部分文件的抓取 i'd2[A.7I **FileSplitterFetch.java ,h|q i[7 */ f~E*Zz`; package NetFox; Vc^HVyAx@n $VAx:Y| jR=s#Xz import java.io.*; !$2Z-! import java.net.*; $'W}aER fA'qd.{f^ ly% F."v public class FileSplitterFetch extends Thread { JvYPC !8 &=y T5urZq*R String sURL; //File URL 86@c't@ long nStartPos; //File Snippet Start Position 3mPjpm long nEndPos; //File Snippet End Position ) 9, int nThreadID; //Thread's ID ys_`e boolean bDownOver = false; //Downing is over B1]bRxwn? boolean bStop = false; //Stop identical FZreP.2)! FileAccessI fileAccessI = null; //File Access interface vVGDDDz/ _%'},Xd.z Cs2;z:O] public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException ?!qY,9lhH { Uax+dl this.sURL = sURL; fEB7j-t this.nStartPos = nStart; (E,T#uc{ this.nEndPos = nEnd; Vcd.mE(t% nThreadID = id; $/Aj1j`"9+ fileAccessI = new FileAccessI(sName,nStartPos);//定位 hF2IW{=! } dEBcfya
2VW}9O .CP&bJP% public void run() s
{^yj { Zmbfq8K while(nStartPos < nEndPos && !bStop) dr4Z5mw"E { I ZQHu h No2b"G@ t1E[uu ,V8 try{ 6c0>gUQx- URL url = new URL(sURL); CJ}5T]WZ HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); @FdSFQ/9 httpConnection.setRequestProperty("User-Agent","NetFox"); #plY\0E@ String sProperty = "bytes="+nStartPos+"-"; 4Llo`K4 httpConnection.setRequestProperty("RANGE",sProperty); L(GjZAP Utility.log(sProperty); <dyewy*.L =4d (b ; R_=6GZH$G InputStream input = httpConnection.getInputStream(); zB yqD$ //logResponseHead(httpConnection); -i-? .: Z{'i F @F(mi1QO byte[] b = new byte[1024]; X.`~>`8 int nRead; !3T&4t while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) x@8a'' { KZ~*Nz+H2 nStartPos += fileAccessI.write(b,0,nRead); R$zH] //if(nThreadID == 1) f6$b
s+oP // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); q -8t'7 } 3Hf0MAt iR"N13 ;c$ J=h] Utility.log("Thread " + nThreadID + " is over!"); G:g69=x y bDownOver = true; O|_h_I-2 //nPos = fileAccessI.write (b,0,nRead); C]Q8:6b } QeF3qXI catch(Exception e){e.printStackTrace ();} FVhU^ } .F+@B\A< } DBP9{ x$ 8QMPY[{ !ct4;.2
D //打印回应的头信息 I-OJVZ( V public void logResponseHead(HttpURLConnection con) a22XDes= { q+,Q<2J for(int i=1;;i++) Jmx Ko+- { ws4cF
N9P? String header=con.getHeaderFieldKey(i); f 2l{^E#h if(header!=null) W456!OHa //responseHeaders.put(header,httpConnection.getHeaderField(header)); [$[:"N_ Utility.log(header+" : "+con.getHeaderField(header)); *hcYGLx
r else cu+FM break; [z7bixN } K_&4D' } QY= = GfHt #:SNHM^>< 4`,j =3 public void splitterStop() Dc)dE2 { s.8{5jVG bStop = true; :6%Z]tt } B7imV@< s&j-\bOic9 =hl }.p } v$^Z6>vVI gCyW Vp {T].]7Z /*
D= 7c( **FileAccess.java >t7x>_~
*//文件访问(定位,写) $tl\UH7%2 package NetFox; '(/7[tJ import java.io.*; yr,=.?C- {s;U~!3aY Jec'`,Y public class FileAccessI implements Serializable{ H=
X|h) p)+k=b //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 ZRYEqSm RandomAccessFile oSavedFile; n'emNRa long nPos; 0V?F'<qy 8g7<KKw -44l^}_u public FileAccessI() throws IOException =JmT:enV { {p,]oOq\ this("",0); NF?
vg/{ } CD8}I85K mx=BD' vhhC>
7 public FileAccessI(String sName,long nPos) throws IOException U,LTVYrO { %Rsp;1Z oSavedFile = new RandomAccessFile(sName,"rw"); Sf8{h|71 this.nPos = nPos; b".L_Ma1* oSavedFile.seek(nPos); }1r m } Ps<d('= B/n[m@O ?R$&Xe!5 public synchronized int write(byte[] b,int nStart,int nLen) p'om- { +zs4a96[ int n = -1; 5scEc,JCi try{ =Qn ;_+Ct oSavedFile.write(b,nStart,nLen); $.bBFWk n = nLen; 9H%X2#:fH } (P`3 @H catch(IOException e) F;>!&[h}G { 'PP#^aI, e.printStackTrace (); ^4o;$u4R } R=KQ vI@%Fg+D wiBVuj# return n; Ox@P6|m } *2GEnAZb7n J4\ qEO h5K$mA5 } y.q(vzg\_ x+]\1p s8h-,@p /* )K2HK&t: **SiteInfoBean.java &
j+oJasI */ M8TSt\ package NetFox; -neKuj
95V@X
^Ee Zcc9e03 public class SiteInfoBean { `Ry]y"K LupkrxV ]EpWSs!"g private String sSiteURL; //Site's URL x|5k<CiA private String sFilePath; //Saved File's Path b4pm_Um private String sFileName; //Saved File's Name =ha{Ziryo private int nSplitter; //Count of Splited Downloading File &:7ZQ1 3=L.uXVb Ft!],n-n* public SiteInfoBean() RZCq {|L
{//nSplitter的缺省值为5 71{p+3Z& //default value of nSplitter is 5 k|!EDze43? this("","","",5); nt@aYXK4| } T|TO }_x +="e]Yh; |u ;v27 public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) qQH]`#P { @qHNE,K sSiteURL= sURL; 6!(@@^7{* sFilePath = sPath; Q0ON9gqqv sFileName = sName; \0gM o& this.nSplitter = nSpiltter; (zFi$ k Zq!& &EnuE0BD } ^) s2$A:L NW&b&o \(vY%DL1: public String getSSiteURL() ]S5JUAGkE* { y?q*WUh
return sSiteURL; $81*^ } )d>!"JB- L:'J
Bhg 5hy""i public void setSSiteURL(String value) J`^I./ { oo.2Dn6z sSiteURL = value; }O4^Cc6 } q')R4=0
K fP `b>]N_ 1N>|yQz public String getSFilePath() aUtnR<6 { uF3qD|I\ return sFilePath; t0T"@t#c } m
RO~aD!N x
a06i# QD>"]ap,o public void setSFilePath(String value) <|Pun8j { ez6EjUk sFilePath = value; q+vx_4 } I=NZokfS xcf%KXJf6 oGRhnP'PF+ public String getSFileName() M )2`+/4 { x HhN return sFileName; ;{%\9nS } {b
4BKI-;v$ \<)9?M : public void setSFileName(String value) 4zo5}L`Y { %V ;? sFileName = value; M%0C_=zg } JQ@E>o7_ [Yc G(^^ McQe1 public int getNSplitter() *NCl fkZ { 9& 83n(m return nSplitter; GJqJlgHe } Pw61_ZZ4B\ @ >U-t{W KSNPkd6 public void setNSplitter(int nCount) N
D2L_!g:( { H?X|(r|+ nSplitter = nCount; TBT:/Vfun } ={xE!" } 7!JQB WV_.Tiy< *N<&GH(j /* y;o^- O **Utility.java &Ob!4+v/GP */ $
.
9V& package NetFox; >\Ww;1yV O6G0 :HwA 5Z# public class Utility { [+DW >Et <U\B!fO' gY8>6'~mS public Utility() A"rfZ` { LpqO{#ZG l|k`YC x z\%Ls
} _c_[C*T]
x}8yXE" //线程睡眠 L|}lccpI public static void sleep(int nSecond) \hEN4V[ { ]n~ilS.rkl try{ ~"kb7Fxp Thread.sleep(nSecond); Ot6aRk } pv Gf\pu catch(Exception e) +y3%3EKs1~ { suzZdkMA e.printStackTrace (); 65aK2MS@ } !74S } W|g4z7Pb 7M<'/s //日志 8Hn|cf0 public static void log(String sMsg) #kaY0M { @dPTk"P System.err.println(sMsg); y3o25}" } io{@^1ab Qh'ATo 6U R2IxbE public static void log(int sMsg) [c|]f_ZdK { &bfA.&
` System.err.println(sMsg); &-B^~M*?? } Nbi.\ } k@3Q|na 283F)T\Rv Z*= $8e@ /* x?2@9u8Yb **TestMethod.java R&BTA */ L'0B$6 package NetFox; OZ~5*v yU-e3O7L sWc*5Rt public class TestMethod { \Yc'~2n 0,89H4 V#S9H!hm$ public TestMethod() \(^nSy&N { ///xx/weblogic60b2_win.exe 5a|w+HO, try{ z;|A(*Y SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); r[b(I@T+ //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); <?riU\-]y SiteFileFetch fileFetch = new SiteFileFetch(bean); ='s(| fileFetch.start(); F.=2u"[*& } C8V/UbA
/ catch(Exception e){e.printStackTrace ();} BlA_.]Sg$ xgKdMW'%g: 'z%o16F)L } xQ^E"Q,1 noml8o V`XNDNJ: public static void main(String[] args) K,:cJ { ECrex>zr% new TestMethod(); uP~@U" ! } Vt".%d/`7 } 2[O&NdP\Zk 点击下载更多相关资料
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