-
UID:2537
-
- 注册时间2006-05-09
- 最后登录2020-05-29
- 在线时间3小时
-
- 发帖8
- 搜Ta的帖子
- 精华
0
- 铜板1641
- 人品值95
- 贡献值0
- 交易币0
- 好评度8
- 信誉值0
- 金币0
-
访问TA的空间加好友用道具
- 发帖
- 8
- 铜板
- 1641
- 人品值
- 95
- 贡献值
- 0
- 交易币
- 0
- 好评度
- 8
- 信誉值
- 0
- 金币
- 0
- 所在楼道
|
/* YY!Rz[/ **SiteFileFetch.java f;b[w */ O?|gp<=d package NetFox; f!JS= N?3 import java.io.*; Qubp9C#r import java.net.*; ^#sU*trr Dtj&W<NXo !/wtYI-` public class SiteFileFetch extends Thread { mrw=T. *M"}z h2D>;k SiteInfoBean siteInfoBean = null; //文件信息Bean %VnbmoO long[] nStartPos; //开始位置 s~Te long[] nEndPos; //结束位置 /bVoErf FileSplitterFetch[] fileSplitterFetch; //子线程对象
XcjRO#s\ long nFileLength; //文件长度 0L/n ?bf boolean bFirst = true; //是否第一次取文件 CvD"sHVq% boolean bStop = false; //停止标志 q|),`.eh\ File tmpFile; //文件下载的临时信息 Q@HopiC DataOutputStream output; //输出到文件的输出流 eow'K
821A }I>tO9M //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) LEtG|3Dx public SiteFileFetch(SiteInfoBean bean) throws IOException k`N^Vdr { L+q/){Dd( siteInfoBean = bean; G
nG>7f[v //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); aca=yDs2 tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); $b mLu=9 if(tmpFile.exists ()) a0#J9O_ { (I./ Uu% bFirst = false; }1upi=+aE read_nPos(); .;N 1N^ } (UxW; else V=*wKuB { <Sr nStartPos = new long[bean.getNSplitter()]; [)TRTxFb nEndPos = new long[bean.getNSplitter()]; .Fp4:
e } N}t
2Nu- \7'+h5a 5bgs*.s - RU=z!{ } )<tI!I][j S@/IQR c.e2 M/ public void run() i ,/0/?)*_ { NN?`"Fww //获得文件长度 PGoh1Uu //分割文件 J
G{3EWXR //实例FileSplitterFetch Kh_Lp$'0uM //启动FileSplitterFetch线程 k1D@fiz //等待子线程返回 3(,?S$> try{ rQ qW_t% if(bFirst) EU+S^SyZi { =aTv! 8</ nFileLength = getFileSize(); h[@tZ(jrY if(nFileLength == -1) 9'X7wG { &eX!#nQ_. System.err.println("File Length is not known!"); |Ur"&
Z{ } {fjdr else if(nFileLength == -2) BNs@n"k { V6,H}k System.err.println("File is not access!"); fd.^h*'mU } OL^l 3F else ,]d/Q< { L bmawi^ for(int i=0;i<nStartPos.length;i++) JVSA&c%3 { ybKWOp:O nStartPos = (long)(i*(nFileLength/nStartPos.length)); "[ZB+-|[0 } /x
p| for(int i=0;i<nEndPos.length-1;i++) }xh$T'M8 { :BV6y|J9O^ nEndPos = nStartPos[i+1]; B e0ND2oo } [UWdW nEndPos[nEndPos.length-1] = nFileLength; !*B'?|a<\ } )u`[6,d } ia+oX~W!VR z?*w8kU&> 7\ s"o&G //启动子线程 ?b>,9A.Z fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; IHv[v*4: for(int i=0;i<nStartPos.length;i++) )x=1]T>v"' { Evg_q> fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), Eu@huN*/ siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), S(*sw
0O@+ nStartPos,nEndPos,i); %_%Q8,W Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); #W.#Hjpp fileSplitterFetch.start(); 2Tp1n8FV } U!*M*s // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), _)>_{Pm siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); U"^kH| // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", ,N]H dR nEndPos = " + nFileLength); \=ux atw // fileSplitterFetch[nPos.length-1].start(); (G;lx =k^Y?. po2! //等待子线程结束 UMm!B `M //int count = 0; biU^[g(" //是否结束while循环 r\-uJ~8N boolean breakWhile = false; b((M)Gz Gsq00j
&<Z 2Ay*kmW while(!bStop) n%o5kVx0 { >\P@^ h] write_nPos(); SVh 7zh Utility.sleep(500);
\kMefU breakWhile = true; %,@e^3B zkuU5O afuOeZP for(int i=0;i<nStartPos.length;i++) deV
8 { 'mFqEn if(!fileSplitterFetch.bDownOver) Z8@J`0x { xRzFlay8 breakWhile = false; 1q:2\d] break; 7'W%blg!V } {byBcG } J$GUB3
G if(breakWhile) 1VG4S){}\9 break; Uyg5i[&X@ ZQ%'`q\c ~-_kM //count++; 2a`o
&S //if(count>4) L\xk:j1[ // siteStop(); kwo3`b } KyYM fC #FCnA Ybs\ES'?A System.err.println("文件下载结束!"); %7IugHH9y } p93r'&Q catch(Exception e){e.printStackTrace ();} T?tgdJ } #~2%) 7XTkX"zKj 8hOk{xs8 //获得文件长度 NV72 public long getFileSize() irFMmI b { ORHp$Un~) int nFileLength = -1; ?mFv0_!O try{ ff,pvk8N5 URL url = new URL(siteInfoBean.getSSiteURL()); _VRpI)mu HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); Vt %bI0# httpConnection.setRequestProperty("User-Agent","NetFox"); \IV1j)I"u 0ghGBuv1s }Qn&^[[miL int responseCode=httpConnection.getResponseCode(); (:TjoXXiY if(responseCode>=400) DEG[Z7Ju { .f%fHj processErrorCode(responseCode); Wz49i9e+d return -2; //-2 represent access is error [q)8N } bMg(B-uF7 Ui_8)z _ !;Yg/'vD- String sHeader; cl=EA6P\X cl[BF'.H 5\5/ for(int i=1;;i++) Y)0*b5?1r { }Jy8.<Gd^ //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); AS'R?aX|C //Utility.log(in.readLine()); /YW>*?"N sHeader=httpConnection.getHeaderFieldKey(i); p*4':TFuD; if(sHeader!=null) :dl]h&C^ { C*)3e*T* if(sHeader.equals("Content-Length")) GP!?^r:en { |[<_GQl nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); U@_dm/;0& break; EUD~CZhS"k } ZRh~`yy } \qdHX else 0%&1\rm+j break; l&OKBUG } y~AVei& } DBW[{DE catch(IOException e){e.printStackTrace ();} WejYy| catch(Exception e){e.printStackTrace ();} w28o}$b` @=bLDTx;c) A!s`[2 Z Utility.log(nFileLength); jSh5!6O 2,$8icM Cc+t}"^ return nFileLength; "bFTk/ } &gVN& r?+%?$ H*RC@O_hv //保存下载信息(文件指针位置) >Ea8G, private void write_nPos() ~
-4{B { 4IB9,?p try{ p `8s output = new DataOutputStream(new FileOutputStream(tmpFile)); :1cV;gJ output.writeInt(nStartPos.length); gn8R[5:!V for(int i=0;i<nStartPos.length;i++) FcR=v0), { T6O::o6 // output.writeLong(nPos); |% F=po>w output.writeLong(fileSplitterFetch.nStartPos); 3KRd output.writeLong(fileSplitterFetch.nEndPos); b3&zjjQ } Y>|B;Kj0( output.close(); l4 D+Y } ?{P"O!I{ catch(IOException e){e.printStackTrace ();} {C 6=[ catch(Exception e){e.printStackTrace ();} iEVb"w059 } x5,++7Tz 9_# >aOqL 7`-Zuf //读取保存的下载信息(文件指针位置) 3c#BKHNC private void read_nPos() %+@O#P { @K\~O__ try{ q}`${3qQ3 DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); D"Bl:W'?j int nCount = input.readInt(); /7aBDc-v nStartPos = new long[nCount]; =e/9&993 nEndPos = new long[nCount]; s>B5l2Q4 for(int i=0;i<nStartPos.length;i++) j`JMeCG=Ee { )IP,;< nStartPos = input.readLong(); iZ#!O*> nEndPos = input.readLong(); ]{)a,c NG } 4,bv)Im+ ` input.close(); Ttu2 skcv } sv: 9clJ catch(IOException e){e.printStackTrace ();} nno}e/zqf catch(Exception e){e.printStackTrace ();} hv`~?n)D66 } N|8P) 9v;Vv0k_ Od)Uv1 private void processErrorCode(int nErrorCode) H{@Yo\J { #o=y?( System.err.println("Error Code : " + nErrorCode); b(*!$EB } s[M?as a=1NED' N+m)/x
=: //停止文件下载 nGpXI\K public void siteStop() T}Km?d { xHUsFms bStop = true; `n#H5Oyn for(int i=0;i<nStartPos.length;i++) ZOft.P O fileSplitterFetch.splitterStop(); In:9\7~jC
t9,\Hdo mPOGidxix } K{x\4 } ~x A-V4. //负责部分文件的抓取 @GBxL*e **FileSplitterFetch.java Sc>,lIM */ S'|,oUWDb package NetFox; ujDd1Bxf? C\S3Gs T_i:}ul import java.io.*; $*SW8'],` import java.net.*; >sfRI]OG whmdcVh. n(b(yXYm] public class FileSplitterFetch extends Thread { 4~k\j J4QXz[dG ta35 K" String sURL; //File URL DwaBdN[!7 long nStartPos; //File Snippet Start Position LM$W* long nEndPos; //File Snippet End Position aO]ZZleNS int nThreadID; //Thread's ID x^HGVWw_ boolean bDownOver = false; //Downing is over =@m &s^R boolean bStop = false; //Stop identical vX{J' H]u FileAccessI fileAccessI = null; //File Access interface pf%=h
| $h5xH9x
; }O/U;4Z public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException =q>'19^Jx { VbJiZw(aR this.sURL = sURL; NhfJ30~ this.nStartPos = nStart; DQNnNsP:M- this.nEndPos = nEnd; z8jk[5z nThreadID = id; VO,!x~S! fileAccessI = new FileAccessI(sName,nStartPos);//定位 ZRv*!n(Ug< } TMAJb+@l: ;,$NAejgd O!zV)^r public void run() m`IC6* { U1@IX4^2` while(nStartPos < nEndPos && !bStop) {G|,\O1 { [DJ flCR& s8QMewU ?Y)vGlWDW< try{ tkVbo.[8K URL url = new URL(sURL); pA`+hQNN HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); nA?`BOe( httpConnection.setRequestProperty("User-Agent","NetFox"); 3!3xCO String sProperty = "bytes="+nStartPos+"-"; l]@&D#3ZM httpConnection.setRequestProperty("RANGE",sProperty); x9$` W Utility.log(sProperty); _.>QEh5"5 2{]`W57_= aiQ>xen5C5 InputStream input = httpConnection.getInputStream(); YCdS!&^UN //logResponseHead(httpConnection); !zuxz K)-U1JE7 ln$&``L byte[] b = new byte[1024]; 6,"IDH|ND int nRead; =CK4.
while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) 5j:0Yt { 4,..kSA3iw nStartPos += fileAccessI.write(b,0,nRead); ~u)}ScTp //if(nThreadID == 1) ]p*l%(dhY // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); V\6=ySx } VOKZ dC- p%iGc<vHX 3Dg,GaRk Utility.log("Thread " + nThreadID + " is over!"); WzAb|&? bDownOver = true; JCz@s~f\y //nPos = fileAccessI.write (b,0,nRead); F
;{n"3< } .EpV;xq} catch(Exception e){e.printStackTrace ();} Cnnh7` } ^:6{2 2C{ } ~oI1zNz/ n/DP>U$I& N<f"] //打印回应的头信息 @WJgWJm public void logResponseHead(HttpURLConnection con) wDcj,:h` { vK 7^*qr;j for(int i=1;;i++) y@ ML/9X8q { ykv94i?Q String header=con.getHeaderFieldKey(i); `o<'
x.I if(header!=null) |B.0TdF //responseHeaders.put(header,httpConnection.getHeaderField(header)); _= +V/= Utility.log(header+" : "+con.getHeaderField(header)); ,pqGX3 else Ae
mDJ8Y break; J+[_Wd } "nZ*{uv } wyp|qIS; )u3 Zm 0*%Z's\M" public void splitterStop() iDMJicW!+F { :r%P.60H X bStop = true; nNrPHNfqD } ~}F{vm =Qh\D NXwz$}}Pp } W4hbK9y Z&0'a 8'~[pMn` /* UjaK&K+M? **FileAccess.java ="x\`+U *//文件访问(定位,写) xm%Um\Pb7 package NetFox; }xBc0gr import java.io.*; +lJG(Qd y|CP;:f; Xg<*@4RD8 public class FileAccessI implements Serializable{ !xP8#|1 t0z!DOODZP //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 n.wF&f'D] RandomAccessFile oSavedFile; XID<(HBA"! long nPos; j*F`"df !
vP[;6 ELBa}h; public FileAccessI() throws IOException rrQQZ5fh b { 20vXSYa~ this("",0); D!.[q -< } 350_CN, Y3r%B9~ %FXfqF9 public FileAccessI(String sName,long nPos) throws IOException A:aE|v/T& { /V8}eZ97 oSavedFile = new RandomAccessFile(sName,"rw"); ^dP KDrKxh this.nPos = nPos; F_Y7@Ei/ oSavedFile.seek(nPos); ZN!4; } 1"/He ` 4 j{Hao\F8 9;Itqe{8w public synchronized int write(byte[] b,int nStart,int nLen) G"X8}:} { R<sJ^nx int n = -1; t'BLVCu try{ (7XCA,KTGI oSavedFile.write(b,nStart,nLen); _/Gczy4)# n = nLen; V6t,BJjS } `kbSu} catch(IOException e) 6T+FH;h
{ NG e.printStackTrace (); Mr?Xp(.}G } j6>.n49_ .u:81I=w( r) $+ return n; (4'$y`Z } P`#Z9 HM4 g)s{IAVx BYs-V: } f8M$45A' p!sWYui `!Ds6 /* CamE' **SiteInfoBean.java 1QmH{jM */ o&`<+4
i package NetFox; 2WtRJi?b| F#5B<I 2P/K
K public class SiteInfoBean { c6nflk.l tjGd ) k$H%.l;E private String sSiteURL; //Site's URL '~ ,p[ private String sFilePath; //Saved File's Path ][W_[0v private String sFileName; //Saved File's Name K?s+ 3 private int nSplitter; //Count of Splited Downloading File FDVcow*] n 9AxCiT. w=^`w:5X public SiteInfoBean() w QNxL5B {//nSplitter的缺省值为5 Bn61AFy` //default value of nSplitter is 5 ,hq)1u this("","","",5); ua5OGx } Kv.>Vf.T}_ wD68tG$ \[gReaI public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) {?J/c{=/P { :4MB]v[K sSiteURL= sURL; A,%C,*)Cg sFilePath = sPath; Hir Fl sFileName = sName; Ga# :P F0 this.nSplitter = nSpiltter; 9cEv&3 aYuD>rD x~GQV^(l3 } {"&SJt[%X /1x,h"T\< 'XzXZJ[uq public String getSSiteURL() ~zSCg|"r { @+9<O0 return sSiteURL; %^1cyk } ,WvY$_#xW% K_2|_MLlZ EL8NZ%:v: public void setSSiteURL(String value) yaG= j { .&9 i sSiteURL = value; dbOdq } FXzFHU/dP z I+\Oll#Q H ,+?
t public String getSFilePath() xdf82) { NzU,va N return sFilePath; qf=1?=l291 } /9zE^YcT V5GW:QT Ma8_:7`>O public void setSFilePath(String value) rg{9UVj { {dL?rQ>5L sFilePath = value; 94 e):
jS } ;x:rZV/ %H]lGN) X=Ys<TM, public String getSFileName() q^A+<d { 3,]gEE3 return sFileName; RjWqGr;bO } Wm);C~Le $KLD2BAL I! > \#K public void setSFileName(String value) {X[ HCfJd { #
eCjn sFileName = value; *P 3V } `ORECg) e"'#\tSG zGc:
@z public int getNSplitter() + +aL4: { )u/H>;L P return nSplitter; u`olW%C/T } Q>R>R*1.j m}8[#: >~`r:0', public void setNSplitter(int nCount) I
j$lDJS { ,_X/Gb6) nSplitter = nCount; K
=wBpLB } XuD=E } rHf&:~ + J{0 E <JV"@H= /* m8SA6Y\ **Utility.java $&"V^@ */ Ndo a4L)$ package NetFox; hUD7_arKF
zfc3)7 ?UK|>9y}Z public class Utility { lj{VL}R o/C\d$i' {q<03d~9|G public Utility() zOV=9"~{ { j:}D Bk H-3Eo#b# _[Vf547vS } 6<N5_1 ?W(6 //线程睡眠 K]U;?h&CZc public static void sleep(int nSecond) M.nvB) { RGn!{= try{ kKPi:G52F Thread.sleep(nSecond); W`"uu.~f } +uBLk0/)> catch(Exception e) "wlt> SU { f>s?4 e.printStackTrace (); r}0\}~'?c } $t5V=}m> } [!
'op0 #U*_1P0h //日志 `Pw*_2 public static void log(String sMsg) `60gFVu { 4;HJ;0-ps System.err.println(sMsg); MwfOy@|N } '{[5M!B w~#nYM=fP! -tnQCwq# public static void log(int sMsg) BW"&6t#kA { dgDy5{_ System.err.println(sMsg); McoK@q; } 8)kLV_+% } gORJWQv \`ZW* EtPI ]r3Kg12Mi /* S}f?.7 **TestMethod.java :5/Uh/sX */ 2 o#,kGd package NetFox; 4O:W#bx <$N"q :QWq"cBem public class TestMethod { J*l4|^i< oQv3GpO \}~s2Y5j public TestMethod() Y-'78BJk { ///xx/weblogic60b2_win.exe 0<PR+Iv*i try{ }<z_Q_b+e SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); fK&e7j`qO //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); @:tj<\G] SiteFileFetch fileFetch = new SiteFileFetch(bean); G&;j6<h l fileFetch.start(); be e5 } /T,Z>R catch(Exception e){e.printStackTrace ();} RUr=fEH []0mX70N /)xlJUq } QZX~T|Ckv BS&;n SxK:]Aw public static void main(String[] args) \uME+NF { +[J/Zw0{ new TestMethod(); EZ.!rh~+ } &20P,8@ } :L_BG)dM 点击下载更多相关资料
|