-
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
|
/* {;$oC4 **SiteFileFetch.java -}7$;QK&a */ 7D'\z
IW package NetFox; {"o9pIh{~ import java.io.*; *@rA7zPFf import java.net.*; ]d*9@+Iu oW~W(h! yP"2.9\erH public class SiteFileFetch extends Thread { 5/.W-Q\pl} yi$CkG} `KQx#c>' SiteInfoBean siteInfoBean = null; //文件信息Bean jg$qp%7i% long[] nStartPos; //开始位置 Dk
`&tr long[] nEndPos; //结束位置 Ejk;(rxI FileSplitterFetch[] fileSplitterFetch; //子线程对象 eWH0zswG long nFileLength; //文件长度 ~WA@YjQ] boolean bFirst = true; //是否第一次取文件 tZ]gVgZg boolean bStop = false; //停止标志 c=sV"r? File tmpFile; //文件下载的临时信息 *Y> w0k DataOutputStream output; //输出到文件的输出流 QK_5gD`$a, jKUEs75] //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) =~:IiK/# public SiteFileFetch(SiteInfoBean bean) throws IOException n|5\Q { Y3 $jNuV siteInfoBean = bean; .s{"NqRA //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); x`6MAZ tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); LOU P if(tmpFile.exists ()) BlJiHz! { p4T$(]7 bFirst = false; Jm_)}dj3o read_nPos(); '_v~+ } IO)Y0J>x else &2ED<%hH` { Jv} nStartPos = new long[bean.getNSplitter()]; {!Qu(% nEndPos = new long[bean.getNSplitter()]; ItVN,sVJb } mSYjc)z M`Y^hDl 6 %lCZ7z2o H-_gd.VD } !Fl'?Kz ::Zo` vP /WQ.,a public void run() EL,k z8 { \%7*@& //获得文件长度 /,G `V //分割文件 }UyQGRZ= //实例FileSplitterFetch eB0exPz% //启动FileSplitterFetch线程 <8WFaP3, //等待子线程返回 (3n "a' try{ snaAn?I4 if(bFirst) "0eX/rY% { oc1BOW z nFileLength = getFileSize(); |~Dl<#58 if(nFileLength == -1) ~& -h5=3 { 5RPG3ppS System.err.println("File Length is not known!"); B&cIx~+ } r;Sk[Y5# else if(nFileLength == -2) u=:f%l { /+*"*Br/ System.err.println("File is not access!"); +bumWOQ' } }40T'y else '| i?-(f) { jOGdq;| for(int i=0;i<nStartPos.length;i++) G9:XEEN { z +MH co" nStartPos = (long)(i*(nFileLength/nStartPos.length)); y_m+&Oe } P&0eu for(int i=0;i<nEndPos.length-1;i++) wI@87& { P j nEndPos = nStartPos[i+1]; t/;2rIx> } 3;>ls~4 nEndPos[nEndPos.length-1] = nFileLength; nCY kUDnZ } b,'O|s]"Sc } $d*9]M4 vT?^# JL6$7h //启动子线程 /l$enexSt fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; yd;e;Bb7* for(int i=0;i<nStartPos.length;i++) &jJu=6 U
B { zsp%Cz7T fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), 7P1Pk?pxy siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), aqON6|6K nStartPos,nEndPos,i); v~mVf.j1 Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); O},}-%G fileSplitterFetch.start(); >V6t
L;+ } s|\)Y*B` // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(),
KQr+VQdq> siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); $cSUB // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", R1zt6oY nEndPos = " + nFileLength); yXU.PSG* // fileSplitterFetch[nPos.length-1].start(); neFwxS? oxxuw
Dcl bv4umL / //等待子线程结束 {;{U@Z //int count = 0; rI>x'0Go* //是否结束while循环 pwFdfp boolean breakWhile = false; c{=;lT -`faXFW' 9L>?N:%5 while(!bStop) COw"6czX/ { T8+[R2_ write_nPos(); i.E2a) Utility.sleep(500); %axr@o[ breakWhile = true; ei5YxV6I }5+^ H~FI@Cf$L for(int i=0;i<nStartPos.length;i++) t'eaR- { 5_(\Cd<# if(!fileSplitterFetch.bDownOver) Qj^Uz+b { Wj.t4XG! breakWhile = false; QXb2jWz break; L"b&O<No } Bt<)1_ } S)U*1t7[
if(breakWhile) kp*v:* break; I# tlaz# -DkD*64wu X$!fR >Zc //count++; x17:~[c'] //if(count>4) Em!- W5*s // siteStop(); E&8Nh J } i)x0]XF ov+{<0Q
Wep^He\: System.err.println("文件下载结束!"); |u>V>
PN } 33~MP; catch(Exception e){e.printStackTrace ();} uZld9u } rD}g9?ut 'iW CQ2vFg3+o //获得文件长度 5M>h[Q"R public long getFileSize() 9G[
DuYJI { d`/8Q9tQ int nFileLength = -1; jG1(Oe;# try{ M8-8T URL url = new URL(siteInfoBean.getSSiteURL()); UV2W~g HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); Ur+U#} httpConnection.setRequestProperty("User-Agent","NetFox"); E`j' <#V! cq[9#@
4= |Z>-<]p9g int responseCode=httpConnection.getResponseCode(); li[[AAWVm if(responseCode>=400) Jh.~]\u { ?;RY/[IX6 processErrorCode(responseCode); XHA|v^ return -2; //-2 represent access is error +JI,6)Ry } %1
)c{7 dy+A$)gY< 5$ik|e^:y String sHeader; 1KUjb@" |pHlBzHj
P7w
RX F{ for(int i=1;;i++) ku,{NY
f^Y { O[ z0+Q?6Z //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); &KMI C //Utility.log(in.readLine()); Lyc6nP;F
sHeader=httpConnection.getHeaderFieldKey(i); bhD-;Y!6; if(sHeader!=null) !Q"L)%)'A { -Y524
if(sHeader.equals("Content-Length")) }aOqoi7w { 8Ay7I nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); \HB
fM& break; F%V|Aa } Il&FC } a8TtItN else &S(>L[)9 break; 62ru%<x= } IN/$b^Um } 4Wgzp51Aq! catch(IOException e){e.printStackTrace ();} 9"^ib9M catch(Exception e){e.printStackTrace ();} z*T41;b #U- y<[
3 F9LKO3Rh#u Utility.log(nFileLength); =+_nVO* 2Rw<0.i| P
DY :?/ return nFileLength; At@0G\^ } rd&d~R6 $W|JQ h ,~cK]!:>s //保存下载信息(文件指针位置) 6Mk#) ebM private void write_nPos() ; s(bd#Q { sq=EL+=j try{ b;
of9hY output = new DataOutputStream(new FileOutputStream(tmpFile)); Hx6ODj[- output.writeInt(nStartPos.length); ]0'cdC for(int i=0;i<nStartPos.length;i++) r??_2>Q { E"*E[> // output.writeLong(nPos); D`QMlRzXy output.writeLong(fileSplitterFetch.nStartPos); _b8KK4UR output.writeLong(fileSplitterFetch.nEndPos); k(G6` dY } @Nb/n output.close(); <U$YJtEK } 1M`>;fjYa catch(IOException e){e.printStackTrace ();} <SJ6<' catch(Exception e){e.printStackTrace ();} =p@2[Uo } n`^jNXE eTjPztdJbx z(c8] Wu# //读取保存的下载信息(文件指针位置) 9wCgJ$te private void read_nPos() (P?|Bk[ { \X\< +KU try{ a)W|gx6Y DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); Y
22Ai int nCount = input.readInt(); pF6u3] nStartPos = new long[nCount]; *
4J!@w nEndPos = new long[nCount]; "tl{HM5u for(int i=0;i<nStartPos.length;i++) JjZB!Lg= { Otu?J_ d3 nStartPos = input.readLong(); |};d:LwX nEndPos = input.readLong(); #qVvh3#g } w &YUb,{Y input.close(); ?J6Ek*E# } #NyO' catch(IOException e){e.printStackTrace ();} )7Hx<?P catch(Exception e){e.printStackTrace ();} RNB-W% } gm5%X'XL KRGj6g+ 9.xb-m7 private void processErrorCode(int nErrorCode) {
(.@bT@ { ;m]
n l_vg System.err.println("Error Code : " + nErrorCode); W2h*t"5W } 78]*Jx>L a9&[Qv5-/ \roJf&O } //停止文件下载 pGU.+[|( public void siteStop() UQkd$w< { r1q'+i bStop = true; =~D[M)UO| for(int i=0;i<nStartPos.length;i++) 8Mtd}{Fw* fileSplitterFetch.splitterStop(); hTO5*5]0zP m^BXLG:b 5vD\?,f E } h)sT37 } 'r=2f6G>cP //负责部分文件的抓取 W 8`6O2 **FileSplitterFetch.java hwk] ;6[ */ tWl')^ package NetFox; \a0{9Xx F ir}*E=* u0)O Fz import java.io.*; r[):'ys,C import java.net.*; =M:Po0?0E fiC0'4., ?v,c) public class FileSplitterFetch extends Thread { tMdSdJ8 V1P]pP ?$)a[UnqX String sURL; //File URL <9H3d7% long nStartPos; //File Snippet Start Position Q7pCF,; long nEndPos; //File Snippet End Position Otr=+i
ZI int nThreadID; //Thread's ID :?EZ\WM7 boolean bDownOver = false; //Downing is over Lm!]m\LRZD boolean bStop = false; //Stop identical ox<6qW FileAccessI fileAccessI = null; //File Access interface C:&Sk\
wGMoh.GTh ;*K;)C public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException XU<owk { h('5x,G% this.sURL = sURL; !m=Js" this.nStartPos = nStart; GYy8kp84 this.nEndPos = nEnd; 3,Z;J5VL4! nThreadID = id; )y:M8((% fileAccessI = new FileAccessI(sName,nStartPos);//定位 K_t >T)K } ]?}pJ28 \+Qd=,!i( HQF@@ public void run() .mwW`D { VWd`06'BN' while(nStartPos < nEndPos && !bStop) i\Yd_ { 7H6Ge-u jB9~'>JY DB|w&tygq try{ F@z%y'5 Z* URL url = new URL(sURL); %d-WQwJ HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); RwK6u-u#9 httpConnection.setRequestProperty("User-Agent","NetFox"); 1fJ~Wp @1 String sProperty = "bytes="+nStartPos+"-"; ~U7Bo(EJp httpConnection.setRequestProperty("RANGE",sProperty); 3J8>r|u;1' Utility.log(sProperty);
;j~%11 TUGD!b{ EGFP$nvq InputStream input = httpConnection.getInputStream(); Qa2p34Z/ //logResponseHead(httpConnection); }#~E-N3x |gk4X%o6 LB.B w byte[] b = new byte[1024]; +F,])p4,]i int nRead; p4\sKF8- while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) y] 9/Xr/ { uDcs2^2l nStartPos += fileAccessI.write(b,0,nRead); D'moy*E //if(nThreadID == 1) rkh%[o9"/ // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); .`u8(S+ } Bk~lM' ZJFF4($qN >^W6'Q$P< Utility.log("Thread " + nThreadID + " is over!"); vEG7A$Z" bDownOver = true; c9@3=6S/ //nPos = fileAccessI.write (b,0,nRead); }"RVUYU } 4a!%eBhX"K catch(Exception e){e.printStackTrace ();} SH"<f_ } um<$L } r.u\qPT& 2u0B=0x ETX>wZ //打印回应的头信息 AL&<SxuP public void logResponseHead(HttpURLConnection con) :%28*fl { jL)Y' for(int i=1;;i++)
5Uhxl^c { 8.%wnH String header=con.getHeaderFieldKey(i); V\n!?1{kdF if(header!=null) uARkf' //responseHeaders.put(header,httpConnection.getHeaderField(header)); N*PJ m6- Utility.log(header+" : "+con.getHeaderField(header)); 3,!IV"_ else 247vU1 break; `6YN/"unfp } ]m&Ss } #5^OO ou| fQ.S ,lMe 7N5M=f.DS( public void splitterStop() 2cS94h { TZn5s~t bStop = true; 2t0VbAO1{ } ]
fA5D)/m< aWvC-vZk zLxuxf~4@ } [P6A$HC< cJSwA&
.R4,fCN /* TR
`C|TV> **FileAccess.java Zu~t )W *//文件访问(定位,写) 2h}FotlO package NetFox; "-5FUKI- import java.io.*; qauvwAMuX lA6{TH.x &liFUP?
public class FileAccessI implements Serializable{ S,'ekWVD 0>;[EFL //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 7)> L#(N RandomAccessFile oSavedFile; wpNb/U long nPos; p Zxx q+;lxR5D cF iTanu public FileAccessI() throws IOException 5ff5M=M { ;_ 1Rk&o! this("",0); uTl"4;&j } ,Cy&tRjR B m<;MOS ulEtZ#O{_ public FileAccessI(String sName,long nPos) throws IOException 3+C;zDKa { VVuNU"- oSavedFile = new RandomAccessFile(sName,"rw"); f*m^x7 this.nPos = nPos; QD-Bt=S7l oSavedFile.seek(nPos); "79b> } >r4BI}8SK< u2':~h?l c*(=Glzn public synchronized int write(byte[] b,int nStart,int nLen) V6Of(;r { b
ts*qx&) int n = -1; PKGqu,J, try{ )1YGWr;ykS oSavedFile.write(b,nStart,nLen); ;s4e8![o3 n = nLen; a@? Bv } 4VA]S catch(IOException e) dry%aT { v9gaRqi8 e.printStackTrace (); f7%g=0.F } Tjj27+y*\ =*UVe%N4 y#O/Xw return n; r$LU$F } Fvnf;']q ZxDh!_[s ,6A/| K- } '1G0YfG}n hig t(u !l9#a{#6l /* 6Tq2WZ}<' **SiteInfoBean.java Pi%-bD/w */ # M
Y4Mr package NetFox; l`:-B'WM An
BM*5G F=UW[zy/[ public class SiteInfoBean { COH.`Tv{* #S|On[Q! h`tf!M D] private String sSiteURL; //Site's URL *@YQr]~
; private String sFilePath; //Saved File's Path {PL,3EBG private String sFileName; //Saved File's Name
y}W*P#BDO private int nSplitter; //Count of Splited Downloading File Kc3/*eu; k$,y1hH;f8 `y1,VY public SiteInfoBean() @d^MaXp_P {//nSplitter的缺省值为5 b#S-u }1PE //default value of nSplitter is 5 YIl,8!
z~ this("","","",5); %!L*ec%, } OJ7y %VrMlG4hx 2T"[$iH!7 public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) XpT})AV { a7]Z_Gk sSiteURL= sURL; sJ_3tjs) sFilePath = sPath; kPnuU! sFileName = sName; ]/mRMm9"3h this.nSplitter = nSpiltter; Yp$@i20 c[?&;# feV 1fh6A`c } u/`x@u 2bpFQ8q T
zHR public String getSSiteURL() :O*62olC5 { ,^T0!k$ return sSiteURL; ZB,UQ~!Yr } KeC&a=HL YgkQF0+ %bhFl,tL public void setSSiteURL(String value) >>>MTV f { ,0n=*o@W sSiteURL = value; u z:@ } )Mw 3ZE92 7$:Jea MV?sr[V-oP public String getSFilePath() Wp=&nh { PE+{<[n return sFilePath; ;BEX|wxn } /<IXCM. Mwd.S 71HrpTl1fw public void setSFilePath(String value) WQY\R!+ { z`|E0~{- sFilePath = value; jx];=IC3tt } %U&ztvR0C ]Ai!G7s8P YZ5[# E@l public String getSFileName() I8:G:s: { 'i8?]`
T return sFileName; 4"V6k4i5 } S)A;!}RK6 2ZQ|nwb7 +|spC public void setSFileName(String value) ; 5!8LmZ0# { ;:ocU? sFileName = value; $/P\@|MqYQ } NJ!}(=1|K D+Z,;XZ vP/sG5$x public int getNSplitter()
1);E!D[ { G)7J$4R return nSplitter; hmtDw,j } -"n8Wv >
,P,{"
l65Qk2<YC public void setNSplitter(int nCount) uulzJbV,K { )0 i$Bo nSplitter = nCount; S >\\n^SbT } yI$MqR } ~ePtK~,dv _v=zFpR \1#!%I=. /* hKFB=U **Utility.java m\J"P'= */ 7e@Bkq0) package NetFox; Zq\ p%AU9 LwEc*79 ]4&B*]j public class Utility { A,GJ6qp3 coc:$Sr% P,SI0$Z public Utility() ~DK=&hCd! { 0,[-4m =zKbvwe%X *",
BP]] } kv?j]<WN )]m_ L$9 //线程睡眠 :X-\!w\ public static void sleep(int nSecond) <=!|U0YV
{ 05vu{> try{ ou'|e "tI Thread.sleep(nSecond); 4 {3<
` } 8*yky catch(Exception e) tsqWnz=) { R{Qvpd$y e.printStackTrace (); ogKd}qTov } WevXQ-eKm } qt#4i.Iu+ %p.hwgvnp //日志 O7tL,)Vv public static void log(String sMsg) 7)+%;|~ { >R8eAR$N System.err.println(sMsg); qy~@cPT } 9mH+Ol#( l j*J|%~ O(f&0h
! public static void log(int sMsg) 6dX l ny1H { U})Z4>[bvt System.err.println(sMsg); [=I==?2`X } p9$=."5 } &T/}|3S HA%r:Px xDBHnr}[ /*
al:c2o **TestMethod.java Q\<^ih51 */ }x}JzA+2 package NetFox; Oe%jV,S |V wa4(tM2 ]gGCy '*) public class TestMethod { $5m_)]w4a jF%[.n[BU LC:bHM,e public TestMethod() N?;5%pG
< { ///xx/weblogic60b2_win.exe B[Fuy y? try{ eFeWjB'<7 SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); #NLLlEE //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); 1)f~OL8o SiteFileFetch fileFetch = new SiteFileFetch(bean); y[@<goT fileFetch.start(); k/ ZuFTN } yS:1F
PA$_ catch(Exception e){e.printStackTrace ();} 2Md'<. IKV:J9 ZIrJ"*QO= } ewcgg kaj6C_k| ';bovh@* public static void main(String[] args) !56gJJ-r { R]{AJ"p new TestMethod(); U1^R+ *yp } `L=$,7` } R7 *ek_ 点击下载更多相关资料
|