WEB开发网      濠电姷鏁告繛鈧繛浣冲洤纾瑰┑鐘宠壘閻ょ偓銇勯幇鍫曟闁稿鍠愰妵鍕冀閵娧佲偓鎺楁⒒閸曨偄顏柡宀嬬畱铻e〒姘煎灡绗戦梻浣筋嚙濮橈箓顢氳濠€浣糕攽閻樿宸ュΔ鐘叉啞缁傚秹宕滆绾惧ジ寮堕崼娑樺缂佹宀搁弻鐔风暋閻楀牆娈楅梺璇″枓閺呯姴鐣疯ぐ鎺濇晝闁靛牆妫欓蹇旂節閻㈤潧浠﹂柛銊ョ埣楠炴劙骞橀鑲╋紱闂佽宕樼粔顔裤亹閹烘挸浜归梺缁樺灦閿曗晛螞閸曨垱鈷戦柟鑲╁仜婵″ジ鎮楀☉鎺撴珖缂侇喖顑呴鍏煎緞濡粯娅囬梻浣瑰缁诲倿寮绘繝鍥ㄦ櫇闁稿本绋撻崢鐢告煟鎼淬垻鈯曢柨姘舵煟韫囥儳绋荤紒缁樼箖缁绘繈宕橀妸褌绱濋梻浣筋嚃閸ㄤ即宕弶鎴犳殾闁绘梻鈷堥弫鍌炴煕閳锯偓閺呮瑧妲愬Ο琛℃斀闁绘劕妯婇崵鐔封攽椤旇棄鍔ら摶鐐烘煕閺囥劌澧柛娆忕箻閺屽秹宕崟顒€娅g紓浣插亾濠㈣泛顑囩粻楣冩煙鐎涙ḿ绠橀柨娑樼У椤ㄣ儵鎮欓鍕紙闂佽鍠栫紞濠傜暦閹偊妲诲┑鈩冨絻椤兘寮诲☉銏犖╅柕澶堝労閸斿绱撴担绋库偓鍝ョ矓瑜版帒鏋侀柟鍓х帛閺呮悂鏌ㄩ悤鍌涘 ---闂傚倸鍊烽悞锔锯偓绗涘厾娲煛閸涱厾顔嗛梺璺ㄥ櫐閹凤拷
开发学院WEB开发Jsp 用Java简单实现文件分割与合并 阅读

用Java简单实现文件分割与合并

 2008-01-05 18:32:31 来源:WEB开发网 闂傚倸鍊风欢姘缚瑜嶈灋闁圭虎鍠栫粻顖炴煥閻曞倹瀚�闂傚倸鍊风粈渚€骞夐敓鐘插瀭闁汇垹鐏氬畷鏌ユ煙閹殿喖顣奸柛搴$У閵囧嫰骞掗幋婵冨亾閻㈢ǹ纾婚柟鐐灱濡插牊绻涢崱妤冃℃繛宀婁簽缁辨捇宕掑鎵佹瀸闂佺懓鍤栭幏锟�濠电姷鏁告慨顓㈠箯閸愵喖宸濇い鎾寸箘閹规洟姊绘笟鈧ḿ褍煤閵堝悿娲Ω閳轰胶鍔﹀銈嗗笂閼冲爼鍩婇弴銏$厪闁搞儮鏅涙禒褏绱掓潏鈺佷槐闁轰焦鎹囬弫鎾绘晸閿燂拷闂傚倸鍊风欢姘缚瑜嶈灋闁圭虎鍠栫粻顖炴煥閻曞倹瀚�  闂傚倸鍊烽懗鑸电仚缂備胶绮〃鍛村煝瀹ュ鍗抽柕蹇曞У閻庮剟姊虹紒妯哄闁圭⒈鍋嗛惀顏囶樄闁哄本娲樼换婵婄疀閺囩姷鐛ラ梻浣哄帶婢瑰﹥绂嶅⿰鍫氣偓鏃堝礃椤忎礁浜鹃柨婵嗛婢ь喖霉閻樻瑥瀚粻楣冩煕椤愩倕鏋庨柣蹇嬪劜閵囧嫰寮村Ο鍝勫Е濡炪們鍨洪悷鈺呭箖閳╁啯鍎熼柕鍥у簻閹凤拷
核心提示: 主要应用IO的RandomaccessFile(听说断点续传也是用它实现) import java.io.*;class Fen{String fileName;int size;Fen(String fileName,String size){this.fileName = fileName;this.size

  主要应用IO的RandomaccessFile(听说断点续传也是用它实现)
 import java.io.*;

class Fen{
String fileName;
int size;

Fen(String fileName,String size){
this.fileName = fileName;
this.size = Integer.parseInt(size)*1024;
}

public void cut()throws Exception{
int maxx = 0;
File inFile = new File(fileName);

int fileLength = (int)inFile.length(); //取得文件的大小
int value; //取得要分割的个数

RandomAccessFile inn = new RandomAccessFile(inFile,"r");//打开要分割的文件


value = fileLength/size;

int i=0;
int j=0;

//根据要分割的数目输出文件
for (;j File outFile = new File(inFile.getName()+j+"zzii");
RandomAccessFile outt= new RandomAccessFile(outFile,"rw");
maxx+=size;
for (;i outt.write(inn.read());
}
outt.close();
}
File outFile = new File(inFile.getName()+j+"zzii");
RandomAccessFile outt= new RandomAccessFile(outFile,"rw");
for(;i
outt.write(inn.read());
}
outt.close();

inn.close();
}
}


class He{
String fileName;
String filterName;

He(String fileName,String filterName){
this.fileName = fileName;
this.filterName = filterName;
}


public void unite()throws Exception{
String [] tt;
File inFile = new File("."); //在当前目录下的文件
File outFile = new File(fileName); //取得输出名
RandomAccessFile outt= new RandomAccessFile(outFile,"rw");

//取得符合条件的文件名
tt = inFile.list(new FilenameFilter(){
public boolean accept(File dir,String name){
String rr = new File(name).toString();
return rr.endsWith(filterName);
}
});
//打印出取得的文件名
for (int i = 0;i System.out.PRintln(tt[i]);
}

//打开所有的文件再写入到一个文件里
for(int i=0;i inFile = new File(tt[i]);
RandomAccessFile inn= new RandomAccessFile(inFile,"r");
int c;
while((c=inn.read())!=-1)
outt.write(c);
}

outt.close();
}
}


public class test{
public static void main(final String [] args)throws Exception{

if(args.length==0){
print();
return;
}
if(args[0].equals("-c")){
Fen cutt = new Fen(args[1],args[2]);
cutt.cut();
}
else if (args[0].equals("-r")){
He hee = new He(args[1],args[2]);
hee.unite();
}
else
print();

}

public static void print(){
System.out.println("usage:\n分: java test -c file1 size(单位为K)\n合 java test -r file2 zzii(我设置的方便标识)");
}
}

Tags:Java 简单 实现

编辑录入:爽爽 [复制链接] [打 印]
赞助商链接