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Java 读取TXT文件的多种方式

2014-10-15 09:27 489 查看
1).按行读取TXT文件

package zc;
import java.io.BufferedReader;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileReader;
import java.io.IOException;

public class readLine {

public static void main(String[] args) {
// TODO Auto-generated method stub
File file = new File("C:/zc.txt");
BufferedReader reader = null;
String tempString = null;
int line =1;

try {
System.out.println("以行为单位读取文件内容,一次读一整行:");
reader = new BufferedReader(new FileReader(file));
while ((tempString = reader.readLine()) != null) {
System.out.println("Line"+ line + ":" +tempString);
line ++ ;
}
reader.close();
} catch (FileNotFoundException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}finally{
if(reader != null){
try {
reader.close();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}
}
}

2).按字节读取TXT文件

package zc;

import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.InputStream;

public class readerFileByChars {

public static void main(String[] args) {
// TODO Auto-generated method stub
File file = new File("c:/zc.txt");
InputStream in = null;
byte[] tempByte = new byte[1024];
int byteread = 0;

try {
System.out.println("以字节为单位读取文件内容,一次读多个字节:");
in = new FileInputStream(file);
while ((byteread = in.read(tempByte)) != -1 ) {
System.out.write(tempByte, 0, byteread);
}
} catch (FileNotFoundException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}finally{
if (in != null) {
try {
in.close();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}
}
}
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