方法一：
一、桌面上准备 DataObject.txt 文件，内容为：
二、打开 Eclipse，编写代码如下：
import java.io.BufferedReader;
import java.io.File;
import java.io.FileReader;
import java.util.ArrayList;
import java.util.List;
import javax.swing.filechooser.FileSystemView;
public class test003 {
public static void main(String[] args) {
FileSystemView fsv = FileSystemView.getFileSystemView();
File com = fsv.getHomeDirectory();
String deskPath = com.getPath();
String filePath = deskPath + "\\" + "DataObject.txt";
List<String> list = new ArrayList<String>();
try {
list = getFileContext( filePath );
for( int i = 0; i < list.size(); i++ ) {
String lineStr = list.get(i);
System.out.println( "lineStr = " + lineStr );
}
} catch (Exception e) {
e.printStackTrace();
}
}
/**
* 获取txt文件内容, 并按行放入list中
*/
public static List<String> getFileContext( String path ) {
FileReader fileReader = null;
BufferedReader bufferedReader = null;
List<String> list = new ArrayList<String>();
String str = "";
try {
fileReader = new FileReader( path );
bufferedReader = new BufferedReader( fileReader );
while( (str = bufferedReader.readLine()) != null ) {
if( str.trim().length() > 2 ) {
list.add( str );
}
}
} catch ( Exception e ) {
e.printStackTrace();
} finally {
try {
if (bufferedReader != null) {
bufferedReader.close();
}
} catch (Exception e2) {
e2.printStackTrace();
}
try {
if (fileReader != null) {
fileReader.close();
}
} catch (Exception e2) {
e2.printStackTrace();
}
}
return list;
}
}三、执行结果为：
方法二：
一、桌面上准备 DataObject.txt 文件，内容为：
二、打开 Eclipse，编写代码如下：
import java.io.BufferedReader;
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.nio.charset.Charset;
import java.util.ArrayList;
import java.util.List;
import javax.swing.filechooser.FileSystemView;
public class test003 {
public static void main(String[] args) {
FileSystemView fsv = FileSystemView.getFileSystemView();
File com = fsv.getHomeDirectory();
String deskPath = com.getPath();
String filePath = deskPath + "\\" + "DataObject.txt";
List<String> list = new ArrayList<String>();
try {
list = readFileToList( filePath );
for( int i = 0; i < list.size(); i++ ) {
String lineStr = list.get(i);
System.out.println( "lineStr = " + lineStr );
}
} catch (Exception e) {
e.printStackTrace();
}
}
/**
* 读取文件内容到容器List
* @param fileName 文件名称
*/
public static List<String> readFileToList( String fileName ) {
List<String> list = new ArrayList<String>();
BufferedReader br = null;
try {
String line = null;
br = new BufferedReader( new UnicodeReader( new FileInputStream(fileName), Charset.defaultCharset().name()) );
while ( (line = br.readLine()) != null ) {
list.add(line);
}
} catch ( IOException e ) {
e.printStackTrace();
} finally {
try {
if (null != br) {
br.close();
}
} catch (Exception e2) {
e2.printStackTrace();
}
}
return list;
}
}UnicodeReader 类：
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.PushbackInputStream;
import java.io.Reader;
public class UnicodeReader extends Reader {
PushbackInputStream internalIn;
InputStreamReader internalIn2 = null;
String defaultEnc;
private static final int BOM_SIZE = 4;
public UnicodeReader(InputStream in, String defaultEnc) {
internalIn = new PushbackInputStream(in, BOM_SIZE);
this.defaultEnc = defaultEnc;
}
public String getDefaultEncoding() {
return defaultEnc;
}
public String getEncoding() {
if (internalIn2 == null) return null;
return internalIn2.getEncoding();
}
protected void init() throws IOException {
if (internalIn2 != null) return;
String encoding;
byte bom[] = new byte[BOM_SIZE];
int n, unread;
n = internalIn.read(bom, 0, bom.length);
if ( (bom[0] == (byte)0x00) && (bom[1] == (byte)0x00) &&
(bom[2] == (byte)0xFE) && (bom[3] == (byte)0xFF) ) {
encoding = "UTF-32BE";
unread = n - 4;
} else if ( (bom[0] == (byte)0xFF) && (bom[1] == (byte)0xFE) &&
(bom[2] == (byte)0x00) && (bom[3] == (byte)0x00) ) {
encoding = "UTF-32LE";
unread = n - 4;
} else if ( (bom[0] == (byte)0xEF) && (bom[1] == (byte)0xBB) &&
(bom[2] == (byte)0xBF) ) {
encoding = "UTF-8";
unread = n - 3;
} else if ( (bom[0] == (byte)0xFE) && (bom[1] == (byte)0xFF) ) {
encoding = "UTF-16BE";
unread = n - 2;
} else if ( (bom[0] == (byte)0xFF) && (bom[1] == (byte)0xFE) ) {
encoding = "UTF-16LE";
unread = n - 2;
} else {
encoding = defaultEnc;
unread = n;
}
if (unread > 0) internalIn.unread(bom, (n - unread), unread);
if (encoding == null) {
internalIn2 = new InputStreamReader(internalIn);
} else {
internalIn2 = new InputStreamReader(internalIn, encoding);
}
}
public void close() throws IOException {
init();
internalIn2.close();
}
public int read(char[] cbuf, int off, int len) throws IOException {
init();
return internalIn2.read(cbuf, off, len);
}
}三、执行结果为：