讀寫文件是最常用的操作之一,每次將相應的代碼片段復制過來不僅麻煩,還會影響整體的美觀。為此我單獨寫了一個文件操作的類,需要時先把這個類的代碼粘過去,再調(diào)用就方便多了。
import java.io.BufferedReader;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.InputStreamReader;
import java.io.OutputStreamWriter;
import java.util.ArrayList;
import java.util.List;
public class FileManager {
public static String read(String fileName, String encoding) {
StringBuffer fileContent = new StringBuffer();
try {
FileInputStream fis = new FileInputStream(fileName);
InputStreamReader isr = new InputStreamReader(fis, encoding);
BufferedReader br = new BufferedReader(isr);
String line = null;
while ((line = br.readLine()) != null) {
fileContent.append(line);
fileContent.append(System.getProperty("line.separator"));
}
br.close();
isr.close();
fis.close();
} catch (Exception e) {
e.printStackTrace();
}
return fileContent.toString();
}
public static void write(String fileContent, String fileName, String encoding) {
try {
FileOutputStream fos = new FileOutputStream(fileName);
OutputStreamWriter osw = new OutputStreamWriter(fos, encoding);
osw.write(fileContent);
osw.flush();
osw.close();
fos.close();
} catch (Exception e) {
e.printStackTrace();
}
}
}
調(diào)用示例:
寫入 FileManager.write("Hello, World!", "D:\test.txt", "UTF-8");
讀取 System.out.println(FileManager.read("D:\test.txt", "UTF-8"));
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