Java文件操作类FileManager 博客分类： java java

读写文件是最常用的操作之一，每次将相应的代码片段复制过来不仅麻烦，还会影响整体的美观。为此我单独写了一个文件操作的类，需要时先把这个类的代码粘过去，再调用就方便多了。

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();
}
}
}

 　调用示例：

　　写入 FileManager.write("Hello, World!", "D:\\test.txt", "UTF-8");

　　读取 System.out.println(FileManager.read("D:\\test.txt", "UTF-8"));