Android-Context的IO功能

public class SerializerUtils {
    
    
    
    public static void save(Context c,String fileName,String data) throws IOException{
        Writer writer=null;
        try{
        OutputStream out=c.openFileOutput(fileName, Context.MODE_PRIVATE);
        writer=new OutputStreamWriter(out);
        writer.write(data);
        }finally{
            if(writer!=null){
                writer.close();
            }
        }
    }
    
    public static String load(Context c,String fileName)throws IOException{
        StringBuilder data=new StringBuilder();
        BufferedReader reader=null;
        try{
            InputStream in=c.openFileInput(fileName);
            reader=new BufferedReader(new InputStreamReader(in));
            String line=null;
            while((line=reader.readLine())!=null){
                data.append(line);
            }
        }finally{
            if(reader!=null){
                reader.close();
            }
        }
        return data.toString();
    }

}