无论是二进制数据还是字符数据（文本数据），都可以用文件输出流java.io.FileOutputStream，以字节流的方式保存到指定文件。
package test;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.OutputStream;
class LogWrite{
private static boolean fileLog = true;
private static String logFileName = "E:/workspace/Java/result/result.txt";//指定程序执行结果保存的文件路径
public static OutputStream getOutputStream() throws IOException{
if(fileLog)
{
File file = new File(logFileName);
if(!file.exists())
file.createNewFile();
return new FileOutputStream(file, true);
}
else
{
return System.out;
}
}
public static void log(String info) throws IOException{
OutputStream out = getOutputStream();
out.write(info.getBytes("utf-8"));
}
}
public class Test1 {
public static void main(String[] args) throws IOException {
// TODO Auto-generated method stub
LogWrite.log("hello world");//"hello world"会保存到result.txt文件中
}
}