java编程:读取一个字符串写入一个文件中

jsdk 1.5.0_12
用命令行工作:命令行形式
java.exe -cp [classpath] StringWriter 帮助 你的 是我 f:\a.txt

import java.io.*;
final public class StringWriter {
private static boolean isParameterValid(String[] args) {if (args == null) return false;return args.length > 1;}

private static void writeString(final String[] s,final OutputStream out) throws IOException {
for (String str : s) out.write(str.getBytes());
out.close();
}

public static void main(String[] args) throws IOException {
if (!isParameterValid(args)) {
System.out.println("参数格式: str1 str2 str3 .. str[n] <file>");
System.exit(1);
}
writeString(args,new FileOutputStream(args[args.length - 1]));
}
}