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要将Java生成的数据存入文件，可以使用Java的文件输入输出流（FileInputStream和FileOutputStream）或者使用Java的文件写入器（FileWriter）来实现。
使用文件输入输出流的示例代码如下：
import java.io.FileInputStream; import java.io.FileOutputStream; import java.io.IOException; public class FileExample { public static void main(String[] args) { String data = "Hello, World!"; String filename = "output.txt"; try { FileOutputStream outputStream = new FileOutputStream(filename); outputStream.write(data.getBytes()); outputStream.close(); System.out.println("Data has been written to the file."); } catch (IOException e) { e.printStackTrace(); } try { FileInputStream inputStream = new FileInputStream(filename); int content; while ((content = inputStream.read()) != -1) { System.out.print((char) content); } inputStream.close(); } catch (IOException e) { e.printStackTrace(); } } } 使用文件写入器的示例代码如下：
import java.io.FileWriter; import java.io.IOException; public class FileWriterExample { public static void main(String[] args) { String data = "Hello, World!"; String filename = "output.txt"; try { FileWriter writer = new FileWriter(filename); writer.write(data); writer.close(); System.out.println("Data has been written to the file."); } catch (IOException e) { e.printStackTrace(); } } } 以上两个示例代码都会将字符串"Hello, World!"写入名为"output.txt"的文件中。
