写入内容到文件中

package com.zhiru;import java.io.File;import java.io.FileOutputStream;import java.io.IOException;import java.io.OutputStream;public class WriteToFile {private String fName;WriteToFile(String f) {fName = f;}public void writeToFile(String what) throws IOException {//想文件中追加新的内容OutputStream out = new FileOutputStream(new File(fName),true);byte[] b = what.getBytes();out.write(b);out.flush();out.close();}}