Java来恢复MySql数据，但是报错了什么管道已结束，找了好久都没找到原因。哎。该怎么处理

package com.hancai.base.admin.action;import java.io.BufferedReader;import java.io.File;import java.io.FileInputStream;import java.io.FileOutputStream;import java.io.IOException;import java.io.InputStream;import java.io.InputStreamReader;import java.io.OutputStream;import java.io.OutputStreamWriter;public class Test {    public static void main(String[] args) throws IOException{        recover("d:\\fjsdljfls.sql");    }    public static void backup(String path) throws IOException{        Runtime runtime = Runtime.getRuntime();        Process process = runtime.exec("mysqldump -u root -p123456 family");        InputStream inputStream = process.getInputStream();        InputStreamReader reader = new InputStreamReader(inputStream);        BufferedReader br = new BufferedReader(reader);        String s = null;        StringBuffer sb = new StringBuffer();        while((s = br.readLine()) != null){            sb.append(s+"\r\n");        }        s = sb.toString();        System.out.println(s);        File file = new File(path);        file.getParentFile().mkdirs();        FileOutputStream fileOutputStream = new FileOutputStream(file);        fileOutputStream.write(s.getBytes());        fileOutputStream.close();        br.close();        reader.close();        inputStream.close();    }    public static void recover(String path) throws IOException{        Runtime runtime = Runtime.getRuntime();        Process process = runtime.exec("mysql -u root -p123456 family");        OutputStream outputStream = process.getOutputStream();        BufferedReader br = new BufferedReader(new InputStreamReader(new FileInputStream(path)));        String str = null;        StringBuffer sb = new StringBuffer();        while((str = br.readLine()) != null){            sb.append(str+"\r\n");        }        str = sb.toString();        System.out.println(str);        OutputStreamWriter writer = new OutputStreamWriter(outputStream,"utf-8");        writer.write(str);        writer.flush();        outputStream.close();        br.close();        writer.close();    }}

Exception in thread "main" java.io.IOException: 管道已结束。    at java.io.FileOutputStream.writeBytes(Native Method)    at java.io.FileOutputStream.write(FileOutputStream.java:260)    at java.io.BufferedOutputStream.write(BufferedOutputStream.java:105)    at sun.nio.cs.StreamEncoder.writeBytes(StreamEncoder.java:202)    at sun.nio.cs.StreamEncoder.implWrite(StreamEncoder.java:263)    at sun.nio.cs.StreamEncoder.write(StreamEncoder.java:106)    at sun.nio.cs.StreamEncoder.write(StreamEncoder.java:116)    at java.io.OutputStreamWriter.write(OutputStreamWriter.java:203)    at java.io.Writer.write(Writer.java:140)    at com.hancai.base.admin.action.Test.recover(Test.java:64)    at com.hancai.base.admin.action.Test.main(Test.java:26)