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{         backup("d:\\d.sql");         recover("d:\\d.sql");     }     public static void backup(String path) throws IOException{         Runtime runtime = Runtime.getRuntime();         //-u后面是用户名，-p是密码-p后面最好不要有空格，-family是数据库的名字         Process process = runtime.exec("mysqldump -u root -p123456 family");         InputStream inputStream = process.getInputStream();//得到输入流，写成.sql文件         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();         //-u后面是用户名，-p是密码-p后面最好不要有空格，-family是数据库的名字，--default-character-set=utf8，这句话一定的加         //我就是因为这句话没加导致程序运行成功，但是数据库里面的内容还是以前的内容，最好写上完成的sql放到cmd中一运行才知道报错了         //错误信息：         //mysql: Character set 'utf-8' is not a compiled character set and is not specified in the '         //C:\Program Files\MySQL\MySQL Server 5.5\share\charsets\Index.xml' file ERROR 2019 (HY000): Can't         // initialize character set utf-8 (path: C:\Program Files\MySQL\MySQL Server 5.5\share\charsets\)，         //又是讨人厌的编码问题，在恢复的时候设置一下默认的编码就可以了。         Process process = runtime.exec("mysql -u root -p123456 --default-character-set=utf8 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();     } }