package com.cn.springbootdatabase; import java.io.*; import java.text.SimpleDateFormat; import java.util.Date; public class cc { public static void main(String[] args) { /*// 數據庫導出 String user = "root"; // 數據庫帳號 String password = "123456"; // 數據庫密碼 String database = "home"; // 需要備份的數據庫名 String filepath = "D:\\mysql.sql"; // 需要備份到的地址 String stmt1 = "mysqldump " + database + " -u " + user + " -p" + password + " --result-file=" + filepath; try { Runtime.getRuntime().exec(stmt1); System.out.println("數據已導出到文件" + filepath + "中"); } catch (IOException e) { e.printStackTrace(); }*/ SimpleDateFormat sd=new SimpleDateFormat("yyyyMMddHHmmss"); String root = "root"; String rootPass = "123456"; String dbName = "home"; String backupsPath = "D:"; String backupsSqlFileName = "homeDB_"+sd.format(new Date())+".sql"; dbBackUp(root, rootPass, dbName, backupsPath, backupsSqlFileName); backup(); load(); } public static String dbBackUp(String root,String rootPass,String dbName,String backupsPath,String backupsSqlFileName) { //生成臨時備份文件 // SimpleDateFormat sd=new SimpleDateFordckupsSqlFileName; String pathSql = backupsPath+backupsSqlFileName; try { File fileSql = new File(pathSql); if(!fileSql.exists()){ fileSql.createNewFile(); } StringBuffer sbs = new StringBuffer(); sbs.append("mysqldump "); sbs.append(" -h 127.0.0.1 "); sbs.append(" -u "); sbs.append(root+" "); sbs.append("-p"+rootPass+" "); sbs.append(dbName); sbs.append(" --default-character-set=utf8 "); // sbs.append(">"+pathSql); sbs.append(" --result-file="+pathSql); System.out.println("cmd命令為：——>>>"+sbs.toString()); Runtime runtime = Runtime.getRuntime(); Process child = runtime.exec(sbs.toString()); //讀取備份數據並生成臨時文件 InputStream in = child.getInputStream(); OutputStreamWriter writer = new OutputStreamWriter(new FileOutputStream(pathSql), "utf8"); BufferedReader reader = new BufferedReader(new InputStreamReader(in, "utf8")); String line=reader.readLine(); while (line != null) { writer.write(line+"\n"); line=reader.readLine(); } writer.flush(); System.out.println("數據庫已備份到——>>"+pathSql); } catch (Exception e) { } return pathSql; } public static boolean backup() {//備份 SimpleDateFormat sd=new SimpleDateFormat("yyyyMMddHHmmss"); try { Runtime rt = Runtime.getRuntime(); String mysql = "mysqldump -uroot -p123456 home --default-character-set=utf8 "; // mysql ="C:\\Program Files\\MySQL\\MySQL Server 5.5\\bin"+mysql; System.out.println("mysql=============>>>>"+mysql); // 調用 mysql 的 cmd: Process child = rt .exec("cmd /c "+mysql);// 設置導出編碼為utf8。這裡必須是utf8 // 把進程執行中的控制檯輸出信息寫入.sql文件，即生成了備份文件。注：如果不對控制檯信息進行讀出，則會導致進程堵塞無法運行 InputStream in = child.getInputStream();// 控制檯的輸出信息作為輸入流 InputStreamReader xx = new InputStreamReader(in, "utf8");// 設置輸出流編碼為utf8。這裡必須是utf8，否則從流中讀入的是亂碼 String inStr; StringBuffer sb = new StringBuffer(""); String outStr; // 組合控制檯輸出信息字符串 BufferedReader br = new BufferedReader(xx); while ((inStr = br.readLine()) != null) { sb.append(inStr + "\r\n"); } outStr = sb.toString(); // 要用來做導入用的sql目標文件： FileOutputStream fout = new FileOutputStream( "D:/homeDB_"+sd.format(new Date())+".sql"); OutputStreamWriter writer = new OutputStreamWriter(fout, "utf8"); writer.write(outStr); // 注：這裡如果用緩衝方式寫入文件的話，會導致中文亂碼，用flush()方法則可以避免 writer.flush(); // 別忘記關閉輸入輸出流 in.close(); xx.close(); br.close(); writer.close(); fout.close(); System.out.println("/* Output OK! */"); String error="備份成功!"; } catch (Exception e) { e.printStackTrace(); } return true; } public static boolean load() {//還原 try { String fPath = "D:/mysql.sql"; Runtime rt = Runtime.getRuntime(); // 調用 mysql 的 cmd: Process child = rt.exec("mysql -uroot -p123456 home "); OutputStream out = child.getOutputStream();//控制檯的輸入信息作為輸出流 String inStr; StringBuffer sb = new StringBuffer(""); String outStr; BufferedReader br = new BufferedReader(new InputStreamReader( new FileInputStream(fPath), "utf8")); while ((inStr = br.readLine()) != null) { sb.append(inStr + "\r\n"); } outStr = sb.toString(); OutputStreamWriter writer = new OutputStreamWriter(out, "utf8"); writer.write(outStr); // 注：這裡如果用緩衝方式寫入文件的話，會導致中文亂碼，用flush()方法則可以避免 writer.flush(); // 別忘記關閉輸入輸出流 out.close(); br.close(); writer.close(); System.out.println("/* Load OK! */"); } catch (Exception e) { e.printStackTrace(); } return true; } }
mysql數據庫的備份和還原
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