javaweb数据库备份与还原
1.设置在jdbc.properties文件里设置相关的数据库连接语句
jdbc_url=jdbc:mysql://ip地址:端口/数据库名称?characterEncoding=utf8&zeroDateTimeBehavior=round
jdbc_username=用户名
jdbc_password=用户密码2.在applicationContext.xml中读取改properties文件
<context:property-placeholder location="classpath:classpath:conf/jdbc.properties" />3.声明一个数据库连接语句对象（我这边是sysBackupAndRecoveryConfig），属性如下（省略get，set）
private String port;
private String username;
private String host;
private String password;
private String database;4.ServiceImpl层注入上面这个属性对象，并且获取applicationContext中的jdbc.properties文件中我们想要得到的属性
@Resource
private SysBackupAndRecoveryConfig sysBackupAndRecoveryConfig;
@Value("${jdbc_url}")
private String sqlUrl;
@Value("${jdbc_username}")
private String userName;
@Value("${jdbc_password}")
private String passWord;5.根据拿到的数据库连接语句url，从中解析出数据库名称，IP地址，字符编码
/**
*解析数据库连接语句获取想要的数据
*
*/
public void setBackupInfo()
{
String sqlPath=sqlUrl;
String[] split = sqlPath.split(":");
sysBackupAndRecoveryConfig.setHost(split[2].substring(2));
String[] splits= split[3].split("/");
sysBackupAndRecoveryConfig.setPort(splits[0]);
sysBackupAndRecoveryConfig.setCharset(splits[1].split("\\?")[1].split("&")[0].split("=")[1]);
sysBackupAndRecoveryConfig.setDatabase(splits[1].split("\\?")[0]);
sysBackupAndRecoveryConfig.setUsername( userName);
sysBackupAndRecoveryConfig.setPassword(passWord);
}6.数据库备份。
关键代码如下，网上有其他详细的，备份用 mysqldump
process = runtime.exec(" mysqldump -R --port="+sysBackupAndRecoveryConfig.getPort()+" -h" +sysBackupAndRecoveryConfig.getHost() +
" -p"+sysBackupAndRecoveryConfig.getPassword()+" -u" + sysBackupAndRecoveryConfig.getUsername()+ " --set-charset="+sysBackupAndRecoveryConfig.getCharset()+" " + sysBackupAndRecoveryConfig.getDatabase());完整代码
/**
* 备份
* @throws ParseException
* @throws NumberFormatException
*
*/
private FileOutputStream fileOutputStream;
private BufferedReader br ;
private InputStreamReader reader;
private InputStream inputStream;
@Override
public void dataBackup() {
String realPath=getProjectPath();
setBackupInfo();
SimpleDateFormat dateFormater = new SimpleDateFormat("yyyyMMddHHmmss");
Date date=new Date();
String sqlDate= dateFormater.format(date);
long time = new Date().getTime();
File file = new File(realPath+"/"+time);
if (!file .exists() && !file .isDirectory())
{
file.mkdirs();
}
File realfile=new File(file,sqlDate+"_"+sysBackupAndRecoveryConfig.getDatabase()+".sql");
Runtime runtime = Runtime.getRuntime();
Process process;
try {
process = runtime.exec(" mysqldump -R --port="+sysBackupAndRecoveryConfig.getPort()+" -h" +sysBackupAndRecoveryConfig.getHost() +
" -p"+sysBackupAndRecoveryConfig.getPassword()+" -u" + sysBackupAndRecoveryConfig.getUsername()+ " --set-charset="+sysBackupAndRecoveryConfig.getCharset()+" " + sysBackupAndRecoveryConfig.getDatabase());
inputStream = process.getInputStream();
reader= new InputStreamReader(inputStream,"utf-8");
br = new BufferedReader(reader);
StringBuffer sb = new StringBuffer();
String s = null;
while((s = br.readLine()) != null){
sb.append(s+"\r\n");
}
s = sb.toString();
fileOutputStream = new FileOutputStream(realfile);
fileOutputStream.write(s.getBytes());
fileOutputStream.close();
br.close();
reader.close();
inputStream.close();
} catch (IOException e1) {
delFolder(realfile.getAbsolutePath());
throw new RuntimeException("备份失败");
}finally {
try {
if (null != fileOutputStream)
{
fileOutputStream.close();
}
if (null != br)
{
br.close();
}
if (null != reader)
{
reader.close();
}
if (null != inputStream)
{
inputStream.close();
}
} catch (IOException e) {
delFolder(realfile.getAbsolutePath());
throw new RuntimeException("关闭失败");
}
}
}7.数据库还原
关键代码如下，网上有其他详细的，还原用 mysql
process = runtime.exec("mysql --default-character-set="+sysBackupAndRecoveryConfig.getCharset()+" -port"+sysBackupAndRecoveryConfig.getPort()+" -u"+sysBackupAndRecoveryConfig.getUsername()+" -p"+sysBackupAndRecoveryConfig.getPassword()+" "+sysBackupAndRecoveryConfig.getDatabase()+"");完整代码
/**
* 还原
*
*/
private OutputStream outputStream ;
private OutputStreamWriter writer;
@Override
public void dataRecovery(String fileName,String backupDate) {
setBackupInfo();
Runtime runtime = Runtime.getRuntime();
String path=getProjectPath();
String realpath = getRepath(path,fileName,backupDate);
Process process;
//本地
try {
process = runtime.exec("mysql --default-character-set="+sysBackupAndRecoveryConfig.getCharset()+" -port"+sysBackupAndRecoveryConfig.getPort()+" -u"+sysBackupAndRecoveryConfig.getUsername()+" -p"+sysBackupAndRecoveryConfig.getPassword()+" "+sysBackupAndRecoveryConfig.getDatabase()+"");
// process = runtime.exec("mysql --default-character-set=utf8 -port3306 -uroot -p9790 testtwn");
outputStream = process.getOutputStream();
br = new BufferedReader(new InputStreamReader(new FileInputStream(realpath)));
String str = null;
StringBuffer sb = new StringBuffer();
while((str = br.readLine()) != null){
sb.append(str+"\r\n");
}
str = sb.toString();
writer = new OutputStreamWriter(outputStream,"utf-8");
writer.write(str);
writer.flush();
outputStream.close();
br.close();
writer.close();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
throw new RuntimeException("还原失败");
}finally {
try {
if (null != outputStream)
{
outputStream.close();
}
if (null != br)
{
br.close();
}
if (null != writer)
{
writer.close();
}
} catch (IOException e) {
throw new RuntimeException("关闭失败");
}
}
}mysql数据库备份与还原基本就这些了，这也是我们项目的老大让我做的第一个模块，后面还用到了quartz定时器做自动备份，有时间我再整理出来，另外需要完整代码的小伙伴们可以找我，我整理出来后看看能不能发到这里。