postgresql 数据库备份

import java.text.SimpleDateFormat;
import java.util.Date;

public class Test {

	public static void main(String[] args) {
		Date d = new Date(); // 备份文件名称
		SimpleDateFormat sdf = new SimpleDateFormat("yyyyMMddHHmmss");
		String filename = sdf.format(d) + ".sql";

		// ///////////////以下是数据库信息////////////////////

		// 数据库名称
		String dbname = "wm_advert";
		// 表名称
		String tablename = "wm_ad_location";
		// 数据库地址
		String dbhost = "10.0.0.254";
		// 数据库用户名
		String username = "wm_psql";
		// 数据库恢复用到的文件的名称
		String restorefilename = "20140426172335.sql";
		// 备份客户端的路径
		String dbpath = "C:\\Progra~1\\Postgresql\\9.3\\bin\\";
		// 备份下来的文件的完整路径
		String backuppath = "C:\\Users\\admin\\" + filename;
		// 恢复用到的文件的完成路径
		String restorepath = "C:\\Users\\admin\\" + restorefilename;

		// 数据库端口
		String dbport = "5432";

		//new test().backupDB(dbname,tablename,username,backuppath,dbpath,//	dbhost,dbport);
		 new test().restoreDB(dbname,restorepath,dbhost,dbport);
	}

	public boolean backupDB(String dbname,String tablename,String username,String backuppath,String dbpath,String dbhost,String dbport) {
		// 本地测试用
		// username = "postgres";
		// String dbpath = "C:\\Progra~1\\Postgresql\\9.3\\bin\\";

		boolean flag = true;// 备份是否成功
		Runtime rt = Runtime.getRuntime();// 得到jvm的运行环境
		Process process;
		StringBuffer cmdbuf = new StringBuffer();
		cmdbuf.append(dbpath);
		cmdbuf.append("pg_dump -U ");// 用户名
		cmdbuf.append(username);
		cmdbuf.append(" -h ");
		cmdbuf.append(dbhost);
		cmdbuf.append(" -p ");
		cmdbuf.append(dbport);
		cmdbuf.append(" -f ");
		cmdbuf.append(backuppath);
		cmdbuf.append(" -E utf8 ");// 编码
		cmdbuf.append(" -t ");
		cmdbuf.append(tablename);
		cmdbuf.append(" ");
		cmdbuf.append(dbname);

		try {
			// 调用 cmd:
			System.out.println(cmdbuf);
			process = rt.exec(cmdbuf.toString());
		} catch (Exception e) {
			flag = false;
			e.printstacktrace();
		}
		return flag;
	}

	public boolean restoreDB(String dbname,String restorepath,String dbport) {

		boolean flag = true;// 恢复是否成功
		Runtime rt = Runtime.getRuntime();// 得到jvm的运行环境
		Process process;
		StringBuffer cmdTemp = new StringBuffer();// 命令模版
		cmdTemp.append(dbpath);
		cmdTemp.append("psql -U ");// 用户名
		cmdTemp.append(username);
		cmdTemp.append(" -h ");
		cmdTemp.append(dbhost);
		cmdTemp.append(" -p ");
		cmdTemp.append(dbport);
		cmdTemp.append(" -d ");
		cmdTemp.append(dbname);
		cmdTemp.append(" -f ");
		cmdTemp.append(restorepath);

		try {
			System.out.println(cmdTemp);
			process = rt.exec(cmdTemp.toString());// 还原数据库
		} catch (Exception e) {
			flag = false;
			e.printstacktrace();
		}
		return flag;
	}
}