java 备份、还原postgresql数据库

hao1nan

　　设计到几个方面：
　　1、java 执行 linux 或windows命令
　　2、数据库备份还原命令
　　3、postgresql 备份还原命令 没有密码参数，目前仅程序与数据库在同一服务器上执行通过。

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) + ".tar";
String dbname = "ipam";
String username = "postgres";
String dbpath = "d:\\Program Files\\PostgreSQL\\9.1\\bin\\";
String backuppath = "d:\\" + filename;
//new Test().backupDB(dbname, username, backuppath, dbpath);
backuppath = "d:\\20120826095554.tar";
new Test().restoreDB(dbname, username, backuppath, dbpath);
}
public boolean backupDB(String dbname, String username, String backuppath,
String dbpath) {
// 本地测试用
// username = "postgres";
// String dbpath = "d:\\Program Files\\PostgreSQL\\9.1\\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(" -f ");
cmdbuf.append(backuppath);
cmdbuf.append(" -E utf8 ");// 编码
cmdbuf.append(" -Ft ");
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 username, String backuppath,
String dbpath) {
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("pg_restore -U ");
cmdTemp.append(username);
cmdTemp.append(" -c -d ");
cmdTemp.append(" " + dbname + " ");
cmdTemp.append(backuppath);
try {
process = rt.exec(cmdTemp.toString());// 还原数据库
} catch (Exception e) {
flag = false;
e.printStackTrace();
}
return flag;
}
}