java调用pg_dump备份postgre数据库问题

[kuyesuifeng]

在项目中,用java调用pg_dump进行postgre数据库备份,在本地机上跑,可以正确运行,发布到其他机器上之后,会在调用外部程序,进行备份的地方卡住,代码如下:

/**备份数据库**/
			File workPath=fetchDBInstallPath();//获取数据库的pg_dump工具的目录
			if(workPath==null){
				return false;
			}
			String dbBackupPath=fetchDBBackupPath();
			StringBuffer sb=new StringBuffer();
			sb.append("cmd /c pg_dump -h 127.0.0.1 -p 5432 -U postgres -F c -b -v -f ").append(dbBackupPath+"\\"+fileName+".backup").append(" dbname");
			log.info("**********************************************");
			log.info("workPath="+workPath);
			log.info("command:"+sb.toString());
			log.info("**********************************************");
			Process process=Runtime.getRuntime().exec(sb.toString(),null,workPath);
			log.info("~~~~~~~~~~~~~~~~~~~~~~~~~~~");
			StreamGobbler errorGobbler = new StreamGobbler(process.getErrorStream(), "Error");   //线程,用于输出外部程序的输出内容,防止阻塞
			StreamGobbler outputGobbler = new StreamGobbler(process.getInputStream(), "Output");   //线程,用于输出外部程序的输出内容,防止阻塞
			log.info("+++++++++++++++++++++++++++");
			errorGobbler.start();   
			outputGobbler.start();   
			process.waitFor();
			if(process.exitValue()!=0){
				return false;
			}

从部署机器上的日志来看,运行完成了log.info("+++++++++++++++++++++++++++");
之后,线程没有正确运行,也就是说,应该是外部程序被阻塞了,然后我把命令行中的-v参数去掉,不让外部程序输出内容,可还是会阴塞,具体日志如下:

2012-10-12 10:23:43.551 INFO] **********************************************
2012-10-12 10:23:43.551 INFO] workPath=C:\Program Files\hikvision\CMS\database\bin
2012-10-12 10:23:43.551 INFO] command:cmd /c pg_dump -h 127.0.0.1 -p 5432 -U postgres -F c -b -v -f c:\backup\test.backup 5221cms
2012-10-12 10:23:43.551 INFO] **********************************************
2012-10-12 10:23:43.711 INFO] ~~~~~~~~~~~~~~~~~~~~~~~~~~~
2012-10-12 10:23:43.711 INFO] +++++++++++++++++++++++++++

[zhaoxiao]

在命令前添加一行：

set PGPASSWORD=<password>