java pg_dump

在Java中使用pg_dump可以通过使用Runtime.exec()方法来调用命令行执行pg_dump命令。以下是一个示例代码：

public static void backupDatabase() {
    String host = "localhost";
    String port = "5432";
    String databaseName = "mydatabase";
    String username = "myusername";
    String password = "mypassword";
    String backupPath = "/path/to/backup/file.sql";
    
    String command = "pg_dump -h " + host + " -p " + port + " -U " + username + " -F p -b -v -f \"" + backupPath + "\" " + databaseName;
    
    try {
        Process process = Runtime.getRuntime().exec(command);
        BufferedReader reader = new BufferedReader(new InputStreamReader(process.getErrorStream()));
        String line;
        while ((line = reader.readLine()) != null) {
            System.out.println(line);
        }
        reader.close();
    } catch (IOException e) {
        e.printStackTrace();
    }
}

在这个示例中，我们使用pg_dump命令备份了名为“mydatabase”的数据库，并将备份文件保存在“/path/to/backup/file.sql”路径下。请注意，您需要将命令中的主机名，端口号，数据库名，用户名，密码和备份路径替换为您自己的值。