How to connect to Oracle as “SYS” from SQL*Plus in Java

Question

I want to connect to Oracle as SYS from SQL*Plus in Java. But I am not able to connect. But I am able to connect as user named SCOTT. My code snippet i

Answer 1

You're passing all the connection information as a single value; equivalent to this from a command line:

sqlplus "sys as sysdba/tiger@<connect_string>"

which would get the same response of printing the SQL*Plus logon help. You also have your password in the wrong place but it isn't getting that far. From a command line this would work:

sqlplus "sys/tiger" "as" "sysdba@<connect_string>"

so you need to pass 5 arguments to ProcessBuilder, something like:

    String sqlCmd = "sqlplus";  
    String arg1   = "sys/tiger";
    String arg2   = "as";
    String arg3   = "sysdba@(DESCRIPTION=(ADDRESS=(PROTOCOL=TCP)(Host=hostname)(Port=PORT ID))(CONNECT_DATA=(SID=SID)))";
    String arg4   = fileName;
    ...
        ProcessBuilder pb = new ProcessBuilder(sqlCmd, arg1, arg2, arg3, arg4);

This will still only work if your environment is configured to allow remote connection as sysdba. Doing anything as sys should be very rare, and having a script you want to run as sys seem unusual enough for a Java wrapper to seem like overkill - and makes it seem like you might connect as sys routinely, which is not a good idea - but maybe this is just a learning exercise.

Answer 2

Think your arg1 should be as below:

              String arg1   = "scott as sysdba/<syspwd>@(DESCRIPTION=(ADDRESS=(PROTOCOL=TCP)(Host=hostname)(Port=PORT ID))(CONNECT_DATA=(SID=SID)))";

Answer 3

You can easily call sqlplus from java like below.

String stringCommand =
            "sqlplus " + dbUser + "/" + dbPassword + "@(description=(address=(protocol=TCP)" +
                    "(host=" + dbHost + ")(port=" + dbPort + "))(connect_data=(service_name=" + dbName + "))) " +
                    "@" + sqlScriptFile + "";       

    int exitCode;
    Runtime rt = Runtime.getRuntime();
    Process process = null;
    try {
        process = rt.exec(stringCommand);
        exitCode = process.waitFor();
    } finally {
        process.destroy();
    }

Answer 4

I found the answer by hit and try and its the connection string.

If one wants to connect as sysdba/sysoper the connection string should be like:

public static void test_script () {  
  String fileName = "@t.sql";  
  String sqlPath = "D:\\";  
  String sqlCmd = "sqlplus";  
  // IP_address,portid and sid are variables to be entered and t.sql is the file to be read .It contains show user command 
  String arg3   = "sys/oracle123@(DESCRIPTION=(ADDRESS=(PROTOCOL=TCP)(Host=IP_address)(Port=portid))(CONNECT_DATA=(SID=sid))) as sysdba";
  String arg4= fileName;
  try {  
    String line;  
    ProcessBuilder pb = new ProcessBuilder(sqlCmd,arg3,arg4);
    Map<String, String> env = pb.environment();  
    env.put("VAR3", arg3);
    env.put("VAR4", arg4);
    pb.directory(new File(sqlPath));  
    pb.redirectErrorStream(true);  
    Process p = pb.start();  
    BufferedReader bri = new BufferedReader(new InputStreamReader(p.getInputStream()));  
    BufferedReader bre = new BufferedReader(new InputStreamReader(p.getErrorStream()));  
    while ((line = bri.readLine()) != null) {  
        System.out.println(line);  
    }       
    bri.close();  
    while ((line = bre.readLine()) != null) {  
        System.out.println(line);  
    }  
    bre.close();  
    System.out.println("\n\n\n");
    System.out.println("Done.");  
  } catch (Exception err) {  
    err.printStackTrace();  
  }  
}