学步园

For stored procedure returns OUT parameters, it must be

1. Registered via JDBC CallableStatement.registerOutParameter(index,sqlType).
2. Get it back via CallableStatement.getDataType(index).

See code snippets

//getDBUSERByUserId is a stored procedure
String getDBUSERByUserIdSql = "{call getDBUSERByUserId(?,?,?,?)}";
callableStatement = dbConnection.prepareCall(getDBUSERByUserIdSql);
callableStatement.setInt(1, 10);
callableStatement.registerOutParameter(2, java.sql.Types.VARCHAR);
callableStatement.registerOutParameter(3, java.sql.Types.VARCHAR);
callableStatement.registerOutParameter(4, java.sql.Types.DATE);
 
// execute getDBUSERByUserId store procedure
callableStatement.executeUpdate();
 
String userName = callableStatement.getString(2);
String createdBy = callableStatement.getString(3);
Date createdDate = callableStatement.getDate(4);

JDBC CallableStatement Example

See a full JDBC CallableStatement example for OUT parameter.

1. Stored Procedure

A stored procedure in Oracle database, with IN and OUT parameters. Later, calls it via JDBC.

CREATE OR REPLACE PROCEDURE getDBUSERByUserId(
	   p_userid IN DBUSER.USER_ID%TYPE,
	   o_username OUT DBUSER.USERNAME%TYPE,
	   o_createdby OUT  DBUSER.CREATED_BY%TYPE,
	   o_date OUT DBUSER.CREATED_DATE%TYPE)
IS
BEGIN
 
  SELECT USERNAME , CREATED_BY, CREATED_DATE
  INTO o_username, o_createdby,  o_date 
  FROM  DBUSER WHERE USER_ID = p_userid;
 
END;
/

2. Calls Stored Procedure via CallableStatement

JDBC example to call a stored procedure via CallableStatement.

File : JDBCCallableStatementOUTParameterExample.java

package com.mkyong.jdbc;
 
import java.sql.CallableStatement;
import java.sql.Date;
import java.sql.DriverManager;
import java.sql.Connection;
import java.sql.SQLException;
 
public class JDBCCallableStatementOUTParameterExample {
 
	private static final String DB_DRIVER = "oracle.jdbc.driver.OracleDriver";
	private static final String DB_CONNECTION = "jdbc:oracle:thin:@localhost:1521:MKYONG";
	private static final String DB_USER = "user";
	private static final String DB_PASSWORD = "password";
 
	public static void main(String[] argv) {
 
		try {
 
			callOracleStoredProcOUTParameter();
 
		} catch (SQLException e) {
 
			System.out.println(e.getMessage());
 
		}
 
	}
 
	private static void callOracleStoredProcOUTParameter() throws SQLException {
 
		Connection dbConnection = null;
		CallableStatement callableStatement = null;
 
		String getDBUSERByUserIdSql = "{call getDBUSERByUserId(?,?,?,?)}";
 
		try {
			dbConnection = getDBConnection();
			callableStatement = dbConnection.prepareCall(getDBUSERByUserIdSql);
 
			callableStatement.setInt(1, 10);
			callableStatement.registerOutParameter(2, java.sql.Types.VARCHAR);
			callableStatement.registerOutParameter(3, java.sql.Types.VARCHAR);
			callableStatement.registerOutParameter(4, java.sql.Types.DATE);
 
			// execute getDBUSERByUserId store procedure
			callableStatement.executeUpdate();
 
			String userName = callableStatement.getString(2);
			String createdBy = callableStatement.getString(3);
			Date createdDate = callableStatement.getDate(4);
 
			System.out.println("UserName : " + userName);
			System.out.println("CreatedBy : " + createdBy);
			System.out.println("CreatedDate : " + createdDate);
 
		} catch (SQLException e) {
 
			System.out.println(e.getMessage());
 
		} finally {
 
			if (callableStatement != null) {
				callableStatement.close();
			}
 
			if (dbConnection != null) {
				dbConnection.close();
			}
 
		}
 
	}
 
	private static Connection getDBConnection() {
 
		Connection dbConnection = null;
 
		try {
 
			Class.forName(DB_DRIVER);
 
		} catch (ClassNotFoundException e) {
 
			System.out.println(e.getMessage());
 
		}
 
		try {
 
			dbConnection = DriverManager.getConnection(
				DB_CONNECTION, DB_USER,DB_PASSWORD);
			return dbConnection;
 
		} catch (SQLException e) {
 
			System.out.println(e.getMessage());
 
		}
 
		return dbConnection;
 
	}
 
}

Done.

Reference

1. http://download.oracle.com/javase/6/docs/api/java/sql/CallableStatement.html
2. http://docsrv.sco.com/JDK_guide/jdbc/getstart/callablestatement.doc.html
3. http://onjava.com/pub/a/onjava/2003/08/13/stored_procedures.html

转自：http://www.mkyong.com/jdbc/jdbc-callablestatement-stored-procedure-out-parameter-example/