Java Tutorial/Database/SqlServer — различия между версиями

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Текущая версия на 05:05, 1 июня 2010

Call a stored procedure with no parameters and return value.

import java.sql.CallableStatement;
import java.sql.Connection;
import java.sql.DriverManager;
public class Main {
  public static void main(String[] argv) throws Exception {
    Connection con = null;
    CallableStatement proc_stmt = null;
    Class.forName("com.microsoft.sqlserver.jdbc.SQLServerDriver");
    con = DriverManager.getConnection("jdbc:sqlserver://MYSERVER;databaseName=MYDATABASE",
        "USERID", "PASSWORD");
    proc_stmt = con.prepareCall("{ call someStoredProc() }");
    proc_stmt.executeQuery();
  }
}





Calling a Stored Procedure in a Database with no parameters

import java.sql.CallableStatement;
import java.sql.Connection;
import java.sql.DriverManager;
public class Main {
  public static void main(String[] argv) throws Exception {
    String driverName = "com.jnetdirect.jsql.JSQLDriver";
    Class.forName(driverName);
    String serverName = "127.0.0.1";
    String portNumber = "1433";
    String mydatabase = serverName + ":" + portNumber;
    String url = "jdbc:JSQLConnect://" + mydatabase;
    String username = "username";
    String password = "password";
    Connection connection = DriverManager.getConnection(url, username, password);
    CallableStatement cs = connection.prepareCall("{call myproc}");
    cs.execute();
  }
}





Connect to a database and read from table

import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.Statement;
public class Main {
  public static void main(String[] args) throws Exception {
    Class.forName("com.microsoft.jdbc.sqlserver.SQLServerDriver");
    Connection m_Connection = DriverManager.getConnection(
        "jdbc:microsoft:sqlserver://localhost:1433;DatabaseName=MyDatabase", "userid", "password");
    Statement m_Statement = m_Connection.createStatement();
    String query = "SELECT * FROM MyTable";
    ResultSet m_ResultSet = m_Statement.executeQuery(query);
    while (m_ResultSet.next()) {
      System.out.println(m_ResultSet.getString(1) + ", " + m_ResultSet.getString(2) + ", "
          + m_ResultSet.getString(3));
    }
  }
}





Connect to database and call stored procedure

import java.sql.CallableStatement;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.ResultSet;
public class Main {
  public static void main(String[] argv) throws Exception {
    Class.forName("com.microsoft.sqlserver.jdbc.SQLServerDriver");
    Connection con = DriverManager.getConnection("jdbc:sqlserver://MYSERVER;databaseName=MYDATABASE",
        "USERID", "PASSWORD");
    CallableStatement proc_stmt = con.prepareCall("{ call generateID(?) }");
    proc_stmt.setString(1, "employee");
    ResultSet rs = proc_stmt.executeQuery();
    if (rs.next()) {
      int employeeId = rs.getInt(1);
      System.out.println("Generated employeeId: " + employeeId);
    } else {
      System.out.println("Stored procedure couldn"t generate new Id");
    }
  }
}





Create a sensitive scrollable result set

import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.Statement;
public class Main {
  public static void main(String[] argv) throws Exception {
    String driverName = "com.jnetdirect.jsql.JSQLDriver";
    Class.forName(driverName);
    String serverName = "127.0.0.1";
    String portNumber = "1433";
    String mydatabase = serverName + ":" + portNumber;
    String url = "jdbc:JSQLConnect://" + mydatabase;
    String username = "username";
    String password = "password";
    Connection connection = DriverManager.getConnection(url, username, password);
    
    Statement stmt = connection.createStatement(
        ResultSet.TYPE_SCROLL_SENSITIVE, ResultSet.CONCUR_READ_ONLY);
  }
}





Creating a SQLServer Table to Store Java Types

import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.Statement;
public class Main {
  public static void main(String[] argv) throws Exception {
    String driverName = "com.jnetdirect.jsql.JSQLDriver";
    Class.forName(driverName);
    String serverName = "127.0.0.1";
    String portNumber = "1433";
    String mydatabase = serverName + ":" + portNumber;
    String url = "jdbc:JSQLConnect://" + mydatabase;
    String username = "username";
    String password = "password";
    Connection connection = DriverManager.getConnection(url, username, password);
    Statement stmt = connection.createStatement();
    //     Column Name          SQLServer Type           Java Type
    String sql = "CREATE TABLE sqlserver_all_table("
        + "col_boolean          BIT, "                // boolean
        + "col_byte             TINYINT, "            // byte
        + "col_short            SMALLINT, "           // short
        + "col_int              INTEGER, "            // int
        + "col_float            REAL, "               // float
        + "col_double           DOUBLE PRECISION, "   // double
        + "col_bigdecimal       DECIMAL(13,0), "      // BigDecimal; can also be NUMERIC(p,s)
        + "col_string           VARCHAR(254), "       // String
        + "col_date             DATETIME, "           // Date
        + "col_time             DATETIME, "           // Time
        + "col_timestamp        TIMESTAMP, "          // Timestamp
        + "col_characterstream  TEXT, "               // CharacterStream or AsciiStream (< 2 GBytes)
        + "col_binarystream     IMAGE)";              // BinaryStream (< 2 GBytes)
    stmt.executeUpdate(sql);
  }
}





Determining If a Database Supports Updatable Result Sets: An updatable result set allows modification to data in a table through the result set.

import java.sql.Connection;
import java.sql.DatabaseMetaData;
import java.sql.DriverManager;
import java.sql.ResultSet;
public class Main {
  public static void main(String[] argv) throws Exception {
    String driverName = "com.jnetdirect.jsql.JSQLDriver";
    Class.forName(driverName);
    String serverName = "127.0.0.1";
    String portNumber = "1433";
    String mydatabase = serverName + ":" + portNumber;
    String url = "jdbc:JSQLConnect://" + mydatabase;
    String username = "username";
    String password = "password";
    Connection connection = DriverManager.getConnection(url, username, password);
    DatabaseMetaData dmd = connection.getMetaData();
    if (dmd.supportsResultSetConcurrency(
        ResultSet.TYPE_FORWARD_ONLY, ResultSet.CONCUR_UPDATABLE)) {
        System.out.println("Updatable result sets are supported"); 
    } else {
        System.out.println("Updatable result sets are not supported");
    }
  }
}





Get all table catalogs

import java.sql.Connection;
import java.sql.DatabaseMetaData;
import java.sql.DriverManager;
import java.sql.ResultSet;
public class Main {
  public static void main(String[] argv) throws Exception {
    String driverName = "com.jnetdirect.jsql.JSQLDriver";
    Class.forName(driverName);
    String serverName = "127.0.0.1";
    String portNumber = "1433";
    String mydatabase = serverName + ":" + portNumber;
    String url = "jdbc:JSQLConnect://" + mydatabase;
    String username = "username";
    String password = "password";
    Connection connection = DriverManager.getConnection(url, username, password);
    DatabaseMetaData dbmd = connection.getMetaData();
    String[] types = { "TABLE" };
    ResultSet resultSet = dbmd.getTables(null, null, "%", types);
    while (resultSet.next()) {
      String tableName = resultSet.getString(3);
      String tableCatalog = resultSet.getString(1);
      String tableSchema = resultSet.getString(2);
    }
  }
}





Get all table schemas

import java.sql.Connection;
import java.sql.DatabaseMetaData;
import java.sql.DriverManager;
import java.sql.ResultSet;
public class Main {
  public static void main(String[] argv) throws Exception {
    String driverName = "com.jnetdirect.jsql.JSQLDriver";
    Class.forName(driverName);
    String serverName = "127.0.0.1";
    String portNumber = "1433";
    String mydatabase = serverName + ":" + portNumber;
    String url = "jdbc:JSQLConnect://" + mydatabase;
    String username = "username";
    String password = "password";
    Connection connection = DriverManager.getConnection(url, username, password);
    DatabaseMetaData dbmd = connection.getMetaData();
    String[] types = { "TABLE" };
    ResultSet resultSet = dbmd.getTables(null, null, "%", types);
    while (resultSet.next()) {
      String tableName = resultSet.getString(3);
      String tableCatalog = resultSet.getString(1);
      String tableSchema = resultSet.getString(2);
    }
  }
}





Getting the Number of Rows in a Table Using a Scrollable Result Set

import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.Statement;
public class Main {
  public static void main(String[] argv) throws Exception {
    String driverName = "com.jnetdirect.jsql.JSQLDriver";
    Class.forName(driverName);
    String serverName = "127.0.0.1";
    String portNumber = "1433";
    String mydatabase = serverName + ":" + portNumber;
    String url = "jdbc:JSQLConnect://" + mydatabase;
    String username = "username";
    String password = "password";
    Connection connection = DriverManager.getConnection(url, username, password);
    // Create a scrollable result set
    Statement stmt = connection.createStatement(ResultSet.TYPE_SCROLL_INSENSITIVE,
        ResultSet.CONCUR_READ_ONLY);
    ResultSet resultSet = stmt.executeQuery("SELECT * FROM my_table");
    // Move to the end of the result set
    resultSet.last();
    // Get the row number of the last row which is also the row count
    int rowCount = resultSet.getRow();
  }
}





Load driver for SQL Server

import java.sql.CallableStatement;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.ResultSet;
public class Main {
  public static void main(String[] argv) throws Exception {
    Class.forName("com.microsoft.sqlserver.jdbc.SQLServerDriver");
    Connection con = DriverManager.getConnection("jdbc:sqlserver://MYSERVER;databaseName=MYDATABASE",
        "USERID", "PASSWORD");
    CallableStatement proc_stmt = con.prepareCall("{ call generateID(?) }");
    proc_stmt.setString(1, "employee");
    ResultSet rs = proc_stmt.executeQuery();
    if (rs.next()) {
      int employeeId = rs.getInt(1);
      System.out.println("Generated employeeId: " + employeeId);
    } else {
      System.out.println("Stored procedure couldn"t generate new Id");
    }
  }
}





Updating a Row in a Database Table Using an Updatable Result Set

import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.Statement;
public class Main {
  public static void main(String[] argv) throws Exception {
    String driverName = "com.jnetdirect.jsql.JSQLDriver";
    Class.forName(driverName);
    String serverName = "127.0.0.1";
    String portNumber = "1433";
    String mydatabase = serverName + ":" + portNumber;
    String url = "jdbc:JSQLConnect://" + mydatabase;
    String username = "username";
    String password = "password";
    Connection connection = DriverManager.getConnection(url, username, password);
    Statement stmt = connection.createStatement(
        ResultSet.TYPE_SCROLL_SENSITIVE, ResultSet.CONCUR_UPDATABLE);
    ResultSet resultSet = stmt.executeQuery("SELECT * FROM my_table");
    resultSet.first();
    // Update the value of column col_string on that row
    resultSet.updateString("col_string", "new data");
    // Update the row; if auto-commit is enabled, update is committed
    resultSet.updateRow();
  }
}


Источник — «http://jexp.ru/index.php?title=Java_Tutorial/Database/SqlServer&oldid=4770»