Example usage for java.sql Connection close

List of usage examples for java.sql Connection close

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Introduction

In this page you can find the example usage for java.sql Connection close.

Prototype

void close() throws SQLException;

Source Link

Document

Releases this Connection object's database and JDBC resources immediately instead of waiting for them to be automatically released.

Usage

From source file:CheckJDBCInstallation.java

public static void main(String[] args) {
    Connection conn = null;
    try {/* w w w.  jav a2s  .  c  o m*/
        String dbVendor = args[0];
        // get connection to a database
        System.out.println("dbVendor=" + dbVendor);
        System.out.println("conn=" + conn);
        System.out.println("valid connection = " + isValidConnection(conn, dbVendor));
    } catch (Exception e) {
        // handle the exception
        e.printStackTrace();
        System.exit(1);
    } finally {
        // release database resources
        try {
            conn.close();
        } catch (SQLException e) {
            e.printStackTrace();
        }
    }
}

From source file:Main.java

public static void main(String[] args) throws Exception {
    Class.forName(DRIVER);/* w  w w  .  j  a v a 2s .  co m*/
    Connection connection = DriverManager.getConnection(URL, USERNAME, PASSWORD);

    DatabaseMetaData metadata = connection.getMetaData();
    String driverName = metadata.getDriverName();
    String driverVersion = metadata.getDriverVersion();
    int majorVersion = metadata.getDriverMajorVersion();
    int minorVersion = metadata.getDriverMinorVersion();

    System.out.println("driverName = " + driverName);
    System.out.println("driverVersion = " + driverVersion);
    System.out.println("majorVersion = " + majorVersion);
    System.out.println("minorVersion = " + minorVersion);
    connection.close();
}

From source file:Main.java

public static void main(String[] args) throws Exception {
    String id = "0001";
    float floatValue = 0001f;
    double doubleValue = 1.0001d;
    Connection conn = null;
    PreparedStatement pstmt = null;
    try {//from  w w w . java  2  s  .  co m
        conn = getConnection();
        String query = "insert into double_table(id, float_column, double_column) values(?, ?, ?)";
        pstmt = conn.prepareStatement(query);
        pstmt.setString(1, id);
        pstmt.setFloat(2, floatValue);
        pstmt.setDouble(3, doubleValue);
        // execute query, and return number of rows created
        int rowCount = pstmt.executeUpdate();
        System.out.println("rowCount=" + rowCount);
    } finally {
        pstmt.close();
        conn.close();
    }
}

From source file:Main.java

public static void main(String[] args) throws Exception {
    Connection conn = getHSQLConnection();
    Statement st = conn.createStatement();
    //    st.executeUpdate("drop table survey;");
    st.executeUpdate("create table survey (id int,name varchar(30));");
    st.executeUpdate("insert into survey (id,name ) values (1,'nameValue')");

    st = conn.createStatement();/*from  ww w . java2  s  . co m*/
    ResultSet rs = st.executeQuery("SELECT * FROM survey");

    ResultSetMetaData rsMetaData = rs.getMetaData();

    int numberOfColumns = rsMetaData.getColumnCount();
    System.out.println("resultSet MetaData column Count=" + numberOfColumns);

    st.close();
    conn.close();
}

From source file:Main.java

public static void main(String[] args) throws Exception {
    Connection conn = getHSQLConnection();

    conn.setAutoCommit(true);/* w  ww  .ja  v  a 2s .c om*/

    Statement st = conn.createStatement();
    st.executeUpdate("create table survey (id int,name varchar(30));");
    st.executeUpdate("insert into survey (id,name ) values (1,'nameValue')");

    st = conn.createStatement();
    ResultSet rs = st.executeQuery("SELECT * FROM survey");

    ResultSetMetaData rsMetaData = rs.getMetaData();

    int numberOfColumns = rsMetaData.getColumnCount();
    System.out.println("resultSet MetaData column Count=" + numberOfColumns);

    rs.close();
    st.close();
    conn.close();
}

From source file:Main.java

public static void main(String[] args) throws Exception {
    Connection conn = getConnection();
    Statement stmt = conn.createStatement();

    stmt.executeUpdate("create table survey (id int, register int );");

    String sql = "INSERT INTO survey (register) VALUES(?)";
    PreparedStatement pstmt = conn.prepareStatement(sql);

    pstmt.setBoolean(1, true);//from   w w w.  ja  v  a  2 s. co  m
    pstmt.executeUpdate();

    pstmt.setBoolean(1, false);
    pstmt.executeUpdate();

    ResultSet rs = stmt.executeQuery("SELECT * FROM survey");
    while (rs.next()) {
        System.out.println(rs.getString(2));
    }
    rs.close();
    stmt.close();
    conn.close();
}

From source file:Main.java

public static void main(String[] args) throws Exception {
    String db_file_name_prefix = "c:\\mydbdir\\mydb";

    Connection con = null;
    Class.forName("org.hsqldb.jdbcDriver");

    con = DriverManager.getConnection("jdbc:hsqldb:file:" + db_file_name_prefix, // filenames
            "sa", // username
            ""); // password

    Statement statement = con.createStatement();
    ResultSet rs = statement.executeQuery("SELECT * FROM \"User\"");
    while (rs.next()) {
        System.out.print("ID: " + rs.getString("ID"));
        System.out.print(" first name: " + rs.getString("firstname"));
        System.out.println(" last name: " + rs.getString("lastname"));
    }/*from w  ww .jav a 2s.com*/
    statement.close();
    con.close();
}

From source file:Main.java

public static void main(String[] args) throws Exception {
    Connection conn = getConnection();
    Statement stmt = conn.createStatement();

    stmt.executeUpdate("create table survey (id int, register int );");

    String sql = "INSERT INTO survey (register) VALUES(?)";
    PreparedStatement pstmt = conn.prepareStatement(sql);

    pstmt.setBoolean(1, true);//from   w  w w.j a  v a 2  s  .c  om
    pstmt.executeUpdate();

    pstmt.setBoolean(1, false);
    pstmt.executeUpdate();

    ResultSet rs = stmt.executeQuery("SELECT * FROM survey");
    while (rs.next()) {
        System.out.println(rs.getString(2));
    }

    rs.close();
    stmt.close();
    conn.close();
}

From source file:Main.java

public static void main(String[] args) throws Exception {
    Connection conn = getConnection();
    Statement stmt = conn.createStatement();
    stmt.executeUpdate("create table survey (id int, name BINARY );");
    String sql = "INSERT INTO survey (name) VALUES(?)";
    PreparedStatement pstmt = conn.prepareStatement(sql);
    String myData = "some string data ...";
    byte[] binaryData = myData.getBytes();
    pstmt.setBytes(1, binaryData);// ww  w .  j  a va 2s .  c om
    pstmt.executeUpdate();

    ResultSet rs = stmt.executeQuery("SELECT * FROM survey");
    while (rs.next()) {
        System.out.print(rs.getByte(1));
    }
    rs.close();
    stmt.close();
    conn.close();
}

From source file:Main.java

public static void main(String[] args) throws Exception {
    Connection conn = getConnection();
    Statement st = conn.createStatement(ResultSet.TYPE_SCROLL_SENSITIVE, ResultSet.CONCUR_UPDATABLE);

    st.executeUpdate("create table survey (id int,name varchar(30));");
    st.executeUpdate("insert into survey (id,name ) values (1,'nameValue')");
    st.executeUpdate("insert into survey (id,name ) values (2,null)");
    st.executeUpdate("insert into survey (id,name ) values (3,'Tom')");

    ResultSet rs = st.executeQuery("SELECT id,name FROM survey");

    // Delete the first row
    rs.first();//from   ww  w . j  a va 2 s. co  m
    rs.deleteRow();

    rs.close();
    st.close();
    conn.close();
}