Example usage for java.sql Connection close

List of usage examples for java.sql Connection close

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:Main.java

public static void main(String[] argv) throws Exception {
    Class.forName("com.mysql.jdbc.Driver");
    Connection con = DriverManager.getConnection("jdbc:mysql://localhost:3306/jdbctutorial", "root", "root");
    con.setAutoCommit(false);/*from  www . j a v  a 2 s  . c o  m*/
    String sql = "INSERT product VALUES(?,?)";
    PreparedStatement prest = con.prepareStatement(sql);
    prest.setString(1, "A");
    prest.setInt(2, 2002);
    prest.addBatch();
    prest.setString(1, "B");
    prest.setInt(2, 1998);
    prest.addBatch();
    prest.setString(1, "C");
    prest.setInt(2, 1980);
    prest.addBatch();
    prest.setString(1, "D");
    prest.setInt(2, 1975);
    prest.addBatch();
    int count[] = prest.executeBatch();
    con.commit();
    con.close();
}

From source file:DemoPreparedStatementSetBigDecimal.java

public static void main(String[] args) throws Exception {
    Connection conn = null;
    PreparedStatement pstmt = null;
    String query = null;/*from   ww w .j av a2 s . com*/
    try {
        conn = getConnection();
        query = "insert into  BIG_DECIMAL_TABLE(id, big_decimal) values(?, ?)";
        pstmt = conn.prepareStatement(query);
        pstmt.setString(1, "001");
        pstmt.setBigDecimal(2, new java.math.BigDecimal("123456789"));
        // execute query, and return number of rows created
        int rowCount = pstmt.executeUpdate();
        System.out.println("rowCount=" + rowCount);
    } catch (Exception e) {
        e.printStackTrace();
    } finally {
        pstmt.close();
        conn.close();
    }
}

From source file:Main.java

public static void main(String[] args) throws Exception {

    Connection conn = getConnection();

    conn.setAutoCommit(false);//ww w  .jav  a  2s .com
    Statement st = conn.createStatement();

    st.setFetchSize(1);

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

    rs.setFetchSize(1);

    outputResultSet(rs);

    checkForWarning(rs.getWarnings());

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

}

From source file:Main.java

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

    st.executeUpdate("create table survey (id int, myDate TIMESTAMP );");

    String INSERT_RECORD = "insert into survey(id) values(?)";

    PreparedStatement pstmt = conn.prepareStatement(INSERT_RECORD);
    pstmt.setString(1, "1");
    pstmt.executeUpdate();/*from w  w w.j  a  v  a  2s.c  om*/

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

    pstmt.setString(1, "2");
    pstmt.executeUpdate();

    rs = st.executeQuery("SELECT * FROM survey");
    outputResultSet(rs);

    rs.close();
    st.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 (pk_column int,name varchar(30));");
    st.executeUpdate("insert into survey (pk_column,name ) values (1,'nameValue')");
    st.executeUpdate("insert into survey (pk_column,name ) values (2,null)");
    st.executeUpdate("insert into survey (pk_column,name ) values (3,'Tom')");
    // Primary key pk_column must be specified
    // so that the result set is updatable
    ResultSet rs = st.executeQuery("SELECT pk_column FROM survey");

    rs.close();/*from w  w w . j a v  a 2 s  .com*/
    st.close();
    conn.close();
}

From source file:Main.java

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

    st.executeUpdate("create table survey (id int,name varchar(30));");
    st.executeUpdate("insert into survey (id,name ) values (10,'nameValue')");
    st.executeUpdate("insert into survey (id,name ) values (null,null)");
    st = conn.createStatement();//from  w  w w  . j  a  va 2 s  .  c om
    ResultSet rs = st.executeQuery("SELECT * FROM survey");

    while (rs.next()) {
        int id = rs.getInt(1);
        System.out.println(id);
        if (rs.wasNull()) {
            id = -1;
        }
        System.out.println(id);
    }
    rs.close();
    st.close();
    conn.close();
}

From source file:Main.java

public static void main(String[] args) throws Exception {
    Connection conn = getConnection();
    conn.setAutoCommit(false);//from ww w  .  j av  a 2 s  . c  om
    Statement stmt = conn.createStatement();

    stmt.executeUpdate("create table survey (id int, name CHAR(5) );");

    stmt.executeUpdate("INSERT INTO survey(id, name)VALUES(111, '123456789')");

    displayError(stmt.getWarnings());
    // try to write more data for the name column.
    displayError(stmt.getWarnings());

    // since there were no errors, commit
    conn.commit();

    ResultSet rs = stmt.executeQuery("SELECT * FROM survey");
    outputResultSet(rs);

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

From source file:Main.java

public static void main(String[] args) throws Exception {
    try {/* w  w  w  . ja  v a 2  s  .  c om*/
        Connection conn = getConnection();
        Statement st = conn.createStatement();

        st.executeUpdate("create table survey (id int,myDate DATE );");
        String INSERT_RECORD = "insert into survey(id, myDate) values(?, ?)";

        PreparedStatement pstmt = conn.prepareStatement(INSERT_RECORD);
        pstmt.setString(1, "1");
        java.sql.Date sqlDate = new java.sql.Date(new java.util.Date().getTime());
        pstmt.setDate(2, sqlDate);

        pstmt.executeUpdate();

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

        rs.close();
        st.close();
        conn.close();
    } catch (SQLException e) {
        while (e != null) {
            String errorMessage = e.getMessage();
            System.err.println("sql error message:" + errorMessage);

            // This vendor-independent string contains a code.
            String sqlState = e.getSQLState();
            System.err.println("sql state:" + sqlState);

            int errorCode = e.getErrorCode();
            System.err.println("error code:" + errorCode);
            // String driverName = conn.getMetaData().getDriverName();
            // System.err.println("driver name:"+driverName);
            // processDetailError(drivername, errorCode);
            e = e.getNextException();
        }

    }
}

From source file:Main.java

public static void main(String[] args) throws Exception {
    Connection conn = getMySqlConnection();
    System.out.println("Got Connection.");
    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')");

    ResultSet catalogs = null;/*from w w w  .j a va  2  s.c  o  m*/
    DatabaseMetaData meta = conn.getMetaData();
    catalogs = meta.getCatalogs();

    while (catalogs.next()) {
        String catalog = catalogs.getString(1); //"TABLE_CATALOG"
        System.out.println("catalog: " + catalog);
    }

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

From source file:Main.java

public static void main(String[] args) throws Exception {
    Connection conn = getMySqlConnection();
    System.out.println("Got Connection.");
    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   w  w  w  .j a  v  a 2 s.  c  om
    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();
}