Example usage for java.sql Statement close

List of usage examples for java.sql Statement close

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Introduction

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

Prototype

void close() throws SQLException;

Source Link

Document

Releases this Statement object's database and JDBC resources immediately instead of waiting for this to happen when it is automatically closed.

Usage

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 (1,'nameValue')");
    st.executeUpdate("insert into survey (id,name ) values (2,null)");
    st.executeUpdate("insert into survey (id,name ) values (3,'Tom')");
    st = conn.createStatement();/* w w  w. j  a  va 2 s .co m*/
    ResultSet rs = st.executeQuery("SELECT * FROM survey");

    rs = st.executeQuery("SELECT COUNT(*) FROM survey");
    // get the number of rows from the result set
    rs.next();
    int rowCount = rs.getInt(1);
    System.out.println(rowCount);

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

}

From source file:GetColumnNamesFromResultSet_Oracle.java

public static void main(String[] args) {
    Connection conn = null;/*from   w  ww  .j a va 2s .c  o  m*/
    Statement stmt = null;
    ResultSet rs = null;
    try {
        conn = getConnection();
        // prepare query
        String query = "select id, name, age from employees";
        // create a statement
        stmt = conn.createStatement();
        // execute query and return result as a ResultSet
        rs = stmt.executeQuery(query);
        // get the column names from the ResultSet
        getColumnNames(rs);
    } catch (Exception e) {
        e.printStackTrace();
    } finally {
        // release database resources
        try {
            rs.close();
            stmt.close();
            conn.close();
        } catch (SQLException e) {
            e.printStackTrace();
        }
    }
}

From source file:Main.java

public static void main(String[] args) throws SQLException {
    // DriverManager.registerDriver(new oracle.jdbc.driver.OracleDriver());
    Connection conn = DriverManager.getConnection("jdbc:oracle:oci8:@yourDB", "scott", "tiger");

    Statement stmt = conn.createStatement(ResultSet.TYPE_SCROLL_SENSITIVE, ResultSet.CONCUR_UPDATABLE);

    stmt.setFetchSize(1);//from w  w w  . ja va  2s.com
    ResultSet rset = stmt.executeQuery("select EMPNO, ENAME, SAL from EMP");
    showProperty(rset);

    while (rset.next()) {
        System.out.println(rset.getInt(1) + " " + rset.getString(2) + " " + rset.getInt(3));
    }
    doSomeChanges(conn);
    // Place the cursor before the first row
    rset.beforeFirst();

    while (rset.next()) {
        System.out.println(rset.getInt(1) + " " + rset.getString(2) + " " + rset.getInt(3));
    }
    rset.close();
    stmt.close();
    cleanup(conn);
    conn.close();
}

From source file:Main.java

public static void main(String[] args) throws Exception {
    Connection conn = getMySQLConnection();
    Statement stmt = null;
    try {/*from w ww.j  a va  2s. com*/
        stmt = conn.createStatement();
        stmt.executeUpdate("DELETE FROM Mytable");
        displayError(stmt.getWarnings());
        stmt.executeUpdate(
                "INSERT INTO Mytable(id, name)" + "VALUES(1, 'NameLongerThanColumnLengthInDatabase')");
        displayError(stmt.getWarnings());
    } catch (DataTruncation dt) {
        displayError(dt);
        dt.printStackTrace();
    } catch (SQLException se) {
        System.out.println("Database error message: " + se.getMessage());
    } catch (Exception e) {
        e.printStackTrace();
    } finally {
        stmt.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) );");

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

    PreparedStatement pstmt = conn.prepareStatement(INSERT_RECORD);
    pstmt.setString(1, "1");
    pstmt.setString(2, "name1");
    pstmt.executeUpdate();//from   w  ww.ja  v  a2 s.  co m

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

    pstmt.setString(1, "2");
    pstmt.setString(2, "name2");
    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 {
    String url = "jdbc:odbc:technical_library";
    String driver = "sun.jdbc.odbc.JdbcOdbcDriver";
    String theStatement = "SELECT authid, lastname, firstname, email FROM authors ORDER BY authid";

    try {/*from  w w  w . j av  a2 s.  c om*/
        Class.forName(driver);
        Connection connection = DriverManager.getConnection(url, "guest", "guest");
        Statement queryAuthors = connection.createStatement();
        ResultSet results = queryAuthors.executeQuery(theStatement);

        String lastname, firstname, email;
        int id;
        while (results.next()) {
            id = results.getInt(1);
            lastname = results.getString(2);
            firstname = results.getString(3);
            email = results.getString(4);

            if (results.wasNull()) {
                email = "no email";
            }
            System.out.println(Integer.toString(id) + ", " + lastname.trim() + ", " + firstname.trim() + ", "
                    + email.trim());
        }
        queryAuthors.close();
    } catch (Exception e) {
        System.err.println(e);
    }
}

From source file:Main.java

public static void main(String[] args) throws Exception {
    Connection conn = null;/*from   w ww  .ja  va 2 s. c o m*/
    Statement stmt = null;

    Class.forName(JDBC_DRIVER);
    conn = DriverManager.getConnection(DB_URL, USER, PASS);
    System.out.println("Deleting database...");
    stmt = conn.createStatement();

    conn = DriverManager.getConnection(DB_URL, USER, PASS);

    stmt = conn.createStatement();

    String sql = "INSERT INTO Person VALUES (1, 'A', 'B', 18)";
    stmt.executeUpdate(sql);
    sql = "INSERT INTO Person VALUES (2, 'C', 'D', 25)";
    stmt.executeUpdate(sql);
    sql = "INSERT INTO Person VALUES (3, 'E', 'F', 30)";
    stmt.executeUpdate(sql);
    sql = "INSERT INTO Person VALUES(4, 'S', 'M', 28)";
    stmt.executeUpdate(sql);
    stmt.close();
    conn.close();
}

From source file:MainClass.java

public static void main(String args[]) {
    Connection conn = null;/*  ww  w .  jav a 2  s  . c o m*/
    Statement stmt = null;
    ResultSet rs = null;
    try {
        conn = getConnection();
        stmt = conn.createStatement();
        String query = "select EmployeeID, LastName, FirstName from Employees";
        rs = stmt.executeQuery(query);
        while (rs.next()) {
            System.out.println(rs.getString("EmployeeID") + " " + rs.getString("LastName") + " "
                    + rs.getString("FirstName"));
        }
    } catch (Exception e) {
        // handle the exception
        e.printStackTrace();
        System.err.println(e.getMessage());
    } finally {
        try {
            rs.close();
            stmt.close();
            conn.close();
        } catch (Exception ee) {
            ee.printStackTrace();
        }
    }
}

From source file:GetColumnNamesFromResultSet_MySQL.java

public static void main(String[] args) {
    Connection conn = null;/*  ww  w .j  a va 2 s  .co  m*/
    Statement stmt = null;
    ResultSet rs = null;
    try {
        conn = getConnection();
        // prepare query
        String query = "select id, name, age from employees";
        // create a statement
        stmt = conn.createStatement();
        // execute query and return result as a ResultSet
        rs = stmt.executeQuery(query);
        // get the column names from the ResultSet
        getColumnNames(rs);
    } catch (Exception e) {
        e.printStackTrace();
        System.exit(1);
    } finally {
        // release database resources
        try {
            rs.close();
            stmt.close();
            conn.close();
        } catch (SQLException e) {
            e.printStackTrace();
        }
    }
}

From source file:DemoDataTruncation.java

public static void main(String[] args) throws Exception {
    Connection conn = getMySQLConnection();
    Statement stmt = null;
    try {//from   w w w.ja va  2  s  .c o  m
        stmt = conn.createStatement();
        stmt.executeUpdate("DELETE FROM animals_table");
        displayError(stmt.getWarnings());
        stmt.executeUpdate(
                "INSERT INTO animals_table(id, name)" + "VALUES(1, 'NameLongerThanColumnLengthInDatabase')");
        displayError(stmt.getWarnings());
    } catch (DataTruncation dt) {
        displayError(dt);
        dt.printStackTrace();
    } catch (SQLException se) {
        System.out.println("Database error message: " + se.getMessage());
    } catch (Exception e) {
        e.printStackTrace();
    } finally {
        stmt.close();
        conn.close();
    }
}