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:Main.java

public static void main(String[] args) throws Exception {
    Connection con = DriverManager.getConnection("jdbc:h2:mem:");
    Statement s = con.createStatement();
    s.execute("CREATE TABLE Table1 (Column1 CLOB)");

    InputStream is = new FileInputStream("data.txt");
    Reader rdr = new InputStreamReader(is, StandardCharsets.ISO_8859_1);
    PreparedStatement ps = con.prepareStatement("INSERT INTO Table1 (Column1) VALUES (?)");
    ps.setCharacterStream(1, rdr);//w ww . j  a  v a  2s .co  m
    ps.executeUpdate();

    ResultSet rs = s.executeQuery("SELECT Column1 FROM Table1");
    int rowNumber = 0;
    while (rs.next()) {
        String str = rs.getString("Column1");
        System.out.println(String.format("Row %d: CLOB is %d character(s) long.", ++rowNumber, str.length()));
    }
    rs.close();
    con.close();
}

From source file:MainClass.java

public static void main(String[] args) {
    Connection connection = null;
    Statement statement = null;/*  w w w . j  a  v a 2  s  .  co m*/
    try {
        Class.forName("org.gjt.mm.mysql.Driver").newInstance();
        String url = "jdbc:mysql://localhost/mysql";
        connection = DriverManager.getConnection(url, "username", "password");
        statement = connection.createStatement();
        String hrappSQL = "CREATE DATABASE hrapp";
        statement.executeUpdate(hrappSQL);
    } catch (Exception e) {
        e.printStackTrace();
    } finally {
        if (statement != null) {
            try {
                statement.close();
            } catch (SQLException e) {
            }
        }
        if (connection != null) {
            try {
                connection.close();
            } catch (SQLException e) {
            }
        }
    }
}

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);

    // create some binary data
    String myData = "some string data ...";
    byte[] binaryData = myData.getBytes();

    // set value for the prepared statement
    pstmt.setBytes(1, binaryData);/*www .jav a2  s .c  o m*/

    // insert the data
    pstmt.executeUpdate();

    ResultSet rs = stmt.executeQuery("SELECT * FROM survey");
    while (rs.next()) {
        System.out.print(new String(rs.getBytes(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);

    // create some binary data
    String myData = "some string data ...";
    byte[] binaryData = myData.getBytes();

    // set value for the prepared statement
    pstmt.setBytes(1, binaryData);/*from  ww w .j  a  va 2 s .c  o  m*/

    // insert the data
    pstmt.executeUpdate();

    ResultSet rs = stmt.executeQuery("SELECT * FROM survey");
    while (rs.next()) {
        System.out.print(rs.getBytes(2).length + "   ");
    }

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

From source file:DemoDataTruncation.java

public static void main(String[] args) throws Exception {
    Connection conn = getMySQLConnection();
    Statement stmt = null;/*w ww.  j av  a2  s.c  o m*/
    try {
        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();
    }
}

From source file:Main.java

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

    DatabaseMetaData mtdt = conn.getMetaData();

    System.out.println(mtdt.getProcedureTerm());

    ResultSet rs = mtdt.getProcedures(conn.getCatalog(), "%", "%");

    ResultSetMetaData rsmd = rs.getMetaData();
    int numCols = rsmd.getColumnCount();
    for (int i = 1; i <= numCols; i++) {
        if (i > 1)
            System.out.print(", ");
        System.out.print(rsmd.getColumnLabel(i));
    }//from  www  .  j  av  a2 s.  com
    System.out.println("");
    while (rs.next()) {
        for (int i = 1; i <= numCols; i++) {
            if (i > 1)
                System.out.print(", ");
            System.out.print(rs.getString(i));
        }
        System.out.println("");
    }
    conn.close();
}

From source file:Main.java

public static void main(String[] argv) throws Exception {
    Connection dbConnection = null;
    PreparedStatement preparedStatement = null;
    Class.forName(DB_DRIVER);//w  w w  . ja va 2s. c o m
    dbConnection = DriverManager.getConnection(DB_CONNECTION, DB_USER, DB_PASSWORD);

    String insertTableSQL = "INSERT INTO Person" + "(USER_ID, USERNAME, CREATED_BY, CREATED_DATE) VALUES"
            + "(?,?,?,?)";

    preparedStatement = dbConnection.prepareStatement(insertTableSQL);

    preparedStatement.setInt(1, 11);
    preparedStatement.setString(2, "yourName");
    preparedStatement.setString(3, "system");
    java.util.Date today = new java.util.Date();

    preparedStatement.setTimestamp(4, new java.sql.Timestamp(today.getTime()));

    preparedStatement.executeUpdate();

    preparedStatement.close();
    dbConnection.close();

}

From source file:Main.java

public static void main(String[] args) throws Exception {
    Connection conn = null;
    PreparedStatement pstmt = null;
    java.sql.Array sqlArray = null;
    conn = getOracleConnection();//w  w  w .  j a v a  2s  .  c  om
    //  ArrayDescriptor arrayDescriptor = ArrayDescriptor.createDescriptor("CHAR_ARRAY", conn);
    String[] content = { "v1", "v2", "v3", "v4" };
    // sqlArray = new oracle.sql.ARRAY(arrayDescriptor, conn, content);

    String query = "insert into CHAR_ARRAY_TABLE(id, array) values(?, ?)";

    pstmt = conn.prepareStatement(query);
    pstmt.setString(1, "0001");
    pstmt.setArray(2, sqlArray);

    int rowCount = pstmt.executeUpdate();
    System.out.println("rowCount=" + rowCount);
    System.out.println("--Demo_PreparedStatement_SetArray end--");
    pstmt.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_READ_ONLY);

    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 * FROM survey");

    // Move cursor to the beginning, before the first row.
    // cursor position is 0.
    rs.beforeFirst();/*  www. j av a 2  s  .c o m*/
    rs.next();
    // Get data at cursor
    String id = rs.getString("id");
    System.out.println(id);

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

From source file:SerializeJavaObjects_MySQL.java

public static void main(String args[]) throws Exception {
    Connection conn = null;
    try {//w  w w .j av  a 2s  . c  om
        conn = getConnection();
        System.out.println("conn=" + conn);
        conn.setAutoCommit(false);
        List<Object> list = new ArrayList<Object>();
        list.add("This is a short string.");
        list.add(new Integer(1234));
        list.add(new Date());

        long objectID = writeJavaObject(conn, list);
        conn.commit();
        System.out.println("Serialized objectID => " + objectID);
        List listFromDatabase = (List) readJavaObject(conn, objectID);
        System.out.println("[After De-Serialization] list=" + listFromDatabase);
    } catch (Exception e) {
        e.printStackTrace();
    } finally {
        conn.close();
    }
}