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 {
    try {/*from w ww  .  ja v  a2s . c om*/
        String url = "jdbc:odbc:databaseName";
        String driver = "sun.jdbc.odbc.JdbcOdbcDriver";
        String user = "guest";
        String password = "guest";
        Class.forName(driver);
        Connection connection = DriverManager.getConnection(url, user, password);
        String changeLastName = "UPDATE authors SET lastname = ? WHERE authid = ?";
        PreparedStatement updateLastName = connection.prepareStatement(changeLastName);

        updateLastName.setString(1, "Martin"); // Set lastname placeholder value
        updateLastName.setInt(2, 4); // Set author ID placeholder value

        int rowsUpdated = updateLastName.executeUpdate(); // execute the update
        System.out.println("Rows affected: " + rowsUpdated);
        connection.close();
    } catch (ClassNotFoundException cnfe) {
        System.err.println(cnfe);
    } catch (SQLException sqle) {
        System.err.println(sqle);
    }
}

From source file:Main.java

public static void main(String[] args) throws Exception {
    byte[] data = new byte[SIZE];
    for (int i = 0; i < SIZE; ++i) {
        data[i] = (byte) (64 + (i % 32));
    }/*  w  ww .j  a  v a 2s.com*/
    ByteArrayInputStream stream = new ByteArrayInputStream(data);
    // DriverManager.registerDriver(new OracleDriver());
    Connection c = DriverManager.getConnection("jdbc:oracle:thin:@some_database", "user", "password");

    String sql = "DECLARE\n" + //
            "  l_line    CLOB;\n" + //
            "BEGIN\n" + //
            "  l_line := ?;\n" + //
            "  UPDATE table SET log = log || l_line || CHR(10) WHERE id = ?;\n" + //
            "END;\n"; //

    PreparedStatement stmt = c.prepareStatement(sql);
    stmt.setAsciiStream(1, stream, SIZE);
    stmt.setInt(2, 1);
    stmt.execute();
    stmt.close();
    c.commit();
    c.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 CHAR(5) );");

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

    ResultSet rs = stmt.executeQuery("SELECT * FROM survey");
    outputResultSet(rs);//from  w w  w .j  a  v a2s  .  c  o m

    stmt.executeUpdate("update survey set name='newName' where id = 111");

    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 {

    Connection con = null;
    Class.forName("org.apache.cassandra.cql.jdbc.CassandraDriver");
    con = DriverManager.getConnection("jdbc:cassandra://localhost:9160/Keyspace");

    String query = "SELECT * FROM column_family where gender=f ";

    Statement stmt = con.createStatement();
    ResultSet result = stmt.executeQuery(query);

    while (result.next()) {
        System.out.println(result.getString("user_name"));
        System.out.println(result.getString("gender"));
        System.out.println(result.getString("password"));
    }// w w w  .j  av a2  s . c o m
    con.close();
}

From source file:TestRegisterDriverApp.java

public static void main(String args[]) {

    try {/*from w  w  w  . ja va2s.  c  o  m*/
        DriverManager.registerDriver(new oracle.jdbc.driver.OracleDriver());
    } catch (SQLException e) {
        System.out.println("Oops! Got a SQL error: " + e.getMessage());
        System.exit(1);
    }

    Connection conn = null;
    Statement stmt = null;
    ResultSet rset = null;
    try {
        conn = DriverManager.getConnection("jdbc:oracle:thin:@dssw2k01:1521:orcl", "scott", "tiger");

        stmt = conn.createStatement();
        rset = stmt.executeQuery("select 'Hello '||USER||'!' result from dual");
        while (rset.next())
            System.out.println(rset.getString(1));
        rset.close();
        rset = null;
        stmt.close();
        stmt = null;
        conn.close();
        conn = null;
    } catch (SQLException e) {
        System.out.println("Darn! A SQL error: " + e.getMessage());
    } finally {
        if (rset != null)
            try {
                rset.close();
            } catch (SQLException ignore) {
            }
        if (stmt != null)
            try {
                stmt.close();
            } catch (SQLException ignore) {
            }
        if (conn != null)
            try {
                conn.close();
            } catch (SQLException ignore) {
            }
    }
}

From source file:TestClassForNameApp.java

public static void main(String args[]) {

    try {/*from w  ww  .  ja va  2s .c o  m*/
        Class.forName("oracle.jdbc.driver.OracleDriver");
    } catch (ClassNotFoundException e) {
        System.out.println("Oops! Can't find class oracle.jdbc.driver.OracleDriver");
        System.exit(1);
    }

    Connection conn = null;
    Statement stmt = null;
    ResultSet rset = null;
    try {
        conn = DriverManager.getConnection("jdbc:oracle:thin:@dssw2k01:1521:orcl", "scott", "tiger");

        stmt = conn.createStatement();
        rset = stmt.executeQuery("select 'Hello '||USER||'!' result from dual");
        while (rset.next())
            System.out.println(rset.getString(1));
        rset.close();
        rset = null;
        stmt.close();
        stmt = null;
        conn.close();
        conn = null;
    } catch (SQLException e) {
        System.out.println("Darn! A SQL error: " + e.getMessage());
    } finally {
        if (rset != null)
            try {
                rset.close();
            } catch (SQLException ignore) {
            }
        if (stmt != null)
            try {
                stmt.close();
            } catch (SQLException ignore) {
            }
        if (conn != null)
            try {
                conn.close();
            } catch (SQLException ignore) {
            }
    }
}

From source file:Main.java

public static void main(String[] args) throws Exception {
    Class.forName("oracle.jdbc.driver.OracleDriver");
    Connection conn = DriverManager.getConnection(url, username, password);
    conn.setAutoCommit(false);/*from w ww .j a v a2s  .c om*/

    String sql = "INSERT INTO pictures (name, description, image) VALUES (?, ?, ?)";
    PreparedStatement stmt = conn.prepareStatement(sql);
    stmt.setString(1, "java.gif");
    stmt.setString(2, "Java Official Logo");

    File image = new File("D:\\a.gif");
    FileInputStream fis = new FileInputStream(image);
    stmt.setBinaryStream(3, fis, (int) image.length());
    stmt.execute();

    conn.commit();
    fis.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("URL in use: " + mtdt.getURL());
    System.out.println("User name: " + mtdt.getUserName());
    System.out.println("DBMS name: " + mtdt.getDatabaseProductName());
    System.out.println("DBMS version: " + mtdt.getDatabaseProductVersion());
    System.out.println("Driver name: " + mtdt.getDriverName());
    System.out.println("Driver version: " + mtdt.getDriverVersion());
    System.out.println("supp. SQL Keywords: " + mtdt.getSQLKeywords());

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

    PreparedStatement pstmt = conn.prepareStatement(INSERT_RECORD);
    pstmt.setString(1, "1");
    pstmt.setNull(2, java.sql.Types.DATE);

    pstmt.executeUpdate();//from w w w.  j a  v  a2s  .co  m

    ResultSet 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 = getHSQLConnection();
    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();/*  ww  w .  j a  v a  2s  . c o m*/
    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();
}