Example usage for java.sql ResultSet getString

List of usage examples for java.sql ResultSet getString

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Introduction

In this page you can find the example usage for java.sql ResultSet getString.

Prototype

String getString(String columnLabel) throws SQLException;

Source Link

Document

Retrieves the value of the designated column in the current row of this ResultSet object as a String in the Java programming language.

Usage

From source file:Main.java

public static void main(String[] args) throws Exception {
    String hostname = "", dbname = "", username = "", password = "";
    Class.forName("org.postgresql.Driver");
    Connection connection = DriverManager.getConnection("jdbc:postgresql://" + hostname + "/" + dbname,
            username, password);// www.ja  va  2 s  . c  o m
    ResultSet rs = connection.createStatement().executeQuery("select version() as version");
    while (rs.next()) {
        System.out.println(rs.getString("version"));
    }
}

From source file:com.alibaba.cobar.manager.test.ConnectionTest.java

/**
 * @param args/*from   ww w.j a va2 s  . c  o  m*/
 */
public static void main(String[] args) {
    try {
        BasicDataSource ds = new BasicDataSource();
        ds.setUsername("test");
        ds.setPassword("");
        ds.setUrl("jdbc:mysql://10.20.153.178:9066/");
        ds.setDriverClassName("com.mysql.jdbc.Driver");
        ds.setMaxActive(-1);
        ds.setMinIdle(0);
        ds.setTimeBetweenEvictionRunsMillis(600000);
        ds.setNumTestsPerEvictionRun(Integer.MAX_VALUE);
        ds.setMinEvictableIdleTimeMillis(GenericObjectPool.DEFAULT_MIN_EVICTABLE_IDLE_TIME_MILLIS);
        Connection conn = ds.getConnection();

        Statement stm = conn.createStatement();
        stm.execute("show @@version");

        ResultSet rst = stm.getResultSet();
        rst.next();
        String version = rst.getString("VERSION");

        System.out.println(version);

    } catch (Exception exception) {
        System.out.println("10.20.153.178:9066   " + exception.getMessage() + exception);
    }
}

From source file:Main.java

public static void main(String[] args) throws Exception {
    Connection conn = getConnection();
    Statement st = conn.createStatement(ResultSet.TYPE_SCROLL_INSENSITIVE, 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')");
    st = conn.createStatement();/*w  w  w . j a v  a 2 s . c  o  m*/
    ResultSet rs = st.executeQuery("SELECT * FROM survey");

    while (rs.next()) {
        String name = rs.getString(2);
        if (rs.wasNull()) {
            System.out.println("was NULL");
        } else {
            System.out.println("not NULL");
        }
    }

    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, id2 tinyint, id3 smallint, id4 bigint, id5 real);");
    String sql = "INSERT INTO survey (id2,id3,id4,id5) VALUES(?,?,?,?)";
    PreparedStatement pstmt = conn.prepareStatement(sql);
    byte b = 1;//from   ww w  .  j  ava 2  s. c  o m
    short s = 2;
    pstmt.setByte(1, b);
    pstmt.setShort(2, s);
    pstmt.setInt(3, 3);
    pstmt.setLong(4, 4L);
    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 {
    Class.forName(DRIVER);/* w w  w .  java2 s.  c  o  m*/
    Connection connection = DriverManager.getConnection(URL, USERNAME, PASSWORD);

    DatabaseMetaData metadata = connection.getMetaData();
    ResultSet resultSet = metadata.getColumns(null, null, "users", null);
    while (resultSet.next()) {
        String name = resultSet.getString("COLUMN_NAME");
        String type = resultSet.getString("TYPE_NAME");
        int size = resultSet.getInt("COLUMN_SIZE");

        System.out.println("Column name: [" + name + "]; type: [" + type + "]; size: [" + size + "]");
    }
    connection.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 DECIMAL, name BINARY );");

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

    pstmt.setBigDecimal(1, new BigDecimal("1.00000"));

    // insert the data
    pstmt.executeUpdate();// ww  w.  ja v a 2 s.c  o  m

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

    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;/*from   ww  w.ja v a  2 s  .  c  om*/
    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"));
    }
    statement.close();
    con.close();
}

From source file:Test.java

public static void main(String[] args) throws Exception {
    Connection con = DriverManager.getConnection("jdbc:derby://localhost:1527/contact", "userName", "password");
    DatabaseMetaData metaData = con.getMetaData();
    ResultSet resultSet = metaData.getPseudoColumns("", "schemaName", "tableName", "");

    while (resultSet.next()) {
        System.out.println(resultSet.getString("TABLE_SCHEM ") + " - " + resultSet.getString("COLUMN_NAME "));
    }/*w  ww .  j  a  va  2s.  c o  m*/

}

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 av a  2 s  .c o 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 {
    Class.forName("com.mysql.jdbc.Driver");
    Connection connection = DriverManager.getConnection("jdbc:mysql://localhost/testdb", "root", "");

    Statement statement = connection.createStatement(ResultSet.TYPE_SCROLL_INSENSITIVE,
            ResultSet.CONCUR_READ_ONLY);
    ResultSet resultSet = statement.executeQuery("SELECT * FROM products");
    while (resultSet.next()) {
        String productCode = resultSet.getString("product_code");

        int row = resultSet.getRow();

        System.out.println(row + ". " + productCode);
    }//from   www.  j  av a 2 s .c o m
    connection.close();
}