Get ResultSet Metadata
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.ResultSetMetaData;
import java.sql.Statement;
public class Main {
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();
ResultSet rs = st.executeQuery("SELECT * FROM survey");
ResultSetMetaData rsMetaData = rs.getMetaData();
int numberOfColumns = rsMetaData.getColumnCount();
System.out.println("resultSet MetaData column Count=" + numberOfColumns);
for (int i = 1; i <= numberOfColumns; i++) {
System.out.println("column MetaData ");
System.out.println("column number " + i);
// indicates the designated column's normal maximum width in
// characters
System.out.println(rsMetaData.getColumnDisplaySize(i));
// gets the designated column's suggested title
// for use in printouts and displays.
System.out.println(rsMetaData.getColumnLabel(i));
// get the designated column's name.
System.out.println(rsMetaData.getColumnName(i));
// get the designated column's SQL type.
System.out.println(rsMetaData.getColumnType(i));
// get the designated column's SQL type name.
System.out.println(rsMetaData.getColumnTypeName(i));
// get the designated column's class name.
System.out.println(rsMetaData.getColumnClassName(i));
// get the designated column's table name.
System.out.println(rsMetaData.getTableName(i));
// get the designated column's number of decimal digits.
System.out.println(rsMetaData.getPrecision(i));
// gets the designated column's number of
// digits to right of the decimal point.
System.out.println(rsMetaData.getScale(i));
// indicates whether the designated column is
// automatically numbered, thus read-only.
System.out.println(rsMetaData.isAutoIncrement(i));
// indicates whether the designated column is a cash value.
System.out.println(rsMetaData.isCurrency(i));
// indicates whether a write on the designated
// column will succeed.
System.out.println(rsMetaData.isWritable(i));
// indicates whether a write on the designated
// column will definitely succeed.
System.out.println(rsMetaData.isDefinitelyWritable(i));
// indicates the nullability of values
// in the designated column.
System.out.println(rsMetaData.isNullable(i));
// Indicates whether the designated column
// is definitely not writable.
System.out.println(rsMetaData.isReadOnly(i));
// Indicates whether a column's case matters
// in the designated column.
System.out.println(rsMetaData.isCaseSensitive(i));
// Indicates whether a column's case matters
// in the designated column.
System.out.println(rsMetaData.isSearchable(i));
// indicates whether values in the designated
// column are signed numbers.
System.out.println(rsMetaData.isSigned(i));
// Gets the designated column's table's catalog name.
System.out.println(rsMetaData.getCatalogName(i));
// Gets the designated column's table's schema name.
System.out.println(rsMetaData.getSchemaName(i));
}
st.close();
conn.close();
}
private static Connection getHSQLConnection() throws Exception {
Class.forName("org.hsqldb.jdbcDriver");
System.out.println("Driver Loaded.");
String url = "jdbc:hsqldb:data/tutorial";
return DriverManager.getConnection(url, "sa", "");
}
public static Connection getMySqlConnection() throws Exception {
String driver = "org.gjt.mm.mysql.Driver";
String url = "jdbc:mysql://localhost/demo2s";
String username = "oost";
String password = "oost";
Class.forName(driver);
Connection conn = DriverManager.getConnection(url, username, password);
return conn;
}
public static Connection getOracleConnection() throws Exception {
String driver = "oracle.jdbc.driver.OracleDriver";
String url = "jdbc:oracle:thin:@localhost:1521:caspian";
String username = "mp";
String password = "mp2";
Class.forName(driver); // load Oracle driver
Connection conn = DriverManager.getConnection(url, username, password);
return conn;
}
}
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