Java Tutorial/Database/ParameterMetaData
Display Parameter information stored in the PreparedStatement
<source lang="java">
import java.sql.Connection; import java.sql.DriverManager; import java.sql.PreparedStatement; import java.sql.Statement; public class Main {
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");
java.sql.Date sqlDate = new java.sql.Date(new java.util.Date().getTime());
pstmt.setDate(2, sqlDate);
pstmt.executeUpdate();
System.out.println("The type of the first parameter is: "
+ pstmt.getParameterMetaData().getParameterTypeName(1));
System.out.println(pstmt.getParameterMetaData().isNullable(1));
conn.close();
}
private static Connection getConnection() throws Exception {
Class.forName("org.hsqldb.jdbcDriver");
String url = "jdbc:hsqldb:mem:data/tutorial";
return DriverManager.getConnection(url, "sa", "");
}
}</source>
ParameterMetaData Methods for Property Information about Query Parameters
Metadata information for a PreparedStatement or CallableStatement.
- int getParameterCount()
- java.lang.String getParameterClassName(int param)
- int getParameterType(int param)
- java.lang.String getParameterTypeName(int param)
- int getPrecision(int param)
- int getScale(int param)
- int isNullable(int param)
- boolean isSigned(int param)
