Mega Code Archive
Create a PreparedStatement object with two parameter markers
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import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.PreparedStatement;
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 = getConnection();
Statement st = conn
.createStatement();
st.executeUpdate("create table survey (id int, name VARCHAR(30) );");
String INSERT_RECORD = "insert into survey(id, name) values(?,?)";
PreparedStatement pstmt = conn.prepareStatement(INSERT_RECORD);
pstmt.setString(1, "1");
pstmt.setString(2, "name1");
pstmt.executeUpdate();
ResultSet rs = st.executeQuery("SELECT * FROM survey");
outputResultSet(rs);
pstmt.setString(1, "2");
pstmt.setString(2, "name2");
pstmt.executeUpdate();
rs = st.executeQuery("SELECT * FROM survey");
outputResultSet(rs);
rs.close();
st.close();
conn.close();
}
private static void outputResultSet(ResultSet rs) throws Exception {
ResultSetMetaData rsMetaData = rs.getMetaData();
int numberOfColumns = rsMetaData.getColumnCount();
for (int i = 1; i < numberOfColumns + 1; i++) {
String columnName = rsMetaData.getColumnName(i);
System.out.print(columnName + " ");
}
System.out.println();
System.out.println("----------------------");
while (rs.next()) {
for (int i = 1; i < numberOfColumns + 1; i++) {
System.out.print(rs.getString(i) + " ");
}
System.out.println();
}
}
private static Connection getConnection() throws Exception {
Class.forName("org.hsqldb.jdbcDriver");
String url = "jdbc:hsqldb:mem:data/tutorial";
return DriverManager.getConnection(url, "sa", "");
}
}
ID NAME
----------------------
1 name1
ID NAME
----------------------
1 name1
2 name2
When your SQL query does not have any parameters, you should use a Statement instead
of a PreparedStatement object, unless you are going to use it many times.
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