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2010-06-01T05:06:11Z

1 версия

в 17:44, 31 мая 2010

2010-05-31T17:44:27Z

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== Create a Database Table Using a Statement ==



<source lang="java">
import java.sql.Connection;
import java.sql.DataTruncation;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.ResultSetMetaData;
import java.sql.SQLWarning;
import java.sql.Statement;
public class Main {
public static void main(String[] args) throws Exception {
Connection conn = getConnection();
conn.setAutoCommit(false);
Statement stmt = conn.createStatement();
stmt.executeUpdate("create table survey (id int, name CHAR(5) );");
stmt.executeUpdate("INSERT INTO survey(id, name)VALUES(111, "123456789")");
// since there were no errors, commit
conn.rumit();
ResultSet rs = stmt.executeQuery("SELECT * FROM survey");
outputResultSet(rs);
rs.close();
stmt.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", "");
}
}</source>



<pre class=codeResult>ID NAME
----------------------
111 123456789</pre>

== Drop a Database Table Using a Statement ==



<source lang="java">
import java.sql.Connection;
import java.sql.DataTruncation;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.ResultSetMetaData;
import java.sql.SQLWarning;
import java.sql.Statement;
public class Main {
public static void main(String[] args) throws Exception {
Connection conn = getConnection();
conn.setAutoCommit(false);
Statement stmt = conn.createStatement();
stmt.executeUpdate("create table survey (id int, name CHAR(5) );");
stmt.executeUpdate("INSERT INTO survey(id, name)VALUES(111, "123456789")");
// since there were no errors, commit
conn.rumit();
ResultSet rs = stmt.executeQuery("SELECT * FROM survey");
outputResultSet(rs);
stmt.executeUpdate("drop table survey");

rs.close();
stmt.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", "");
}
}</source>



<pre class=codeResult>ID NAME
----------------------
111 123456789</pre>

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Admin: 1 версия

в 17:44, 31 мая 2010