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| 加载数据库JDBC驱动程序和运行查询 |
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import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;
public class HelloMySQLJDBC {
Connection connection;
private void displaySQLErrors(SQLException e) {
System.out.println("SQLException: " + e.getMessage());
System.out.println("SQLState: " + e.getSQLState());
System.out.println("VendorError: " + e.getErrorCode());
}
public HelloMySQLJDBC() {
try {
Class.forName("com.mysql.jdbc.Driver").newInstance();
} catch (Exception e) {
System.err.println("Unable to find and load driver");
System.exit(1);
}
}
public void connectToDB() {
try {
connection = DriverManager.getConnection("jdbc:mysql://192.168.1.25/accounts?user=spider&password=spider");
} catch (SQLException e) {
displaySQLErrors(e);
}
}
public void executeSQL() {
try {
Statement statement = connection.createStatement();
ResultSet rs = statement.executeQuery("SELECT * FROM bool");
while (rs.next()) {
System.out.println(rs.getString("a") + " " + rs.getBoolean("a"));
System.out.println(rs.getString("b") + " " + rs.getBoolean("b"));
System.out.println(rs.getString("c") + " " + rs.getBoolean("c"));
System.out.println(rs.getString("d") + " " + rs.getBoolean("d"));
}
rs.close();
statement.close();
connection.close();
} catch (SQLException e) {
displaySQLErrors(e);
}
}
public static void main(String[] args) {
HelloMySQLJDBC hello = new HelloMySQLJDBC();
hello.connectToDB();
hello.executeSQL();
}
}
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