最规范的java连接mysql的实例

 

import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;

public class TestJDBC {
	public static void main(String[] args) {
		Connection conn = null;
		Statement stmt = null;
		ResultSet rs = null;

		String driver = "com.mysql.jdbc.Driver";
		String url = "jdbc:mysql://localhost/mydata?user=root&password=root";
		String sql = "select * from dept";

		try {
			Class.forName(driver);
			conn = DriverManager.getConnection(url, "root", "root");
			stmt = conn.createStatement();
			rs = stmt.executeQuery(sql);
			while (rs.next()) {
				System.out.println(rs.getString("deptno"));
			}

		} catch (ClassNotFoundException e) {
			e.printStackTrace();
		} catch (SQLException e) {
			System.out.println("SQLException: " + e.getMessage());
			System.out.println("SQLState: " + e.getSQLState());
			System.out.println("VendorError: " + e.getErrorCode());

		} finally {
			try {
				if (rs != null) {
					rs.close();
					rs = null;
				}
				if (stmt != null) {
					stmt.close();
					stmt = null;
				}
				if (conn != null) {
					conn.close();
					conn = null;
				}
			} catch (SQLException e) {
				e.printStackTrace();
			}
		}

	}
}

 

评论

1 楼 wildpointer 2011-04-12  

程序没问题。
就是没有注释。
应该再说说java-connect怎么设置。