JDBC 动态查询

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

import com.mysql.jdbc.PreparedStatement;
import com.mysql.jdbc.Statement;

public class JDbc {

	public static void main(String[] args) {
		Connection connection = null;
		
		
		try {
			Class.forName("com.mysql.jdbc.Driver");//加载Driver类
			connection = DriverManager.getConnection("jdbc:mysql://127.0.0.1:3306/test02?useUnicode=true&characterEncoding=UTF-8","root","root");//链接数据库
			//查询不到中文字加入useUnicode=true&characterEncoding=UTF-8 
			String string = "select * from tb_peo where  name = ? ";//满足两个条件之一
			PreparedStatement preparedStatement = (PreparedStatement) connection.prepareStatement(string);

			preparedStatement.setString(1, "郭");//name = "郭"的用户
			//preparedStatement.setInt(2, 2);//id = 2 的用户
			ResultSet resultSet = preparedStatement.executeQuery();
			System.out.println("id"+"\t"+"name\tbirthday");
			while(resultSet.next()){
				System.out.println(resultSet.getInt(1)+"\t"+resultSet.getString("name")+"\t"+resultSet.getString("birthday"));
			}
			
		} catch (SQLException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		} catch (ClassNotFoundException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}finally{
			
			try {
				connection.close();
			} catch (SQLException e) {
				// TODO Auto-generated catch block
				e.printStackTrace();
			}
			
		}
		
		}
}