Jdbc操作数据库  查

import java.sql.Connection;

import java.sql.PreparedStatement;

import java.sql.ResultSet;

import java.sql.SQLException;

 

//预处理方式

public class preperSTest {

 

        public static void main(String[] args) throws SQLException {

                  find();

        }

 

        private static void find() throws SQLException {

                  Connection conn = null;

                  PreparedStatement ps = null;

                  ResultSet rs = null;

 

                  try {

                           // 创建连接

                           conn = JdbcUtils.getConnection();

 

                           String sql = " select id,name ,book from  student  where id = ?";

 

                           ps = conn.prepareStatement(sql);

                           // 代替 占位符

                           ps.setInt(1, 2);

 

 

                           

                           

           rs = ps.executeQuery();

           

                            while (rs.next()) {

                            System.out.println(rs.getInt("id")+"\t"+rs.getString("name")+ "\t"

                            + rs.getString("book"));

                            }

                  } finally {

                           JdbcUtils.release(rs, ps, conn);

                  }

 

        }

}

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