1. 載入驅動程式
2. 建立連線
3. 建立Statement物件
4. 執行查詢

一般查詢

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

public class testStatement {

    public static void main(String[] args) {
        String url="jdbc:mysql://localhost:3306/test?useUnicode=true&characterEncoding=utf8"
 
;

        try {
            //載入驅動程式
            Class.forName("com.mysql.jdbc.Driver");
            //建立連線
            Connection con = DriverManager.getConnection(url, "root", "123456");
            //建立 Statement 物件
            Statement st = con.createStatement();
            //設定選項
            st.setMaxRows
 
(100);
            //執行查詢
            ResultSet rs = st.executeQuery("SELECT * FROM employee");
            //獲取選項設定情況
            //System.out.println("Row length limit:"+st.getMaxFieldSize());
            //Access 資料庫不支援 getMaxFieldSize() 方法
            System.out.println("ResultSet MaxRows:"+st.getMaxRows());
 

            System.out.println("Query Time Out:"+st.getQueryTimeout());
            //取出資料
            String name;
            int id;
            while(rs.next()) {
                id = rs.getInt("employee_id");
                name = rs.getString("employee_name");
                System.out.println("ID:"+id+"\tNAME:"+name);
            }
            //關閉物件
            st.close();
        } catch (Exception ex) {
            ex.printStackTrace();
        }
    }

}

引數查詢

//建立 PreparedStatement 物件
String sqlStr = "SELECT * FROM employee WHERE employee_age>? ";
PreparedStatement ps = con.prepareStatement(sqlStr);
ps.setInt(1, 25);
//執行查詢，獲取結果集
ResultSet rs = ps.executeQuery();

儲存過程

//建立CallableStatement
CallableStatement cs = con.prepareCall("{call testquery()}");
//執行查詢，獲取結果集
ResultSet rs = cs.executeQuery();