javaweb學習總結(三十七)——獲得MySQL數據庫自動生成的主鍵

　　測試腳本如下：

 create table test1
(
     id int primary key auto_increment,
     name varchar(20)
);

　　測試代碼：

package me.gacl.demo;

import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import me.gacl.utils.JdbcUtils;

public class Test {
    public static void main(String[] args) {
        Connection conn = null;
        PreparedStatement st = null;
        ResultSet rs = null;
        try{
            conn = JdbcUtils.getConnection();
            String sql = "insert into test1(name) values(?)";
            st = conn.prepareStatement(sql);
            st.setString(1, "aaa");
            st.executeUpdate();
            //獲取數據庫自動生成的主鍵
            rs = st.getGeneratedKeys();
            if(rs.next()){
                System.out.println(rs.getInt(1));
            }
        }catch (Exception e) {
            e.printStackTrace();
        }finally{
            JdbcUtils.release(conn, st, rs);
        }
    }
}