javaweb学习总结(三十七)——获得MySQL数据库自动生成的主键

　测试脚本如下：

1  create table test12 (3      id int primary key auto_increment,4      name varchar(20)5 );

　　测试代码：

 1 package me.gacl.demo; 2 3 import java.sql.Connection; 4 import java.sql.PreparedStatement; 5 import java.sql.ResultSet; 6 import me.gacl.utils.JdbcUtils; 7 8 public class Test { 9     public static void main(String[] args) {10         Connection conn = null;11         PreparedStatement st = null;12         ResultSet rs = null;13         try{14             conn = JdbcUtils.getConnection();15             String sql = "insert into test1(name) values(?)";16             st = conn.prepareStatement(sql);17             st.setString(1, "aaa");18             st.executeUpdate();19             //获取数据库自动生成的主键20             rs = st.getGeneratedKeys();21             if(rs.next()){22                 System.out.println(rs.getInt(1));23             }24         }catch (Exception e) {25             e.printStackTrace();26         }finally{27             JdbcUtils.release(conn, st, rs);28         }29     }30 }