数据库的测试代码如下 :
1、新建表test,sql代码如下:
create table test( field1 int not null ) TYPE=MyISAM ; insert into test(field1) values(1);
2、删除已存在的存储过程,代码如下:
delimiter // -- 定义结束符号 drop procedure p_test;
3、mysql存储过程定义,代码如下:
create procedure p_test() begin declare temp int; set temp = 0; update test set field1 = values(temp); end
4、 Java调用带有输入参数的存储过程,代码如下:
public static void callIn(int in){ //获取连接 Connection conn = ConnectDb.getConnection(); CallableStatement cs = null; try { //可以直接传入参数 //cs = conn.prepareCall("{call sp1(1)}"); //也可以用问号代替 cs = conn.prepareCall("{call sp1(?)}"); //设置第一个输入参数的值为110 cs.setInt(1, in); cs.execute(); } catch (Exception e) { e.printStackTrace(); } finally { try { if(cs != null){ cs.close(); } if(conn != null){ conn.close(); } } catch (Exception ex) { ex.printStackTrace(); } } }
5、Java调用带有输出参数的存储过程,代码如下:
public static void callOut() { Connection conn = ConnectDb.getConnection(); CallableStatement cs = null; try { cs = conn.prepareCall("{call sp2(?)}"); //第一个参数的类型为Int cs.registerOutParameter(1, Types.INTEGER); cs.execute(); //得到第一个值 int i = cs.getInt(1); System.out.println(i); } catch (Exception e) { e.printStackTrace(); } finally { try { if(cs != null){ cs.close(); } if(conn != null){ conn.close(); } } catch (Exception ex) { ex.printStackTrace(); } } }
6、Java调用输出结果集的存储过程,代码如下:
public static void callResult(){ Connection conn = ConnectDb.getConnection(); CallableStatement cs = null; ResultSet rs = null; try { cs = conn.prepareCall("{call sp6()}"); rs = cs.executeQuery(); //循环输出结果 while(rs.next()){ System.out.println(rs.getString(1)); } } catch (Exception e) { e.printStackTrace(); } finally { try { if(rs != null){ rs.close(); } if(cs != null){ cs.close(); } if(conn != null){ conn.close(); } } catch (Exception ex) { ex.printStackTrace(); } } } }
7、Java获取数据库连接的工具类,代码如下:
import java.sql.Connection; import java.sql.DriverManager; import java.sql.PreparedStatement; import java.sql.ResultSet; import java.sql.SQLException; import java.sql.Statement; public class ConnectDb { public static Connection getConnection(){ Connection conn = null; PreparedStatement preparedstatement = null; try { Class.forName("org.gjt.mm.mysql.Driver").newInstance(); String dbname = "test"; String url="jdbc:mysql://localhost/dbname?user=root&password=root&useUnicode=true&characterEncoding=utf-8"; conn= DriverManager.getConnection(url); } catch (Exception e) { e.printStackTrace(); } return conn; } }
时间: 2024-10-05 21:16:29