java挪用mysql存儲進程實例剖析。本站提示廣大學習愛好者:(java挪用mysql存儲進程實例剖析)文章只能為提供參考,不一定能成為您想要的結果。以下是java挪用mysql存儲進程實例剖析正文
本文實例講述了java挪用mysql存儲進程的辦法。分享給年夜家供年夜家參考。詳細以下:
數據庫的測試代碼以下 :
1、新建表test
create table test( field1 int not null ) TYPE=MyISAM ; insert into test(field1) values(1);
2、刪除已存在的存儲進程:
-- 刪除貯存進程 delimiter // -- 界說停止符號 drop procedure p_test;
3、mysql存儲進程界說:
create procedure p_test() begin declare temp int; set temp = 0; update test set field1 = values(temp); end
4、挪用辦法:
CallableStatement cStmt = conn.prepareCall("{call p_test()}"); cStmt.executeUpdate(); import java.sql.*; /** iGoder */ public class ProcedureTest { /* 表和存儲進程界說以下: delimiter // DROP TABLE if exists test // CREATE TABLE test( id int(11) NULL ) // drop procedure if existssp1 // create procedure sp1(in p int) comment 'insert into a int value' begin declare v1 int; set v1 = p; insert into test(id) values(v1); end // drop procedure if exists sp2 // create procedure sp2(out p int) begin select max(id) into p from test; end // drop procedure if exists sp6 // create procedure sp6() begin select * from test; end// */ public static void main(String[] args) { //callIn(111); //callOut(); callResult(); } /** * 挪用帶有輸出參數的存儲進程 * @param in stored procedure input parametervalue */ public static void callIn(int in){ //獲得銜接 Connection conn = ConnectDb.getConnection(); CallableStatement cs = null; try { //可以直接傳入參數 //cs = conn.prepareCall("{call sp1(1)}"); //也能夠用問號取代 cs = conn.prepareCall("{call sp1(?)}"); //設置第一個輸出參數的值為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(); } } } /** * 挪用帶有輸入參數的存儲進程 * */ public static void callOut() { Connection conn = ConnectDb.getConnection(); CallableStatement cs = null; try { cs = conn.prepareCall("{call sp2(?)}"); //第一個參數的類型為Int cs.registerOutParameter(1, Types.INTEGER); cs.execute(); //獲得第一個值 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(); } } } /** * 挪用輸入成果集的存儲進程 */ public static void callResult(){ Connection conn = ConnectDb.getConnection(); CallableStatement cs = null; ResultSet rs = null; try { cs = conn.prepareCall("{call sp6()}"); rs = cs.executeQuery(); //輪回輸入成果 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(); } } } } /** *獲得數據庫銜接的類 */ import java.sql.Connection; import java.sql.DriverManager; import java.sql.PreparedStatement; import java.sql.ResultSet; import java.sql.SQLException; import java.sql.Statement; 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=8859_1"; conn= DriverManager.getConnection(url); } catch (Exception e) { e.printStackTrace(); } return conn; } }
願望本文所述對年夜家的java法式設計有所贊助。