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Java跟Oracle之间最常用的是Java调用Oracle的存储过程,以下简要说明下Java如何对Oracle存储过程进行调用。

Java跟Oracle之间最常用的是Java调用Oracle的存储过程,以下简要说明下Java如何对Oracle存储过程进行调用。

Ⅰ、Java调用Oracle存储过程【不带输出参数】

过程名称为pro1,参数个数1个,数据类型为整形数据。

import java.sql.*; 
 
public class ProcedureNoArgs { 
  public static void main(String args[]) throws Exception { 
    // 加载Oracle驱动 
    DriverManager.registerDriver(new oracle.jdbc.driver.OracleDriver()); 
    // 获得Oracle数据库连接 
    Connection conn = DriverManager.getConnection( 
        " jdbc:oracle:thin:@MyDbComputerNameOrIP:1521:ORCL", sUsr, sPwd); 
    // 创建存储过程的对象 
    CallableStatement c = conn.divpareCall(" {call pro1(?)} "); 
    // 给Oracle存储过程的参数设置值 ,,将第一个参数的值设置成188 
    c.setInt(1, 188); 
    // 执行Oracle存储过程 
    c.execute(); 
    conn.close(); 
  } 
}

Ⅱ、JAVA调用Oracle存储过程【带输出参数的情况】
过程名称为pro2,参数个数2个,数据类型为整形数据,返回值为整形类型

import java.sql.*; 
 
public class ProcedureWithArgs { 
  public static void main(String args[]) throws Exception { 
    // 加载Oracle驱动 
    DriverManager.registerDriver(new oracle.jdbc.driver.OracleDriver()); 
    // 获得Oracle数据库连接 
    Connection conn = DriverManager.getConnection( 
        "jdbc:oracle:thin:@MyDbComputerNameOrIP:1521:ORCL", sUsr, sPwd); 
    // 创建Oracle存储过程的对象,调用存储过程 
    CallableStatement c = conn.divpareCall("{call pro2(?,?)}"); 
    // 给Oracle存储过程的参数设置值 ,将第一个参数的值设置成188 
    c.setInt(1, 188); 
    // 注册存储过程的第二个参数 
    c.registerOutParameter(2, java.sql.Types.INTEGER); 
    // 执行Oracle存储过程 
    c.execute(); 
    // 得到存储过程的输出参数值并打印出来 
    System.out.println(c.getInt(2)); 
    conn.close(); 
  } 
}

   以上即是在JAVA中调用Oracle存储过程的最简单的实例,接下来将介绍有关JAVA跟Oracle存储过程的其他方面内容。


二、使用JAVA创建Oracle存储过程
先看下如何使用JAVA来编写Oracle存储过程,我们在Oracle的sql plus中编写语句。
Ⅰ、启动SQL PLUS
Ⅱ、编写JAVA类,定义JAVA类别名,本存储过程为简单地输出传入参数的平方值。

create or replace and compile java source named  "PF"  as
/** 
* 通过JAVA类来 创建Oracle存储过程 
*/ 
package org.oraclejava.pro; 
 
public class javaCreatePro { 
  public static String test(int num) { 
    return num + "的平方为: " + num * num; 
  } 
}

Ⅲ、将JAVA类中的方法test创建为一个Oracle函数方法

create or replace function PF_FUN(name integer) return varchar2 as language java name 'org.oraclejava.pro.javaCreatePro.test(java.lang.Integer) return java.lang.String'; 


Ⅳ、在控制台直接调用创建的Oracle函数

  select PF_FUN(10) from dual;

Ⅴ、输出结果
10的平方为:100

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