其實(shí)，這篇短文，我早就應(yīng)該寫(xiě)了。因?yàn)椋琷ava存儲(chǔ)過(guò)程今后在各大數(shù)據(jù)庫(kù)廠商中越來(lái)越流行，功能也越來(lái)越強(qiáng)大。這里以O(shè)racle為例，介紹一下java存儲(chǔ)過(guò)程的具體用法。

3. 我推薦的一種方法，直接使用loadjava命令遠(yuǎn)程裝載并創(chuàng)建。
先創(chuàng)建一個(gè)類, e.g.

復(fù)制代碼代碼如下:

import java.sql.*; 
import oracle.jdbc.*; 

public class OracleJavaProc ...{ 

//Add a salgrade to the database. 
public static void addSalGrade(int grade, int losal, int hisal) ...{ 

System.out.println("Creating new salgrade for EMPLOYEE..."); 

try ...{ 
Connection conn = 
DriverManager.getConnection("jdbc:default:connection:"); 

String sql = 
"INSERT INTO salgrade " + 
"(GRADE,LOSAL,HISAL) " + 
"VALUES(?,?,?)"; 
PreparedStatement pstmt = conn.prepareStatement(sql); 
pstmt.setInt(1,grade); 
pstmt.setInt(2,losal); 
pstmt.setInt(3,hisal); 
pstmt.executeUpdate(); 
pstmt.close(); 
} 
catch(SQLException e) ...{ 
System.err.println("ERROR! Adding Salgrade: " 
+ e.getMessage()); 
} 
} 
}

使用loadjava命令將其裝載到服務(wù)器端并編譯：

復(fù)制代碼代碼如下:

D:eclipse3.1workspacedbtest>loadjava -u scott/tiger@iihero.oracledb -v -resolve Or 
acleJavaProc.java 
arguments: '-u' 'scott/tiger@iihero.oracledb '-v' '-resolve' 'OracleJavaProc.java' 
creating : source OracleJavaProc 
loading : source OracleJavaProc 
resolving: source OracleJavaProc

查詢一下?tīng)顟B(tài)：

連接到:
Oracle9i Enterprise Edition Release 9.2.0.1.0 - Production
With the Partitioning, OLAP and Oracle Data Mining options
JServer Release 9.2.0.1.0 - Production

復(fù)制代碼代碼如下:

SQL> SELECT object_name, object_type, status FROM user_objects WHERE object_type LIKE 'JAVA%'; 

OBJECT_NAME 
-------------------------------------------------------------------------------- 

OBJECT_TYPE STATUS 
------------------------------------ -------------- 
OracleJavaProc 
JAVA CLASS VALID 

OracleJavaProc 
JAVA SOURCE VALID 

測(cè)試一下存儲(chǔ)過(guò)程：

復(fù)制代碼代碼如下:

SQL> create or replace procedure add_salgrade(id number, losal number, hisal num 
ber) as language java name 'OracleJavaProc.addSalGrade(int, int, int)'; 
2 / 

過(guò)程已創(chuàng)建。 

SQL> set serveroutput on size 2000 
SQL> call dbms_java.set_output(2000); 

調(diào)用完成。 

SQL> execute add_salgrade(6, 10000, 15000); 
Creating new salgrade for EMPLOYEE... 

PL/SQL 過(guò)程已成功完成。 

SQL> select * from salgrade where grade=6; 

GRADE LOSAL HISAL 
---------- ---------- ---------- 
6 10000 15000