下面將舉出JAVA對據庫存儲過程的調用
ConnUtils連接工具類：用來獲取連接、釋放資源
package com.ljq.test;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;
/**
* 連接工具類
*
* ConnUtils類聲明爲final類說明此類不可以被繼承
*
* @author jiqinlin
*
*/
public final class ConnUtils {
private static String url = "jdbc:oracle:thin:@localhost:1521:orcl";
private static String user = "test";
private static String password = "test";
/**
* 說明要訪問此類只能通過static或單例模式
*/
private ConnUtils() {
}
// 註冊驅動 (只做一次)
static {
try {
Class.forName("oracle.jdbc.driver.OracleDriver");
} catch (ClassNotFoundException e) {
throw new ExceptionInInitializerError(e);
}
}
/**
* 獲取Connection對象
*
* @return
* @throws SQLException
*/
public static Connection getConnection() throws SQLException {
return DriverManager.getConnection(url, user, password);
}
/**
* 釋放資源
*
* @param rs
* @param st
* @param conn
*/
public static void free(ResultSet rs, Statement st, Connection conn) {
try {
if (rs != null)
rs.close();
} catch (SQLException e) {
e.printStackTrace();
} finally {
try {
if (st != null)
st.close();
} catch (SQLException e) {
e.printStackTrace();
} finally {
if (conn != null)
try {
conn.close();
} catch (SQLException e) {
e.printStackTrace();
}
}
}
}
}
創建帶出參存儲過程代碼：
--帶出參存儲過程
CREATE OR REPLACE PROCEDURE stu_proc(v_name OUT VARCHAR2) AS
BEGIN
SELECT o.sname INTO v_name FROM student o where o.id = 2;
END;
使用java調用帶出參的存儲過程
package com.ljq.test;
import java.sql.CallableStatement;
import java.sql.Connection;
import java.sql.SQLException;
import java.sql.Types;
public class ProceTest {
public static void main(String[] args) throws Exception {
Connection conn = null;
CallableStatement statement = null;
String sql = "{call stu_proc(?)}";
try {
conn = ConnUtils.getConnection();
statement = conn.prepareCall(sql);
statement.registerOutParameter(1, Types.VARCHAR);
statement.executeUpdate();
//輸出：lisi
String sname = statement.getString(1);
System.out.println(sname);
} catch (SQLException e) {
e.printStackTrace();
}finally{
ConnUtils.free(null, statement, conn);
}
}
}
創建帶出入參存儲過程代碼
--帶出入參存儲過程
CREATE OR REPLACE PROCEDURE stu_proc(v_id IN NUMBER, v_name OUT VARCHAR2) AS
BEGIN
SELECT o.sname INTO v_name FROM student o where o.id = v_id;
END;
使用JAVA調用帶出入參存儲過程
package com.ljq.test;
import java.sql.CallableStatement;
import java.sql.Connection;
import java.sql.SQLException;
import java.sql.Types;
public class ProceTest {
public static void main(String[] args) throws Exception {
Connection conn = null;
CallableStatement statement = null;
String sql = "{call stu_proc(?, ?)}";
try {
conn = ConnUtils.getConnection();
statement = conn.prepareCall(sql);
statement.setInt(1, 1);
statement.registerOutParameter(2, Types.VARCHAR);
statement.executeUpdate();
//輸出：zhangsan
String sname = statement.getString(2);
System.out.println(sname);
} catch (SQLException e) {
e.printStackTrace();
}finally{
ConnUtils.free(null, statement, conn);
}
}
}
