jdbc调用 oracle 存储过程操作

创建有参存储函数findEmpNameAndSal(编号)，查询7902号员工的的姓名和月薪，【返回多个值，演示out的用法】
当返回2个或多个值，必须使用out符号
当返回1个值，就无需out符号

create or replace function findEmpNameAndSal(pempno in number,pename out varchar2) return number
as
psal emp.sal%type;
begin
select ename,sal into pename,psal from emp where empno=pempno;
--返回月薪
return psal;
end;
/

---------------------------------------相互转值

以下为测试调用

declare
psal emp.sal%type;
pename emp.ename%type;
begin
psal := findEmpNameAndSal(7902,pename);
dbms_output.put_line('7902号员工的姓名'||pename||'，薪水是'||psal);
end;
/

存储过程

创建有参存储过程findEmpNameAndSalAndJob(编号)，查询7902号员工的的姓名，职位，月薪【演示out的用法】
create or replace procedure
findEmpNameAndSalAndJob(pempno in number,pename out varchar2,pjob out varchar2,psal out number)
as
begin
select ename,job,sal into pename,pjob,psal from emp where empno=pempno;
end;
/

以下测试调用

declare
pename emp.ename%type;
pjob emp.job%type;
psal emp.sal%type;
begin
findEmpNameAndSalAndJob(7902,pename,pjob,psal);
dbms_output.put_line('7902号员工的姓名是'||pename||':'||pjob||':'||psal);
end;
/

JDBC连接oracle

JdbcUtil.java 

 package cn.itcast.web.oracle.util;

 import java.sql.Connection;
 import java.sql.DriverManager;
 import java.sql.ResultSet;
 import java.sql.Statement;

 public class JdbcUtil {
     private static String driver = "oracle.jdbc.driver.OracleDriver";
     //1521是主端口，也可能是其它端口去连接oracle数据库
     private static String url = "jdbc:oracle:thin:@127.0.0.1:1521:orcl";
     private static String username = "scott";
     private static String password = "friends";
     private static Connection conn;
     private static Statement stmt;
     private static ResultSet rs;
     //注册数据库驱动
     static{
         try {
             Class.forName(driver);
         } catch (Exception e) {
             e.printStackTrace();
             throw new RuntimeException("oracle驱动注册失败");
         }
     }
     //获取数据库连接
     public static Connection getConnection(){
         Connection conn = null;
         try {
             conn = DriverManager.getConnection(url,username,password);
         } catch (Exception e) {
             e.printStackTrace();
             throw new RuntimeException("oracle连接获取失败");
         }
         return conn;
     }
     //关闭连接对象
         public static void close(Connection conn){
             if(conn!=null){
                 try {
                     conn.close();
                 } catch (Exception e) {
                     e.printStackTrace();
                     throw new RuntimeException("oracle连接关闭失败");
                 }
             }
         }
         public static void close(Statement stmt){
             if(stmt!=null){
                 try {
                     stmt.close();
                 } catch (Exception e) {
                     e.printStackTrace();
                     throw new RuntimeException("oracle连接关闭失败");
                 }
             }
         }
         public static void close(ResultSet rs){
             if(rs!=null){
                 try {
                     rs.close();
                 } catch (Exception e) {
                     e.printStackTrace();
                     throw new RuntimeException("oracle连接关闭失败");
                 }
             }
         }
 }

测试

     @Test
     public void testConnection()
     {
         Connection conn=JdbcUtil.getConnection();
         System.out.println(conn==null?"no":"yes");
     }
     

测试存储过程

 //Java调用存储过程和函数
 public class OracleDao {
     //调用存储过程
     @Test
     public void callProcedure() throws Exception{
         Connection conn = JdbcUtil.getConnection();
         //第一参数:in  编号 7902
         //第二参数:out 姓名
         //第三参数:out 工作
         //第四参数:out 薪水
         String sql = "call findEmpNameAndSalAndJob(?,?,?,?)";
         //创建专用于调用过程或函数的对象
         CallableStatement cstmt = conn.prepareCall(sql);
         //为?占位符设置in、out值
         //hibernate从0开始，jdbc从1开始
         cstmt.setInt(1,7902);//in值
         cstmt.registerOutParameter(2,Types.VARCHAR);//out值
         cstmt.registerOutParameter(3,Types.VARCHAR);//out值
         cstmt.registerOutParameter(4,Types.INTEGER);//out值
         cstmt.execute();//抛行调用存储过程
         //依次接收3个返回值
         String ename = cstmt.getString(2);
         String job = cstmt.getString(3);
         Integer sal = cstmt.getInt(4);
         //显示
         System.out.println(ename+"的工作是：" + job + "，它是薪水是" + sal);
         //关闭连接对象
         JdbcUtil.close(cstmt);
         JdbcUtil.close(conn);
     }
     //调用存储函数
     @Test
     public void callFunction() throws Exception{
         Connection conn = JdbcUtil.getConnection();
         //参数一：in  编号 数值型
         //参数二：out 姓名 字符串型
         //返回值：out 薪水 数值型
         String sql = "{? = call findEmpNameAndSal(?,?)}";
         CallableStatement cstmt = conn.prepareCall(sql);
         cstmt.setInt(2,7788);//in
         cstmt.registerOutParameter(3,Types.VARCHAR);//out
         cstmt.registerOutParameter(1,Types.INTEGER);//返回值
         cstmt.execute();//执行调用存储函数
         String ename = cstmt.getString(3);
         Integer sal = cstmt.getInt(1);
         System.out.println(ename+"的薪水是"+sal);
         //关闭连接对象
         JdbcUtil.close(cstmt);
         JdbcUtil.close(conn);
     }
 }