CUBRID学习笔记 38 net调用java的函数过程

首先要设置java_stored_procedure 为yes  该配置项在cubrid.conf中

书写并编译java代码

public class SpCubrid{

     public static String HelloCubrid() {

         return "Hello, Cubrid !!";

     }

     public static int SpInt(int i) {

         return i + 1;

     }

     public static void outTest(String[] o) {

         o0 = "Hello, CUBRID";

     }

 }

 

%javac SpCubrid.java

加载java到数据库

 

% loadjava demodb

 

在数据库中发布java方法

create function hello() return string

as language java

name 'SpCubrid.HelloCubrid() return java.lang.String';

 

在net中调用

2 3	call Hello() into :HELLO; call Sp_int(3) into :i; call phone_info('Tom','016-111-1111');

下面看个完整的代码

创建java方法

 

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using CUBRID.Data.CUBRIDClient;     namespace Sample  {      class ProcedureSample      {          /* conection string */          /* Please modify before using. */          static readonly string _connString = "server=127.0.0.1;database=demodb;port=33000;user=public;password=";                     /*          * create a new java stored function          */         public void create_function()         {             using (CUBRIDConnection conn = new CUBRIDConnection())             {                 conn.ConnectionString = ProcedureSample._connString;                 conn.Open();                   string sql = "CREATE FUNCTION unit_hello(a int) RETURN int AS LANGUAGE JAVA NAME " +                     "'SpCubrid.SpInt(int) return java.lang.Integer;'";                 using (CUBRIDCommand cmd = new CUBRIDCommand(sql, conn))                 {                     cmd.ExecuteNonQuery();                 }             }         }           /*          * create a new java stored procedure          */         public void create_procedure()         {             using (CUBRIDConnection conn = new CUBRIDConnection())             {                 conn.ConnectionString = ProcedureSample._connString;                 conn.Open();                     string sql = "create PROCEDURE UNIT_PHONE_INFO(name varchar, phoneno varchar)" +                              "as language java name 'SpCubrid.AddPhone(java.lang.String,java.lang.String)';";                 using (CUBRIDCommand cmd = new CUBRIDCommand(sql, conn))                 {                     cmd.ExecuteNonQuery();                 }             }         }      }  }

调用

using System.Data;

using CUBRID.Data.CUBRIDClient;

 

namespace Sample

{

    class ProcedureSample

    {

        /* conection string */

        /* Please modify before using. */

        static readonly string _connString = "server=127.0.0.1;database=demodb;port=33000;user=public;password=";

 

        /*

         * call procedure

         */

        public void call_procedure()

        {

            using (CUBRIDConnection conn = new CUBRIDConnection())

            {

                conn.ConnectionString = ProcedureSample._connString;

                conn.Open();

 

                string sql = "CALL UNIT_PHONE_INFO('Tom', '03556315315');";

                using (CUBRIDCommand cmd = new CUBRIDCommand(sql, conn))

                {

                    cmd.ExecuteNonQuery();

                }

            }

        }

 

        /*

         * call function, the function has a return value

         */

        public void call_function()

        {

            using (CUBRIDConnection conn = new CUBRIDConnection())

            {

                conn.ConnectionString = ProcedureSample._connString;

                conn.Open();

 

                string sql = "? = CALL unit_hello(10)";

                using (CUBRIDCommand cmd = new CUBRIDCommand(sql, conn))

                {

                    cmd.CommandType = CommandType.StoredProcedure;

 

                    CUBRIDParameter p1 = new CUBRIDParameter("?p1", CUBRIDDataType.CCI_U_TYPE_INT);

                    p1.Direction = ParameterDirection.Output;   // output

                    cmd.Parameters.Add(p1);

 

                    cmd.ExecuteNonQuery();

 

                    // do something with p1.value

                }

            }

        }

    }

}

删除

using CUBRID.Data.CUBRIDClient;

 

namespace Sample

{

    class ProcedureSample

    {

        /* conection string */

        /* Please modify before using. */

        static readonly string _connString = "server=127.0.0.1;database=demodb;port=33000;user=public;password=";

 

        /*

         * drop java stored function

         */

        public void drop_function()

        {

            using (CUBRIDConnection conn = new CUBRIDConnection())

            {

                conn.ConnectionString = ProcedureSample._connString;

                conn.Open();

 

                string sql = "drop function unit_hello";

                using (CUBRIDCommand cmd = new CUBRIDCommand(sql, conn))

                {

                    cmd.ExecuteNonQuery();

                }

            }

        }

 

        /*

         * drop java stored procedure

         */

        public void drop_procedure()

        {

            using (CUBRIDConnection conn = new CUBRIDConnection())

            {

                conn.ConnectionString = ProcedureSample._connString;

                conn.Open();

 

                string sql = "DROP PROCEDURE UNIT_PHONE_INF";

                using (CUBRIDCommand cmd = new CUBRIDCommand(sql, conn))

                {

                    cmd.ExecuteNonQuery();

                }

            }

        }

    }

}