Question

这里我试图将List传递给存储过程，但收到以下错误：

操作数类型冲突：nvarchar与UserType
不兼容

//Stored Procedure
ALTER PROCEDURE [dbo].[UserDetails]
(
                @OutId NVARCHAR(50) OUTPUT,
                @Type NVARCHAR(50) Type,
                ,@Preload UserType READONLY
)
AS

UserDefined数据类型

CREATE TYPE [dbo].[UserType] AS TABLE(
                [Id] [int] NULL,
                [Name] [nvarchar](50) NULL,
                [Company] [nvarchar](100) NULL,
                [PNumber] [nvarchar](100) NULL,
                [FClass] [nvarchar](100) NULL,
)
GO

JAVA Class

package Test;

import java.sql.Array;
import java.sql.CallableStatement;
import java.sql.Clob;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.PreparedStatement;
import java.sql.SQLException;
import java.util.ArrayList;
import java.util.List;

public class TestPreload {

                public static void main(String[] args) {
                                // TODO Auto-generated method stub
                                ArrayList<ArrayList<String>> PreloadUser=new ArrayList<ArrayList<String>>();
                                ArrayList<String> Preload=new ArrayList<String>();

                                Preload.add("1");
                                Preload.add("Danny");
                                Preload.add("123");
                                Preload.add("123");
                                Preload.add("N/A");

                                PreloadUser.add(Preload);

                                ArrayList<String> Preload2=new ArrayList<String>();
                                Preload2.add("1");
                                Preload2.add("Sam");
                                Preload2.add("123");
                                Preload2.add("123");
                                Preload2.add("N/A");

                                PreloadUser.add(Preload2);

                                try {
                                                DriverManager
                                                                                .registerDriver(new com.microsoft.sqlserver.jdbc.SQLServerDriver());
                                                Connection conn = DriverManager
                                                                                .getConnection("jdbc:sqlserver://....");
                                                CallableStatement stmt = conn
                                                                                .prepareCall("{call UserDetails(?,?,?)}");
                                                stmt.setString(2, "Test");
                                                stmt.setString(3, PreloadUser.toString());
                                                //stmt.setObject(3, PreloadUser.toString());

                                                stmt.registerOutParameter(1, java.sql.Types.VARCHAR);
                                                stmt.execute();
                                                System.out.println("OUTPUT : " + stmt.getString(1));
                                                                                                } catch (SQLException e) {
                                                // TODO Auto-generated catch block
                                                e.printStackTrace();
                                }

                }

}

堆栈追踪：

com.microsoft.sqlserver.jdbc.SQLServerException：操作数类型冲突： nvarchar与UserType不兼容 at com.microsoft.sqlserver.jdbc.SQLServerException.makeFromDatabaseError（SQLServerException.java:196）在com.microsoft.sqlserver.jdbc.SQLServerStatement.getNextResult（SQLServerStatement.java:1454） at com.microsoft.sqlserver.jdbc.SQLServerPreparedStatement.doExecutePreparedStatement（SQLServerPreparedStatement.java:388） at com.microsoft.sqlserver.jdbc.SQLServerPreparedStatement $ PrepStmtExecCmd.doExecute（SQLServerPreparedStatement.java:338）在com.microsoft.sqlserver.jdbc.TDSCommand.execute（IOBuffer.java:4026）在com.microsoft.sqlserver.jdbc.SQLServerConnection.executeCommand（SQLServerConnection.java:1416）在com.microsoft.sqlserver.jdbc.SQLServerStatement.executeCommand（SQLServerStatement.java:185）在com.microsoft.sqlserver.jdbc.SQLServerStatement.executeStatement（SQLServerStatement.java:160）在com.microsoft.sqlserver.jdbc.SQLServerPreparedStatement.execute（SQLServerPreparedStatement.java:320） at carma.TestInsurence.main（TestPreload.java:71）

Answer 1

您正在执行{call UserDetails(?,?,?)}，但您的存储过程不会进行任何参数。您需要按如下方式更改存储过程：

CREATE PROCEDURE dbo.sp_Students_INS_byPK
       @user_id                     INT                       , 
       @user_name                   NVARCHAR(50)      = NULL  , 
       @user_company                NVARCHAR(100)     = NULL  ,
       @user_pno                    NVARCHAR(100)     = NULL  ,
       @user_fclass                 NVARCHAR(100)     = NULL  ,
AS 
BEGIN 
     SET NOCOUNT ON 

     INSERT INTO dbo.Students
          ( 
            Id                            ,
            Name                          ,
            Company                       ,
            PNumber                       ,
            FClass                                  
          ) 
     VALUES 
          ( 
            @user_id                      ,
            @user_name                    ,
            @user_company                 ,
            @user_pno                     ,
            @user_fclass                                  
          ) 

END

按如下方式更改您的代码：

CallableStatement stmt = conn.prepareCall("{call UserDetails(?,?,?,?,?)}");
stmt.setInt(1, 1);
stmt.setString(2, "Sam");
stmt.setString(3, "123");
stmt.setString(4, "123");
stmt.setString(5, "N/A");
stmt.execute();

此外，我不明白为什么要通过调用存储过程在表中插入数据。您可以简单地使用PreparedStatement来执行此操作。这是一个例子：

public static void main(String[] args) {
   Connection conn = null;
   PreparedStatement stmt = null;
   try{
      DriverManager.registerDriver(new com.microsoft.sqlserver.jdbc.SQLServerDriver());
      conn = DriverManager.getConnection("jdbc:sqlserver://....");

      String sql = "INSERT INTO UserType("Id", "Name",
            "Company", "PNumber", "FClass") VALUES(?,?,?,?,?)";
      stmt = conn.prepareStatement(sql);

      stmt.setInt(1, 1);
      stmt.setString(2, "Sam");
      stmt.setString(3, "123");
      stmt.setString(4, "123");
      stmt.setString(5, "N/A");

      stmt.executeUpdate();

      stmt.close();
      conn.close();
   }catch(Exception ex){
      ex.printStackTrace();
   }finally{
      try{
         if(numm != stmt)
            stmt.close();
      }catch(SQLException se){
         se.printStackTrace();
      }
      try{
         if(null != conn)
            conn.close();
      }catch(SQLException se){
         se.printStackTrace();
      }
   }
}

如果您使用的是Spring Framework，那么可以使用JdbcTemplate轻松完成。这是一个例子：

SimpleJdbcInsert insertUser = new SimpleJdbcInsert(jdbcTemplate)
            .withTableName("UserType").usingColumns("Id", "Name",
            "Company", "PNumber", "FClass");

Map<String,Object> insertParameters = new HashMap<String, Object>();

/* Put Values */
insertParameters.put("Id", 1);
insertParameters.put("Name", "Sam");
insertParameters.put("Company", "123");
insertParameters.put("PNumber", "123");
insertParameters.put("FClass", "N/A");

Number generatedId = insertUser.execute(insertParameters);

通过Arraylst <arraylist <string>＆gt;使用JAVA到MSSQL存储过程？

1 个答案: