如何从android应用程序调用存储过程?
我想从SQLServer调用一个存储过程来操作登录页面 但不断出现这样的错误:如何从android应用程序调用存储过程?,android,sql-server-2008,stored-procedures,Android,Sql Server 2008,Stored Procedures,我想从SQLServer调用一个存储过程来操作登录页面 但不断出现这样的错误: import java.sql.CallableStatement; import java.sql.Connection; import java.sql.DriverManager; import java.sql.SQLException; public class Sp { public static void main(String[] args) { String
import java.sql.CallableStatement;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.SQLException;
public class Sp
{
public static void main(String[] args)
{
String dbName = "My_database";
String serverip="192.168.5.10";
String serverport="1433";
String url = "jdbc:sqlserver://"+serverip+"\\SQLEXPRESS:"+serverport+";databaseName="+dbName+"";
try
{
Class.forName("com.microsoft.sqlserver.jdbc.SQLServerDriver");
}
catch(ClassNotFoundException ex)
{
ex.printStackTrace();
}
Connection con=null;
CallableStatement cstmt=null;
try
{
String databaseUserName = "sa";
String databasePassword = "a123";
con= DriverManager.getConnection(url, databaseUserName, databasePassword);
cstmt=con.prepareCall("{? = call spLoginvalidate(@CO_ID)}");//called the procedure
//how to create procedure had writen in bellow
cstmt.executeUpdate();
System.out.println("done");
}
catch(SQLException ex)
{
ex.printStackTrace();
}
finally
{
try
{
if(cstmt!=null) //close the callablestatement
{
cstmt.close();
cstmt=null;
}
}
catch(SQLException ex)
{
ex.printStackTrace();
}
try
{
if(cstmt!=null) //close the connection
{
cstmt.close();
cstmt=null;
}
}
catch(SQLException ex)
{
ex.printStackTrace();
}
}
}
}
我的错误消息是:
com.microsoft.sqlserver.jdbc.SQLServerException: The value is not set for the parameter number 1.
at com.microsoft.sqlserver.jdbc.SQLServerException.makeFromDriverError(SQLServerException.java:190)
at com.microsoft.sqlserver.jdbc.SQLServerPreparedStatement.buildParamTypeDefinitions(SQLServerPreparedStatement.java:260)
at com.microsoft.sqlserver.jdbc.SQLServerPreparedStatement.buildPreparedStrings(SQLServerPreparedStatement.java:219)
at com.microsoft.sqlserver.jdbc.SQLServerPreparedStatement.doPrepExec(SQLServerPreparedStatement.java:612)
at com.microsoft.sqlserver.jdbc.SQLServerPreparedStatement.doExecutePreparedStatement(SQLServerPreparedStatement.java:400)
at com.microsoft.sqlserver.jdbc.SQLServerPreparedStatement$PrepStmtExecCmd.doExecute(SQLServerPreparedStatement.java:350)
at com.microsoft.sqlserver.jdbc.TDSCommand.execute(IOBuffer.java:5696)
at com.microsoft.sqlserver.jdbc.SQLServerConnection.executeCommand(SQLServerConnection.java:1715)
at com.microsoft.sqlserver.jdbc.SQLServerStatement.executeCommand(SQLServerStatement.java:180)
at com.microsoft.sqlserver.jdbc.SQLServerStatement.executeStatement(SQLServerStatement.java:155)
at com.microsoft.sqlserver.jdbc.SQLServerPreparedStatement.executeUpdate(SQLServerPreparedStatement.java:314)
at com.first.mainapp.Sp.main(Sp.java:45)
如果要使用存储过程验证登录名而不是
cstmt=con.prepareCall("{? = call spLoginvalidate(@CO_ID)}");//called the procedure
试一试
您可以在此处获得更多信息:
SQL Server不知道
调用
语句。改用EXEC
。对不起,我必须如何将值编码为?意思是我必须说cs.registerOutParameter(1,Types.VARCHAR);cs.setInt(2,20)//您的@CO_ID值很抱歉,只是有点困惑
cstmt=con.prepareCall("{EXEC ? = spLoginvalidate(?)}");//called the procedure
cs.registerOutParameter(1, Types.INT);
cs.setInt(2, 1000);//your @CO_ID value here