传参数无返回值的 java 调oracle的存储过程.(向数据库表中插入数据)

import java.sql.CallableStatement;
import java.sql.Connection;
import java.sql.DriverManager;

public class JavaOracleProcedure1 {
    
    JavaOracleProcedure1()throws Exception
    {
        String driver="oracle.jdbc.driver.OracleDriver";
        String url="jdbc:oracle:thin:@localhost:1521:WJDB";
        String strUser="wjorac";
        String strPwd="wangjun";
        Connection conn=null;
        CallableStatement cstm=null;

        try{
        Class.forName(driver);
        conn=DriverManager.getConnection(url,strUser,strPwd);
        cstm=conn.prepareCall("{call TEST_PRO(?,?)}");
        //
        //
        cstm.setString(1,"200");
        cstm.setString(2,"wangjun2");
        cstm.executeUpdate();
        }
        catch(Exception ex)
        {
            ex.printStackTrace();
        }
        finally
        {
            if(cstm!=null)
                cstm.close();
            if(conn!=null)
                conn.close();
        }
    }
    public static void main(String args[])throws Exception
    {
            new JavaOracleProcedure1();
    }
}