SQL Server imports and exports bulk data through BCP

Preconditions:

Use the sa account to log in to SQL Server Management Studio, right-click Security - Login Name - Database Username Properties, and set the server role to sysadmin.

delete an existing stored procedure

String JOB_BCP_DELETE_SQL = “IF EXISTS (SELECT * FROM sys.objects WHERE name = 'PROCEDURE_BCP_OUT' AND type in (N'P', N'PC'))\n DROP PROCEDURE PROCEDURE_BCP_OUT \n”；
pre = conn.prepareStatement(JOB_BCP_DELETE_SQL);
pre.execute();

Create stored procedure

String sql = "set @sql = N'BCP ' + @tableName + ' out ' + @filePath + ' -c -t -U \"' + @userName + '\" -P \"' + @password + '\" -S \"' + @dbIp + '\"'\n";
StringBuffer createSqlBuf = new StringBuffer();
createSqlBuf.append("CREATE PROCEDURE PROCEDURE_BCP_OUT \n")
    .append("@dbIp nvarchar(256),\n")
    .append("@userName nvarchar(256),\n")
    .append("@password nvarchar(256),\n")
    .append("@tableName nvarchar(256),\n")
    .append("@filePath nvarchar(256)\n")
    .append("AS\n")
    .append("BEGIN\n")
    .append("EXEC master.sys.sp_configure 'show advanced options', 1\n")
    .append("RECONFIGURE\n")
    .append("EXEC master.sys.sp_configure 'xp_cmdshell', 1\n")
    .append("RECONFIGURE\n")
    .append("declare @sql nvarchar(256)\n")
    .append(sql)
    .append("EXEC master..xp_cmdshell @sql\n")
    .append("EXEC master.sys.sp_configure 'show advanced options', 1\n")
    .append("RECONFIGURE\n")
    .append("EXEC master.sys.sp_configure 'xp_cmdshell', 0\n")
    .append("RECONFIGURE\n")
    .append("END");
String createSql = createSqlBuf.toString();
pre = conn.prepareStatement(createSql);
pre.execute();

execute stored procedure

StringBuffer execSqlBuf = new StringBuffer();
execSqlBuf.append("EXECUTE PROCEDURE_BCP_OUT \n")
    .append("@dbIp=?, ").append("@userName=?, ").append("@password=?, ")
    .append("@tableName=?, ").append("@filePath=?");
String execSql = execSqlBuf.toString(); 
pre = conn.prepareStatement(execSql);
pre.setString(1, dbIp);
pre.setString(2, dbUserName);
pre.setString(3, dbPassword);
pre.setString(4, tableName);
pre.setString(5, file);
pre.execute();