public static String tableName(String fieldFullyQualifiedName) {
        if (fieldFullyQualifiedName.contains(".")) {
            return fieldFullyQualifiedName.substring(0, fieldFullyQualifiedName.indexOf("."));
        }
        return null;
    }
public static String tableName(String fieldFullyQualifiedName) {
        if (fieldFullyQualifiedName.contains(".")) {
            return fieldFullyQualifiedName.substring(0, fieldFullyQualifiedName.indexOf("."));
        }
        return null;
    }
public static String tableName ( String fieldFullyQualifiedName ) { if ( fieldFullyQualifiedName . contains ( "." ) ) { return fieldFullyQualifiedName . substring ( 0 , fieldFullyQualifiedName . indexOf ( "." ) ) ; } return null ; }
从完全标识字段名获取表名

@param fieldFullyQualifiedName fieldFullyQualifiedName
@return tableName
从完全标识字段名获取表名