SN/T 4899-2017 in English

Standard Background and Technological Evolution

This standard, based on GB/T 1.1-2009, provides specific requirements for Java development of information systems in the inspection and quarantine industry. As the Java ecosystem evolves from JDK 7 to JDK 11, the specification strengthens the application constraints of modern features such as modularity and type inference.

Core specification requirements

Key Technical Points

1. File Organization Specifications

Java files should be organized in the following hierarchy: package declaration → import statement → class comment → member variable → constructor → business method. Example:

package cn.finefuture.common; // Standard import groupingimport java.util.List; /** * @version 1.0 * @author 张三*/ public class InspectionService { private static final int MAX_COUNT = 100; public void validateCert(String certNo) {...} }

2. Naming and Format Control

• Package names must use reverse domain names (e.g., cn.finefuture.privilege)
• Class names use Pascal notation, and interfaces are prefixed with .
• Method parameters must be aligned within 80 characters.

/** * Certificate validity verification* @param certNo 18-digit unified encoding* @throws IllegalFormatException Thrown when the number format is incorrect*/