User user1 = new User();
user1.setName("Alyssa");
user1.setFavoriteNumber(256);
// Leave favorite col or null
// Alternate constructor
User user2 = new User("Ben", 7, "red");
// Construct via builder
User user3 = User.newBuilder()
.setName("Charlie")
.setFavoriteColor("blue")
.setFavoriteNumber(null)
.build();
// Serialize user1, user2 and user3 to disk
DatumWriter userDatumWriter = new SpecificDatumWriter(User.class);
DataFileWriter dataFileWriter = new DataFileWriter(userDatumWriter);
dataFileWriter.create(user1.getSchema(), new File("user_generic.avro"));
dataFileWriter.append(user1);
dataFileWriter.append(user2);
dataFileWriter.append(user3);
dataFileWriter.close();
// Deserialize Users from disk
DatumReader userDatumReader = new SpecificDatumReader(User.class);
DataFileReader dataFileReader = new DataFileReader(new File("user_generic.avro"), userDatumReader);
User user = null;
while (dataFileReader.hasNext()) {
// Reuse user object by passing it to next(). This saves us from
// allocating and garbage collecting many objects for files with
// many items.
user = dataFileReader.next(user);
System.out.println(user);
}
本专题系统讲解 C++ 在单元测试与代码质量保障方面的实战方法，包括测试驱动开发理念、Google Test/Google Mock 的使用、测试用例设计、边界条件验证、持续集成中的自动化测试流程，以及常见代码质量问题的发现与修复。通过工程化示例，帮助开发者建立 可测试、可维护、高质量的 C++ 项目体系。
