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Protostuff怎么使用

  首先,引入maven依赖如下:

  <dependency>

  <groupId>io.protostuff</groupId>

  <artifactId>protostuff-core</artifactId>

  <version>1.4.4</version>

  </dependency>

  <dependency>

  <groupId>io.protostuff</groupId>

  <artifactId>protostuff-runtime</artifactId>

  <version>1.4.4</version>

  </dependency>

  之后,编写序列化工具Util:

  public class SerializeUtil {

  private static class SerializeData{

  private Object target;

  }

  @SuppressWarnings("unchecked")

  public static byte[] serialize(Object object) {

  SerializeData serializeData = new SerializeData();

  serializeData.target = object;

  Class<SerializeData> serializeDataClass = (Class<SerializeData>) serializeData.getClass();

  LinkedBuffer linkedBuffer = LinkedBuffer.allocate(1024 * 4);

  try {

  Schema<SerializeData> schema = RuntimeSchema.getSchema(serializeDataClass);

  return ProtostuffIOUtil.toByteArray(serializeData, schema, linkedBuffer);

  } catch (Exception e) {

  throw new IllegalStateException(e.getMessage(), e);

  } finally {

  linkedBuffer.clear();

  }

  }

  @SuppressWarnings("unchecked")

  public static <T> T deserialize(byte[] data, Class<T> clazz) {

  try {

  Schema<SerializeData> schema = RuntimeSchema.getSchema(SerializeData.class);

  SerializeData serializeData = schema.newMessage();

  ProtostuffIOUtil.mergeFrom(data, serializeData, schema);

  return (T) serializeData.target;

  } catch (Exception e) {

  throw new IllegalStateException(e.getMessage(), e);

  }

  }

  }

  需要注意的是RuntimeSchema.getSchema这块代码,通过翻看源码可以知道,里面已经放置了一个缓存map帮我们缓存生成的内容,所以不需要自己再加缓存了。

  由于protostuff目前不支持序列化list等对象,所以需要使用普通的POJO包装一下。

  最后,来写一个测试吧:

  public static void main(String&hellip;args) throws Exception {

  User user = new User();

  user.setUserId(123456);

  user.setAddress("I am a good boy");

  user.setNote("this is test");

  List<String> list = new ArrayList<>();

  list.add("record1");

  list.add("record2");

  list.add("record3");

  user.setRecords(list);

  Teacher teacher1 = new Teacher();

  teacher1.setName("语文老师");

  Teacher teacher2 = new Teacher();

  teacher2.setName("数学老师");

  List<Teacher> teachers = new ArrayList<>();

  teachers.add(teacher1);

  teachers.add(teacher2);

  user.setTeachers(teachers);

  byte[] b = serialize(user);

  User rst = deserialize(b, User.class);

  System.out.println(JSON.toJSONString(rst));

  }

  class User {

  private Integer userId;

  private String address;

  private String note;

  private List<String> records;

  private List<Teacher> teachers;

  public Integer getUserId() {

  return userId;

  }

  public void setUserId(Integer userId) {

  this.userId = userId;

  }

  public String getAddress() {

  return address;

  }

  public void setAddress(String address) {

  this.address = address;

  }

  public String getNote() {

  return note;

  }

  public void setNote(String note) {

  this.note = note;

  }

  public List<String> getRecords() {

  return records;

  }

  public void setRecords(List<String> records) {

  this.records = records;

  }

  public List<Teacher> getTeachers() {

  return teachers;

  }

  public void setTeachers(List<Teacher> teachers) {

  this.teachers = teachers;

  }

  }

  class Teacher{

  private String name;

  public String getName() {

  return name;

  }

  public void setName(String name) {

  this.name = name;

  }

  }

  最终的运行结果如下:

  {"address":"I am a good boy","note":"this is test","records":["record1","record2","record3"],"teachers":[{"name":"语文老师"},{"name":"数学老师"}],"userId":123456}

本文标题:Protostuff怎么使用
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