<dependency> <groupId>io.protostuff</groupId> <artifactId>protostuff-core</artifactId> <version>1.5.9</version> </dependency> <dependency> <groupId>io.protostuff</groupId> <artifactId>protostuff-runtime</artifactId> <version>1.5.9</version> </dependency> <dependency> <groupId>io.protostuff</groupId> <artifactId>protostuff-api</artifactId> <version>1.5.9</version> </dependency>
这里是User.java(成员属性包含了其它类)
package demo.protostuff; import java.util.List; public class User { private String firstName; private String lastName; private String email; private List<User> friends; private List<Car> cars; public User() { } public User(String email) { this.email = email; } // getters and setters public String getFirstName() { return firstName; } public void setFirstName(String firstName) { this.firstName = firstName; } public String getLastName() { return lastName; } public void setLastName(String lastName) { this.lastName = lastName; } public String getEmail() { return email; } public void setEmail(String email) { this.email = email; } public List<User> getFriends() { return friends; } public void setFriends(List<User> friends) { this.friends = friends; } public List<Car> getCars() { return cars; } public void setCars(List<Car> cars) { this.cars = cars; } @Override public String toString() { return "User{" + "firstName='" + firstName + '/'' + ", lastName='" + lastName + '/'' + ", email='" + email + '/'' + ", friends=" + friends + ", cars=" + cars + '}'; } }
package demo.protostuff; public class Car { private String color; private String car_name; private Integer price; public String getColor() { return color; } public void setColor(String color) { this.color = color; } public String getCar_name() { return car_name; } public void setCar_name(String car_name) { this.car_name = car_name; } public Integer getPrice() { return price; } public void setPrice(Integer price) { this.price = price; } public Car(String car_name) { super(); this.car_name = car_name; } public Car() { super(); } @Override public String toString() { return "Car [color=" + color + ", car_name=" + car_name + ", price=" + price + "]"; } }
这里是App.java
package demo.protostuff; import java.util.ArrayList; import java.util.List; import io.protostuff.LinkedBuffer; import io.protostuff.ProtostuffIOUtil; import io.protostuff.runtime.RuntimeSchema; public class App { private static RuntimeSchema<User> schema = RuntimeSchema.createFrom(User.class); public static void main(String[] args) { User user1 = new User(); user1.setEmail("10000@qq.com"); user1.setFirstName("zhang"); user1.setLastName("sanfeng"); List<User> users = new ArrayList<>(); users.add(new User("20000@qq.com")); user1.setFriends(users); Car car1 = new Car("宾利"); Car car2 = new Car("法拉利"); List<Car> cars = new ArrayList<>(); cars.add(car1); cars.add(car2); user1.setCars(cars); byte[] bytes = ProtostuffIOUtil.toByteArray(user1, schema, LinkedBuffer.allocate(LinkedBuffer.DEFAULT_BUFFER_SIZE)); User user2 = schema.newMessage(); ProtostuffIOUtil.mergeFrom(bytes, user2, schema); System.out.println(user2); System.out.println(); // 使用自定义的工具类 byte[] bytes1 = ProtostuffUtil.serializer(user1); User newUser = ProtostuffUtil.deserializer(bytes1, User.class); System.out.println(newUser); } }
程序说明:
执行程序,输出如下:
User{firstName=’zhang’, lastName=’sanfeng’, email=’10000@qq.com’, friends=[User{firstName=’null’, lastName=’null’, email=’20000@qq
.com’, friends=null, cars=null}], cars=[Car [color=null, car_name=宾利, price=null], Car [color=null, car_name=法拉利, price=null]]}
User{firstName=’zhang’, lastName=’sanfeng’, email=’10000@qq.com’, friends=[User{firstName=’null’, lastName=’null’, email=’20000@qq
.com’, friends=null, cars=null}], cars=[Car [color=null, car_name=宾利, price=null], Car [color=null, car_name=法拉利, price=null]]}
这里是ProtostuffUtil.java
package demo.protostuff; import java.util.Map; import java.util.concurrent.ConcurrentHashMap; import io.protostuff.LinkedBuffer; import io.protostuff.ProtostuffIOUtil; import io.protostuff.Schema; import io.protostuff.runtime.RuntimeSchema; public class ProtostuffUtil { private static Map<Class<?>, Schema<?>> cachedSchema = new ConcurrentHashMap<Class<?>, Schema<?>>(); private static <T> Schema<T> getSchema(Class<T> clazz) { @SuppressWarnings("unchecked") Schema<T> schema = (Schema<T>) cachedSchema.get(clazz); if (schema == null) { schema = RuntimeSchema.getSchema(clazz); if (schema != null) { cachedSchema.put(clazz, schema); } } return schema; } /** * 将对象序列化 * @param obj 对象 * @return */ public static <T> byte[] serializer(T obj) { @SuppressWarnings("unchecked") Class<T> clazz = (Class<T>) obj.getClass(); LinkedBuffer buffer = LinkedBuffer.allocate(LinkedBuffer.DEFAULT_BUFFER_SIZE); try { Schema<T> schema = getSchema(clazz); return ProtostuffIOUtil.toByteArray(obj, schema, buffer); } catch (Exception e) { throw new IllegalStateException(e.getMessage(), e); } finally { buffer.clear(); } } /** * 将字节数组数据反序列化 * @param data 字节数组 * @param clazz 对象 * @return */ public static <T> T deserializer(byte[] data, Class<T> clazz) { try { T obj = clazz.newInstance(); Schema<T> schema = getSchema(clazz); ProtostuffIOUtil.mergeFrom(data, obj, schema); return obj; } catch (Exception e) { throw new IllegalStateException(e.getMessage(), e); } } }