字符串 开发基于protostuff编解码技术的Netty程序：传输pojo对象(7)

package cn.xpleaf.protostuff.netty.pojo;

public class User {
    private String name;
    private int age;

    public User() {

    }

    public User(String name, int age) {
        this.name = name;
        this.age = age;
    }

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public int getAge() {
        return age;
    }

    public void setAge(int age) {
        this.age = age;
    }

    @Override
    public String toString() {
        return "User [name=" + name + ", age=" + age + "]";
    }

}

分别执行EchoServer.java和EchoClient.java，服务端和客户端输出如下：

服务端：

4b76d70d-7a31-4738-8daa-ca4f40483e7e : User [name=client, age=10]

客户端：

e40b6e34-33a3-485e-bb8f-7157ee324e97 : User [name=server, age=10]

<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>
    <groupId>cn.xpleaf</groupId>
    <artifactId>Chapter08</artifactId>
    <version>0.0.1-SNAPSHOT</version>

    <dependencies>
        <!-- https://mvnrepository.com/artifact/com.google.protobuf/protobuf-java -->
        <dependency>
            <groupId>com.google.protobuf</groupId>
            <artifactId>protobuf-java</artifactId>
            <version>3.5.1</version>
        </dependency>
        <!-- https://mvnrepository.com/artifact/io.netty/netty-all -->
        <dependency>
            <groupId>io.netty</groupId>
            <artifactId>netty-all</artifactId>
            <version>4.1.21.Final</version>
        </dependency>
        <!-- https://mvnrepository.com/artifact/com.dyuproject.protostuff/protostuff-core -->
        <dependency>
            <groupId>com.dyuproject.protostuff</groupId>
            <artifactId>protostuff-core</artifactId>
            <version>1.1.3</version>
        </dependency>
        <!-- https://mvnrepository.com/artifact/com.dyuproject.protostuff/protostuff-runtime -->
        <dependency>
            <groupId>com.dyuproject.protostuff</groupId>
            <artifactId>protostuff-runtime</artifactId>
            <version>1.1.3</version>
        </dependency>
    </dependencies>
    <build>
        <plugins>
            <!-- java编译插件 -->
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-compiler-plugin</artifactId>
                <version>3.2</version>
                <configuration>
                    <source>1.8</source>
                    <target>1.8</target>
                    <encoding>UTF-8</encoding>
                </configuration>
            </plugin>
        </plugins>
    </build>
</project>

上面其实传输的对象是EchoRequest和EchoResponse，虽然其中封装了返回的对象，但由于其定义的类型为Object类型，在上面的例子当中，其实际上是一个User对象，在这个简单的例子当中是可以通过类型转换来进行向下转型的，但实际使用时，封装的Object对象不一定是User对象，但又需要做向下转型，该如何解决这个问题呢？通过动态代理技术可以解决这个问题，后面会进一步改进这个例子使其更具有通用性。字符串

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