如何正确序列化/反序列化 Java Object[]？

Question

我正在编写一个 rpc 框架，但面临有关序列化的问题。

你知道在客户端和服务器之间转换请求，我应该有一个这样的请求类：

class Request {

    // target service class

    private Class<?> targetService;

    // target service method

    private String targetMethod;

    // target method param types

    private Class<?>[] targetParamTypes;

    // the params

    private Object[] targetParams;

    // getters & setters & contructors

}

但：

1. 对于该targetParams领域，如果我使用 Gson 作为序列化工具，com.google.gson.internal.LinkedTreeMap cannot be cast to the.packages.to.MyClass如果我将 POJO 放入 中targetParams，对于通用问题，它会出错。

2. 对于int类，Gson 总是将其解析为 a Double，所以我不能使用targetParamTypes[i].cast(targetParams[i])强制将其强制转换为 Integer（Double 不能转换为 Integer），它很糟糕...

那么有人有解决问题的方法吗？如何使序列化/反序列化步骤快速准确？或者有什么推荐的工具吗？

我努力了：

• Gson，之前遇到的问题

• Kyro，编解码器系统很烂，我不知道如何序列化/反序列化 HashMap ......

• protostuff，嗯，它不支持 Java 9+，我的环境是 Java 11，糟糕！

所以有什么建议吗？

Answer 1

你可以看看杰克逊。Jackson'sObjectMapper应该能够从您的Request对象转换为String，反之亦然。编辑：添加示例请求实体：class Request {&nbsp; &nbsp; private Class<?> targetService;&nbsp; &nbsp; private String targetMethod;&nbsp; &nbsp; private Class<?>[] targetParamTypes;&nbsp; &nbsp; private Object[] targetParams;&nbsp; &nbsp; // needed by Jackson&nbsp; &nbsp; private Request(){&nbsp; &nbsp; }&nbsp; &nbsp; public Request(Class<?> targetService,&nbsp;&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;String targetMethod,&nbsp;&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;Class<?>[] targetParamTypes,&nbsp;&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;Object[] targetParams) {&nbsp; &nbsp; &nbsp; &nbsp; this.targetService = targetService;&nbsp; &nbsp; &nbsp; &nbsp; this.targetMethod = targetMethod;&nbsp; &nbsp; &nbsp; &nbsp; this.targetParamTypes = targetParamTypes;&nbsp; &nbsp; &nbsp; &nbsp; this.targetParams = targetParams;&nbsp; &nbsp; }&nbsp; &nbsp; // getters and setters, needed by Jackson}序列化/反序列化示例：public static void main(String[] args) throws IOException {&nbsp; &nbsp; ObjectMapper mapper = new ObjectMapper();&nbsp; &nbsp; Request req = new Request(String.class, "test", new Class[] {String.class}, new Object[] {"Test"});&nbsp; &nbsp; String serialized = mapper.writeValueAsString(req);&nbsp; &nbsp; System.out.println(serialized);&nbsp; &nbsp; req = mapper.readValue(serialized, Request.class);&nbsp; &nbsp; System.out.println(req);}

Answer 2

使用 JSON 而不是 GSON 并在你的 pojo 中实现 Serializable