如何将对象从java类传递给servlet？ [英] How to pass an object from a java class to servlet?

问题描述

我正在使用Apache的HttpClient从Java类调用servlet。我想向servlet发送一个对象，该对象应使用Serialization保存对象。如何将对象发送到servlet？

I am using Apache's HttpClient to call a servlet from a Java class. I want to send an object to the servlet which should save the object using Serialization. How to send the object to the servlet?

public static void main(String[] args) {

        Names names = new Names();
        names.setName("ABC");
        names.setPlace("Bangalore");
        HttpClient httpclient = new DefaultHttpClient();
        HttpGet httpget = new HttpGet("http://localhost:9080/HttpClientPractice/FirstServlet");
//Rest of the code

在上面的代码片段中，我有另一个类Names我想将一个Names对象发送到servlet。现在我只用URI调用servlet，但我想传递对象。

In the above code snippet, I have another class Names and I want to send an object of Names to the servlet. Right now I am only calling the servlet with the URI, but I want to pass the object.

谢谢！

推荐答案

使用像已经显示的类中的Gson 并将此字符串添加为查询参数 - 向您展示如何使用Gson。

Convert the object to a Json String using a Library like Gson in the class you have shown and add this string as a query parameter - showing you how to do it with Gson.

Gson gson = new Gson();
String json = gson.toJson(names);
HttpGet httpget = new HttpGet("http://localhost:9080/HttpClientPractice/FirstServlet?obj="+json);

在您要存储此对象的类中，执行fromJson（Gson库中的方法）

In the class you are going to store this object, do a fromJson (method in the Gson library)

Gson gson = new Gson();
Names names = fromJson(json, Names.class);

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