java - 如何在 Java 中发布 JSON 字符串

Question

我正在尝试发布一个包含推文的大型 JSON 字符串。其中一些推文包含双引号和许多特殊字符。我需要对 JSON 字符串进行编码吗？如果推文中没有特殊字符或双引号，我的代码就可以工作，否则我不会得到响应。

String jsonString = "{'data': [";

for (Tweet tweet : tweets) {
    jsonString +="{'text': '" + tweet.getText() + "'},";
} 
jsonString += "]}";

public void analyseTweets(String jsonString){
        try {
            // Send data
            URL url = new URL("http://twittersentiment.appspot.com/api/bulkClassifyJson");
            URLConnection conn = url.openConnection();
            conn.setDoOutput(true);
            OutputStreamWriter wr = new OutputStreamWriter(conn.getOutputStream());
            wr.write(jsonString);
            wr.flush();

            // Get the response
            BufferedReader rd = new BufferedReader(new InputStreamReader(conn.getInputStream()));
            String line;
            while ((line = rd.readLine()) != null) {
                System.out.println(line);
            }
            wr.close();
            rd.close();
        } catch (Exception e) {
            System.out.print("Error dude!: " + e);
        }
    }

Answer 1

为什么不使用外部库，例如 google-gson为您处理 JSON 编码？

来自项目描述:

Gson is a Java library that can be used to convert Java Objects into their JSON representation. It can also be used to convert a JSON string to an equivalent Java object. Gson can work with arbitrary Java objects including pre-existing objects that you do not have source-code of.