Java 如何将从Http请求接收到的数据放入数组？

我需要将post请求数据插入数组。我将获得三组JSON信息，并希望将每个JSON结果插入一个字符串数组中。这是我目前使用的代码

URL url = new URL("http://localhost:9090/service.php");
URLConnection conn = url.openConnection();
conn.setDoOutput(true);
OutputStreamWriter writer = new OutputStreamWriter(conn.getOutputStream());
BufferedReader reader = new BufferedReader(new InputStreamReader(conn.getInputStream()));
StringBuffer response = new StringBuffer();
int i = 0;
ArrayList<String> arr = new ArrayList<String>();
while ((line = reader.readLine()) != null) {
        response.append(line);
        arr.add(response.toString());
        System.out.println(arr.get(i));
        i++;
    }

此代码输出如下：

abc
abcdef
abcdefghi

但我需要像输入一样的输出。

移动

StringBuffer response = new StringBuffer();

---

到“while”块的第一行

更改arr.addresponse.toString；到arr.addline；它可以工作。

您还没有重新初始化StringBuffer变量响应。此外，您实际上不需要使用StringBuffer，因为您没有操作字符串信息。我建议您尝试以下方法，但在某些情况下您可能不想使用localhost：

URL url = new URL("http://localhost:9090/service.php");
URLConnection conn = url.openConnection();
conn.setDoOutput(true);
OutputStreamWriter writer = new OutputStreamWriter(conn.getOutputStream());
BufferedReader reader = new BufferedReader(new InputStreamReader(conn.getInputStream()));
int i = 0;
ArrayList<String> arr = new ArrayList<String>();
while ((line = reader.readLine()) != null) {
   arr.add(line);
   // debug information
   System.out.println(arr.get(i));
   i++;
}

URL url = new URL("http://localhost:9090/service.php");
URLConnection conn = url.openConnection();
conn.setDoOutput(true);
OutputStreamWriter writer = new OutputStreamWriter(conn.getOutputStream());
BufferedReader reader = new BufferedReader(new InputStreamReader(conn.getInputStream()));
int i = 0;
ArrayList<String> arr = new ArrayList<String>();
while ((line = reader.readLine()) != null) {
   arr.add(line);
   // debug information
   System.out.println(arr.get(i));
   i++;
}