Java 在服务器端正确生成Json字符串时，客户端接收到错误的Json字符串

我正在开发一个服务器客户端应用程序。对于部分请求，我需要在服务器端生成一段Json字符串并将其发送给客户端。根据服务器日志，在服务器端正确生成了Json字符串。但在Android客户端，字符串已更改，无法解析为正确的Json字符串

下面是一些相关代码

在服务器端生成Json字符串：

@RequestMapping(value="/resourceList/{actType}/{type}/{id}")
@ResponseBody public Object personList(@PathVariable int actType, @PathVariable int type, @PathVariable int id){
    ArrayList<ItemBase> list = new ArrayList(); 
    ......
    return new ArrayList();
}

并在Android客户端上接收：

......
HttpURLConnection urlConnection = null;
try {
    URL url = new URL(request);
    urlConnection = (HttpURLConnection) url.openConnection();
    InputStream in = new BufferedInputStream(urlConnection.getInputStream());
    byte[] buffer = new byte[256];
    int len = 0;
    StringBuilder responseBuilder = new StringBuilder();
    while ((len = in.read(buffer)) != -1) {
        String str = new String(buffer, "utf-8");
        responseBuilder.append(str);
    }
    String response = responseBuilder.toString().trim();

响应变量的值为：

[{"countryID":1,"locationID":5,"siteID":5,"brief":"halik","userID":0,"status":"normal","rank":0.0,"id":3,"timestamp":1471495034000,"displayName":"halik","pic":"3.jpg","actType":1,471494991000,"displayName":"shark point","pic":"2.jpg","actType":1,"type":64},{"countryID":1,"locationID":5,"siteID":5,"brief":"halik","userID":0,"status":"normal","rank":0.0,"id":3,"timestamp":1471495034000,""type":64}]":"halik","pic":"3.jpg","actType":1,471494991000,"displayName":"shark point","pic":"2.jpg","actType":1,"type":64},{"countryID":1,"locationID":5,"siteID":5,"brief":"halik","userID":0,"status":"normal","rank":0.0,"id":3,"timestamp":1471495034000,"

无法将其正确解析为Json字符串，并出现明显错误

---

除此之外，大多数向客户机请求返回Json字符串的方法都可以正常工作。但这种方法的实现几乎与那些正确工作的方法完全相同。因此，我完全不知道这是怎么发生的。任何人都有任何提示，请帮助。

您正在以错误的方式构建

字符串

请尝试以下方法：

    // …

    HttpURLConnection urlConnection = null;
    try {
        URL url = new URL(request);
        urlConnection = (HttpURLConnection) url.openConnection();

        InputStream in = new BufferedInputStream(urlConnection.getInputStream());
        BufferedInputStream bis = new BufferedInputStream(in);
        ByteArrayOutputStream buf = new ByteArrayOutputStream();

        int result = bis.read();
        while(result != -1) {
            buf.write((byte) result);
            result = bis.read();
        }

        String response = buf.toString();

    // …

如果
len
小于
buffer
size怎么办？这就是为什么我必须调用String.trim（）方法。做一些研究
bis.read（）
即使使用缓冲输入，速度也很慢（与使用缓冲区的读取相比），这很有帮助，谢谢Hadi。但是似乎Selvin是对的，BufferedInputStream.read（）方法每次调用只读取一个字节，这很慢。除了这个，我们还有更好的办法吗？
    // …

    HttpURLConnection urlConnection = null;
    try {
        URL url = new URL(request);
        urlConnection = (HttpURLConnection) url.openConnection();

        InputStream in = new BufferedInputStream(urlConnection.getInputStream());
        BufferedInputStream bis = new BufferedInputStream(in);
        ByteArrayOutputStream buf = new ByteArrayOutputStream();

        int result = bis.read();
        while(result != -1) {
            buf.write((byte) result);
            result = bis.read();
        }

        String response = buf.toString();

    // …