Java中NYTimes API的JSON解析器

我对解析JSON非常陌生，我不明白为什么我不能解析我从NYTimes API获得的JSON表单。我以为我遵循的是“响应”-->“文档”-->“web\uURL”的层次结构，但我得到了一个错误。我希望能够获得表单中的所有“web_url”

import java.io.BufferedReader;
import java.io.FileNotFoundException;
import java.io.FileReader;
import java.io.IOException;

import JSON.JSONException;
import JSON.JSONObject;


public class TestJSONParse {
    public static void main(String[] args) throws FileNotFoundException, JSONException {
        String jsonData = "";
        BufferedReader br = null;
    try {
        String line;
        br = new BufferedReader(new FileReader("/Users/Desktop/nytimes.txt"));

        while ((line = br.readLine()) != null) {
            jsonData += line + "\n";
        }
    } catch (IOException e) {
        e.printStackTrace();
    } finally {
        try {
            if (br != null)
                br.close();
        } catch (IOException ex) {
            ex.printStackTrace();
        }
    }

    JSONObject obj = new JSONObject(jsonData);

    System.out.println("nytimes:\n" + obj.getJSONObject("response").getJSONObject("docs").getString("web_url"));

}
}

以下是文件的外观部分：

{
"response": {
    "meta": {
        "hits": 21,
        "time": 361,
        "offset": 0
    },
    "docs": [{
        "web_url": "http:\/\/www.nytimes.com\/reuters\/2014\/11\/01\/world\/europe\/01reuters-ireland-politics.html",
        "snippet": "Tens of thousands of people marched in towns across Ireland on Saturday in a second day of mass protests against water charges, the biggest display of opposition to government austerity measures since the country's banking crisis and bailout in 2010....",
        "lead_paragraph": "Tens of thousands of people marched in towns across Ireland on Saturday in a second day of mass protests against water charges, the biggest display of opposition to government austerity measures since the country's banking crisis and bailout in 2010. ",
        "abstract": null,
        "print_page": null,
        "blog": [],
        "source": "Reuters",
        "multimedia": [],
        "headline": {
            "main": "Mass Water Protests Put Pressure on Irish Government",
            "print_headline": "Mass Water Protests Put Pressure on Irish Government"
        },
        "keywords": [],
        "pub_date": "2014-11-01T13:21:35Z",
        "document_type": "article",
        "news_desk": "None",
        "section_name": "World",
        "subsection_name": "Europe",
        "byline": {
            "person": [],
            "original": "By REUTERS",
            "organization": "REUTERS"
        },
        "type_of_material": "News",
        "_id": "5455176038f0d84a08fb19f9",
        "word_count": "543"
    }, {
        "web_url": "http:\/\/www.nytimes.com\/aponline\/2014\/11\/01\/world\/europe\/ap-eu-ireland-water-protests.html",
        "snippet": "Organizers say at least 100,000 people are marching against Ireland's new tax on water, a charge imposed as part of the country's successful exit from an international bailout.",
        "lead_paragraph": "Organizers say at least 100,000 people are marching against Ireland's new tax on water, a charge imposed as part of the country's successful exit from an international bailout.",
        "abstract": null,
        "print_page": null,
        "blog": [],
        "source": "AP",
        "multimedia": [],
        "headline": {
            "main": "Marchers Protest Ireland's New Tax on Water Supply",
            "print_headline": "Marchers Protest Ireland's New Tax on Water Supply"
        },
        "keywords": [],
        "pub_date": "2014-11-01T10:58:03Z",
        "document_type": "article",
        "news_desk": "None",
        "section_name": "World",
        "subsection_name": "Europe",
        "byline": {
            "person": [],
            "original": "By THE ASSOCIATED PRESS",
            "organization": "THE ASSOCIATED PRESS"
        },
        "type_of_material": "News",
        "_id": "5454f5aa38f0d839202eac78",
        "word_count": "128"
    }
}

这就是我得到的错误：

Exception in thread "main" JSON.JSONException: Missing value at 1 [character 2 line 1]
at JSON.JSONTokener.syntaxError(JSONTokener.java:433)
at JSON.JSONTokener.nextValue(JSONTokener.java:388)
at JSON.JSONObject.<init>(JSONObject.java:207)
at JSON.JSONObject.<init>(JSONObject.java:323)
at TestJSONParse.main(TestJSONParse.java:38)

线程“main”JSON.JSONException中的异常：1处缺少值[字符2第1行] 位于JSON.JSONTokener.syntaxError（JSONTokener.java:433） 位于JSON.JSONTokener.nextValue（JSONTokener.java:388） 在JSON.JSONObject.（JSONObject.java:207） 位于JSON.JSONObject。（JSONObject.java:323） 位于TestJSONParse.main（TestJSONParse.java:38）

---

打印JSONData并确保它看起来正常。此外，可能是文件开头有一个字节顺序标记被读取序列弄乱了，或者解析器不明白如何处理。当我打印JSONData时，我在表单前面看到了这个标记，这可能是您描述的被读取序列弄乱的：{\rtf1\ansi\ansicpg1252\cooart1265\cocooasubrtf210{\fonttbl\f0\fmodern\fcharset0 Courier；}{\colortbl；\red255\green255\blue255；}\margl1440\margr1440\vieww10800\viewh8400\viewkind0\deftab720\pard\pardeftab720\f0\fs24\cf0\。在这种情况下我该怎么办？这是您正在使用的解析器吗？（来自json.org？）不，那不是BOM（只有2-3个字节），这是垃圾。您的下载操作有问题。我认为您的下载操作没有为您提供有效的json。我能够获取您的原始输入字符串（预编辑），并使用我在前面的注释中链接的解析器对其进行解析。