网页获取数据内容中字符串为问号"?"_javascript获取页面文本值为问号-优快云博客

本文链接：https://blog.youkuaiyun.com/android_gril/article/details/77059378

在爬取网页时遇到JSON数据中字符串显示为问号的状况，通过在HTTP请求头中添加""Accept: application/json, text/javascript, */*; q=0.01""解决了该问题，确保了数据正确解码。代码示例使用了OkHttpClient库进行网络请求。" 103238457,7467746,Java处理多层for循环中的null值问题,"['Java', '多层for循环', '空值处理']

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爬取网页时，获取的json数据中，字符串都是问号，如下图

尝试修改编码格式为utf-8,gbk等，都不行，后来给header加accept后编码格式正确，问号转换字符串成功

Request request = new Request.Builder()
.url(url)
.header("Accept", "application/json, text/javascript, */*; q=0.01")
.build();

主要代码如下

package com.msun.util.webConnect;

import java.io.File;
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;
import net.sf.json.JSONArray;
import net.sf.json.JSONObject;
import okhttp3.OkHttpClient;
import okhttp3.Request;
import okhttp3.Response;
import com.msun.util.FileUtil;

public class CreditchinaUtil {

public static void main(String[] args) {

String url="http://www.baidu.com"
//获取信息
getCreditInfo(url);

}

private static void getCreditInfo(String url) {
// TODO Auto-generated method stub
OkHttpClient okHttpClient = new OkHttpClient();
Request request = new Request.Builder()
.url(url)
.header("Accept", "application/json, text/javascript, */*; q=0.01")
.build();
try {
Response response = okHttpClient.newCall(request).execute();
if (response.isSuccessful()) {
String json = response.body().string();
JSONArray jsonArray = JSONArray.fromObject(json);
System.out.println(jsonArray.size());
for (Object object : jsonArray) {
String number = (String) JSONObject.fromObject(object).get("CARDNUMBER");

}
}
} catch (IOException e) {
e.printStackTrace();
}
}

}

}