java获取这个网址的json数据并解析http://www.yemaxgo.com/connect.php
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求java通过http请求获取json数据的demo
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志行千里者 2018-08-12 07:53关注package com.binjava.test;
import java.io.BufferedReader;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.net.HttpURLConnection;
import java.net.URL;
import com.google.gson.JsonArray;
import com.google.gson.JsonObject;
import com.google.gson.JsonParser;public class MainFrame{
public static void main(String[] args) { HttpURLConnection connection = null; InputStream is = null; BufferedReader br = null; String result = null; try { URL url = new URL("http://www.yemaxgo.com/connect.php"); connection = (HttpURLConnection) url.openConnection(); connection.setRequestMethod("GET"); connection.setConnectTimeout(15000); connection.setReadTimeout(60000); connection.connect(); if (connection.getResponseCode() == 200) { is = connection.getInputStream(); br = new BufferedReader(new InputStreamReader(is, "UTF-8")); StringBuffer sbf = new StringBuffer(); String temp = null; while ((temp = br.readLine()) != null) { sbf.append(temp); sbf.append("\r\n"); } result = sbf.toString(); result = "{1:"+result+"}";//不是严格的JSON数据格式,补成标准的json数据格式 JsonParser jParser = new JsonParser(); JsonObject jt = (JsonObject) jParser.parse(result); JsonArray jArray = jt.get("1").getAsJsonArray(); JsonObject subObject=jArray.get(0).getAsJsonObject(); System.out.println("id值为:"+subObject.get("id").getAsInt()); System.out.println("speed值为:"+subObject.get("speed").getAsInt()); System.out.println("pm25为:"+subObject.get("pm25").getAsInt()); System.out.println("temperature(温度)为:"+subObject.get("temperature").getAsInt()); System.out.println("humidity值为:"+subObject.get("humidity").getAsInt()); System.out.println("temperature_warning值为:"+subObject.get("temperature_warning").getAsInt()); System.out.println("gas_warning值为:"+subObject.get("gas_warning").getAsInt()); System.out.println("humidity_warning值为:"+subObject.get("humidity_warning").getAsInt()); System.out.println("lowpower_warning值为:"+subObject.get("lowpower_warning").getAsInt()); System.out.println("mode值为:"+subObject.get("mode").getAsInt()); System.out.println("timing_hour值为:"+subObject.get("timing_hour").getAsInt()); System.out.println("timing_minute值为:"+subObject.get("timing_minute").getAsInt()); System.out.println("timing_second值为:"+subObject.get("timing_second").getAsInt()); System.out.println("update_time值为:"+subObject.get("update_time").getAsString()); subObject=jArray.get(1).getAsJsonObject(); System.out.println("time值为:"+subObject.get("time").getAsString()); } }catch (Exception e) { // TODO: handle exception e.printStackTrace(); }
}
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志行千里者 2018-08-12 08:05关注代码需要导入gson模块包
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devmiao 2018-08-12 15:43关注public static void temp(String isbn) throws IOException{
// 我们需要进行请求的地址:
String temp = "https://api.douban.com/v2/book/isbn/" + isbn;
try {
// 1.URL类封装了大量复杂的实现细节,这里将一个字符串构造成一个URL对象
URL url = new URL(temp);
// 2.获取HttpURRLConnection对象
HttpURLConnection connection = (HttpURLConnection)url.openConnection();
// 3.调用connect方法连接远程资源
connection.connect();
// 4.访问资源数据,使用getInputStream方法获取一个输入流用以读取信息
BufferedReader bReader = new BufferedReader(
new InputStreamReader(connection.getInputStream(), "UTF-8"));// 对数据进行访问 String line = null; StringBuilder stringBuilder = new StringBuilder(); while ((line = bReader.readLine()) != null) { stringBuilder.append(line); } // 关闭流 bReader.close(); // 关闭链接 connection.disconnect(); // 打印获取的结果 System.out.println(stringBuilder.toString()); } catch (MalformedURLException e) { e.printStackTrace(); } }
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batter少年 2018-08-13 00:51关注import java.io.BufferedReader; import java.io.InputStream; import java.io.InputStreamReader; import java.net.HttpURLConnection; import java.net.URL; import java.util.Iterator; import java.util.Map.Entry; import com.google.gson.JsonArray; import com.google.gson.JsonElement; import com.google.gson.JsonObject; import com.google.gson.JsonParser; public class JsonDemo { /** * 打印json信息 * @param jsonStr json字符串 * @throws Exception */ public static void printJson(String jsonStr) throws Exception { JsonParser jsonParser = new JsonParser(); JsonArray jsonArray = (JsonArray) jsonParser.parse(jsonStr); for (int i = 0; i < jsonArray.size(); i++) { JsonObject jsonObject = jsonArray.get(i).getAsJsonObject(); Iterator<Entry<String, JsonElement>> iterator = jsonObject.entrySet().iterator(); while (iterator.hasNext()) { System.out.println(iterator.next()); } } } /** * 发送get请求 * @param getUrl 请求地址 * @return * @throws Exception */ public static String sendGet(String getUrl) throws Exception { HttpURLConnection connection = null; InputStream is = null; BufferedReader br = null; String result = null; URL url = new URL(getUrl); connection = (HttpURLConnection) url.openConnection(); connection.setRequestMethod("GET"); connection.connect(); if (connection.getResponseCode() == 200) { is = connection.getInputStream(); br = new BufferedReader(new InputStreamReader(is, "UTF-8")); StringBuffer sbf = new StringBuffer(); String temp = null; while ((temp = br.readLine()) != null) { sbf.append(temp+"\n"); sbf.append("\r\n"); } result = sbf.toString(); } return result; } public static void main(String[] args) throws Exception { String jsonStr = null; String getUrl = "http://www.yemaxgo.com/connect.php"; jsonStr = sendGet(getUrl); if(jsonStr!=null) { printJson(jsonStr); } } }
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niaonao 2018-08-13 01:22关注首先你需要一个JSON jar包
然后解析这个JSON对象即可,下面有个链接是HTTP发送JSON数据,解析JSON数据的示例//解析示例代码 JSONArray userarr = new JSONArray(userjson); JSONObject userobj = userarr.getJSONObject(0); user = new User(); //实例化 user 对象,否则报空指针异常 user.setUsername(userobj.getString("username")); user.setGender(userobj.getString("gender")); user.setAge(userobj.getInt("age"));
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fuweihua123 2018-08-13 01:29关注public static void main(String[] args) { HttpURLConnection connection = null; InputStream is = null; BufferedReader br = null; String result = null; try { URL url = new URL("http://www.yemaxgo.com/connect.php"); connection = (HttpURLConnection) url.openConnection(); connection.setRequestMethod("GET"); connection.setConnectTimeout(15000); connection.setReadTimeout(60000); connection.connect(); if (connection.getResponseCode() == 200) { is = connection.getInputStream(); br = new BufferedReader(new InputStreamReader(is, "UTF-8")); StringBuffer sbf = new StringBuffer(); String temp = null; while ((temp = br.readLine()) != null) { sbf.append(temp); sbf.append("\r\n"); } result = sbf.toString(); System.out.println("结果:"+result); //解析json /* [{"id":"9311","speed":"65","pm25":"83","temperature":"268","humidity":"66","" + "temperature_warning":"0","gas_warning":"0","humidity_warning":"0", "lowpower_warning":"0","mode":"1","timing_hour":"0","timing_minute":"0", "timing_second":"0","update_time":"2018-06-28 21:01:10"},{"time":"184882234"}]*/ JSONArray array = JSON.parseArray(result); com.alibaba.fastjson.JSONObject jo = array.getJSONObject(0); System.out.println("id:"+jo.getString("id")); System.out.println("speed:"+jo.getString("speed")); System.out.println("pm25:"+jo.getString("pm25")); System.out.println("temperature:"+jo.getString("temperature")); System.out.println("humidity:"+jo.getString("humidity")); System.out.println("temperature_warning:"+jo.getString("temperature_warning")); System.out.println("gas_warning:"+jo.getString("gas_warning")); System.out.println("humidity_warning:"+jo.getString("humidity_warning")); System.out.println("timing_second:"+jo.getString("timing_second")); System.out.println("update_time:"+jo.getString("update_time")); System.out.println("timing_hour:"+jo.getString("timing_hour")); com.alibaba.fastjson.JSONObject jo2 = array.getJSONObject(1); System.out.println("time"+jo2.getString("time")); } }catch (Exception e) { // TODO: handle exception e.printStackTrace(); } } 记得导一下 com.alibaba.fastjson
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将地址直接在浏览器输入,发现结果是[{"id":"9311","speed":"65","pm25":"83","temperature":"268","humidity":"66","temperature_warning":"0","gas_warning":"0","humidity_warning":"0","lowpower_warning":"0","mode":"1","timing_hour":"0","timing_minute":"0","timing_second":"0","update_time":"2018-06-28 21:01:10"},{"time":"184890422"}]
,是一个json数组。所以定义两个对象来接收,当然也可以不定义,直接转换成JSONObject。public class ObjectOne { private String id; private String speed; private String pm25; private String temperature; private String humidity; private String temperature_warning; private String gas_warning; private String humidity_warning; private String lowpower_warning; private String mode; private String timing_hour; private String timing_minute; private String timing_second; private String update_time; public ObjectOne() { } public ObjectOne(String id, String speed, String pm25, String temperature, String humidity, String temperature_warning, String gas_warning, String humidity_warning, String lowpower_warning, String mode, String timing_hour, String timing_minute, String timing_second, String update_time) { this.id = id; this.speed = speed; this.pm25 = pm25; this.temperature = temperature; this.humidity = humidity; this.temperature_warning = temperature_warning; this.gas_warning = gas_warning; this.humidity_warning = humidity_warning; this.lowpower_warning = lowpower_warning; this.mode = mode; this.timing_hour = timing_hour; this.timing_minute = timing_minute; this.timing_second = timing_second; this.update_time = update_time; } public String getId() { return id; } public void setId(String id) { this.id = id; } public String getSpeed() { return speed; } public void setSpeed(String speed) { this.speed = speed; } public String getPm25() { return pm25; } public void setPm25(String pm25) { this.pm25 = pm25; } public String getTemperature() { return temperature; } public void setTemperature(String temperature) { this.temperature = temperature; } public String getHumidity() { return humidity; } public void setHumidity(String humidity) { this.humidity = humidity; } public String getTemperature_warning() { return temperature_warning; } public void setTemperature_warning(String temperature_warning) { this.temperature_warning = temperature_warning; } public String getGas_warning() { return gas_warning; } public void setGas_warning(String gas_warning) { this.gas_warning = gas_warning; } public String getHumidity_warning() { return humidity_warning; } public void setHumidity_warning(String humidity_warning) { this.humidity_warning = humidity_warning; } public String getLowpower_warning() { return lowpower_warning; } public void setLowpower_warning(String lowpower_warning) { this.lowpower_warning = lowpower_warning; } public String getMode() { return mode; } public void setMode(String mode) { this.mode = mode; } public String getTiming_hour() { return timing_hour; } public void setTiming_hour(String timing_hour) { this.timing_hour = timing_hour; } public String getTiming_minute() { return timing_minute; } public void setTiming_minute(String timing_minute) { this.timing_minute = timing_minute; } public String getTiming_second() { return timing_second; } public void setTiming_second(String timing_second) { this.timing_second = timing_second; } public String getUpdate_time() { return update_time; } public void setUpdate_time(String update_time) { this.update_time = update_time; } @Override public String toString() { final StringBuilder sb = new StringBuilder("{"); sb.append("\"id\":\"") .append(id).append('\"'); sb.append(",\"speed\":\"") .append(speed).append('\"'); sb.append(",\"pm25\":\"") .append(pm25).append('\"'); sb.append(",\"temperature\":\"") .append(temperature).append('\"'); sb.append(",\"humidity\":\"") .append(humidity).append('\"'); sb.append(",\"temperature_warning\":\"") .append(temperature_warning).append('\"'); sb.append(",\"gas_warning\":\"") .append(gas_warning).append('\"'); sb.append(",\"humidity_warning\":\"") .append(humidity_warning).append('\"'); sb.append(",\"lowpower_warning\":\"") .append(lowpower_warning).append('\"'); sb.append(",\"mode\":\"") .append(mode).append('\"'); sb.append(",\"timing_hour\":\"") .append(timing_hour).append('\"'); sb.append(",\"timing_minute\":\"") .append(timing_minute).append('\"'); sb.append(",\"timing_second\":\"") .append(timing_second).append('\"'); sb.append(",\"update_time\":\"") .append(update_time).append('\"'); sb.append('}'); return sb.toString(); } }
public class ObjectTwo { private String time; public ObjectTwo() { } public ObjectTwo(String time) { this.time = time; } public String getTime() { return time; } public void setTime(String time) { this.time = time; } @Override public String toString() { final StringBuilder sb = new StringBuilder("{"); sb.append("\"time\":\"") .append(time).append('\"'); sb.append('}'); return sb.toString(); } }
import com.alibaba.fastjson.JSONArray; import com.alibaba.fastjson.JSONObject; import java.io.BufferedReader; import java.io.InputStream; import java.io.InputStreamReader; import java.net.HttpURLConnection; import java.net.URL; public class ReadUrl { public static void main(String args []){ String url = "http://www.yemaxgo.com/connect.php"; try{ String jsonStr = sendGet(url); System.out.println(jsonStr); //[{"id":"9311","speed":"65","pm25":"83","temperature":"268","humidity":"66","temperature_warning":"0","gas_warning":"0","humidity_warning":"0","lowpower_warning":"0","mode":"1","timing_hour":"0","timing_minute":"0","timing_second":"0","update_time":"2018-06-28 21:01:10"},{"time":"184884931"}] JSONArray jsonArray = JSONArray.parseArray(jsonStr); System.out.println(jsonArray); JSONObject obj1 = (JSONObject) jsonArray.get(0); JSONObject obj2 = (JSONObject) jsonArray.get(1); System.out.println(obj1); System.out.println(obj2); ObjectOne objectOne = JSONObject.parseObject(obj1.toJSONString(),ObjectOne.class); ObjectTwo objectTwo = JSONObject.parseObject(obj2.toJSONString(),ObjectTwo.class); System.out.println(objectOne); System.out.println(objectTwo); }catch(Exception e){ e.printStackTrace(); } } public static String sendGet(String getUrl) throws Exception { HttpURLConnection connection = null; InputStream is = null; BufferedReader br = null; String result = null; URL url = new URL(getUrl); connection = (HttpURLConnection) url.openConnection(); connection.setRequestMethod("GET"); connection.connect(); if (connection.getResponseCode() == 200) { is = connection.getInputStream(); br = new BufferedReader(new InputStreamReader(is, "UTF-8")); StringBuffer sbf = new StringBuffer(); String line = null; while ((line = br.readLine()) != null) { sbf.append(line); } result = sbf.toString(); } return result; } }
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需要fastjson-1.1.24.jar
此方法必须访问http请求,访问https需要httpclient
具体方法:@RequestMapping("geturl.do") public void geturl(HttpServletResponseresponse){ String url = "http://localhost:8080/Test/getUsers.do?id=1"; //new一个stringbuffer StringBuffer json = new StringBuffer(); try { //通过url获得连接 URL u = new URL(url); URLConnection yc = u.openConnection(); //读取返回的数据 BufferedReader in = new BufferedReader(new InputStreamReader(yc.getInputStream(),"UTF-8")); String inputline = null; while((inputline=in.readLine())!=null){ json.append(inputline); } in.close(); } catch (Exception e) { e.printStackTrace(); } //获得jsonobject JSONObject jo = JSON.parseObject(json.toString()); JSONObject jo2 = jo.getJSONObject("data"); //获得json数组 JSONArray ja = jo2.getJSONArray("users"); JSONObject jo3 = null; Users user = null; for (int i = 0; i < ja.size(); i++) { jo3 = ja.getJSONObject(i); user = new Users(); user.setId(jo3.getIntValue("id")); user.setUsername(jo3.getString("username")); user.setPassword(jo3.getString("password")); user.setAge(jo3.getIntValue("age")); user.setSex(jo3.getIntValue("sex")); System.out.println(user.getUsername()); } }
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看一看喽 2018-08-13 10:54关注package com.ruijie.spl.xhjy;
import java.io.IOException;
import java.util.HashMap;
import java.util.Map;import org.apache.http.HttpResponse;
import org.apache.http.client.HttpClient;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.entity.StringEntity;
import org.apache.http.impl.client.DefaultHttpClient;
import org.apache.http.protocol.HTTP;
import org.apache.http.util.EntityUtils;import com.ruijie.spl.xhjy.util.bean.Person;
import net.sf.json.JSONArray;
import net.sf.json.JSONObject;public class TestJsonObject {
public static void main(String[] args) {
String res = post("http://www.yemaxgo.com/connect.php","");
pase(res);} private static void pase(String res) { JSONArray resJsonArray= JSONArray.fromObject(res); System.out.println(resJsonArray.toString()); JSONObject jsonObject; for (int j= 0;j<resJsonArray.size();j++){ //获取JsonArray 中的JSONObject jsonObject=resJsonArray.getJSONObject(j); //获取JSONObject中的属性值,根据key jsonObject.get("id"); System.out.println( jsonObject.get("id")); //封装到对应的JavaBean 中,进行其他操作,插入数据库 System.out.println("属性封装对象"); } } /** * httppost * @param url * @param postStr * @return */ @SuppressWarnings({ "resource", "deprecation" }) public static String post(String url,String postStr) { String result = ""; try { HttpPost post = new HttpPost(url); StringEntity postEntity = new StringEntity(postStr,"UTF-8"); postEntity.setContentType("application/x-www-form-urlencoded"); post.setEntity(postEntity); HttpClient client = new DefaultHttpClient(); HttpResponse httpResponse = client.execute(post); result = EntityUtils.toString(httpResponse.getEntity(), HTTP.UTF_8); System.out.println(result); } catch(Exception ex) { ex.printStackTrace(); } return result; }
}
需要的包 httpclient-4.3.6.jar
<!-- JSONObject 开始 jdk15 不加会找不到包-->
net.sf.json-lib
json-lib
2.4
jdk15
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自由云时光机 2018-08-14 08:16关注import net.sf.json.JSONObject;
2 import org.apache.commons.httpclient.*;
3 import org.apache.commons.httpclient.methods.GetMethod;
4 import org.apache.commons.httpclient.params.HttpMethodParams;
5 import org.apache.http.HttpEntity;
6 import org.apache.http.HttpResponse;
7 import org.apache.http.client.methods.HttpPost;
8 import org.apache.http.entity.StringEntity;
9 import org.apache.http.impl.client.DefaultHttpClient;
10 import org.apache.http.util.EntityUtils;
11 import java.io.IOException;
12
13 /**
14 * Created by liqun.chen on 2017/5/15.
15 /
16 public class HttpUtil {
17 /*
18 * json 字符串
19 * @param url
20 * @param param
21 * @return
22 /
23 public static String getSerchPersion(String url,String param){
24 / 1 生成 HttpClinet 对象并设置参数 /
25 HttpClient httpClient = new HttpClient();
26 // 设置 Http 连接超时为5秒
27 httpClient.getHttpConnectionManager().getParams().setConnectionTimeout(5000);
28 / 2 生成 GetMethod 对象并设置参数 /
29 GetMethod getMethod = new GetMethod(url);
30 // 设置 get 请求超时为 5 秒
31 getMethod.getParams().setParameter(HttpMethodParams.SO_TIMEOUT, 5000);
32 // 设置请求重试处理,用的是默认的重试处理:请求三次
33 getMethod.getParams().setParameter(HttpMethodParams.RETRY_HANDLER, new DefaultHttpMethodRetryHandler());
34 String response = "";
35 / 3 执行 HTTP GET 请求 /
36 try {
37 int statusCode = httpClient.executeMethod(getMethod);
38 / 4 判断访问的状态码 /
39 if (statusCode != HttpStatus.SC_OK) {
40 System.err.println("请求出错: "+ getMethod.getStatusLine());
41 }
42 / 5 处理 HTTP 响应内容 /
43 // HTTP响应头部信息,这里简单打印
44 Header[] headers = getMethod.getResponseHeaders();
45 for (Header h : headers)
46 System.out.println(h.getName() + "------------ " + h.getValue());
47 // 读取 HTTP 响应内容,这里简单打印网页内容
48 byte[] responseBody = getMethod.getResponseBody();// 读取为字节数组
49 response = new String(responseBody, param);
50 System.out.println("----------response:" + response);
51 // 读取为 InputStream,在网页内容数据量大时候推荐使用
52 // InputStream response = getMethod.getResponseBodyAsStream();
53 } catch (HttpException e) {
54 // 发生致命的异常,可能是协议不对或者返回的内容有问题
55 System.out.println("请检查输入的URL!");
56 e.printStackTrace();
57 } catch (IOException e) {
58 // 发生网络异常
59 System.out.println("发生网络异常!");
60 e.printStackTrace();
61 } finally {
62 / 6 .释放连接 /
63 getMethod.releaseConnection();
64 }
65 return response;
66 }
67 /*
68 * post请求
69 * @param url
70 * @param json
71 * @return
72 */
73 public static JSONObject doPost(String url,JSONObject json){
74 DefaultHttpClient client = new DefaultHttpClient();
75 HttpPost post = new HttpPost(url);
76 JSONObject response = null;
77 try {
78 StringEntity s = new StringEntity(json.toString());
79 s.setContentEncoding("UTF-8");
80 s.setContentType("application/json");//发送json数据需要设置contentType
81 post.setEntity(s);
82 HttpResponse res = client.execute(post);
83 if(res.getStatusLine().getStatusCode() == HttpStatus.SC_OK){
84 HttpEntity entity = res.getEntity();
85 String result = EntityUtils.toString(res.getEntity());// 返回json格式:
86 response = JSONObject.fromObject(result);
87 }
88 } catch (Exception e) {
89 throw new RuntimeException(e);
90 }
91 return response;
92 }1 //调用
2 public static void main(String arg[]) throws Exception {
3 String url = "http://localhost:8080/";
4 JSONObject params = new JSONObject();
5 params.put("personName", "name");
6 params.put("personCode", "230882xxxxxx2116");
7 JSONObject param2 = new JSONObject();
8 param2.put("pageNo", 1);
9 param2.put("pageSize", 20);
10 params.put("page", param2);
11 String param = "q="+params.toString();
12 //get 请求
13 String ret = getSerchPersion(url, param.toString());
14 System.out.println(ret);
15 // JSONObject jsonResponse=JSONObject.fromObject(param);
16 // JSONObject json = (JSONObject)jsonResponse.get("page");
17 // System.out.println(json.get("pageSize"));
18
19 //post 请求
20 JSONObject jsonObject = doPost(url,params);
21 System.out.println(jsonObject.toString());
22 }本回答被题主选为最佳回答 , 对您是否有帮助呢? 本回答被专家选为最佳回答 , 对您是否有帮助呢? 本回答被题主和专家选为最佳回答 , 对您是否有帮助呢?解决 无用评论 打赏举报微信扫一扫
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