Java-->Json解析网页数据

--> 官方解析jar包： 链接：http://pan.baidu.com/s/1pKDnXKv 密码：694d

--> 离线Json格式检测工具： 链接：http://pan.baidu.com/s/1eSHkrOe 密码：ju95

--> HttpUtil 工具类

package com.dragon.java.jsonwebdata;

import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.net.HttpURLConnection;
import java.net.URL;

/**
* 得到服务器响应的数据流的工具类
*
* @author Auser
*
*/
public class HttpUtil {

public static InputStream getInputStreamByPost(String url, String parms) {
try {
HttpURLConnection conn = (HttpURLConnection) new URL(url)
.openConnection();
conn.setReadTimeout(5000);
conn.setConnectTimeout(5000);
conn.setRequestMethod("POST");
conn.setDoOutput(true);

OutputStream outputStream = conn.getOutputStream();
outputStream.write(parms.getBytes());
if (conn.getResponseCode() == HttpURLConnection.HTTP_OK) {
return conn.getInputStream();
}
} catch (IOException e) {
e.printStackTrace();
}
return null;
}
}

--> InputStreamUtil 工具类

package com.dragon.java.jsonwebdata;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;

/**
* 将服务器响应数据流转换成String的工具类
*
* @author Auser
*
*/
public class InputStreamUtil {

public static String inputStreamToString(InputStream is) {
try (BufferedReader br = new BufferedReader(new InputStreamReader(is));) {
String line = null;
while ((line = br.readLine()) != null) {
return line;
}
} catch (IOException e) {
e.printStackTrace();
}
return null;
}
}

--> JsonUtil 工具类

package com.dragon.java.jsonwebdata;

import java.util.ArrayList;
import java.util.List;

import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;

/**
* Json解析的工具类
*
* @author Auser
*
*/
public class JsonUtil {
/**
* 官方解析方法 --> 不管多复杂都可以解析，但是非常复杂！！！
*
* @param json
*/
public static void jsonParse(String json) {
List<Detail> details = new ArrayList<>();
try {
JSONObject object = new JSONObject(json);
if (object.getString("status").equals("000000")) {
if (object.getString("desc").equals("null")) {
details = JSONArray(details, object);
for (Detail detail : details) {
System.out.println(detail);
}
}
}
} catch (JSONException e) {
e.printStackTrace();
}
}

/**
* Json数组
*
* @param details
* @param object
* @return List<Detail>
* @throws JSONException
*/
private static List<Detail> JSONArray(List<Detail> details,
JSONObject object) throws JSONException {
JSONArray array = object.getJSONArray("detail");
for (int i = 0; i < array.length(); i++) {
JSONObject object2 = array.getJSONObject(i);
int id = object2.getInt("id");
int xhid = object2.getInt("xhid");
String author = object2.getString("author");
String content = object2.getString("content");
String picUrl = object2.getString("picUrl");
String status = object2.getString("status");
Detail detail = new Detail(id, xhid, author, content, picUrl,
status);
details.add(detail);
}
return details;
}
}

--> Test 测试类

package com.dragon.java.jsonwebdata;

import java.util.Scanner;

/*
* Json解析网页数据
*/
public class Test {
public static void main(String[] args) {
Scanner scanner = new Scanner(System.in);
System.out.println("请输入页数:");
int currentPage = scanner.nextInt();
System.out.println("请输入每页笑话数:");
int size = scanner.nextInt();

String url = "http://api.1-blog.com/biz/bizserver/xiaohua/list.do";
String parms = "currentPage=" + currentPage + "&size=" + size;
// 得到服务器响应的数据并转换成String
String json = InputStreamUtil.inputStreamToString(HttpUtil
.getInputStreamByPost(url, parms));
// Json解析
JsonUtil.jsonParse(json);
}
}

--> 写完发现用官方的解析方法，那是极复杂的...还是Gson方便！

************之前忘的Detail类************

package com.dragon.java.hwgsonparse;

public class Detail {
private int id;
private String city;
private String county;
private String date;
private String day_conditon;
private String day_wind;
private String day_temperature;
private String night_codition;
private String night_wind;
private String night_temperature;
private long update_time;

public Detail() {
super();
}

public Detail(int id, String city, String county, String date,
String day_conditon, String day_wind, String day_temperature,
String night_codition, String night_wind, String night_temperature,
long update_time) {
super();
this.id = id;
this.city = city;
this.county = county;
this.date = date;
this.day_conditon = day_conditon;
this.day_wind = day_wind;
this.day_temperature = day_temperature;
this.night_codition = night_codition;
this.night_wind = night_wind;
this.night_temperature = night_temperature;
this.update_time = update_time;
}

public int getId() {
return id;
}

public void setId(int id) {
this.id = id;
}

public String getCity() {
return city;
}

public void setCity(String city) {
this.city = city;
}

public String getCounty() {
return county;
}

public void setCounty(String county) {
this.county = county;
}

public String getDate() {
return date;
}

public void setDate(String date) {
this.date = date;
}

public String getDay_conditon() {
return day_conditon;
}

public void setDay_conditon(String day_conditon) {
this.day_conditon = day_conditon;
}

public String getDay_wind() {
return day_wind;
}

public void setDay_wind(String day_wind) {
this.day_wind = day_wind;
}

public String getDay_temperature() {
return day_temperature;
}

public void setDay_temperature(String day_temperature) {
this.day_temperature = day_temperature;
}

public String getNight_codition() {
return night_codition;
}

public void setNight_codition(String night_codition) {
this.night_codition = night_codition;
}

public String getNight_wind() {
return night_wind;
}

public void setNight_wind(String night_wind) {
this.night_wind = night_wind;
}

public String getNight_temperature() {
return night_temperature;
}

public void setNight_temperature(String night_temperature) {
this.night_temperature = night_temperature;
}

public long getUpdate_time() {
return update_time;
}

public void setUpdate_time(long update_time) {
this.update_time = update_time;
}

@Override
public String toString() {
return "Detail [id=" + id + ", city=" + city + ", county=" + county
+ ", date=" + date + ", day_conditon=" + day_conditon
+ ", day_wind=" + day_wind + ", day_temperature="
+ day_temperature + ", night_codition=" + night_codition
+ ", night_wind=" + night_wind + ", night_temperature="
+ night_temperature + "]";
}

}

Detail