【Java123】XML与JSON互相转化

 http://www.bejson.com/json2javapojo/new/

https://www.cnblogs.com/111testing/p/9162229.html

https://wenku.baidu.com/view/8364d04b86c24028915f804d2b160b4e777f8102.html

https://www.jianshu.com/p/8dadd9a232b1

 

 

一个使用org.json的Demo：

 1 import org.apache.commons.io.IOUtils;
 2 import org.json.JSONException;
 3 import org.json.JSONObject;
 4 import org.json.XML;
 5 
 6 import java.io.IOException;
 7 import java.io.InputStream;
 8 
 9 public class XML2JSON {
10 
11     public XML2JSON(){}
12 
13     public static String xml2jsonString(String  filepath) throws IOException, JSONException {
14 
15         InputStream in = XML2JSON.class.getResourceAsStream(filepath);
16         String xml = IOUtils.toString(in);
17         System.out.print(xml);
18         System.out.println();
19 
20         JSONObject xmlJSONObj = XML.toJSONObject(xml);
21         String jsonStr = xmlJSONObj.toString();
22         System.out.print(jsonStr);
23 
24         return xmlJSONObj.toString();
25 
26     }
27 
28 
29     public static void main(String[] args) throws JSONException, IOException {
30 
31         String string = xml2jsonString("simple.xml");
32         System.out.println(string);
33 
34     }
35 
36 }

View Code

测试1：

<?xml version="1.0" encoding="ISO-8859-1"?> <current_observation>  <book id="bk101">
  <author>Gambardella, Matthew</author>
  <title>XML Developer‘s Guide</title>
  <genre>Computer</genre>
  <price>44.95</price>
  <publish_date>2000-10-01</publish_date>
  <description> An in-depth look at creating applications
   with XML.</description>
 </book>  <book id="bk102">
 <author>Ralls, Kim</author>
 <title>Midnight Rain</title>
 <credit>NOAA‘s National Weather Service</credit>
 <credit_URL>http://weather.gov/</credit_URL>
 </book>  <image>
  <url>http://weather.gov/images/xml_logo.gif</url>
  <title>NOAA‘s National Weather Service</title>
  <link>http://weather.gov</link>
 </image>  <location>New York/John F. Kennedy Intl Airport, NY</location>
 <station_id>KJFK</station_id>
 <latitude>40.66</latitude>
 <longitude>-73.78</longitude>
 <observation_time_rfc822>
  Mon, 11 Feb 2008 06:51:00 -0500 EST
 </observation_time_rfc822>  <weather>A Few Clouds</weather>
 <temp_f>11</temp_f>
 <temp_c>-12</temp_c>
 <relative_humidity>36</relative_humidity>
 <wind_dir>West</wind_dir>
 <wind_degrees>280</wind_degrees>
 <wind_mph>18.4</wind_mph>
 <wind_gust_mph>29</wind_gust_mph>
 <pressure_mb>1023.6</pressure_mb>
 <pressure_in>30.23</pressure_in>
 <dewpoint_f>-11</dewpoint_f>
 <dewpoint_c>-24</dewpoint_c>
 <windchill_f>-7</windchill_f>
 <windchill_c>-22</windchill_c>
 <visibility_mi>10.00</visibility_mi>  <icon_url_base>
  http://weather.gov/weather/images/fcicons/
 </icon_url_base>
 <icon_url_name>nfew.jpg</icon_url_name>
 <two_day_history_url>
  http://www.weather.gov/data/obhistory/KJFK.html
 </two_day_history_url>
 <disclaimer_url>
  http://weather.gov/disclaimer.html
 </disclaimer_url>
 <copyright_url>
  http://weather.gov/disclaimer.html
 </copyright_url> </current_observation>   {"current_observation":{"copyright_url":"http://weather.gov/disclaimer.html","windchill_f":-7,"windchill_c":-22,"book":[{"author":"Gambardella, Matthew","price":44.95,"genre":"Computer","description":" An in-depth look at creating applications\r\n\t\t\twith XML.","id":"bk101","title":"XML Developer‘s Guide","publish_date":"2000-10-01"},{"author":"Ralls, Kim","credit_URL":"http://weather.gov/","id":"bk102","title":"Midnight Rain","credit":"NOAA‘s National Weather Service"}],"latitude":40.66,"two_day_history_url":"http://www.weather.gov/data/obhistory/KJFK.html","temp_c":-12,"temp_f":11,"wind_mph":18.4,"wind_degrees":280,"icon_url_base":"http://weather.gov/weather/images/fcicons/","icon_url_name":"nfew.jpg","weather":"A Few Clouds","dewpoint_f":-11,"longitude":-73.78,"image":{"link":"http://weather.gov","title":"NOAA‘s National Weather Service","url":"http://weather.gov/images/xml_logo.gif"},"dewpoint_c":-24,"station_id":"KJFK","wind_dir":"West","pressure_in":30.23,"wind_gust_mph":29,"disclaimer_url":"http://weather.gov/disclaimer.html","location":"New York/John F. Kennedy Intl Airport, NY","relative_humidity":36,"pressure_mb":1023.6,"visibility_mi":10,"observation_time_rfc822":"Mon, 11 Feb 2008 06:51:00 -0500 EST"}}

 

测试2：

<?xml version="1.0" encoding="ISO-8859-1"?>
<!-- Edited with XML Spy v2007 (http://www.altova.com) -->
<current_observation>   <book/>  <book></book>  <book id="bk98"/>  <book id="bk99"> Hello World!</book>  <book id="bk100">
  <author>Helen</author>
  <author>Jason</author>
 </book>
 <book id="bk101">
  <author>Gambardella, Matthew</author>
  <title>XML Developer‘s Guide</title>
  <genre>Computer</genre>
  <price>44.95</price>
  <publish_date>2000-10-01</publish_date>
  <description> An in-depth look at creating applications
   with XML.</description>
 </book>  <book id="bk102">
 <author>Ralls, Kim</author>
 <title>Midnight Rain</title>
 <credit>NOAA‘s National Weather Service</credit>
 <credit_URL>http://weather.gov/</credit_URL>
 </book> </current_observation>
{"current_observation":{ "book":[ "", "",{"id":"bk98"},{"id":"bk99", "content":"Hello World!"},{ "author":["Helen","Jason"],"id":"bk100"},{"author":"Gambardella, Matthew","price":44.95,"genre":"Computer","description":" An in-depth look at creating applications\r\n\t\t\twith XML.","id":"bk101","title":"XML Developer‘s Guide","publish_date":"2000-10-01"},{"author":"Ralls, Kim","credit_URL":"http://weather.gov/","id":"bk102","title":"Midnight Rain","credit":"NOAA‘s National Weather Service"} ]}}

 

 

各路方法，有使用第三方API，或者自写遍历迭代方法。

 

在针对上述Demo的测试结果做分析，还需要进一步考虑以下几点：

1. 源XML文件自身特殊及复杂情况的转换定义。比如，字段含特殊字符，一个标签含多个属性，多个标签同名，invalid file等。

2. 目标JSON文件的转换定义。比如，各元素是否保持原有顺序，多个同名标签作为数组还是同级对象，等。

3. 转换过程中的异常处理。比如，转换中遇到无法解析而跳出导致该目标文件无效，异常捕获记录，等。

 

 

 

https://blog.csdn.net/bestxiaok/article/details/80443640